Effects of temperature and strain rate on the damaging mechanism of asphalt concrete under uniaxial compression

IF 3.4 3区工程技术 Q2 CONSTRUCTION & BUILDING TECHNOLOGY

Materials and Structures Pub Date : 2025-04-14 DOI:10.1617/s11527-025-02624-x

Zheng Si, Yulong Zhang, Lingzhi Huang, Chao Yang, Xiaoqi Du, Jian Song

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Abstract

To explore the effects of temperature and strain rate on the damaging mechanism of asphalt concrete under uniaxial compression, experimental and numerical investigations were conducted. Firstly, uniaxial compressive test of asphalt concrete at various temperatures (− 10 °C ~ 20 °C) and strain rates (10^–5/s ~ 10^–2/s) were conducted. Then, based on the viscoelastic-plastic damage constitutive model and discrete element method (DEM), the complete stress–strain curves of asphalt concrete at various temperatures and strain rates were well simulated. Finally, the damaging mechanisms of asphalt concrete under uniaxial compression were analyzed based simulated results. The results indicate that the interface between asphalt mortar and coarse aggregate is prone to damage, and there are more shear cracks compared to tensile cracks. In addition, the fragments number relates to crack evolution rate. Temperature effect on mechanical behaviors is mainly due to the gradual transformation between elasto-plasticity and viscoelasticity of asphalt concrete. The strain rate effect mainly affects crack evolution rate, meanwhile affects temperature effect to some extent.

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温度和应变率对沥青混凝土单轴压缩破坏机理的影响

为探讨温度和应变速率对沥青混凝土单轴压缩损伤机理的影响，进行了试验和数值研究。首先，对沥青混凝土进行了不同温度（−10℃~ 20℃）、应变速率（10 - 5/s ~ 10 - 2/s）下的单轴压缩试验。然后，基于粘弹塑性损伤本构模型和离散元法（DEM），模拟了沥青混凝土在不同温度和应变速率下的完整应力-应变曲线。最后，根据模拟结果分析了沥青混凝土在单轴压缩下的损伤机理。结果表明：沥青砂浆与粗集料界面易发生损伤，剪切裂缝多于拉伸裂缝；此外，破片数与裂纹演化速率有关。温度对沥青混凝土力学性能的影响主要是由于沥青混凝土的弹塑性逐渐向粘弹性转变。应变速率效应主要影响裂纹扩展速率，同时对温度效应也有一定影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Materials and Structures 工程技术-材料科学：综合

CiteScore

6.40

自引率

7.90%

发文量

222

审稿时长

5.9 months

期刊介绍： Materials and Structures, the flagship publication of the International Union of Laboratories and Experts in Construction Materials, Systems and Structures (RILEM), provides a unique international and interdisciplinary forum for new research findings on the performance of construction materials. A leader in cutting-edge research, the journal is dedicated to the publication of high quality papers examining the fundamental properties of building materials, their characterization and processing techniques, modeling, standardization of test methods, and the application of research results in building and civil engineering. Materials and Structures also publishes comprehensive reports prepared by the RILEM’s technical committees.