AN EQUATION FOR MIX PROPORTIONING STRENGTH OF CONCRETE USED FOR CFT WITH CONSIDERATION OF THE INFLUENCE OF DIAPHRAGMS ON THE COMPRESSIVE STRENGTH DISTRIBUTION(Materials and Construction)

Abstract

In the case of concrete used for CFT columns, the variation in the compressive strength is considered to become large near the diaphragms. However, the mechanism that results in the large variation in the compressive strength of the concrete with near the diaphragm has remained unclarified. In this study, the distribution of the compressive strength of CFT columns were verified by experiment. And many construction experiment results were analyzed and an equation for the mix proportioning strength of concrete used for CFT was proposed.