详情

原文传递 SAMPLING LOCATION IMPACT ON MEASURED ASPHALT CONTENT OF HOT MIX ASPHALT.

题名：	SAMPLING LOCATION IMPACT ON MEASURED ASPHALT CONTENT OF HOT MIX ASPHALT.
作者：	Abu-Hassan-M
关键词：	Air-voids; Asphalt-content; Asphalt-pavements; Binders-; Cracking-; Hot-mix-paving-mixtures; Impacts-; Location-; Pavement-performance; Sampling-; Segregation-Aggregates
摘要：	In May 2000, the Colorado Department of Transportation (CDOT) requested a forensic study of a project located on I- 25 north of Denver. The request was made because, within a year of the 1997 overlay, longitudinal cracking appeared in the surface. Transverse cracks were attributed to reflective cracking. However, the longitudinal cracks appeared to be surface initiated. In October 2000, a forensic team reviewed the project and established a sampling and testing plan to take cores from the roadway. Based on data analysis of the cores, the higher than expected in-place air voids, the low effective asphalt, and segregation within the mat, all contributed to the early cracking. The forensic team suggested that CDOT investigate the sampling locations for hot mix asphalt (HMA) that are allowed by Colorado Procedure 41 (CP41) to determine if all locations provide statistically equivalent asphalt contents. This study indicates that there is no statistically significant difference in asphalt content of the allowed CDOT sampling locations. This study suggests that no changes are needed to CP41 for sampling all hot mix asphalt.
总页数：	2002/11. pp37 (3 App.)
报告类型：	科技报告