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
    Country/TerritoryFinland
    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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