| 摘要 |
PURPOSE:To provide a cement composition suppressed in temp. rising due to the heat of hydration of concrete, mortal, grout or the like and improved in retarding property. CONSTITUTION:This cement composition contains a modified starch 30-60 deg.C in gelatinization starting temp. and 20-5000cP in the viscosity of gelatinized solution at 50 deg.C in 25% aq. solution by 0.05-10wt.% based on the cement. |
