Journal
MATERIALS
Volume 12, Issue 16, Pages -Publisher
MDPI
DOI: 10.3390/ma12162584
Keywords
sound absorber; cigarette butts; sustainable material; recycling; variability analysis
Categories
Funding
- Altadis (Imperial Tobacco)
- European Regional Development Fund (ERDF)
- Junta de Extremadura, Consejeria de Economia, e Infraestructura [IB18033]
- Agencia Estatal de Investigacion, Spain [MTM2017-86875-C3-2-R]
- Junta de Extremadura, Spain [GR18108, GR18107]
- Juan de la Cierva-Incorporacion contract from the Spanish Ministry of Economy, Industry and Competitiveness [IJCI-2016-28923]
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There has been increasing interest in new sustainable materials that can be used as construction materials. Among them, sound-absorbing materials have an important role in both acoustical room conditioning and in room insulation. As a proposal for recycling, one of the most common residues in the world, cigarette butts, is studied. Samples were prepared with used cigarette butts as acoustical absorbent materials. Several samples were prepared and grouped by similarity. Variability analyses of the samples prepared in each group were performed. Moreover, the analysis of some possible influences on absorption properties, such as the length of butts, presence of burnt regions, presence of wrapping paper, etc., were analyzed. The results show the potentiality of this residue to be used as an acoustical absorbent since the absorption coefficients found are greater than 0.8 for frequencies over 2000 Hz. The observed variability in the study group and samples can be considered low, as it was below 2% for the major part of frequencies. Influences on the absorption coefficient, for both the length and status of the butts, were statistically confirmed.
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