Cementitious reagents, methods of manufacturing and uses thereof
AssigneeTerra Co2 Technology Holdings, Inc.
InventorDonald John Lake
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Abstract
Described are cementitious reagent materials produced from globally abundant inorganic feedstocks. Also described are methods for the manufacture of such cementitious reagent materials and forming the reagent materials as microspheroidal glassy particles. Also described are apparatuses, systems and methods for the thermochemical production of glassy cementitious reagents with spheroidal morphology. The apparatuses, systems and methods makes use of an in-flight melting/quenching technology such that solid particles are flown in suspension, melted in suspension, and then quenched in suspension. The cementitious reagents can be used in concrete to substantially reduce the CO2 emission associated with cement production.
Claims20
A cementitious reagent comprising a mixture of microspheroidal glassy particles, wherein said particles comprise:
- a mean roundness (R) greater than 0.8;
- less than 20% of particles having an angular morphology with roundness (R) less than 0.7;
- an oxide composition according to the formula:
- (CaO,MgO)a·(Na2O,K2O)b·(Al2O3,Fe2O3)c·(SiO2)d, wherein a is 0 to 4, b is 0.1 to 1, c is 1, and d is 1 to 20;
- an amorphous content of 45% to 100%;
- and
- molar composition ratios of (Ca,Mg)0-12·(Na,K)0.05-1·(Al,Fe3+)1·Si1-20.
Dependencies are inferred from the claim text.