Abstract
Throughout the world, the most widely used construction material is concrete. It is the second most consumed substance on the earth after water. As concrete being used for construction of most of the buildings, bridges etc., it has been labelled as the backbone to the infrastructure development of nation. It is commonly made by mixing Portland cement with sand, crushed rock and water. It is very clear that among the all components, aggregate and water is largely available material in India at very low cost. As cement is comparatively high cost it would be advisable to use other locally available industrial and agricultural waste material to replace the cement partially. Ground Granulated Blast-furnace Slag (GGBS) is a non-metallic and non-hazardous waste material of Iron Industry. Therefore the minimization of this waste material without a harmful effect on nature has a vital importance.The present work focused on the utilization of GGBS in concrete which can be suitably used under the Indian conditions. For this purpose, the various tests on properties of green and hardened concrete have been performed. The properties of green concrete have been analyzed by workability of concrete in terms of slump value whereas the properties of hardened concrete have been analyzed in terms of mechanical and physical properties of concrete. The mechanical properties of hardened concrete include the compressive strength, flexural strength and split tensile strength whereas physical properties includes the dry & moist density and water absorption of hardened concrete. On the basis of present work we found that GGBS in concrete improves workability, compressive strength, flexural strength, split tensile strength and decreases the density & water absorption characteristics of hardened concrete. As a result the cost of concrete decreases. Also GGBS leads to the significant reduction in the quantity of cement which enables the reduction in CO2 emission and reduction in energy consumption in production of cement.
Keywords: GGBS, cement, fine and coarse aggregate and concrete
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Effect of partial replacement of natural sand with crushed sand along with su...eSAT Journals
Abstract
The effect of partial replacement of natural sand (NS) by crushed sand (CS) and partial replacement of cement by supplementary cementing material have been investigated. All the trials have been taken at actual construction site and tested at site laboratory. Supplementary Cementing materials (SCM) Fly Ash and GGBS have been used and cement has been replaced by three combination of Fly ash (15%, 20%, 25%) and two combinations of GGBS (40% & 50%). In both the cases , 50% natural sand have been replaced by crushed sand .Both the materials have shown good compatible results when used and it is found that use of SCM gives better result in terms of compressive strength and workability due to reduction in w/c ratio. This paper puts forward the applications of crushed sand and supplementary cementing materials as an attempt towards sustainable development. It will help to find viable solution to the declining availability of natural sand to make eco-balance.
Keywords: Crushed Sand (CS), Natural Sand (NS), Fly Ash (FA), Ground Granulated Blast Furnace Slag (GGBS), Admixture.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
AN EXPERIMENTAL INVESTIGATION ON THE PERFORMANCE OF HIGH VOLUME GROUND GRANUL...IAEME Publication
This paper reports the effect of high volume of GGBS on the properties of structural
concrete. In this study, GGBS is physically and chemically characterized and partially
replaced in the ratio of 10% to 90% by weight of cement. The fresh properties of GGBS
concrete like slump test and hardened properties like compressive strength, Split tensile
strength, Modulus of Elasticity are carried out. In addition to this the carbon foot prints are
also calculated and the savings per capita per year is determined for reduction of usage of
cement. The test results indicated that fresh and hardened properties of the GGBS concrete
increases as the percentage of replacement of GGBS increases up to certain extent
Effect of aggregate size and silica fume on the workability of geoploymer con...eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
The need for efficient and better construction methods and materials is increasing day by day due to the rapid urbanization taking place around the globe at the same time it is our responsibility to make sure that the application of materials involved in the construction does not create adverse environmental impacts. In this research an attempt to review the optimization of the material usage of a hollow core in Reinforced concrete (RC) flexural members in the zone of tension. This shall facilitate the reduction of the dead loads which is an important factor with respect to seismic effect on structures. This paper studies the research works carried out on RC hollow beams in order to understand the flexural behaviour compared with the conventional solid beams.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Effect of partial replacement of natural sand with crushed sand along with su...eSAT Journals
Abstract
The effect of partial replacement of natural sand (NS) by crushed sand (CS) and partial replacement of cement by supplementary cementing material have been investigated. All the trials have been taken at actual construction site and tested at site laboratory. Supplementary Cementing materials (SCM) Fly Ash and GGBS have been used and cement has been replaced by three combination of Fly ash (15%, 20%, 25%) and two combinations of GGBS (40% & 50%). In both the cases , 50% natural sand have been replaced by crushed sand .Both the materials have shown good compatible results when used and it is found that use of SCM gives better result in terms of compressive strength and workability due to reduction in w/c ratio. This paper puts forward the applications of crushed sand and supplementary cementing materials as an attempt towards sustainable development. It will help to find viable solution to the declining availability of natural sand to make eco-balance.
Keywords: Crushed Sand (CS), Natural Sand (NS), Fly Ash (FA), Ground Granulated Blast Furnace Slag (GGBS), Admixture.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
AN EXPERIMENTAL INVESTIGATION ON THE PERFORMANCE OF HIGH VOLUME GROUND GRANUL...IAEME Publication
This paper reports the effect of high volume of GGBS on the properties of structural
concrete. In this study, GGBS is physically and chemically characterized and partially
replaced in the ratio of 10% to 90% by weight of cement. The fresh properties of GGBS
concrete like slump test and hardened properties like compressive strength, Split tensile
strength, Modulus of Elasticity are carried out. In addition to this the carbon foot prints are
also calculated and the savings per capita per year is determined for reduction of usage of
cement. The test results indicated that fresh and hardened properties of the GGBS concrete
increases as the percentage of replacement of GGBS increases up to certain extent
Effect of aggregate size and silica fume on the workability of geoploymer con...eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
The need for efficient and better construction methods and materials is increasing day by day due to the rapid urbanization taking place around the globe at the same time it is our responsibility to make sure that the application of materials involved in the construction does not create adverse environmental impacts. In this research an attempt to review the optimization of the material usage of a hollow core in Reinforced concrete (RC) flexural members in the zone of tension. This shall facilitate the reduction of the dead loads which is an important factor with respect to seismic effect on structures. This paper studies the research works carried out on RC hollow beams in order to understand the flexural behaviour compared with the conventional solid beams.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Performance evaluation of bituminous concrete incorporating crumb rubber and ...eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Enhancement of torsional resistance in fibrous normal strength concrete beamseSAT Journals
Abstract This paper highlights the influence of thickness of concrete cover on the torsional resistance in the fibrous rectangular solid concrete beams under pure torsion. In this investigation, thickness of concrete cover vary between 18 and 53 mm. To study the influence of concrete cover in under-reinforced fibrous normal strength concrete, four fibrous concrete beams were cast and test under pure torsion. The under-reinforced concrete beams was designed based on ACI-318-14. The transverse and longitudinal reinforcement indexes are kept constant in the beams. While the aspect ratio of the beam cross section and span to depth ratio of the beams are 1.22 and 5.75, respectively. The test results were claimed that the torsional resistance provided by concrete and reinforcements plus fibre were enhanced at crack and peak loads up to 76.4% and 64.4%, respectively. In contrast, twisting angle, shear strain in concrete, strain in transverse and longitudinal reinforcements were reduced up to 57.8%, 65%, 89.3% and 95.6%, respectively. The spacing between cracks and the angle of inclination of crack at failure was increased whereas the number of cracks reduced. The dimensional analysis was used to proposed equations to predict torsional resistance at crack and peak loads including the contribution of concrete cover. In addition, the Buckingham П theorem was used for this purpose. Based on the 34 data from previous researches and the data in this research, nonlinear multiple regressions in Minitab software version 16 was used to predict the coefficients of the proposed П-groups equations. The proposed models have shown a good agreement with test results. Keywords: Fibrous Concrete, Concrete Cover, and Dimensional Analysis
Utilization of Industrial Waste Material in GSB LayerIJERA Editor
India has series of steel plant clusters located along its length and breadth of the territory. Several million metric tons of iron and steel are produced in these plants annually. Along with the production of iron and steel, huge quantities of solid wastes like blast furnace slag and steel slag as well as other wastes such as flue dust, blast furnace sludge, and refractories are also being produced in these plants. These solid wastes can be used as non-traditional/non-conventional aggregates in pavement construction due to acute scarcity of traditional/conventional road construction materials. A study was conducted to investigate the possibility of using Granulated Blast Furnace Slag (GBFS) with various blended mixes of traditional/conventional aggregates in subbase layer with different percentages. This study also presents the result of experimental investigation on the influence of Rice husk ash (RHA) on the index properties of Red soil which is used as filler material in subbase layer.
