한국건설순환자원학회논문집 (Journal of the Korean Recycled Construction Resources Institute)

한국건설순환자원학회 (Korean Recycled Construction Resources Institute)
권호 표지
DOI QR코드

DOI QR Code

터널 라이닝 콘크리트의 초음파 속도를 이용한 강도 등급 제안

Suggestion for Concrete Strength Grade Using Ultrasonic Velocity for Tunnel Lining Concrete

  • 투고 : 2015.12.07
  • 심사 : 2015.12.23
  • 발행 : 2015.12.30
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

본 연구에서는 무근 콘크리트 터널 라이닝의 품질 평가를 위해 초음파법을 사용하여 현장실험을 실시하였으며, 라이닝 콘크리트의 품질을 평가하였다. 초음파 탐사기의 센서 중심간격과 센서의 순간격을 기준으로 각각의 전달속도를 평가한 후 평균값에 대한 수렴정도를 예측하여 평균값을 초음파 전달속도로 구하면 직접법에서 얻어지는 결과만큼 신뢰성 있게 얻어질 수 있음을 보였다. 초음파속도에 의해 콘크리트 강도를 정량적으로 평가하는 방안은 신뢰성이 부족하며 초음파 전달속도에 따라 등급별로 콘크리트를 평가하는 방안이 보다 합리적인 평가 방안임을 나타내었다.

This study implicates a quality evaluation technique for lining concrete using the ultra-sonic technique and proposed a classification for quality evaluation. From the comparison of test results, an improved result comparable to the results by destructive test can be obtained by using averaged transmission velocity of velocities obtained at pure space and central space between two sensors of ultrasonic tester. It is also shown that strength evaluation by ultra-sonic method is not reliable and an evaluation according to the transmission velocities can be improved method for the strength evaluation of concrete.

키워드

참고문헌

  1. Akashi, T., Amasaki, S. (1985). State-of-the-art on nondestructive testing of concrete, Concrete Journal, 23(12), 11-20. https://doi.org/10.3151/coj1975.23.12_11
  2. ASTM C 597-83. (1990). Standard Test Method for Pulse Velocity through Concrete, American Society for Testing and Materials, 1-24.
  3. Bahn, H.Y. (1987). A Study on Influence of Compressive Strength of Concrete by Ultrasonic Testing, Ph.D Thesis, Hanyang University, Korea, 25-48 [in Korean].
  4. BS 1881 : Part 203 (1986). Recommendations for Measurement of Velocity of Ultrasonic Pulses in Concrete, British Standards Institution, 1-42.
  5. Bungey, J.H. (1994). The Testing of Concrete in Structure, 2nd Ed., Chapman&Hall, London.
  6. Chung, H.W. (1978). Effects of embedded steel bars upon ultrasonic testing of concrete, Magazine of Concrete Research, 30(102), 19-25. https://doi.org/10.1680/macr.1978.30.102.19
  7. Elvery, R.H. (1971). Non-destructive testing of concrete and its relationship to specifications, Journal of the Concrete Society, 5(4), 28-59
  8. Facaoaru, I. (1970). Non-destructive Testing of Concrete in Romania, Institution of Civil Engineers and the British National Committee for Non-destructive Testing, 39-49.
  9. Johnes, R. (1970). A Review of the Non-destructive Testing of Concrete, Institution of Civil Engineers and the British National Committee for Non-destructive Testing, 1-7.
  10. Kaplan, M.F. (1959). Flexural and compressive strength of concrete as affected by the properties of coarse aggregates, Journal of ACI, 55(5), 1193-1208.
  11. Kim, D.S., Lee, K.M. (1998). Nondestructive testing of concrete structures using stress wave techniques, Journal of the Korea Concrete Institute, 10(2), 40-49 [in Korean].
  12. Oh, C.H. (1971). A study of the non-destructive testing of high strength concrete by ultrasonic methods, Journal of Architectural Institute of Korea, 15(4), 5-7 [in Korean].
  13. RILEM. (1972). Testing Concrete by the Ultrasonic Pulse Method, 1-52.
  14. Whitehurst, E.A. (1951). Sonicscope tests concrete structures, Journal of ACI, 47(2), 433-444.