A Comprehensive Review on the Factors Affecting Bond Strength in Concrete

The interaction of reinforcement bars with concrete determines the structural behavior and bond performance (bond strength) in reinforced cement concrete. Bond strength and its importance in structural applications based on available standards attracted researchers around the globe to evaluate the bond strength in reinforced cement concrete through various test methods and procedures. In this review article, more than 200 globally published studies were collected, and 170 articles were compiled to discuss the importance of bond strength and the factors that affect bond strength in concrete. The various factors/parameters that affect the bond strength, including concrete type and its properties, the reinforcement bar with its geometry and shape, environmental nature of the specimen with its testing methods and standards, and other miscellaneous factors, were comprehensively analyzed. We present a summary of the findings; a surprising fact was that every factor is responsible for developing bond strength in concrete in one way or another.

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