Supercritical carbonation of lime based sustainable structural ceramics

P. Purnell*, E. Farahi, N.R. Short

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

Abstract Structural ceramics were manufactured from industrial byproducts and lime by a compression moulding/vacuum dewatering technique. Treatment of these ceramics with supercritical carbon dioxide was found to both significantly increase their flexural strength and activate cementation in the industrial byproducts at least as efficiently as heat curing. Flexural strengths of up to 10 MPa were achieved. Strength improvements were associated with decreased porosity and conversion of calcium hydroxide to calcium carbonate. Life cycle assessment of proposed products made from such materials indicated that the total reduction in embodied carbon dioxide achieved, as a result of combining use of byproducts with recombination of carbon dioxide, was up to 70%.

Original languageEnglish
Pages (from-to)280-286
Number of pages7
JournalAdvances in Applied Ceramics
Volume109
Issue number5
DOIs
Publication statusPublished - 2010

Keywords

  • byproducts
  • carbonation
  • compression moulding
  • embodied CO
  • flexural strength
  • LCA
  • lime
  • supercritical

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