FUNDAMENTAL STUDY ON INTERNAL EVALUATION OF CONCRETE BY USING AERIAL ULTRASONIC WAVE METHOD

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  • KANAMORI Soju
    FUJITA CORPORATION, Department of Building Construction（4-25-2, Sendagaya, Shibuya-ku, Tokyo 151- 8570, Japan）
  • SEKI Toshikatsu
    AICHI INSTITUTE OF TECHNOLOGY, Graduate School of Engineering（1247, Yachigusa, Yagusa-cho, Toyota-shi, Aichi 470-0392, Japan）
  • SEKO Shigeki
    AICHI INSTITUTE OF TECHNOLOGY, Department of Architecture, Faculty of Engineering（1247, Yachigusa, Yagusa-cho, Toyota-shi, Aichi 470-0392, Japan）
  • YAMADA Kazuo
    AICHI INSTITUTE OF TECHNOLOGY, Department of Architecture, Faculty of Engineering（1247, Yachigusa, Yagusa-cho, Toyota-shi, Aichi 470-0392, Japan）

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Other Title
  • 空中超音波法を適用したコンクリートの内部探査に関する基礎的研究

Abstract

<p>In this study, as a fundamental study on the applicability of the aerial ultrasonic wave method for evaluating the aged deterioration of concrete buildings, the accuracy of internal evaluation for the cracks and poor filling areas affecting the corrosion of reinforced steel bars and PC steel bars in the concrete buildings were examined. The following results were obtained in this study. By applying the aerial ultrasonic wave method proposed in this study, it was possible to evaluate the projected area of the cracks projected on the concrete surface, the filling defect area more than 4.5mm width around reinforced steel bar and the location of sheath tube. However, it was difficult to evaluate the angle of cracks, the location of reinforced steel bar and the filling defect area of grout in sheath tube regardless of the evaluating indexs.</p>

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