| 摘要 |
PROBLEM TO BE SOLVED: To obtain a quick setting agent for cement/concrete, by which spraying concrete having good flowability, excellent adhesion to a surface to be spayed with the concrete, superior quick setting properties and lesser rebound, can be obtained. SOLUTION: This quick setting agent contains: 100 pts.wt. of at least one quick setting component (A component) selected from calcium aluminate, CaO- Na2O-Al2O3 based compounds, CaO-Al2O3-Fe2O3 based compounds, CaO-Al2O3-SO3 based compounds and alkali aluminates; and a corresponding amount (pts.wt.) of at least one component (component B), selected from 0.05-10 pts.wt. of hydrated active alumina, 0.2-10 pts.wt. of aluminum hydroxide having a 0.1-30 μm average particle size, 0.02-0.4 pts.wt. of poly(meth)acrylic salts and 0.01-6 pts.wt. of quaternized poly(meth)acrylates. |
