Abstract
The main aim of the paper is to present a detailed analysis of the bond between new high-strength steel bars B600B produced in Poland in Celsa Huta Ostrowiec and high-strength concrete. The steel bars are characterized by an increased (relative to normal steel) yield point, which is more than 600 MPa. The present standard for reinforced concrete structures Eurocode 2 2008 specifies design guidelines only for steel bars with a yield stress of not more than 600 MPa. The paper presents the results of experimental tests of the bond of B600B steel bars with the diameters of 16 mm and 32 mm for C50/60 concrete. The tests were carried out using the pull-out method recommended by RILEM. The anchorage sections with a base length of 2.5φ were selected for analysis. Based on the experimental studies of the properties of concrete and steel and the experimental pull-out tests, an analytical study was conducted to determine the stress value of bond using the formulae found in the available literature. The analyses have demonstrated that steel bars B600B produced by Celsa Huta Ostrowiec in Poland meet the requirements of the European standards for value of bond stress.
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