| 摘要 |
PURPOSE:To improve hardness, strength and acid resistance by including ultrafine particulate silica, alumina, iron, magnesia, titanium, calcium and zirconia in a hydraulic coagulant. CONSTITUTION:With 30-45 pts.wt. silica containing 10-15 pts.wt. ultrafine particulate silica having <=1mum particle diameter, are blended 33-35 pts.wt. alumina, 0.6-1.0 pt.wt. iron, 0.5-1.0 pt.wt. magnesia, 1.5-2.0 pts.wt. titanium, 23-25 pts.wt. calcium and 1-5 pts.wt. zirconia. Thereby, 100 pts.wt. hydraulic coagulant is obtained. A mixture of 40-50vol.% resultant hydraulic coagulant with 50-60vol.% aggregate and water is filled in a forming mold, staionarily cured and hardened to afford the objective coagulated formed product. |
