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Question
The bond strength between steel and concrete is due to
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A.
Friction
B.
Adhesion
C.
Both friction and adhesion
D.
None of the above
Answer ( Option C)

Both friction and adhesion

Solution

The bond strength between reinforcement and concrete comes mainly from friction and adhesion and is affected both by the properties of steel as those of concrete and the relative movement due to volume changes, such as concrete shrinkage.
The bond in reinforced concrete beams is the adhesive force developed between the concrete and steel bars embedded in concrete, which resists any force that tends to push or pull the bars.

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