Journal
CEMENT & CONCRETE COMPOSITES
Volume 72, Issue -, Pages 257-267Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.cemconcomp.2016.06.011
Keywords
Concrete; Chloride ion; Concentration; Convection zone depth; Water influential depth
Funding
- National Natural Science Foundation of China [51408614, 51422814, U1434204, 51278496]
- Project of Innovation-driven Plan in Central South University [2015CXS014]
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Based on the assumption that chloride concentration and water influential depth change linearly in convective zone, the chloride convection zone depth is used in Ficic's diffusion law to investigate the chloride diffusion characteristic of concrete at tidal zones. In this study, an artificial simulation environment and field tests were carried out to validate and calibrate the rationality of the chloride convection zone depth model. The distribution model of surface chloride concentration in concrete was determined by exploring the correlations among chloride concentration, elevation, time and linear distance from seaside. The results illustrated that the depth of chloride convection zone on the concrete surface varied and manifested in terms of a function of water influential depth. The relation between the surface chloride concentration and the linear distance from the seaside followed an S-curve function equation. The similarities and differences regarding the characteristic of chloride diffusion in concrete between experimental and in-situ test were discussed for surface chloride concentration, chloride convection zone depth and chloride diffusion coefficient. (C) 2016 Elsevier Ltd. All rights reserved.
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