ASSESSING SOUND-MUFFLING CHARACTERISTICS OF FLY-ASH NANO-PARTICLE REINFORCED EPOXY RESIN COMPOSITES

Year 2020, , 514 - 524, 28.12.2020

Stephen Durowaye Olatunde Sekunowo Jelili Tiamiyu Samuel Popoola

https://doi.org/10.18038/estubtda.632877

Abstract

Effective reduction and
control of noise have continued to attract attention globally due to the
adverse effects noise poses to human health, effective knowledge dissemination
and desirable environmental tranquility. The use of natural and synthetic reinforced
composites in noise pollution control is an emerging area of research. In this
study, coal fly-ash in nanoparticles varied at 5 – 25 wt. % was employed as
reinforcement in the fabrication of epoxy resin composites. The composites were
characterised both for noise reduction capability and mechanical properties
necessary for a damage-free handling during installation. Results showed that at
5 – 15 wt. % fly-ash nanoparticles addition, the composites demonstrated the
following mechanical properties in terms of flexural strength, 43.7 MPa; impact
energy, 4.8 J and hardness, 25.4 HV. Samples of the composites at 15 wt. %
exhibited the highest noise reduction coefficient (NRC) of 0.8072. Contributions to these levels of performances
appeared to have stemmed from the nature (connected or isolated) and dispersion
of pores induced in the material during mixing and subsequent curing. The
composites are adjudged suitable for deployment as noise muffling material in
facilities that are usually subjected to low mechanical system noise sources. 

Keywords

Noise pollution, noise reduction coefficient, polymer matrix composite, fly-ash nanoparticles, mechanical properties

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