Carbonate-bonded construction products from steel-making residues and method for making the same
AssigneeThe Royal Institution for the Advancement of Learning/Mcgill University
InventorsYixin Shao, Mehrdad Mahoutian, Zaid Ghouleh
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Abstract
A building product is made from granular material and a binder that includes steel slag. A process for making the building product includes combining the granular material and the binder and then curing the combined granular material and binder with carbon dioxide. A building material includes a mixture of steel slag and a silica-rich material. The steel slag and silica-rich material is treated by heating. The silica-rich material may be waste glass and/or fly ash. A process for making the building material includes mixing the steel slag and silica-rich material and further heating the mixture.
Claims8
A method for making a construction block, comprising
- providing granular material and a binder consisting of steel slag;
- combining the granular material, the binder with water to a first water-to-slag ratio;
- molding the combined granular material, binder and water;
- reducing the quantity of water in the molded granular material, binder and water to a second water-to-slag ratio that is lower than the first water-to-slag ratio;
- curing said molded granular material, binder and water having said second water-to-slag ratio with carbon dioxide.
Dependencies are inferred from the claim text.