Aplicação de fibras de bambu como reforço para o concreto

Abstract

Possessing a wide range of species, in addition to rapid development and easy adaptability to the environment in which it is inserted, bamboo stands out when compared to other natural materials. In addition to that, its properties make it a light and resistant material, allowing several applications, whether structural or its incorporation into other elements, either as reinforcement or the very basis of a composite. Given this, this work analyzed the results of incorporating bamboo fiber as a reinforcement for concrete. For this, ultrasonic and compression tests were carried out on samples molded with additions of synthetic and bamboo fibers, and without the addition of fiber, used as a reference. After carrying out the ultrasonic test, it could be seen that the incorporation of bamboo fibers interfered in the presence of internal voids, but that their incorporation did not significantly affect the quality of the material, having as a standard analysis the average speed found of 4799 .0 m/s, 4792.4 m/s, 4654.5 m/s and 4633.1 m/s for samples without fiber, with treated bamboo fiber, with untreated bamboo fiber and with synthetic fiber, respectively. It was also observed that the velocity of propagation of longitudinal waves obtained was directly related to the final resistance, where the samples without the addition of fibers presented an average resistance of 22.54 MPa, while the elements molded with treated bamboo fibers, fibers untreated bamboo and synthetic fibers showed resistance of 19.90 MPa, 19.43 MPa and 17.89 MPa, respectively. At this point, better strengths are visible for samples molded with treated and untreated bamboo fibers, when compared to synthetic fibers. In addition, it was noted that, after reaching its breaking strength, the samples with natural fibers showed better behavior, not fragmenting, indicating an increase in ductility and tenacity in the concrete. Added to this, obtaining the fibers is something viable and their raw material is of natural origin, they have excellent properties, are easy to obtain and have lower environmental impacts. Thus, it becomes feasible to continue studies in this area of knowledge and indicate the implementation of the material in civil construction with a view to encouraging the replacement of synthetic fiber, which will lead to the use of a more economical, sustainable and easily obtainable material.