ORIGINAL RESEARCH article
Front. Mater.
Sec. Structural Materials
Volume 12 - 2025 | doi: 10.3389/fmats.2025.1576065
This article is part of the Research TopicAdvanced Materials and Technologies for Sustainable Development of Underground ResourcesView all 45 articles
Experimental research on microstructure characteristics and mechanical performance of interfaces between concrete layers
Provisionally accepted
- 1Tsinghua University, Beijing, Beijing, China
- 2University of Science and Technology Beijing, Beijing, Beijing Municipality, China
- 3China University of Mining and Technology, Beijing, Beijing, China
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In this study, the effects of the interval time between successive layers on the microstructures and macro performances of overlay transition zones (OTZs) in conventional concrete and roller-compacted concrete (RCC) are investigated. First, the fluorescent epoxy impregnation method is used to obtain microstructure images of their OTZs. Microcrack skeletons are distinguished and extracted using the traditional digital image recognition algorithm. Thus, the effects of the interval time on OTZ microstructures can be better evaluated. Then, splitting tensile strength tests are conducted to study the effects of the interval time on the macromechanical properties and failure surfaces of the OTZs. Accordingly, the relationships between the microstructural characteristics and macromechanical properties of the OTZs are established.Finally, the differences in the microstructural characteristics of the conventional concrete and the RCC are examined. The effects of their microstructures on their macro performance and failure surfaces are compared and analyzed. Consequently, this study provides experimental and theoretical references for constructing concrete dams.
Keywords: Conventional concrete, rcc, OTZ, Microcrack, Tensile Strength, failure surface
Received: 21 Feb 2025; Accepted: 23 Apr 2025.
Copyright: © 2025 Shen, Wang, Qian, Liu and Chen. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Shouguang Wang, Tsinghua University, Beijing, 100084, Beijing, China
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