Durability of asphalt mixtures: Effect of aggregate type and adhesion promoters
Durability of asphalt mixtures: Effect of aggregate type and adhesion promoters
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DOI：
10.1016/j.ijadhadh.2014.05.009
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发表时间：
2014-10-01
影响因子：
3.4
通讯作者：
Taylor, Ambrose C.
中科院分区：
文献类型：
--
作者：
Cui, Shuang;Blackman, Bamber R. K.;Taylor, Ambrose C.
沥青路面对进水很敏感，进水会降低沥青的粘结性，促进破坏。水对一系列沥青系统的影响已经通过剥离试验进行了量化。从集料固定臂上剥离铝基沥青粘结剂，测定其断裂能。在干燥条件下，破坏主要是沥青内部的黏结，但浸水后主要成为沥青与集料之间的界面。评价了水对沥青与三种骨料（石灰石、大理石和花岗岩）粘结性的影响。在潮湿条件下，酸性骨料（花岗岩）比碱性骨料（石灰石和大理石）的附着力损失更大。聚集体的孔隙度，虽然被证明是重要的，但不如它们的化学成分重要。通过在沥青中掺入硅烷、胺或橡胶聚合物，可以改善沥青在潮湿条件下的界面附着力。(C) 2014年作者。Elsevier Ltd.出版。这是一篇基于CC BY许可（http://creativecommons.org/licenses/by/3.0/）的开放获取文章。
Asphalt road-pavements are sensitive to water ingress, which degrades the bitumen to aggregate adhesion, promoting failure. The effects of water on a range of asphalt systems have been quantified using peel tests. The bitumen binder on an aluminium backing was peeled from the aggregate fixed arm and the fracture energy was determined. In dry conditions, failure was cohesive within the bitumen, but became mainly interfacial between the bitumen and aggregate after immersion in water. The effect of water on the adhesion of bitumen to three aggregates (limestone, marble and granite) was evaluated. Acidic aggregates (granite) showed a greater loss of adhesion than basic aggregates (limestone and marble) under wet conditions. The porosity of the aggregates, although shown to be significant, was less important than their chemical composition. The interfacial adhesion in wet conditions can be improved by mixing a silane, amine or rubbery polymer into the bitumen. (C) 2014 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/3.0/).