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Title |
Review on the Aging Factor in the Rebound Hardness Test Method
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Authors |
김우석(Wooseok Kim) ; 신경준(Kyung-Joon Shin) |
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DOI |
https://doi.org/10.4334/JKCI.2026.38.4.433 |
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Keywords |
반발경도; 압축강도; 탄산화 rebound method; compressive strength; carbonation |
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Abstract |
The rebound hammer test is the most widely used non-destructive testing method in Korea for estimating the compressive strength of concrete. This method has the advantages of simplicity and rapid testing but is influenced by various factors such as the test procedure, environmental conditions, and structural deterioration. In aged structures, the effects of carbonation are particularly significant. While, the ‘age coefficient’ is applied to compensate for these effects; however, this coefficient is based on guidelines established in Japan in 1956 and has been criticized by many researchers as being unreasonable. This study aims to conduct an in-depth review of the current application of the rebound hammer method and related domestic regulations. To this end, the influence of carbonation on the rebound hardness is analyzed, and the approaches adopted by international standards and guidelines from Japan, the United States, Europe, China, and the ISO are compared to propose improvements for the Korean standards.
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