Utilization of pond fly ash as a partial replacement in fine aggregate with u...eSAT Journals
Abstract Due to increase in the growth of industrial sectors the power requirement of the country is rapidly increasing. India depends on Thermal Power as its main source, thus increase in power requirement every year. Present scenario of our country shows 75 % of country’s total installed power generation is thermal of which coal-based generation is 90%. The coal reserves of the country are predominately of lower grades (average of 35% ash content), non cooking and as a result more than 110 million MT coal ash is being generated every year. Ash generation may likely reach to 170 million MT by 2012. Use of coal brings huge amount of ash every year. Lots of research has been carried out for effective utilization of fly ash in construction industries due to its fine particles and Pozzolonic properties. But little literature is available on pond ash utilization. Pond ash being coarser and less Pozzolonic than fly ash can be used as fine aggregates in concrete by partial replacement of sand. As per M60 Mix Design in this project we will replace the alccofine and fine fly ash partially with cement and pond fly ash as a replacement of fine aggregate. In mix G1, G2, G3 we will replace cement with alccofine 4% and fine fly ash 26% and pond fly ash varies 10%, 20%, and 30% as replacement of F.A. Similarly in mix G4,G5,G6 alccofine 6% and fine fly ash 24% and pond fly ash same as 10%,20%,30%. The Concrete specimens will tested at different age level for Mechanical Properties of concrete, namely, Cube Compressive Strength, Split Tensile Strength, Flexural Strength with other properties such as Compacting Factor, with respect to 7,28,56,90 Days strength. The main aim of our study as project is to get the economical and eco friendly High strength Concrete (HSC).
HIGH PERFORMANCE CONCRETE WITH QUAINARY BLENDAM Publications
The concrete is probably most extensively used for construction material in the world. The conventional concrete does not serve the present needs. It is considered as durable & strong material, reinforced concrete is one of the most popular materials. It improves workability, durability & the ultimate strength of the concrete. The utilization of supplementary cementitious material is accepted since it leads to several possible improvements in the concrete composites as well as overall economy. Subsequently these have led to the development of binary, ternary, quaternary blend which can further improve properties of concrete. The present paper deals with the study of properties namely workability & compressive strength of various grade of HPC using quainary mixesto find out the sustainable saving in quainary of cement & less production of cement meansincorporating cement , fly ash, silica fume, GGBS & rice husk ash with admixture & to reduce the quantity of cement with SCMs & durability of the concrete which helps to increased the workability& increase the strength of the concrete using various percentage of SCMs in M80 grade Concrete.The result also shows that strength of ternary, quaternary blended concrete. Therefore it can be said that, quainary mix is replacement of 40% cement. The virtual elimination of voids can be reduced due to use of one more cementitious material i.e. Rice Husk in quainary blended HPC Concrete & hence the strength of concrete can be increased than Ternary and Quaternary blend.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Performance evaluation of bituminous concrete incorporating crumb rubber and ...eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Enhancement of torsional resistance in fibrous normal strength concrete beamseSAT Journals
Abstract This paper highlights the influence of thickness of concrete cover on the torsional resistance in the fibrous rectangular solid concrete beams under pure torsion. In this investigation, thickness of concrete cover vary between 18 and 53 mm. To study the influence of concrete cover in under-reinforced fibrous normal strength concrete, four fibrous concrete beams were cast and test under pure torsion. The under-reinforced concrete beams was designed based on ACI-318-14. The transverse and longitudinal reinforcement indexes are kept constant in the beams. While the aspect ratio of the beam cross section and span to depth ratio of the beams are 1.22 and 5.75, respectively. The test results were claimed that the torsional resistance provided by concrete and reinforcements plus fibre were enhanced at crack and peak loads up to 76.4% and 64.4%, respectively. In contrast, twisting angle, shear strain in concrete, strain in transverse and longitudinal reinforcements were reduced up to 57.8%, 65%, 89.3% and 95.6%, respectively. The spacing between cracks and the angle of inclination of crack at failure was increased whereas the number of cracks reduced. The dimensional analysis was used to proposed equations to predict torsional resistance at crack and peak loads including the contribution of concrete cover. In addition, the Buckingham П theorem was used for this purpose. Based on the 34 data from previous researches and the data in this research, nonlinear multiple regressions in Minitab software version 16 was used to predict the coefficients of the proposed П-groups equations. The proposed models have shown a good agreement with test results. Keywords: Fibrous Concrete, Concrete Cover, and Dimensional Analysis
Utilization of Industrial Waste Material in GSB LayerIJERA Editor
India has series of steel plant clusters located along its length and breadth of the territory. Several million metric tons of iron and steel are produced in these plants annually. Along with the production of iron and steel, huge quantities of solid wastes like blast furnace slag and steel slag as well as other wastes such as flue dust, blast furnace sludge, and refractories are also being produced in these plants. These solid wastes can be used as non-traditional/non-conventional aggregates in pavement construction due to acute scarcity of traditional/conventional road construction materials. A study was conducted to investigate the possibility of using Granulated Blast Furnace Slag (GBFS) with various blended mixes of traditional/conventional aggregates in subbase layer with different percentages. This study also presents the result of experimental investigation on the influence of Rice husk ash (RHA) on the index properties of Red soil which is used as filler material in subbase layer.
Utilization of pond fly ash as a partial replacement in fine aggregate with u...eSAT Journals
Abstract Due to increase in the growth of industrial sectors the power requirement of the country is rapidly increasing. India depends on Thermal Power as its main source, thus increase in power requirement every year. Present scenario of our country shows 75 % of country’s total installed power generation is thermal of which coal-based generation is 90%. The coal reserves of the country are predominately of lower grades (average of 35% ash content), non cooking and as a result more than 110 million MT coal ash is being generated every year. Ash generation may likely reach to 170 million MT by 2012. Use of coal brings huge amount of ash every year. Lots of research has been carried out for effective utilization of fly ash in construction industries due to its fine particles and Pozzolonic properties. But little literature is available on pond ash utilization. Pond ash being coarser and less Pozzolonic than fly ash can be used as fine aggregates in concrete by partial replacement of sand. As per M60 Mix Design in this project we will replace the alccofine and fine fly ash partially with cement and pond fly ash as a replacement of fine aggregate. In mix G1, G2, G3 we will replace cement with alccofine 4% and fine fly ash 26% and pond fly ash varies 10%, 20%, and 30% as replacement of F.A. Similarly in mix G4,G5,G6 alccofine 6% and fine fly ash 24% and pond fly ash same as 10%,20%,30%. The Concrete specimens will tested at different age level for Mechanical Properties of concrete, namely, Cube Compressive Strength, Split Tensile Strength, Flexural Strength with other properties such as Compacting Factor, with respect to 7,28,56,90 Days strength. The main aim of our study as project is to get the economical and eco friendly High strength Concrete (HSC).
HIGH PERFORMANCE CONCRETE WITH QUAINARY BLENDAM Publications
The concrete is probably most extensively used for construction material in the world. The conventional concrete does not serve the present needs. It is considered as durable & strong material, reinforced concrete is one of the most popular materials. It improves workability, durability & the ultimate strength of the concrete. The utilization of supplementary cementitious material is accepted since it leads to several possible improvements in the concrete composites as well as overall economy. Subsequently these have led to the development of binary, ternary, quaternary blend which can further improve properties of concrete. The present paper deals with the study of properties namely workability & compressive strength of various grade of HPC using quainary mixesto find out the sustainable saving in quainary of cement & less production of cement meansincorporating cement , fly ash, silica fume, GGBS & rice husk ash with admixture & to reduce the quantity of cement with SCMs & durability of the concrete which helps to increased the workability& increase the strength of the concrete using various percentage of SCMs in M80 grade Concrete.The result also shows that strength of ternary, quaternary blended concrete. Therefore it can be said that, quainary mix is replacement of 40% cement. The virtual elimination of voids can be reduced due to use of one more cementitious material i.e. Rice Husk in quainary blended HPC Concrete & hence the strength of concrete can be increased than Ternary and Quaternary blend.
