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原文传递 Development of an Acceptance Test for Chip Seal Projects

题名：	Development of an Acceptance Test for Chip Seal Projects
作者：	Ozdemir, U.; Hibner, D.; Kutay, M. E.; Kumbargeri, Y.; Lanotte, M.
关键词：	MICHIGAN (STATE)##Chip seal##Embedment depth##Sand patch test##Aggregate application##Implementation##Recommendations##Safety analaysis##Image processing##Development##Binder aggregate interface##Performance##Michigan Department of Transportation (MDOT)##
摘要：	Chip seals are among the most popular preventive maintenance techniques implemented by many DOTs, county road departments and cities. The deteriorated pavement surface is sprayed with an asphalt emulsion or binder, and then a layer of uniformly-graded aggregates is spread and compacted. Curing is required before opening the road to traffic to enhance bonding between aggregate particles and asphalt bitumen. Percent embedment of aggregate particles into the thin bituminous layer is one of the most significant parameters affecting the performance of asphalt chip seals. Bleeding or aggregate loss may be encountered in chip seal applications depending on the aggregate percent embedment. The main objective of this research project was to develop a standard test procedure to directly calculate the aggregate percent embedment into the asphalt binder in a chip seal project via digital image analysis. Three image analysis algorithms were developed and used to analyze chip seal samples. Forty-eight (48) chip seal cores were collected from eight different locations in Michigan and analyzed. Moreover, forty (40) laboratory samples were fabricated to investigate the impact of the binder and aggregate application rates on the percent embedment. The analyses were performed using the sand patch test, laser texture scanning and the image-based algorithms developed as part of this project. Performance of chip seal samples were also evaluated using sweep tests performed on the laboratory and field samples. Software, named CIPS, has been developed and it represents one of the primary outputs of this project. This software and the procedure developed herein can be used by road agencies and contractors as an acceptance test for chip seal projects.
总页数：	95
报告类型：	科技报告