Experimental research on stress-strain full curves of waste glass powder concrete under uniaxial compression

被引：0
|
作者：
Jiao C. [1 ]
Li S. [1 ]
Gan Y. [2 ]
机构：
[1] School of Civil Engineering, Guangzhou University, Guangzhou
[2] School of Civil Engineering, University of South China, Hengyang
来源：
Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) | 2020年 / 50卷 / 02期
关键词：
Ductility coefficient; Peak stress; Stress-strain full curve; Uniaxial compression; Waste glass powder concrete;
D O I：
10.3969/j.issn.1001-0505.2020.02.003
中图分类号：
学科分类号：
摘要：
To study the whole process mechanical characteristics of waste glass powder concrete under uniaxial compression, the stress-strain full curve tests of prismatic specimens with six substitution rates of 0%, 10%, 15%, 20%, 25%, 30% and two strength grades of C30 and C50 were carried out under uniaxial compression. The trend of the stress-strain curve during the whole process was analyzed and the performance indexes such as the proportional limit, the peak stress and the ductility coefficient were studied. The stress-strain full curve of waste glass powder concrete was studied by using the segmental constitutive relation.The results show that the stress-strain full curve shape of waste glass powder concrete is similar to that of ordinary concrete. With the increase of the replacement rate, the slope of the ascending section decreases, while the descending section becomes more gradual. The standard deviation of the mean curve at various substitution rates first increases and then decreases until it remains unchanged. Compared with ordinary concrete, the proportion limit of waste glass powder concrete is relatively smaller while the peak strain is bigger. The good ductility is due to the strong plastic deformation in the ascending section. The calculated curve of the segmented constitutive equation agrees well with the test curve. For the C30 strength grade, the ascending segment parameter is 2.146, and the descending section parameter is 0.8. For the C50 strength grade, the ascending segment parameter is 1.987 and the descending section parameter is 1.462. © 2020, Editorial Department of Journal of Southeast University. All right reserved.
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页码：222 / 230
页数：8
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