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CCPA member, ConShield, exhibited at the No Dig Conference and Exhibit in Washington, D.C. March 27-31, 2011.
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Sanitary sewer systems throughout the world have a very serious problem. It's called Sulphide Corrosion caused by bacteria produces sulfuric acid, which dissolves concrete. It doesn't take long for pipe and manholes to be damaged.
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Wichita Kansas Test Samples
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No Dig Conference 2010
CCPA member, ConShield, presented a paper and exhibited at the International No Dig Conference and Exhibit in Singapore, November 8 to 10.
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Repairing and relining large sewer lines is always a serious undertaking, especially when the lines in question run underneath a Texas bayou. Repipe Texas, a national CIPP contractor, was working on such a project when they ran into a serious snag; after designing and installing a temporary bypass system involving six high-volume diesel pumps and four temporary lines, system engineers were surprised to discover that a critical concrete junction box was badly decomposed by microbiologically induc...
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Maline Structure, St. Louis, MO
The Maline Drop Shaft located near the Chain of Rocks Bridge is just like concrete sewer structures everywhere. They corrode when hydrogen sulfide gas is present. Moderately-high temperatures, long retention times, high biological oxygen demand (BOD) levels, and turbulence contribute to elevated levels of hydrogen sulfide gas which, in turn, provide the food for acid-producing bacteria.
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| Categories: Case Studies | View Count: (2004)
Miami-Dade, Florida
Miami-Dade, Florida, has an area where levels of Hydrogen Sulfide Gas are extremely high. When unprotected concrete is exposed to hydrogen sulfide gas, Thiobacillus bacteria can create sulfuric acid that causes severe levels of structural damage from corrosion in a very short time.
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Hampton, Virginia
In 2000, the manholes near City Hall in Hampton, Virginia, were identified as being severely deteriorated from high levels of hydrogen sulfide gas which fed bacteria to form Microbiologically Induced Corrosion
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Grand Rapids, Michigan
“The proof is in the pudding,” but in this case it was in the concrete. Even sewer systems in the upper Midwest experience corrosion in sanitary sewer systems and Grand Rapids, Michigan is no exception.
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Innovative anti-microbial product for a challenging concrete pipe installation
Innovative anti-microbial product for a challenging concrete pipe installation
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| Categories: Technical Articles | View Count: (1735)
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  • ConShield
    biotech armor for concrete
    541 Tenth Street NW #233
    Atlanta, GA  USA 30318
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