| 摘要 |
PROBLEM TO BE SOLVED: To provide a highly segregation-resistant concrete admixture or mortar admixture added to produce high-fluidity self-compacting concrete or mortar. SOLUTION: The cement admixture is one wherein, when a polysaccharide gum and a cement water reducing agent are used in order to obtain high-fluidity concrete or mortar, the polysaccharide gum is completely dissolved in a solution of the cement reducing agent. Its production method comprises adding a small amount of water or the solution of the water-reducing agent to the polysaccharide gum to knead the resulting mixture into a somewhat hard paste, agitating the paste while adding the solution of the water reducing agent thereto little by little to perfectly dissolve the polysaccharide gum in the cement reducing agent while keeping the water absorptivity of all the polysaccharide gum molecules uniform. COPYRIGHT: (C)2008,JPO&INPIT |
