Admixture for producing cementitious compositions having good fluidity and high early compressive strength
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United States of America Patent
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Jul 27, 2004
Grant Date -
Sep 11, 2003
app pub date -
Dec 3, 2002
filing date -
Jan 8, 2002
priority date (Note) -
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Abstract
The present invention is an admixture for cementitious compositions that provides both good flowability and high early strength as is desired in the art. The admixture of the invention includes a superplasticizer comprising a water-soluble modified acrylic copolymer and at least one accelerant selected from the group consisting of salts of thiocyanic acid, water-soluble alkanolamines, ethylene oxide adducts of ethylenediamine, and morpholine derivatives. The combination of the superplasticizer and the accelerant used in the invention surprisingly has a synergistic effect on the early compressive strength of the cementitious composition and also enhances the W/CM ratio and the flowability of the cementitious composition.
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