Glass compositions suitable for incorporation into concrete
AssigneeJenaer Glaswerk Schott & Gen.
InventorMatthias Christian Coenen
Life of this patent
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Abstract
Glasses suitable for use as long term reinforcing agents for a cementitious matrix, e.g., Portland cement, or concrete. The glasses are preferably in the form of continuous filaments, short fibers, hollow spheres, or foamed glasses and have a composition consisting essentially of: ______________________________________ Weight Percent ______________________________________ SiO.sub.2 20-70 TiO.sub.2 3-12 ZnO 5-70 CuO 0-10 Fe.sub.2 O.sub.3 0-5 BaO 0-30 CaO 0-10 MgO 0-15 Al.sub.2 O.sub.3 0-30 ______________________________________
Claims14
Glasses suitable for use as a long term reinforcing agent in concrete or in other cementitious matrix and having a composition consisting essentially of:
- ______________________________________ Weight Percent ______________________________________ SiO.sub.2 20- 70 TiO.sub.2 3- 12 ZnO 5- 70 CuO 0- 10 Fe.sub.2 O.sub.3 0- 5 BaO 0- 30 CaO 0- 10 MgO 0- 15 Al.sub.2 O.sub.3 0- 30 ______________________________________ wherein the ratio of the molar sum of Al.sub.2 O.sub.3 + MgO + CaO to the molar sum of ZnO + CuO + TiO.sub.2 + Fe.sub.2 O.sub.3 present in the composition is equal to or less than 0.5, in which metallic oxides selected from the group consisting of As.sub.2 O.sub.3, Sb.sub.2 O.sub.3, V.sub.2 O.sub.5, B.sub.2 O.sub.3, PbO, CdO, SnO.sub.2 and M.sub.2 O wherein M is an alkali metal, if present, amount to not greater than 0.4 mole % altogether, and whereby said composition delays the curing of said concrete or cementitious matrix and increases the formation of heat when said composition reacts with said concrete or cementitious matrix.
Dependencies are inferred from the claim text.