EFFECT OF CORROSION AND BAR SPACING ON BOND PROPERTIES OF REINFORCING BARS IN CONCRETE

AN INTEGRATED STUDY OF THE EFFECTS OF CORROSION AND BAR SPACING ON BOND STRENGTH OF INTERMEDIATE GRADE REINFORCING BARS IN CONCRETE WAS UNDERTAKEN. BARS OF VARIOUS SIZES CONFORMING TO ASTM A-305-56T WERE EXPOSED TO THREE DIFFERENT CORROSIVE ENVIRONMENTAL CONDITIONS: NORMAL OUT-OF-DOORS, MOIST ROOM (100% RELATIVE HUMIDITY), AND SIMULATED SEAWATER SPRAY, FOR EXPOSURE TIMES VARYING UP TO TWELVE MONTHS. THE TEST DATA SUPPORT THE CONCLUSION THAT CORROSION WILL NOT AFFECT THE BOND STRENGTH OF MODERN DEFORMED BARS PROVIDED MINIMUM ASTM WEIGHT REQUIREMENTS FOR THE BARS ARE MET. BOND STRENGTH WAS REDUCED BY DECREASING THE BAR SPACING. FURTHER THE RESTRICTION THAT BUNDLED BARS MUST HAVE BINDING APPEARS UNWARRANTED. /AUTHOR/

• Corporate Authors:

  University of Oklahoma, Norman

  660 Parrington Oval
  Norman, OK  United States  73019-0390
• Authors:
  • Aldridge, W W
  • Ghaffarzadeh, M
  • Farhadi, K
• Publication Date: 1970-2

Subject/Index Terms

• TRT Terms: Bars (Building materials); Bond strength (Materials); Bonding; Corrosion; Corrosion tests; Material reinforcement; Reinforced concrete; Spacing
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00213668
• Record Type: Publication
• Report/Paper Numbers: 213 pp
• Files: TRIS
• Created Date: Jun 1 1970 12:00AM