Sewer Linings—The Failures, Common Reasons and New Innovative Lining to Increase Reliability of Restoration

Abstract

Concrete structures are an integral part of society. Today most sewerage systems are constructed from concrete as the foundation. Concrete is susceptible to corrosion under many conditions and in sewers the acidic waste can degrade the concrete asset quickly without protection, and lead to a failure of this foundation system. The Sewer Mains are predominant concerns however an often overlooked concern is with Man Holes, Wet Wells, Access and Inspection Chambers where the moist environment and stagnant air flow allows corrosion to readily occur. Considerable effort goes into the design and construction of concrete structures, the concrete pipes, sewerage pumping stations and sewerage treatment plants. These represent considerable financial investment and with clear appreciation of options to protect these assets and how they perform in the future will provide maximum operational life. There are various ways to protect concrete from corrosion in sewerage related installations. This is a simple overview of the common systems in use and outlines the various products strengths and weaknesses, and introduces a new novel approach based on traditional proven practices.