FIRMING COMPOSITION FOR HARDENING WEAK GROUND USING EARLY-STRENGTH CEMENT AND INDUSTRIAL BY-PRODUCT OF MINERALS AND THE MANUFACTURING METHOD THEREOF

摘要

PURPOSE: A solidifying composition for soft ground using early strength cement and industrial byproduct minerals is provided to be effectively used in soil improvement by using surface soil stabilization method during winter and to use massive industrial byproduct minerals, thereby reducing the cost of materials for solidification agent and keeping up with the current use trend of low-carbon materials. CONSTITUTION: A solidifying composition for soft ground using early strength cement and industrial byproduct minerals comprises 35 to 60 wt% early strength cement, 20 to 30 wt% ground granulated blast-furnace slag, 5 to 10 wt% fly ash, and 15 to 25 wt% desulfurized gypsum which is byproduct from steel production or oil refinery. The early strength cement is made by crushing gypsum mixed with early strength cement clinker which includes 0.65 to 0.85 wt% sulfur trioxide and has a lime saturation factor of 91.5 to 93.5% with respect to the total weight of the solidifying composition. The fineness of the early strength cement is 5,000 to 5,200 cm2/g.