International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
STUDY OF STRENGTH OF CONCRETE WITH PALM OIL FUEL ASH AS CEMENT REPLACEMENTIAEME Publication
Rapid growth of infrastructure has led to the use of concrete almost everywhere, and one of the main products required in manufacturing concrete is cement, with the increase in the amount of cement used, heat of hydration increases which will lead to the formation of cracks in concrete accompanied by shrinkage effect. In order to control this, palm oil fuel ash, an agro waste which contains some amount of silica act as a pozzolanic material is being used as cement replacement and its strength is compared with conventional concrete of grade M25. Palm oil fuel ash which is obtained by burning palm fruit and dry leaves of palm oil tree in palm oil mills is also used to control heat of hydration effect on concrete, after pulverizing and making it into a fine powder. In this study cement is being replaced with palm oil fuel ash by 5%, 7.5%, 10%, 12.5%, 15%, 17.5% and the strength tests like compressive strength test, tensile strength test, flexural strength test are performed and are compared with the results of conventional concrete of grade M25 for 3,7 and 28 days. Satisfactory results have been found at a percentage of 12.5%. Increase in strength is found at this percentage.
Repairing of Concrete by Using Polymer-Mortar CompositesIJMER
Abstract: Replacement of concrete buildings, bridges, roadways and other structures is becoming more and more expensive as costs of materials and labor continue their upward spiral. Polymermodified or polymer cement mortar (PCM) and concrete (PCC) are a category of concrete-polymer composites which are made from cement mortar or concrete with polymers, The main application of
polymer cements is in concrete repair. In this research two sets of mixtures were prepared that consist of mortar and polymer to fabricate the polymer-cement composite. The first set include mortar with ratio (1:1) (cement-sand) without water, while the other set include mortar with ratio (1:2) (cementsand) without water. The polymer was Quickmast105 epoxy which is added to the mortar after mixing the resin with the hardener in proportion of (1:3). Each set was consist of different percentage of
polymer (50:50, 40:60 and 30:70). Tests were conducted, including compression, flexural and bonding strength, were several results obtained including, the highest compressive strength was about 102.889MPa and the highest value of flexural strength was about 57.648MPa for (1:1), the polymermortar with 40:60 ratio showed a higher bonding compressive strength. Proportionality between the
cement and sand and also between the polymer and mortar plays a major role in adhesion and strength are considered key factors in the bonding and portability to repairs.
Walia International Machines is a multi divisional,vacuum de watering machine,vacuum dewatering machine,vacuum dewatering machines,vacuum de dewatering machines
Address : Walia International Machines Corporation,408 Vishwadeep , District Centre, Janak Puri New Delhi- 110058,India
Website : http://waliainternational.com
Telefax : 011 – 25546044 ,25521275
Emails : info@waliainternational.com
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
STUDY OF STRENGTH OF CONCRETE WITH PALM OIL FUEL ASH AS CEMENT REPLACEMENTIAEME Publication
Rapid growth of infrastructure has led to the use of concrete almost everywhere, and one of the main products required in manufacturing concrete is cement, with the increase in the amount of cement used, heat of hydration increases which will lead to the formation of cracks in concrete accompanied by shrinkage effect. In order to control this, palm oil fuel ash, an agro waste which contains some amount of silica act as a pozzolanic material is being used as cement replacement and its strength is compared with conventional concrete of grade M25. Palm oil fuel ash which is obtained by burning palm fruit and dry leaves of palm oil tree in palm oil mills is also used to control heat of hydration effect on concrete, after pulverizing and making it into a fine powder. In this study cement is being replaced with palm oil fuel ash by 5%, 7.5%, 10%, 12.5%, 15%, 17.5% and the strength tests like compressive strength test, tensile strength test, flexural strength test are performed and are compared with the results of conventional concrete of grade M25 for 3,7 and 28 days. Satisfactory results have been found at a percentage of 12.5%. Increase in strength is found at this percentage.
