Cement admixture, mixed cement, and method for producing cement admixture
A cement mixture with specific rock powder properties addresses the need for alternative admixtures by enhancing fluidity and suppressing alkali-silica reaction, while improving strength development and reducing carbon emissions.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- TAIHEIYO CEMENT CORP
- Filing Date
- 2025-11-26
- Publication Date
- 2026-06-25
AI Technical Summary
The cement industry faces a need for alternative cement admixture materials to replace fly ash and blast furnace slag powder due to decreasing availability, while maintaining concrete fluidity and suppressing alkali-silica reaction, as traditional alternatives either reduce fluidity or do not enhance long-term strength development.
A cement mixture using rock powders with specific properties, including a BET specific surface area of 1.0 to 15.5 m²/g, Blaine specific surface area of 3,000 to 7,000 cm², amorphous phase of 16.0 to 60.0% by mass, and cumulative heat generation of 20 to 200 J/g, along with controlled SiO₂, Al₂O₃, MgO, and alkali contents, to achieve excellent fluidity and suppress alkali-silica reaction.
The cement mixture exhibits improved fluidity and suppresses alkali-silica reaction, with enhanced strength development and reduced carbon dioxide emissions by using a wide range of rock types as cement admixtures.
Smart Images
Figure JPOXMLDOC01-APPB-T000001 
Figure JPOXMLDOC01-APPB-T000002 
Figure JPOXMLDOC01-APPB-T000003