DEVELOPMENT THE ENVIRONMENT-FRIENDLY NEXT-GENERATION TYPE PORTLAND BLAST-FURNACE SLAG CEMENT USING LIMESTONE POWDER

Abstract

Aiming at reducing environmental burdens such as greenhouse gas emission, protland blast-furnace slag cement partially replaced with limestone powder, at slag content of 40 percent, was studied. When the base cement was replaced with a limestone powder, with a fineness of 3,500 and 5,480cm²/g, for 10 to 30 percent, resulting mortar showed equivalent properties, fluidity and strength, with those using current portland blast-furnace slag cement. Because clinker content in produced mortar is less than that of the currently available cement, use of the newly developed cement could lead to a reduction of cement-originated CO₂ gas emission in the concrete sector.