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Title: Microbially Induced Corrosion: Mechanisms and a Discussion of Standardized Testing Uses and Limitations

Author(s): Jason Weiss

Publication: Web Session

Volume: ws_S21_Weiss.pdf

Issue:

Appears on pages(s):

Keywords:

DOI:

Date: 4/1/2021

Abstract:
This presentation discusses microbially induced corrosion (MIC) of concrete products. Specifically, it outlines that this is a three-stage process and discusses recent developments of a standard guide and laboratory test methods for determining the resistance of concrete to MIC. The three-stage process includes the reduction in pH (Stage I) (e.g., pH > 9-10), the attachment of biofilms which further lowers the pH (stage II) (e.g., 9-10 > pH > 4-6) and eventual deterioration due to biogenic acid exposure (Stage III) (e.g., < ~4 pH). Although the guide is intended for concrete products, it also covers specialized products. The presentation will discuss coming tests as well as limitations of tests.