Based on DIC Technology, the Cracking Resistance of Asphalt Mixture Modified by Warm Mixing Powder Before and After Aging

被引：0
作者：
Yin D. [1 ,2 ,3 ]
Chang C. [1 ,2 ]
Wang L. [1 ,2 ]
Jiao Z. [1 ,2 ]
机构：
[1] School of Civil Engineering, Inner Mongolia University of Technology, Hohhot
[2] Key Laboratory of Civil Engineering Structure and Mechanics, Inner Mongolia Autonomous Region, Inner Mongolia University of Technology, Hohhot
[3] Xingtai Construction Group Co., L td., Ordos
来源：
Cailiao Daobao/Materials Reports | 2021年 / 35卷 / 24期
基金：
中国国家自然科学基金;
关键词：
Cracking characteristics; DIC technology; The adhesion work; Thermal aging; Warm mixed rubber powder modified asphalt mixture;
D O I：
10.11896/cldb.20090308
中图分类号：
学科分类号：
摘要：
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. © 2021, Materials Review Magazine. All right reserved.
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页码：24088 / 24094
页数：6
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