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首页> 外文期刊>Sustainability >Fatigue Properties of Cold-Recycled Emulsified Asphalt Mixtures Fabricated by Different Compaction Methods
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Fatigue Properties of Cold-Recycled Emulsified Asphalt Mixtures Fabricated by Different Compaction Methods

机译：不同压实方法制备的冷再生乳化沥青混合物的疲劳性能

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This paper focuses on investigating the fatigue properties of cold-recycled emulsified asphalt mixtures (CEAMs) designed via two different compaction methods. First, two different CEAM compaction procedures were investigated and evaluated, including the modified Marshall compaction method (MMCM) and the vertical vibration testing method (VVTM). Indirect tensile fatigue tests were then performed to research the fatigue lives of CEAMs fabricated via the two methods. Finally, a Weibull distribution was applied to analyze the fatigue test results, and the fatigue equation was constructed. The results indicated that the average mechanical strength ratio between the CEAM samples produced by VVTM and the field core samples was 92%, whereas the average ratio of the specimens shaped by the MMCM was 65%. Compared with MMCM-molded CEAMs, VVTM-fabricated CEAMs showed decreased optimal moisture and emulsified asphalt contents by 11% and 9%, respectively, but exhibited improved moisture stability, anti-cracking performance, and anti-rutting performance by 4%, 12%, and 35%, respectively. The fatigue equations established on the basis of the Weibull distribution could effectively assess the fatigue life of CEAMs. The VVTM-manufactured CEAMs showed good resistance of stress change sensitivity and fatigue failure under different stress ratios. The VVTM-compacted CEAMs demonstrated increased fatigue life by 36% at a stress ratio of 0.45 and by 325% at a repeated load of 0.27 MPa compared with the MMCM-fabricated CEAMs.
机译：本文侧重于调查通过两种不同的压实方法设计的冷再循环乳化沥青混合物（CIEM）的疲劳性能。首先，研究了两种不同的CIEM压实程序，并评估，包括改进的MARSHALL压实方法（MMCM）和垂直振动测试方法（VVTM）。然后进行间接拉伸疲劳试验以研究通过两种方法制造的疲劳寿命。最后，应用了威布尔分布以分析疲劳试验结果，构建疲劳方程。结果表明，VVTM产生的CEM样品与现场核心样品之间的平均机械强度比> 92％，而MMCM的样品的平均比例<65％。与MMCM成型的CIEMS相比，VVTM制造的CIEM分别显示出最佳的水分和乳化沥青含量降低11％和9％，但表现出改善的水分稳定性，抗裂解性能和抗轨道性能，减少4％，12％分别为35％。基于Weibull分布的疲劳方程可以有效地评估CIEMS的疲劳寿命。 VVTM制造的CEAMS显示出良好的应力变化敏感性和疲劳失效的良好阻力在不同的应力比率下。与MMCM制造的CIEM相比，VVTM压实的CEAMS以0.45的应力比和0.27MPa的重复载荷的应力比增加了36％的疲劳寿命增加了36％。

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