CEMENT COMPOSITION WITH LOW HEAT AND SHRINKAGE

摘要

A low-heat and little-shrinkage cement composition is provided to prevent a crack caused by autogenous shrinkage and to show an environment-friendly effect by performing a mechano-chemical process to the cement composition. A low-heat and little-shrinkage cement composition comprises: 95-97wt% of mechano-chemical treated mixture with 3,000~4,500 cm^2/g of specific surface area, which is prepared by mixing and crushing 50-80wt% of granulated blast-furnace slag with 2,000~3,500 cm^2/g of specific surface area and 20-50wt% of normal portland cement with 2,800~3,500cm^2/g of specific surface area; and 3-5wt% of inorganic sulphate. The granulated blast-furnace slag represents amorphous materials with 1.6-2.0 of basicity. The granulated blast-furnace slag contains 40-50wt% of CaO, 1-10wt% of MgO, 10-25wt% of Al2O3 and 33-38wt% of SiO2.