Repairing of Concrete by Using Polymer-Mortar CompositesIJMER
Abstract: Replacement of concrete buildings, bridges, roadways and other structures is becoming more and more expensive as costs of materials and labor continue their upward spiral. Polymermodified or polymer cement mortar (PCM) and concrete (PCC) are a category of concrete-polymer composites which are made from cement mortar or concrete with polymers, The main application of
polymer cements is in concrete repair. In this research two sets of mixtures were prepared that consist of mortar and polymer to fabricate the polymer-cement composite. The first set include mortar with ratio (1:1) (cement-sand) without water, while the other set include mortar with ratio (1:2) (cementsand) without water. The polymer was Quickmast105 epoxy which is added to the mortar after mixing the resin with the hardener in proportion of (1:3). Each set was consist of different percentage of
polymer (50:50, 40:60 and 30:70). Tests were conducted, including compression, flexural and bonding strength, were several results obtained including, the highest compressive strength was about 102.889MPa and the highest value of flexural strength was about 57.648MPa for (1:1), the polymermortar with 40:60 ratio showed a higher bonding compressive strength. Proportionality between the
cement and sand and also between the polymer and mortar plays a major role in adhesion and strength are considered key factors in the bonding and portability to repairs.
Walia International Machines is a multi divisional,vacuum de watering machine,vacuum dewatering machine,vacuum dewatering machines,vacuum de dewatering machines
Address : Walia International Machines Corporation,408 Vishwadeep , District Centre, Janak Puri New Delhi- 110058,India
Website : http://waliainternational.com
Telefax : 011 – 25546044 ,25521275
Emails : info@waliainternational.com
Cement based building_materials_icr_aug2020Dr J.D. Bapat
Cite this paper: J D Bapat, Kalpana Karthikeyan, "Cement Based Building Materials", Indian Cement Review, August 2020, pp 48-51
The work on the following cement-based building materials has been covered: dry mix mortar plaster (DMM), cement-based fly ash bricks, AAC blocks and micro-concrete for concrete repair work.
Experimental Study on Performance of Metakaolin in Pervious ConcreteYogeshIJTSRD
Lately, part of examination center around growing new Supplementary cementitious material to fortifying the solid. These materials are utilized as a piece of concretes. Metakaolin is one of the beneficial cementitious materials which are part of the way traded for concrete. Properties of cement with metakaolin are generally favored added substances in concrete. Pervious cement is an uncommon kind of cement with a high porosity utilized for solid flatwork applications that permits water from precipitation and different sources to go straightforwardly through, in this manner diminishing the spillover from a site and permitting groundwater re energize. It likewise called as Porous concrete, Permeable concrete, No fines concrete and Porous asphalt. Pervious cement is generally utilized in stopping zones, territories with light traffic, Residential roads, Pedestrian walkways and nurseries. It is a significant application for manageable development. Metakaolin will be added at various rates or percentages such as 1 ,1.5 ,2 ,2.5 by the heaviness of concrete. To make concrete cubes and cylinders at every percent. The effect of metakaolin at various percents in pervious concrete will be finding by conducting compression test. A. Thomas Eucharist | K. Viswanathan "Experimental Study on Performance of Metakaolin in Pervious Concrete" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-5 | Issue-4 , June 2021, URL: https://www.ijtsrd.compapers/ijtsrd41139.pdf Paper URL: https://www.ijtsrd.comengineering/civil-engineering/41139/experimental-study-on-performance-of-metakaolin-in-pervious-concrete/a-thomas-eucharist
Concrete Technology, PPT Based On Unit 1 (Cement)
In this PPT you Can studied about various method of Manufacturing of cement, properties and Test on cement.
