Method for treating clay and clay-bearing aggregates and compositions therefor
US10266449B2 · kind B2 · utility
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25References
8Claims
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Key dates
| Filing date | Sep 23, 2016 |
| Grant date | Apr 23, 2019 |
| Priority date | — |
| Expiry date | Sep 23, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2103/32
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention provides compositions and methods involving the use of a carboxylate graft polymer having high molecular weight and low ratio of acid-to-polyoxyalkylene groups. Such clay-mitigation is particularly useful for treating clay and clay-bearing aggregates, particularly those aggregates used for construction purposes. The present invention minimizes the need to wash the aggregates, thus preserving fine aggregates (“fines”) content in construction materials, and thereby beneficiating the performance and/or properties of construction materials containing the clay-bearing aggregates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.