Effect of Film Thickness on the Rheological Properties of Asphalts in Contact with Aggregate Surface
Effect of Film Thickness on the Rheological Properties of Asphalts in Contact with Aggregate Surface
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DOI：
10.3141/1638-04
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发表时间：
1998
影响因子：
1.7
通讯作者：
Shin-Che Huang;J. F. Branthaver;R. Robertson;Sang-Soo Kim
中科院分区：
文献类型：
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作者：
Shin-Che Huang;J. F. Branthaver;R. Robertson;Sang-Soo Kim
集料与沥青的相互作用对沥青混合料性能的影响一直是人们研究的课题。然而，使用压实混合物的研究不能分离出沥青-骨料相互作用的纯粹影响，而使用沥青和细粒混合物的研究不能确定界面处的沥青流变。在这项研究中，直接测量沥青流变在界面上使用滑动板几何与机械集料板。已观察到沥青与集料板接触时的显著差异，特别是在低剪切速率下。一种沥青表现出大量的集料表面诱导结构，而另一种沥青基本上没有。此外，还研究了膜厚对沥青粘结剂和沥青骨料混合料流变性能的影响。研究结果强烈表明，集料表面的沥青薄膜的流变特性发生了很大的变化，这与沥青成分有关，并且在这种使用环境下，与散装材料级配相似的沥青不具有与薄膜相同的流变特性。
The effect of the interaction between aggregate and asphalt on asphalt mix properties has been a subject of many studies. However, studies using compacted mixtures cannot isolate the pure effects of the asphalt-aggregate interactions, while studies using mixtures of asphalt and fines cannot determine the asphalt rheology at the interface. In this study, direct measurement of asphalt rheology at the interface is investigated using the sliding plate geometry with machined aggregate plates. Significant differences in the behavior of asphalts in contact with aggregate plates have been observed, especially at low shear rates. One asphalt shows substantial aggregate surface-induced structuring, while another asphalt shows essentially none. In addition, the film thickness effect on the rheological properties of asphalt binders and asphalt aggregate mixtures was investigated. The results strongly show that thin films of asphalt on an aggregate surface have substantially changed rheological properties that are asphalt composition–dependent, and that asphalts that are graded alike as bulk materials do not have the same rheological properties as thin films, in this service environment.