| 摘要 |
PURPOSE:To obtain a grout material capable of providing a gel having high strength and excellent durability by adding a (saturated) aqueous solution of ammonium hydrogencarbonate to a specific colloidal silica at a specific amount. CONSTITUTION:The objective grout material obtained by adding (B) 5-40 pts.wt. (preferably 10-30 pts.wt.) ammonium hydrogencarbonate having concentration of 10% to saturated aqueous solution (preferably 10-20%) to 100 pts.vol. colloidal silica having 40-20wt.% (preferably 35-25wt.%) SiO2 concentration and <=1wt.% (preferably <=0.7wt.%) Na2O concentration and having <=10mum (preferably <=7mum) particle size and <=13cPs, (preferably <=10cPs) viscosity at 25 deg.C. |
