A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
To provide spray concrete having excellent initial strength, mid and long term strength, fast curing capability necessary for exhibiting excellent adhesion upon being sprayed, and a suitable fluidity.SOLUTION: The spray concrete comprises portland cement, fly ash, an accelerator of a calcium aluminate (CA) type, anhydrous gypsum, an aluminate and a carbonate of an alkali-metal, and aggregate, with the accelerator being (A) or (B). (A) is an accelerator of a CA (calcium aluminate) type comprising 80 to 96 mass% of amorphous CA with the molar ratio of CaO and AlOtherein being 1.8 to and 2.4, and 4 to 20 mass% of crystalline CA comprising 0.1 to 1.5 mass% of water with the molar ratio of CaO and AlOtherein being 1.0 to 1.4. (B) is an accelerator of a CA type comprising 80 to 96 mass% of amorphous CA with the molar ratio of CaO and AlOtherein being 1.8 to 2.4, 3 to 15 mass% of crystalline CA with the molar ratio of CaO and AlOtherein being 1.0 to 1.4, and 1 to 4 mass% of crystalline CA comprising 0.1 to 1.5 mass% of water with the molar ratio of CaO and AlOtherein being 1.0 to 1.4.SELECTED DRAWING: None
【課題】初期強度と中長期強度、吹付時に優れた付着性に必要な急結性、適度の流動性可能な吹付コンクリートを提供する。【解決手段】ポルトランドセメント、フライアッシュ、カルシウムアルミネート（ＣＡ）系急結剤、無水石膏、アルカリ金属のアルミン酸塩と炭酸塩および骨材を含有する吹付コンクリートであって、急結剤が、（Ａ）又は（Ｂ）である吹付コンクリート。（Ａ）ＣａＯとＡｌ２Ｏ３のモル比が１．８〜２．４の非晶質ＣＡ８０〜９６質量％と、０．１〜１．５質量％の水を含有し、ＣａＯとＡｌ２Ｏ３の含有モル比が１．０〜１．４の結晶質ＣＡ４〜２０質量％。（Ｂ）ＣａＯとＡｌ２Ｏ３のモル比が１．８〜２．４の非晶質ＣＡ８０〜９６質量％と、ＣａＯとＡｌ２Ｏ３のモル比が１．０〜１．４の結晶質ＣＡ３〜１５質量％と、０．１〜１．５質量％の水を含有し、ＣａＯとＡｌ２Ｏ３のモル比が１．０〜１．４の結晶質ＣＡ１〜４質量％。【選択図】なし
To provide spray concrete having excellent initial strength, mid and long term strength, fast curing capability necessary for exhibiting excellent adhesion upon being sprayed, and a suitable fluidity.SOLUTION: The spray concrete comprises portland cement, fly ash, an accelerator of a calcium aluminate (CA) type, anhydrous gypsum, an aluminate and a carbonate of an alkali-metal, and aggregate, with the accelerator being (A) or (B). (A) is an accelerator of a CA (calcium aluminate) type comprising 80 to 96 mass% of amorphous CA with the molar ratio of CaO and AlOtherein being 1.8 to and 2.4, and 4 to 20 mass% of crystalline CA comprising 0.1 to 1.5 mass% of water with the molar ratio of CaO and AlOtherein being 1.0 to 1.4. (B) is an accelerator of a CA type comprising 80 to 96 mass% of amorphous CA with the molar ratio of CaO and AlOtherein being 1.8 to 2.4, 3 to 15 mass% of crystalline CA with the molar ratio of CaO and AlOtherein being 1.0 to 1.4, and 1 to 4 mass% of crystalline CA comprising 0.1 to 1.5 mass% of water with the molar ratio of CaO and AlOtherein being 1.0 to 1.4.SELECTED DRAWING: None
【課題】初期強度と中長期強度、吹付時に優れた付着性に必要な急結性、適度の流動性可能な吹付コンクリートを提供する。【解決手段】ポルトランドセメント、フライアッシュ、カルシウムアルミネート（ＣＡ）系急結剤、無水石膏、アルカリ金属のアルミン酸塩と炭酸塩および骨材を含有する吹付コンクリートであって、急結剤が、（Ａ）又は（Ｂ）である吹付コンクリート。（Ａ）ＣａＯとＡｌ２Ｏ３のモル比が１．８〜２．４の非晶質ＣＡ８０〜９６質量％と、０．１〜１．５質量％の水を含有し、ＣａＯとＡｌ２Ｏ３の含有モル比が１．０〜１．４の結晶質ＣＡ４〜２０質量％。（Ｂ）ＣａＯとＡｌ２Ｏ３のモル比が１．８〜２．４の非晶質ＣＡ８０〜９６質量％と、ＣａＯとＡｌ２Ｏ３のモル比が１．０〜１．４の結晶質ＣＡ３〜１５質量％と、０．１〜１．５質量％の水を含有し、ＣａＯとＡｌ２Ｏ３のモル比が１．０〜１．４の結晶質ＣＡ１〜４質量％。【選択図】なし
SPRAY CONCRETE
吹付コンクリート
HANEI YOSHIHISA (author)
2019-01-17
Patent
Electronic Resource
Japanese