There is a common myth among industry professionals that consistently attributes adhesive or "glue-like" qualities to the resin used in cured in-place pipelining applications. It is believed that the resin actually bonds to the host pipe material and in effect, creates a seal between the cured-in-place pipe and the host pipe eliminating any points of infiltration into the collection system. Extensive testing has dispelled this myth entirely as well as raises awareness of the presence of grease and other contaminants that eliminate the possibility of a seal being created between the two components. The concern for adhesion is increased when linings are used to renew lateral pipes and sealing to the main pipe lining is required. Levels of adhesion are relevant to the service life of linings that are specifically designed to seal lateral pipe linings to main pipe linings. The industry will require methods for testing the connection between cured in-place lateral linings (CIPLL) and the main sewer pipe. Test methods must consider material composition, contaminants, preparation, and external hydrostatic forces. Lateral lining technology has progressed significantly over the last 15-years and this paper discusses those advancements.
展开▼
