A method for determining the statistical characteristics of concrete homogeneity

Abstract

It is frequently necessary to quickly and accurately determine the statistical characteristics of concrete homogeneity from a few test results. This paper proposes an approximate method for determining c v together with Ray and o, for a given numerical series consisting of n partial strength values Ri, as a function of the minimum Rmi n and maximum Rmax strengths in the series.The method is based on V. V. Stoi'nikov's proposition that "The homogeneity characteristic of concrete in a structure can be considered as the generalized characteristic of the quality of organization and mechanization of the overall process of manufacture, transport, placing and curing of the concrete and control on the particular construction.* For conditions of constant industrial process, for obtaining the basic materials (governing their homogeneity), Ixeparation, transport and placing of the concrete mix, in addition to the concrete curingtechnology, the proposition is justified that the statistical characteristics of homogeneity are a function of the difference between the maximum and minimum stxength of the concrete.