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.
plastic waste recycling for road constructionMahaswari Jogia
Plastic is boon for humans. As it is cheap, easy to transport, etc.
In a Survey it was found that a plastic can be long lasting more than 4000 years. It was good to know that life of plastic is more than any other packaging material.
Plastics, are versatile packing materials and commonly used by man but they become problem to the environment.
India consumption of Plastics will grow 178 lakh tonne by 2018* and is set to be the third largest consumer of plastics in the world.
Utilization of Waste Plastic in Bituminous Mixes for Road Construction Vijay V Nair
The rapid rate of urbanization in India has led to increasing plastic waste generation. This increase has resulted in a large amount of plastic waste, particularly plastic bags and PET bottles, being littered on the landscape of India. In this context, research has been carried out to contribute to the development of efficient policy approaches on plastic waste in India. Few policies have been enforced by the government to address the acute problem of littering in the country. The purpose of this project is to investigate the possibility of using Polyethylene Terephthalate as polymer additives in Bituminous Mix. The characteristics of PET-modified bituminous mix is obtained by fix mixing temperature, was investigated. The binders were prepared by mixing the PET in 2%, 4%, 6%, 8% and 10% (by the weight of optimum bitumen) with 80/100 penetration grade bitumen at temperature of 200-220 ºC. It may be inferred that PET-modified bituminous binders provide better stability when compared to conventional binders. Using PET-modified bituminous mix also contribute to the recirculation of plastic waste, as well as to the protection of the environment.
Please use the below for Citation: Mahendra, S.P., Kumar, N.S., Prasad, K.V.R., Vijay, V., Rakesh, S.G., Likith, T., Yogesh, B.P., 2013. Study on Utilization of Waste Plastic in Bituminous Mixes for Road Construction. Proceedings of the International Conference on Futuristic Innovations & Developments in Civil Engineering (ICFiDCe ’13), Mepco Schlenk Engineering College, Sivakasi. [ISBN: 978-93-80624-88-4]
Location: Sivakasi
Event Date: Apr 18, 2013
Organization: Mepco Schlenk Engineering College
Publication Name: Proceedings of the International Conference on Futuristic Innovations & Developments in Civil Engineering (ICFiDCe ’13)
Conference End Date: Apr 20, 2013
Research Interests: Stability, Recycling of plastics waste, MSW, Plastic waste, Polyethylene terephthalate, and Bituminous Mixtures
Follow the link for accessing full paper:
https://www.academia.edu/9686909/Utilization_of_Waste_Plastic_in_Bituminous_Mixes_for_Road_Construction
Pros and cons of plastic roads are explained. This will be more economical,easily assembled and dismantled and reduction in construction and maintenance time.The basic process for different type of construction of plastic roads is explained.Case study on plastic roads in Jamshedpur and Bangalore has been discussed. Glimpse of "Plastic Of Man Of India" has been briefed.
Experimental investigations on the performance of bituminous mixes with recla...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.
plastic waste recycling for road constructionMahaswari Jogia
Plastic is boon for humans. As it is cheap, easy to transport, etc.
In a Survey it was found that a plastic can be long lasting more than 4000 years. It was good to know that life of plastic is more than any other packaging material.
Plastics, are versatile packing materials and commonly used by man but they become problem to the environment.
India consumption of Plastics will grow 178 lakh tonne by 2018* and is set to be the third largest consumer of plastics in the world.
Utilization of Waste Plastic in Bituminous Mixes for Road Construction Vijay V Nair
The rapid rate of urbanization in India has led to increasing plastic waste generation. This increase has resulted in a large amount of plastic waste, particularly plastic bags and PET bottles, being littered on the landscape of India. In this context, research has been carried out to contribute to the development of efficient policy approaches on plastic waste in India. Few policies have been enforced by the government to address the acute problem of littering in the country. The purpose of this project is to investigate the possibility of using Polyethylene Terephthalate as polymer additives in Bituminous Mix. The characteristics of PET-modified bituminous mix is obtained by fix mixing temperature, was investigated. The binders were prepared by mixing the PET in 2%, 4%, 6%, 8% and 10% (by the weight of optimum bitumen) with 80/100 penetration grade bitumen at temperature of 200-220 ºC. It may be inferred that PET-modified bituminous binders provide better stability when compared to conventional binders. Using PET-modified bituminous mix also contribute to the recirculation of plastic waste, as well as to the protection of the environment.
