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原文传递 HEAVY-DUTY ASPHALT PAVEMENTS IN PENNSYLVANIA: EVALUATION FOR RUTTING.

题名：	HEAVY-DUTY ASPHALT PAVEMENTS IN PENNSYLVANIA: EVALUATION FOR RUTTING.
作者：	Kandhal-PS; Cross-SA; Brown-ER
关键词：	ASPHALT-PAVEMENTS; HEAVY-DUTY-PAVEMENTS; RUTTING-; PAVEMENT-PERFORMANCE; CORE-ANALYSIS; PROJECT-DATA; RUT-DEPTH; MIX-DESIGN; DATA-ANALYSIS; LINEAR-REGRESSION-ANALYSIS; MULTIVARIATE-ANALYSIS; RECOMMENDATIONS-; COMPACTION-; AIR-VOIDS-CONTENT; QUALITY-CONTROL
摘要：	Thirty-four heavy-duty asphalt pavements encompassing poor to excellent rutting performance were evaluated. The objective was to identify the pavement properties (materials, mixture design, construction, and postconstruction) that typify good- and bad-performing pavements. Eleven pavement cores were obtained from each pavement to determine in-place voids in the total mix, mix composition, coarse aggregate fractured face count, fine aggregate particle shape and texture, and recovered asphalt cement properties. The mix from the pavement cores was heated and recompacted using three compactors: gyratory testing machine, rotating base/slanted foot mechanical Marshall compactor, and static base conventional mechanical Marshall compactor. All project data such as job-mix formula, construction data, and traffic data were obtained. Rut depths were measured on each project using a profilograph device. Some 60 independent variables covering the mix design, construction, and postconstruction for each pavement were selected to determine their effect on the rut depth (dependent variable). The extensive data were analyzed using correlation analysis, linear regression analysis methods, and stepwise multiple variable analysis methods. A rutting model was also developed. Recommendations were made to the Pennsylvania Department of Transportation to improve and optimize the resistance of asphalt paving mixtures to rutting for heavy-duty pavements. The main recommendations are (a) use at least 75% crushed sand in the fine aggregate, (b) use 75 blows per side compactive effort using a rotating base/slanted foot Marshall compactor, (c) design mix with at least 4.0% air voids, and (d) improve production quality control to ensure that the mixes "as placed" are reasonably close to the mixes "as designed".
总页数：	Transportation Research Record. 1993. (1384) pp49-58 (7 Fig., 5 Tab., 4 Ref.)
报告类型：	科技报告