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原文传递 Lab Evaluation & Specification Development for Geogrids for Highway Engineering Applications.

题名：	Lab Evaluation & Specification Development for Geogrids for Highway Engineering Applications.
作者：	chehab, g. r. palomino, a. tang, x.
关键词：	geosynthesis, specifications, pavements, highway construction, subgrades, bench scale testing, performance tests, pennsylvania, evaluation, test methods, laboratory tests
摘要：	This report incorporates findings from research performed to evaluate the current specifications of geogrids for use in highway applications, with special emphasis on pavement applications. This project includes a thorough literature review synthesizing uses, specifications, and test methods for geogrid applications to highway construction. Index tests, performance benchmark testing, and accelerated pavement testing using a Mobile Model Load Simulator (MMILS), 1/3 scale, were conducted. The materials tested included eleven geogrid products selected by PennDOT for Index testing; four of the eleven products were also subjected to bench and accelerated performance testing. Standard 2A aggregate and a typical Pennsylvania soil (A-2-4) were used for all tests requiring these materials. A correlation between critical geogrid parameters based on index tests and performance tests is presented. Important geogrid attributes that can influence reinforcing effectiveness were recognized. A geogrid material specification for the most common highway applications, i.e. flexible pavement subgrade reinforcement, embankment reinforcement, and slope reinforcement, was developed. / NOTE: Final rept. 1 Jun 2006-5 Mar 2007. / Supplementary Notes: Sponsored by Pennsylvania Dept. of Transportation, Harrisburg. Bureau of Planning and Research. / Availability Note: Product reproduced from digital image. 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：	u0723；136p
报告类型：	科技报告