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原文传递 Sustainable Perpetual Asphalt Pavements and Comparative Analysis of Lifecycle Cost to Traditional 20-Year Pavement Design: Project Summary

题名：	Sustainable Perpetual Asphalt Pavements and Comparative Analysis of Lifecycle Cost to Traditional 20-Year Pavement Design: Project Summary
作者：	Lee, S. I.; Walubita, L. F.; Hu, S.; Scullion, T.
关键词：	Life cycle cost analysis (LCCA)##Conventional flexible pavement##Mechanistic-Empirical Design Procedures##Perpetual pavement##Endurance limit (EL)##M-E design##Conventional rigid pavement##Recommendations##20-Year Pavement Design##
摘要：	Perpetual pavement (PP), especially appropriate for heavily trafficked highways, is defined as a long-lasting thick hot-mix asphalt (HMA) pavement structure with a service life in excess of 50 years without major structural rehabilitation and/or reconstruction activities. Since 2001, Texas has designed and constructed 10 PP sections on the heavily truck-trafficked IH 35 corridor and SH 114 in Fort Worth. With the oldest section having a service life of over 14 years, there is an opportunity to review the existing PP design and construction practices with a view to improving and enhancing the design procedures and, subsequently, recommending the best construction practices for cost-effectiveness. The concern about PP was cost because it was suggested that PP was excessively thick and that its multiple layer lifts of different HMA mixes made PP difficult and expensive to construct. Thus, a critical review of current PP practices and field performance was warranted with recommendations on how to make these PP structures cost-competitive with both conventional flexible pavements and rigid concrete pavements.
总页数：	2
报告类型：	科技报告