Freeze-thaw durability of dry cast cementitious mixtures
US7922808B2 · kind B2 · utility
20Cited by
31References
20Claims
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Key dates
| Filing date | Jun 14, 2005 |
| Grant date | Apr 12, 2011 |
| Priority date | — |
| Expiry date | Apr 22, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/91
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An improved freeze-thaw durability dry cast cementitious composition is provided that uses very small (0.1 μm to 100 μm average diameter) polymeric microspheres that are blended directly into the mixture and optionally gas-generating additives. The polymeric microspheres provide void spaces in the material matrix that act to increase freeze-thaw durability of the material. In this dry cast cementitious composition, polymeric microspheres act as pre-formed voids.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.