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US 11,702,365 B2Granted
Corrosion mitigating cement compositions
AssigneeFortcem Pty Limited
InventorGlenn Olven Schumacher
Life of this patent
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Abstract
Corrosion mitigating cement compositions and methods for their preparation are provided. The cement compositions are derived from self-cementing pozzolans and chemical accelerators, retarders, mechanical strength modifiers and corrosion inhibitors. The corrosion inhibitors include boron compounds such as boric acid. Concretes prepared using the cement compositions possess low conductivity and a conductivity which further decreases with aging.
Claims19
A hydratable cement composition comprising:
- (a) lactic acid in an amount up to about 8.0% by weight;
- (b) one or more alkali metal hydroxides or carbonates in an amount up to about 9.0% by weight;
- (c) one or more corrosion inhibiting boron containing compounds in an amount up to about 5.0% by weight;
- (d) between about 48% and about 93.5% by weight of one or more self-cementing pozzolans;
- (e) between about 1.5% and about 45% by weight of Portland cement;
- (f) one or more non-boron containing retarders in an amount up to about 4.0% by weight;
- and
- (g) optionally, one or more beneficiating agents in an amount up to about 20% by weight.
5 more elements
Dependencies are inferred from the claim text.