Comparison of Weibull and normal distributions for concrete compressive strengths

Authors:
  • PTP J Tumidajski
    P J Tumidajski
  • LFL Fiore
    L Fiore
  • TKT Khodabocus
    T Khodabocus
  • MLM Lachemi
    M Lachemi
  • RPR Pari
    R Pari
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Abstract
For concrete produced in a commercial ready mix operation, the compressive strengths were fitted to Weibull and normal distributions. It was found that the Weibull distribution successfully describes concrete compressive strength failure data. This information is useful in the theoretical description of concrete failure. Furthermore, based on chi-squared, Anderson–Darling and Kolmogorov-Smirnov goodness-of-fit tests, the difference between the Weibull and normal distribution is not large enough to make a clear distinction regarding which distribution definitively fits the experimental data better. Key words: compressive strength, normal distribution, Weibull distribution, goodness-of-fit.