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  4. A new methodology to estimate the early-age compressive strength of concrete before demolding
 
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A new methodology to estimate the early-age compressive strength of concrete before demolding

Citation Link: https://doi.org/10.15480/882.13176
Publikationstyp
Journal Article
Date Issued
2024-07
Sprache
English
Author(s)
Narantogtokh, Bayarjavkhlan  
Nishiwaki, Tomoya  
Takasugi, Fumiya  
Koyama, Ken  
Lehmann, Timo  
Jagiello, Anna  
Droin, Felix  
Ding, Yao  
TORE-DOI
10.15480/882.13176
TORE-URI
https://hdl.handle.net/11420/48545
Journal
Buildings  
Volume
14
Issue
7
Article Number
2099
Citation
Buildings 14 (7): 2099 (2024)
Publisher DOI
10.3390/buildings14072099
Scopus ID
2-s2.0-85199666542
Publisher
Multidisciplinary Digital Publishing Institute
Non-destructive testing has many advantages, such as the ability to obtain a large number of data without destroying existing structures. However, the reliability of the estimation accuracy and the limited range of applicable targets remain an issue. This study proposes a novel pin penetration test method to determine the early-age compressive strength of concrete before demolding. The timing of demolding and initial curing is determined according to the strength development of concrete. Therefore, it is important to determine the compressive strength at an early age before demolding at the actual construction site. The applicability of this strength estimation methodology at actual construction is investigated. Small test holes (12 mm in diameter) are prepared on the mold surface in real construction sites and mock-up specimens in advance. The pin is penetrated into these test holes to obtain the relationship between the compressive strength and the penetration depth. As a result, it is confirmed that the pin penetration test method is suitable for measuring the early-age compressive strength at the actual construction site. This allows the benchmark values for compressive strength, necessary to avoid early frost damage, to be directly verified on the concrete structural members at the construction site. For instance, the compressive strengths of greater than 5 MPa and 10 MPa can be confirmed by the penetration depths benchmark values of 8.0 mm and 6.7 mm or less, respectively.
DDC Class
624: Civil Engineering, Environmental Engineering
Publication version
publishedVersion
Lizenz
https://creativecommons.org/licenses/by/4.0/
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