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Computers and Concrete
  Volume 20, Number 1, July 2017, pages 049-55

Concrete compressive strength identification by impact-echo method
Chi-Che Hung, Wei-Ting Lin, An Cheng and Kuang-Chih Pai

    A clear correlation exists between the compressive strength and elastic modulus of concrete. Unfortunately, determining the static elastic modulus requires destructive methods and determining the dynamic elastic modulus is greatly complicated by the shape and size of the specimens. This paper reports on a novel approach to the prediction of compressive strength in concrete cylinders using numerical calculations in conjunction with the impact-echo method. This non-destructive technique involves obtaining the speeds of P-waves and S-waves using correction factors through numerical calculation based on frequencies measured using the impact-echo method. This approach makes it possible to calculate the dynamic elastic modulus with relative ease, thereby enabling the prediction of compressive strength. Experiment results demonstrate the speed, convenience, and efficacy of the proposed method.
Key Words
    compressive strength prediction; dynamic elastic modulus; P-wave speed; S-wave speed
Chi-Che Hung and Kuang-Chih Pai: Institute of Nuclear Energy Research, Atomic Energy Council, 1000 Wenhua Rd. Jiaan Village, Longtan District, Taoyuan City 32546, Taiwan
Wei-Ting Lin and An Cheng: Department of Civil Engineering, National ILan University, No.1, Sec. 1, Shennong Rd., Yilan City, Yilan County 26047, Taiwan

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