| 摘要 |
PROBLEM TO BE SOLVED: To provide a cement based composition in which a pseudo polymer is formed in a homogeneous state, and also, values regarding viscosity, fluidity, underwater non-separability, air quantity and material separation resistance are high. SOLUTION: Disclosed is a cement based composition obtained by mixing: a binder composed of cement and expansion material powder; a thickener composed of first powder consisting of a first water soluble low molecular compound selected from cationic surfactants and second powder consisting of a second water soluble low molecular compound selected from anionic aromatic compounds; a fine aggregate; cement admixture powder; and water, and in which unit water quantity lies in the range of 415 to 485 kg/m<SP>3</SP>, the ratio between the water and binder (W/B) lies in the range of 46.5 to 59.0%, the total of the quantity of the first powder and the quantity of the second powder (Vt using quantity) lies in the range of 5.90 to 7.10 kg/m<SP>3</SP>, and the quantity of the cement admixture powder (SP using quantity) lies in the range of 0.95 to 1.50 kg/m<SP>3</SP>. COPYRIGHT: (C)2009,JPO&INPIT
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