沥青断裂性能理论模型的建立与试验验证

doi:10.3969/j.issn.1674-0696.2023.01.07

重庆交通大学学报（自然科学版） ›› 2023, Vol. 42 ›› Issue (1): 45-53.DOI: 10.3969/j.issn.1674-0696.2023.01.07

沥青断裂性能理论模型的建立与试验验证

孔令云1，张艺昕1，曾玉梅2，黄麟钬3

(1. 重庆交通大学交通土建工程材料国家地方联合工程试验室，重庆 400074； 2. 四川省交通勘察设计研究院有限公司，四川成都 610017；3. 中国电建集团中南勘测设计研究院有限公司，湖南长沙 410007)

收稿日期:2021-09-18 修回日期:2022-04-12 出版日期:2023-02-28 发布日期:2023-03-14
作者简介:孔令云（1976—），女，江苏南通人，教授，主要从事沥青路面方面的研究。E-mail：43112443@qq.com
基金资助:
国家自然科学基金项目（51708071）

Establishment and Experimental Verification of Theoretical Model of Asphalt Fracture Performance

KONG Lingyun1, ZHANG Yixin1, ZENG Yumei2, HUANG Linhuo3

(1. National & Local Joint Engineering Laboratory of Traffic Civil Engineering Materials, Chongqing Jiaotong University, Chongqing 400074, China; 2. Sichuan Traffic Survey and Design Research Institute Co., Ltd., Chengdu 610017, Sichuan, China; 3. China Power Construction Group Zhongnan Survey Design and Research Institute Co., Ltd., Changsha 410007, Hunan, China)

Received:2021-09-18 Revised:2022-04-12 Online:2023-02-28 Published:2023-03-14

摘要/Abstract

摘要： 为了评价沥青的断裂性能，根据弹性力学理论的相关知识建立沥青断裂性能的几何模型，将其分解为两个新构型的叠加，运用复变函数解法推导出沥青临界开裂状态的理论关系式，对其进行修正，得到含有中心穿透裂纹和不含宏观裂纹的沥青断裂性能的理论模型。以SK-70# 基质沥青为原材料，分别进行单向拉伸试验、弯曲蠕变试验、表面能测试和断裂性能试验，量化模型参数，将试验数据进行拟合，根据拟合结果讨论沥青表面能与断裂性能的相关性，验证模型的合理性。研究结果表明：推导出的沥青断裂性能理论模型合理可靠，可引入板宽系数对模型进行修正；对于带中心穿透裂纹的沥青，其表面能可定性表征断裂性能，且表面能越大，断裂性能越好；对于无宏观裂纹的沥青，劲度模量和表面能共同决定其断裂性能。

关键词: 道路工程, 基质沥青, 断裂性能, 表面能, 理论模型, 试验验证

Abstract: In order to evaluate the fracture performance of asphalt, the geometric model of asphalt fracture performance was established according to the relevant knowledge of elastic mechanics theory, which was decomposed into the superposition of two new configurations. The theoretical relationship of asphalt critical cracking state was derived by using the complex function method, and the theoretical model of asphalt fracture performance with central penetrating crack and without macroscopic crack was obtained by modifying it. SK-70# base asphalt was taken as raw material, and uniaxial tensile test, bending creep test, surface energy test and fracture performance test were carried out respectively. The model parameters were quantified, and the test data were fitted. According to the fitting results, the correlation between asphalt surface energy and fracture performance was discussed to verify the rationality of the model. The research results show that the theoretical model of asphalt fracture performance is reasonable and reliable, which can be modified by introducing plate width coefficient. For asphalt with central penetrating crack, the surface energy can qualitatively characterize the fracture performance, and the larger the surface energy is, the better the fracture performance is. For asphalt without macroscopic crack, the stiffness modulus and surface energy jointly determine its fracture performance.

Key words: highway engineering, base asphalt, fracture performance, surface energy, theoretical model, experimental verification

中图分类号:

U414

孔令云, 张艺昕, 曾玉梅, 黄麟钬. 沥青断裂性能理论模型的建立与试验验证[J]. 重庆交通大学学报（自然科学版）, 2023, 42(1): 45-53.

KONG Lingyun, ZHANG Yixin, ZENG Yumei, HUANG Linhuo. Establishment and Experimental Verification of Theoretical Model of Asphalt Fracture Performance[J]. Journal of Chongqing Jiaotong University(Natural Science), 2023, 42(1): 45-53.

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沥青断裂性能理论模型的建立与试验验证

Establishment and Experimental Verification of Theoretical Model of Asphalt Fracture Performance

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