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Bond of Reinforcement in High-Strength Concrete
Increasing the concrete compressive strength can improve bond performance. In other words, higher adhesion and friction force between concrete and reinforcing bar can be expected for concrete with higher compressive strength. Bond resistance is made up of chemical adhesion, friction, and mechanical interlock between the bar and surrounding concrete. In many reinforced concrete (RC) structural applications, splitting failure is more common and pullout failure exists in a case of short bond lengths. Hence, the concrete tensile strength would be one of the governing factors related to the bond strength. The bond strength of plain concrete is normally represented by the square root of the compressive strength. An increase in the concrete compressive strength increases the bond strength. The confining of transverse reinforcement on concrete should have positive enhancement of bond strength because transverse reinforcement acts to confine the surrounding concrete that suppresses the splitting cracks from propagating to failure, allowing the bars to reach higher bond strength in high-strength concrete.
Bond of Reinforcement in High-Strength Concrete
Increasing the concrete compressive strength can improve bond performance. In other words, higher adhesion and friction force between concrete and reinforcing bar can be expected for concrete with higher compressive strength. Bond resistance is made up of chemical adhesion, friction, and mechanical interlock between the bar and surrounding concrete. In many reinforced concrete (RC) structural applications, splitting failure is more common and pullout failure exists in a case of short bond lengths. Hence, the concrete tensile strength would be one of the governing factors related to the bond strength. The bond strength of plain concrete is normally represented by the square root of the compressive strength. An increase in the concrete compressive strength increases the bond strength. The confining of transverse reinforcement on concrete should have positive enhancement of bond strength because transverse reinforcement acts to confine the surrounding concrete that suppresses the splitting cracks from propagating to failure, allowing the bars to reach higher bond strength in high-strength concrete.
Bond of Reinforcement in High-Strength Concrete
ACI structural journal ; 114
2017
Article (Journal)
English
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