By- Prof K.S.Somase
(Assistant professor of Gurukul Education society's Institute of engineering and technology, Nandgaon
Importance of Bogue’s compounds, Structure of a Hydrated Cement Paste,Volume of hydrated product, porosity of paste and concrete, transition Zone, Elastic Modulus, factors affecting strength and elasticity of concrete,Rheology of concrete in terms of Bingham’s parameter.
aac blocks Suppliers manufacturers Hyderabad
AAC Blocks Jointing Mortar. AAC Blocks Jointing Mortar Suppliers manufacturers Hyderabad . Fusion blocks are the best aac block Manufacturers. AAC Blocks (Autoclaved Aerated Concrete) is a certified green building material. These precast concrete blocks are extremely lightweight and widely used for internal and external construction.
aac block jointing mortar, aac blocks jointing mortar, wall putty, aac blocks Hyderabad, aac blocks, aac blocks price, aac lightweight block
Fusion Building Materials Private Limited is a subsidiary of Fusion group of Companies. Fusion group is a multifaceted organization that is well-established in the infrastructure industry.
Study Of Mechanical Properties Of High Strength Concrete By Partial Replaceme...dbpublications
Concrete is considered as durable and strong material. Concrete is one of the most popular material used for constructions. The present investigation deals with High strength concrete of M60 by adding fiber material to strengthen the concrete. Partial replacement of OPC with fly ash in percentages of 0%, 5% and10% in various ratios and also add Masterpel777, super plastisizer for workability purpose. Exposure periods of 7, 14 and 28 days on various tests. In this project we have designed M60 grade concrete using Design mix of Department of Environment method of various strengths.
A Compatibility Study on Different Types of Cement and Plasticizerijsrd.com
It has long been a concrete technologist's dream to discover method of making concrete at the lowest possible water/cement ratio while maintaining a high workability. To a considerable extent this dream has been fulfilled with the advent of super plasticizers. It has added a new dimension to the application of admixtures with regards to production of high strength and flow able concretes. It is now possible to produce concrete with compressive strength of the order of 90Mpa (90 N/mm2). In the wake of energy conservation policy and diminishing supplies of high quality raw materials, there is a need to use marginal quality cements and aggregates for the production of concrete. In such instances the use of plasticizers/super plasticizers permits the production of concrete at low water/ cement ratios. We have taken ultra tech opc cement & coromandal ppc cement to find the compatibility by adding perma plast (plasticizer). The water cement ratio was maintained as 0.40 &0.45 for OPC & PPC respectively. To study the effect of these PP on various properties of concrete. The dosage of plasticizers/super plasticizers was measured as 1.5% for Perma plast for OPC & 1.3% for PPC by the weight of cement.
The Construction Chemicals Division of Chembond offers a wide range of products for applications in concrete modification, waterproofing and repair and rehabilitation of structures. It also offers a host of other product solutions like Sealants, Concrete Admixtures, Tile fixing adhesives, Tile Joint fillers and Engineering Grouts aimed at the construction and civil engineering industries. The "K-Fix" brand of construction chemicals cater to the distribution channel and applicator segment with small pack sizes, while the infrastructure projects are catered by the "Kem" series of products in bulk pack sizes. All these effort are supported by cutting edge R&D centers (in Dudhwada & Tarapur), manned by an excellent pool of professionals and state-of-the-art manufacturing facilities at 8 different locations.
K-Fix provides solution for Waterproofing, Repair, Sealant, Grout & Tiling. It has high quality standardised products with latest technology formulations which enables high quality construction, ease of application without affecting any other properties.
