Examination of moisture sensitivity of aggregate-bitumen bonding strength using loose asphalt mixture and physico-chemical surface energy property tests
Examination of moisture sensitivity of aggregate-bitumen bonding strength using loose asphalt mixture and physico-chemical surface energy property tests
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DOI：
10.1080/10298436.2013.855312
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发表时间：
2014-08-09
影响因子：
3.8
通讯作者：
Airey, Gordon
中科院分区：
文献类型：
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作者：
Liu, Yawen;Apeagyei, Alex;Airey, Gordon
在这项研究中，不同类型的集料和沥青结合料的湿敏性进行了检查，通过比较的性能之间的五个经验的松散混合料的测试方法-静态浸泡试验，滚瓶试验（RBT），沸水试验（BWT），全水浸泡试验和超声波方法-与更多的基本表面能为基础的测试数据。RBT和BWT的结果表明，石灰石骨料的性能优于花岗岩骨料，对于未改性的粘合剂，较硬的粘合剂提供更好的防潮性相比，较软的粘合剂。这两个测试是敏感的骨料类型，粘合剂类型和抗剥离剂类型。RBT和BWT的混合物的排名与基于表面能的测试基本一致，特别是对于在RBT和BWT中表现最差或最好的混合物。在水的存在下，剥离的工作的幅度被认为是集料类型依赖于这表明集料的物理化学性质可能发挥根本性的和更重要的作用，在产生的水分损害，比沥青性能。
In this study, the moisture sensitivity of different kinds of aggregates and bituminous binders is examined by comparing the performance between five empirical test methods for loose mixtures - static immersion test, rolling bottle test (RBT), boiling water test (BWT), total water immersion test and the ultrasonic method - with more fundamental surface energy-based test data. The RBT and BWT results showed that limestone aggregates perform better than granite aggregates and that, for unmodified binders, stiffer binders provide better moisture resistance compared with softer binder. Both tests were sensitive to aggregate type, binder type and anti-stripping agent type. Ranking of the mixtures by RBT and BWT was in general agreement with the surface energy-based tests, especially for mixtures that performed worst or best in RBT and BWT. The magnitude of the work of debonding in the presence of water was found to be aggregate type dependent which suggests the physico-chemical properties of aggregates may play a fundamental and more significant role in the generation of moisture damage, than bitumen properties.