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Evaluation and Modeling of Repeated Load Test Data of Asphalt Concrete for Mechanistic-Empirical Pavement Design

机译:机械-经验路面设计的沥青混凝土重复荷载试验数据评估与建模

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摘要

The Mechanistic-Empirical Pavement Design Guide (MEPDG) made available by the National Cooperative Highway Research Program in 2004 uses a power model that incorporates dynamic modulus (DM) as a factor in predicting rutting performance of asphalt concrete. The rutting model is empirical and the rutting profiles obtained from the model are based largely on the adjustment of calibration constants, not the DM. Various DM values would be capable of producing similar rutting profiles based on the current model. This study evaluates using accumulated strain data obtained from the Repeated Load Test (RLT) as an alternative to using DM. In addition, a model to represent the accumulated strain data obtained from the RLT is developed. The accuracy and behavior of the current model and the model developed in this study in representing a mix from Louisiana are compared. Alternatives for incorporating the RLT data into the MEPDG are also presented.
机译:国家合作高速公路研究计划(National Cooperative Highway Research Program)在2004年发布了《机械-经验路面设计指南》(MEPDG),该模型使用了包含动态模量(DM)作为预测沥青混凝土车辙性能的因素的功率模型。车辙模型是经验性的,从该模型获得的车辙轮廓主要基于校准常数的调整,而不是基于DM的调整。基于当前模型,各种DM值将能够产生相似的车辙轮廓。这项研究评估使用从重复载荷测试(RLT)获得的累积应变数据作为使用DM的替代方法。另外,开发了代表从RLT获得的累积应变数据的模型。比较了当前模型的准确性和行为以及在本研究中开发的代表路易斯安那州混合模型的模型。还介绍了将RLT数据合并到MEPDG中的替代方法。

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