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Deteriorated hardened cement paste structure analyzed by XPS and 29Si NMR techniques

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Title: Deteriorated hardened cement paste structure analyzed by XPS and 29Si NMR techniques
Authors: Kurumisawa, Kiyofumi Browse this author →KAKEN DB
Nawa, Toyoharu Browse this author →KAKEN DB
Owada, Hitoshi Browse this author
Shibata, Masahito Browse this author
Keywords: Calcium-Silicate-Hydrate (C-S-H) (B)
Characterization (B)
Spectroscopy (B)
Degradation (C)
Long-Term Performance (C)
Issue Date: Oct-2013
Publisher: Elsevier
Journal Title: Cement and concrete research
Volume: 52
Issue: 10
Start Page: 190
End Page: 195
Publisher DOI: 10.1016/j.cemconres.2013.07.003
Abstract: In this report, X-ray photoelectron spectroscopy (XPS) and 29Si-MAS-NMR was used for the evaluation of deteriorated hardened cement pastes. The deterioration by ammonium nitrate solution was accompanied by changes in the pore structure as well as by structural changes in the C–S–H in the hardened cement paste. The CaO/SiO2 ratio of the C–S–H decreased with the progress of deterioration, there was also polymerization of the silicate in the C–S–H. It was confirmed that the degree of polymerization of silicate of the C–S–H in hardened cement paste can be determined by XPS. It was also shown that the polymerization depends on the structure of the C–S–H.
Type: article (author version)
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 胡桃澤 清文

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