The Use of Surface Waves to Estimate In-Place Strength of Concrete

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概要

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• Non-destructive evaluation (NDE) techniques are needed to evaluate in-place strength of concrete in structures. Often mechanical wave propagation parameters are used to establish a correlation with strength. P-wave velocity measurements are most common for this purpose, but its application can be problematic. Here the utility of surface waves is investigated. Surface wave velocity and transmission (attenuation) properties are considered, where a self-compensating approach overcomes experimental difficulties usually experienced in transmission measurements. In this paper, the testing configuration is described and the concept of the self-compensating approach introduced. Then a test series is described: surface wave velocity and wave transmission and P-wave through thickness velocity data are collected from concrete slabs of different strengths. Relations between concrete strength, wave velocity and surface wave transmission are established. Surface wave velocity and normalized surface wave velocity data correlate well with in-place strength. Transmission data also are sensitive to concrete strength but data variation must be improved.

著者

• Gallo Gonzalo

  Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, USA.

• Popovics John

  Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, USA.

関連論文

• The Use of Surface Waves to Estimate In-Place Strength of Concrete

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