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原文传递 Evaluation of Performance and Life Cycle Cost of Hot Mix Asphalt (HMA) Pavements of Different Thickness.

题名：	Evaluation of Performance and Life Cycle Cost of Hot Mix Asphalt (HMA) Pavements of Different Thickness.
作者：	Mallick-R.B.; Bhattacharjee-S.; Mallick-R.B.
关键词：	Hot-mix-asphalt; Pavements-.;Performance-evaluation; Life-cycle-costs; Thickness-; Slabs-; Cracking-Fracturing; Rutting-; Fatigue-tests; Loads-Forces; Strain-gauges.
摘要：	In this report, studies of accelerated pavement testing have been discussed and the relative advantage of using the Model Mobile Load Simulator 3 (MMLS3) has been illustrated. A test protocol of using MMLS3 as a fatigue characterization tool has been proposed and validated by testing several Hot Mix Asphalt slabs. Data acquisition was performed with strain gauges placed in different directions under slabs in controlled environmental conditions. Analysis of data showed the effect of wheel load on fatigue behavior of pavement in terms of strain history response, cracking and reduction of modulus. Performance curves showing relation between initial strain and failure loads were developed and were compared with performance curves obtained from standard method. It has been showed that rutting related excessive permanent strain due to movement of particles under wheel path can effect affect fatigue performance of Hot Mix Asphalt pavement. Method of estimation of time dependent strain has also been developed to predict observed strain. The strain versus allowable load repetition relationship developed for a typical Maine Department of Transportation project was used to develop and compare life cycle costs of Hot Mix Asphalt pavements with different thickness. It was demonstrated that an increase in HMA thickness results in significant savings in life cycle cost.
报告类型：	科技报告