COMPARISON AND TEST METHODOLOGY TO EVALUATE STEEL – CONCRETE BONDING STRENGTH OF THIN REINFORCING BAR
Publication Date : 19/03/2019
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This paper presents comparison of bonding strength and compressive strength between steel and concrete. The bond strength measures the effectiveness of the grip between concrete and steel.In pullout tests on Mild steel bars , the maximum load generally represents the bond strength that can be developed between concrete and steel.With Mild steel bars the maximum load is not very different from the load at the visible slip,But in the case of deformed bar,the maximum load may corresponds to a large slip which may not be obtained in practice before other type of failure occur.It is preferable therefore than comparing plain and deformed bar determined not only the maximum load,But also the load arbitrary amount of slip and also plot the complete load slip curves for the plain and deformed bar under comparison.In bonding strength test,comparison of the load at a relative movement(slip) between steel and concrete of 0.125mm at the free end of the bar in a pullout test. The analysis of the test data shows that a significant co-relation exists between the compressive strength of cube cured under standard conditions and the bonding strength of concrete.
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