Experimental characterization of Cured In Place Pipes (CIPP)

Trechless technologies are widely using Cured In Place Pipes (CIPP) for pipelines renovation. In fact techniques based on CIPP permit to reduce time and at the same time, provide reliable results. Furthermore among the renovation technologies, CIPP appears less expensive that slip-lining. CIPP liners are made up of several layers including synthetic felt impregnated with a thermosetting resin. Different materials can be used for the felt, for the resin and for the reinforcement. The proposed paper presents the experimental results obtained during a test trial of the mechanical characteristics of CIPP manufactured with different materials: specifically different thickness and typologies of resins, epoxy, polyester and vinylester, were investigated. Standard tensile tests were carried out on specimens cut out from the cured pipes. Beside these standard tensile tests, Dynamic Mechanical Analysis (DMA) tests with 3-point bending were performed on samples of the cured resins.