Determination of Elastic Modulus of Concrete at Ultra-early Age by Indentation Technique

被引：0

作者：

Wang D. ^{[1
,2
]}

Zhao Q. ^{[2
]}

Dong B. ^{[1
]}

Yang Z. ^{[1
]}

Yuan L. ^{[3
]}

机构：

[1] School of Civil Engineering and Architecture, Northeast Petroleum University, Daqing

[2] Hebei Province Engineering Research Center for Harmless Synergistic Treatment and Recycling of Municipal Solid Waste, Yanshan University, Qinhuangdao

[3] Shenzhen Guoyi Park Construction Co., Ltd., Research and Development Center, Shenzhen

来源：

Jianzhu Cailiao Xuebao/Journal of Building Materials | 2023年 / 26卷 / 11期

关键词：

concrete; elastic modulus; indentation technique; indenter; ultra-early age;

D O I：

10.3969/j.issn.1007-9629.2023.11.012

中图分类号：

学科分类号：

摘要：

Based on the principle of the indentation method, a test method for the ultra-early elastic modulus of concrete was proposed. The size of the specimen was designed by numerical analysis method, and the spherical conical indenter with a cone angle of 30° was selected as the test indenter for the ultra-early elastic modulus of concrete, the optimal indentation depth was 5 mm. Comparing with the ultrasonic method, the method was verified by changing the water-binder ratio of concrete and the amount of fly ash. The initial setting time is taken as the zero point and the earliest elastic modulus that can be measured by the traditional stress-strain method as the end point, the two-point line is used to predict the super-early elastic modulus of concrete. To compare with the experimentalresults of the indentation method, the errors are all within 30%. © 2023 Tongji University. All rights reserved.

引用

页码：1229 / 1236

页数：7

共 29 条

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