Please use the below for Citation: Mahendra, S.P., Kumar, N.S., Prasad, K.V.R., Vijay, V., Rakesh, S.G., Likith, T., Yogesh, B.P., 2013. Study on Utilization of Waste Plastic in Bituminous Mixes for Road Construction. Proceedings of the International Conference on Futuristic Innovations & Developments in Civil Engineering (ICFiDCe ’13), Mepco Schlenk Engineering College, Sivakasi. [ISBN: 978-93-80624-88-4]
Location: Sivakasi
Event Date: Apr 18, 2013
Organization: Mepco Schlenk Engineering College
Publication Name: Proceedings of the International Conference on Futuristic Innovations & Developments in Civil Engineering (ICFiDCe ’13)
Conference End Date: Apr 20, 2013
Research Interests: Stability, Recycling of plastics waste, MSW, Plastic waste, Polyethylene terephthalate, and Bituminous Mixtures
Follow the link for accessing full paper:
https://www.academia.edu/9686909/Utilization_of_Waste_Plastic_in_Bituminous_Mixes_for_Road_Construction
Pros and cons of plastic roads are explained. This will be more economical,easily assembled and dismantled and reduction in construction and maintenance time.The basic process for different type of construction of plastic roads is explained.Case study on plastic roads in Jamshedpur and Bangalore has been discussed. Glimpse of "Plastic Of Man Of India" has been briefed.
Experimental investigations on the performance of bituminous mixes with recla...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.
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
Experimental study on strength characteristics of concrete with recycled aggr...eSAT Journals
Abstract
The objective of providing eco-friendly concrete is gaining hike in the global construction industry. The depleting resources have made the researchers to focus on sustainable development in all areas and more particularly in concrete production, due to the high rate of growth of industries and their infrastructure development, which increase the rate of consumption of concrete. The practice of recycling of demolished concrete for use in sub grades has already been set up. However a new concrete that is produced with such a recycled concrete seems to have higher porosity, lower strength and modulus of elasticity when compared to normal conventional concrete. Some of the earlier studies have attempted to improve the recycled material so as to reduce its high porosity. From review of literature it is found that studies under rural roads using recycled aggregates was done. This project deals with the use of recycled aggregates for rigid pavements replacing natural aggregates in rural roads. The tests are conducted for various proportion mix of Recycled aggregates and Natural aggregates.M30 grade of concrete is being used for the design .Aggregates at maximum size of 20mm is taken. The required strength for rigid pavements under recycled aggregates is being evaluated in this project. The ultimate aim is to attain a suitable strength on usage of recycled aggregates for rigid pavements in rural roads thus to implement cost effective nature and durability.
Keywords: sustainable development, rigid pavements, recycled aggregates etc..
The green aggregates for sustainable development in construction industryeSAT 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
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
Compressive strength of concrete with fly ash, nanosilica and recycled aggregateeSAT Journals
Abstract In this study, concrete mix was prepared using recycled aggregates (RA) which were retrieved from demolished concrete blocks. Pozzolanic materials like fly ash (FA) and nanosilica (NS) were used as partial replacement of cement by weight in varying percentages i.e. 10%, 20% 30% and 2%, 3%, 4% respectively. The experimental work was focused on investigating the effect of nanosilica and fly ash on fresh properties and compressive strength of recycled aggregate concrete (RAC). To examine the fresh properties of concrete, slump test was performed for workability requirements. It was observed from experimental results that with the increase in percentage of recycled aggregates in concrete, compressive strength decreases but workability was not affected up to 50% variation of recycled aggregates. Results showed that with the addition of nanosilica compressive strength of concrete was increased but workability was decreased with the increase in percentage of nanosilica. The use of fly ash in addition to nanosilica (30% RA+3% NS + 10% Fly Ash) improved both the workability and compressive strength of recycled aggregate concrete (RAC). Keywords: Compressive strength, Recycled aggregates (RA), Nanosilica (NS), Fly Ash (FA), Recycled aggregate concrete (RAC).
