モルタル・コンクリート強度の統計的性質 : 均一性係数βと変動係数について

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タイトル別名
  • STATISTICAL PROPERTIES OF MORTAR AND CONCRETE STRENGTHS : On Coefficient of Uniformity and Coefficient of Variation of Bending and Compressive Strengths of Mortars and Concrete
  • モルタル コンクリート キョウド ノ トウケイテキ セイシツ キンイツセイ ケ

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説明

In the previous paper, two theoretical probability functions for bending and compressive strengths of mortar or concrete have been derived by considering fracture processes of those. Therefore, in order to make it clear that the value of the parameter β named "coefficient of uniformity" which is common to the two probability functions changes or does not with the properties of mortar or concrete, and also in order to make it sure that the equatons for the theoretical relationships between β and coefficient of variation are experimentaly correct, or not, the measurments about statistical distributions of bending and compressive strengths have been performed. The following results were obtained, (1) The values of β, V_b and V_c were nearly independent from the following four factors in mortar or concrete, watercement ratio, volume of gravels, size of gravels and curing ages. (2) The theoretical expressions of V_b, V_c as the functions of β were verified experimentaly. (3) The mean value of β was 23.55, that of V_b was 4.99%, and that of V_c was 3.29%.

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