This article details the curing process of precast concrete tunnel lining segments of the Boezberg highway tunnel between Zurich and Basel in Switzerland. Tunnel lining segments were steam cured at low (atmospheric) pressure, then cured again after removal from steel molds by covering with insulation mats. This process protected the very warm concrete elements in the outdoor storage area from thermal shocks and protected them from rapid moisture loss. Curing in this manner allowed elements to be free of microcracks. In addition, the compressive strength in the segments was 10 to 30 percent higher than segments left uncovered. The article describes the manufacture of the concrete segments and a test program.


  • English

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 51-54
  • Serial:
    • Concrete International
    • Volume: 16
    • Issue Number: 7
    • Publisher: American Concrete Institute (ACI)
    • ISSN: 0162-4075

Subject/Index Terms

Filing Info

  • Accession Number: 00664733
  • Record Type: Publication
  • Files: TRIS, ATRI
  • Created Date: Aug 12 1994 12:00AM