Rehabilitation of jointed concrete in LTPP Southern region
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The pavements composing the National Highway System are deteriorating as average daily loads continue to rise. Federal, state, and municipal agencies need greater confidence that rehabilitation options will provide the level of service required for the design life of the treatment. Little information exists to allow qualitative comparisons of the performance of rehabilitation treatments. The objective of this study is to compare the performance of rehabilitated jointed concrete pavements, and draw qualitative conclusions as to reasonable expectations for each of the treatment types reviewed. This paper qualitatively compares control section (no treatment) performance to rehabilitated section performance from four project sites under study as part of the Long Term Pavement Performance (LTPP) Specific Pavement Studies (SPS) Experiments. Project sites are located in Alabama, Arkansas, Oklahoma and Tennessee. The primary approach adopted is the development of graphs and tables of performance indicators versus time. The performance indicators analyzed pavement distress evaluated with distress surveys, and ride condition index. Each of the test sections was in service at the beginning of monitoring, and at the time each of the rehabilitation operations were performed. Initial properties of the in service pavements were measured at the starting date of the experiments including pavement distress and international roughness index. The study also accounts for variables such as location, environment, traffic history, and construction history for each test section.