ALTERNATE AND LOW COST CONSTRUCTION MATERIAL: RICE HUSK ASH (RHA)AM Publications
Due to pozzolanic reactivity, Rice Husk Ash is used as a supplementary cementing material in concrete. It has
economical and technical advantages to be used in concrete. I am going to replace cement by the use of RHA by 5%,10% &
15% by weight of cement in three different experiment to find out the maximum strength and compare it with the strength of
normal concrete by using the grade of M20 at the days of 7 and 14. This research therefore is an investigation of the
performance of the concrete made of partially replacing OPC with RHA on the structural integrity and properties of RHA
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
Similar to Effect of use of recycled materials on indirect tensile strength of asphalt concrete mixes (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 skew angle on static behaviour of reinforced concrete slab bridge d...eSAT Journals
Abstract
The effect of a skew angle on single-span reinforced concrete bridges is analyzed using the finite-element method and the results are
presented in this paper. Investigations are carried out on RC slab bridge decks with and without edge beams to study the influence of
aspect ratio, skew angle and type of load. The finite-element analysis results for skewed bridges are compared to the reference
straight bridges for dead load, IRC Class A loading and IRC 70R loading for with and without edge beam. A total of 90 bridge models
are analyzed. The variation of maximum deflection, maximum longitudinal sagging bending moment, maximum torsional moment, and
maximum support reaction with skew angle is studied for all 90 bridge deck models. The FEA results of Dead load and Live load
bending moments and deflections decreases with increase in skew angle, where as maximum support reactions increases with increase
in skew angle and the maximum torsional moment increases with skew angle up to 45 degrees and there after decreases. The benefit
of providing edge beam is reflected in significant decrease in deflection, longitudinal bending moment and torsional moment.
Keywords: Bridges, skew angle; Concrete slabs; Finite element method; span length; dead load; IRC Class A loading
and IRC Class 70R loading.
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.
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/
Democratizing Fuzzing at Scale by Abhishek Aryaabh.arya
Presented at NUS: Fuzzing and Software Security Summer School 2024
This keynote talks about the democratization of fuzzing at scale, highlighting the collaboration between open source communities, academia, and industry to advance the field of fuzzing. It delves into the history of fuzzing, the development of scalable fuzzing platforms, and the empowerment of community-driven research. The talk will further discuss recent advancements leveraging AI/ML and offer insights into the future evolution of the fuzzing landscape.
