Evaluation of Relationship between Innitial Current, Conductance, Chloride Diffusion Coefficient and Charge Passed of Concrete

Abstract:

In this study, plain and mineral admixture (slag, fly ash and silica fume) modified concrete prisms were made with three water-to-binder ratios (w/b), and four test methods (Rapid Chloride Permeability Test-ASTM C1202-91, AC Conductance Test, 150-days Ponding Test, Alternate Wetting and Drying Test by cyclic loading with salt solution and drying) were employed to measure the concrete prisms’ chloride penetrability. The effects of mineral admixtures on the concrete chloride permeability were discussed, and the correlation of results separately obtained from the four test methods were analyzed. The experiment results indicate that blending concrete is beneficial with regard to the resistance against chloride ion penetration, and good linear ralationship between charge passed and innitial current, charge passed and conductance, charge passed and chloride diffusion coefficients by 150-days Ponding Test, charge passed and diffusion coefficients by Alternate Wetting and Drying Test were obtained.

• Periodical: Advanced Materials Research (Volumes 399-401)
• Pages: 1200-1203
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.399-401.1200
• Online since: November 2011
• Authors: Yan Jun Hu, Yan Liang Du, Wei Zhang
• Keywords: Chloride Permeability Test, Concrete, Linear Fit, Mineral Admixture

References

[1] ASTM C1202, Electrical indication of concrete's ability to resist chloride ion penetration, Annual Book of American Society for Testing Materials Standards, vol. C04.02(2000).

[2] Erhan Güneyisi, Turan Özturan, Mehmet Gesog˘lu, Examining the electrical properties of plain and blended cement concretes: Relationship between charge passed and initial current, Composites: Part B 42 (2011) 1517–1524.

DOI: 10.1016/j.compositesb.2011.04.044

[3] David Whiting, "Rapid Determination of the Chloride Permeability of Concrete," Report No. FHWA/RD-81/119, August 1981, Federal Highway Administration, Office of Research & Development, Washington, DC 20590.