Study on the compressive strength of glass fibre reinforced M20 grade self-healing concrete using a novel technique microbial induced calcite precipitation

Abstract

• A novel MICP (Microbial Induced Calcite Precipitation) is used to quantify the compressive strength of glass fiber reinforced self healing concrete. • Statistical analysis presents a significant impact of impact strength. • Glass fiber reinforced concrete had more strength compared to bacterial concrete, The objective of the study was to quantify the compressive strength of glass fiber reinforced self healing concrete using a novel MICP (Microbial Induced Calcite Precipitation). The total sample size was 24. It was calculated using clincalc software. In this software G power and alpha was set as 95 % and 0.05 respectively. Two groups consisting of 18 samples each were prepared for the collection of data. One is prepared with the addition of glass fibre and the other is without fiber. Bacteria Bacillus subtilis was prepared in the bioinformatics laboratory using a strain brought from the hi media laboratories. The data was analysed using a statistical software SPSS, version 21. The mean compressive strength of glass fiber reinforced concrete was 30.8074 N/mm 2 and the compressive strength of bacterial concrete without fiber was 27.6445 N/mm 2 . Independent samples t -test is performed to analyse the results. The significance (p) value obtained was 0.107 (p > 0.05) suggesting that there is no statistical significant difference. The standard deviation of glass fiber reinforced bacterial concrete was 2.51687. The glass fiber reinforced concrete had more strength compared to bacterial concrete. The percentage increase in strength of glass fiber reinforced concrete was 11.44 %.