Fire Separation Cement Composition for Underwater Construction and Manufacturing Method of Activated Slag Fine Powder

摘要

The present invention relates to 25 to 67 parts by weight of activated slag fine powder having a powder content of 4,000 to 5,000 cm 2 / g and 100 parts by weight of a mixture of cement and activated slag fine powder with respect to 100 parts by weight of cement. For underwater construction, a mixture of 1.5 to 1.5 parts by weight, 0.5 to 3.0 parts by weight of a high-melting agent mainly composed of at least one of melamine sulfonic acid geena triacin compounds, and 8 to 20 parts by weight of an antifoaming agent based on 100 parts by weight of a cellulose-ether-based thickener It is an unseparated cement composition, and the fine slag powder is mixed with 100 parts by weight of water to 4 to 10 parts by weight of sodium hydroxide and 3 to 7 parts by weight of Ⅲ anhydrous gypsum and 30 to 30 parts by weight of granular blast furnace slag before grinding. 40 parts by weight are mixed, stirred, aged, dried and ground to prepare.;The composition according to the present invention is excellent in strength expression characteristics and workability and seawater resistance in the early and late, and can be expected to reduce the heat of hydration is suitable for manufacturing underwater cement concrete structures.