Bond Reinforcement in Ultra High-Strength Concrete

Ultra high strength concrete (UHSC) is undoubtedly an engineered high-tech material, which can be seen as the latest step in concrete technology development. Because this concrete type is relatively new, the structural behavior in the ultimate limit states as well as in the serviceability limit states is not fully investigated and understood, so is the bond behavior of reinforcement. An experimental program was set up to investigate the bond behavior of conventional reinforcement and of reinforcement with a new deep-ripped surface pattern in ultra high strength concrete. The assessment of the bond behavior concrete ages of 3, 7, 28 and 56 days using pull-out specimens was the subject of the investigation. Varying parameters in this research program were rebar diameter, type of reinforcement, surface geometry of the rebar, size of the concrete cover and the loading rate. The concrete comprehensive and splitting tensile strength was measured at the same test ages. In general, the bond of reinforcement in UHSC is characterized by very high maximum bond stresses as well as high bond stiffnesses, even at early ages. The reinforcing mesh bars with the “deepribbed” surface showed a remarkably ductility. This paper presents the details of the investigation and discusses the results obtained.

Language

  • English

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 513-528
  • Monograph Title: Seventh International Symposium on the Utilization of High Strength/High-Performance Concrete
  • Serial:
    • Volume: 1 & 2

Subject/Index Terms

Filing Info

  • Accession Number: 01005970
  • Record Type: Publication
  • ISBN: 0870311808
  • Files: TRIS
  • Created Date: Sep 30 2005 1:12PM