Interlayer bonding performance of WTR/APAO composite modified asphalt
Abstract
To investigate the bonding performance of waste tire rubber (WTR)/ amorphous α-olefin copolymer (APAO) composite modified asphalt as a waterproof bonding layer in asphalt pavements on cement concrete bridges, shear and pull-off tests were conducted. The shear strength and pull-off strength of SBS-modified asphalt, WTR-modified asphalt, and WTR/APAO composite modified asphalt were compared under different application rates and temperatures. The results show that WTR/APAO composite modified asphalt exhibits the best bonding performance, followed by WTR-modified asphalt, with SBS-modified asphalt performing the worst. Based on the shear and pull-off strengths at different temperatures, the optimal application rates were determined as 1.7 kg/m² for SBS-modified asphalt and 1.2 kg/m² for both WTR-modified asphalt and WTR/APAO composite modified asphalt. As the temperature increases, the shear and pull-off strengths of all three asphalts decrease significantly, indicating the strong influence of temperature on bonding performance. Among the three, WTR/APAO composite modified asphalt demonstrates superior shear and pull-off strength at elevated temperatures, highlighting its better bonding performance under high-temperature conditions.
Publication Date
5-11-2023
DOI
10.14048/j.issn.1671-2579.2023.02.031
First Page
178
Last Page
182
Submission Date
March 2025
Recommended Citation
Hongyan, JI; Kezhen, YAN; Jian, YUAN; and Xuanyu, ZHANG
(2023)
"Interlayer bonding performance of WTR/APAO composite modified asphalt,"
Journal of China & Foreign Highway: Vol. 43:
Iss.
2, Article 31.
DOI: 10.14048/j.issn.1671-2579.2023.02.031
Available at:
https://zwgl1980.csust.edu.cn/journal/vol43/iss2/31
Reference
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