A comparative study on effect of basic oxygen furnace slag and iron cutting w...eSAT Journals
Abstract
Production of residues from industries and construction sector has increased during last few years. Much of these wastes have been thrown to land fill, without considering its potential for reuse and re-cycling as well. The aim of this practical work, is to study the properties and the respective strength that is (compressive strength) gained by M-20 Grade of concrete mix, prepared under controlled condition. The laborites test have follow the IS Standards. The results vary according to the proportions of supplementary constituent added to the mix. The substitution of cement concrete with basic oxygen furnace slag (BOFS) and then followed by iron cutting waste (ICW), produces a significant increase in compressive strength in both the cases i.e., by adding basic oxygen furnace slag & iron cutting waste.
The above said waste material not only makes the concrete mix prepared, suitable for use, but also improves the strength of mix and makes the mix economical as well. In the M-20 concrete mix, sand is replaced with BOF Slag and then with ICW in the varying range of 10%, 20% and 30% by weight. The test is carried out to evaluate the compressive strength of controlled M-20 Grade of mix after 7 and 28 days of casting.
Keywords: Basic Oxygen Furnace Slag (B.O.F), Iron Cutting Waste (ICW) , Coarse and Fine Aggregate, Compressive Strength
Characterization of limestone waste for construction of flexible pavementeSAT Journals
Abstract
This paper reports about the survey work carried out to determine the total limestone waste generated at the quarry sites located in
seven villages of Chittapurtaluk in Gulbarga district and also experimental investigation carried out on this limestone waste to find
out its feasibility for construction of flexible pavement layers. From the survey work carried out at seven villages of Chittapurtaluka it
was observed that about 70 lakh tonnes of waste would be produced every year. Characterization of this limestone waste by
conducting laboratory studies to find out its feasibility for road construction would help to reduce the demand-supply gap for
aggregates, conserve depleting sources of good quality stone aggregate and decrease environmental degradation due to excessive
quarrying activities. Laboratory investigation includes determination of physical properties of limestone waste aggregates,
preparation of job mix formulae for Granular Sub Base (GSB) and Wet Mix Macadam (WMM) layers, Modified proctor compaction
test to evaluate maximum dry density and optimum moisture content on WMM and GSB mixes, CBR test and Direct Shear test on GSB
mixes. Laboratory results were compared with conventional Basalt aggregates. Results reveals that lime stone aggregates fulfill the
requirements of MoRT&H-2001 and can completely replace the conventional aggregate like Basalt in GSB and WMM layers.
Characterization of limestone waste for construction of flexible pavementeSAT Journals
Abstract
This paper reports about the survey work carried out to determine the total limestone waste generated at the quarry sites located in
seven villages of Chittapurtaluk in Gulbarga district and also experimental investigation carried out on this limestone waste to find
out its feasibility for construction of flexible pavement layers. From the survey work carried out at seven villages of Chittapurtaluka it
was observed that about 70 lakh tonnes of waste would be produced every year. Characterization of this limestone waste by
conducting laboratory studies to find out its feasibility for road construction would help to reduce the demand-supply gap for
aggregates, conserve depleting sources of good quality stone aggregate and decrease environmental degradation due to excessive
quarrying activities. Laboratory investigation includes determination of physical properties of limestone waste aggregates,
preparation of job mix formulae for Granular Sub Base (GSB) and Wet Mix Macadam (WMM) layers, Modified proctor compaction
test to evaluate maximum dry density and optimum moisture content on WMM and GSB mixes, CBR test and Direct Shear test on GSB
mixes. Laboratory results were compared with conventional Basalt aggregates. Results reveals that lime stone aggregates fulfill the
requirements of MoRT&H-2001 and can completely replace the conventional aggregate like Basalt in GSB and WMM layers.
Keywords: Lime stone Waste, Basalt, GSB, WMM and Job mix Formulae
Characterization of limestone waste for construction of flexible pavementeSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Experimental investigation on concrete by replacing crusher dust as fine aggr...eSAT Journals
Abstract In this present work we identified and investigated the use of crusher dust and granite floor slab chips in concrete as an alternative fine aggregate and coarse aggregate respectively, the tests were conducted on standard concrete cubes (150 mm x 150 mm x 150 mm), cylinders (150 mm x 300 mm) and prisms (100 mm x 100 mm x 500 mm). Tests on the physical properties of crusher dust, granite chips and its influence on the strength of fresh and hardened state, along with a comparative study with the concrete of river sand are made. The properties investigated were specific gravity, fineness modulus, water absorption, free surface moisture, bulk density and grading zone. Tests were conducted on 6 cubes, 6 cylinders and 6 prisms for M20 grade mix design with sand and crusher dust as fine aggregates, granite metal and granite floor slab chips as coarse aggregates. The strength parameters compressive strength, Split-Tensile strength and flexural strength were compared at 7 days and 28 days respectively. Mix design procedure in accordance with IS 10262-2009, IS 456-2000 and Sp 23-1982 using 20mm coarse aggregate was adopted for investigation. The investigation indicates that crushed stone dust has vast potential as fine aggregate in concrete construction. Crusher dust not only reduces the cost of construction but also helps reduce the impact on environment by consuming the material hitherto considered as a waste product with few applications. Keywords: Crusher Dust, Granite Floor Slab Chips, Concrete Mix.
Study of bituminous concrete under different mix conditionseSAT Journals
Abstract The use of bitumen in road construction has increased many-fold throughout the world due to its compatibility, the ease in road construction and above all the advantage of allowing traffic immediately after construction. The most common binder used for road surfacing is bitumen obtained from petroleum However; Petroleum is nowadays becoming scarce due to depletion of its source. Even though bitumen is widely used in road construction, there are some drawbacks in bituminous mix like high susceptibility to temperature variation, tendency to crack, lesser effective service life etc. Therefore, bituminous pavements fail to give the expected service life under adverse climatic, environmental and traffic condition. In an attempt to enhance the service life of bituminous surfacing under adverse prevailing conditions, research is going on throughout the world in the area of additives in search of improved, durable and cost effective bituminous binders. The main objective of this study is to evaluate the properties of bituminous mixes that can be made by use of different grading of bitumen like VG10 VG30 VG40 and different grading of aggregate with using of code references. Keywords: Bitumen, Petroleum, Susceptibility
Study on the Effect of Ggbs & M Sand in Self Compacting oncretetheijes
Conventional concrete is the most widely used construction material throughout the world because of its versality, mouldability, durability, and resistance to fire and energy efficiency. However, its major disadvantages like poor tensile strength, limited ductility and little resistance to cracking resists its use as a structural material. Hence, in order to overcome these difficulties several new materials have been developed in the recent past.Admixtures are ingredients other than water, aggregates, hydraulic cement and fibers that are added to the concrete batch immediately before or during mixing. Mineral admixtures are usually added to concrete in larger amounts to enhance the workability of fresh concrete, to improve resistance of concrete to thermal cracking, alkali-aggregate expansion and sulphate attack and to enable a reduction in cement content. The objective of this study is to evaluate the effectiveness of various mineral admixtures in producing SCC. In this study the scope of GGBS ( Ground granular blast furnace slag ) as a mineral admixture to some percentage replace cement in SCC were studied. The study showed that a maximum of 50% GGBS were able to be used as a mineral admixture without affecting the self-compactability
Similar to Properties of concrete incorporated with ggbs (20)
Mechanical properties of hybrid fiber reinforced concrete for pavementseSAT Journals
Abstract
The effect of addition of mono fibers and hybrid fibers on the mechanical properties of concrete mixture is studied in the present
investigation. Steel fibers of 1% and polypropylene fibers 0.036% were added individually to the concrete mixture as mono fibers and
then they were added together to form a hybrid fiber reinforced concrete. Mechanical properties such as compressive, split tensile and
flexural strength were determined. The results show that hybrid fibers improve the compressive strength marginally as compared to
mono fibers. Whereas, hybridization improves split tensile strength and flexural strength noticeably.
Keywords:-Hybridization, mono fibers, steel fiber, polypropylene fiber, Improvement in mechanical properties.
Material management in construction – a case studyeSAT Journals
Abstract
The objective of the present study is to understand about all the problems occurring in the company because of improper application
of material management. In construction project operation, often there is a project cost variance in terms of the material, equipments,
manpower, subcontractor, overhead cost, and general condition. Material is the main component in construction projects. Therefore,
if the material management is not properly managed it will create a project cost variance. Project cost can be controlled by taking
corrective actions towards the cost variance. Therefore a methodology is used to diagnose and evaluate the procurement process
involved in material management and launch a continuous improvement was developed and applied. A thorough study was carried
out along with study of cases, surveys and interviews to professionals involved in this area. As a result, a methodology for diagnosis
and improvement was proposed and tested in selected projects. The results obtained show that the main problem of procurement is
related to schedule delays and lack of specified quality for the project. To prevent this situation it is often necessary to dedicate
important resources like money, personnel, time, etc. To monitor and control the process. A great potential for improvement was
detected if state of the art technologies such as, electronic mail, electronic data interchange (EDI), and analysis were applied to the
procurement process. These helped to eliminate the root causes for many types of problems that were detected.
Managing drought short term strategies in semi arid regions a case studyeSAT Journals
Abstract
Drought management needs multidisciplinary action. Interdisciplinary efforts among the experts in various fields of the droughts
prone areas are helpful to achieve tangible and permanent solution for this recurring problem. The Gulbarga district having the total
area around 16, 240 sq.km, and accounts 8.45 per cent of the Karnataka state area. The district has been situated with latitude 17º 19'
60" North and longitude of 76 º 49' 60" east. The district is situated entirely on the Deccan plateau positioned at a height of 300 to
750 m above MSL. Sub-tropical, semi-arid type is one among the drought prone districts of Karnataka State. The drought
management is very important for a district like Gulbarga. In this paper various short term strategies are discussed to mitigate the
drought condition in the district.
Keywords: Drought, South-West monsoon, Semi-Arid, Rainfall, Strategies etc.
Life cycle cost analysis of overlay for an urban road in bangaloreeSAT Journals
Abstract
Pavements are subjected to severe condition of stresses and weathering effects from the day they are constructed and opened to traffic
mainly due to its fatigue behavior and environmental effects. Therefore, pavement rehabilitation is one of the most important
components of entire road systems. This paper highlights the design of concrete pavement with added mono fibers like polypropylene,
steel and hybrid fibres for a widened portion of existing concrete pavement and various overlay alternatives for an existing
bituminous pavement in an urban road in Bangalore. Along with this, Life cycle cost analyses at these sections are done by Net
Present Value (NPV) method to identify the most feasible option. The results show that though the initial cost of construction of
concrete overlay is high, over a period of time it prove to be better than the bituminous overlay considering the whole life cycle cost.
The economic analysis also indicates that, out of the three fibre options, hybrid reinforced concrete would be economical without
compromising the performance of the pavement.
Keywords: - Fatigue, Life cycle cost analysis, Net Present Value method, Overlay, Rehabilitation
Laboratory studies of dense bituminous mixes ii with reclaimed asphalt materialseSAT Journals
Abstract
The issue of growing demand on our nation’s roadways over that past couple of decades, decreasing budgetary funds, and the need to
provide a safe, efficient, and cost effective roadway system has led to a dramatic increase in the need to rehabilitate our existing
pavements and the issue of building sustainable road infrastructure in India. With these emergency of the mentioned needs and this
are today’s burning issue and has become the purpose of the study.
In the present study, the samples of existing bituminous layer materials were collected from NH-48(Devahalli to Hassan) site.The
mixtures were designed by Marshall Method as per Asphalt institute (MS-II) at 20% and 30% Reclaimed Asphalt Pavement (RAP).
RAP material was blended with virgin aggregate such that all specimens tested for the, Dense Bituminous Macadam-II (DBM-II)
gradation as per Ministry of Roads, Transport, and Highways (MoRT&H) and cost analysis were carried out to know the economics.
Laboratory results and analysis showed the use of recycled materials showed significant variability in Marshall Stability, and the
variability increased with the increase in RAP content. The saving can be realized from utilization of recycled materials as per the
methodology, the reduction in the total cost is 19%, 30%, comparing with the virgin mixes.
Keywords: Reclaimed Asphalt Pavement, Marshall Stability, MS-II, Dense Bituminous Macadam-II
Laboratory investigation of expansive soil stabilized with natural inorganic ...eSAT Journals
Abstract
Soil stabilization has proven to be one of the oldest techniques to improve the soil properties. Literature review conducted revealed
that uses of natural inorganic stabilizers are found to be one of the best options for soil stabilization. In this regard an attempt has
been made to evaluate the influence of RBI-81 stabilizer on properties of black cotton soil through laboratory investigations. Black
cotton soil with varying percentages of RBI-81 viz., 0, 0.5, 1, 1.5, 2, and 2.5 percent were studied for moisture density relationships
and strength behaviour of soils. Also the effect of curing period was evaluated as literature review clearly emphasized the strength
gain of soils stabilized with RBI-81 over a period of time. The results obtained shows that the unconfined compressive strength of
specimens treated with RBI-81 increased approximately by 250% for a curing period of 28 days as compared to virgin soil. Further
the CBR value improved approximately by 400%. The studies indicated an increasing trend for soil strength behaviour with
increasing percentage of RBI-81 suggesting its potential applications in soil stabilization.
Influence of reinforcement on the behavior of hollow concrete block masonry p...eSAT Journals
Abstract
Reinforced masonry was developed to exploit the strength potential of masonry and to solve its lack of tensile strength. Experimental
and analytical studies have been carried out to investigate the effect of reinforcement on the behavior of hollow concrete block
masonry prisms under compression and to predict ultimate failure compressive strength. In the numerical program, three dimensional
non-linear finite elements (FE) model based on the micro-modeling approach is developed for both unreinforced and reinforced
masonry prisms using ANSYS (14.5). The proposed FE model uses multi-linear stress-strain relationships to model the non-linear
behavior of hollow concrete block, mortar, and grout. Willam-Warnke’s five parameter failure theory has been adopted to model the
failure of masonry materials. The comparison of the numerical and experimental results indicates that the FE models can successfully
capture the highly nonlinear behavior of the physical specimens and accurately predict their strength and failure mechanisms.
Keywords: Structural masonry, Hollow concrete block prism, grout, Compression failure, Finite element method,
Numerical modeling.
Influence of compaction energy on soil stabilized with chemical stabilizereSAT Journals
Abstract
Increase in traffic along with heavier magnitude of wheel loads cause rapid deterioration in pavements. There is a need to improve
density, strength of soil subgrade and other pavement layers. In this study an attempt is made to improve the properties of locally
available loamy soil using twin approaches viz., i) increasing the compaction of soil and ii) treating the soil with chemical stabilizer.
Laboratory studies are carried out on both untreated and treated soil samples compacted by different compaction efforts. Studies
show that increase in compaction effort results in increase in density of soil. However in soil treated with chemical stabilizer, rate of
increase in density is not significant. The soil treated with chemical stabilizer exhibits improvement in both strength and performance
properties.
Keywords: compaction, density, subgradestabilization, resilient modulus
Geographical information system (gis) for water resources managementeSAT Journals
Abstract
Water resources projects are inherited with overlapping and at times conflicting objectives. These projects are often of varied sizes
ranging from major projects with command areas of millions of hectares to very small projects implemented at the local level. Thus,
in all these projects there is seldom proper coordination which is essential for ensuring collective sustainability.
Integrated watershed development and management is the accepted answer but in turn requires a comprehensive framework that can
enable planning process involving all the stakeholders at different levels and scales is compulsory. Such a unified hydrological
framework is essential to evaluate the cause and effect of all the proposed actions within the drainage basins.
The present paper describes a hydrological framework developed in the form of a Hydrologic Information System (HIS) which is
intended to meet the specific information needs of the various line departments of a typical State connected with water related aspects.
The HIS consist of a hydrologic information database coupled with tools for collating primary and secondary data and tools for
analyzing and visualizing the data and information. The HIS also incorporates hydrological model base for indirect assessment of
various entities of water balance in space and time. The framework would be maintained and updated to reflect fully the most
accurate ground truth data and the infrastructure requirements for planning and management.
Keywords: Hydrological Information System (HIS); WebGIS; Data Model; Web Mapping Services
Forest type mapping of bidar forest division, karnataka using geoinformatics ...eSAT Journals
Abstract
The study demonstrate the potentiality of satellite remote sensing technique for the generation of baseline information on forest types
including tree plantation details in Bidar forest division, Karnataka covering an area of 5814.60Sq.Kms. The Total Area of Bidar
forest division is 5814Sq.Kms analysis of the satellite data in the study area reveals that about 84% of the total area is Covered by
crop land, 1.778% of the area is covered by dry deciduous forest, 1.38 % of mixed plantation, which is very threatening to the
environmental stability of the forest, future plantation site has been mapped. With the use of latest Geo-informatics technology proper
and exact condition of the trees can be observed and necessary precautions can be taken for future plantation works in an appropriate
manner
Keywords:-RS, GIS, GPS, Forest Type, Tree Plantation
Factors influencing compressive strength of geopolymer concreteeSAT Journals
Abstract
To study effects of several factors on the properties of fly ash based geopolymer concrete on the compressive strength and also the
cost comparison with the normal concrete. The test variables were molarities of sodium hydroxide(NaOH) 8M,14M and 16M, ratio of
NaOH to sodium silicate (Na2SiO3) 1, 1.5, 2 and 2.5, alkaline liquid to fly ash ratio 0.35 and 0.40 and replacement of water in
Na2SiO3 solution by 10%, 20% and 30% were used in the present study. The test results indicated that the highest compressive
strength 54 MPa was observed for 16M of NaOH, ratio of NaOH to Na2SiO3 2.5 and alkaline liquid to fly ash ratio of 0.35. Lowest
compressive strength of 27 MPa was observed for 8M of NaOH, ratio of NaOH to Na2SiO3 is 1 and alkaline liquid to fly ash ratio of
0.40. Alkaline liquid to fly ash ratio of 0.35, water replacement of 10% and 30% for 8 and 16 molarity of NaOH and has resulted in
compressive strength of 36 MPa and 20 MPa respectively. Superplasticiser dosage of 2 % by weight of fly ash has given higher
strength in all cases.
Keywords: compressive strength, alkaline liquid, fly ash
Experimental investigation on circular hollow steel columns in filled with li...eSAT Journals
Abstract
Composite Circular hollow Steel tubes with and without GFRP infill for three different grades of Light weight concrete are tested for
ultimate load capacity and axial shortening , under Cyclic loading. Steel tubes are compared for different lengths, cross sections and
thickness. Specimens were tested separately after adopting Taguchi’s L9 (Latin Squares) Orthogonal array in order to save the initial
experimental cost on number of specimens and experimental duration. Analysis was carried out using ANN (Artificial Neural
Network) technique with the assistance of Mini Tab- a statistical soft tool. Comparison for predicted, experimental & ANN output is
obtained from linear regression plots. From this research study, it can be concluded that *Cross sectional area of steel tube has most
significant effect on ultimate load carrying capacity, *as length of steel tube increased- load carrying capacity decreased & *ANN
modeling predicted acceptable results. Thus ANN tool can be utilized for predicting ultimate load carrying capacity for composite
columns.
Keywords: Light weight concrete, GFRP, Artificial Neural Network, Linear Regression, Back propagation, orthogonal
Array, Latin Squares
Experimental behavior of circular hsscfrc filled steel tubular columns under ...eSAT Journals
Abstract
This paper presents an outlook on experimental behavior and a comparison with predicted formula on the behaviour of circular
concentrically loaded self-consolidating fibre reinforced concrete filled steel tube columns (HSSCFRC). Forty-five specimens were
tested. The main parameters varied in the tests are: (1) percentage of fiber (2) tube diameter or width to wall thickness ratio (D/t
from 15 to 25) (3) L/d ratio from 2.97 to 7.04 the results from these predictions were compared with the experimental data. The
experimental results) were also validated in this study.
Keywords: Self-compacting concrete; Concrete-filled steel tube; axial load behavior; Ultimate capacity.
Evaluation of punching shear in flat slabseSAT Journals
Abstract
Flat-slab construction has been widely used in construction today because of many advantages that it offers. The basic philosophy in
the design of flat slab is to consider only gravity forces; this method ignores the effect of punching shear due to unbalanced moments
at the slab column junction which is critical. An attempt has been made to generate generalized design sheets which accounts both
punching shear due to gravity loads and unbalanced moments for cases (a) interior column; (b) edge column (bending perpendicular
to shorter edge); (c) edge column (bending parallel to shorter edge); (d) corner column. These design sheets are prepared as per
codal provisions of IS 456-2000. These design sheets will be helpful in calculating the shear reinforcement to be provided at the
critical section which is ignored in many design offices. Apart from its usefulness in evaluating punching shear and the necessary
shear reinforcement, the design sheets developed will enable the designer to fix the depth of flat slab during the initial phase of the
design.
Keywords: Flat slabs, punching shear, unbalanced moment.
Evaluation of performance of intake tower dam for recent earthquake in indiaeSAT Journals
Abstract
Intake towers are typically tall, hollow, reinforced concrete structures and form entrance to reservoir outlet works. A parametric
study on dynamic behavior of circular cylindrical towers can be carried out to study the effect of depth of submergence, wall thickness
and slenderness ratio, and also effect on tower considering dynamic analysis for time history function of different soil condition and
by Goyal and Chopra accounting interaction effects of added hydrodynamic mass of surrounding and inside water in intake tower of
dam
Key words: Hydrodynamic mass, Depth of submergence, Reservoir, Time history analysis,
Evaluation of operational efficiency of urban road network using travel time ...eSAT Journals
Abstract
Efficiency of the road network system is analyzed by travel time reliability measures. The study overlooks on an important measure of
travel time reliability and prioritizing Tiruchirappalli road network. Traffic volume and travel time were collected using license plate
matching method. Travel time measures were estimated from average travel time and 95th travel time. Effect of non-motorized vehicle
on efficiency of road system was evaluated. Relation between buffer time index and traffic volume was created. Travel time model has
been developed and travel time measure was validated. Then service quality of road sections in network were graded based on
travel time reliability measures.
Keywords: Buffer Time Index (BTI); Average Travel Time (ATT); Travel Time Reliability (TTR); Buffer Time (BT).
Estimation of surface runoff in nallur amanikere watershed using scs cn methodeSAT Journals
Abstract
The development of watershed aims at productive utilization of all the available natural resources in the entire area extending from
ridge line to stream outlet. The per capita availability of land for cultivation has been decreasing over the years. Therefore, water and
the related land resources must be developed, utilized and managed in an integrated and comprehensive manner. Remote sensing and
GIS techniques are being increasingly used for planning, management and development of natural resources. The study area, Nallur
Amanikere watershed geographically lies between 110 38’ and 110 52’ N latitude and 760 30’ and 760 50’ E longitude with an area of
415.68 Sq. km. The thematic layers such as land use/land cover and soil maps were derived from remotely sensed data and overlayed
through ArcGIS software to assign the curve number on polygon wise. The daily rainfall data of six rain gauge stations in and around
the watershed (2001-2011) was used to estimate the daily runoff from the watershed using Soil Conservation Service - Curve Number
(SCS-CN) method. The runoff estimated from the SCS-CN model was then used to know the variation of runoff potential with different
land use/land cover and with different soil conditions.
Keywords: Watershed, Nallur watershed, Surface runoff, Rainfall-Runoff, SCS-CN, Remote Sensing, GIS.
