Geo-polymer Bacterial Concrete Using Microorganism

The existent research investigates the ability of Bacillus bacteria species to improve the strength of Geo-polymer concrete based on bio-mineralization mechanism. The appropriate cell concentration of bacteria was introduced in ordinary and Geo-polymer concrete by way of the mixing water to compare their strength and durability. In this research, it was found that the compressive strength growth in Geo-polymer bacterial concrete was the highest in comparison to ordinary bacterial concrete at 90th day. For durability study, the specimens were immersed in 5% H2SO4 solution and the result showed that Geo-polymer bacterial concrete had the least weight and strength losses than ordinary bacterial concrete at different ages. This improvement was due to the temperature condition of Geo-polymer bacterial concrete to survive more bacteria for purpose of calcite precipitation. The density and uniformity of concrete were also examined by ultrasonic pulse velocity (UPV) test. The result showed that the density and uniformity of Geo-polymer structural bacterial concrete were more in comparison to other types of concrete