Very fast setting cementitious composition with high early-age compressive strength
First Claim
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1. A method of providing a fast setting cementitious mixture comprising:
- mixingwater,a cementitious reactive powder comprising hydraulic cement, anda set accelerating amount of alkanolamine and polyphosphate,under conditions which provide a mixture temperature of at least about 90°
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Abstract
A method of making a rapid setting composition for cement boards is disclosed. Compositions including portland cement, fly ash, gypsum, alkanolamine and phosphate are disclosed. A synergistic interaction between the alkanolamine and phosphate increases the effectiveness of accelerating reactions thus allowing for quick setting and increased early-age compressive strength compositions.
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Citations
42 Claims
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1. A method of providing a fast setting cementitious mixture comprising:
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mixing water, a cementitious reactive powder comprising hydraulic cement, and a set accelerating amount of alkanolamine and polyphosphate, under conditions which provide a mixture temperature of at least about 90°
F. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A composition for preparing a cement board comprising a mixture of:
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a cementitious reactive powder comprising; (a)hydraulic cement; and (b)optional mineral additive; an alkanolamine and polyphosphate as accelerators for components (a) and (b); and water, formed by a method comprising mixing the mixture at a temperature of at least 90°
F. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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Specification