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Fabrication of green composites by waste coconut shells as partial replacement of coarse aggregates in concrete and determination of its acoustic behaviour

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Title Fabrication of green composites by waste coconut shells as partial replacement of coarse aggregates in concrete and determination of its acoustic behaviour
 
Creator Kalauni, Kishor
Kumar, Deepak
Pawar, S J
 
Subject Concrete
Coconut shell
Point method
Sound absorption coefficient
Sound power level
 
Description 112-121
Nowadays, natural materials have been frequently used for sound absorption in constructions and buildings. This paper
has characterised the acoustic behaviour of coconut shell reinforced concrete composite with partial substitution of coarse
aggregates in terms of sound absorption at octave frequency signals (32 Hz-16 kHz). Composites have been prepared in
different weight percentages (5%, 10%, 15%, and 20%) of partial substitution of coarse aggregates. The acoustic test has
been conducted in a 3.5 mm thick glass box without and with samples by point method of sound power measurement. The
results have demonstrated that the value of the sound pressure level has decreased at different points with the increased
percentage of coconut shells in composite, hence increasing the sound absorption coefficient of the concrete. The results
have also been compared with conventional concrete composite. Additionally, the results have indicated that these concrete
blocks can significantly absorb sound in the mid-frequency range. Generally, a sound absorption coefficient greater than
0.2 for any material qualifies it as a sound-absorbing material, and a sound absorption coefficient greater than 0.6 for any
material is known as the best sound absorber. Therefore, developing such green composites can be an eco-friendly approach
to the acoustic community.
 
Date 2023-03-06T11:15:10Z
2023-03-06T11:15:10Z
2023-03
 
Type Article
 
Identifier 0971-4588 (Print); 0975-1017 (Online)
http://nopr.niscpr.res.in/handle/123456789/61498
https://doi.org/10.56042/ijems.v1.148842
 
Language en
 
Publisher NIScPR-CSIR,India
 
Source IJEMS Vol.30(1) [February 2023]