Activation of blast furnace slag by ettringite formation
0
조회
0
다운로드
1
인용
0
참고문헌
키워드
초록
Blast furnace slag (BFS) can be characterized by latent hydraulic reactivity, with low early strength caused by a hydrationdelay. When BFS mixes with water, aluminosilicate glass is formed on the surface of the BFS. The aluminosilicate glassdisturbs the ordinary hydration of BFS. Therefore, to activate the hydration of BFS, activator materials are usually added tothe BFS. To break up the aluminosilicate glass layer and activate hydration, ettringite can be formed on the surface of the slag- the formation of ettringite was the focus of this study. The heat of hydration of the hardened blast furnace slag is less thanhalf of that of Ordinary Portland Cement (OPC); however, the formed ettringite contributes greatly to initiating BFShydration, and hardened BFS formed by this method exhibited compressive strengths of 83%, 58% and 54% of that of OPC,after 28 days. Properties of the hardened blast furnace slag were characterized by the heat of hydration and X-ray diffractionanalysis of the hydrates.
Abstract
Blast furnace slag (BFS) can be characterized by latent hydraulic reactivity, with low early strength caused by a hydrationdelay. When BFS mixes with water, aluminosilicate glass is formed on the surface of the BFS. The aluminosilicate glassdisturbs the ordinary hydration of BFS. Therefore, to activate the hydration of BFS, activator materials are usually added tothe BFS. To break up the aluminosilicate glass layer and activate hydration, ettringite can be formed on the surface of the slag- the formation of ettringite was the focus of this study. The heat of hydration of the hardened blast furnace slag is less thanhalf of that of Ordinary Portland Cement (OPC); however, the formed ettringite contributes greatly to initiating BFShydration, and hardened BFS formed by this method exhibited compressive strengths of 83%, 58% and 54% of that of OPC,after 28 days. Properties of the hardened blast furnace slag were characterized by the heat of hydration and X-ray diffractionanalysis of the hydrates.
참고문헌 (11)
- C.W. Park, , Maga. Korea Concr. Ins., 20(6), pp.24~26 (2008)
- S.H. Lee, , Maga. Korea Concr. Ins., 24(6), pp.31~34 (2012)
- F. Collins, , Cem. Concr. Res., 29, pp.607~610 (1999)[DOI]
- F. Bellmann, , Cem. Concr. Res., 39, pp.644~650 (2009)[DOI]
- J.I. Escalante-Garcia, , Constr. Build. Mater., 66, pp.323~328 (2014)[DOI]
- K.J. Mun, , Constr. Build. Mater., 21, pp.1576~1582 (2007)[DOI]
- K. Arbi, , Ceram. Int., 39, pp.9237~9245 (2013)[DOI]
- F. Winnefeld, , Cem. Concr. Res., 40, pp.1239~1247 (2010)[DOI]
- H. Sakamoto, , J. Nuclear Fuel Cycle and Environ., 5(2), pp.37~42 (1999)[DOI]
- M.S. Kim, , Cem. Concr. Res., 54, pp.208~214 (2013)[DOI]
- P. Duxson, , J. Am. Ceram. Soc., 91(12), pp.3864~3869 (2008)[DOI]