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Correlating the chloride diffusion coefficient and pore structure of cement-based materials using modified noncontact electrical resistivity measurement
He R.5; Ye H.4; Ma H.2; Fu C.1; Jin X.5; Li Z.3
2019-03-01
Source PublicationJournal of Materials in Civil Engineering
ISSN08991561
Volume31Issue:3
AbstractThe electrical resistivity of hardened cement-based materials was measured in this work by a modified noncontact electrical resistivity measurement (MN-CM). The resistivity was further processed to compute the chloride diffusion coefficient (D ) using the Nernst-Einstein equation. Also, the rapid chloride migration test (RCM) was carried out to obtain the chloride migration coefficient (D ), and the relationship between D and D has been established. The obtained D was further correlated to the pore structure parameters characterized by low-field nuclear magnetic resonance (NMR) spectroscopy. The results show that the D is more sensitive to the change of pore connectivity, while D is more sensitive to the change of porosity. The D is smaller than D since it strictly follows the Nernst-Einstein equation while RCM neglects the other driving forces such as capillary sorption and concentration gradient. It is concluded that the proposed MN-CM can obtain the chloride diffusion coefficient of saturated cement-based materials in a quick, stable, and reliable manner.
KeywordChloride diffusion coefficient Electrical resistivity Formation factor Low-field nuclear magnetic resonance (NMR) Pore structure
DOI10.1061/(ASCE)MT.1943-5533.0002616
URLView the original
Language英語
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Document TypeJournal article
CollectionUniversity of Macau
Affiliation1.Zhejiang University of Technology
2.Missouri University of Science and Technology
3.Universidade de Macau
4.The University of Hong Kong
5.Zhejiang University
Recommended Citation
GB/T 7714
He R.,Ye H.,Ma H.,et al. Correlating the chloride diffusion coefficient and pore structure of cement-based materials using modified noncontact electrical resistivity measurement[J]. Journal of Materials in Civil Engineering,2019,31(3).
APA He R.,Ye H.,Ma H.,Fu C.,Jin X.,&Li Z..(2019).Correlating the chloride diffusion coefficient and pore structure of cement-based materials using modified noncontact electrical resistivity measurement.Journal of Materials in Civil Engineering,31(3).
MLA He R.,et al."Correlating the chloride diffusion coefficient and pore structure of cement-based materials using modified noncontact electrical resistivity measurement".Journal of Materials in Civil Engineering 31.3(2019).
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