Based on DIC Technology, the Cracking Resistance of Asphalt Mixture Modified by Warm Mixing Powder Before and After Aging
YIN Dandan1,2,3, CHANG Chunqing1,2, WANG Lan1,2, JIAO Zixiong1,2
1 School of Civil Engineering, Inner Mongolia University of Technology, Hohhot 010051, China 2 Key Laboratory of Civil Engineering Structure and Mechanics, Inner Mongolia Autonomous Region, Inner Mongolia University of Technology, Hohhot 010051, China 3 Xingtai Construction Group Co., Ltd., Ordos 017000, China
Abstract: The strain field in the whole cracking process of semi-circular bending test (SCB) specimen under repeated load is observed based on digital image correlation technology in order to study the effect of thermal aging on the cracking characteristics of warm mix rubber powder modified asphalt mixture (WMA) and hot mix rubber powder modified asphalt mixture (HMA) under repeated load. At the same time, the cracking characteristics of WMA and HMA before and after aging are further analyzed through semi-circular three-point bending test and aggregate contact angle measurement experiment. The results show that consistent conclusions can be drawn by using meso indexes (horizontal strain Exx at cracking point, damage factor D), macro mechanical indexes (fracture energy density FE, creep strain energy density DCSE) and two adhesion indexes between asphalt and aggregate (adhesion work Was). That is, as the degree of thermal aging deepens, the damage and cracking resistance of WMA and HMA become worse, and the cracking resistance and aging resistance of WMA are better than those of HMA.
殷丹丹, 常春清, 王岚, 焦子雄. 基于DIC技术分析老化前后温拌胶粉改性沥青混合料的开裂特性[J]. 材料导报, 2021, 35(24): 24088-24094.
YIN Dandan, CHANG Chunqing, WANG Lan, JIAO Zixiong. Based on DIC Technology, the Cracking Resistance of Asphalt Mixture Modified by Warm Mixing Powder Before and After Aging. Materials Reports, 2021, 35(24): 24088-24094.
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2021, Vol. 35 
