Microstructured carbonatable calcium silicate clinkers and methods thereof
First Claim
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1. A non-hydraulic clinker material, comprising:
- particles of uncarbonatable silica (SiO2), having diameters from about 0.1 μ
m to about 1,000 μ
m, dispersed in a matrix of the clinker, the matrix comprising at least one carbonatable calcium silicate phase,wherein the at least one carbonatable calcium silicate phase comprises at least one of wollastonite and pseudowollastonite and at least one of rankinite (Ca3 Si2O7) and belite (Ca2SiO4).
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Abstract
The invention provides novel, microstructured clinker and cement materials that are characterized by superior grindability and reactivity. The disclosed clinker and cement materials are based on carbonatable calcium silicate and can be made from widely available, low cost raw materials via a process suitable for large-scale production. The method of the invention is flexible in equipment and processing requirements and is readily adaptable to manufacturing facilities of conventional Portland cement.
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Citations
18 Claims
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1. A non-hydraulic clinker material, comprising:
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particles of uncarbonatable silica (SiO2), having diameters from about 0.1 μ
m to about 1,000 μ
m, dispersed in a matrix of the clinker, the matrix comprising at least one carbonatable calcium silicate phase,wherein the at least one carbonatable calcium silicate phase comprises at least one of wollastonite and pseudowollastonite and at least one of rankinite (Ca3 Si2O7) and belite (Ca2SiO4). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for making a clinker material, comprising:
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mixing one or more precursors to obtain a blended precursor composition wherein metal oxides of Al, Fe and Mg are present at about 30% or less by mass; and heating the blended precursor composition to a temperature between about 800°
C. and about 1400°
C. for a sufficient time to produce the clinker material,wherein, the clinker material is non-hydraulic and comprises particles of uncarbonatable silica (SiO2) having diameters from about 0.1 μ
m to about 1,000 μ
m, dispersed in a matrix of the clinker, the matrix comprising at least one carbonatable calcium silicate phase, and wherein the at least one carbonatable calcium silicate phase comprises at least one of wollastonite and pseudowollastonite and at least one of rankinite (Ca3 Si2O7) and belite (Ca2SiO4). - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification