Efficiency of Bio-Sourced Composites in Confining Recycled Aggregates Concrete

Abstract:

This research investigates the efficiency of using Flax Fibers reinforced bio-sourced polymer by comparison to traditional system based on Carbone Fiber Reinforced Epoxy Polymer in order to confine recycled aggregates concrete. Four concrete formulations have been formulated by incorporating recycled aggregates from demolition waste (0%, 30%, 50% and 100%). An air-entraining agent was added to the formulations to achieve the level of 4% occluded air. The main objective is to discuss and to evaluate the effectiveness of confining them using bio-sourced composite by comparison to traditional ones. To hit this target, the developed approaches are both experimental and analytical. The first part is experimental and aimed to characterize the mechanical behavior of the materials: the composites used in the confining process the unconfined concrete (effect of incorporating recycled aggregates on the overall mechanical characteristics). We establish that bio-sourced composites are efficient in strengthening recycled aggregates concrete especially if they are air-entrained. The second part of this work is dedicated to analytical modeling of mechanical behavior of confined concrete with composite under compression based on Mander’s model. The input parameters of the model were modified to consider the rate of recycled aggregates incorporation. Comparison between experimental results and the modified Mandel’s Model is satisfactory.

• Periodical: Construction Technologies and Architecture (Volume 1)
• Pages: 505-512
• DOI: https://doi.org/10.4028/www.scientific.net/CTA.1.505
• Online since: January 2022
• Authors: Elhem Ghorbel*, Mariem Limaiem
• Keywords: Bio-Sourced Composite, Carbon-Epoxy Composite, Confinement, Recycle Concrete Aggregate

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