for More Info: www.chembondconschem.com
Physical and mechanical properties of composite brick from cement mortar, fly...eSAT Journals
Abstract Responding to the need of minimizing the extraction of natural resources like sand and lime, this study attempted to use industrial wastes such as fly ash and rubber crumbs as substitute materials in making composite brick. A composite brick was produced by varying the rubber crumbs composition, as sand substitute in the mixture, from 1030 wt.% relative to total aggregate weight. Fly ash, 20 wt.% relative to cement and fly ash weight, was used as binder substitute. After 28 days of curing, composite brick was tested in terms of compressive strength, density and water absorption capacity. Compressive test showed that the brick can only be used in less impacted area considering that it does not meet the minimum standard to be considered as substitute to the commercially available brick. A decreasing trend of its compressive strength is observed as the amount of rubber crumbs increases from 10 to 30% of the total aggregate weight. The addition of light rubber crumbs and fly ash desirably decrease the density of the composite brick when compared to those commercially sold in the market. Water absorption test revealed that the produced composite brick is more efficient in minimizing water absorption. This study demonstrated that composite brick can be made using industrial wastes as substitute for aggregate and binder, with huge implication in brick concrete making. Keywords: Composite brick, rubber crumbs, fly ash, and concrete brick
Cement based building_materials_icr_aug2020Dr J.D. Bapat
Cite this paper: J D Bapat, Kalpana Karthikeyan, "Cement Based Building Materials", Indian Cement Review, August 2020, pp 48-51
The work on the following cement-based building materials has been covered: dry mix mortar plaster (DMM), cement-based fly ash bricks, AAC blocks and micro-concrete for concrete repair work.
Experimental Study on Performance of Metakaolin in Pervious ConcreteYogeshIJTSRD
Lately, part of examination center around growing new Supplementary cementitious material to fortifying the solid. These materials are utilized as a piece of concretes. Metakaolin is one of the beneficial cementitious materials which are part of the way traded for concrete. Properties of cement with metakaolin are generally favored added substances in concrete. Pervious cement is an uncommon kind of cement with a high porosity utilized for solid flatwork applications that permits water from precipitation and different sources to go straightforwardly through, in this manner diminishing the spillover from a site and permitting groundwater re energize. It likewise called as Porous concrete, Permeable concrete, No fines concrete and Porous asphalt. Pervious cement is generally utilized in stopping zones, territories with light traffic, Residential roads, Pedestrian walkways and nurseries. It is a significant application for manageable development. Metakaolin will be added at various rates or percentages such as 1 ,1.5 ,2 ,2.5 by the heaviness of concrete. To make concrete cubes and cylinders at every percent. The effect of metakaolin at various percents in pervious concrete will be finding by conducting compression test. A. Thomas Eucharist | K. Viswanathan "Experimental Study on Performance of Metakaolin in Pervious Concrete" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-5 | Issue-4 , June 2021, URL: https://www.ijtsrd.compapers/ijtsrd41139.pdf Paper URL: https://www.ijtsrd.comengineering/civil-engineering/41139/experimental-study-on-performance-of-metakaolin-in-pervious-concrete/a-thomas-eucharist
Concrete Technology, PPT Based On Unit 1 (Cement)
In this PPT you Can studied about various method of Manufacturing of cement, properties and Test on cement.
By- Prof K.S.Somase
(Assistant professor of Gurukul Education society's Institute of engineering and technology, Nandgaon
Importance of Bogue’s compounds, Structure of a Hydrated Cement Paste,Volume of hydrated product, porosity of paste and concrete, transition Zone, Elastic Modulus, factors affecting strength and elasticity of concrete,Rheology of concrete in terms of Bingham’s parameter.
aac blocks Suppliers manufacturers Hyderabad
AAC Blocks Jointing Mortar. AAC Blocks Jointing Mortar Suppliers manufacturers Hyderabad . Fusion blocks are the best aac block Manufacturers. AAC Blocks (Autoclaved Aerated Concrete) is a certified green building material. These precast concrete blocks are extremely lightweight and widely used for internal and external construction.
aac block jointing mortar, aac blocks jointing mortar, wall putty, aac blocks Hyderabad, aac blocks, aac blocks price, aac lightweight block
Fusion Building Materials Private Limited is a subsidiary of Fusion group of Companies. Fusion group is a multifaceted organization that is well-established in the infrastructure industry.
