Title:
Service Life Prediction of Concrete Against Microbial Induced Corrosion
Author(s):
Feyza Nur Sahan
Publication:
Web Session
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Issue:
Appears on pages(s):
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DOI:
Date:
10/23/2022
Abstract:
Microbial induced corrosion of concrete (MICC) is a multi-stage deterioration process influenced by the presence and activities of bacteria in wastewater collection, storage, and treatment infrastructure. MICC reduces concrete service life significantly and is a serious issue due to enormous cost and environmental effects. Conventional accelerated laboratory methods may not accurately represent the rate of concrete deterioration that occur in field conditions. However, recently, a biogenic benchtop method for assessing MICC has been developed and standardized (ASTM 1904-20). This new approach does not rely on H2S as the nutrient source for the bacteria, but rather uses elemental sulfur species, therefore, it is practical, safer, and rapid. In this work, we developed a life cycle model approach to study MICC to correlate the results of the ASTM 1904-20 approach to real field conditions such as whose found in sewer pipes. This correlation is based the Pomeroy model that relates the field H2S concentrations, wastewater flow conditions, geometry and the properties of the concrete. The presentation will demonstrate how the ASTM 1904 data could be used to predict the performance of different types of concrete and antimicrobial products in realistic exposure scenarios.