Cement-additive for inhibiting concrete-deterioration
US5435846A · kind A · utility
47Cited by
6References
7Claims
0Family size
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Key dates
| Filing date | Feb 18, 1994 |
| Grant date | Jul 25, 1995 |
| Priority date | — |
| Expiry date | Feb 18, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2103/0087
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A cement additive for inhibiting concrete deterioration contains as an effective component a powder mixture of an inorganic cation exchanger, such as a highly calcium-substituted zeolite, and an inorganic anion exchanger, such as hydrocalumite. The cement additive inhibits the alkali-aggregate reaction and the corrosion of reinforcing steel, thereby protecting concrete constructions from deterioration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.