CEMENT SUBSTITUENT FOR INITIAL STRENGTH-COMPENSATING CONCRETE AND INITIAL STRENGTH-COMPENSATING CONCRETE CONTAINING THE CEMENT SUBSTITUENT

摘要

PURPOSE: A cement substituent for an initial strength-compensating concrete and an initial strength-compensating concrete containing the cement substituent are provided, to obtain a cement substituent with preventing the deterioration of initial strength by recycling industrial waste materials. CONSTITUTION: The cement substituent comprises 40-60 wt% of slag fine powder having a viscosity of 3.0-3.1 and a specific surface area of 5,500-6,000 cm2/g; 0.5-2.5 wt% of calcium oxide; 0.5-1.0 wt% of lithium carbonate; and the balance of fly ash fine powder having a viscosity of 2.2-2.35 and a specific surface area of 4,200-4,800 cm2/g. The initial strength-compensating concrete is such that 20-30 wt% of cement is replaced by the cement substituent.