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Abstract:Maine highways have been showing signs of longitudinal joint failure for a number of
years. In an effort to reduce the amount of joint failures the Maine Department of
Transportation (MDOT) is currently evaluating two projects. One project is monitoring the
results of using multiple rolling techniques and a proprietary precompaction device. The other
project is developing a longitudinal joint density specification for Superpave mixes.
This experimental project will evaluate the application of a joint sealer and joint adhesive
in an effort to reduce the amount of longitudinal joint separation.
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