Effect of Short-Term Aging on Asphalt Modified Using Microwave Activation Crumb Rubber
Effect of Short-Term Aging on Asphalt Modified Using Microwave Activation Crumb Rubber
复制标题
短期老化对微波活化橡胶粉改性沥青的影响
DOI：
10.3390/ma12071039
复制
发表时间：
2019-04-10
期刊：
影响因子：
3.4
通讯作者：
Wu, Yu
中科院分区：
文献类型：
--
作者：
Li, Bo;Zhou, Jianing;Wu, Yu
Effective approaches are required to be developed to solve the poor compatibility and thermal stability problems of crumb rubber-modified asphalt (CRMA). This study focuses on a method called microwave activation. However, seldom researches pay attention to the properties of MACRMA after aging. The objective of this study was to prepare microwave-activated CRMA (MACRMA) and investigate the performance of asphalt after aging. The samples were subjected to thin-film oven test (TFOT) at different times and temperatures. The effect of heat aging on the properties of MACRMA was evaluated by three indicator tests: viscosity, dynamic shear rheology test (DSR), and repeat creep recovery test (RCRT). The test results indicated that the MACRMA after two aging conditions had noticeably lower performance values (e.g., penetration, ductility) compared to unaged samples, and thus, the need to control temperature and time for mixing and construction was verified to be important. In addition, the G*/sin and phase angle values were largely influenced by the TFOT aging temperature and time. The MACRMA's ability to recover was improved after aging. Compared with the aging temperature, the aging time had a more significant effect on the deformation and recovery ability of MACRMA.
