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Acoustic Behavior of Subfloor Lightweight Mortars Containing Micronized Poly (Ethylene Vinyl Acetate) (EVA)

Laboratory of Materials Chemistry Research, University of Caxias do Sul, Rua Francisco Getúlio Vargas, 1130, Caxias do Sul RS 95070-560, Brazil
Laboratory of Constructive Technology, University of Caxias do Sul, Avenida Frederico Segala, 3099, Caxias do Sul RS 95010-550, Brazil
Author to whom correspondence should be addressed.
Academic Editor: Prabir Sarker
Materials 2016, 9(1), 51;
Received: 9 October 2015 / Revised: 15 November 2015 / Accepted: 25 November 2015 / Published: 15 January 2016
(This article belongs to the Special Issue Utilisation of By-Product Materials in Concrete)
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This paper aims to contribute to acoustical comfort in buildings by presenting a study about the polymer waste micronized poly (ethylene vinyl acetate) (EVA) to be used in mortars for impact sound insulation in subfloor systems. The evaluation method included physical, mechanical and morphological properties of the mortar developed with three distinct thicknesses designs (3, 5, and 7 cm) with replacement percentage of the natural aggregate by 10%, 25%, and 50% EVA. Microscopy analysis showed the surface deposition of cement on EVA, with preservation of polymer porosity. The compressive creep test estimated long-term deformation, where the 10% EVA sample with a 7 cm thick mortar showed the lowest percentage deformation of its height. The impact noise test was performed with 50% EVA samples, reaching an impact sound insulation of 23 dB when the uncovered slab was compared with the 7 cm thick subfloor mortar. Polymer waste addition decreased the mortar compressive strength, and EVA displayed characteristics of an influential material to intensify other features of the composite. View Full-Text
Keywords: recycled aggregates; lightweight mortar; poly (ethylene vinyl acetate); impact noise recycled aggregates; lightweight mortar; poly (ethylene vinyl acetate); impact noise

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Brancher, L.R.; Nunes, M.F.O.; Grisa, A.M.C.; Pagnussat, D.T.; Zeni, M. Acoustic Behavior of Subfloor Lightweight Mortars Containing Micronized Poly (Ethylene Vinyl Acetate) (EVA). Materials 2016, 9, 51.

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