Additive-incorporated building materials
AssigneeYissum Research Development Company of the Hebrew University of Jerusalem
InventorsYoel Sasson, Hani Gnayem
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Abstract
Bismuth oxyhalide-added building materials are disclosed. The building material is a binder-containing building material, which sets and harden when mixed with water, such as gypsum and cement-based building material. Methods for applying bismuth oxyhalide—comprising coatings onto surfaces of building materials, to protect them against pollutants, are described.
Claims8
Bismuth oxyhalide-added gypsum, wherein the bismuth oxyhalide is selected from the group consisting of BiOClyBr1-y [0.6≤y≤0.95];
- Bi(0) doped-BiOCl;
- Bi(0) doped-BiOBr;
- and Bi(0) doped-BiOClyBr1-y [0.6≤y≤0.95].
A method for preparing bismuth oxyhalide-coated gypsum, comprising mixing plaster of Paris powder (CaSO4.0.5H2O) and water, allowing a so-formed mass to set and harden partially, applying onto the surface of the mass an aqueous suspension of bismuth oxyhalide microspheres selected from the group consisting of BiOClyBr1-y [0.6≤y≤0.95];
- Bi(0) doped-BiOCl;
- Bi(0) doped-BiOBr;
- and Bi(0) doped-BiOClyBr1-y [0.6≤y≤0.95], and allowing the mass to dry and solidify.
Dependencies are inferred from the claim text.