It defines geopolymer concrete as a material made through a chemical reaction of aluminosilicate materials like fly ash or slag with an alkaline solution. This reaction forms a three-dimensional polymeric chain and network. In contrast to Portland cement, water is not involved in the chemical reaction and curing of geopolymer concrete.
Autoclaved aerated concrete (AAC) block is a building material made of Portland cement, fine aggregates (fly ash or sand), water and an expansion agent in an autoclaving process heated under pressure which results in the production of air voids in the material, making it less dense, easy to cut/mould and better insulating. Read more.
Pumped concrete is concrete that is transported to heights using concrete pumps rather than other means. It consists of a hopper that feeds concrete into the pump, which then pushes it through delivery pipelines. Pumped concrete has a high slump value of 50-100mm to prevent segregation and bleeding, and special measures must be taken …
Sustainability of Concrete Construction Tarun R. Naik, F.ASCE1 Abstract: Sustainability is important to the well-being of our planet, continued growth of a society, and human development. Concrete is one of the most widely used construction materials in the world. However, the production of portland cement, an essential constituent
It begins with an overview of what cement is and how it is used to make concrete. It then describes the industrial process for manufacturing cement, involving grinding raw materials like limestone and clay at high temperatures in a kiln to form clinker, which is then pulverized with gypsum to become Portland cement powder. The …
Concrete durability is affected by many factors including the quality of materials used, water-cement ratio, compaction, and curing. Lack of durability can result in cracking, scaling, spalling, or disintegration of concrete. Environmental factors like abrasion, biological growth, freezing and thawing, or chemical attacks from carbonation ...
Placing of concrete. Shotcrete is a process where concrete or mortar is pneumatically projected at high velocity onto a surface. It can be placed using dry or wet mixes through pneumatic guns onto difficult surfaces like vertical walls. Shotcrete provides compaction during placement and is used in tunnels, dams, pools and for repairs.
Geopolymer concrete is made through a chemical reaction of aluminosilicate materials like fly ash with an alkaline solution, forming a three dimensional polymeric chain structure. It offers benefits over Portland cement like lower CO2 emissions in production, higher strength and durability, and the ability to utilize industrial waste …
Siva Kumar. This document presents a summary of a student's project on using red mud concrete. The student investigated replacing Portland cement with red mud, a waste product from aluminum production, in concrete. The document outlines that 1-2.5 tons of red mud is created for every ton of alumina produced. Concrete cubes were cast …
2.2 Sample Mix Proportion, Casting and Curing. The concrete mixture contains 10%, 20%, 30%, 40%, and 50% ceramic waste, with one standard coarse aggregate concrete serving as an experimental reference. According to AS 1726 ( 2017 ), the size of coarse grain that is enough to be used is between 20 and 2 mm.
Cement concrete is a composite material consisting of a binding material (cement or lime), aggregates (fine and coarse), water, and admixtures. The cement and water form a paste that coats the aggregates and binds them together. Concrete can be classified based on its constituents, method of production, place of casting, and bulk …
May 19, 2021. Mastercivilengineer. no comment. Transportation of concrete is a significant activity in the production of concrete. The time taken in transit mixer should be a design parameter as it depends on the …
2. Admixtures is defined as a material, other than, Cement Water Aggregate That is used as an ingredient of concrete and is added to the batch immediately before or during mixing. Admixtures are used to modify the properties of ordinary concrete so as to make it more suitable for any situation. 2. 3. History of admixtures is as old as the ...
Concrete Materials.ppt. The document discusses concrete, providing information on its composition, types, factors affecting strength, advantages and disadvantages, properties, and applications. It defines concrete as a composite material made primarily of cement, aggregate, and water. Different types of concrete exist …
Types of cracks in concrete. Jan 1, 2018 • Download as PPTX, PDF •. 19 likes • 10,555 views. S. sangeen khan khan. this presentation deals with the different types of cracks generated in concrete during its usage and after its application and also methods to retrofit these cracks. Read more. 1 of 13. Download now.
