CEMENT ADDITIVE

CEMENT ADDITIVE

PROBLEM TO BE SOLVED: To provide a cement additive which has good storage stability and a reactivity similar to that of an immaculate alkali metal carbonate without encapsulation after kneading.SOLUTION: (1) A cement additive consists of an alkali metal carbonate, or the core material, encapsulated...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: OTSUKA TETSUO, MORIOKA MINORU, MIYAGUCHI KATSUICHI, MORI TAIICHIRO, KANEKO TAKAYUKI, YAGI TORU
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
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Beschreibung
Zusammenfassung:PROBLEM TO BE SOLVED: To provide a cement additive which has good storage stability and a reactivity similar to that of an immaculate alkali metal carbonate without encapsulation after kneading.SOLUTION: (1) A cement additive consists of an alkali metal carbonate, or the core material, encapsulated with a capsule wall material, and the content of the core material is 90-99.5 pts. mass to the total of the core material and the capsule wall material of 100 pts. mass. (2) In the cement additive specified by (1), the capsule wall material is one or more selected from waxes, hardened oils, paraffin and soft resins. (3) In the cement additive specified by (1) and (2), the alkali metal carbonate is one or more selected from sodium carbonate, potassium carbonate and lithium carbonate. 【課題】貯蔵安定性が良好で、しかも、練り混ぜた後は、カプセル化していない無垢のアルカリ金属の炭酸塩と同様の反応性を有するセメント添加剤を提供する。【解決手段】（１）芯物質であるアルカリ金属の炭酸塩を、カプセル壁材でカプセル化してなり、芯物質が、芯物質とカプセル壁材の合計１００質量部中、９０〜９９．５質量部であるセメント添加剤、（２）カプセル壁材が、ろう、硬化油、パラフィン、軟性樹脂の中から選ばれる１種又は２種以上である（１）のセメント添加剤、（３）アルカリ金属の炭酸塩が、炭酸ナトリウム、炭酸カリウム、炭酸リチウムの中から選ばれる１種又は２種以上である（１）又は（２）のセメント添加剤、である。【選択図】なし