In-place compressive strength of concrete: statistical methods to evaluate experimental data

Abstract

A B S T R A C T R I~ S U M I~This paper describes a number of statistical methods to estimate, through an analysis of in-place test results, the in-place compressive strength of concrete expressed as strength of standard specimens. The evaluation of the probable existence of a linear correlation as a function of sample size is discussed. The regression laws and the degree of reliability of the estimates obtained is also discussed. A criterion is proposed for the choice of the number of points to be used in the regression. Finally a method is proposed, knowing the number m of replicated in-place tests, to estimate the equivalent number n of replicated tests performed on standard specimens. Cet article pr&ente diverses m~thodes statistiques qui permettent, par le biais de l'analyse des r&ultats d'essais 'in