Assessing asphalt mixture moisture susceptibility through intrinsic adhesion, bitumen stripping and mechanical damage
Assessing asphalt mixture moisture susceptibility through intrinsic adhesion, bitumen stripping and mechanical damage
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DOI：
10.1080/14680629.2013.863162
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发表时间：
2014-01-02
影响因子：
3.7
通讯作者：
Airey, Gordon
中科院分区：
文献类型：
--
作者：
Grenfell, James;Ahmad, Naveed;Airey, Gordon
耐久性是沥青混合料最重要的性能之一。水损害是影响沥青路面耐久性的一个重要因素。水分损害通常被认为是两种主要机制的结果;沥青和骨料之间的粘附性损失以及混合物内的内聚力损失。评估水分损害的常规测试方法包括对松散沥青涂层骨料进行的测试和对压实沥青混合物进行的测试。本文着眼于从滚瓶和饱和老化拉伸刚度（SATS）测试的结果，试图更好地了解潜在的过程和机制的水分损害的帮助下，表面能测量的组成沥青和骨料。使用滚瓶和SATS测试评估材料的组合。使用动态接触角分析仪测量粘合剂的表面能性质，使用动态蒸汽吸附装置测量聚集体的表面能性质。从这些表面能的测量，它是可能的，以预测简单的滚瓶测试和更复杂的SATS测试的相对性能。使用矿物释放分析仪测定的骨料的矿物学组成被用来解释所考虑的混合物的性能的差异。
Durability is one of the most important properties of an asphalt mixture. A key factor affecting the durability of asphalt pavements is moisture damage. Moisture damage is generally considered to be the result of two main mechanisms; the loss of adhesion between bitumen and the aggregate and the loss of cohesion within the mixture. Conventional test methods for evaluating moisture damage include tests conducted on loose bitumen-coated aggregates and those conducted on compacted asphalt mixtures. This paper looks at results from the rolling bottle and the saturated ageing tensile stiffness (SATS) tests in an attempt to better understand the underlying processes and mechanisms of moisture damage with the help of surface energy measurements on the constituent bitumen and aggregates. Combinations of materials were assessed using both the rolling bottle and SATS tests. The surface energy properties of the binders were measured using a dynamic contact angle analyser and those of the aggregates using a dynamic vapour sorption device. From these surface energy measurements, it was possible to predict the relative performance of both the simple rolling bottle test and the more complicated SATS test. Mineralogical composition of the aggregates determined using a mineral liberation analyser was used to explain the differences in performance of the mixtures considered.