Hydraulic binder and cement compositions containing photocatalyst particles
AssigneeItalcementi S.p.A.
InventorsLuigi Cassar, Carmine Pepe
Life of this patent
Estimating the term…
Abstract
The invention provides a hydraulic binder, dry premixes and cement compositions having the improved property of maintaining unaltered, brilliance and coloring quantity for a longer time period. These compositions contain, in bulk, particles of a photocatalyst capable of oxidizing polluting substances in the environment in the presence of light, oxygen and water.
Claims11
Cement composition, containing in bulk photocatalyst particles able to oxidize polluting substances in the presence of light, air, and environmental humidity, said composition comprising water, coarse or fine aggregates, a hydraulic binder and photocatalyst particles selected from the group consisting of tungstic oxide (WO3), strontium titanate (SrTiO3), calcium titanate and titanium dioxide (TiO2), or precursor thereof, when the photocatalyst particles are particles of titanium dioxide, at least 5% by weight of said particles of titanium dioxide have the anatase structure, said photocatalyst particles present in an amount ranging from 0.01 to 10.0% by weight with respect to the hydraulic binder.
Dry premix containing in bulk photocatalyst particles able to oxidize polluting substances in the presence of light, air, and environmental humidity, said premix comprising, coarse or fine aggregates, a hydraulic binder and photocatalyst particles selected from the group consisting of tungetic oxide (WO3), strontium tizanate (SrTiO3), calcium titanate and titanium dioxide (TiO2), or a precursor thereof, when the photocatalyst particles are particles of titanium dioxide, at least 5% by weight of said particles of titanium dioxide have the anatase structure, said photocatalyst particles being present in an amount ranging from 0.01 to 10% by weight with respect to the hydraulic binder.
Dependencies are inferred from the claim text.