Cementitious composition incorporating high levels of glass aggregate for producing solid surfaces
First Claim
1. A cementitious composition for a sheet-form material having an exposed solid surface comprising cement, pozzolan, and aggregate glass, wherein said pozzolan is present at about 5% to about 20% by weight, said cement is present at about 3% to about 20% by weight, the pozzolan to cement ratio is from about 1 to about 4, and the aggregate glass is at least about 70% by weight of the composition, and wherein the size of the aggregate glass is about equal to or greater than 12 mesh glass aggregate.
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Accused Products
Abstract
A cementitious composition for high density, low porosity sheet-form building materials having solid surfaces is comprised of cement, pozzolans, and a high percentage of fine and/or coarse glass aggregate, preferably present in an amount which by weight is at least 60% of the composition. The cement content is relatively low, preferably in the range of about 3% to 20% by weight, and the pozzolan to cement ratio is relatively high, preferably equal to or greater than unity, but which can suitably be in the range from 0.25 to 4. The composition preferably uses recycled glass and preferably has a high recycle content. The sheet-form material made in accordance with the invention can be used to provide exposed solid surfaces, for example, surfaces for shower walls and floors, counter-tops, table-tops, and the like, where low hydraulic permeability and high compressive and tensile strength are desired.
43 Citations
26 Claims
- 1. A cementitious composition for a sheet-form material having an exposed solid surface comprising cement, pozzolan, and aggregate glass, wherein said pozzolan is present at about 5% to about 20% by weight, said cement is present at about 3% to about 20% by weight, the pozzolan to cement ratio is from about 1 to about 4, and the aggregate glass is at least about 70% by weight of the composition, and wherein the size of the aggregate glass is about equal to or greater than 12 mesh glass aggregate.
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16. A cementitious composition for a sheet-form material having an exposed solid surface comprising
cement, pozzolan comprising at least one pozzolan selected from the group consisting of metakaolin, wollastonite, micro-silica and finely ground glass powders, said finely ground glass powders being made from recycled glass, and aggregate glass comprised of recycled fine and coarse aggregate glass, the size of the fine aggregate glass being about or less than 12 mesh glass aggregate, the cement being present at about 5% to about 10% by weight, and the pozzolan to cement ratio being greater than unity, and wherein the aggregate glass and finely ground glass powders constitute at least about 70% by weight of the composition.
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17. A cementitious composition for a sheet-form material having an exposed solid surface comprising
ordinary Portland cement (OPC) selected from the group consisting of Type I OPC and Type III OPC, a pozzolan comprising finely ground glass powders selected from the group consisting of 100 mesh, 120 mesh, and 300 mesh glass powders, and at least other one pozzolan selected from the group consisting of metakaolin, wollastonite, and micro-silica, and an aggregate glass comprised of fine and coarse aggregate glass, the OPC being present at about 3% to about 20% by weight, and the pozzolan to cement ratio being between about 1 to about 4, and wherein the aggregate glass and finely ground glass powder combined are at least about 70% by weight of the composition.
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26. A cementitious composition for a sheet-form material having an exposed solid surface comprising by weight about 3% to 20% cement, about 5% to 20% pozzolans, and about 75% to 90% aggregate glass, wherein the pozzolan to cement ratio is from about 1 to about 4, and wherein the size of the aggregate glass is about equal to or greater than 12 mesh glass aggregate, and wherein the pozzolans comprise of metakaolin, wollastonite, micro-silica, and finely ground glass powders present in the following ranges:
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metakaolin—
1.5% to 2.5% by weightwollastonite—
1.5% to 3.0% by weightmicro-silica—
0.25% to 5% by weightfinely ground glass powders—
5% to 20% by weight.
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Specification