Dynamic tensile fracture test of semi flexible epoxy asphalt concrete

IF 0.5 4区 材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY International Journal of Materials & Product Technology Pub Date : 2021-08-02 DOI:10.1504/ijmpt.2021.10039890
Ye Fang, Yongbing Guan
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引用次数: 1

Abstract

In order to overcome the problems of large error and high failure rate existing in the fracture test method of asphalt concrete materials, the dynamic tensile fracture test of semi flexible epoxy asphalt concrete materials was proposed. This method uses digital image technology (DIC) to measure the displacement of asphalt concrete crack propagation process, accurately capture the fracture process of asphalt concrete material crack tip, and use tensile test to evaluate the low temperature cracking performance of semi flexible pavement material. The experimental results show that when the loading wavelength is increased to 900 μs, the error of the maximum tensile stress calculation value is reduced to 7.5%. There is obvious size effect on the tensile strength of concrete. The safety risk assessment model has higher security guarantee. At the same time, the required capital investment is lower, and the test failure rate is always lower than 20%.
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半柔性环氧沥青混凝土动态拉伸断裂试验
为了克服沥青混凝土材料断裂试验方法存在误差大、失效率高的问题,提出了半柔性环氧沥青混凝土材料的动态拉伸断裂试验方法。该方法利用数字图像技术(DIC)测量沥青混凝土裂缝扩展过程的位移,准确捕捉沥青混凝土材料裂尖的断裂过程,并利用拉伸试验评价半柔性路面材料的低温开裂性能。试验结果表明,当加载波长增加到900μs时,最大拉应力计算值的误差减小到7.5%,尺寸对混凝土的抗拉强度有明显的影响。安全风险评估模型具有较高的安全保障。同时,所需的资金投入较低,测试失败率始终低于20%。
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来源期刊
International Journal of Materials & Product Technology
International Journal of Materials & Product Technology 工程技术-材料科学:综合
CiteScore
0.80
自引率
0.00%
发文量
61
审稿时长
8 months
期刊介绍: The IJMPT is a refereed and authoritative publication which provides a forum for the exchange of information and ideas between materials academics and engineers working in university research departments and research institutes, and manufacturing, marketing and process managers, designers, technologists and research and development engineers working in industry.
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