Study Of Mechanical Properties Of High Strength Concrete By Partial Replaceme...dbpublications
Concrete is considered as durable and strong material. Concrete is one of the most popular material used for constructions. The present investigation deals with High strength concrete of M60 by adding fiber material to strengthen the concrete. Partial replacement of OPC with fly ash in percentages of 0%, 5% and10% in various ratios and also add Masterpel777, super plastisizer for workability purpose. Exposure periods of 7, 14 and 28 days on various tests. In this project we have designed M60 grade concrete using Design mix of Department of Environment method of various strengths.
A Compatibility Study on Different Types of Cement and Plasticizerijsrd.com
It has long been a concrete technologist's dream to discover method of making concrete at the lowest possible water/cement ratio while maintaining a high workability. To a considerable extent this dream has been fulfilled with the advent of super plasticizers. It has added a new dimension to the application of admixtures with regards to production of high strength and flow able concretes. It is now possible to produce concrete with compressive strength of the order of 90Mpa (90 N/mm2). In the wake of energy conservation policy and diminishing supplies of high quality raw materials, there is a need to use marginal quality cements and aggregates for the production of concrete. In such instances the use of plasticizers/super plasticizers permits the production of concrete at low water/ cement ratios. We have taken ultra tech opc cement & coromandal ppc cement to find the compatibility by adding perma plast (plasticizer). The water cement ratio was maintained as 0.40 &0.45 for OPC & PPC respectively. To study the effect of these PP on various properties of concrete. The dosage of plasticizers/super plasticizers was measured as 1.5% for Perma plast for OPC & 1.3% for PPC by the weight of cement.
The Construction Chemicals Division of Chembond offers a wide range of products for applications in concrete modification, waterproofing and repair and rehabilitation of structures. It also offers a host of other product solutions like Sealants, Concrete Admixtures, Tile fixing adhesives, Tile Joint fillers and Engineering Grouts aimed at the construction and civil engineering industries. The "K-Fix" brand of construction chemicals cater to the distribution channel and applicator segment with small pack sizes, while the infrastructure projects are catered by the "Kem" series of products in bulk pack sizes. All these effort are supported by cutting edge R&D centers (in Dudhwada & Tarapur), manned by an excellent pool of professionals and state-of-the-art manufacturing facilities at 8 different locations.
K-Fix provides solution for Waterproofing, Repair, Sealant, Grout & Tiling. It has high quality standardised products with latest technology formulations which enables high quality construction, ease of application without affecting any other properties.
for More Info: www.chembondconschem.com
Physical and mechanical properties of composite brick from cement mortar, fly...eSAT Journals
Abstract Responding to the need of minimizing the extraction of natural resources like sand and lime, this study attempted to use industrial wastes such as fly ash and rubber crumbs as substitute materials in making composite brick. A composite brick was produced by varying the rubber crumbs composition, as sand substitute in the mixture, from 1030 wt.% relative to total aggregate weight. Fly ash, 20 wt.% relative to cement and fly ash weight, was used as binder substitute. After 28 days of curing, composite brick was tested in terms of compressive strength, density and water absorption capacity. Compressive test showed that the brick can only be used in less impacted area considering that it does not meet the minimum standard to be considered as substitute to the commercially available brick. A decreasing trend of its compressive strength is observed as the amount of rubber crumbs increases from 10 to 30% of the total aggregate weight. The addition of light rubber crumbs and fly ash desirably decrease the density of the composite brick when compared to those commercially sold in the market. Water absorption test revealed that the produced composite brick is more efficient in minimizing water absorption. This study demonstrated that composite brick can be made using industrial wastes as substitute for aggregate and binder, with huge implication in brick concrete making. Keywords: Composite brick, rubber crumbs, fly ash, and concrete brick
Na elaboração do presente trabalho procedeu-se á análise de uma empresa incorporadora, prestadora de serviços, adaptada ao cliente, a Aquecigaia.
Tendo em conta o Marketing implementado pela empresa, vamos analisar quais os pontos que consideramos positivos e quais os pontos a melhorar.
