Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
STUDY OF ADHESION BEHAVIOR OF THE SISAL FIBER WITH SURFACE TREATMENT IN PORTLAND CEMENT BASED MATRIX
Submission Author:
Camila Cardoso , RS
Co-Authors:
Camila Cardoso, Matthews Bandeira, Nadine Machado Ficher, Ederli Marangon, Luis Kosteski, Ana Paula Garcia
Presenter: Camila Cardoso
doi://10.26678/ABCM.COBEM2019.COB2019-1858
Abstract
Choosing the use of vegetable fibers as reinforcement has been considered beneficial because these require less energy for extraction and may improve the mechanical properties of the composite. However, modifying the characteristics of natural fibers by applying some type of treatment may provide an increase in the anchoring ability of the fiber to matrix. Thus, this study aims to apply a treatment using expanded polystyrene and rice husk silica in natural sisal fibers, in order to evaluate its influence on the fiber-matrix adhesion capacity through pullout tests using fiber embedment length of 50 mm, for the control age of 7 and 28 days. The absorption capacity and surface microstructure of the sisal fiber were also evaluated. Based on the obtained results, the water absorption index of treated sisal fibers was considerably reduced and the optical microstructure images showed possible fiber sealing through the proposed treatment, besides agglutination points along the fiber, which may have been a possible contributing factor to lower matrix-fiber adhesion. It was verified, through the statistical analysis of the pullout load values, that the proposed treatment did not promote increase of the adhesion capacity of the fiber with the cementitious matrix.
Keywords
Sisal fiber, Surface Treatment, pullout test, cementitious composites
