The experimental performance of durability and strength to repair for micro cracks in a self-healing bacterial concrete

Abstract

Carbonate-producing bacteria have sparked a lot of attention as a promising, natural, and environmentally friendly new method for improving concrete properties. Using microbial-induced carbonate precipitation to ameliorate many concrete difficulties, such as fissure repair, reduction and change of porosity and permeability, has received a lot of attention. Furthermore, bacterial carbonate precipitation (bio deposition) has been proven to improve concrete's compressive strength. Meanwhile, it appears that the study of the appropriate dosage of bacterial solution and its influence on concrete durability has been thoroughly examined. As a result, it was determined to conduct research into finding the ideal doses of bacterial solution necessary for concrete by making several concrete cube samples with different bacterial solution concentrations, such as 20 ml, 40 ml, 60 ml, 80 ml and 100 ml. Furthermore, these varied samples are examined using a variety of laboratory procedures, including the slump cone test, compressive strength test, Ultrasonic pulse velocity, platelets, Acid attack test. To determine the best dose. Bacterial concrete has been found to be superior to conventional concrete in every facet of durability. Among the several specimens used, it was discovered that bacterial concrete containing 60 ml solution is the best dosage, with the strength being stable or decreasing after that.