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首页> 外文会议>Asphalt Rubber 2009 Conference(2009国际橡胶沥青大会） >Evaluation of Alternative Laboratory Aging Methods of Asphalt Rubber Friction Courses
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Evaluation of Alternative Laboratory Aging Methods of Asphalt Rubber Friction Courses

机译：评估沥青橡胶摩擦过程的替代实验室老化方法

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Long term aging, or the oxidation and subsequent stiffening of hot mix asphalt (HMA) mixtures, is a contributing cause of the pavement's performance loss. Laboratory testing protocols simulating field aging characteristics, such as SHRP-A-417, have been developed to test asphalt mixtures in order to evaluate their aging resistance in the field. However, the SHRP-A-417 protocol requires some specialized equipment to age open graded mixtures. This study focused on evaluating alternative aging methods for Asphalt Rubber Friction Course (ARFC) mixtures. Compacted laboratory specimens (cores) as well as loose mixtures (pan) were aged under similar temperatures and time durations. Aging effects were assessed using the E* dynamic modulus test and the modular aging ratio developed in this study. Specimen geometry, air voids, and compaction parameters were also examined before and after the aging process to evaluate the effectiveness of the aging procedures. The core aging procedure proved to be a better alternative to the pan aging method; pan aging was ineffective in simulating aging characteristics.
机译：长期老化，或热混合沥青（HMA）混合物的氧化和随后的硬化，都是造成人行道性能下降的原因。已开发出模拟现场老化特性的实验室测试协议，例如SHRP-A-417，以测试沥青混合料，以评估其在现场的耐老化性。但是，SHRP-A-417协议需要一些专用设备来老化开放级混合物。这项研究的重点是评估沥青橡胶摩擦过程（ARFC）混合物的替代老化方法。压实的实验室标本（芯）以及松散的混合物（锅）在相似的温度和持续时间下老化。使用E *动态模量测试和本研究开发的模块化老化率评估了老化效果。还在老化过程之前和之后检查了试样的几何形状，气隙和压实参数，以评估老化程序的有效性。事实证明，岩心老化程序可以替代平底锅老化方法。锅老化对模拟老化特性无效。

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