| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a concrete composition for centrifugal casting developing high strength in centrifugally casted concrete secondary products such as a pile, a pole, a Hume pipe and the like. <P>SOLUTION: The concrete composition for centrifugal casting developing high strength contains high-early strength portland cement, a high strength admixture, a dispersant, an aggregate and water and is characterized by that the content of hemihydrate gypsum in the high-early strength portland cement is 20-80 mass%, the high strength admixture contains anhydrous gypsum and amorphous silica, the mass ratio of anhydrous gypsum to amorphous silica in the high strength admixture is 15/85-80/20 and the dispersant is a polycarboxylic acid-based dispersant. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
