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AssigneeVito NV
InventorsPeter NIELSEN, Ruben SNELLINGS, Mieke QUAGHEBEUR, Srivastava SUMIT, Pegie COOL
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A method of producing a carbonate bonded article includes preparing a reactive mixture having a particulate mineral source and an aqueous source, and reacting the reactive mixture with carbon dioxide to form a mineral matrix including carbonates. The particulate mineral source includes a leachable compound, the leachable compound including one or more elements selected from: As, Ba, Cd, Cr, Co, Cu, F, Hg, Mo, Mn, Ni, Pb, Sb, Se, V, and Zn. The reactive mixture includes a reducing agent, where the reducing agent includes one or more of a sulfide, disulfide, and polysulfide compound that reacts with the particulate mineral source. The pH of the reactive mixture is at least 10.
A method of producing a carbonate bonded article, the method comprising:
A carbonated article comprising a matrix comprising carbonates, wherein the carbonated article has a pH of at least 10, a compressive strength of at least 5 MPa and a total sulfur content of at least 0.1% by weight, wherein the carbonated article further comprises a leachable element selected from Cr, Mo, As, Ba, Cd, Co, Cu, Hg, Pb, Mn, Ni, Sb, Se, Sn, F, V, and Zn, wherein the carbonated article has a leaching of at least one of the leachable element of 1.0 mg/kg or less on dry matter as determined by a batch leaching test.
Dependencies are inferred from the claim text.