| 摘要 |
PROBLEM TO BE SOLVED: To obtain an injection material for improving ground in which titanium oxide controls hydration reaction immediately after water addition in the hydration reaction with cement for a fixed period of time, activates the hydration reaction after the passage of the period, reduces instant stiffness, does not drop homogeneous gel strength and properly prolongs a gelling time of cement slurry. SOLUTION: This injection material for improving ground comprises a cement quick hardening material containing 2-20 pts.wt. of titanium oxide based on 100 pts.wt. of the total of titanium oxide, CaO and Al<SB>2</SB>O<SB>3</SB>, having≥50 wt.% vitrification degree and containing≥90 volume % of particles having≤50μm particle diameters. COPYRIGHT: (C)2003,JPO |
