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  • Method of upgrading rock and treated rock obtained therefrom
    Patent number: 4341824
    Abstract: A method is provided for upgrading rock in the form of aggregate, block, shaped stone or concrete structures involving the treatment of such rock with a dilute aqueous solution of polyelectrolyte. Enhanced degradation resistance is achieved by further wetting the polyelectrolyte treated rock with a multi-valent ion metallic salt solution. Treated aggregate, portland cement and bituminous concrete compositions containing such treated aggregate are also provided.
    Type: Grant
    Filed: April 9, 1981
    Date of Patent: July 27, 1982
    Assignee: General Electric Company
    Inventor: Donald G. LeGrand