Effect of Reinforcing Bar Orientation and Location on Bond with Self-Consolidating Concrete

Self-consolidating concrete (SCC) is more workable than vibrated concrete (VC) when it is fresh. This workability supports the use of SCC in congested and restricted areas without adding vibration. However, there are also some differences in the concretes once they have hardened. This article reports on a study of the effect of reinforcing bar orientation and location on steel-concrete bond behavior. The study used SCCs and two VCs and the concrete casting direction is always vertical. For small-size concrete elements, SCC25 shows a better resistance against bleeding than VC25. The difference, however, is not significant for SCC40 and VC40. For samples reinforced with ribbed bars, the orientation of the bars (horizontal or vertical) has a significant and equivalent influence on both 25 MPa (3625 psi) concretes. The VC40 and SCC40 bond strength values are almost equivalent and not affected by the orientation of the bars. For tall concrete elements, voids formation under the horizontal bars was clearly observed for every type of concrete. The authors note that the size of the voids was almost equivalent for SCC25, SCC40, and VC40, but significantly larger in the case of VC25, especially near the top casting surface. Finally, the ultimate bond strengths (not affected by the casting conditions) obtained were approximately 20% higher for SCC than for VC, regardless of the concrete strength, for samples reinforced with ribbed bars.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/13846957
• Authors:
  • Castel, Arnaud
  • Vidal, Thierry
  • Viriyametanont, Kriengkai
  • Francois, Raoul
• Publication Date: 2006-7

Language

• English

Media Info

• Media Type: Print
• Features: Figures; Photos; References; Tables;
• Pagination: pp 559-567
• Serial:
  • ACI Structural Journal
  • Volume: 103
  • Issue Number: 4
  • Publisher: American Concrete Institute (ACI)
  • ISSN: 0889-3241
  • Serial URL: http://www.concrete.org/PUBS/JOURNALS/SJHOME.ASP

Subject/Index Terms

• TRT Terms: Adhesive bond strength; Casting; Compressive strength; Concrete; Concrete curing; Concrete hardening; Reinforcing bars; Vibration
• Uncontrolled Terms: Self-consolidating concrete; Vibrated concrete
• Subject Areas: Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 01037328
• Record Type: Publication
• Files: TRIS
• Created Date: Nov 28 2006 11:31AM