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Study on the Fatigue Characteristics and Remaining Fatigue Life Prediction of Field Emulsified Asphalt Cold Recycled Mixture

机译:乳化沥青冷再生混合料的疲劳特性及剩余疲劳寿命预测研究

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The main objective of this study was to evaluate the fatigue characteristics and remaining fatigue life of field emulsified asphalt cold recycled (EACR) mixture. In this study, the field EACR mixture specimens were cored from car and truck lanes that suffered different traffic loads. The specimens then underwent the indirect tensile strength test and indirect tensile fatigue test. Moreover, field hot mix asphalt (HMA) mixture which covered the EACR mixture was also tested for comparison. Test results indicate that difference in traffic loads has almost no effect on the indirect tensile strength of mixtures irrespective of mixture type. Fatigue test results indicate that more traffic loads will lead to greater reduction in fatigue life for both EACR mixture and HMA mixture. In addition, an analytical method based on laboratory and field correlations was developed to determine the shift factor for predicting the remaining fatigue life of field EACR mixture as well as HMA mixture. In this study, the shift factor values of EACR mixture and HMA mixture were calculated as 107.16 and 13.71, respectively.
机译:这项研究的主要目的是评估现场乳化沥青冷再生(EACR)混合物的疲劳特性和剩余疲劳寿命。在这项研究中,现场EACR混合标本取自遭受不同交通负荷的汽车和卡车车道。然后对样品进行间接拉伸强度测试和间接拉伸疲劳测试。此外,还测试了覆盖EACR混合物的现场热拌沥青(HMA)混合物进行比较。测试结果表明,无论混合物类型如何,交通负荷的差异对混合物的间接拉伸强度几乎没有影响。疲劳测试结果表明,更多的交通负荷将导致EACR混合气和HMA混合气的疲劳寿命大大降低。此外,开发了一种基于实验室和现场相关性的分析方法,以确定用于预测现场EACR混合物以及HMA混合物的剩余疲劳寿命的偏移因子。在这项研究中,EACR混合物和HMA混合物的移动因子值分别计算为107.16和13.71。

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