determination of the transport properties of structural concrete using ac impedance spectroscopy techniques
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ID: 159867
2016
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Abstract
All over the world, particularly in severe environmental conditions, there are reinforced concrete structures that develop nonnegligible phenomena of durability problems. Most of the durability problems are related to hazardous substances invasion. Both engineering practice and scientific studies have revealed that the transport property of near-surface concrete is a main factor in the durability of concrete structures. Among many transport parameters, the chloride ion diffusion coefficient is the most important one, which provides important information on material design and service life prediction. In this paper, AC impedance spectroscopy technology was employed in the measurement of chloride ion diffusion coefficient. The relationship between mesostructure parameters and chloride ion diffusion coefficient was deduced by introducing a reasonable equivalent circuit model. Taking into account the conductivity difference caused by various cementitious material systems, the diffusion coefficient can be corrected, and a diffusion coefficient determination method based on AC impedance spectroscopy technique was established. For the convenience of application, a relationship between the newly proposed method and a widely recognized standard method was obtained. The proposed method can be applied to laboratory testing and establishes the theoretical basis for field tests.
| Reference Key |
wu2016journaldetermination
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|---|---|
| Authors | ;Lipeng Wu;Peng Dai;Yong Li |
| Journal | Plant foods for human nutrition (Dordrecht, Netherlands) |
| Year | 2016 |
| DOI |
10.1155/2016/2630186
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