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The relationship between chloride diffusion and migration coefficients in concrete

Qiang Yuan UGent, Geert De Schutter UGent, Caijun Shi and Katrien Audenaert UGent (2008) RILEM PROCEEDINGS. 61. p.553-563
abstract
Chloride diffusion coefficient is an indicator of the chloride resistance of concrete and service life prediction of concrete structure subjected to chloride environment. Many methods have been developed to measure the chloride transport in concrete. Based on the driving force, these methods can be classified into diffusion test and migration test. In terms of the change in chloride concentration in concrete, they can be classified into steady-state and non-steady-state testing. However, different methods give different results. This makes the comparison of all these results difficult. In this paper, the relationship between non-steady-state migration test (D-nssm), steady-state migration (D-ssm) test and non-steady-state diffusion (D-nssd) test were investigated. D-nssm was determined by NT build 492, breakthrough time method and the methods proposed by Castellote, respectively. D-ssm was determined by upstream method proposed by Truc and downstream method (NT build 355), respectively. D-nssd was determined according to NT build 443. Four different concretes, containing various mineral admixtures and with water/binder ratio of 0.48, were used for study. A same chloride concentration of 1mol/l, was used for all the tests. The results indicated that all the non-steady-state testing methods gave the same order of the chloride resistance of concretes although the diffusion/migration coefficients were somewhat different. Both NT build 492 and method proposed by Castellote gave a good estimation of diffusion coefficient. Breakthrough time method underestimated chloride diffusion coefficient. Steady-state migration coefficient was one order of magnitude lower than non-steady-state migration coefficients obtained from other methods. Steady-state migration coefficient obtained from upstream method was higher than that obtained from NT build 355.
Please use this url to cite or link to this publication:
author
organization
year
type
conference
publication status
published
subject
keyword
chloride, concrete, diffusion, migration, CEMENT, CONDUCTIVITY, PERMEABILITY, TESTS, STEADY
in
RILEM PROCEEDINGS
RILEM Proc.
editor
W Sun, K van Breugel, C Miao, Guang Ye UGent and H Chen
volume
61
issue title
MICROSTRUCTURE RELATED DURABILITY OF CEMENTITIOUS COMPOSITES, VOLS 1 AND 2
pages
553 - 563
publisher
R I L E M PUBLICATIONS
place of publication
Bagneux, FRANCE
conference name
1st International Conference on Microstructure Related Durability of Cementitious Composites
conference location
Nanjing, PR China
conference start
2008-10-13
conference end
2008-10-15
Web of Science type
Proceedings Paper
Web of Science id
000262079600059
ISBN
978-2-35158-065-3
language
English
UGent publication?
yes
classification
P1
copyright statement
I have transferred the copyright for this publication to the publisher
id
664061
handle
http://hdl.handle.net/1854/LU-664061
date created
2009-05-25 11:16:30
date last changed
2009-06-10 15:15:08
@inproceedings{664061,
  abstract     = {Chloride diffusion coefficient is an indicator of the chloride resistance of concrete and service life prediction of concrete structure subjected to chloride environment. Many methods have been developed to measure the chloride transport in concrete. Based on the driving force, these methods can be classified into diffusion test and migration test. In terms of the change in chloride concentration in concrete, they can be classified into steady-state and non-steady-state testing. However, different methods give different results. This makes the comparison of all these results difficult. In this paper, the relationship between non-steady-state migration test (D-nssm), steady-state migration (D-ssm) test and non-steady-state diffusion (D-nssd) test were investigated. D-nssm was determined by NT build 492, breakthrough time method and the methods proposed by Castellote, respectively. D-ssm was determined by upstream method proposed by Truc and downstream method (NT build 355), respectively. D-nssd was determined according to NT build 443. Four different concretes, containing various mineral admixtures and with water/binder ratio of 0.48, were used for study. A same chloride concentration of 1mol/l, was used for all the tests. The results indicated that all the non-steady-state testing methods gave the same order of the chloride resistance of concretes although the diffusion/migration coefficients were somewhat different. Both NT build 492 and method proposed by Castellote gave a good estimation of diffusion coefficient. Breakthrough time method underestimated chloride diffusion coefficient. Steady-state migration coefficient was one order of magnitude lower than non-steady-state migration coefficients obtained from other methods. Steady-state migration coefficient obtained from upstream method was higher than that obtained from NT build 355.},
  author       = {Yuan, Qiang and De Schutter, Geert and Shi, Caijun and Audenaert, Katrien},
  booktitle    = {RILEM PROCEEDINGS},
  editor       = {Sun, W and van Breugel, K and Miao, C and Ye, Guang and Chen, H},
  isbn         = {978-2-35158-065-3},
  keyword      = {chloride,concrete,diffusion,migration,CEMENT,CONDUCTIVITY,PERMEABILITY,TESTS,STEADY},
  language     = {eng},
  location     = {Nanjing, PR China},
  pages        = {553--563},
  publisher    = {R I L E M PUBLICATIONS},
  title        = {The relationship between chloride diffusion and migration coefficients in concrete},
  volume       = {61},
  year         = {2008},
}

Chicago
Yuan, Qiang, Geert De Schutter, Caijun Shi, and Katrien Audenaert. 2008. “The Relationship Between Chloride Diffusion and Migration Coefficients in Concrete.” In Rilem Proceedings, ed. W Sun, K van Breugel, C Miao, Guang Ye, and H Chen, 61:553–563. Bagneux, FRANCE: R I L E M PUBLICATIONS.
APA
Yuan, Q., De Schutter, G., Shi, C., & Audenaert, K. (2008). The relationship between chloride diffusion and migration coefficients in concrete. In W Sun, K. van Breugel, C. Miao, G. Ye, & H. Chen (Eds.), RILEM PROCEEDINGS (Vol. 61, pp. 553–563). Presented at the 1st International Conference on Microstructure Related Durability of Cementitious Composites, Bagneux, FRANCE: R I L E M PUBLICATIONS.
Vancouver
1.
Yuan Q, De Schutter G, Shi C, Audenaert K. The relationship between chloride diffusion and migration coefficients in concrete. In: Sun W, van Breugel K, Miao C, Ye G, Chen H, editors. RILEM PROCEEDINGS. Bagneux, FRANCE: R I L E M PUBLICATIONS; 2008. p. 553–63.
MLA
Yuan, Qiang, Geert De Schutter, Caijun Shi, et al. “The Relationship Between Chloride Diffusion and Migration Coefficients in Concrete.” Rilem Proceedings. Ed. W Sun et al. Vol. 61. Bagneux, FRANCE: R I L E M PUBLICATIONS, 2008. 553–563. Print.