No presente trabalho, com objetivo de dar a conhecer melhor a empresa realizamos uma pequena apresentação, de forma a clarificar os conceitos do Marketing a todos os que possam ter acesso a este trabalho.
Concrete is world’s most used material after water
for urban development. Concrete is made up of naturally
occurring material such as Cement, Aggregate and Water.
The cement is major ingredient of concrete and due to rapid
production of cement, various environmental problems are
occurred i.e. Emission of green house gases such as CO2. The
production of Portland cement is energy intensive.
Global warming gas is released when the raw
material of cement, limestone and clay is crushed and heated
in a furnace at high temperature of about 1500’C. Each year
approximately 1.89 billion tons of cement has been produced
world wide.
This power point presentation will able know the building materials like cement, lime, pozzolan and timber that are used in the construction of various types of building and their properties and significance in the selection and requirements of concerned material which are required in the construction. And it should be used after testing as per IS specifications and there by quality and economical in case of life span of buildings is to be specified in advance.
Development of mix design for high strength Concrete with AdmixturesIOSR Journals
This paper presents the result of mix design developed for high strength concrete with silica fume
and High range water reducing admixture (HRWR). It involves the process of determining experimentally the
most suitable concrete mixes in order to achieve the targeted mean strength. In this research work 53 grade
ordinary Portland cement, the locally available river sand, 10 mm graded coarse aggregate were selected based
on ASTM C 127 standard for determining the relative quantities and proportions for the grade of concrete M60.
For this design ACI 211.4R-93 guidelines were followed. Totally Five mixes were designed one mix was treated
as basic mix with HRWR - 0.5% without silica fume, Four mixes were designed with Micro silica quantities
varied from 5 to 9 percent weight of cementitious materials and HRWR varies between 0.6% to 0.9% with
increment of 0.1% . Each mix 2 numbers of 150mm x 300 mm cylinders were cast then kept in curing tank after
24 hours of time period. After 28 days of curing the specimens were tested and the appropriate mix proportions
were obtained.
you would be aware about the different types of special concrete being used in india.All these types of concrete are being produced by ultratech concrete, for more details visit www.ultratechconcrete.com/concrete_types.html
COMPARATIVE ANALYSIS OF CHEMICAL AND PHYSICAL PROPERTIES OF MINI CEMENT PLANT...Journal For Research
This research is about analyzing the chemical and physical characteristics of cement and concrete. Cement can be classified based on its chemical properties. The sample taken for this research work is Kamal OPC 53 grade mini cement plant and Ultratech OPC 53 grade major cement plant. The difference can be analyzed by determining the chemical composition of the cement and its effect on physical properties of cement and concrete. Secondly, it is not necessary that in every structural member of a building, the cement used needs to be same. To determine that which cement is more suitable for which structural element this analysis is beneficial. Again, if any new type of admixture needs to be introduced in the concrete, it is important to understand the chemical composition of cement and how the new admixture may react with the cement. Also, this research is about how the changes in chemical composition of cement affect the physical properties of cement and concrete. It is noticed that due to lack in standardization of cement, even the same sample of cement gives different result.
This is the presentation about the Plum concrete which is used under water to make a reservoir. This presentation is related to the Civil Engineering. The visual effect of the presentation can be seen after downloading it.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
Embracing GenAI - A Strategic ImperativePeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
Honest Reviews of Tim Han LMA Course Program.pptxtimhan337
Personal development courses are widely available today, with each one promising life-changing outcomes. Tim Han’s Life Mastery Achievers (LMA) Course has drawn a lot of interest. In addition to offering my frank assessment of Success Insider’s LMA Course, this piece examines the course’s effects via a variety of Tim Han LMA course reviews and Success Insider comments.
How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
Instructions for Submissions thorugh G- Classroom.pptxJheel Barad
This presentation provides a briefing on how to upload submissions and documents in Google Classroom. It was prepared as part of an orientation for new Sainik School in-service teacher trainees. As a training officer, my goal is to ensure that you are comfortable and proficient with this essential tool for managing assignments and fostering student engagement.
