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Laboratory Evaluation of Asphalt Rubber Gap Graded Mixture in Sweden

机译:瑞典沥青橡胶间隙分级混合料的实验室评估

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摘要

In this study, a laboratory experimental program was conducted to obtain material properties and performance characteristics for a "Reference Gap" and "Asphalt Rubber (AR) Gap" graded mixtures that were used on the Swedish Malmo E-06 Highway. The advanced material characterization tests included: Dynamic (Complex) Modulus for stiffness evaluation, repeated load for permanent deformation characterization, beam fatigue for crack evaluation, and C* Integral test to evaluate crack propagation. The data was used to compare the performance of the AR Gap Graded mixture to the Reference Gap. The results showed that the AR gap graded mix would provide better resistance to low temperature cracking and permanent deformation. The expected fatigue life for the AR gap graded mixture was higher than the reference mix for the existing highway conditions. Furthermore, the crack propagation tests showed that the AR gap graded mixture has higher resistance to crack propagation.
机译:在这项研究中,进行了一项实验室实验程序,以获取在瑞典马尔默E-06高速公路上使用的“参考间隙”和“沥青橡胶(AR)间隙”分级混合物的材料性能和性能特征。先进的材料表征测试包括:用于评估刚度的动态(复杂)模量,用于永久变形表征的重复载荷,用于裂纹评估的梁疲劳以及用于评估裂纹扩展的C *整体测试。数据用于比较AR Gap分级混合物与Reference Gap的性能。结果表明,AR间隙梯度混合料可提供更好的抗低温开裂和永久变形的能力。在现有的公路条件下,AR间隙分级混合物的预期疲劳寿命高于参考混合物。此外,裂纹扩展测试表明,AR间隙梯度混合料具有较高的抗裂纹扩展性。

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