ADMIXTURE FOR CEMENT COMPOSITION HIGHLY CONTAINING COAL ASH POWDER, CEMENT COMPOSITION HIGHLY CONTAINING COAL ASH POWDER AND CONTAINING THE ADMIXTURE, AND SPRAYING MATERIAL

• Main Authors: SUGIYAMA AKINORI, MOHOGUCHI TAKESHI
• Format: Patent
• Language: English
• Published: 07.08.2008
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; LIME, MAGNESIA; METALLURGY; REFRACTORIES; SLAG; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TREATMENT OF NATURAL STONE

PROBLEM TO BE SOLVED: To provide a cement composition highly containing a coal ash powder and having an initial strength equivalent to or higher than that of a cement composition not containing a coal ash powder. SOLUTION: An admixture used for the cement composition highly containing a coal ash powder contains plaster and an ettringite-based quick-hardening agent in a molar ratio SO3/Al2O3of SO3in the plaster to Al2O3in the ettringite-based quick-hardening agent of 1.5 or higher. The cement composition contains the admixture, and a spraying material containing the composition is also provided. COPYRIGHT: (C)2008,JPO&INPIT