Light-weight aggregate
Patent 4624711 Issued on November 25, 1986. Estimated Expiration Date: 
November 7, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
November 7, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2987411 3141857 3814614 Method of producing stabilized aqueous dispersions of silica fume Apparatus for inserting elements into a workpiece Rapid set lightweight cement product Patent #: 4501830 InventorAssigneeApplicationNo. 06/669284 filed on 11/07/1984US Classes:106/405, Fly ash, coal ash, or bottom ash or derived therefrom106/122, Pore forming106/409, Hollow, porous or foam particle containing524/447Kaolin or bentoniteExaminersPrimary: Yarbrough, Amelia B.Attorney, Agent or FirmInternational ClassesC04B 18/04 (20060101)C04B 18/00 (20060101) C04B 18/14 (20060101) C04B 18/02 (20060101) C04B 28/02 (20060101) C04B 28/00 (20060101) C04B 24/00 (20060101) C04B 24/16 (20060101) AbstractA light-weight aggregate, for use in production of light-weight structural products, composed of a self-hardening fly ash, a surfactant foam, and optionally an accelerator and additives. The self-hardening fly ash is preferably class C fly ash formed by the combustion of sub-bituminous coal from the Power River Basin. The surfactant foam is preferably an anionic sulfate surfactant foam. The accelerator is preferably an extract of silica fume dust. The additives may include magnesium and boron compounds, other fly ashes, light-weight fillers, polymers, cement and magnesium silicate and like materials.Field of SearchPore forming | |
