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http://dx.doi.org/10.5345/JKIBC.2022.22.6.631

Comparison of Void Content between Cyldrical Concrete Specimen and Concrete Core Specimen Using ASTM C 642 Test Procedure  

Son, Joeng Jin (Architectural and Fire Protection Engineering, Pukyong National University)
Kim, Ji-Hyun (Multidisciplinary Infra-technoplogy Research Laboratory, Pukyong National University)
Chung, Chul-Woo (Architectural and Fire Protection Engineering, Pukyong National University)
Publication Information
Journal of the Korea Institute of Building Construction / v.22, no.6, 2022 , pp. 631-640 More about this Journal
Abstract
Recently, construction accidents have occurred due to illegal water addition and insufficient quality control at domestic construction sites. In this study, the void content test method proposed in ASTM C 642 was used to provide a reference guideline for evaluation on the quality control status of cast-in-place structural concrete. For this purpose, simulated structural concrete for coring purpose was prepared in addition to the concrete cylindrical specimens with the same formulation, and the changes in compressive strength, elastic modulus, and void content related to coring were evaluated. According to experimental results, the compressive strength and modulus of elasticity were reduced by coring, which was associated with the generation of microcracks during coring. With respect to void content, the difference in void content between the cylindrical specimen and the cored specimen was up to 1.69%. If this value is used as a correction factor, it is possible to estimate the real void content of the cast-in-place structural concrete. By comparing this with the void content obtained from cylindrical concrete specimens, it is possible to evaluate the quality control status and amount of illegal water addition on the structural concrete.
Keywords
quality control; illegal water addition; compressive strength; elastic modulus; void content; coring;
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Times Cited By KSCI : 1  (Citation Analysis)
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