Analysis of cracking in high-strength cementitious materials under heating and re-curing using X-ray CT

Michael Henry, Ivan Sandi Darma, Yuto Haraguchi, Takafumi Sugiyama

研究成果: Conference article査読

4 被引用数 (Scopus)

抄録

The healing of cracks formed during high temperature exposure plays an important role in the performance recovery of concrete damaged by fire, but it is necessary to better understand the cracking behavior under heating and re-curing. This research applied X-ray microtomography and image analysis techniques to non-destructively examine the internal microstructure of high-strength cementitious materials and to clarify the changes in crack characteristics due to heating and water re-curing. Results showed that, in cement paste, radial cracks formed during heating due to shrinkage by dehydration and these cracks grew larger and new cracks formed during re-curing due to expansion by rehydration. In concrete, cracks formed around aggregates due to incapability in thermal expansion, but water re-curing reduced the total crack space. Better crack recovery in concrete relative to cement paste may be due to the lower cement content and the restraining effect of aggregates.

本文言語English
論文番号e362
ジャーナルSustainable Construction Materials and Technologies
2013-August
出版ステータスPublished - 2013
外部発表はい
イベント3rd International Conference on Sustainable Construction Materials and Technologies, SCMT 2013 - Kyoto, Japan
継続期間: 2013 8 182013 8 21

ASJC Scopus subject areas

  • 土木構造工学
  • 建築および建設
  • 材料力学
  • 材料科学(全般)

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