Effect of mechanical activation procedure on the phase composition of gypsum

Autor:	M. A. Smirnova, N. F. Kosenko, A. S. Belyakov
Rok vydání:	2010
Předmět:	Vinyl alcohol Materials science Gypsum Maleic acid General Chemical Engineering Metals and Alloys engineering.material Retarder Inorganic Chemistry chemistry.chemical_compound chemistry Phase composition Materials Chemistry engineering Hardening (metallurgy) Organic chemistry Composite material
Zdroj:	Inorganic Materials. 46:545-550
ISSN:	1608-3172 0020-1685
DOI:	10.1134/s0020168510050195
Popis:	This paper examines the effect of mechanical activation by impact and attrition milling in planetary and ball ring mills on the phase composition of gypsum. Partially dehydrated powders obtained without heat treatment contain up to 60–70% β-CaSO4 · 0.5H2O (impact milling) and up to 40–47% α-CaSO4 · 0.5H2O (attrition milling). On the addition of a set retarder (maleic acid + poly(vinyl alcohol)), such materials acquire high strength during hardening: up to 11–17 MPa in compression and 7–12 MPa in bending.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a26f6474c66d37794107038082d0b1cb https://doi.org/10.1134/s0020168510050195 Zobrazit plný text záznamu Plný text ve formátu PDF