Acetabularia Information For Class 9 .docxvaibhavrinwa19
Acetabularia acetabulum is a single-celled green alga that in its vegetative state is morphologically differentiated into a basal rhizoid and an axially elongated stalk, which bears whorls of branching hairs. The single diploid nucleus resides in the rhizoid.
Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
The Roman Empire A Historical Colossus.pdfkaushalkr1407
The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
Introduction to AI for Nonprofits with Tapp NetworkTechSoup
Dive into the world of AI! Experts Jon Hill and Tareq Monaur will guide you through AI's role in enhancing nonprofit websites and basic marketing strategies, making it easy to understand and apply.
Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdfTechSoup
In this webinar you will learn how your organization can access TechSoup's wide variety of product discount and donation programs. From hardware to software, we'll give you a tour of the tools available to help your nonprofit with productivity, collaboration, financial management, donor tracking, security, and more.
Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdf
Which cement to use
1. 11/11/13
Which cement to use
Which cement to use?
Of late, the consumer is confronted with a vide variety of cement in the market and has to
make a choice. The common question asked is which is the best? In the market, we have ordinary
portland cement and the blended cement either as PPC or slag cement.
Even in ordinary portland cement, we have gradations as 33, 43 and 53. In addition, there
are various other types of cements such as low heat cement, rapid hardening cement, high early
strength cement, sulphated cement, hydrophobic cement, oil well cement, high aluminium cement
and masonry cement. Each cement has a specific role to play. We cannot say a particular cement
is the best cement. The choice of the cement depends upon the nature of work, local
environment, method of construction etc.
In the earlier days, we had only one cement ordinary portland cement. Subsequently, the
availability in abundance of fly ash in thermal power stations and slag in steel plants led to the
production of pozzolana cement and slag cement to conserve energy in the production of cement
and to utilise the available by-products. India was perhaps one of the few countries which
produced as much as 76 per cent of the total cement produced as blended cement, which is the
common name of pozzolanic cement as well as slag cements as early as in 1982. Then the
industry was under the control of controller of cements. After de-control, the production of
ordinary portland cement increased and consequently the percentage of blended cement came
down, currently it is somewhere around 30 per cent.
The introduction of precast / prestressed sleepers for the railways necessitated the
production of a special grade ordinary portland cement because with the then available cement, it
was not possible to obtain the desired strength as well as the rate of gain of strength for the
production of sleepers. Cement industry was permitted to manufacture the special grade ordinary
portland cement and it was commonly known as sleeper cement.
Subsequently, the Bureau of Indian Standards came forward to grade the ordinary portland
cement into grade 33 cement, grade 43 cement and grade 53 cement. This grading closely followed
the U.K. grading which was 32.5, 42.5 and 52.5 as well as 62.5, some of Indian companies are also
trying to make and persuade the Bureau of Indian Standards to introduce grade 63.
These higher grades of cements are specifically introduced to cater to the needs of the
industry engaged in the construction of long span bridges, high rise structures and other structures
of gigantic magnitude requiring high grades of concretes. With the cement then available. It was
very difficult to design a mix for obtaining concrete of grade 4.5 and above commonly used in such
structures. Hence, Bureau of Indian Standards classified ordinary portland cement into the above 3
grades that is now available in the market.
After total de-control of cement industry in 1989 and abolishing of licensing system for setting
up of cement plants in 1992, there has been phenomenal growth in the production of cement. With
the many fold increase in the production of cement, cement manufacturers adopted and aggressive
marketing strategy, each projecting their product as the best. Manufacturers of 53 grade cement
invaded the market and created an impression amongst the consumers that 53 grade OPC could be
used by them as it is the best cement and grade 33 and grade 43 cements, are inferior.
