IMPROVEMENT OF THE CONSISTENCIES OF FRESH CONCRETE THROUGH THE REPLACEMENT OF AGGREGATE WITH MINERAL ADMIXTURES

Abstract

When a part of fine aggregate in mortar is replaced with a mineral admixture, superiority or inferiority of the consistency of the mortar can be evaluated by the ratio of average thickness of excess water film to surface-volume average diameter of the particles of the solid materials in the mortar. The ratio can be calculated with the solid volume percentage of the solid materials and the mixture proportion of mortar. Adequate improvement of the consistencies of concrete can be realized by the replacement of a part of fine and coarse aggregates with a mineral admixture when the ratio calculated with the data of the solid materials and the mixture proportion of the concrete is the largest.