For any aging infrastructure, its probability of failure increases with time. There is a multitude ofways to repair and rehabilitate deteriorating pipes, and as the infrastructure system continues toage, there is a need for less invasive pipe renewal techniques. The focus of the paper is toexamine the methodology, advantages, disadvantages, applications and factors affecting thedurability of the five most common in-situ repair methods: sliplining, cured-in-place-pipe,structural spray on lining (sprayed-in-place-pipe), spiral wound lining (grout-in-place-pipe), andfold and form lining (formed-in-place-pipe). A summary of the findings for each method ispresented in tabular form at the end of the paper. The factors that affect the durability of variouspipe materials typically used in the pipe repair methods mentioned above were also researched.After an extensive literature review, it can be concluded that, when compared to the traditionalopen cut pipe replacement method, in-situ technologies cause less disruption to the surroundingenvironment, less inconvenience on the community, and in appropriate applications are morecost effective. This paper is meant only to aid in the decision making process, but not to replaceliterature provided by the manufacturer nor guidelines set forth by local, state or federalagencies.
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