Asphalt Definitions and Terms

Home Knowledge Base Asphalt Terms Open-Graded Asphalt Friction Course

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Open-Graded Asphalt Friction Course

Open-graded asphalt friction course is a pavement surface course consisting of a high-void asphalt plant mix that permits rapid rainwater drainage through the course and out the shoulder. A large percentage of one-sized coarse aggregate characterizes the mixture. This course prevents tire hydroplaning and provides a skid-resistant pavement surface.