United States Department of Transportation
i
Design and Rehabilitation Strategies for Permeable Friction Course Pavements
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2024-08-01
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[PDF-11.09 MB]
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Edition:September 2021–July 2023
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Abstract:Thousands of miles of permeable friction course (PFC) pavements have performed well for the last 10 to 15 years on Texas highways. PFC pavement reduces hydroplaning, splash and spray, and pavement noise and improves ride quality and safety in wet weather. Hundreds of miles of PFC pavements are now at the end of their service life and need to be rehabilitated. The most common distress observed is raveling. To date, the most widely used method of rehabilitating PFC pavement is to mill the existing layer and replace it with a new wearing layer. This is also the most conservative and most expensive rehabilitation strategy. This project focused on determining if there are less expensive resurfacing options that do not include milling. PFC pavements have many safety-related advantages, but their use is on the decline because of the excessive cost of replacement. The research team conducted a review of literature and state specifications as well as an online survey of Texas Department of Transportation districts to establish the current state of the practice; emerging research and technologies on the design, testing, maintenance, and rehabilitation of PFC pavements; and various laboratory and field techniques that could aid in selecting PFC maintenance and/or rehabilitation options. Different material types and rejuvenator rates were considered to understand their effect on durability and friction. Field performance evaluations of resurfaced PFC pavements were conducted. PFC pavements nearing the end of their life were evaluated as candidate test sections. Three test sections were constructed with a rejuvenating fog seal aimed at extending the life of the PFC, a hot-mix overlay placed over an aged PFC, and a seal coat applied on another aged PFC. Guidelines were developed for the maintenance and rehabilitation of PFCs. These guidelines focus on how to evaluate a PFC to determine if it still functions as a permeable layer, and a decision tree is provided to offer guidance on maintenance and rehabilitation options.
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