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US 12,319,630 B2Granted
Phlego cement from a new earth-inspired clinker
AssigneeThe Board of Trustees of the Leland Stanford Junior University
InventorTiziana Vanorio
Life of this patent
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Abstract
Improved cement for concrete is provided having reduced carbon footprint and improved mechanical properties. A limestone-free process of making the clinker provides a 70% reduction of carbon footprint vs. conventional manufacture of Portland cement. Curing the resulting cement in a temperature range from 80° C. to 100° C. advantageously enhances growth of fibrous minerals in the concrete.
Claims3
A method of making a clinker for use in cement production, the method comprising:
- providing raw meal including silica, aluminum oxide, alkali oxides, calcium oxide and sulfur oxide;
- wherein a weight fraction of silica in the raw meal is between 40% and 60%;
- wherein a weight fraction of the aluminum oxide in the raw meal is between 10% and 25%;
- wherein a weight fraction of the alkali metal oxides in the raw meal is between 5% and 15%;
- wherein a weight fraction of the calcium oxide in the raw meal is between 5% and 15%;
- wherein a weight fraction of the sulfur oxide in the raw meal is between 0.5% and 2%;
- wherein a weight fraction of carbon-containing chemical species in the raw meal is less than 1%;
- firing the raw meal to provide the clinker.
5 more elements
Dependencies are inferred from the claim text.