Estimation of morphometric parameters and runoff using rs & gis techniqueseSAT Journals
Abstract
Land and water are the two vital natural resources, the optimal management of these resources with minimum adverse environmental
impact are essential not only for sustainable development but also for human survival. Satellite remote sensing with geographic
information system has a pragmatic approach to map and generate spatial input layers of predicting response behavior and yield of
watershed. Hence, in the present study an attempt has been made to understand the hydrological process of the catchment at the
watershed level by drawing the inferences from moprhometric analysis and runoff. The study area chosen for the present study is
Yagachi catchment situated in Chickamaglur and Hassan district lies geographically at a longitude 75⁰52’08.77”E and
13⁰10’50.77”N latitude. It covers an area of 559.493 Sq.km. Morphometric analysis is carried out to estimate morphometric
parameters at Micro-watershed to understand the hydrological response of the catchment at the Micro-watershed level. Daily runoff
is estimated using USDA SCS curve number model for a period of 10 years from 2001 to 2010. The rainfall runoff relationship of the
study shows there is a positive correlation.
Keywords: morphometric analysis, runoff, remote sensing and GIS, SCS - method
-
Effect of variation of plastic hinge length on the results of non linear anal...eSAT Journals
Abstract The nonlinear Static procedure also well known as pushover analysis is method where in monotonically increasing loads are applied to the structure till the structure is unable to resist any further load. It is a popular tool for seismic performance evaluation of existing and new structures. In literature lot of research has been carried out on conventional pushover analysis and after knowing deficiency efforts have been made to improve it. But actual test results to verify the analytically obtained pushover results are rarely available. It has been found that some amount of variation is always expected to exist in seismic demand prediction of pushover analysis. Initial study is carried out by considering user defined hinge properties and default hinge length. Attempt is being made to assess the variation of pushover analysis results by considering user defined hinge properties and various hinge length formulations available in literature and results compared with experimentally obtained results based on test carried out on a G+2 storied RCC framed structure. For the present study two geometric models viz bare frame and rigid frame model is considered and it is found that the results of pushover analysis are very sensitive to geometric model and hinge length adopted. Keywords: Pushover analysis, Base shear, Displacement, hinge length, moment curvature analysis
Effect of use of recycled materials on indirect tensile strength of asphalt c...eSAT Journals
Abstract
Depletion of natural resources and aggregate quarries for the road construction is a serious problem to procure materials. Hence
recycling or reuse of material is beneficial. On emphasizing development in sustainable construction in the present era, recycling of
asphalt pavements is one of the effective and proven rehabilitation processes. For the laboratory investigations reclaimed asphalt
pavement (RAP) from NH-4 and crumb rubber modified binder (CRMB-55) was used. Foundry waste was used as a replacement to
conventional filler. Laboratory tests were conducted on asphalt concrete mixes with 30, 40, 50, and 60 percent replacement with RAP.
These test results were compared with conventional mixes and asphalt concrete mixes with complete binder extracted RAP
aggregates. Mix design was carried out by Marshall Method. The Marshall Tests indicated highest stability values for asphalt
concrete (AC) mixes with 60% RAP. The optimum binder content (OBC) decreased with increased in RAP in AC mixes. The Indirect
Tensile Strength (ITS) for AC mixes with RAP also was found to be higher when compared to conventional AC mixes at 300C.
Keywords: Reclaimed asphalt pavement, Foundry waste, Recycling, Marshall Stability, Indirect tensile strength.
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
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Water scarcity is the lack of fresh water resources to meet the standard water demand. There are two type of water scarcity. One is physical. The other is economic water scarcity.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
RAT: Retrieval Augmented Thoughts Elicit Context-Aware Reasoning in Long-Hori...
Properties of concrete incorporated with ggbs
1. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
_______________________________________________________________________________________________
Volume: 05 Issue: 08 | Aug-2016, Available @ http://ijret.esatjournals.org 275
PROPERTIES OF CONCRETE INCORPORATED WITH GGBS
Ishwar Chandra Thakur1, N.Kisku2, J.P.Singh3, Sheo Kumar4
1
M.Tech. Scholar, Structural Engineering, Civil Engineering Department, B.I.T. Sindri, Jharkhand, India
2
Assistant Professor, Civil Engineering Department, B.I.T. Sindri, Jharkhand, India
3
Associate Professor, Civil Engineering Department, B.I.T. Sindri, Jharkhand, India
3
Associate Professor, Civil Engineering Department, B.I.T. Sindri, Jharkhand, India
Abstract
Throughout the world, the most widely used construction material is concrete. It is the second most consumed substance on the
earth after water. As concrete being used for construction of most of the buildings, bridges etc., it has been labelled as the
backbone to the infrastructure development of nation. It is commonly made by mixing Portland cement with sand, crushed rock
and water. It is very clear that among the all components, aggregate and water is largely available material in India at very low
cost. As cement is comparatively high cost it would be advisable to use other locally available industrial and agricultural w aste
material to replace the cement partially. Ground Granulated Blast-furnace Slag (GGBS) is a non-metallic and non-hazardous
waste material of Iron Industry. Therefore the minimization of this waste material without a harmful effect on nature has a vital
importance.The present work focused on the utilization of GGBS in concrete which can be suitably used under the Indian
conditions.For thispurpose, the various tests on properties of green and hardened concrete have been performed. The properties
of green concrete have been analyzed by workability of concrete in terms of slump value whereas the properties of hardened
concrete have been analyzed in terms of mechanical and physical properties of concrete. The mechanical properties of hardened
concrete include the compressive strength, flexural strength and split tensile strength whereas physical properties includesthe dry
& moist density and water absorption of hardened concrete. On the basis of present work we found that GGBS in concrete
improves workability,compressive strength,flexural strength, split tensile strength and decreases the density & water absorption
characteristics of hardened concrete. As a result the cost of concrete decreases. Also GGBS leads to the significant reduction in
the quantity ofcement which enablesthe reduction in CO2 emission and reduction in energy consumption in production of cement.
Keywords: GGBS, cement, fine and coarse aggregate and concrete
----------------------------------------------------------------------***--------------------------------------------------------------------
1. INTRODUCTION
Ground granulated blast furnace slag (GGBS) is a
sustainable material which helps in greener environment by
reducing the energy consumption and carbon dioxide (CO2)
gas emission. Only cement industry accounts for around 5%
global carbon dioxide emissions. It emits CO2 gases both
directly and indirectly. Direct emission of CO2 occurs
through the chemical process called calcination whereas
burning of fossil fuels to heat the kiln indirectly results in
CO2 gas emission. It has been reported that the manufacture
of one tonne of Portland cement would require
approximately 1.5 tonnes of mineral extractions together
with 5000 MJ of energy, and would generate 0.95 tonne of
CO2 equivalent [18]. As GGBS is a by-product of iron
manufacturing industry, it is reported that the production of
one tonne of GGBS would generate only about 0.07 tonne of
CO2 equivalent and consume only about 1300 MJ of energy
[18].
GGBS is obtained from iron manufacturing industries, when
Silicate and aluminate impurities from ore and coke are
combined with flux lowered the viscosity of slag. Molten
iron is then tapped off, the remaining molten slag, which
consists of mainly siliceous and aluminous residue, is then
water-quenched rapidly below 800oC in order to prevent the
crystallization of merwinite and melilite, resulting in the
formation of a glassy granulate. This glassy granulate is then
dried and grounded into fine powder, which is known as
ground granulated blast furnace slag (GGBS). The main
component of blast furnace slag are CaO (30-50%), SiO2
(30-40%), Al2O3 (8 -24%) and MgO (1-18%) which is close
to the chemical composition of portland cement. It is
commonly used in combination with portland cement in
concrete for many applications. Concrete made with GGBS
has many advantages, including improved strength
[5,6,13,16], durability [3,9,13], workability [1,2,19],
economic and environmental benefits [9]. The only
drawback in the use of GGBS concrete is that its strength
development is considerably slower under the standard
curing conditions than that of portland cement concrete,
although the ultimate strength is higher for the same water–
binder ratio [2, 3, 16]. In the construction of large structural
concrete elements where heat dissipation is slow, there can
be a significant rise in temperature within the first few days
after casting due to the exothermic reaction of the binder [4].
The main objective of the present work is to develop a high
performance concrete (HPC) by the use of GGBS.
