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Thermoporometry and Proton NMR Measurement on Cement Paste Equilibrated at Different Relative Humidities

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Title: Thermoporometry and Proton NMR Measurement on Cement Paste Equilibrated at Different Relative Humidities
Authors: Kurumisawa, Kiyofumi Browse this author →KAKEN DB
Jensen, Ole Mejlhede Browse this author
Issue Date: Aug-2020
Publisher: Japan Concrete Institute
Journal Title: Journal of advanced concrete technology
Volume: 18
Issue: 8
Start Page: 456
End Page: 462
Publisher DOI: 10.3151/jact.18.456
Abstract: In this study, thermoporometry by differential scanning calorimetry and proton NMR measurements of hardened cement paste equilibrated under different humidity conditions were carried out, and the results of both measurements were compared. The results reveal that thermoporometry by low temperature DSC measurement cannot detect the water present in samples equilibrated at low relative humidity. On the other hand, it is possible to detect a signal at low relative humidity by proton NMR measurement. It is clarified that water strongly bound to the surface, which cannot be detected by low temperature DSC, exists at a relative humidity of 33% or less. If it is relevant to detect tightly held water, such as water present in the fine gel pores, it is recommended to apply proton NMR measurements. This paper is an extended English version of the authors' previous work [Kummisawa, K. and Jensen, O. M., (2020). "Measurement of cement paste at different humidities by thermoporometry and proton NMR." Proceedings of the Japan Concrete Institute, 42, 347-352. (in Japanese)].
Type: article
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)

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