Cementitious reagents, methods of manufacturing and uses thereof
AssigneeTerra Co2 Technology Holdings, Inc.
InventorDonald John Lake
Life of this patent
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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:
- microspheroidal glassy particles having a mean roundness (R) >0.7, and a molar composition containing Si and Al and optionally one or more of Fe, Ca, Mg, Na, and K, wherein:
- about
-
-
- 0.3
- <
-
- Si
- Si
- +
- Al
- +
- Fe
- +
- Ca
- +
- Mg
- +
- Na
- +
- K
- <
- about
-
-
- 0.6
- ;
- about
-
-
- 0.2
- <
- Al
- Si
- +
- Al
- +
- Fe
- +
- Ca
- +
- Mg
- +
- Na
- +
- K
- <
- about
-
-
- 0.35
- ;
- and
- wherein the molar composition comprises (Ca,Mg)0-12⋅(Na,K)0.05-1⋅(Al, Fe3+)1⋅Si1-20.
A cementitious reagent comprising:
- microspheroidal glassy particles having a mean roundness (R) >0.7, and a molar composition containing Si and Al and optionally one or more of Fe, Ca, Mg, Na, and K, wherein:
- about
-
-
- 0.3
- <
-
- Si
- Si
- +
- Al
- +
- Fe
- +
- Ca
- +
- Mg
- +
- Na
- +
- K
- <
- about
-
-
- 0.6
- ;
-
- about
-
-
- 0.2
- <
- Al
- Si
- +
- Al
- +
- Fe
- +
- Ca
- +
- Mg
- +
- Na
- +
- K
- <
- about
-
-
- 0.35
- ;
-
- and
- wherein the cementitious reagent has a molar ratio Si/(Fe3+,Al) of between about 1 and about 20, and a CaO content of about 10 wt. % or less.
A cementitious reagent comprising:
- microspheroidal glassy particles having a mean roundness (R) >0.7, and a molar composition containing Si and Al and optionally one or more of Fe, Ca, Mg, Na, and K, wherein:
- about
-
-
- 0.3
- <
-
- Si
- Si
- +
- Al
- +
- Fe
- +
- Ca
- +
- Mg
- +
- Na
- +
- K
- <
- about
-
-
- 0.6
- ;
- about
-
-
- 0.2
- <
- Al
- Si
- +
- Al
- +
- Fe
- +
- Ca
- +
- Mg
- +
- Na
- +
- K
- <
- about
-
-
- 0.35
- ;
- and
- wherein the cementitious reagent has a molar ratio Si/(Fe3+,Al) of between about 1 and about 20, and a CaO content of between about 20 wt. % and about 45 wt. %.
Dependencies are inferred from the claim text.