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Asphalt surface treatment practice in southeastern United States.
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  • Abstract:
    It costs less to maintain roads in good condition than in poor condition. Pavement preservation is a set of

    activities to extend pavement life, improve safety, and meet road user expectations. Surface treatments are

    pavement preservation treatments applied to the whole surface of the road. This synthesis summarizes surface

    treatments’ state of practice in the United States, especially southeastern states. Eleven pavement preservation

    techniques were addressed: fog seal, rejuvenator seal, chip seal, sandwich seal, scrub seal, slurry seal,

    microsurfacing, cape seal, thin overlays, ultrathin bonded wearing course and crack sealing/filling. Recent

    work on surface treatments has been reviewed and summarized. To research surface treatments’ state of

    practice, a survey was designed and distributed to Southeastern Association of State Highway and

    Transportation Officials (SASHTO) agencies. Nineteen participants from Florida, Georgia, Louisiana,

    Virginia, West Virginia, North Carolina, and Arkansas participated in the survey. The electronic survey

    consisted of three questionnaires asking administrative, technical, and research-related questions. Results

    showed that thin overlays, crack repairs, microsurfacing, chip seal, and fog seal are the most common

    preventative maintenance practices. In this report, each chapter is dedicated to one surface treatment

    technique. Chapters start with a description of the technique, its applications, features, material and equipment

    requirements, and construction procedures. This is followed by a summary of recent work and implementation

    status, as obtained from the survey.

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