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

doi:10.11896/cldb.20090308

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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 E_xx 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 W_as). 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.

Key words： warm mixed rubber powder modified asphalt mixture DIC technology thermal aging cracking characteristics the adhesion work

Published: 25 December 2021 Online: 2021-12-27

CLC number:

U414

Fund:This work was financially supported by the National Natural Science Foundation of China (11962024), Inner Mongolia Key Science and Technology Program (2019GG031).

About author: Dandan Yingraduated from Inner Mongolia University of technology in June 2018 with a bachelor's degree in engineering. Since September 2018, she have been studying for a master's degree in Inner Mongolia University of Technology, mainly engaged in road enginee-ring materials research.

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	YIN Dandan
	CHANG Chunqing
	WANG Lan
	JIAO Zixiong

Cite this article:

YIN Dandan,CHANG Chunqing,WANG Lan, et al. Based on DIC Technology, the Cracking Resistance of Asphalt Mixture Modified by Warm Mixing Powder Before and After Aging[J]. Materials Reports, 2021, 35(24): 24088-24094.

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http://www.mater-rep.com/EN/10.11896/cldb.20090308 OR http://www.mater-rep.com/EN/Y2021/V35/I24/24088

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