APPLICATION OF SURFACE WAVE TRANSMISSION MEASUREMENTS FOR CRACK DEPTH DETERMINATION IN CONCRETE
It has been established in earlier studies that stress wave attenuation measurements performed on concrete are very sensitive to the presence of damage located along the wave path. In this study, a modified form of this concept is introduced in a self-compensating measurement scheme. Surface wave transmission is obtained, across a range of frequencies, between two sensing points on the surface of a concrete specimen. The obtained signal transmission values are independent of the type of wave transmitter and receiver used. An experimental test series on a range of concrete slabs containing notches and controlled cracks of varying depths is described. The cracks are generated by subjecting the slabs to flexure using a closed-loop loading procedure. The actual depth of each generated crack is determined with the laser-based phase measurement interferometry technique. Self-compensating wave transmission measurements are performed across the discontinuities, (notches, open cracks, and closed cracks) and are shown to be repeatable and sensitive to the presence of notches and even tightly closed cracks. A relationship between the wave transmission and the crack depth normalized with respect to propagating wavelength is noted. This relationship appears to be largely unaffected by the type of concrete and the nature of the discontinuity. The results demonstrate that self-compensating wave transmission measurements show excellent potential for sensitive detection and sizing of surface-breaking cracks in concrete structures.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/oclc/13846872
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Supplemental Notes:
- This paper was prepared from a study conducted in the Center of Excellence for Airport Pavement Research. Funding for the Center of Excellence is provided in part by the Federal Aviation Administration under Research Grant Number 95-C-001.
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Corporate Authors:
American Concrete Institute (ACI)
38800 Country Club Drive
Farmington Hills, MI United States 48331 -
Authors:
- Popovics, J S
- Song, W-J
- Ghandshari, M
- Subramaniam, Kolluru V
- Achenbach, J D
- Shah, S P
- Publication Date: 2000-3
Language
- English
Media Info
- Features: Figures; References; Tables;
- Pagination: p. 127-135
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Serial:
- ACI Materials Journal
- Volume: 97
- Issue Number: 2
- Publisher: American Concrete Institute (ACI)
- ISSN: 0889-325X
- Serial URL: https://www.concrete.org/publications/acimaterialsjournal.aspx
Subject/Index Terms
- TRT Terms: Concrete; Concrete pavements; Concrete structures; Cracking; Cracking of concrete pavements; Depth; Experiments; Flexure; Interferometry; Lasers; Nondestructive tests; Signals; Slabs; Wave motion; Wavelength
- Subject Areas: Aviation; Bridges and other structures; Design; Highways; Materials; Pavements; Terminals and Facilities; I22: Design of Pavements, Railways and Guideways; I24: Design of Bridges and Retaining Walls; I32: Concrete;
Filing Info
- Accession Number: 00792302
- Record Type: Publication
- Contract Numbers: 95-C-001
- Files: TRIS
- Created Date: May 9 2000 12:00AM