Bond Characteristics of Reinforcing Steel Bars Embedded in Self-Compacting Concrete

Abstract Self-compacting concrete (SCC) is a special high-performance concrete type with a high flowability that can fill formwork without any mechanical vibration. Modification in the mix design of SCC can have a significant influence on the material’s mechanical properties. Therefore, it is important to investigate whether all of the assumptions about conventional concrete (CC) design structures are also valid for SCC construction. Bond behaviour between concrete and reinforcement is a primary factor in the design of reinforced concrete structures. This study presents a bond strength model and bond-slip relationship based on the experimental results from eight recent investigations of SCC and CC. In addition, the proposed model, code provisions, and empirical equations and experimental results from recent studies on the bond strength of SCC and CC are compared. The investigated parameters on bond strength are the steel bar diameter, concrete compressive strength, concrete type, curing age of the concrete, and height of the embedded bar along the formwork.

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