DUGi

Comparison of the soundproofing characteristics of olive stone filled polypropylene, gypsum boards and wood fiber reinforced polypropylene

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Noise, caused by the society and technical progress, is nowadays considered a pollutant. Noise pollution affects orcould affect a great number of people. One the most concerned fields, in part by a growing law framework and by thequality expectations of the clients, is architecture. The solution to sound pollution involves eliminating it or reducing itto acceptable levels. Nowadays, one of the most recurred solutions is the use of lightweight materials such as gypsumboards, to create acoustic insulation elements. On the other hand, the environmental awareness has increased theattention towards recycled materials. In the case of composite materials, major attention has been devoted to thesubstitution of mineral reinforcements, such as glass fibers, by more sustainable reinforcements, as wood fibers oragroforestry wastes. In this sense, olive stones, which are a byproduct of olive oil extraction, could be used. In thepresent work, olive stone filled polypropylene composites were prepared. Different percentages of filler were used. Thesoundproofing properties of the composites were tested by means of an impedance tube. Then, the results werecompared with those for gypsum boards, wood veneer and wood fiber reinforced polypropylene

Editura Academiei Romane