Investigation of Microbiologically Influenced Corrosion of Concrete in Sanitary Sewer Pipes and Manholes: Field Surveys and Laboratory Assessment

Microbiologically influenced corrosion (MIC) of concrete in sanitary sewer pipe and manholes is the result dilute sulfuric acid (H2SO4) dissolving cement matrix. The produced by a complex series chemical biochemical reactions. objectives this paper are: (1) to review basic science MIC process starting with various biological processes leading production acid; (2) discuss historical attempts fortify concrete; (3) present methods reduce odors corrosion; (4) evaluate technology behind use antimicrobial admixture. literature authors’ on-site laboratory investigations suggest that involves varied surface interactions. addition liquid additive as per ASTM standard procedure shows resistance its direct relation mixing time Many empirical inputs like areas, rates, impact cement, aggregate types varying installation repair structures are identified. results study show concrete, there was no growth Thiobacillus bacteria hence production. This research facilitates both long-term field experiences for provide reductions causing manholes, pump stations other structures.