Y. y Sahaja. Self-compacting concrete was developed in Japan in the 1980s to solve problems with inadequate compaction of traditional concrete. It uses a high paste content and superplasticizers to create a concrete that can flow and consolidate under its own weight without vibration. Tests were developed to evaluate properties like …
1. Cement Production. 2. Portland Cement. By definition. a hydraulic cement produced by pulverizing. clinker consisting essentially of hydraulic. calcium silicates, usually containing one or more. of the forms of calcium sulfate as an interground.
Components of concrete are cement, sand, aggregates and water. Mixture of Portland cement and water is called as paste. So, concrete can be called as a mixture of paste, sand and aggregates. Sometimes rocks are used instead of aggregates. The cement paste coats the surface of the fine and coarse aggregates when mixed thoroughly and binds …
Green concrete. Aug 30, 2015 • Download as PPTX, PDF •. 62 likes • 22,430 views. AI-enhanced description. N. Naimisha Pulakanam. Green concrete is more environmentally friendly than traditional concrete by using less energy in production and emitting less carbon dioxide. It incorporates waste materials like fly ash as a partial cement ...
This document presents a project on the properties and applications of concrete. It was presented by two students from the Department of Civil Engineering at KUET. The document defines concrete as a cement-based slurry with at least 20% entrained . It discusses the materials and manufacturing process of concrete …
PPT ON GREEN CONCRETE BY TANMAY KUMAR. This document discusses green concrete, which uses industrial waste materials and requires less energy in production, reducing carbon dioxide emissions. It defines green concrete as concrete made with other concrete waste that is more environmentally friendly. The document …
AI-enhanced description. GLA University. Self-compacting concrete (SCC) was developed in Japan in the 1980s to solve issues with inadequate concrete compaction. SCC is highly flowable under its own weight and fills formwork without vibration. It was pioneered by Professor Hajime Okamura and has seen increasing use globally since 2000.
The exponential rise in the production of plastic and the consequential surge in plastic waste have led the scientists and researchers look out for innovative and sustainable means to reuse/recycle the plastic waste in order to reduce its negative impact on environment. Construction material, converting waste plastic into fuel, …
This ppt is more useful for Civil Engineering students. ... - The production of concrete involves batching, mixing, transporting, placing, compacting, curing, and finishing. Proper batching and mixing are important to ensure uniform strength. Compaction removes entrapped air for maximum strength. Curing maintains moisture for proper …
The normal strength concrete has an initial setting time of 30 to 90 minutes that is dependent on the cement properties and the weather conditions of the construction site. 2. Plain Concrete. The plain concrete will have no reinforcement in it. The main constituents are the cement, aggregates, and water.
It discusses the various steps in concrete production, including batching, mixing, transporting, placing, compacting and curing. It describes different types of batching, mixing equipment, and methods for transporting and compacting concrete. ... This is a PowerPoint presentation which contains basics of LINQ and how to use it in UiPath it …
May 14, 2016 • Download as PPT, PDF •. The reduced CO2 emissions of Geopolymer cements make them a good alternative to Ordinary Portland Cement. Produces a substance that is comparable to or better than traditional cements with respect to most properties. Geopolymer concrete has excellent properties within both acid and salt environments ...
Powerpoint presentation on CEMENT {PPT} Cement is a mixture of calcareous, siliceous, and argillaceous substances that is used as a binding agent in construction. It is produced through a process involving mixing raw materials, burning in a rotary kiln, and grinding the clinker produced. The manufacturing process can be either …
Green concrete. Feb 20, 2017 • Download as PPTX, PDF •. 16 likes • 13,479 views. S. Sathyanarayanan Dhanuskodi. The concrete which is made from the industrial wastes and eco-friendly is the green concrete.Green will reduce 10% of CO2 emission which will reduce the global warming, which is one of the reason for world's destruction.Since it ...
