Patents Assigned to Lafarge (Societe Anonyme)
  • Compound of calcium carbonate and of tobermorites, its manufacture and its applications
    Patent number: 3998651
    Abstract: A compound of calcium carbonate and of hydrated tobermorites, constituted of 70 to 15% tobermorites, which may contain free hydrated silica in amounts to 0 to 15% in weight expressed in SiO.sub.2, and of 30 to 85% calcium carbonate. The process includes completely hydrating white Portland cements between about 5 and 100.degree. C to form a paste having a dry extract of 5 to 70% by weight until at least a decrease in the pH-value occurs.The compound is an industrial charge particularly for paper-making and paint-making industries.
    Type: Grant
    Filed: November 1, 1974
    Date of Patent: December 21, 1976
    Assignee: Lafarge (Societe Anonyme)
    Inventors: Jacques Baudouin, Jean-Pierre Caspar
  • Composition of calcium carboaluminates and of tobermorites, process for its manufacture and its application
    Patent number: 3992217
    Abstract: A calcium-alumino composition formed by carbonating at a temperature between about 20.degree. to 100.degree. C, a hydrate of a water paste of an anhydrous calcium-alumino binder and an anhydrous calcium-silico binder formed at a temperature between about 5.degree. and 100.degree. C, said paste having a dry extract of about 5 to 70% by weight.
    Type: Grant
    Filed: November 1, 1974
    Date of Patent: November 16, 1976
    Assignee: Lafarge (Societe Anonyme)
    Inventors: Jacques Baudouin, Jean-Pierre Caspar
  • Compound of a calcium trisulfoaluminate base, and process for its manufacture
    Patent number: 3992220
    Abstract: A composition is essentially of an ettringite base and contains from about 45 to 93% calcium trisulfoaluminate and from about 7 to about 55% tobermorites, of which from about 0 to 25% is hydrated silica, counted in the form of SiO.sub.2.
    Type: Grant
    Filed: November 11, 1974
    Date of Patent: November 16, 1976
    Assignee: Lafarge (Societe Anonyme)
    Inventors: Jacques Baudouin, Jean-Pierre Caspar