CHLORIDE DIFFUSION IN PARTIALLY SATURATED CEMENTITIOUS MATERIAL

Models for the ingress of chloride into partly saturated concrete are necessary for service life design and for assessment of reinforced concrete structures. This article discusses chloride diffusion in partially saturated cementitious material. The authors propose a combined application of composite theory and Powers' model for microstructural development for the estimation of the diffusion coefficient. The approach is based on the assumption that diffusion in porous material is dependent on the moisture content. The authors report on the use of this method in measurements of chloride diffusion in mortar samples (440 kg/m3 rapid-hardening Portland cement, w/c=0.5, maturity minimum 6 months) stored at 65% and 85% RH, as well as in vacuum-saturated mortar samples. The model takes into account the composition and degree of hydration of the actual cementitious material.

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• Corporate Authors:

  Elsevier

  The Boulevard, Langford Lane
  Kidlington, Oxford  United Kingdom  OX5 1GB
• Authors:
  • Nielsen, E P
  • Geiker, M R
• Publication Date: 2003-1

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 133-138
• Serial:
  • Cement and Concrete Research
  • Volume: 33
  • Issue Number: 1
  • Publisher: Elsevier
  • ISSN: 0008-8846
  • Serial URL: http://www.sciencedirect.com/science/journal/00088846

Subject/Index Terms

• TRT Terms: Chlorides; Diffusivity; Durability; Hydration; Mathematical models; Numerical analysis; Percent saturation; Portland cement
• Subject Areas: Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 00986468
• Record Type: Publication
• Files: TRIS
• Created Date: Feb 8 2005 12:00AM