"Compósitos de fibras de sisal para uso em reforço de estruturas de madeira" / Sisal composites to reinforcement of timber structures.

AUTOR(ES)
DATA DE PUBLICAÇÃO

2005

RESUMO

Many buildings of cultural and historical interest require reinforcement of their timber structures. This research focuses on fiber-reinforced composites to repair and reinforce such structural elements of wood as an alternative for carbon and glass fibers, which are the materials most commonly used for purposes of reinforcement. Natural fibers are an important alternative, offering several advantages such as their abundant availability, biodegradability and low cost compared with glass or carbon fibers. Sisal In the study reported here, textile sisal fibers and cords were characterized under tensile testing. A new sisal textile was designed based on an industrially manufactured textile for advanced composite arrangements to improve the fibers’ alignment and reduce transverse deformations. Composites consisting of a combination of sisal, commercial epoxy and polyurethane based on castor oil resin matrixes were tensile tested. The effect of sodium hydroxide (10%) treatments on the sisal was also evaluated. The composite material was subjected to bending and shear tests to determine its strength and stiffness, and its wood-composite interface and failure modes were investigated. The results showed that the new Sisal Fiber-Reinforced Plastic (SFRP) is sufficiently strong and stiff to serve as a reinforcement of timber structures.

ASSUNTO(S)

composite sisal compósitos madeira reforço timber reinforcement sisal

ACESSO AO ARTIGO

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