Cement clinker, cement composition, method for producing cement clinker, and method for treatment of waste containing alkali component
AssigneeSumitomo Osaka Cement Co., Ltd.
InventorsTatsuo Ikabata, Tatsushi Akiyama, Kazuhiro Kano
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Abstract
Cement clinker, characterized in that it comprises Al2O3 and Fe2O3 wherein the mass ratio of Al2O3/Fe2O3 is 0.05-0.62, and alkali components and C2S wherein the content Y (mass %) of alkali components and the content X (mass %) of C2S satisfy the formula: 0.0025X+0.1≦Y≦0.01X+0.8. The production of the clinker allows the incorporation of alkali components into cement with an advantageous effect of enhancement of the hydration of belite and also with suppression of the lowering of flowability, which leads to the reuse of wastes containing alkali components as a cement raw material.
Claims8
A cement clinker comprising Al2O3 and Fe2O3 wherein the mass ratio of Al2O3/Fe2O3 is 0.05-0.62, and alkali components and C2S, wherein the formula 0.0025X+0.1≦Y≦0.01X+0.8 is satisfied, where:
- Y=100×{mass of alkali components/mass of cement clinker}, and
- X=100×{mass of C2S/mass of cement clinker}.
A cement clinker comprising Al2O3 and Fe2O3 wherein the mass ratio of Al2O3/FeO3 is 0.05-0.5, and alkali components and C2S, wherein:
- 0.0025X+0.25≦Y≦0.01X+0.8 when 0.05≦Al2O3/Fe2O3≦0.3, (1)
- and
- 0.0025X+0.25≦Y≦0.01X+0.65 when 0.3≦Al2O3/Fe2O3≦0.5 where:
- (2)
- Y=100×{mass of alkali components/mass of cement clinker}, and
- X=100×{mass of C2S/mass of cement clinker}.
A method for manufacturing cement clinker comprising:
- incorporating Al2O3 and Fe2O3 at the mass ratio of Al2O3 to Fe2O3 being 0.05-0.62,
- incorporating alkali components and C2S wherein the formula 0.0025X+0.1≦Y≦0.01X+0.8 is satisfied, where:
- Y=100×{mass of alkali components/mass of cement clinker}, and
- X=100×{mass of C2S/mass of cement clinker}, and firing the resultant.
A method for treatment of waste containing alkali components comprising:
- incorporating as a cement raw material waste containing alkali components at the mass ratio of Al2O3/Fe2O3 being 0.05 to 0.62,
- incorporating alkali components and C2S, wherein the formula 0.0025X+0.1≦Y≦0.01X+0.8 is satisfied, where:
- Y=100×{mass of alkali components/mass of cement clinker}, and
- X=100×{mass of C2S/mass of cement clinker},
- mixing the cement raw material waste, alkali components and C2S, and
- firing the resultant.
Dependencies are inferred from the claim text.