Use of mineral fines to reduce clinker content of cementitious compositions
US12151974B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 16, 2021 |
| Grant date | Nov 26, 2024 |
| Priority date | — |
| Expiry date | Apr 28, 2043 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/91
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Mineral fines reduce OPC content in concrete, mortar and other cementitious compositions, typically in combination with a pozzolanically active SCM. Mineral fines can replace and/or augment a portion of hydraulic cement and/or fine aggregate. Mineral fines can replace a portion of cement binder and fine aggregate as an intermediate that fills a size void between largest cement particles and smallest fine aggregate particles. Supplemental lime can enhance balance of calcium ions in the mix water and/or pore solution. Supplemental sulfate can address sulfate deficiencies caused by high clinker reduction, use of water reducers and/or superplasticizers, and SCMs containing aluminates. Concentrated or pure carbon dioxide (CO2) can be used to passivate alkaline values in highly alkaline materials, such as concrete washout fines, CKD, class C flyash, incinerator ash, bottom ash, or biomass ash. CO2 passivation or sequestration can be carried out before, during or after forming an initial concrete mix.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.