Influence of tobermorite formation on mechanical properties of hydrothermally solidified blast furnace slag

Zhenzi Jing, F. Jin, T. Hashida, N. Yamasaki, Emile H. Ishida

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

A hydrothermal processing method has been used to solidify blast furnace water-cooled slag (BFWS), 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 fly ash. The experimental results showed that the addition of the quartz or fly ash was favorable to the formation of tobermorite, and the tobermorite formation in turn exerted a signifiant influence on tensile strength. The strength development depended on both tobermorite formation and the density of the tobermorite formed. 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 specimens. Fly ash could be used as an additive for the hydrothermal solidification of BFWS, which may offer both energy saving and cost reduction.

Original languageEnglish
Pages (from-to)2356-2361
Number of pages6
JournalJournal of Materials Science
Volume43
Issue number7
DOIs
Publication statusPublished - 2008 Apr 1

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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