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Matéria (Rio de Janeiro)

On-line version ISSN 1517-7076

Abstract

MOHAMAD, G.; ACCORDI, J.  and  ROCA, L.E.. Evaluation of the association of glass and carbon fibers for strengthening of eucalyptus wood in natura and autoclaved. Matéria (Rio J.) [online]. 2011, vol.16, n.1, pp. 621-637. ISSN 1517-7076.  http://dx.doi.org/10.1590/S1517-70762011000100009.

The practice of structural strengthening demands knowledge about which methods can be used, as well as the behavior among evaluated materials. In the context of Civil Engineering, reliable methods are required for the recuperation and strengthening of woods structures. The most used fibers to recover historic buildings are carbon, glass and aramid fibers. Thus, the goal of this research was to evaluate the association of carbon and glass fiber with adhesive epoxy in woods as Eucalyptus grandis in natural and autoclaved using tensile tests and failure mode. We studied this kind of combination for strengthening wood structures using direct tensile test. Our results showed that carbon fiber is better than glass fiber considering failure mode. On the other hand, strengthening wood structures with carbon fiber recovered 90% of the tensile strength of the materials. Furthermore, Eucalyptus in natura and autoclaved did not present significant differences on their performances under tensile testing with reference to the adherence of the adhesive epoxy.

Keywords : Strengthening; Wood Structures; Carbon Fiber; Glass Fiber.

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