| Abstrakt: |
This study aimed to examine the effects of replacing a portion of cement with GGBS and including a bacillus subtilis bacterial solution at the most effective GGBS usage levels. The development of M25 grade concrete involved the utilization of four different quantities of GGBS (namely, 5%, 10%, 15%, and 20%) as substitutes for cement. The bacterial solution was prepared using three different quantities of bacteria, specifically 103, 105, and 107cells/ml. This bacterial solution was used to replace 10% of the mixing water. The mechanical properties of concrete produced alone with GGBS and with the addition of a bacterial solution were examined. Furthermore, the water absorption of the samples was also assessed under both conditions. The test results indicate that a bacterial concentration of 105cells/ml in 10% GGBS leads to the highest mechanical strength. When the proportion of GGBS in concrete exceeded 10%, the strength began to decrease. The presence of bacteria in the concrete led to a decrease in its water absorption capacity. Consequently, regression analysis revealed a higher R2values for bacterial GGBS concrete in comparison to GGBS concrete. R2value for GGBS sample and bacterial solution were 0.771 and 0.818. |
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