摘要 |
Cement mixt. (I) comprises (a) a cement; (b) fly ash contg. 15-45 wt.% CaO; (c) an hydroxycarboxylic acid; and (d) a water-soluble source of alkali metal ions. An additive for cement mixts. contg. fly ash comprising an alkalimetal salt of hydroxycarboxylic acids or a mixt. of a hydroxycarboxylic acid with alkali metal carbonates, bicarbonates or hydroxides is also claimed. (b) contains 25-30 wt.% CaO. Molar ratio of alkali metal ions:hydroxycarboxylic acids is 0.5-1.5:1, pref. 0.6-1:1. (c) contains alkalimetalcarbonates, bicarbonates or hydroxides. (c) and (d) are present as alkali metal salts of a hydroxycarboxylic acid. (I) esp. contains 71-73% (b), 25-26% (a) and 2.5-3.5 salt, and opt. 60-80 wt.% sand. USE/ADVANTAGE - (I) is used as a concrete, mortar or casting mortar, in the building industry. (I) has high strength
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申请人 |
SANDOZ-PATENT-GMBH, 7850 LOERRACH, DE |
发明人 |
BROOK, JOHN W., MANTUA, OHIO, US;FACTOR, DAVID F., HIRAM, OHIO, US;KINNEY, FREDERICK D., BROADVIEW HEIGHTS, OHIO, US;MCCALLEN, CELESTE L., WEXFORD, PA., US;YOUNG, ANDREA M., REDONDO BEACH, CALIF., US |