NO1 Uk best vashikaran specialist in delhi vashikaran baba near me online vas...Amil Baba Dawood bangali
Contact with Dawood Bhai Just call on +92322-6382012 and we'll help you. We'll solve all your problems within 12 to 24 hours and with 101% guarantee and with astrology systematic. If you want to take any personal or professional advice then also you can call us on +92322-6382012 , ONLINE LOVE PROBLEM & Other all types of Daily Life Problem's.Then CALL or WHATSAPP us on +92322-6382012 and Get all these problems solutions here by Amil Baba DAWOOD BANGALI
#vashikaranspecialist #astrologer #palmistry #amliyaat #taweez #manpasandshadi #horoscope #spiritual #lovelife #lovespell #marriagespell#aamilbabainpakistan #amilbabainkarachi #powerfullblackmagicspell #kalajadumantarspecialist #realamilbaba #AmilbabainPakistan #astrologerincanada #astrologerindubai #lovespellsmaster #kalajaduspecialist #lovespellsthatwork #aamilbabainlahore#blackmagicformarriage #aamilbaba #kalajadu #kalailam #taweez #wazifaexpert #jadumantar #vashikaranspecialist #astrologer #palmistry #amliyaat #taweez #manpasandshadi #horoscope #spiritual #lovelife #lovespell #marriagespell#aamilbabainpakistan #amilbabainkarachi #powerfullblackmagicspell #kalajadumantarspecialist #realamilbaba #AmilbabainPakistan #astrologerincanada #astrologerindubai #lovespellsmaster #kalajaduspecialist #lovespellsthatwork #aamilbabainlahore #blackmagicforlove #blackmagicformarriage #aamilbaba #kalajadu #kalailam #taweez #wazifaexpert #jadumantar #vashikaranspecialist #astrologer #palmistry #amliyaat #taweez #manpasandshadi #horoscope #spiritual #lovelife #lovespell #marriagespell#aamilbabainpakistan #amilbabainkarachi #powerfullblackmagicspell #kalajadumantarspecialist #realamilbaba #AmilbabainPakistan #astrologerincanada #astrologerindubai #lovespellsmaster #kalajaduspecialist #lovespellsthatwork #aamilbabainlahore #Amilbabainuk #amilbabainspain #amilbabaindubai #Amilbabainnorway #amilbabainkrachi #amilbabainlahore #amilbabaingujranwalan #amilbabainislamabad
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.
Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
This paper addresses the vulnerability of deep learning models, particularly convolutional neural networks
(CNN)s, to adversarial attacks and presents a proactive training technique designed to counter them. We
introduce a novel volumization algorithm, which transforms 2D images into 3D volumetric representations.
When combined with 3D convolution and deep curriculum learning optimization (CLO), itsignificantly improves
the immunity of models against localized universal attacks by up to 40%. We evaluate our proposed approach
using contemporary CNN architectures and the modified Canadian Institute for Advanced Research (CIFAR-10
and CIFAR-100) and ImageNet Large Scale Visual Recognition Challenge (ILSVRC12) datasets, showcasing
accuracy improvements over previous techniques. The results indicate that the combination of the volumetric
input and curriculum learning holds significant promise for mitigating adversarial attacks without necessitating
adversary training.
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
Vaccine management system project report documentation..pdfKamal Acharya
The Division of Vaccine and Immunization is facing increasing difficulty monitoring vaccines and other commodities distribution once they have been distributed from the national stores. With the introduction of new vaccines, more challenges have been anticipated with this additions posing serious threat to the already over strained vaccine supply chain system in Kenya.
COLLEGE BUS MANAGEMENT SYSTEM PROJECT REPORT.pdfKamal Acharya
The College Bus Management system is completely developed by Visual Basic .NET Version. The application is connect with most secured database language MS SQL Server. The application is develop by using best combination of front-end and back-end languages. The application is totally design like flat user interface. This flat user interface is more attractive user interface in 2017. The application is gives more important to the system functionality. The application is to manage the student’s details, driver’s details, bus details, bus route details, bus fees details and more. The application has only one unit for admin. The admin can manage the entire application. The admin can login into the application by using username and password of the admin. The application is develop for big and small colleges. It is more user friendly for non-computer person. Even they can easily learn how to manage the application within hours. The application is more secure by the admin. The system will give an effective output for the VB.Net and SQL Server given as input to the system. The compiled java program given as input to the system, after scanning the program will generate different reports. The application generates the report for users. The admin can view and download the report of the data. The application deliver the excel format reports. Because, excel formatted reports is very easy to understand the income and expense of the college bus. This application is mainly develop for windows operating system users. In 2017, 73% of people enterprises are using windows operating system. So the application will easily install for all the windows operating system users. The application-developed size is very low. The application consumes very low space in disk. Therefore, the user can allocate very minimum local disk space for this application.
