Evaluation Index of Low-temperature Asphalt Mixture Performance Based on Semi-circular Bending Test

被引：0

作者：

Feng D.-C. ^{[1
]}

Cui S.-T. ^{[1
]}

Yi J.-Y. ^{[1
]}

Chen Z.-G. ^{[2
]}

Qin W.-J. ^{[2
]}

机构：

[1] School of Transportation Science and Engineering, Harbin Institute of Technology, Harbin, 150090, Heilongjiang

[2] Jilin Province Transportation Science Research Institute, Changchun, 130021, Jilin

来源：

Zhongguo Gonglu Xuebao/China Journal of Highway and Transport | 2020年 / 33卷 / 07期

基金：

中国国家自然科学基金;

关键词：

Asphalt mixture; Bending beam rheometer test; Fracture energy; Low-temperature performance; Road engineering; Semicircular bending test;

D O I：

10.19721/j.cnki.1001-7372.2020.07.005

中图分类号：

学科分类号：

摘要：

The relationship between the low-temperature asphalt mixture performance evaluation index and pavement cracking is highly valued as it is an important basis for evaluating low-temperature asphalt mixture performance. In this study, the semi-circular bending (SCB) test was introduced for core samples with different cracking distances in the field along with the low-temperature asphalt cracking test and the bending beam rheometer (BBR) asphalt extraction test. Consequently, relationships were established between asphalt pavement cracking distance and fracture energy, fracture toughness, stiffness modulus, and other asphalt mixture indicators. The following conclusions can be drawn from the performed SCB and BBR tests: the improved SCB test can effectively reflect the actual low-temperature cracking of the asphalt pavement in Jilin Province; the criterion of low-temperature cracking of the asphalt pavement in the cold region is proposed through the comparative analysis of fracture energy, fracture toughness, and other indicators; furthermore, it is more reasonable to use the fracture energy of the SCB test as an evaluation index for low-temperature mixture performance. The research results enrich the low-temperature asphalt mixture performance evaluation method and provide technical support for improving the low-temperature cracking resistance design of asphalt pavements. © 2020, Editorial Department of China Journal of Highway and Transport. All right reserved.

引用

页码：50 / 57

页数：7

共 26 条

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