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原文传递 Alternative Aggregates and Materials for High Friction Surface Treatments.

题名：	Alternative Aggregates and Materials for High Friction Surface Treatments.
作者：	Wilson, B. T.; Mukhopadhyay, A.
关键词：	High friction surface (HFS), Horizontal curve design, Crash reduction, Skid resistance, Failure mechanism, Benefit cost, Calcined bauxite, polymer resin binder, Thermal compatibility, Coefficient of thermal expansion
摘要：	The State of Florida has used high friction surface treatments (HFSTs) since 2006 to reduce wet weather crashes on tight curves and intersections and to maintain bridge decks; however, the Florida Department of Transportation (FDOT) has reported issues related to premature failure of the treatment. The scope of this project was to: (1) Review the literature and interview industry experts on the state of the practice of HFST; (2) Document all existing HFST projects in Florida and analyze their performance based on distress, skid resistance, and crash reduction; (3) Perform field testing on six projects, evaluating their present performance and conducting forensic analyses as needed; (4) Perform laboratory tests on different aspects of HFST materials and construction practices to improve durability and reduce costs; and (5) Develop a revised HFST specification for Florida and an HFST Guidelines booklet. The research findings include historic costs, project performance histories, identification of failure mechanisms, crash rate reductions for various applications, benefit-cost analyses, trends between aggregate loss and both resin binder type and mil thickness, thermal compatibility measurements, resin binder gel times under non-ideal situations, an HMA design using calcined bauxite, and comparisons of a few high friction aggregates. The researchers recommended many ways to improve the design, construction, and quality control of HFST. These are reflected in the proposed specification Section 333. A new user-friendly booklet, titled “High Friction Surface Treatment Guidelines: Project Selection, Materials, and Construction,” was created to assist contractors and FDOT inspectors to implement the new specification.
总页数：	Wilson, B. T.; Mukhopadhyay, A.
报告类型：	科技报告