ACTIVITY ESTIMATION METHOD FOR MIXED MATERIAL FOR CEMENT, ACTIVITY ESTIMATION DEVICE, AND PREPARATION METHOD OF MIXED CEMENT

摘要

PROBLEM TO BE SOLVED: To provide an activity estimation method for mixed material for cement capable of easily and accurately estimating the activity index, and an activity estimation device and a preparation method of mixed cement.;SOLUTION: The estimation method of activity index of an admixture which is used being mixed with cement, the method includes: a step S1 in which a sample is prepared by mixing cement, the admixture and reaction activator and water at a predetermined water-powder ratio; a step S2 in which accumulated calorific value of the sample is measured under a predetermined desired acceleration temperature; a step S3 in which the activity index of the admixture is estimated on the basis of a relationship among the measured accumulated calorific value of the sample, an accumulated calorific value of the sample, which previously comprehended, and the activity index of the admixture.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2018,JPO&INPIT