Abstract
This study presents the characterization of the mechanical and durability performance of wet lay-up flax/epoxy composites used for the external strengthening of concrete structures. The composites are manufactured using different weight bases and flax woven fabric as well as a bidirectional glass fabric for the control samples. The tomography observations reveal good impregnation of the fibres and porosity mainly located along the fibre bundles. The influence of the choice of fabric and the number of fabric layers on the properties are then examined by mechanical tensile testing. The glass and flax composites present comparable tensile stress at failure. The properties, calculated with the portion of the dry fibres only, remain constant with the number of layers. Durability tests are then performed to estimate the residual properties after two kind of ageing, i.e., accelerated and natural.
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