United States Department of Transportation
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Application of a Laser Scanning System to Dynamic Friction Test Specimens: Correlation Between Texture and Friction
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2018-10-01
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[PDF-1.55 MB]
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Edition:March 2018–August 2018
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Abstract:In this implementation effort, a laser-based scanning system was adapted to test aggregates from five sources before and after Micro-Deval abrasion and embedded in a ring-shaped polyester material. Improvements to the ring-shaped specimen preparation procedure were identified. The Aggregate Ring Texturing System (ARTS) hardware and software were used on the aggregate ring-shaped specimens along with the dynamic friction tester (DFT) to obtain micro-texture and friction characteristics. The results allowed generating a model to predict friction at 60 km/h (DFT₆₀) from the micro mean profile depth results obtained with the ARTS. The aggregates from the various sources were ranked based on their texture and friction characteristics, and showed that igneous and gravel aggregates had superior micro-texture and friction performance as compared to dolomite and limestone. This type of analysis is geared toward improving the Texas Department of Transportation’s existing surface aggregate classification system.
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