Use of mineral fines to reduce clinker content of cementitious compositions
US11168029B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 6, 2020 |
| Grant date | Nov 9, 2021 |
| Priority date | — |
| Expiry date | Jul 6, 2040 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/91
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Mineral fines are used to reduce clinker content in concrete, mortar and other cementitious compositions, typically in combination with one or more pozzolanically active SCMs. Mineral fines can replace and/or augment a portion of hydraulic cement binder and/or fine aggregate. Mineral fines can advantageously replace a portion of cement binder and fine aggregate, acting as an intermediate that fills a particle size void between the largest cement particles and smallest fine aggregate particles. Supplemental lime can advantageously maintain or enhance balance of calcium ions in the mix water and/or pore solution. Supplemental sulfate can advantageously address sulfate deficiencies caused by high clinker reduction, use of water reducers and/or superplasticizers, and SCMs containing aluminates. Such systematic approach to beneficially using mineral fines, SCMs, lime, and sulfate addresses many issues and permits high clinker reduction with similar or increased strength.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.