Microstructural and chemical characterization of some wastes for phonoabsorbant materials obtaining

Composite materials obtaining, based on wastes mixing, can have both, economical and social positive impact, and also the use of such composites materials leads to a level of environmental pollution reduction, generally, and in the level of noise pollution, particulary. This aim of this study is essential for the future development of such materials because, the results will give us informations regarding the formulation of oxide and polymeric composite materials, by associating the components and leads us to superior properties products, having the property to
absorb sound waves. In this paper we characterize a number of wastes that are resulting from industrial technological processes. The wastes are characterized by granulometry, oxide composition and apparent porosity that are specific properties for obtaining composite materials with sound-absorbing properties.