Title:
131-584 Bending and Straightening of Grade
60 Reinforcing Bars
Author(s):
J. P. Stecich, John M. Hanson and Paul F. Rice
Publication:
Concrete International
Volume:
6
Issue:
8
Appears on pages(s):
14-23
Keywords:
bending (reinforcing steels); bend tests;
heating; reinforcing steels; research; temperature; ten-sile
properties; yield point.
DOI:
Date:
8/1/1984
Abstract:
Bending and straightening tests were conducted on Grade 60 reinforcing bars. Three sizes of billet steel bars were included in the tests; #5, #8, and # 11. The bars were obtained from three sources, one source supplying all three sizes and two only the # 11 bars. Tests were done at cold and room termperatures. Bars were bent to the minimum diameter specified in the American Concrete Institute’s Building Code Requirements for Reinforced Concrete (ACI 318-83) and to as small a diameter as possible. Bending was done around the weak and strong axis. Some bars were flame heated to approximately 1500 F (820 C) to reduce breakage. Tensile tests were conducted on straightened bars to compare with tensile tests of unbent con trol bars.