EFFECT OF RIB PATTERN ON THE BOND STRENGTH OF REBARS by Jagvir Singh
Abstract
The transfer of forces from rebars to encompassing concrete in reinforced concrete (RC) is affected by numerous parameters. A few endeavors were made to comprehend the impact of bond on worldwide conduct of RC members. However, comparison data on bond strength of various rib patterns for various diameter is inadequate. An attempt was made to contemplate the impact of different parameters on bond, for example, depth of cross ribs, spacing between two neighboring ribs and embedment length. The present study is done on rebar of diameters 12mm, 16mm, 20mm and 25mm. For embedment lengths of 75mm, 150 mm, 225mm, 300mm and 375mm for 12mm diameter, for M25 concrete grade. The bars were inserted in concrete with confinement utilizing spirals reinforcement according to IS 2770:1967. The casting was finished keeping the bars in the vertical position. The anchorage bond specimens were tested utilizing universal testing machine. The bond stress was found to decreasing as the bar diameter increased. Bond failure was seen during pullout test in confined specimens.
