Freeze-thaw resistance of pozzolanic hydrated lime mortars

Tugce Busra Su-Cadirci*, Juliana Calabria-Holley, Ceren Ince, Richard J. Ball

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)
1 Downloads (Pure)


Degradation of hydrated lime mortars subjected to freezing and thawing is common in historic building conservation. The pozzolanic additions, Argical M1000, diatomite (diatomaceous earth) and brick dust, were evaluated for their ability to improve performance for up to 720 days. Pozzolanic reactions influenced the pore structure evolution, mechanical performance, and chemical reactivity of the mortar matrix. Argical-lime mortars exhibited a sudden failure, while a gradual reduction in mechanical strength was observed for mortars containing brick dust. A slower rate of failure in diatomite mortars was attributed to pore refinement, which was associated with superior freeze thaw performance. This study has advanced the current state of the art regarding how pore structure affects lime mortars' freeze and thaw resistance. Therefore it provides spesifications on how to optimise mortars for historic masonry. A key impact is the more effective use of lime mortars for conservation, thereby protecting heritage structures from degredation.
Original languageEnglish
Article number131993
JournalConstruction and Building Materials
Early online date16 Jun 2023
Publication statusPublished - 29 Aug 2023


  • Conservation
  • Hydrated lime mortars
  • Lime mortars
  • Pozzolan

ASJC Scopus subject areas

  • Materials Science(all)
  • Building and Construction
  • Civil and Structural Engineering

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