A Comprehensive Review on the Factors Affecting Bond Strength in Concrete

Abstract

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.

Effect of different material constitutive models in estimating the residual moment capacity of RC beams subjected to natural corrosion

“…However, it is evident that the C f increased at the 10-mm diameter. Previous experiments have shown that rebars with larger diameters tend to trap more bleed water during concrete placement than those with smaller diameters, thus, lowering the bonding between concrete and steel (Chen and Su, 2021;Vembu and Ammasi, 2023). Bars with higher D o also have lower concrete confinement since they exhibit larger contraction under tensile stress (Xiao et al, 2021).…”

Compressive and Bonding Performance of GFRP-Reinforced Concrete Columns

“…Concrete with higher strength has a stronger bond between the paste and the aggregate, leading to improvements in the bond strength of concrete [51]. However, it is important to note that other factors such as the surface preparation and condition of the reinforcing bar can also affect the bond strength [52]. The enhancements in mechanical properties of concrete are found to substantially influence the bond performance between concrete and rebar [53].…”