Method for repairing sewer pipes

Details Method for repairing sewer pipes Method for repairing sewer pipes

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F16L 55/16 (2006.01) F16L 55/165 (2006.01) F16L 55/18 (2006.01)

Patent

CA 1062634

METHOD FOR REPAIRING SEWER PIPES ABSTRACT A sewer pipe is repaired by inserting a thin, flexible liner within the sewer pipe. The liner has an outer diameter less than the inner diameter of the sewer pipe, whereby an annu- lar space is presented between the liner and the sewer pipe. This annular space is filled with a low viscosity magnesium based cement, such as magnesium oxychloride cement or mag- nesium oxysulfate cement, which has a maximum Marsh funnel viscosity of 40 seconds per quart.

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