Use of gasification residues in compacted concrete paving blocks

Erika Holt (Corresponding Author), Paula Raivio

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Research was done to determine the possible uses of fine-grained solid gasification residues in concrete products. Due to the residues' chemical composition, compacted concrete paving blocks were studied as one viable non-structural application of adding the residue. Six different residues were tested in the laboratory at up to 25% replacement by dry weight of either cement or aggregate. After these preliminary laboratory tests, one residue was used in full-scale field tests at the Lakan Betoni factory where 10 and 15% of straw-derived residue was used as a cement replacement. Tensile strength, compressive strength, resistance to freezing–thawing cycles, absorption and leaching were evaluated. The addition of the residue improved the workability of the concrete, provided a beneficial dark coloring and did not adversely affect most properties. The freeze–thaw resistance should be improved by reducing the factory compaction effort to ensure sufficient void space.
Original languageEnglish
Pages (from-to)441-448
Number of pages8
JournalCement and Concrete Research
Volume36
Issue number3
DOIs
Publication statusPublished - 2006
MoE publication typeA1 Journal article-refereed

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Keywords

  • mixture proportioning
  • admixtures
  • ash
  • gasification

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