Influence of Bacteria on Self-Healing Concrete

This document contemplates a critical reflection of the technological advances in biological and chemical tests that concrete is subjected to through the incorporation of bacteria, with the aim of knowing the different microbial elements that have biomineralization properties capable of self-healing in concrete. Likewise, the methods and applications of bacteria in concrete were reviewed in order to improve its mechanical properties to the different demands placed on modern structures, and at the same time contribute to the reduction of gases that are harmful to the environment. In the development of this manuscript, 80 articles indexed between the years 2017 to 2021 were reviewed, distributed as follows, 51 in Scopus, 17 in Ebsco, and 12 in SciencieDirect, pointing out and describing that microbial concrete has a promising approach in the future. Near. The results achieved with the incorporation of the different Bacillus bacteria, such as Bacillus subtillis, B, cohnii, B. pasteurii, B. pseudofirmus, B. megaterium among others, in different concentrations of cells / ml., Showed great effectiveness in the crack healing, also increasing resistance to compression, bending and traction in concrete. Based on the literary review, it is concluded that the microbial precipitation of calcium carbonate by ureolysis in the concrete matrix mitigates cracking, improves strength, increases durability and, therefore, reduces costs in repairing structures.