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原文传递 Mechanistic Comparison of Wide-Base Single Versus Standard Dual Tire Configurations.

题名：	Mechanistic Comparison of Wide-Base Single Versus Standard Dual Tire Configurations.
作者：	Priest-Angela-L; Timm-David-H
关键词：	Accuracy-; Asphalt-pavements; Data-collection; Field-studies; Florida-Department-of-Transportation; Friction-; Friction-measurement; Friction-number; Locked-wheel-testers; Performance-measurement; Pre
摘要：	The present state-of-the-art locked wheel testers for roadway surface friction evaluation are fully automated. As with any testing using subject-driven instrumented devices, the major concerns of the end usefulness of the resulting data are accuracy and precision. Although a level of uncertainty is always inherent in any measurement process, it also must be appropriately quantified or assessed. Therefore, the Florida Department of Transportation (FDOT) initiated a field study to assess the level of precision of its own locked wheel testers for field measurements. Friction measurements were acquired with four friction locked wheel testers concurrently on a number of asphalt section sites. These test sections were randomly selected to include both open and dense-graded surface mixtures. The collected friction data were first analyzed to determine the friction characteristics at each test location in terms of a friction number at 40 mph with a standard ribbed (FN40R) and smooth tire (FN40S). The results were then used as the basis for an evaluation of the repeatability (within-unit precision) and reproducibility (between-unit precision) of the friction units.
总页数：	Transportation Research Record: Journal of the Transportation Research Board. 2006. (1949) pp137-147 (2 Phot., 6 Fig., 2 Tab., 2 Ref.)
报告类型：	科技报告