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A platform for research: civil engineering, architecture and urbanism
Concrete composition and mineral additive therefor
A mineral concrete additive for the manufacture of precast concrete structure or elements, comprising quarry fines having a particle size distribution with d90 of 40-90 µm, d50 of 10-30 micrometres and d10 of 1-5 microns. The quarry fines may comprise: 50-80% by weight of processed basalt stone and 20-50 wt% of one or more of limestone, granite or greywacke; 70-90 wt% of processed basalt and 10-30 wt% processed recycled concrete; or 50-90 wt% processed basalt and 10-50 wt% milled soda-lime glass powder. A concrete composition may comprise a binder fraction including the additive, an aggregate fraction and water. The binder fraction may comprise Portland cement or alkali activated binder. The concrete composition may comprise either 0.04-1.5 wt% mineral additive and 3.8-29.7 wt% binder or 0.2-7.5 wt% mineral additive and 3.0%-28.5 wt% binder; the composition may also comprise 60-92 wt% combined aggregate, 4-12 wt% water, and 0-3 wt% chemical admixture.
Concrete composition and mineral additive therefor
A mineral concrete additive for the manufacture of precast concrete structure or elements, comprising quarry fines having a particle size distribution with d90 of 40-90 µm, d50 of 10-30 micrometres and d10 of 1-5 microns. The quarry fines may comprise: 50-80% by weight of processed basalt stone and 20-50 wt% of one or more of limestone, granite or greywacke; 70-90 wt% of processed basalt and 10-30 wt% processed recycled concrete; or 50-90 wt% processed basalt and 10-50 wt% milled soda-lime glass powder. A concrete composition may comprise a binder fraction including the additive, an aggregate fraction and water. The binder fraction may comprise Portland cement or alkali activated binder. The concrete composition may comprise either 0.04-1.5 wt% mineral additive and 3.8-29.7 wt% binder or 0.2-7.5 wt% mineral additive and 3.0%-28.5 wt% binder; the composition may also comprise 60-92 wt% combined aggregate, 4-12 wt% water, and 0-3 wt% chemical admixture.
Concrete composition and mineral additive therefor
2022-09-28
Patent
Electronic Resource
English
ADDITIVE FOR CONCRETE COMPOSITION, AND CONCRETE COMPOSITION
| European Patent Office | 2020