CONCRETE COMPOSITION USING THE BLAST-FURNACE SLAG AND METHOD FOR THE PREPARATION THEREOF

The present invention relates to a concrete composition using blast furnace slag and manufacturing method thereof, and more particularly, to a concrete composition including cement, blast furnace slag, gravel, sand, water and hardening accelerator. The concrete composition using blast furnace slag according to the present invention uses a hydroxide ion group, silicates, a sulfur ion group and a nitric acid ion group as hardening accelerators so as to improve initial strength as initial condensation time is shortened by a hydration process after breaking impermeable film produced by the hydration process of the blast furnace slag through stimulation and provide a hardening property without additional production facility for remicon plants since the hardening accelerator is provided in powder. In addition, the initial strength is not deteriorated, an increase in unit water content is prevented and the physical property of cement is improved due to a simple mixing process of the blast furnace slag and cement.