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原文传递 CEMENT-STABILIZED OPEN-GRADED BASE STRENGTH TESTING AND FIELD PERFORMANCE VERSUS CEMENT CONTENT.

题名：	CEMENT-STABILIZED OPEN-GRADED BASE STRENGTH TESTING AND FIELD PERFORMANCE VERSUS CEMENT CONTENT.
作者：	Hall-M
关键词：	CEMENT-STABILIZED-OPEN-GRADED-BASE-COURSES; TEST-METHODS; FIELD-PERFORMANCE; CEMENT-CONTENT; COMPRESSIVE-STRENGTH-TESTS; SPLITTING-TENSILE-TEST; PERMEABILITY-MEASUREMENT; HAUL-ROADS
摘要：	Explored in this study is the use of cement-stabilized open-graded base (CSOGB) to provide a drainage system and construction platform for concrete pavements. Objectives were to (a) assess concrete testing methods for CSOGB and (b) examine cement content versus performance under construction traffic. Modified concrete testing methods were used to sample, fabricate, cure, and test cylinders, beams, and cores prepared on site. Large sample sizes were used, specimens were compacted by surface tamping, cylinders were cured in plastic molds, and loading rates were reduced. Laboratory-cured compressive and bending, field-cured compressive and split tensile, and core split tensile and permeability tests were conducted. Strength tests were performed successfully and yielded reasonably consistent results. Permeability was successfully measured using a modified New Jersey falling head permeability apparatus. Low, medium, and high cement content material was placed on grade and used as a haul road during paving. The condition of the CSOGB was monitored during construction and trucks, both loaded with concrete and empty, were counted. Performance under load was found to depend on cement content, truck traffic, sub-layer stability, segregation, and surface irregularities. A cement content of 1163 N/cu m (200 lb/cu yd) was suitable for general use, 873 N/cu m (150 lb/cu yd) was adequate for low trucking volumes, and 1454 N/cu m (250 lb/cu yd) was appropriate for high trucking volumes or poor support conditions.
总页数：	Transportation Research Record. 1994. (1440) pp22-31 (6 Fig., 4 Tab., 3 Ref.)
报告类型：	科技报告