Elhem GHORBEL
Université of Cergy-Pontoise, France
Title: Comparative study of repairing concrete using Carbon Fiber Reinforced Epoxy Composites and Bioressourced composites
Biography
Biography: Elhem GHORBEL
Abstract
The main objective of this investigation is to evaluate the effectiveness of repairing damaged concrete using bioressourced composite by comparison to traditional ones.
To hit this target, the developed approaches are both experimental and analytical.
The first part of this study is dedicated to the characterization of the both resins (determination of the gel point and reticulation duration, glass transition temperature and mechanical behavior), the unidirectional composites used in the repairing process (mechanical characteristics) and the concrete (compressive and damage behaviors).
The second part is devoted to the experimental study of repaired damaged concrete loaded under compressive tests. Three different damage rates are applied on the concrete before the reparation. For damage rates less than 30%, mechanical performances (Compressive resistance, Stiffness and ductility) are completely restored or even enhanced for repaired concretes using UCFREP composites. A comparative effectiveness of repairing with UFFRBP requires applying two layers on composites instead one for UCFRE .
The third part of this work is dedicated to analytical modeling of mechanical behavior of confined concrete with composite under compression in one hand, and the tensile behavior of the composite in other hand.
Using Bioressourced composite for concrete reparation seems to have excellent performances comparable to Carbone one which encourages its application for concrete structures in civil engineering.