Analysis of the effect of heating and re-curing on the microstructure of high-strength concrete using X-ray CT

Michael Henry, Ivan Sandi Darma, Takafumi Sugiyama

Research output: Contribution to journalArticle

59 Citations (Scopus)

Abstract

Microstructure recovery plays an important role in restoring the performance of concrete damaged by fire. This research applied X-ray CT and image analysis techniques to non-destructively examine the internal microstructure of high-strength concrete in order to clarify the effects of heating and re-curing on microstructure characteristics. Heating caused an increase in total pore space due to an increase in connectivity caused by the formation of cracks in the mortar-aggregate interface and bridging cracks. Water re-curing, however, was effective in recovering microstructure through the reduction in connected pore space, with most recovery occurring within 7 days.

Original languageEnglish
Pages (from-to)37-46
Number of pages10
JournalConstruction and Building Materials
Volume67
DOIs
Publication statusPublished - 2014
Externally publishedYes

Keywords

  • Connectivity
  • High temperature
  • High-strength concrete
  • Microstructure
  • Non-destructive evaluation
  • Re-curing
  • X-ray CT

ASJC Scopus subject areas

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

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