Pavement Performance of Chemically Activated Terminal Blend Rubber Powder Modified Asphalt Mixtures

doi:10.3969/j.issn.1674-0696.2025.07.08

Abstract

Abstract: The preparation of TB rubber powder modified asphalt by chemical additives can effectively reduce preparation temperature, prevent aging and save energy. In order to explore the practical application value of chemically activated TB rubber powder modified asphalt, rock asphalt was selected as the reinforcing agent for chemically activated TB rubber powder modified asphalt and compared with SBS modified asphalt and matrix asphalt. Three kinds of asphalt mixtures with different gradations, such as SMA-13, AC-20 and AC-25, were prepared. Based on the rutting test, Hamburg rutting test, low-temperature semi-circular bending test, freeze-thaw splitting test, immersion Marshall test and four-point bending beam fatigue test, the road performance of chemically activated TB rubber powder modified asphalt was studied. The research results show that the dry addition of rock asphalt effectively overcomes the shortcomings of high temperature performance of TB rubberized asphalt powder modified asphalt, improves the water stability of the mixture, adapts to harsh hydrothermal environments, and largely retains the excellent low-temperature performance characteristics of TB rubberized asphalt powder modified asphalt. The fatigue performance of chemically activated TB rubber powder modified asphalt is superior to that of base asphalt, however, rock asphalt may somewhat impair the fatigue performance of the mixture.

Key words: road engineering; TB rubberized asphalt; chemical additives; rock asphalt; asphalt mixture; pavement performance

摘要： 通过化学添加剂制备TB胶粉改性沥青可有效降低制备温度、防止老化、节约能源，为了探究化学法TB胶粉改性沥青的实际应用价值，选择岩沥青作为化学法TB胶粉改性沥青的增强剂并与SBS改性沥青、基质沥青进行对比，制备了SMA-13、AC-20、AC-25等3种不同级配的沥青混合料。基于车辙试验、汉堡车辙试验、低温半圆弯曲试验、冻融劈裂试验、浸水马歇尔试验和四点弯曲梁疲劳试验对化学法TB胶粉改性沥青的路用性能进行了研究。研究结果表明：干法加入岩沥青能有效地弥补TB胶粉改性沥青高温性能不足，提高了混合料的水稳定性，适应严酷的水热环境，较大程度的保留了TB胶粉改性沥青低温性能优异的特点；化学法TB胶粉改性沥青疲劳性能优于基质沥青，但岩沥青会在一定程度损伤混合料疲劳性能。

关键词: 道路工程；TB胶粉改性沥青；化学添加剂；岩沥青；沥青混合料；路用性能

CLC Number:

U414

YUE Hongzhi1,2, CHEN Yingjiao3, ZHAO Lin1,2, ZHOU Haifang3, LYU Quan4. Pavement Performance of Chemically Activated Terminal Blend Rubber Powder Modified Asphalt Mixtures[J]. Journal of Chongqing Jiaotong University(Natural Science), 2025, 44(7): 59-66.

岳宏智1,2，陈应鲛3，赵林1,2，周海防3，吕泉4. 化学法TB胶粉改性沥青混合料的路用性能研究[J]. 重庆交通大学学报（自然科学版）, 2025, 44(7): 59-66.

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