Abstract
In order to improve the crack resistance of recycled asphalt mixture, a new styrenic block copolymer (SBS)/rubber composite modified asphalt with excellent crack resistance was proposed for the regeneration of reclaimed asphalt pavement (RAP). Based on the creep of low temperature bending beam, confined temperature stress, and four-point bending fatigue test, the low temperature cracking resistance and fatigue cracking performance of composite modified asphalt and SBS-modified asphalt were studied. The results show that the addition of rubber can improve the low temperature and medium temperature crack resistance of recycled asphalt concrete, which may be related to the propagation of micro-cracks formed in the initial cracking of the mixture into the polymer network to absorb the fracture energy and inhibit the further development of micro-cracks. Further analysis of the fracture temperature shows that the composite modified asphalt mixture can extend the service temperature range of the pavement by about 6 °C than the ordinary SBS-modified asphalt mixture, which is conducive to the promotion and application of recycled asphalt mixture in the cold area of northwest China.
Publication Date
3-17-2023
DOI
10.14048/j.issn.1671-2579.2023.01.039
First Page
221
Last Page
226
Submission Date
March 2025
Recommended Citation
Xiaobin, LI
(2023)
"Evaluation of anti‐cracking performance of recycled concrete with recycled rubber/SBS composite modified asphalt,"
Journal of China & Foreign Highway: Vol. 43:
Iss.
1, Article 39.
DOI: 10.14048/j.issn.1671-2579.2023.01.039
Available at:
https://zwgl1980.csust.edu.cn/journal/vol43/iss1/39
Included in
Construction Engineering and Management Commons, Other Civil and Environmental Engineering Commons, Statistical Methodology Commons, Structural Materials Commons, Transportation Engineering Commons