The powdered self leveling Characteristic cement constituent where the powdered self leveling Characteristic

摘要

PROBLEM TO BE SOLVED: To obtain the subject composition easy in a kneading work at a building site, little in the deterioration of flowability with the passage of time and excellent in initial flowability and working characteristics by mixing a cement with silica to whose surface a polyether-based fluidizing agent is adhered. ;SOLUTION: Silica having particle diameters in a particle diameter range of 10-2,000 μm and having an average particle diameter of 50-500 μm is immersed in the aqueous solution of a polyether-based fluidizing agent, dehydrated and subsequently dried to obtain the silica to whose surface the polyether-based fluidizing agent is adhered in an amount of 0.1-100 pts.wt. per 100 pts.wt. of the silica. The silica is compounded with a cement so that a value of (cement)/[(cement)f(silica to whose surface the polyether-based fluidizing agent is adhered)] is 55-65 wt.%. The silica to whose surface the polyether-based fluidizing agent is adhered may be mixed with silica to whose surface the polyether-based fluidizing agent is not adhered, so that the amount of the polyether-based fluidizing agent is 0.1-5 pts.wt., preferably 0.5-3 pts.wt., per 100 pts.wt. of the total amount of the silica.;COPYRIGHT: (C)1999,JPO