New Mechanisam For Using Various Grades Of Geo-Polymer Concrete With The Replacement Of Fly Ash And River Sand With Robosand

Adusumilli Sai Vishal, Boddu Ravikiran


Generally cement is used as binding material in all concrete applications. Construction is going on everywhere due to this the demand for cement is increased. One of the efforts to produce environmentally friendly concrete is to reduce the usage of Portland cement by using by-product materials, such as fly ash. It is known that production of one ton of Portland cement accounts for about one ton of carbon dioxide released to the atmosphere, as the result of de carbonation of limestone in the kiln during manufacturing of cement. A significant advance in the usage of fly ash in concrete is the development of high volume fly ash (HVFA) concrete, which partially replaces the use of Portland cement in concrete(up to 60%), while maintaining excellent mechanical properties with enhanced durability performance. Another development is geo polymer, i.e. inorganic Alumino-silicates polymer synthesized from minerals of geological origin or by- products materials, such as fly ash, rice husk ash etc., that are rich in silicon (Si) and aluminium (Al). Fly ash is abundantly available worldwide, and efforts to utilize it in concrete production are of significant interest to the concrete technologists and industry. GGBS (Ground Granulated Blast Slag) is a waste material generated in iron or slag industries have significant impact on Strength and Durability of Geopolymer Concrete. This paper gives a brief review of the development of geopolymer concrete. The factors that affect the production of geopolymer concrete such as source minerals, workability, curing time, and curing temperature are discussed in the paper. The potential use of geopolymer concrete and the future challenges are also mentioned. The Geo-polymers are comprised of alumina-silicate materials which completely replaces the Portland cement in concrete. The main objective of this project is to investigate the various grades of Geo- polymer concrete by replacing the fine aggregate with Robosand. The Mix design procedure is examined with different grades i.e., (M-30, M-35, and M-40) for Geo- polymer concrete. The compressive strength and workability of the concrete are studied for various grades of the Geo-polymer concrete.

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