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.
Seeking to combine thermal comfort with the reuse of difficult degradation materials, which generate large volumes discarded in landfills, this study aims to use Poly (vinyl) chloride (PVC), rock wool and Medium Density Fiberboard (MDF) waste in the manufacture of nonstructural boards in civil construction. The samples were prepared by varying the formulations in order to find the one that has better thermal conductivity contribution. The work, still in progress, presents lower swelling results to the average of insulating materials, and water absorption of the plates lifted by the use of sodium bicarbonate; used in the composition to increase the void ratio. Although, separately, the three materials present low thermal conductivity; when mixed the conductivity tends to increase, but still remains below the average value of other sealing materials used in civil construction. Citation: Sirena MC, Zini A, Brancher LR, et al. Characterization of non-structural poly (vinyl) chloride, rock wool and medium density fiberboard waste composites. Citation: Sirena MC, Zini A, Brancher LR, et al. Characterization of non-structural poly (vinyl) chloride, rock wool and medium density fiberboard waste composites.
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