University of Oulu

Bing Zhou, Sanna Komulainen, Juha Vaara, Ville-Veikko Telkki, Characterization of pore structures of hydrated cements and natural shales by 129Xe NMR spectroscopy, Microporous and Mesoporous Materials, Volume 253, 2017, Pages 49-54, ISSN 1387-1811, https://doi.org/10.1016/j.micromeso.2017.06.038. (http://www.sciencedirect.com/science/article/pii/S1387181117304419) Keywords: 129Xe NMR spectroscopy; Cement; Shale; Porous material

Characterization of pore structures of hydrated cements and natural shales by ¹²⁹Xe NMR spectroscopy

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Author: Zhou, Bing1; Komulainen, Sanna2; Vaara, Juha2;
Organizations: 1School of Materials Science and Engineering, Tongji University, Shanghai 210000, China
2NMR Research Unit, University of Oulu, P.O.Box 3000, FIN-90014, Finland
Format: article
Version: published version
Access: embargoed
Persistent link: http://urn.fi/urn:nbn:fi-fe201801152040
Language: English
Published: Elsevier, 2017
Publish Date: 2019-06-20
Description:

Abstract

¹²⁹Xe NMR of adsorbed xenon gas is a sensitive tool for the characterization of porous materials. Here we exploit, for the first time, ¹²⁹Xe NMR to investigate the nanoscale porous structures in hydrated white cements and natural shale. Signals of xenon in mesopores and larger voids are well resolved in the spectra of the cement samples, and the exchange rate between these sites was determined to be 100−300 s−1 at room temperature. The spectra imply that the mesopore size is the smallest and the exchange rate is the highest in the sample with the lowest initial water/cement ratio. The heat of adsorption of xenon in the cements is similar to that in silica gels, about 12 kJ/mol. The shale spectra include a very broad signal, covering a range of about 600 ppm, implying that the adsorbed xenon interacts with the paramagnetic impurities present in the samples.

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Series: Microporous and mesoporous materials
ISSN: 1387-1811
ISSN-E: 1873-3093
ISSN-L: 1387-1811
Volume: 253
Pages: 49 - 54
DOI: 10.1016/j.micromeso.2017.06.038
OADOI: https://oadoi.org/10.1016/j.micromeso.2017.06.038
Type of Publication: A1 Journal article – refereed
Field of Science: 114 Physical sciences
Subjects:
Funding: B.Z. acknowledges financial support from an NSFC Grant No. 41572103. V.-V.T. and J.V. acknowledge the Academy of Finland for financial support (grant numbers 289649, 294027 and 296292).
Academy of Finland Grant Number: 289649
294027
296292
Detailed Information: 289649 (Academy of Finland Funding decision)
294027 (Academy of Finland Funding decision)
296292 (Academy of Finland Funding decision)
Copyright information: © 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
  https://creativecommons.org/licenses/by-nc-nd/4.0/