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
Explore the innovative world of trenchless pipe repair with our comprehensive guide, "The Benefits and Techniques of Trenchless Pipe Repair." This document delves into the modern methods of repairing underground pipes without the need for extensive excavation, highlighting the numerous advantages and the latest techniques used in the industry.
Learn about the cost savings, reduced environmental impact, and minimal disruption associated with trenchless technology. Discover detailed explanations of popular techniques such as pipe bursting, cured-in-place pipe (CIPP) lining, and directional drilling. Understand how these methods can be applied to various types of infrastructure, from residential plumbing to large-scale municipal systems.
Ideal for homeowners, contractors, engineers, and anyone interested in modern plumbing solutions, this guide provides valuable insights into why trenchless pipe repair is becoming the preferred choice for pipe rehabilitation. Stay informed about the latest advancements and best practices in the field.
The Benefits and Techniques of Trenchless Pipe Repair.pdf
Effect of use of recycled materials on indirect tensile strength of asphalt concrete mixes
1. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
__________________________________________________________________________________________
IC-RICE Conference Issue | Nov-2013, Available @ http://www.ijret.org 226
EFFECT OF USE OF RECYCLED MATERIALS ON INDIRECT TENSILE
STRENGTH OF ASPHALT CONCRETE MIXES
Shunyashree1
, Tejas Bhavimane2
, M.R.Archana3
, M S Amarnath4
1, 2
IV 1
semester, M.Tech, 3
Assistant Professor, 4
Professor-Civil Engineering, R.V College of Engineering, Bangalore,
India
shunyashree@gmail.com, tejasbavimane@ymail.com, archana.mosale@gmail.com, amarnath_ms@rediffmail.com
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 300
C.
Keywords: Reclaimed asphalt pavement, Foundry waste, Recycling, Marshall Stability, Indirect tensile strength.
--------------------------------------------------------------------***-----------------------------------------------------------------------
1. INTRODUCTION
Recycling has been successfully used at many places world
over and has shown good performances. Asphalt pavement
recycling technology is not so popular in India, but gaining its
popularity because of its valuable approach for technical,
environmental and economical reasons. By volume, aggregate
generally accounts for 92 to 96 percent of AC and about 70 to
80 percent of Portland cement concrete. Aggregate is also used
for base and sub-base courses for both flexible and rigid
pavements. Aggregates can either be natural or manufactured.
Natural aggregates are generally extracted from larger rock
formations through an open excavation. While several factors
influence the use of RAP in asphalt pavement, the two primary
factors are economic savings and environmental benefits. RAP
is a useful alternative to virgin materials because it reduces the
use of virgin aggregate and the amount of virgin asphalt binder
required in the production of hot mix asphalt. The use of RAP
also conserves energy, lowers transportation costs required to
obtain quality virgin aggregate, and preserves resources.
Additionally, using RAP decreases the amount of construction
debris placed into landfills and does not deplete non renewable
natural resources such as virgin aggregate and asphalt binder.
2. LITERATURE REVIEW
Recycling asphalt creates a cycle that optimizes the use of
natural resources and sustains the asphalt pavement industry.
Based on the recent studies, in USA, 33 million tons of RAP is
used per year for recycling purpose which is around 80% of
the total amount of RAP collected from old bituminous
pavements. The amount of RAP used for recycling per year is
about 0.84 million tons in Sweden, 7.3 million tons in
Germany, 0.53 million tons in Denmark and around 0.12
million tons in Netherlands. Pavement recycling-an overview:
This discusses about the various recycling materials and they
also study the advantages of RAP over other recycling
material. Which includes, According to a report published by
the Federal Highway Administration (1997), in the United
States of America, asphalt pavement is the most recycled
product (in terms of tonnage) compared to others such as
newsprint, glass bottles, aluminum cans and plastic containers.
