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


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.


Geopolymer Blast Furnace Slag High Dissolution Granulate Blast Furnace Slag Dissolution Property 
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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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