PROCEDIMENTO PER LA FABBRICAZIONE DI PRODOTTI DI GESSO

PROCEDIMENTO PER LA FABBRICAZIONE DI PRODOTTI DI GESSO

Gypsum prods. are made by moulding ground natural gypsum dihydrate, followed by a heat treatment and hardening of the moulded body. The heat treatment takes place in air at 100-200 degrees C. The temp. rise occurs at a rate of 2-3 degrees/min. After this the prod. is cooled to =50 degrees C and the...

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Bibliographische Detailangaben
Hauptverfasser: TRUTNEV VIKTOR ALEXEEVICH, VOLOVIK BORIS BORISOVICH, KUSHNARENKO VALENTIN KONSTANTINOVIC, AMBARTSUMYAN NIKOLAI STEPANOVICH, ZLOBIN VITALY IVANOVICH, GANNOTA BORIS VASILIEVICH, IGNATOV VALENTIN BORISOVICH
Format: Patent
Sprache:ita
Schlagworte:
ARTIFICIAL STONE
CEMENTS
CERAMICS
CHEMISTRY
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
CONCRETE
LIME, MAGNESIA
METALLURGY
REFRACTORIES
SLAG
TREATMENT OF NATURAL STONE
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Beschreibung
Zusammenfassung:Gypsum prods. are made by moulding ground natural gypsum dihydrate, followed by a heat treatment and hardening of the moulded body. The heat treatment takes place in air at 100-200 degrees C. The temp. rise occurs at a rate of 2-3 degrees/min. After this the prod. is cooled to =50 degrees C and the hardening occurs with moistening. Pref. heat treatment is sufficiently long to dehydrate 90-95 vol.% of the dihydrate. The gypsum is mixed with water prior to moulding so that the wt. ratio water: gypsum dihydrate is 0.05-0.1. The gypsum is used to produce building materials for internal and external use. The technique is a simple method of producing relatively non-porous material with a good resistance to water and frost.