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Journal of Materials Science

, Volume 42, Issue 9, pp 2953–2957 | Cite as

Dissolution properties of some fly ash fillers applying to geopolymeric materials in alkali solution

  • Akira MikuniEmail author
  • Ryuichi Komatsu
  • Ko Ikeda
Advances in Geopolymer Science & Technology

Abstract:

Dissolution properties of three kinds of fly ash including a Pressurized Fluidized Bed Combustion (PFBC) ash from a novel type of fluidized bed combustion boiler have been studied by leaching in different concentrations of caustic soda solution up to 15 N at 25 °C and 80 °C, stirring for 1 h with liquor/solid ratio = 10. Liquors sampled by a centrifugal separator were chemically analyzed by ICP technique. A blast furnace slag was also studied for reference. Results showed that Ca2+ dissolved relatively large amount in genuine water, but no marked dissolution was detected with increasing NaOH concentrations of the leaching solution. No enhanced dissolution of Al3+ was detected for ordinary fly ashes collected from pulverized coal combustion boilers even with increasing concentrations of solution at 25 °C, whereas enhanced dissolution of Al3+ was observed at 80 °C, when 5 N was reached and more. On the contrary, appreciable increasing was noted on the dissolution of Si4+ with increasing NaOH concentrations even at 25 °C for the ordinary fly ashes and the Si4+ dissolution became enhanced at 80 °C, specifically in 5 N and more.

Keywords

Geopolymer Blast Furnace Slag High Dissolution Granulate Blast Furnace Slag Dissolution Property 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  1. 1.Yamaguchi Prefectural Industrial Technology InstituteAsutopiaJapan
  2. 2.Department of Advanced Materials Science and EngineeringYamaguchi UniversityUbeJapan

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