Influence of fly-ash filler and moisture content on vibrational and acoustic properties of basalt fibre reinforced composites

Document Type

Article

Publication Title

Advances in Materials and Processing Technologies

Abstract

Fly ash, a by-product of coal combustion consisting of particulates and flue gases expelled from coal-fired furnaces, has found application as a substitute for organic fillers in the composites industry. In this study, the focus lies on assessing the vibrational and acoustic performance of composites composed of epoxy-based basalt combined with fly ash. Experimental investigations were carried out on specimens containing different weight percentages of fly ash (0%, 10%, 15% and 20% of the epoxy weight) to evaluate free vibration and acoustic impedance. Additionally, the impact of moisture on the vibrational and acoustic properties of Basalt/Fly ash-Epoxy composites was examined by subjecting the specimens to 3 months of ageing in distiled water. The results revealed that increasing the filler content up to 15% led to an increase in natural frequencies (8.5 Hz) and stiffness (3.8 N/mm) of the material, although the damping ratio (0.219) has decreased. Notably, as the specimens aged, the damping ratio is improved by 9%, while the natural frequency and stiffness decline by 9.67% and 12.5%, respectively. The material density emerged as a critical factor influencing the sound absorption capability of the specimens. The inclusion of fly ash in the epoxy matrix has enhanced the acoustic properties of the tested specimens.

First Page

1072

Last Page

1084

DOI

10.1080/2374068X.2024.2357935

Publication Date

1-1-2025

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