A Experimental Study on Engineered Cementitious Composites (ECC) Incorporated with Sporosarcina pasteurii

Microbial-induced calcium carbonate precipitation (MICP) has been successfully applied to self-healing concrete with improved mechanical properties, while the performance of engineered cementitious composites (ECC) incorporated bacteria is still lacking. In this study, Sporosarcina pasteurii, which a strong ability produce carbonate, was introduced into properties analyzed in detail. A multiscale study including compression, tension and fiber pullout tests carried out explore pasteurii incorporation effect on ECC properties. Compared control group, compressive strength S.p.-ECC specimens cured for 7 days increased by almost 10% regained after 7.31%. Meanwhile, initial crack tensile 10.25% 12.68%, respectively. Interestingly, pattern also some extent, e.g., seemed minimize width. The addition failed increase strain, remained at about 4%, accordance engineering practice. Finally, matrix/fiber interface were altered lower chemical bond higher frictional strength. results microscopic scale explain well property improvements based fine-scale theory.