A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
EXPANSIVE MATERIAL-CONTAINING CONCRETE
To provide an expansive material-containing concrete, capable of obtaining an expansion strain within a range for shrinkage compensation, achieving rapid setting time and achieving small degradation in hardness, despite a large amount of fly ash contained.SOLUTION: This invention relates to an expansive material-containing concrete, comprising: a fly ash in a mixing rate of 20 to 30 mass%; and a lime-based expansive material having a Blaine specific surface area of 4,500 cm2/g or more, in a mixing amount of 15 to 22 kg per 1 m3 of concrete. The expansive material-containing concrete further comprises at least the cement, a fine aggregate, a coarse aggregate, an additive, and water.SELECTED DRAWING: None
【課題】本発明は、フライアッシュを多量に含むにも拘わらず、収縮補償の範囲内で膨張ひずみが得られ、凝結時間が早まり、また、強度の低下が小さい、膨張材含有コンクリートを提供する。【解決手段】本発明は、フライアッシュの混和率が２０〜３０質量％、ブレーン比表面積が４５００ｃｍ２／ｇ以上の石灰系膨張材の混和量がコンクリート１ｍ３あたり１５〜２２ｋｇであり、さらに、セメント、細骨材、粗骨材、混和剤、および水を少なくとも含む、膨張材含有コンクリートである。【選択図】なし
EXPANSIVE MATERIAL-CONTAINING CONCRETE
To provide an expansive material-containing concrete, capable of obtaining an expansion strain within a range for shrinkage compensation, achieving rapid setting time and achieving small degradation in hardness, despite a large amount of fly ash contained.SOLUTION: This invention relates to an expansive material-containing concrete, comprising: a fly ash in a mixing rate of 20 to 30 mass%; and a lime-based expansive material having a Blaine specific surface area of 4,500 cm2/g or more, in a mixing amount of 15 to 22 kg per 1 m3 of concrete. The expansive material-containing concrete further comprises at least the cement, a fine aggregate, a coarse aggregate, an additive, and water.SELECTED DRAWING: None
【課題】本発明は、フライアッシュを多量に含むにも拘わらず、収縮補償の範囲内で膨張ひずみが得られ、凝結時間が早まり、また、強度の低下が小さい、膨張材含有コンクリートを提供する。【解決手段】本発明は、フライアッシュの混和率が２０〜３０質量％、ブレーン比表面積が４５００ｃｍ２／ｇ以上の石灰系膨張材の混和量がコンクリート１ｍ３あたり１５〜２２ｋｇであり、さらに、セメント、細骨材、粗骨材、混和剤、および水を少なくとも含む、膨張材含有コンクリートである。【選択図】なし
EXPANSIVE MATERIAL-CONTAINING CONCRETE
膨張材含有コンクリート
NAGASHIO SEISUKE (author)
2021-10-07
Patent
Electronic Resource
Japanese
IPC:
C04B
Kalk
,
LIME
| Engineering Index Backfile | 1965
Preparation method of expansive concrete containing steel slag
| European Patent Office | 2015