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State of The Art Review of Bond Properties of Reinforcing Bar Embedded in Brick Aggregate Concrete

Nushrat Zahan Mim, Khadiza Rashid Nira, Ahanaf Tahmid, Sharmin Reza Chowdhury

Abstract


In this study, an overview focusing on the bond properties of reinforcing bars embedded in brick aggregate concrete (BAC) has been carried out. The key objective of this paper is to review the influence of the parameters on bond strength. Here factors such as concrete compressive strength, bar diameter, concrete cover, tensile strength, c/db ratio, development length of reinforcing bar as well as temperature that affect bond properties have been discussed. Also, a comparison between bond strength in BAC and stone aggregate concrete (SAC) has been shown. Because of the low modulus of elasticity, higher absorption capacity, and low unit weight of brick aggregate, the bond strength between bars and BAC differs from that of reinforcing bars embedded in SAC and it has been shown that bond strength in BAC is lower than in SAC. Compressive strength is low while tensile strength capacity in BAC is found to be higher comparatively if first-class brick aggregates are used. Since most of the works are done so far on SAC, so to predict the bond strength of SAC some of those available design provisions, descriptive equations have been used which are mainly for unconfined concrete or concrete that is not confined by transverse reinforcements. The bond strength of BAC has been determined using the proposed equation recommended by a researcher and compared with the predicted bond strength in SAC. The conclusion of this study is drawn based on the findings from existing literature or works on bond strength. On this account, this paper can be an aid to those to get a general idea about bond strength affecting parameters.

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References


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