Wu Chunli, Tan Xiaoshu, Li Liding, Liang Chunyu, Zhao Yongchao, Li Hanjun, Wang Fuen, Zhang Long
College of Transportation, Jilin University, Changchun 130025, China.
Jilin China Railway Expressway Co., Ltd., Changchun 130052, China.
Polymers (Basel). 2023 Aug 3;15(15):3289. doi: 10.3390/polym15153289.
With the increase in highway traffic volume, many waste tires are being produced, which puts serious pressure on the global ecological environment. Processing waste tires into powder and adding them to asphalt is an important and effective way to solve this noticeable environmental challenge. In this paper, to produce ground tire rubber (GTR) and styrene-butadiene-styrene (SBS) compound-modified asphalt, GTR was put into SBS-modified asphalt (GTRSA). Subsequently, some ordinary property tests, frequency sweep tests, and multiple stress creep recovery tests were conducted to investigate the conventional properties and rheological properties of GTRSA. Moreover, the 2S2P1D (two springs, two parabolic elements, and one dashpot) model was adopted to analyze the consequences of adding GTR content on the rheological properties of GTRSA. Finally, the Pearson correlation coefficient was employed to reveal the connection between the conventional properties and the rheological properties. The results show that GTR has a great impact on improving the rutting resistance, thermo-sensitive performance, shear resistance capability, stress sensitivity, and creep recovery performance of GTRSA. Adding 20% GTR can improve the creep recovery rate to 80.8%. The 5 °C ductility index suggests that GTR makes a difference to the low-temperature properties. The rheological properties and conventional properties had a strong linear link.
随着公路交通流量的增加，产生了大量废旧轮胎，这给全球生态环境带来了巨大压力。将废旧轮胎加工成粉末并添加到沥青中是解决这一显著环境挑战的重要且有效途径。本文中，为制备胶粉（GTR）与苯乙烯-丁二烯-苯乙烯共聚物（SBS）复合改性沥青，将GTR加入到SBS改性沥青中（GTRSA）。随后，进行了一些常规性能试验、频率扫描试验和多重应力蠕变恢复试验，以研究GTRSA的常规性能和流变性能。此外，采用2S2P1D（两个弹簧、两个抛物线元件和一个阻尼器）模型分析添加GTR含量对GTRSA流变性能的影响。最后，利用皮尔逊相关系数揭示常规性能与流变性能之间的联系。结果表明，GTR对提高GTRSA的抗车辙性能、热敏感性能、抗剪切能力、应力敏感性和蠕变恢复性能有很大影响。添加20%的GTR可使蠕变恢复率提高到80.8%。5℃延度指数表明GTR对低温性能有影响。流变性能与常规性能之间存在很强的线性关系。
