Developed in the 1970's, sewer pipe rehabilitation by curing a resin-impregnated tube within the host pipe has grown in acceptance and usage worldwide. This paper will discuss the important parameters and characteristics associated with resin selection and how resin chemistry affects selection. Each rehabilitation project has its own individual requirements and there are both chemical-resistance and mechanical performance considerations that must be taken into account during the design of the liner. Finally, this paper will compare the different resin thickening technologies used to overcome the most commonly encountered problems of sewer pipe rehabilitation such as inflow and infiltration (I/I) and resin migration during inversion and curing.
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