CEMENT ADDITIVE AND CEMENT COMPOSITION

To provide a cement additive excellent in flowability and strength developability of a cement composition containing a coal ash, even if the cement composition contains the coal ash that does not conform to "JIS A 6201:2015 (fly ash for use in concrete)", the standard for fly ashes I-IV.SO...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	HIRAO HIROSHI, HOSHINO SEIICHI, KUBOTA OSAMU, AKI TOMOKO
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	ARTIFICIAL STONE CEMENTS CERAMICS CHEMISTRY COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE LIME, MAGNESIA METALLURGY REFRACTORIES SLAG TREATMENT OF NATURAL STONE
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	To provide a cement additive excellent in flowability and strength developability of a cement composition containing a coal ash, even if the cement composition contains the coal ash that does not conform to "JIS A 6201:2015 (fly ash for use in concrete)", the standard for fly ashes I-IV.SOLUTION: This invention relates to a cement additive, comprising: 100 pts.mass of a coal ash that does not conform to "JIS A 6201:2015 (fly ash for use in concrete)", the standard for fly ashes I-IV; and 15-400 pts.mass of a coal gasification slag-ground product having a Blaine's specific surface area of 3,000-10,000 cm/g, wherein the content ratio of CaO in the slag-ground product is 11.0-23.0% by mass, and the ignition loss of the cement additive is 5.0% by mass or lower.SELECTED DRAWING: None 【課題】「ＪＩＳＡ６２０１：２０１５（コンクリート用フライアッシュ）」のフライアッシュＩ〜ＩＶ種の規定のいずれにも適合しない石炭灰を含むにもかかわらず、該石炭灰を含むセメント組成物の流動性や強度発現性が良好なセメント添加材を提供する。【解決手段】「ＪＩＳＡ６２０１：２０１５（コンクリート用フライアッシュ）」のフライアッシュＩ〜ＩＶ種の規定のいずれにも適合しない石炭灰１００質量部、および、ブレーン比表面積が３，０００〜１０，０００ｃｍ２／ｇである石炭ガス化スラグ粉砕物１５〜４００質量部を含むセメント添加材であって、石炭ガス化スラグ粉砕物中、ＣａＯの含有率が１１．０〜２３．０質量％であり、かつ、セメント添加材の強熱減量が５．０質量％以下であるセメント添加材。【選択図】なし