ESTIMATION METHOD OF MATERIAL ISOLATION RESISTANCE PROPERTY OF HIGH FLUIDITY CONCRETE

PROBLEM TO BE SOLVED: To provide an estimation method of material isolation resistance property of high fluidity concrete which can objectively and quantitatively estimate the material isolation resistance property before high fluidity concrete is layed. SOLUTION: To a concrete specimen which is flatly stretched after a slump flow test, the distance between the outer peripheral part of a mortar component and the center of gravity of course aggregate which positions at the end portion in the radial direction and has a grain diameter of at least a specified value is measured. The measured values are averaged. A fist test method judges whether the average value is in a range of specified set value. The concrete specimen is divided into an annular outside part and an inside part. To the course aggregate having a grain diameter of at least a specified value, the course aggregate density of the whole concrete specimen, that of the outside part, and that of the inside part are obtained. A second test method judges whether these densities of course aggregate are nearly equal. The material isolation resistance property is estimated by whether both of the results of the tests are satisfied.