Patents Assigned to Capitol Aggregates, Ltd.
  • Patent number: 8079538
    Abstract: An apparatus for making a cementitious composition may comprise a grinding mill for producing a cementitious composition from clinker and gypsum and classifiers for separating the cementitious composition into various portions. A primary portion of the cementitious composition has a particle size distribution such that substantially all of its particles are of a size of about 10 microns or smaller. A secondary portion and a remainder portion of the cementitious composition are combinable to form a resultant cementitious composition selected from Type I portland cement and Type III portland cement.
    Type: Grant
    Filed: November 12, 2010
    Date of Patent: December 20, 2011
    Assignee: Capitol Aggregates, Ltd.
    Inventors: Louis U. Spellman, Jose Garcia
  • Patent number: 8056631
    Abstract: A cementitious composition capable of forming a high, early-phase strength cement may comprise construction grade cement and ground blast furnace slag, the ground blast furnace slag having a Blaine fineness less than about 250 m2/kg. The cementitious composition may comprise, for each 100% by weight, greater than about 50% by weight construction grade portland cement and less than about 50% by weight ground blast furnace slag, and the cementitious composition may have a Blaine fineness less than about 300 m2/kg. Methods of making and using such a cementitious composition to cement a structure are also described.
    Type: Grant
    Filed: January 21, 2009
    Date of Patent: November 15, 2011
    Assignee: Capitol Aggregates, Ltd.
    Inventors: Jose Garcia, Louis U. Spellman
  • Patent number: 7927417
    Abstract: A cementitious composition capable of forming high early strength cement when admixed with water may comprise, for each 100% by weight, no more than about 60% by weight C3S, at least about 4% by weight C2S, and between about 7% and about 11% by weight SO3, wherein the cementitious composition has a particle size distribution such that substantially all of its particles are of a size of about 10 microns or smaller. A cementitious composition may have a ratio of weight % SO3 to weight % Al2O3 of at least about 1.5 and a particle size distribution such that substantially all of its particles are of a size of about 10 microns or smaller. An apparatus and method for making such a cementitious composition are also described.
    Type: Grant
    Filed: February 4, 2008
    Date of Patent: April 19, 2011
    Assignee: Capitol Aggregates, Ltd.
    Inventors: Louis U. Spellman, Jose Garcia
  • Patent number: 6733583
    Abstract: The present invention provides a method of producing a blended cement capable of meeting ASTM C-595 and C-1157 standards. The blended cement of the present invention contains portland cement clinker, calcium sulfate and volcanic ash. The volcanic ash utilized by the present invention has been subjected to heat in the range of between 800° F. and 1300° F. and contains between 40% and 45% hollow spheres unable to pass #325 sieve. The portland cement clinker, calcium sulfate and volcanic ash are interground to an ultimate blaine fineness of between 350 m2/kg and 500 m2/kg to produce a blended cement capable of subsequent admixing with class C fly ash to produce synergistic effects.
    Type: Grant
    Filed: March 11, 2002
    Date of Patent: May 11, 2004
    Assignee: Capitol Aggregates, Ltd.
    Inventors: Max L. Frailey, John G. Wheeler
  • Publication number: 20020129743
    Abstract: The present invention provides a method of producing a blended cement capable of meeting ASTM C-595 and C-1157 standards. The blended cement of the present invention contains portland cement clinker, calcium sulfate and volcanic ash. The volcanic ash utilized by the present invention has been subjected to heat in the range of between 800° F. and 1300° F. and contains between 40% and 45% hollow spheres unable to pass #325 sieve. The portland cement clinker, calcium sulfate and volcanic ash are interground to an ultimate blaine fineness of between 350 m2/kg and 500 m2/kg to produce a blended cement capable of subsequent admixing with class C fly ash to produce synergistic effects.
    Type: Application
    Filed: March 11, 2002
    Publication date: September 19, 2002
    Applicant: Capitol Aggregates, Ltd.
    Inventors: Max L. Frailey, John G. Wheeler