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Title |
Development of an In-Place Concrete Density Measurement Method Based on Elastic Wave Velocity
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Authors |
이준영(Jun-Young Lee) ; 홍승주(Seung-Ju Hong) ; 홍진영(Jinyoung Hong) ; 최하진(Hajin Choi) |
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DOI |
https://doi.org/10.4334/JKCI.2026.38.1.023 |
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Keywords |
콘크리트 밀도; 비접촉 초음파 시험; 탄성파; 비선형 회귀분석; 재료 물성 평가; 비파괴 검사 in-place concrete density; non-contact ultrasonic testing; elastic wave; nonlinear regression; material property evaluation; non-destructive testing |
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Abstract |
In this work, a non-destructive method for evaluating the internal density of concrete using a non-contact ultrasonic transducer was proposed. In an experiment, ultrasonic signals were recorded while varying the angle of the transducer, from which the critical angle was calculated. The velocities of ultrasonic P-waves and S-waves were then calculated by applying Snell’s law. Based on these velocities, the internal density of concrete was estimated by using P-wave and S-wave velocity equations incorporating material coefficients and nonlinear regression analysis. The accuracy and reliability of the proposed method were verified through simulation and slab specimen experiments with varying material coefficients. Through this, the practicality of evaluating the internal density of concrete structures was evaluated.
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