Estudos comparativos de ensaios de flexão em placas cimentícias reforçadas com fibras naturais para uso na construção civil

Abstract

The present work presents a comparative research regarding the four-point bending test on cementitious composites reinforced with three types of fibers: sisal, curauá and jute. The research first presented an overview of the use of composite materials, as well as the applications of natural fibers, in general, in cement matrices. In addition to the description of the three fibers analyzed, the analysis of the interaction between the fiber and the cementitious matrix was also presented, as well as the mechanical behavior of matrices reinforced with natural fibers in the flexural test. Due to this being a bibliographical research, three studies were described involving sisal, curauá and jute fibers, highlighting the treatment of the fibers, the production of mortar and the composite. Then, the results of maximum tension resistant to flexion were observed and it was concluded that the composites reinforced with curauá fibers treated with aluminum oxide and sand, had a better performance in the flexion test, as a consequence of the better adhesion of the fiber in the matrix, provided by the treatment carried out and also by the high tensile strength characteristics of the fiber itself.