Patent 7445668 was granted and assigned to Vicat on November, 2008 by the United States Patent and Trademark Office.
The invention relates to a hydraulic binder containing, in percentage by weight:from 1.1 to 9% of tricalcium aluminatefrom 1.5 to 13.5% of tetracalcium ferroaluminatefrom 0.5 to 1.5% of dodecacalcium heptaaluminatefrom 0.5 to 1.5% of tetracalcium trialuminate sulphatefrom 0 to 0.8% of dicalcium silicoaluminatefrom 5 to 70% of pozzolanic material(s)from 0 to 6% of calcium sulphate