Phase development and mechanical response of low-level cement replacements with wood ash and washed wood ash

Nina M. Sigvardsen*, Mette R. Geiker, Lisbeth M. Ottosen

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

A significant increase is seen worldwide in the amounts of wood ashes (WAs) produced by the heating and power industry. This study investigates the potential utilisation of two different WAs as low-level cement replacements, in an untreated and a washed version. Phase development and mechanical response were investigated. Results indicated ettringite formation mainly to contribute to the strength development until excessive formation. Indications of an optimum SO3/C3A ratio for mixtures with a low-level cement replacement with WA was between 0.4 and 0.5. Washed WA originating from grate combustion appeared to be most promising of the tested WAs in cement-based materials
Original languageEnglish
Article number121234
JournalConstruction and Building Materials
Volume269
Number of pages13
ISSN0950-0618
DOIs
Publication statusPublished - 2021

Keywords

  • Wood ash
  • ow-level cement replacement
  • Phase development
  • Mechanical response
  • Cement-based material

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