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Journal of Materials Science

, Volume 42, Issue 19, pp 8236–8241 | Cite as

Hydrothermal solidification of blast furnace slag by formation of tobermorite

  • Zhenzi JingEmail author
  • F. Jin
  • T. Hashida
  • N. Yamasaki
  • H. Ishida
Interface Science

Abstract

Blast furnace water-cooled slag (BFWS) has been solidified using a hydrothermal processing method, in which the BFWS could be solidified in an autoclave under saturated steam pressure (1.56 MPa) at 200 °C for 12 h by the additions of quartz or coal flyash. The tensile strength development was shown to depend on the formation of tobermorite and the packing state of the formed tobermorite in the solidified bodies. The additions of quartz or fly ash were proved to be favorable not only to the formation of tobermorite but also to the transformation of hibschite, the former improving the strength, and the latter deteriorating the strength. The excessive addition of quartz appeared to cause strength deterioration due to the fact that the residual quartz affected the formation of tobermorite in the solidified bodies.

Keywords

Flyash Portland Cement Blast Furnace Slag Calcium Silicate Hydrate Strength Development 

Notes

Acknowledgements

The work reported hear was partially supported by the Iron and Steel Institute of Japan under Grant of 45310244.

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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Zhenzi Jing
    • 1
    Email author
  • F. Jin
    • 2
  • T. Hashida
    • 3
  • N. Yamasaki
    • 1
  • H. Ishida
    • 1
  1. 1.Graduate School of Environmental StudiesTohoku UniversityAoba-kuJapan
  2. 2.School of Environmental Science and EngineeringTongji UniversityShanghaiChina
  3. 3.Fracture and Reliability Research InstituteTohoku UniversityAoba-kuJapan

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