Therefore, the experimental program has been undertaken
with the objectives to check the compressive, tensile and
flexural strength of concrete grade M30. In addition to this
the density and water absorption characteristics of hardened
concrete was also evaluated. In whole of the experimental
works cement was partially replaced by 10%, 20%, 30%,
40%, 50%, 60% and 70% GGBS.
2. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
_______________________________________________________________________________________________
Volume: 05 Issue: 08 | Aug-2016, Available @ http://ijret.esatjournals.org 276
2. MATERIAL USED
The materials used in experimental investigation include:
2.1 Cement
Ordinary Portland cement of 43-grade conforming to IS:
8112-1989 was used in this project under the brand name
Reliance Cement.
2.2 GGBS
Ground Granulated Blast-furnace Slag (GGBS) used in this
project is the mixed slag from Tata Steel, Jamshedpur and
Electro Steel Chandankyari, Dhanbad, Jharkhand. The
physical & mechanical properties of cement and GGBS are
given in table 1.
Table-1: Physical & mechanical properties of cement&
GGBS
Test Cement GGBS
Color Gray Off white
Consistency 25% 33%
Soundness 4 mm --
Initial setting time 110 minutes --
Final setting time 290 minutes --
Specific gravity 3.13 2.95
Fineness (sieving on 90µm) 8.5 % 0%
Fineness (Blain’s air
permeability)
302 m2/kg 320 m2/kg
Bulk density 1.48 gm/cm3 1.29 gm/cm3
Compressive strength
3days
7days
28 days
N/mm2
23.33
34.33
46.18
--
--
--
Chemical Properties
The test for Chemical Properties of Cement & GGBS has
been performed using X-Ray Fluorescence Machine at ACC
Plant Sindri. The result of which are given in table 2.
Table-2: Chemical Properties of Cement & GGBS
Chemical Composition Cement
%
GGBS
%CaO 63.20 35.27
SiO2 21.06 34.72
Al2O3 5.72 19.11
MgO 1.90 8.46
Fe2O3 4.38 0.5
SO3 2.04 0.18
Na2O 0.25 0.16
K2O 0.87 0.58
Cl 0.01 0.01
TiO2 0.40 0.65
P2O5 0.09 0.01
Mn2O3 0.07 0.14 (MnO)
Glass Content -- 95
2.3 Fine and Coarse Aggregate
The aggregate passing through the sieve size 4.75mm is
termed as fine aggregate and those which retained on 4.75
mm sieve is termed as coarse aggregate. River sand obtained
from Barakar River were used as fine aggregate whereas
mechanically crushed angular coarse aggregate from a
quarry situated in Baliyapur, Dhanbad were used coarse
aggregate. All the properties of aggregates were tested in
accordance with IS: 2386(part I to IV) -1963 and the results
obtained were confirmed with IS 383-1970. Table 3
summarizes the properties of fine and coarse aggregate.
Table-3: Properties of fine and coarse aggregate
Test
Fine
Aggregate
Coarse Aggregate
Zone/type II Crushed angular
Free (surface)
moisture
0.60% 0.20%
Water
Absorption
1.10% 0.45 %
Fineness
Modulus
2.78
7.25(fraction I- 20mm)
6.29(fraction II- 10mm)
Specific gravity 2.62 2.89
Unit
weight(Compact)
1.63gm/cc 1.90gm/cc
Unit
weight(Loose)
1.58gm/cc 1.67gm/cc
2.4 Water
Water which is suitable for drinking is satisfactory for use in
concrete. It was tested and checked for permissible limit as
per the IS: 3025 and IS: 456-2000. Properties of water as
obtained are given in table 4.
Table-4: Properties of water
Solids Result Permissible Limit
Organic 55 mg/l 200 mg/l
Inorganic 1200 mg/l 3000 mg/l
Sulphate(SO3) 75 mg/l 400 mg/l
Chloride (Cl) 1150 mg/l
2000 mg/l for P.C.C.
500 mg/l for R.C.C.
Suspended matter 510 mg/l 2000 mg/l
pH 6.8 > 6
3. EXPERIMENTAL PROCEDURE
Experimental procedure has been described in the following
paragraphs.
3.1 Mix Design
Proportioning of concrete mix for M30 grade of concrete
has been achieved by concrete mix design as per IS
10262:2009. Composition of constituent material per cubic
meter of concrete for different batches is given in table 5.
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Table-5: Proportioning of the concrete mix
Mix
Desig
nation
Cem
ent
%
GG
BS
%
Wate
r
(Kg)
Cem
ent
(Kg)
GGB
S
(Kg)
FA
(Kg)
CA
(Kg)
R0 100 0 188 425 0 653 1236
R10 90 10 188 383 42 653 1236
R20 80 20 188 340 85 653 1236
R30 70 30 188 298 127 653 1236
R40 60 40 188 255 170 653 1236
R50 50 50 188 213 212 653 1236
R60 40 60 188 170 255 653 1236
R70 30 70 188 127 298 653 1236
3.3 Mixing Technique
Hand mixing technique has been adopted in the whole
experimental work at temperature of 27° ± 2°C and relative
humidity 90 percent. In each batch 6 specimen of cube of
dimension 150mm x 150mm x 150mm, 6 specimen of
cylinder of dimension 150mm diameter x 300mm height,
and 3 specimen of beam of dimension 100mm x 100mm x
500mm has been made.
3.4 Properties of Fresh Concrete
The property of fresh concrete has been assessed by
workability in terms of slump value. The test of which has
been performed in accordance with IS 1199:1959. The
results of which are given below in table 6.
Table-6: Slump test of concrete
Mix
type
R0 R10 R20 R30 R40 R50 R60 R70
Slump
(mm)
60 63 65 68 70 73 71 67
From above table, it is observed that the slump value of
concrete increases as the percentage of GGBS increases up
to 50% replacement and then decreases. The increase in
slump value is due to the higher smoothness and fineness of
slag increases the entrainment of air in the matrix,
subsequently increasing the volume of paste.
3.5 Properties of Hardened Concrete
Hardened concrete properties have been analyzed in the
terms of compressive, flexural & split tensile strength, dry &
moist density and water absorption. As the development of
strength is time dependent hence these tests has been
performed after a different curing period. One sample each
of cube and cylinder has been tested at 7 and 28 days for
compressive strength and split tensile strength of concrete
respectively while the beam has been tested after curing
period of 28 days for flexural strength of concrete.
Compressive Strength
This test was performed in accordance with IS 516:1959 on
the cube of size 150mm x 150mm x 150mm. The result of
which is given below in table 7.
Table-7: Compressive strength of concrete
Mix
type
7 days 28 days
Avg.
Compressiv
e Strength
(N/mm2)
%
variatio
ns over
R0
Avg.
Compressiv
e Strength
(N/mm2)
%
variations
over R0
R0 26.22 0 38.74 0
R10 25.04 -4.50 40.30 +4.03
R20 24.00 -8.47 41.78 +7.84
R30 23.56 -10.14 43.11 +11.28
R40 23.26 -11.29 47.26 +21.99
R50 22.96 -12.43 49.85 +28.68
R60 21.26 -18.92 47.63 +22.95
R70 19.11 -27.12 44.22 +14.15
Graph showing the variation of compressive strength of
concrete with different percentage of GGBS is presented
below in figure 1.
Fig-1: Compressive strength of concrete
From the above fig., it is observed that compressive strength
of concrete with increasing percentage of GGBS decreases
after 7days but increases after 28 days with optimum
percentage of 50% replacement by GGBS. It indicates the
slower rate of reaction of matrix by incorporation of GGBS.
At optimum percentage of GGBS the compressive strength
is 28.68% higher than that of conventional cement concrete.
Split Tensile Strength
This test was performed in accordance with IS 5816:1999 on
the cylinder of diameter 150mm and height 300mm. The
result of which is given below in table 8.
