Geopolymer Lining of Corroded Reinforced Concrete Sanitary Sewer Pipes

摘要

Many utilities are seeking innovative sewer rehabilitation technologies, particularly for large-diameter pipes. This article describes the demonstration of corrosion testing for a spray-applied geopolymer mortar during the rehabilitation of a 1.5-m (60-in) reinforced concrete pipe similar to 76 m (25 ft) deep in Houston, Texas, USA. The demonstration section was 50.3 m (165 ft) of severely deteriorated pipe that terminated at a wastewater treatment plant. Unique aspects of this project included: (a) use of an innovative and emerging large-diameter structural rehabilitation technology on a severely deteriorated pipe located beneath a large open storm water channel, and (b) an independent, third-party assessment of the technology.