ACOUSTIC ABSORPTION, RHEOLOGICAL AND MECHANICAL CHARACTERISTICS OF WASTE EGG BOXES FIBERS FILLED SBR

Abstract

There are a few interesting to develop a procedure for design material with high acoustic absorption with broad acoustic frequencies range  and assess the potential of using waste living materials as the primary component in the production of sound absorbing materials for use in walls and ceilings. This research provides experimental investigations for design and optimization of composite sound absorbers with styrene butadiene rubber (SBR) and waste egg boxes (EB) fibers. The SBR/EB composites have been investigated for their acoustic absorption at different frequencies, their mechanical and rheological properties. Results indicated that an increasing EB composition enhanced the acoustic absorption coefficient. The density of SBR/EB composites were directly related to the presence of the EB fibers. The principal experimental evidences of nonlinear behavior of viscoelastic materials were discussed by investigating the stress-strain curve. In view of the rheological properties, the SBR/EB composites showed shear thinning behavior at various different conditions, that the apparent viscosity reduced with increasing shear rates and it was greater temperature sensitivity. Eventually, the data obtained clearly indicated that the heterogeneity and the viscosity of the materials play very important factors to provide suitable absorbers, these new materials were beneficial for using as a sound absorber and could be used as an alternative replacement for conventional product because for instance, they are cheaper, nonabrasive and may serve to reduce the noise pollution.