The conclusion is as follows, as resources become scarcer and
environmental concern becomes more widespread, it is
anticipated that pavement recycling will become more
important in the coming years. Use and Reuse of materials
have gained high importance in recent years. Depleting natural
resources, reuse of available resources can effectively cut
down cost and save environment. The literature review
indicates that not many studies are on use of reclaimed asphalt
pavement in bituminous mixes have been tried hence
necessitating the study.
2.1 Need for Study
The main emphasis of this study was to reuse the high
invested pavement material for its best instead of burying it in
underneath layers over the new pavement. Depleting natural
resources and increase in cost gives way to use of RAP for the
2. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
__________________________________________________________________________________________
IC-RICE Conference Issue | Nov-2013, Available @ http://www.ijret.org 227
pavement. Reuse of available resources can effectively cut
down cost and save environment. Though use of RAP in base
and sub base courses have been explode, full fledged use is yet
to be undertaken under field conditions. Also, use of RAP in
binder courses is less explored. In this work an effort has been
taken up to throw light on use of RAP in bituminous concrete
grade I mixes with laboratory investigations.
2.2 Objectives of Present Paper
1. To evaluate the improvement or changes in Marshall
properties namely stability, flow, bulk density, voids in
mineral aggregates (VMA), voids filled with bitumen
(VFB), optimum binder content for AC mixes with
varying percentage of RAP.
2. To compare the Marshall properties of AC mixes with
RAP and AC mixes with conventional aggregates and
bitumen or binder extracted aggregates.
3. To study the indirect tensile strength behaviour of
asphalt concrete mixes with conventional aggregate,
binder extracted aggregates and varying percentages of
Rap at 30o
C.
3. METHODOLOGY
For the present study RAP has been procured from the surface
course BC grade I of NH-4 from Sira near Tumkur. Black
sand a by-product from the foundry industry has been used as
filler in AC mix. Crumb rubber modified bitumen (CRMB-55)
has been used as the binder material since the procured RAP
contained the CRMB-55 binder. For the present study, an
attempt has been made to investigate the effect of RAP in
asphalt concrete.RAP without binder extraction has been tried
at trial percentages of 30, 40, 50, and 60. For comparison,
laboratory properties of AC mixes with conventional
aggregate was tried. Also an attempt has been made to use
binder extracted RAP aggregate in AC mixes. In all the cases,
foundry waste has been used as replacement to conventional
fine aggregates and filler.
Coarse aggregates: Conventional aggregate were collected
from local quarry. These were replaced with 30, 40, 50 and 60
percentage of RAP. Hence basic properties of both
conventional and RAP were conducted and are as presented in
Table1.
Fine aggregates: Foundry waste has been used as fine
aggregate in extracted RAP AC mixes for the size 300 and 150
microns, For 30, 40, 50, 60, percentages of RAP AC mixes
2.36 mm and 1.18 mm RAP fines are used. Conventional
aggregates are used for missing blending proportions of RAP.
For binder extracted RAP aggregates foundry waste are used
as substitute for fine aggregate.
Table 1 Basic properties of conventional and RAP aggregates
Sl no Aggregate tests
Conventional
aggregates
RAP
aggregates
Requirements as per Table 500-14 of
MoRT&H
(IV revision)
Specifications
1 Crushing value (%) 22.7 21.1 Max 30%
2 Impact value (%) 19 16.08 Max 27%
3 Los Angeles abrasion value (%) 21.50 20 Max 35%
4
Flakiness and Elongation Index
(Combined) (%)
29.52 26 Max 30%
5 Water absorption (%) 0.162 0.11 Max 2%
6
Aggregate specific gravity
1.Coarse aggregate
2.Fine aggregate
2.65
2.7
2.69
2.31
2.5-3.0
Filler: The foundry collected is a byproduct which is used as a
raw material for cement industry. Fills the voids between the
fine aggregates, stiffens the binder and offers permeability.
