COOLING OF HARDENING CONCRETE BY MEANS OF EMBEDDED COOLING SYSTEMS

KYLNING AV HAARDNANDE BETONG MED KYLSLINGOR

Cooling of hardening concrete is a means of reducing temperature crack formation, due to shrinkage caused by hydration. Removing heat of hydration in newly-poured heavy concrete structures by means of cooling systems of embedded pipes is a generally accepted method in many countries, especially the U.S. In Sweden, however, this procedure is not common. Instead, concrete with low heat cement is often used. When the cooling method is used in Sweden, the cooling is discontinued as soon as the maximum temperature is reached. This article deals with aspects of this type of cooling procedure. It also comprises a theoretical study dealing with strain and stress conditions in concrete that has only just begun to harden. In these cases the relation between strain and the total ductility is important in determining whether cracks will be formed or not. Some advantages of cooled concrete made with ordinary portland cement, compared to concrete made with low heat portland cement, are enumerated in the article. Also test results from both laboratory tests and full-scale tests in the Tingstad-Tunnel, Gothenburg, are presented. Since the cooling method makes it possible to use ordinary cement, all the possibilities and advantages associated with this type of cement can be utilized. In most cases the costs of cooling can be compared advantageously with the costs of using low heat cement.

  • Availability:
  • Corporate Authors:

    Cement och Betonginstitut

    Drottning Kristinas Vaeg 26
    Stockholm 70,   Sweden 
  • Authors:
    • Bernander, S
  • Publication Date: 1973

Language

  • Swedish

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 21-30
  • Serial:
    • Nordisk Betong
    • Volume: 17
    • Issue Number: 2
    • Publisher: Nordiska Betongfoerbundet
    • ISSN: 002913070029-1307

Subject/Index Terms

Filing Info

  • Accession Number: 00265555
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: May 29 1975 12:00AM