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原文传递 Evaluation of Drainable Bases Under Asphalt Pavements.

题名：	Evaluation of Drainable Bases Under Asphalt Pavements.
作者：	liang, r. y.
关键词：	drainage, monitoring, resilient modulus, soils, laboratory tests, hydraulic conductivity, design, construction, structural analysis, stability, aggregates, deformation, ohio, pumping, rutting, saturation, research project
摘要：	Providing adequate drainage to a pavement system has been considered as an important design consideration to prevent premature failures due to water related problems such as pumping action, loss of support, and rutting, among others. As a result, permeable bases with drainage efficiency and structural stability characteristics have been widely used by several state DOTs in the design and construction of pavements. Ohio Department of Transportation has adopted several types of materials specifications for use as permeable bases: (a) ODOT 307 base, including IA, NJ, and CE types, (b) ODOT 306 Cement Treated Base, (c) ODOT 308 Asphalt Treated Base. However, the effectiveness of these permeable base materials has not been conclusively established in previous ODOT studies, including DEL-23 and LOG-33. In LOG-33, nondiscernable difference in pavement performance has been observed for pavements with different types of permeable base materials. In DEL-23, high ground water table at the pavement location has resulted in full saturation of subgrade soils due to capillary action. Out of concerns with results from DEL-23 and LOG-33 projects, ODOT implemented a moratorium, in March 2001, to suspend the use of the drainable bases for any new or rehabilitation pavement construction. On the other hand, other states such as Missouri, Mississippi, Alaska, Iowa, Indiana, Alabama, California, Alabama, California, Kansas, and Kentucky have continuously used the drainable base. It was decided that a research project be carried out to provide additional data to assess the merits of the drainable bases in the asphalt pavement. / Supplementary Notes: Sponsored by Ohio Dept. of Transportation, Columbus. and Federal Highway Administration, Columbus, OH. Ohio Div. / Availability Note: Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA.
总页数：	u0724；604p
报告类型：	科技报告