The Effect of Microbially Induced Calcium Carbonate on the Strength of Concrete Joint Reinforced

Abstract

One emerging method for reinforcing concrete is called "microbially induced calcium carbonate
precipitation" (MICP). Direct shear experiments were carried out on concrete cracked samples reinforced by microbially produced calcium carbonate in order to enhance the reinforcing influence of MICP on concrete joints in a saline-alkaline environment. A thorough analysis was conducted to determine the strengthening effects of Sporosarcina pasteurii on the shear strength of concrete joints. MICP was used to treat and reinforce sandstone samples with uneven surfaces. Subsequently, laboratory tests were conducted to thoroughly evaluate the shear strength characteristics of rock joints reinforced with CaCO3. The outcomes demonstrated that the adapted Sporosarcina Pasteurii performs well when it comes to reinforcement in saline-alkaline environments. Shear strength of concrete joints repaired with microbially generated calcium carbonate rose considerably in the saline-alkaline environment. Throughout the trial, the ultimate shear-strength concrete joint reinforced by MICP increased with curing time; however, its strength increased more quickly in the early stages and more slowly in the latter stages. Comparing cemented concrete joints to uncemented concrete joints, the peak shear strength of the former rose dramatically. The present study concept may serve as a standard for using the MICP technique to fix concrete joints.