PROBABILITY DISTRIBUTION CORESPONDING TO COMPRESSIVE STRENGTH OF CONCRETE CORE SPECIMENS IN STRUCTURES

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  • SUZUKI Sumie
    Materials Testing Group, Central Laboratory, Japan Testing Center for Construction Materials:Department of Production and Information Science, Doctor's Degree Course, Graduate School of Engineering, Utsunomiya Univ.
  • MASUDA Yoshihiro
    Dept. of Architecture and Civil Engineering, Faculty of Engineering, Utsunomiya Univ.
  • SATO Sachie
    Dept. of Architecture and Civil Engineering, Faculty of Engineering, Utsunomiya Univ.

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  • 構造体コンクリートから採取したコア供試体の圧縮強度レベルと確率分布形状
  • コウゾウタイ コンクリート カラ サイシュ シタ コアキョウシタイ ノ アッシュク キョウド レベル ト カクリツ ブンプ ケイジョウ

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Abstract

The probability distribution of compressive strength class of any kinds of concrete was definied as normal distribution in quality control even in structure concrete. It is clear that the peak of distribution is higher than the mean value of strength in high strength concrete, nevertheless the mean value is equal to the peak of distribution in ordinary strength class of concrete. In this report, it was clarified that the shape of probability distribution of compressive strength of core specimens in high strength concrete structures was not normal distribution. So, if the probabilistic property of concrete strength is assumed to follow a normal distribution in quality control, it makes the strength lower than the design strength in structure concrete.

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