Lessons Learned - Lining Asbestos Cement Sewer Main

摘要

This paper presents information on the investigation and lessons-learned during recent cured-in-place (CIP) lining project in which the host pipe was an asbestos cement (AC) sewer main. Due to deterioration of the main, swelling of the AC material resulted in reduction of the inside diameter of the pipe. Upon installation and curing of the liner material, wrinkles were noted during the follow-up inspection. Material testing and inspection were conducted to determine what, if any, impacts the wrinkling would have on the pipe's integrity. This paper examines the process of installing the CIP liner, examination of the final product and the resulting impacts of the wrinkles.