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Fosfogesso per la produzione di materiali da costruzione
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ISBN10: 6208404983
ISBN13: 9786208404987
Publisher: Edizioni Sapienza
Published: Dec 22 2024
Pages: 76
Weight: 0.27
Height: 0.18 Width: 6.00 Depth: 9.00
Language: Italian
ISBN13: 9786208404987
Publisher: Edizioni Sapienza
Published: Dec 22 2024
Pages: 76
Weight: 0.27
Height: 0.18 Width: 6.00 Depth: 9.00
Language: Italian
Questo studio è stato dedicato all'utilizzo del fosfogesso - scarto della produzione di fertilizzanti fosforici, scarti della produzione di calce e sabbia di estrazione dell'oro - per formare nuovi materiali da costruzione. I risultati ottenuti nelle prove di resistenza alla compressione monoassiale hanno raggiunto 8,3 MPa al 3 giorno di maturazione e 13,5 MPa al 90 giorno. Il materiale presentava un coefficiente di resistenza all'acqua di 0,95 a 28 giorni, un assorbimento d'acqua dell'8,6% e valori di espansione al 3 giorno dell'1% e dell'1,5% dopo un anno e mezzo di stagionatura. Le proprietà meccaniche dei materiali sviluppati soddisfano i requisiti della norma NBR 7.170/83 per i mattoni pieni delle classi A, B e C e per i blocchi ceramici delle classi 15 e 25. Utilizzando XRD, XRF, SEM e EDS, sono stati studiati i processi fisico-chimici coinvolti nella formazione delle strutture dei nuovi materiali, dovuti alla trasformazione dei minerali cristallini e alla sintesi di sostanze amorfe, simili alle strutture presenti nel gesso.
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