Acid Attack of Concrete Caused by Sulfur Bacteria Action


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Title: Acid Attack of Concrete Caused by Sulfur Bacteria Action

Author(s): Henry T. Thorton, Jr.

Publication: Journal Proceedings

Volume: 75

Issue: 11

Appears on pages(s): 577-584

Keywords: acids;bacteria;chemical attack;chemical tests;corrsion;deterioration;dissolved gases; hydrogen sulfide;oxygen;sulfates;sulfides;sulfric acid;thiobacillus; water tunnels.

Date: 11/1/1978

The concrete in two artificial lakes decomposed to a "mush" consistancy to depth of up to 1 1/4 in. (approximately 32 mm) over aperiod of about 5 years. The program of investigation includes a liturature review, sample collection, and physical, chemical, and bacteriorlogical tests. It is concluded that the deterioration is due to acid attack and is the final stage of a corrosive process caused by sulfur bacteria action. Immediate and long range remedial measures are suggested for consideration for implementation at both sites. Attention is drawn to the fact that undected deterioration of other concrete structures may be in progress.