Abstract
Abstract An experimental investigation was conducted to study the bond strength of full-scale beams constructed with two different Eco-Crete (low cement content, high cracking resistant concrete with micro and macro fibers) mixes as well as a conventional concrete (CC) mix. This experimental program consisted of nine full-scale, four-point loading beams (three for each mix). The experimental bond strengths of the beams were compared based on code provisions and proposed analytical models. Furthermore, the bond strengths of the beams were compared with a bond database of CC beams. In addition, statistical data analyses (parametric and non-parametric) were performed to evaluate whether or not there is any statistically significant difference between the bond strength of the Eco-Crete and CC beams. Results of this study show that the Eco-Crete beams with micro fibers possess approximately 5% higher bond strength compared with the CC; however, the Eco-Crete beams with micro and macro fibers showed approximately 25% lower bond strength compared to CC beams because of internal honeycombing around the splice region.
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