Investigation of the adhesive and cohesive properties of asphalt, mastic, and mortar in porous asphalt mixtures
Investigation of the adhesive and cohesive properties of asphalt, mastic, and mortar in porous asphalt mixtures
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DOI：
10.1016/j.conbuildmat.2021.122255
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发表时间：
2021-01-19
影响因子：
7.4
通讯作者：
Chen, Hongqing
中科院分区：
文献类型：
--
作者：
Wang, Xiaowei;Ren, Jiaxing;Chen, Hongqing
沥青、胶浆和砂浆在同一排水性沥青混合料中的粘结和粘结性能从根本上决定了排水性沥青混合料的耐久性和破坏机理。研究了一种典型的掺加三种沥青的PA混合料，并设计了相应的沥青、胶浆和砂浆。粘结剂粘结强度(BBS)试验用于评价沥青的粘附性和粘聚力(Ad/Co)，改进的BBS试验用于评价胶浆和砂浆的AD/Co。研究了沥青性质、温度和水损害对沥青、胶浆和砂浆的Ad/Co比的影响。此外，还进行了间接拉伸试验和坎塔布罗损失试验，研究了混合料的耐久性与间接拉伸强度(ITS)和粘结剂的Ad/Co之间的关系。结果表明，沥青、胶浆和砂浆的粘结强度随沥青动态粘度的增大而增大。随着温度的升高，沥青的破坏类型从粘结破坏转变为粘结破坏，而胶浆和砂浆的破坏类型则从粘结破坏转变为粘结破坏。沥青在潮湿条件下发生粘结破坏，随着水损害的增加，胶浆和砂浆的破坏类型由粘结破坏转变为粘结破坏。砂浆的Ad/Co值有可能用于预测和评价PA混合料的ITS和耐久性。最后，讨论了PA混合料在不同温度和水分损伤下的粘结破坏机理。(C)2021年爱思唯尔有限公司。保留所有权利。
The adhesive and cohesive properties of asphalt, mastic, and mortar in the same porous asphalt (PA) mixture essentially control the durability and failure mechanism of PA mixtures. A typical PA mixture with three types of asphalt was investigated, and the corresponding asphalt, mastic, and mortar were also designed. Binder bond strength (BBS) test was used to evaluate the adhesion and cohesion (Ad/Co) of the asphalt, and a modified BBS test was developed to evaluate the Ad/Co of the mastic and the mortar. The influences of asphalt properties, temperature, and moisture damage on the Ad/Co of the asphalt, mastic, and mortar were evaluated. In addition, indirect tensile tests and Cantabro loss tests were performed to investigate the relationships between the durability and indirect tensile strength (ITS) of the mixture and the Ad/Co of binder. The results indicate that the cohesive strength of asphalt, mastic, and mortar increases with the increasing dynamic viscosity of asphalt. The failure type of the asphalt changes from adhesive to cohesive failure, while the failure types of the mastic and mortar change from cohesive to adhesive failure with the increasing temperature. Adhesive failure was observed in asphalt under wet conditions, and the failure type of the mastic and mortar changed from cohesive to adhesive failure with increasing moisture damage. The Ad/Co of mortar has the potential to predict and evaluate the ITS and the durability of PA mixtures. Finally, the adhesive and cohesive failure mechanisms of PA mixture are discussed under different temperature and moisture damage. (C) 2021 Elsevier Ltd. All rights reserved.