Self-consolidating concrete (SCC) is known for its excellent deformability, high resistance tosegregation, and use in congested reinforced concrete structures characterized by difficult castingconditions without applying vibration. Extensive research has been conducted on the development of SCCusing high volumes of supplementary cementing materials (SCM) (such as fly ash and slag) and viscositymodifying admixtures (VMA). The bond characteristics of such SCCs are very important for theirapplication in practical construction. An extensive investigation was conducted to determine the bondstrength between reinforcing steel bar and SCM and VMA based SCC as well as normal concrete (NC).Bond tests were conducted using a specially developed pullout test. The SCC pullout specimens werecast without applying any consolidation, whereas the NC specimens were cast by conventional practicewith consolidation and vibration. It was found that the reduction in bond strength due to bleeding andinhomogeneous nature was less in SCC compared to NC. Although the variation in bond strengths atdifferent casting elevations was observed in SCC, the extent was less significant than that of NC. SCCalso exhibited less significant top-bar effect compared to NC. This can be attributed to the more consistentnature of SCC and its superior filling capability.
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