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 language | English |
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Pages (from-to) | 37-46 |
Number of pages | 10 |
Journal | Construction and Building Materials |
Volume | 67 |
DOIs | |
Publication status | Published - 2014 |
Externally published | Yes |
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)