Cracking and Chemical Composition of Cement Paste Subjected to Heating and Water Re-Curing

Henry, Michael; Hashimoto, Katsufumi; Darma, Ivan Sandi; Sugiyama, Takafumi

Cracking and Chemical Composition of Cement Paste Subjected to Heating and Water Re-Curing

Henry, Michael; Hashimoto, Katsufumi; Darma, Ivan Sandi et al.

Journal of advanced concrete technology, 2016, 14(4), 134-143

Permalink : https://hdl.handle.net/2115/63007

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アクセス権	open access
URI	https://hdl.handle.net/2115/63007
タイトル	Cracking and Chemical Composition of Cement Paste Subjected to Heating and Water Re-Curing
著者	Henry, Michael ; Hashimoto, Katsufumi ; Darma, Ivan Sandi ; Sugiyama, Takafumi
著者名 Henry, Michael
著者名 Hashimoto, Katsufumi
著者名 Darma, Ivan Sandi
e-Rad_Researcher 70261865 著者名 Sugiyama, Takafumi
言語	英語
発行日	2016-04
出版者	Japan Concrete Institute
収録物名	Journal of advanced concrete technology
巻(号)	14(4)
ページ	134-143
抄録	Water re-curing of fire-damaged concrete may reduce the environmental and economic impacts of repair operations by re-using the existing concrete. To clarify the rehydration mechanism, the effects of water re-curing on the microstructure and chemical properties of fire-damaged cement paste were examined. Analysis by X-ray CT showed that heating led to radial cracks that propagated horizontally and vertically in the cement paste specimen. Water supply led to a growth in the cracked space through an increase in the connectivity of the crack network. This growth may be due to expansion caused by the rehydration of CaO into Ca(OH)(2). Chemical analyses suggest that the rehydration reaction differs from the initial hydration in that C2S plays a greater role in generating C-S-H gel during the earlier period of water re-curing.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
権利情報	Creative Commons Attribution 2.0 Generic
PISSN	1346-8014
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.3151/jact.14.134