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Materials, Specifications, and Construction Techniques for Heavy-Duty Flexible Bases: Literature Review and Status Report on Experimental Sections. Technical rept. (Sept 2001-Aug 2002).
| 题名： | Materials, Specifications, and Construction Techniques for Heavy-Duty Flexible Bases: Literature Review and Status Report on Experimental Sections. Technical rept. (Sept 2001-Aug 2002). |
| 作者： | HEFER, A.; SCULLION, T. |
| 关键词： | *Highway-construction; *Flexible-pavements.;Granular-materials; Specifications-; Aggregates-; Pavement-damage; Cracking-Fracturing; Moisture-content; Weather-conditions; Temperature-effects; Texas-; Performance-tests; Road-materials; Literature-reviews. |
| 摘要： | For the majority of the Texas highways the granular base layer is the main structural component of the pavement system. Project 0-4358 was initiated to provide TxDOT guidelines to improve its base specifications in order to better withstand the demands of future traffic loads. This report provides the results of a literature search and a survey of the performance of experimental heavy-duty base pavements recently constructed in Texas. Base specifications and construction practices from eight U.S. DOTs and two overseas countries were compared with TxDOT current and proposed specifications. Currently, TxDOT is the only agency that does not control the amount of fines (minus 200 fraction) in its bases. Research studies have indicated that high levels of minus 200 can severely impact both moisture susceptibility and cold weather performance. The newly proposed TxDOT specifications with limits on the fines content are in line with the practices of other agencies in similar climates. |
| 报告类型： | 科技报告 |
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