Black sand byproduct of foundry industry was used as filler in
asphalt mix. The foundry waste was collected from Dakshin
industry near Hoskote, Bangalore. The chemical composition
of foundry waste is as shown in table 2. The percentage of
silica being 89.49% encouraged the use of foundry waste as
fine aggregates and filler as a replacement to conventional
aggregate and cement respectively. Specific gravity of foundry
waste was found to be 2.56.
3. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
__________________________________________________________________________________________
IC-RICE Conference Issue | Nov-2013, Available @ http://www.ijret.org 228
Table 2 Chemical composition of Foundry waste
Source: Raghavendra Spectro Metallurgical Laboratory, Bangalore.
Binder: Fills the voids and also cause particle adhesion.
Crumb rubber modified bitumen (CRMB-55) is used in the
mix as the procured RAP contained the same binder in the
aggregates which was used without extraction.
Table 3 Basic properties of Crumb rubber modified bitumen (CRMB-55)
Sl.No Parameter Value (%)
1 Calcium Carbonate 0.60
2 Magnesium Carbonate 0.10
3 Silica 89.49
4 Titanium di Oxide 0.68
5 Alumina 2.40
6 Manganese Oxide 0.03
7 Magnesium Oxide 0.03
8 Calcium Oxide 0.34
9 Potassium Oxide 2.60
10 Phosphorus Pentoxide 0.01
11 Barium Oxide 0.03
12 Loss of Ignition 3.68
SL
No.
Test Conducted Test results
Requirements as per
IRC SP:53-2002
1 Penetration at 250
C,0.1 mm, 100gm, 5sec 56 <60
2 Softening point (R&B), (0
C) 56 55(minimum)
3 Flash point,0
C 310 220 (minimum)
4
Elastic Recovery of half thread in ductilometer at
150
C, %,
60 50 (minimum)
Thin film oven test (TFTO) on residue
5 Penetration at 250
C,0.1 mm, 100gm, 5sec 64 60(minimum)
6 Increase in softening point (R&B), (0
C), 5 6(maximum)
7
Elastic Recovery of half thread in ductilometer at
250
C, %
45 35(minimum)
4. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
__________________________________________________________________________________________
IC-RICE Conference Issue | Nov-2013, Available @ http://www.ijret.org 229
Aggregate gradation: Bituminous concrete mix of grading-I,
was chosen as per clause 500-18, of MoRT&H (IV revision)
specifications. Table 4 shows the gradation adopted for the
mix.
Table 4 Aggregate gradation as per MoRT&H (IV revision) for Asphalt concrete grade-I mix
Sieve size in, mm Adopted mid gradation
% Weight
Retained
Weight retained,
grams
26.5 – 19 89.5 10.5 129
19 - 13.2 69 20.5 247
13.2 - 9.5 62 7 88
9.5 - 4.75 45 17 205
4.75 - 2.36 36 9 111
2.36 - 1.18 27 9 111
1.18 - 0.6 21 6 76
0.6 - 0.3 15 6 80
0.3 - 0.15 9 6 76
0.15 - 0.75 5 4 53
4. MARSHALL METHOD OF MIX DESIGN
Marshall Tests were conducted for asphalt concrete mixes
prepared with replacement of conventional coarse and fine
aggregate with RAP and filler with foundry waste with trial
percentages of 30, 40, 50, and 60. For comparison Marshall
tests were conducted on asphalt concrete mixes with binder
extracted RAP aggregate and conventional aggregates.
CRMB-55 was used as binder since the source of RAP
contained the same binder. Foundry waste was used to replace
the conventional fine aggregate and filler. The Marshall test
results for AC mixes with conventional and bitumen extracted
RAP aggregates are as shown in Table 5. Marshall Test was
conducted in accordance with code ASTM D6926 – 04. Figure
1 to Figure 3 indicates the influence of Marshall properties of
RAP on asphalt concrete mixes.
