Journal of Korea Society of Waste Management (한국폐기물자원순환학회지)

Korea Society of Waste Management (한국폐기물자원순환학회)
권호 표지

Effects of Admixtures and Modulus of Water Glass on Compressive Strengths of Alkali-Activated Fly Ash Pastes

알칼리-활성 플라이 애쉬 페이스트의 압축강도에 대한 배합조건 및 물유리 모듈의 영향

Park, Sang-Suk;Han, Sang-Ho;Kang, Hwa-Yeong;Im, Yo-Seop;Kim, Dong-Kuk
박상숙;한상호;강화영;임요섭;김동국

  • Published : 20060000
⟨ Previous Next ⟩

Abstract

Compressive strength and microstructural characterization of the pastes prepared using Class F fly ash and water glass and sodium hydroxide solutions were investigated. SEM and NMR were used to observed the microstructural characterization of the pastes in this study. The compressive strength of pastes prepared using Class F fly ash and water glass and sodium hydroxide solutions was depended on the weight of mixed water glass, modulus of SiO2/Na2O and activator/fly ash ratio. Amorphous aluminosilicate gel from the alkali-attacked fly ash and water glass bind the particles of fly ash and giving place to a cementitious matrix, results in high strength of the pastes.

Keywords

References

  1. Cengiz Duran Atis : Strength properties of high-volume fly ash roller compacted and workable concrete, and influence of curing condition, Cement and Concrete Research, Vol. 35, pp. 1112-1121 (2005) https://doi.org/10.1016/j.cemconres.2004.07.037
  2. American society for testing and materials, annual book of ASTM standards, Vol. 04, 01, Cement, Gypsum, Philadelphia (1989)
  3. Qian Jueshi, Shi CaiJun, Wang Zhi : Activation of blended cements containing fly ash, Cement and Concrete Research, Vol. 31, pp. 1121-1127 (2001) https://doi.org/10.1016/S0008-8846(01)00526-9
  4. Oner, A., Akyuz, S. and Yildiz, R. : An experimental study on strength development of concrete containing fly ash and optimum usage of fly ash in concrete, Cement and Concrete Research, Vol. 35, pp. 1165-1171 (2005) https://doi.org/10.1016/j.cemconres.2004.09.031
  5. 박상숙, 강화영, 정정조 : 메타규산나트륨이 첨가된 알칼리 용액으로 활성화된 플라이 애쉬-시멘트의 압축강도 및 다공성, 한국폐기물학회지, Vol. 22, No. 6, pp. 569-576 (2005)
  6. Bakharev, T. : Geopolymeric materials prepared using class F fly ash and elevated temperature curing, Cement and Concrete Research, Vol. 35, pp. 1224-1232 (2005) https://doi.org/10.1016/j.cemconres.2004.06.031
  7. Fernandez-Timenez, A. and Palomo, A. : Alkali-activated fly ashes: Properties and characteristics, proceedings of 11th ICCC 3, pp. 1332-1340 (2000)
  8. Dongxu Li, Yimin Chen, Jinlin Shen, Jiaohua Su, Xuequan Wu : The influence of alkalinity on activation and microstructure of fly ash, Cem Concr Res., Vol. 30, 881-886 (2000) https://doi.org/10.1016/S0008-8846(00)00252-0
  9. Palomo, A., Grutzeck, M. W. and Blanco, M. T. : Alkali-activated fly ashes-A Cement for the furture, Cement and Concrete Research, Vol. 29, 1323-1329 (1999) https://doi.org/10.1016/S0008-8846(98)00243-9
  10. Frenandez-Jimenez, Palomo, A. : Alkali- activated fly ashes: properties and characteristics, 11th International Congress on the Chemistry of Cement Durban, South Africa, pp. 1332-1340 (2003)
  11. Hossein Rostami and William Brendley : Alkali ash material: A novel fly ash-based cement, Environ. Sci. Technol., Vol. 37, pp. 3454-3457 (2003) https://doi.org/10.1021/es026317b
  12. Puertas, F. and Fernandez-Jimenez. A. : Mineralogical and microstructural characterisation of alkali-activated fly ash/slag pastes, Cement and Concrete Research, Vol. 25, pp. 287-292 (2003) https://doi.org/10.1016/S0958-9465(02)00059-8
  13. Zhaohui Xie and Yunping Xi: Hardening mechanism of an alkaline-activated class F fly ash, Cem Concr Res., Vol. 31, pp. 1245-1249 (2001) https://doi.org/10.1016/S0008-8846(01)00571-3
  14. Li, D., Chen, Y., Shen, J., Su, J. and Wu, X. : The influence of alkalinity on activation and microstructure of fly ash, Cem Concr Res., Vol. 30, pp. 881-886 (2000) https://doi.org/10.1016/S0008-8846(00)00252-0
  15. Palomo, A., Alonso, S., Fernandez-Jimenez. A., Sobrados, I. and sanz, J. : Alkaline activation of fly ashes. A 29Si NMR study of the reaction products, J. Am. Ceram. Soc., Vol. 87, No. 6, pp. 1141-1145 (2004) https://doi.org/10.1111/j.1551-2916.2004.01141.x
  16. Gebauer, J. : Alkali in clinker: influence on cement and concrete properties, Proceedings of the 5th International Conference on Alkali-Aggregate Reaction in Concrete, Capetown, South Africa, March 30-April 3, 1981, National Building Research Institute, Pretoria, South Africa, 1981, pp. 1-9, S252/4
  17. Richardson, I. G., Brough, A. R., Groves, G. W. and Dobson, C. M. : The characterization of hardened alkali-activated blast-furnace slag pastes and the nature of the calcium silicate hydrate (C-S-H), Cem Concr Res., Vol. 24, No. 5, pp. 813-829 (1994) https://doi.org/10.1016/0008-8846(94)90002-7