INVESTIGATION OF CONCRETE EXPOSED TO NORTH SEA WATER SUBMERSION FOR 16 YEARS

In 1976, concrete specimens were submerged in the North Sea. Ordinary portland cement (OPC) with two water-to-cement ratios and blast furnace slag cement (BFSC) were used. After 2, 8 and 16 years, specimens were investigated. The mechanical properties of the concrete appeared not to have changed importantly due to the exposure. The microstructure and the density of microcracks were found to be normal. Sulphate, magnesium and carbonation had penetrated only the outermost few millimeters. Chloride had penetrated strongly in 16 years, depending on the cement type. Diffusion coefficients, calculated from the chloride profiles, were ten times lower for BFSC concrete than for OPC concrete. Consequently, in OPC concrete depassivation of rebars may occur within a few decades; in BFSC concrete loss of passivation can be prevented for 100 or more years.

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  • Corporate Authors:

    Delft University of Technology

    Faculty of Civil Engineering, Stevin Laboratory, P.O. Box 5048
    2600 GA Delft,   Netherlands 
  • Authors:
    • POLDER, R B
    • LARBI, J A
  • Publication Date: 1995

Language

  • English

Media Info

  • Features: Figures; Photos; References; Tables;
  • Pagination: p. 31-56
  • Serial:
    • Heron
    • Volume: 40
    • Issue Number: 1
    • Publisher: Delft University of Technology
    • ISSN: 0046-7316

Subject/Index Terms

Filing Info

  • Accession Number: 00711434
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Sep 15 2001 12:00AM