Table.5 Marshall Properties of asphalt concrete mix with conventional aggregates and Bitumen extracted RAP aggregates
Sl.No AC mix with Marshall
stability, KN
Flow,
mm
VMA,% VFB,% OBC,
%
Bulk density,
gm/cc
1
Conventional
aggregates
25.9 3.87 13.6 88.94 5.3 2.3
2
Bitumen
extracted
aggregates
27.11 3.81 13.60 87.57 5.2 2.29
5. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
__________________________________________________________________________________________
IC-RICE Conference Issue | Nov-2013, Available @ http://www.ijret.org 230
Fig1. Effect of RAP on Marshall Stability and flow of asphalt concrete mixes
Fig 2.Effect of RAP on VMA and VFB of asphalt concrete mixes
Fig3 Effect of RAP on OBC and bulk density of asphalt concrete mixes
6. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
__________________________________________________________________________________________
IC-RICE Conference Issue | Nov-2013, Available @ http://www.ijret.org 231
4.1 Indirect Tensile Strength Test
Indirect tensile strength tests were conducted on asphalt
concrete mixes at optimum binder content for 30, 40, 50, 60
percentages of RAP aggregates. For comparison asphalt
concrete mixes prepared with conventional aggregates and
binder extracted RAP aggregates were tested for indirect
tensile strength. The tests were conducted on unconditioned
specimens at 30oC.
The indirect tensile test is performed by loading a cylindrical
specimen with a single or repeated compressive load
according to ASTM D 6931 test, which acts parallel to and
along the vertical diametric plane. This loading configuration
develops a relatively uniform tensile stress perpendicular to
the direction of the applied load and along the vertical
diametric plane, which ultimately causes the specimen to fail
by splitting along the vertical diameter.
4.2 Indirect Tensile Strength Test Results
The tests were conducted on the asphalt concrete mixes
prepared for both conventional and RAP specimens with 30,
40, 50, 60 percent without extraction, 100 percent RAP with
extraction with test temperature of 300C. Table 6 and 7 shows
the indirect tensile strength test results and the same is
graphically represented as shown in figure4.
Table.6 Effect of RAP on ITS of AC mixes at 300
C.
Table7 Indirect tensile strength test results for 0, 100 percent
extracted RAP aggregates at 300
C.
Fig4. Effect of RAP on indirect tensile strength in AC mixes
DISCUSSIONS AND CONCLUSIONS
Marshall Stability and indirect tensile strength test were
conducted on asphalt concrete mixes with 30, 40, 50, and 60%
RAP aggregate. For comparison, tests were also conducted on
asphalt concrete mixes with conventional and bitumen
extracted aggregate. From table 5 and figure 1 to figure 3
following inferences was withdrawn.
1. The Marshall Stability and bulk density of AC mixes
initially decreased and further increased with the increase
in RAP aggregates. Stability value obtained satisfied the
requirements as per Table 500-19, MoRT&H (IV
revision).
2. The flows increased with increase in RAP content and
were in the permissible limit as per Table 500-19,
MoRT&H (IV revision). But the AC mix with 60% RAP
showed the maximum flow which was more than the
permissible limits.
3. Percentage of voids in mineral aggregates and optimum
binder content decreased with the increase of RAP
aggregates in AC mixes.
4. Percentage of voids filled with bitumen increased and
decreased as the RAP contentment was increased. This
was not in permissible limits as per Table 500-19,
MoRT&H (IV revision) due to the presence of bitumen
content of RAP.
5. The stability of AC mixes was found to be increased by
28.6%, 26.29%, 13.16%, 46.6% and 4.67% for 30, 40,
50, 60% and bitumen extracted aggregates as compared
to conventional mixes. Due to the presence of hard aged
binder the stability has increased when compared with
conventional mix.
6. It was found that optimum binder content decreased by
14.5%, 21.5%, 23.9%, 24.5% and 1.8% for 30, 40, 50,
60% and bitumen extracted aggregates as compared to
conventional mixes. The presence of bitumen content in
the RAP has influenced the optimum binder content to
decrease with respect to conventional mix.