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原文传递 Material Selection and Design Consideration for Moisture Damage of Asphalt Pavement.

题名：	Material Selection and Design Consideration for Moisture Damage of Asphalt Pavement.
作者：	kim, y. lutif, j. e. s.
关键词：	moisture content, damage assessment, design, hot mix paving mixtures, lime, aggregates, tensile strength, road materials, nebraska, performance evaluation, testing
摘要：	Moisture damage is a primary mode of distress occurring in Nebraska hot mix asphalt (HMA) pavements. The use of hydrated lime has been recommended for Nebraska HMA pavements to mitigate moisture-related damage. There are several techniques of introducing hydrated lime into HMA mixtures, but the effects of hydrated lime in terms of its physical/chemical and/or mechanical mechanisms on moisture damage resistance to HMA pavements have not been fully understood. Somewhat arbitrarily one percent of lime addition by total weight of dry aggregates in a mix has been applied. Research is needed to better understand moisture damage mechanisms and to evaluate the effects of additives including hydrated lime as moisture damage resisting agents. To this end, various performance testing such as asphalt pavement analyzer (APA) testing under water, Hamburg testing under water, and AASHTO T-283 tensile strength ratio evaluation with different freeze-thaw cycles, and some fundamental property measurements of mix components based on dynamic shear rheometer (DSR) testing, micromechanical fracture-damage testing, and surface energy testing of asphalt mastics and aggregates were conducted. Testing data and analyses demonstrated that hydrated lime contributed to moisture damage resistance due to synergistic effects of mastic stiffening and advanced bonding characteristics at mastic-aggregate interfaces. However, a well-controlled lime treatment to maximize distribution and dispersion of lime particles onto aggregate surfaces would be required. / Supplementary Notes: See also PB2001-105354. Sponsored by the Federal Highway Administration, Washington, DC. / Availability Note: Available on CD-ROM and in color paper copy only. 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：	u0715；70p
报告类型：	科技报告