Chloride Ingress into Concrete under Water Pressure

Mia Schou Lund, Lotte Braad Sander, Bent Grelk, Kurt Kielsgaard Hansen

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Abstract

The chloride ingress into concrete under water pressures of 100 kPa and 800 kPa have been investigated by experiments. The specimens were exposed to a 10% NaCl solution and water mixture. For the concrete having w/c = 0.35 the experimental results show the chloride diffusion coefficient at 800 kPa (~8 atm.) is 12 times greater than at 100 kPa (~1 atm.). For w/c = 0.45 and w/c = 0.55 the chloride diffusion coefficients are 7 and 3 times greater. This means that a change in pressure highly influences the chloride ingress into the concrete and thereby the life length models for concrete structures.
Original languageEnglish
Title of host publicationNordic Concrete Research : Proceedings of XXI Nordic Concrete Research Symposium, Hämeenlinna, Finland 2011
Place of PublicationOslo
PublisherNorsk Betongforening
Publication date2011
Pages207-210
Publication statusPublished - 2011
Event21st Nordic Concrete Research Symposium - Hämeenlinna, Finland
Duration: 30 May 20111 Jun 2011
Conference number: 21

Conference

Conference21st Nordic Concrete Research Symposium
Number21
CountryFinland
CityHämeenlinna
Period30/05/201101/06/2011

Bibliographical note

Edited by The Nordic Concrete Federation.

Keywords

  • Water pressure
  • w/c-ratios
  • Chloride diffusion coefficient
  • Concrete

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