Home Chi siamo La perlite espansa Sostenibilità e LEED® Contatti PRODOTTI DOWNLOAD PROGETTISTI LA PERLITE ESPANSA La perlite è una roccia vulcanica effusiva di colore variabile tra il grigio e il rosa, la cui composizione chimica è analoga a quella di rioliti e daciti. La perlite ha la capacità di espandere il proprio volume fino a 20 volte rispetto a quello originale quando viene portata ad elevate temperature, prossime al suo punto di rammollimento. The expansion is linked to the presence of water which has remained confined in the closed porosity of the rock due to the sudden cooling during the release of the magma. When subjected to temperatures between 550 and 900 ° C, the rock expands due to the vaporization of the water: in this irreversible process bubbles are generated inside the granules which give the expanded rock the exceptional lightness that characterizes it, one extraordinary thermal insulation power and the typical white color . The final structure of the expanded perlite granules shows the coexistence of a network of open macroporosities (channels communicating with each other starting from the external surface of the granule) and closed microporosities (isolated cavities inside the granule), which give the exceptional physical characteristics of above to the material. The entire production process of expanded perlite, from crushing and granulation of the rock to firing, as well as the implementation phases, are characterized by the absence of VOC (Volatile Organic Compounds), fibers, Radon and gas emissions. toxic or dangerous particles . Copyright 2021 © | Perlite Italiana Srl | Towpath Trento, 7 | 20094 Corsico (Milan) | tel. 0039 02 4407041 CF / PI 01751120153 | Share capital € 1,700,000 fully paid-up | Privacy | Cookies | Credits

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