PROCESSED FLYASH GEOPOLYMER CONCRETE AND EFFECTS OF MIRHA (MICROWAVE INCINERATED RICE HUSK ASH) ON PROCESSED FLYASH GEOPOLYMER CONCRETE AND ITS COMPARISON WITH DIFFERENT GEOPOLYMER CONCRETE & CEMENT CONCRETE

The objective of this study is to study the effects of partial replacement of MIRHA on processed fly ash as a geopolymer concrete & is compared with the unprocessed fly ash and Plain Cement Concrete. The strength of plain cement concrete, increases gradually from 3 to 28 days of water curing. The strength of processed and rice husk ash processed flyash geopolymer concrete mixes gain early strength within 3 days of curing and later increases only by 20 to 25% at the end of 28 days of curing. The strength of rice husk ash processed flyash geopolymer concrete mixes increases the strength from 2% to 3% replacement and beyond 5% replacement the strength starts decreasing. 3% rice husk ash processed flyash geopolymer concrete gives the maximum value of compressive strength as compared to other mixes. As the percentage of rice husk ash is replaced from 2% to 10% the flyash to alkaline activator ratio goes on decreasing from 0.66 to 0.43. The more the rice husk is replaced less will be flyash to alkali activator ratio, but there will be decrease in strength.