Geopolymer concrete using admixtures

Civil engg

Due to increasing environmental concerns ofthe cement industry alternative cement technologies have become an area ofinterest. One such thing is “GEOPOLYMER CONCRETE”.This Projectof ours is acomprehensive study conducted on geopolymer concrete using admixtures to strengthen the concrete and other properties of concrete. The geopolymer consist of fly ash which is complete replace for the cement.This fly ash reacts with NaOH and sodium silicate (Na2Sio3) to form a gel and helps in binding the fine and coarse aggregates.The attempt of our project is to find the optimum result of the different admixtures that we have used in our geopolymer concrete. The different admixtures were Super plasticizer, plasticizer, accelerator, retarder, water reducing agents, etc.The concrete cubes of 150*150*150 were casted of M30 grade of geopolymer concrete using admixtures of varying proportion and test were conducted at 7 and 28 days with and without oven curing.The admixtures that were used are never used before by anyone in the geopolymer concrete. Most of the results that were found to be impressive related to the strength of the concrete.It is an excellent alternative construction material to the existing plain cement concrete. On comparing the project with the conventional concrete it is more advantageous, economical and ecofriendly. In all there is much to be gained by using geopolymer concrete.The test results presented in this paper show the effects of various parameters on the properties of geopolymer concrete.

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