0
5
10
15
20
25
30
35
40
45
50
R0 R10 R20 R30 R40 R50 R60 R70
Compressivestrength
(N/mm2)
Mix Type
7 days 28 days
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Table-8: Split Tensile Strength of concrete
Mix
type
7 days 28 days
Split tensile
Strength
(N/mm2)
%
variation
s over R0
Split tensile
Strength
(N/mm2)
%
variations
over R0
R0 2.64 0.00 2.93 0.00
R10 2.48 -6.25 3.09 +5.64
R20 2.41 -8.93 3.21 +9.68
R30 2.26 -14.29 3.28 +12.10
R40 1.82 -31.25 3.42 +16.94
R50 1.72 -34.82 3.51 +20.16
R60 1.51 -42.86 3.59 +22.58
R70 1.37 -44.76 3.47 +12.21
Graph showing the variation of split tensile strength of
concrete with different percentage of GGBS is presented in
figure 2.
Fig-2: Split tensile strength of concrete
From the fig., it is observed that split tensile strength of
concrete with increasing percentage of GGBS decreases
after 7days but increases after 28days with optimum
percentage of 60% replacement by GGBS. It indicates the
slower rate of reaction of matrix by incorporation of GGBS.
At optimum percentage of GGBS the Split tensile strength is
22.58% higher than that of conventional cement concrete.
Flexural Strength
This test was performed in accordance with IS 516:1959 on
the beam of dimension 100mm x 100mm x 500mm which
were tested at 28 days curing period and average of which
were found out. The result of which is given in table 9.
Table-9: Flexural Strength on concrete
Mix type
28 days
Avg. Flexural
Strength (N/mm2)
% variations over R0
R0 3.87 0.00
R10 4.18 +8.01
R20 4.36 +12.66
R30 4.39 +13.44
R40 4.63 +19.64
R50 4.92 +27.13
R60 4.73 +22.22
R70 4.39 +13.44
Graph showing the variation of flexural strength of concrete
with different percentage of GGBS is given in figure 3.
Fig-3: Flexural strength of concrete
From the graph, it may be observed that the flexural strength
of concrete with increasing percentage of GGBS increases
after 28 days with optimum percentage of 50% replacement
by GGBS. At this stage of replacement of cement with
GGBS flexural strength is 27.13% higher than that of
conventional cement concrete.
Dry and Moist Density
Dry & moist density of concrete has been determined in
accordance with ISO: 6275-1982 and NT BUILD 200. The
value of which are given in table 10.
Table-10: Dry and moist density of hardened concrete
Mix type
Dry Density Moist Density
Avg.
density
(gm/cm3)
%
variation
over R0
Avg.
density
(gm/cm3)
%
variation
over R0
R0 2.71 0.00 2.84 0.00
R10 2.65 -2.41 2.75 -3.14
R20 2.63 -3.09 2.73 -3.83
R30 2.51 -7.63 2.60 -8.41
R40 2.48 -8.57 2.56 -9.59
R50 2.45 -9.72 2.51 -11.62
R60 2.43 -10.31 2.48 -12.43
R70 2.39 -12.10 2.43 -14.36
Graph showing the variation of dry and moist density of
hardened concrete with different percentage of GGBS is
presented in figure 4.
0
1
2
3
4
R0 R10 R20 R30 R40 R50 R60 R70
Splittensilestrength
(N/mm2)
Mix type
7 days 28 days
0
1
2
3
4
5
6
R0 R10 R20 R30 R40 R50 R60 R70
Flexuralstrength(N/mm2)
Mix Type
28 days
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Fig-4: Dry and moist density of hardened concrete
From the above fig., it is observed that the dry and moist
density of concrete decreases as the percentage of GGBS
increases. From the above results, it is concluded that the
GGBS can be used to produce the concrete of lower density.
Water Absorption
Water absorption of concrete has been determined in
accordance with ISO: 6275-1982 and NT BUILD 200. The
value of which are given in table 11.
Table-11: Water Absorption of hardened concrete
Mix type Avg. water absorption % % variation over R0
R0 4.50 0.00
R10 3.72 -17.37
R20 3.69 -17.96
R30 3.61 -19.75
R40 3.35 -25.66
R50 2.30 -48.96
R60 2.04 -54.74
R70 1.81 -59.79
Graph showing the variation of water absorption of
hardened concrete with different percentage of GGBS is
presented in figure 5.
Fig-5: Water absorption of hardened concrete
From the above fig., it is observed that the water absorption
of concrete decreases as the percentage of GGBS increases.
From this result, it is concluded that the GGBS can be used
to improve the water impermeability characteristics of
structure. Hence the corrosion of reinforcement may be
retarded & durability of R.C.C. structure may be increased.
3.6 Cost Analysis
Material cost estimation includes cost of water, cement, fine
aggregate and coarse aggregate for a particular design mix.
As per the mix design calculation we obtained that the
weight of water, cement, fine aggregate and coarse
aggregate are 188 kg, 425 kg, 653 kg and 1236 kg
respectively for 1 m3 of dry concrete. As the water is largely
available material in India hence its cost can be neglected.
Present study shows that the replacement of cement by
GGBS can be done as much as 60% (by weight). Analysis
of the cost of concrete with and without GGBS is given
below in table 12.
Table-12: Cost of material per cubic meter of concrete
Item name Rate
Conventional concrete GGBS concrete
% saving
Quantity Cost Quantity Cost
GGBS ₹ 0.50 Per kg --- --- 255 kg ₹ 128
40.82 %
Cement ₹ 400 per bag 8.50 bags ₹ 3400 3.40 bags ₹ 1360
Fine aggregate ₹ 860 per m3 0.249 m3 ₹ 214 0.249 m3 ₹ 214
Coarse aggregate ₹ 2500 per m3 0.428 m3 ₹ 1070 0.428 m3 ₹ 1070
∑=₹ 4684 ∑=₹ 2772
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
R0 R10 R20 R30 R40 R50 R60 R70
Density(gm/cm3)
Mix Type
dry density
moist density
0
1
2
3
4
5
R0 R10 R20 R30 R40 R50 R60 R70
WaterAbsorption%
Mix Type
water absorption
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From the above table, we observe that the use of GGBS in
concrete saves money up to 40.82% over the conventional
cement concrete. This is a significant saving of money.
Hence GGBS concrete is more economical.
4. CONCLUSION
1. Slump value of concrete increases as the percentage of
GGBS increases up to 50% replacement and then
decreases. The increase in slump value is due to the
higher smoothness and fineness of slag increases the
entrainment of air in the matrix, subsequently
increasing the volume of paste.
2. Compressive strength of concrete with increasing
percentage of GGBS decreases after 7days but increases
after 28 days with optimum percentage of 50%
replacement by GGBS. It indicates the slower rate of
reaction of matrix by incorporation of GGBS. At
optimum percentage of GGBS the compressive strength
is 28.68% higher than that of conventional cement
concrete.
3. Split tensile strength of concrete with increasing
percentage of GGBS decreases after 7days but increases
after 28days with optimum percentage of 60%
replacement by GGBS. It indicates the slower rate of
reaction of matrix by incorporation of GGBS. At
optimum percentage of GGBS the Split tensile strength
is 22.58% higher than that of conventional cement
concrete.
4. Flexural strength of concrete with increasing percentage
of GGBS increases after 28 days with optimum
percentage of 50% replacement by GGBS. At this stage
of replacement of cement with GGBS flexural strength
is 27.13% higher than that of conventional cement
concrete.
5. Dry and moist density of concrete decreases as the
percentage of GGBS increases. From the above results,
it is concluded that the GGBS can be used to produce
the concrete of lower density.
6. Water absorption of concrete decreases as the
percentage of GGBS increases. From this results, it is
concluded that the GGBS can be used to improve the
water impermeability characteristics of structure.Hence
the corrosion of reinforcement may be retarded &
durability of R.C.C. structure may be increased.
7. Use of GGBS in concrete saves money up to 40.82%
over the conventional cement concrete. This is a
significant saving of money. Hence GGBS concrete is
more economical.
ACKNOWLEDGEMENT
The author is thankful to Dr. V. Pandey, the Head of Civil
Engineering Department, for their valuable suggestion and
encouragement at various stages of the project work. We are
also thankful to Mr. Manoj Kumar Giri, Manager and
Quality Head, ACC Plant Sindri for their guidance and co-
operation to conduct various tests at their modern
technology laboratory.
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