Stabilized microsilica slurries and cement compositions containing the same
AssigneeW. R. Grace & Co.-Conn.
InventorPaul Scheiner
Life of this patent
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Abstract
Aqueous-based microsilica slurries having resistance to gelling and settlement of solids are provided. The slurries contain amino alcohols as stabilizing agents, the amino alcohols having the formula ##STR1## wherein R.sup.1 and R.sup.2 are each individually hydrogen or a linear or branched alkyl group containing 1 to 6 carbon atoms; R.sup.3 is a linear or branched alkylene group containing 1 to 8 carbon atoms; and R.sup.4 and R.sup.5 are each individually hydrogen, a linear or branched alkyl group containing 1 to 8 carbon atoms, or a linear or branched hydroxyalkyl group containing 1 to 8 carbon atoms. Also provided are hydraulic cement compositions comprising a hydraulic-cement binder, microsilica, and an amino alcohol of the invention.
Claims21
A microsilica slurry comprising an aqueous-based carrier, microsilica, and an amino alcohol of the formula ##STR4## wherein R.sup.1 and R.sup.2 are each individually hydrogen or a linear or branched alkyl group containing 1 to 6 carbon atoms;
- R.sup.3 is a linear or branched alkylene group containing 1 to 8 carbon atoms;
- and R.sup.4 and R.sup.5 are each individually hydrogen, a linear or branched alkyl group containing 1 to 8 carbon atoms, or a linear or branched hydroxyalkyl group containing 1 to 8 carbon atoms.
A hydraulic cement slurry composition comprising water, hydraulic cement, microsilica, and an amino alcohol of the formula ##STR5## wherein R.sup.1 and R.sup.2 are each individually hydrogen or a linear or branched alkyl group containing 1 to 6 carbon atoms;
- R.sup.3 is a linear or branched alkylene group containing 1 to 8 carbon atoms;
- and R.sup.4 and R.sup.5 are each individually hydrogen, a linear or branched alkyl group containing 1 to 8 carbon atoms, or a linear or branched hydroxyalkyl group containing 1 to 8 carbon atoms.
Dependencies are inferred from the claim text.