Method and article for improving the strength of carbonated calcium hydroxide compacts
US11427510B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 2022 |
| Grant date | Aug 30, 2022 |
| Priority date | — |
| Expiry date | Mar 25, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B40/0231
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present disclosure discloses a method and an article for improving the strength of carbonated calcium hydroxide compacts. The method includes the following steps: calcium hydroxide-rich materials, ordinary portland cement, magnesium hydroxide, pottery sand and water are mixed according to the mass ratio of 100:15-20:15-20:40-80:10-20, then the mixture was compressed, carbonated and naturally cured to obtain the carbonated compacts. The present disclosure utilizes cement hydration and magnesium hydroxide carbonation to consume the water produced by calcium hydroxide carbonation, the C-S-H gelation effect produced by cement hydration, the cementation effect of magnesium hydroxide carbonation products, the volume expansion effect of magnesium hydroxide carbonation and the gas transmission channel and internal curing effect of pottery sand further improve the carbonation degree, product gelation, thus greatly improving the strength of carbonated calcium hydroxide compacts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.