In fact, all cements are one and the same but for minor changes in the characteristics. By and
large grade 33 cement would meet the structural requirements of ordinary and small scale
consumers. 43 grade cement may be utilised for precast concrete production besides the sleeper
manufacturers and other building components producers, 53 grade., cement may be utilised by
builders of heavy infrastructure such as bridges, fly overs, large span structures and high rise
structures. The common man's perception that 53 grade. cement is the best cement is not only due
to the aggressive marketing strategies of the cement manufacturers but also on the presumption
that the heat generated during hardening of concrete is an index of its quality. When 53 grade.,
cement is used the heat generated is very high. Hence, consumers believe that it is a better cement
when actually it is not so. Each cement has to be chosen for a particular use.
While 53 grade. cement is actually best only for producing concretes of grade 53 and above, it
is not to be used in ordinary structures where concrete grade 20 is normally adequate.
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Which cement to use
The total de-control and competition amongst manufacturers and the market forces have
actually eliminated 33 grade in the market. It may be necessary to enforce the partial regulation or
self-discipline among the manufacturers of cement to produce at least 1/3rd of the cement in the
OPC category as grade 33 cement and 1/3rd another as grade 43 cement and balance 1/3rd as
grade 53 cement and partially regulate the price for these 3 grades so that, in the market 33 grade
cement will become available to the common consumer.
Though originally introduced to save energy in the cement plants and to make use of the
available industrial by products, research and experience have shown that blended cements have
more durability characteristics than the OPC of even higher grades.
Cement is primarily used to produce concrete. Concrete is mainly produced in ready mixed
plants the world over. Most of the producers of the concrete use OPC and a substantial quantity of
cementitious materials like pozzolana or granulated blast furnace slag. In countries like U.S. and U.K.
where 90 percent of the concrete produced is in the ready mixed plants and the cementitious
materials are blended in the concrete plants rather than in the cement manufacturing units. Hence,
even now in countries like U.S. and U.K. the production of OPC is very high nearly 90 percent.
In India ready mixed concrete has just had the beginning. The blending of cementitious
materials at site is not advisable now. Hence, blended cement production is very essential. At
present production of blended cement is around 30 percent. This has naturally to increase to at
least 50 per cent.
The blended cement do not gain strength immediately and also do not generate heat like OPC.
Hence, the common belief has been that blended cement is an inferior cement. Actually it is not so.
No doubt, the rate of gaining strength is slow in the case of blended cement.
But, ultimately, in the long run it gains as much strength as any OPC. Blended cements give
better workability in fresh concrete and during the hardened stage, give better durability. The
consumer is to be adequately educated on the advantages of blended cement. The reluctance on
the part of builders to opt for blended cement is to an extent justifiable because many builders were
forced to use PPC when the production of PPC was as high as 76 per cent during the control days.
They found to their dismay, they have to retain their shuttering for mush longer duration and
some times the quality of PPC was of doubtful nature because the fly ash blended with the PPC was
of verying quality. However, of late, the selection of pozzolanic materials has been more stringent
and the quality of blended cement is more consistent.
The builders can shed their past memories and start using blended cement. Manufacture of
blended cement results in substantial savings in energy and product cost. Hence, industry must pass
on to the consumers the benefits derived to the users of blended cement.
In short, every cement has its own role to play and there is no reason to believe one cement
is superior to the other cement. For ordinary structure. OPC grade 33 cement or PPC could meet the
requirements. For producing concretes of higher grades, mixes have to be designed using OPC as
well as cementitious materials concrete chemicals and some times additional fillers and even
viscocity agents.
For non structural uses such as masonry and plastering mortar, cement much lower in strength
than OPC 33 grade classified as masonry cement is the best suitable material. But, unfortunately, no
manufacturer produce this type of cement. More than the choice of the cement, the control
exercised in production of concrete in regard to the selection and proportioning of materials, use of
the minimum required quantity of water, careful handling of the mix during transportation and
placing, compacting well to get a dense concrete, having an engineered formwork, continuous curing
and the like contribute greatly to the quality and durability of concrete.
D. Srinivasan, Indian Concrete Institute, Chennai.
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