FUNDAMENTAL PROPERTIES OF HIGH-STRENGTH CONCRETE USING COAL GASIFICATION SLAG FINE AGGREGATE

In this study, the authors investigate various properties of coal gasification slag fine aggregate (CGS) when applied to high-strength concrete. The amount of admixture using CGS concrete is lower than that of ordinary aggregate concrete. The initial compressive strength and the onset of strength up to 91-day of age were smaller than those using ordinary aggregate. Young’s modulus of CGS concrete is approximately 1.1 times of ordinary aggregate concrete. CGS concrete reduced autogenous shrinkage only in the case of ordinary portland cement. In the case of moderate heat portland cement, the autogenous shrinkage of CGS concrete is the same as land sand concrete.