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Title:Large ring test for evaluation of restrained shrinkage cracking : calibration and experimental trial
Authors:ID Xu, Zhongyu (Author)
ID Hanžič, Lucija (Author)
ID Asche, Harry (Author)
ID Karlovšek, Jurij (Author)
Files:URL URL - Source URL, visit https://onlinelibrary.wiley.com/doi/epdf/10.1155/2024/6698625
 
.pdf PDF - Presentation file, download (3,00 MB)
MD5: 47C1B0B57ADEE90630EFD9D0F233CF25
 
Language:English
Typology:1.01 - Original Scientific Article
Organization:Logo ZAG - Slovenian National Building and Civil Engineering Institute
Abstract:The durability of shotcrete tunnel linings is significantly affected by restrained shrinkage cracking. Given the unique characteristics of shotcrete applied in tunnel linings, especially when dealing with accelerated shotcrete containing reinforcement fibres, it is necessary to upscale the ring test commonly used. This paper presents a comprehensive experiment using large ring tests with cast concrete to investigate the impact of upscaling ring test geometry. The two ring specimens demonstrated comparable cracking age (22 days) and strain measured in the steel ring, suggesting that consistent results can be obtained through the proposed instrumentation, calibration, and correction methods. Moreover, the estimated induced tensile stresses of the concrete rings (2.8 and 2.7 MPa) are slightly lower than the predicted tensile strength (3.3 MPa) at the age of cracking, which indicates that some driving forces contributing to restrained shrinkage cracking were not indicated in the strain gauge readings. Furthermore, the study identified multi-crack formation and additional potential causes for crack initiation, which include self-restraint due to the moisture gradient in the vertical direction, deflection of the concrete ring caused by its self-weight, and friction on the contact surface of the support. Therefore, optimising the geometry of the ring specimens and the apparatus is imperative to minimise additional driving forces and unmeasurable restraints for crack initiation, especially when employing the stress rate method to assess cracking potential.
Keywords:concrete, restrained shrinkage, tunnel lining, large ring test
Publication status:Published
Publication version:Version of Record
Publication date:05.04.2024
Publisher:Hindawi Publishing Corporation
Year of publishing:2024
Number of pages:str. 1-18
Numbering:Vol. 2024, Issue 1
PID:20.500.12556/DiRROS-19612 New window
UDC:620.1/.2
ISSN on article:1687-8094
DOI:10.1155/2024/6698625 New window
COBISS.SI-ID:201974787 New window
Copyright:© 2024 Zhongyu Xu et al.
Note:Nasl. z nasl. zaslona; Opis vira z dne 16. 7. 2024;
Publication date in DiRROS:22.07.2024
Views:468
Downloads:316
Metadata:XML DC-XML DC-RDF
:
XU, Zhongyu, HANŽIČ, Lucija, ASCHE, Harry and KARLOVŠEK, Jurij, 2024, Large ring test for evaluation of restrained shrinkage cracking : calibration and experimental trial. Advances in Civil Engineering (Online) [online]. 2024. Vol. 2024, no. 1, p. 1–18. [Accessed 7 April 2025]. DOI 10.1155/2024/6698625. Retrieved from: https://dirros.openscience.si/IzpisGradiva.php?lang=eng&id=19612
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Record is a part of a journal

Title:Advances in Civil Engineering (Online)
Shortened title:Adv. Civ. Eng. (Online)
Publisher:Hindawi Publishing Corporation
ISSN:1687-8094
COBISS.SI-ID:522082585 New window

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

Language:Slovenian
Keywords:beton, ovirano krčenje, tunelske obloge, test z velikim obročem


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