Long term validation of an accelerated polishing test procedure for HMA pavements.
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Long term validation of an accelerated polishing test procedure for HMA pavements.

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  • Abstract:
    The Ohio Department of Transportation (ODOT) has set strategic goals to improve driving safety by maintaining

    smooth pavement surfaces with high skid resistance. ODOT has taken the initiative to monitor pavement

    friction on Ohio roadways and remedy the pavement sections with low skid resistance. However, this is a

    passive and reactive approach toward the problem. A more proactive approach would be to test hot mix asphalt

    (HMA) in the laboratory during the mix design stage to ensure that the aggregates used will provide adequate

    friction over the life of the pavement. With the validity of a research-grade polishing machine established in a

    previous study, ODOT has initiated this project to conduct a long-term field study to collect field performance

    data over a longer time period. The research effort was aimed at further validating the applicability of the

    previously developed laboratory test protocol and acceptance criteria through a correlation and comparison

    study with long-term field performance data. This research has produced the following deliverables: (a) a new

    commercial grade accelerated polishing machine called “The Polisher,” (b) models for predicting the field

    performance of asphalt pavement friction under traffic, and (c) supplemental notes with draft specifications for

    polishing HMA samples and for testing friction properties. The commercial grade polishing machine and the

    supplemental notes were recommended for ODOT implementation.

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