Analysis of Adhesion of Warm Mix Rubber Powder Modified Asphalt Aggregates and Water Stability of the System
WANG Lan1,2, LUO Xuedong1,2, ZHANG Qi1,3, ZHOU Xiaodong1,4, LI Chao1,2
1 Key Laboratory of Civil Engineering Structure and Mechanics of Inner Mongolia Autonomous Region, Inner Mongolia University of Technology, Hohhot 010051, China 2 School of Civil Engineering, Inner Mongolia University of Technology, Hohhot 010051, China 3 Entrepreneurship College of Inner Mongolia University, Hohhot 010070, China 4 Inner Mongolia Transportation Design and Research Institute Co., Ltd., Hohhot 010010, China
Abstract: Through the contact angle measurement and atomic force microscope (AFM) test, modified asphalt-aggregate adhesion changes of the pre-aging and post-aging rubber powder (CR), EM type warm mixed rubber powder (CR-EM) and SDYK type warm mixed rubber powder (CR-SDYK), are analyzed from the macro and micro perspectives, and at the same time, the peeling work model is used to explore the water stability of the system, and the reliability of the results is verified by improving the water boiling method. The results show that the adhesion and water stability of the asphalt-aggregate system showed the same order, CR-SDYK>CR-EM>CR, and the adhesion between limestone and asphalt is better; it is found that the microscopic surface energy and adhesion work of the three asphalts before and after aging are strongly correlated with the macroscopic surface energy and adhesion work, respectively, indicating that the microscopic properties of the materials affect their macroscopic properties and AFM-QNM test method is useful for evaluating adhesion of asphalt aggregates with certain accuracy and stability; the three indicators for evaluating the water stability of the asphalt-aggregate system are compared through the analytic hierarchy process (AHP), and it is found that the index ER2 has the maximum weight of 0.377 9. It is recommended to use the index ER2 to characterize its water damage resistance, and use the improved boiling method to verify the reliability of the AHP method.
王岚, 罗学东, 张琪, 周晓东, 李超. 温拌胶粉改性沥青-集料粘附性及其体系水稳定性分析[J]. 材料导报, 2022, 36(8): 21010186-4.
WANG Lan, LUO Xuedong, ZHANG Qi, ZHOU Xiaodong, LI Chao. Analysis of Adhesion of Warm Mix Rubber Powder Modified Asphalt Aggregates and Water Stability of the System. Materials Reports, 2022, 36(8): 21010186-4.
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2022, Vol. 36 
