Back to results
US 12,398,076 B1Granted
Mitigation of alkali-silica reaction in concrete using lithium-stabilized dispersion of silica
AssigneeNyacol Nano Technologies, Inc.
InventorRobert J. Nehring, Jr.
Life of this patent
Estimating the term…
Abstract
Method and composition for mitigating alkali-silica reaction in concrete. According to one embodiment, the composition may comprise a lithium-stabilized colloidal silica or a powder that is obtained from a lithium-stabilized colloidal silica. The composition may be used as an admixture for a concrete mix that also comprises cement, one or more aggregates, water and, optionally, one or more supplementary cementitious materials.
Claims17
A concrete mix, the concrete mix comprising:
- (a) a cement;
- (b) an aggregate;
- (c) an alkali-silica reaction mitigating agent, the alkali-silica reaction mitigating agent comprising at least one of (i) a lithium-stabilized dispersion of silica and (ii) a powder obtained by drying the lithium-stabilized dispersion of silica, wherein the lithium-stabilized dispersion of silica comprises a lithium-stabilized colloidal silica, wherein the lithium-stabilized colloidal silica comprises silica particles having a particle size of about 6 nm, and wherein the lithium-stabilized colloidal silica has a density of about 1.085 g/ml, a pH of about 9.8, a % Li2O of about 0.20, a viscosity of about 4 cps, a conductivity of about 4130 uS, a gravimetric solids percentage of about 13.7%, a surface area by Sears method of about 513 m2/g, and a calculated particle size of about 5.3 nm;
- and
- (d) water.
2 more elements
A concrete mix, the concrete mix comprising:
- (a) a cement;
- (b) an aggregate;
- (c) an alkali-silica reaction mitigating agent, wherein the alkali-silica reaction mitigating agent comprises a powder obtained by drying a lithium-stabilized dispersion of silica and wherein the lithium-stabilized dispersion of silica is a lithium-stabilized colloidal silica;
- and
- (d) water.
2 more elements
A concrete mix, the concrete mix comprising:
- (a) cement;
- (b) sand;
- (c) stone/aggregate;
- (d) water;
- and
- (e) a lithium-stabilized colloidal silica, wherein the lithium-stabilized colloidal silica has a density of about 1.085 g/ml, a pH of about 9.8, a % Li2O of about 0.20, a viscosity of about 4 cps, a conductivity of about 4130 uS, a gravimetric solids percentage of about 13.7%, a surface area by Sears method of about 513 m2/g, and a calculated particle size of about 5.3 nm.
3 more elements
Dependencies are inferred from the claim text.