CaO-Al 2 O 3 based clinker, cement admixture using the same, cement composition, and manufacturing method thereof

摘要

PROBLEM TO BE SOLVED: To provide a CaO-AlO-based clinker which allows securing sufficient super quick hardening property and pot life even when stored long time, and to provide a cement admixture and a cement composition using the same, and a method for producing the same.SOLUTION: The CaO-AlO-based clinker is formed by carbonation in a high temperature atmosphere of 200 to 800°C and comprises 29.9 to 65% of CaO, 34.9 to 70% of AlO, and 0.1 to 5% of carbonic acid component as CO. The cement admixture comprises the clinker, having 25 to 200 parts of gypsum blended into 100 parts of the clinker. The cement composition comprises cement and the cement admixture. The method of producing the CaO-AlO-based clinker containing the carbonic acid component comprises contacting a CaO-AlO-based clinker with carbon dioxide in a high temperature atmosphere of 200 to 800°C.