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原文传递 MICROSURFACING: SOLUTION FOR DETERIORATED FREEWAY SURFACES.

题名：	MICROSURFACING: SOLUTION FOR DETERIORATED FREEWAY SURFACES.
作者：	Kazmierowski-TJ; Bradbury-A
关键词：	ONTARIO-CANADA; FREEWAYS-; MICROSURFACING-; DEMONSTRATION-PROJECTS; PAVEMENT-CRACKING; RAVELING-; REHABILITATION-; DESIGN-; TEST-METHODS; MATERIAL-PROPERTIES; CONSTRUCTION-; PAVEMENT-PERFORMANCE
摘要：	Many of Ontario's freeway surfaces are showing signs of premature surface deterioration in the form of map cracking, raveling, and coarse aggregate loss associated with the use of 100% steel slag coarse and fine aggregates in the hot-mix wearing course. The majority of these freeways will require rehabilitation within the next few years. The Ministry of Transportation of Ontario has reviewed various alternatives for increasing the service lives of these pavements before major rehabilitation becomes a necessity. One alternative strategy was to use microsurfacing to seal, level, and provide a thin, durable, skid-resistant wearing surface. In 1991 the Ministry undertook two demonstration projects to determine if microsurfacing would extend the lives of freeways exhibiting this type of premature surficial deterioration. The project on Highway 401 exhibited very severe map (block) cracking and raveling. The Highway 403 project exhibited severe map (block) cracking throughout the entire length of the project and slight to moderate raveling in some areas. Two contractors using two different microsurfacing systems placed a 3-km four-lane trial section on Highway 403. On the Highway 401 project one contractor placed two 500-m sections over two lanes. The annual average daily traffic at the trial locations was approximately 15,000, with 15 to 25% commercial traffic. The design, testing procedures, material characteristics, construction, and short-term performance of the microsurfacing systems that were placed are described. The viability of microsurfacing as a surficial rehabilitation treatment under freeway conditions is also discussed.
总页数：	Transportation Research Record. 1995. (1473) pp120-130 (8 Fig., 6 Tab., 8 Ref.)
报告类型：	科技报告