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Still Going Strong 17 Years Later
Project combines Permacast® with ConMICShield® to Repair AND Prevent Damage from MIC
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| Categories: Case Studies | View Count: (311)
Treating Bacterial Concrete Corrosion
Mircrobiologically Induced Corrosion (MIC) is a biochemical process through which sulpher compunds present in wasterwater are transformed, through a complicated, multiple-step process, into sulphuric acid.
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| Categories: Case Studies | View Count: (1871)
Lined Manhole Remains Intact after Sewer Collapses
Lined Manhole Remains Intact after Sewer CollapsesIn late July, the City of Chicago experienced unusually heavy rainfall with accumulations exceeding 7 inches in just a few short hours. Such heavy storm events overburden systems causing uncommonly high erosion of pipe and manholes in combination systems that convey both storm water and sanitary waste.
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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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| Categories: Case Studies | View Count: (1745)
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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| Categories: Case Studies | View Count: (1719)
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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| Categories: Case Studies | View Count: (1536)
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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| Categories: Case Studies | View Count: (1701)
Manholes Take Center Stage in Chicago
$60 Million project under way using advanced mortar for rehab work.
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| Categories: Case Studies | View Count: (1570)
Anti-Microbial Additive Helps Concrete Survive in Sewer Project
Anti-Microbial Additive Helps Concrete Survive in Sewer Project
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| Categories: Case Studies | View Count: (5680)
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