Evaluation of latex polymers to resist stripping in asphalt pavements in Oregon : final report.
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2005-03-01
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Abstract:This study assessed the effectiveness of latex polymer anti-stripping treatment by inspecting and evaluating the
condition of pavements constructed in Oregon from 1997-2001. Ten hot mix asphalt concrete paving projects
were identified throughout the state. Five of the projects used hydrated lime as an anti-stripping additive, and five
used latex polymer (UP-5000) as an anti-stripping additive. Each paving project that used UP-5000 as an antistripping
additive was compared to a paving project that used hydrated lime as an additive. Both sites being
compared shared similar aggregate sources.
Condition surveys were conducted on all of the sites, and in-service cores were taken from each project. The
cores were tested using the AASHTO T 283 test method to determine the Tensile Strength Ratio (TSR). The TSR
and condition ratings were used to assess the effectiveness of the UP-5000 compared to hydrated lime.
Based on the condition surveys, and the TSR testing, the UP-5000 was shown to be comparable to hydrated lime
in preventing moisture induced distress in hot mix asphalt pavements in Oregon.
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