# US 8,465,814 B2 · High strength foam glass > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,465,814 B2 - Document ID: US8465814B2 - Status: Granted - Kind: B2 - Application number: 12/281,988 - Filed: 2007-03-20 - Published: 2009-09-03 - Granted: 2013-06-18 - Earliest claimed: 2006-03-21 - Assignees: Imerys Filtration Minerals, Inc. - Applicants: Bo Wang - Inventors: Bo Wang - Web page: https://patentgrep.com/patent/US8465814B2 ## CPC - C03C 11/007: {Foam glass, e.g. obtained by incorporating a blowing agent and heating} - E04D 1/16: of ceramics, glass or concrete, with or without reinforcement - C03C 2214/02: Fibres; Filaments; Yarns; Felts; Woven material - Y10T 428/12729: Group IIA metal-base component - Y10T 428/12736: Al-base component - Y10T 428/131: Glass, ceramic, or sintered, fused, fired, or calcined metal oxide or metal carbide containing [e.g., porcelain, brick, cement, etc.] - Y10T 428/1314: Contains fabric, fiber particle, or filament made of glass, ceramic, or sintered, fused, fired, or calcined metal oxide, or metal carbide or other inorganic compound [e.g., fiber glass, mineral fiber, sand, etc.] - Y10T 428/24355: Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.] - Y10T 428/249953: Composite having voids in a component [e.g., porous, cellular, etc.] - Y10T 428/26: Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension - Y10T 428/27: Web or sheet containing structurally defined element or component, the element or component having a specified weight per unit area [e.g., gms/sq cm, lbs/sq ft, etc.] - C03C: CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS - E04D: ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS (coverings of outer walls by plaster or other porous material E04F13/00) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract Disclosed herein are foam glasses and compositions comprising such foam glasses, which can be used, for example, in structural applications. The foam glass can have one or more properties, such as a density ranging from about 20 Ib/ft3 to about 100 Ib/ft3, a compressive strength of at least about 650 psi, and an alumina content of at least about 5% by weight, relative to the total weight of the foam glass. Also disclosed are methods for preparing foam glasses. ## Claims ### Claim 1 A foam glass having a density ranging from about 20 lb/ft3 to about 100 lb/ft3, a compressive strength of at least about 650 psi, and an alumina content of at least about 5% by weight, relative to the total weight of the foam glass. ### Claim 2 (depends on 1) A foam glass according to claim 1, wherein the density ranges from about 25 lb/ft3 to about 35 lb/ft3. ### Claim 3 (depends on 1) A foam glass according to claim 1, wherein the density ranges from about 60 lb/ft3 to about 75 lb/ft3. ### Claim 4 (depends on 1) A foam glass according to claim 1, wherein the compressive strength is at least about 700 psi. ### Claim 5 (depends on 1) A foam glass according to claim 1, wherein the compressive strength is at least about 900 psi. ### Claim 6 (depends on 1) A foam glass according to claim 1, wherein the compressive strength is at least about 1000 psi. ### Claim 7 (depends on 1) A foam glass according to claim 1, wherein the compressive strength is at least about 1500 psi. ### Claim 8 (depends on 1) A foam glass according to claim 1, wherein the compressive strength is at least about 2000 psi. ### Claim 9 (depends on 1) A foam glass according to claim 1, wherein the compressive strength is at least about 2500 psi. ### Claim 10 (depends on 1) A foam glass according to claim 1, wherein the compressive strength is at least about 3000 psi. ### Claim 11 (depends on 1) A foam glass according to claim 1, wherein the alumina content ranges from about 5% to about 15% by weight, relative to the total weight of the foam glass. ### Claim 12 (depends on 1) A foam glass according to claim 1, wherein the alumina content ranges from about 6% to about 12% by weight, relative to the total weight of the foam glass. ### Claim 13 (depends on 1) A foam glass according to claim 1, wherein the alumina content ranges from about 8% to about 10% by weight, relative to the total weight of the foam glass. ### Claim 14 (depends on 1) A foam glass according to claim 1, further comprising boron in an amount ranging from about 5 pphg to about 15 pphg. ### Claim 15 (depends on 1) A foam glass according to claim 1, further comprising boron in an amount ranging from about 7 pphg to about 10 pphg. ### Claim 16 (depends on 1) A foam glass according to claim 1, further comprising calcium carbonate in an amount ranging from about 5 pphg to about 10 pphg. ### Claim 17 (depends on 1) A foam glass according to claim 1, further comprising silica in an amount ranging from about 50% to about 55% by weight, relative to the total weight of the foam glass. ### Claim 18 (depends on 1) A foam glass according to claim 1, wherein the foam glass is a porous material having an average pore size ranging from about 0.5 mm to about 3 mm. ### Claim 19 (depends on 1) A foam glass according to claim 1, wherein the foam glass is a porous material having an average pore size ranging from about 0.1 mm to about 2 mm. ### Claim 20 (depends on 1) A foam glass according to claim 1, wherein the foam glass is a porous material having an average pore size ranging from about 0.2 mm to about 1 mm. ### Claim 21 (depends on 1) A pipe comprising the foam glass according to claim 1. ### Claim 22 (depends on 1) A foam glass according to claim 1, wherein the density ranges from about 20 lb/ft3 to about 40 lb/ft3. ### Claim 23 (depends on 22) A brick comprising the foam glass according to claim 22. ### Claim 24 (depends on 23) A brick according to claim 23, wherein the foam glass is a porous material having an average pore size ranging from about 0.5 mm to about 3 mm. ### Claim 25 (depends on 1) A foam glass according to claim 1, wherein the density ranges from about 50 lb/ft3 to about 80 lb/ft3. ### Claim 26 (depends on 25) A roofing tile comprising the foam glass according to claim 25. ### Claim 27 (depends on 26) A roofing tile according to claim 26, wherein the foam glass is a porous material having an average pore size ranging from about 0.1 mm to about 2 mm. ### Claim 28 (depends on 26) A roofing tile according to claim 26, wherein the foam glass is a porous material having an average pore size ranging from about 0.2 mm to about 1 mm. ### Claim 29 (depends on 26) A roofing tile according to claim 26, wherein the foam glass has a transverse strength ranging from about 200 pounds to about 500 pounds, 12 inch test span. ### Claim 30 (depends on 26) A roofing tile according to claim 26, wherein the foam glass has a transverse strength ranging from about 250 pounds to about 400 pounds, 12 inch test span. ### Claim 31 (depends on 1) A foam glass according to claim 1, further comprising at least one reinforcing material. ### Claim 32 (depends on 31) A foam glass according to claim 31, wherein the at least one reinforcing material is a nickel-chromium-iron alloy mesh. ### Claim 33 (depends on 1) A foam glass according to claim 1, further comprising at least one colorant. ### Claim 34 (depends on 33) A foam glass according to claim 33, wherein the at least one colorant is chosen from Fe2O3, Co3O4, CuSO4, CuO, and Cu2O. ### Claim 35 A foam glass having a density of less than about 100 lb/ft3, a compressive strength of at least about 650 psi, and a thickness of less than about 2 inches. ### Claim 36 (depends on 35) A foam glass according to claim 35, wherein the density is less than about 80 lb/ft3. ### Claim 37 A roofing tile comprising a foam glass having a density of less than about 100 lb/ft3, and a compressive strength of at least about 650 psi.