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Effect of Various Warm-Mix Technologies on the Stiffness and Rutting Characteristics of Asphalt Concrete

机译：多种温拌技术对沥青混凝土刚度和车辙特性的影响

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Viscoelastic material functions of warm-mix asphalt are not well defined yet for reasons like relatively newer technology in United States and also varies with different technologies. The rutting performances of warm-mix asphalt are also relatively new. This study evaluates the effects of different warm-mix agents on the viscoelastic material functions and rutting performance of asphalt concrete. A control hot-mix asphalt and three warm-mix asphalt mixtures were collected from manufacturing plant with identical aggregate type, size distribution, and binder grade. The loose asphalt-aggregate mixtures are compacted, cored and sawed to cylindrical specimens for dynamic modulus and rutting resistance testing. A numerical method is used to convert complex modulus function to relaxation modulus and creep compliance. In essence, the warm-mix asphalt with water-free chemical agent showed higher stiffness characteristics. However, the warm-mix asphalt with surfactant-based WMA technology is found to be superior in terms of rutting performance, whereas, the warm-mix asphalt with water-free chemical agent is found to be inferior.
机译：由于诸如美国相对较新的技术之类的原因，尚未对热拌沥青的粘弹性材料功能进行很好的定义，并且其随不同技术而变化。温拌沥青的车辙性能也相对较新。这项研究评估了不同的热拌剂对沥青混凝土粘弹性材料功能和车辙性能的影响。从制造厂收集了相同的骨料类型，粒度分布和粘结剂等级的对照热拌沥青和三种温拌沥青混合物。将疏松的沥青-骨料混合物压实，去芯并锯成圆柱形样品，以进行动态模量和耐车辙试验。使用数值方法将复数模量函数转换为张弛模量和蠕变柔量。本质上，具有无水化学试剂的温拌沥青显示出更高的刚度特性。然而，发现具有基于表面活性剂的WMA技术的热拌沥青在车辙性能方面是优异的，而发现具有无水化学试剂的热拌沥青则较差。

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