A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
ADMIXTURE FOR MORTAR AND CONCRETE, CEMENT COMPOSITION, MORTAR COMPOSITION AND CONCRETE COMPOSITION CONTAINING THE SAME, AND METHOD FOR PRODUCING MORTAR CURED PRODUCT AND CONCRETE CURED PRODUCT
To provide an admixture which can obtain a sufficient demolding strength in an early period on a curing condition at a temperature generally applied in steam curing (e.g., at about 50 to 70°C) without applying special cement, and sufficiently reduces an influence on variation with time in flowability of a mortar composition and a concrete composition.SOLUTION: An admixture for a mortar and concrete according to the present invention comprises: at least one gypsum of a hemihydrate gypsum and an anhydrous gypsum; sodium silicate hydrate; and aluminum sulfate. A mass ratio (SiO2/Na2O) of SiO2 and Na2O in the sodium silicate hydrate is 1 or more and 3 or less, and an ignition loss in 100 pts.mass of the sodium silicate hydrate is 5 pts.mass or more and 50 pts.mass or less.SELECTED DRAWING: None
【課題】特殊なセメントを適用しなくても、蒸気養生において一般に適用される温度（例えば、５０〜７０℃程度）の養生条件で早期に十分な脱型強度を得ることができるとともに、モルタル組成物及びコンクリート組成物の流動性の経時変化に及ぼす影響が十分に小さい混和材を提供する。【解決手段】本発明に係るモルタル・コンクリート用混和材は、半水石膏及び無水石膏の少なくとも一方の石膏と、珪酸ナトリウム水和物と、硫酸アルミニウムとを含み、珪酸ナトリウム水和物中のＳｉＯ２とＮａ２Ｏの質量比（ＳｉＯ２／Ｎａ２Ｏ）が１以上３以下であり、且つ珪酸ナトリウム水和物１００質量部の強熱減量が５質量部以上５０質量部以下である。【選択図】なし
ADMIXTURE FOR MORTAR AND CONCRETE, CEMENT COMPOSITION, MORTAR COMPOSITION AND CONCRETE COMPOSITION CONTAINING THE SAME, AND METHOD FOR PRODUCING MORTAR CURED PRODUCT AND CONCRETE CURED PRODUCT
To provide an admixture which can obtain a sufficient demolding strength in an early period on a curing condition at a temperature generally applied in steam curing (e.g., at about 50 to 70°C) without applying special cement, and sufficiently reduces an influence on variation with time in flowability of a mortar composition and a concrete composition.SOLUTION: An admixture for a mortar and concrete according to the present invention comprises: at least one gypsum of a hemihydrate gypsum and an anhydrous gypsum; sodium silicate hydrate; and aluminum sulfate. A mass ratio (SiO2/Na2O) of SiO2 and Na2O in the sodium silicate hydrate is 1 or more and 3 or less, and an ignition loss in 100 pts.mass of the sodium silicate hydrate is 5 pts.mass or more and 50 pts.mass or less.SELECTED DRAWING: None
【課題】特殊なセメントを適用しなくても、蒸気養生において一般に適用される温度（例えば、５０〜７０℃程度）の養生条件で早期に十分な脱型強度を得ることができるとともに、モルタル組成物及びコンクリート組成物の流動性の経時変化に及ぼす影響が十分に小さい混和材を提供する。【解決手段】本発明に係るモルタル・コンクリート用混和材は、半水石膏及び無水石膏の少なくとも一方の石膏と、珪酸ナトリウム水和物と、硫酸アルミニウムとを含み、珪酸ナトリウム水和物中のＳｉＯ２とＮａ２Ｏの質量比（ＳｉＯ２／Ｎａ２Ｏ）が１以上３以下であり、且つ珪酸ナトリウム水和物１００質量部の強熱減量が５質量部以上５０質量部以下である。【選択図】なし
ADMIXTURE FOR MORTAR AND CONCRETE, CEMENT COMPOSITION, MORTAR COMPOSITION AND CONCRETE COMPOSITION CONTAINING THE SAME, AND METHOD FOR PRODUCING MORTAR CURED PRODUCT AND CONCRETE CURED PRODUCT
モルタル・コンクリート用混和材、これを含むセメント組成物、モルタル組成物及びコンクリート組成物、並びに、モルタル硬化物及びコンクリート硬化物の製造方法
NAKAMURA KEIICHIRO (author) / KIRIYAMA HIROKAZU (author) / YOSHIDA KOICHIRO (author) / SATO YOSHIHIDE (author)
2021-07-15
Patent
Electronic Resource
Japanese
IPC:
C04B
Kalk
,
LIME
| European Patent Office | 2023