Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
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Statistical Estimation of Specified Concrete Strength by Applying Non-Destructive Test Data

비파괴시험 자료를 적용한 콘크리트 기준강도의 통계적 추정

  • Paik, Inyeol (Department of Civil and Environmental Engineering, Gachon University)
  • 백인열 (가천대학교 토목환경공학과)
  • Received : 2014.10.27
  • Accepted : 2015.01.06
  • Published : 2015.02.28
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Abstract

The aim of the paper is to introduce the statistical definition of the specified compressive strength of the concrete to be used for safety evaluation of the existing structure in domestic practice and to present the practical method to obtain the specified strength by utilizing the non-destructive test data as well as the limited number of core test data. The statistical definition of the specified compressive strength of concrete in the design codes is reviewed and the consistent formulations to statistically estimate the specified strength for assessment are described. In order to prevent estimating an unrealistically small value of the specified strength due to limited number of data, it is proposed that the information from the non-destructive test data is combined to that of the minimum core test data. The the sample mean, standard deviation and total number of concrete test are obtained from combined test data. The proposed procedures are applied to an example test data composed of the artificial numerical values and the actual evaluation data collected from the bridge assessment reports. The calculation results show that the proposed statistical estimation procedures yield reasonable values of the specified strength for assessment by applying the non-destructive test data in addition to the limited number of core test data.

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References

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