FIELD: building materials, particularly, gypsum binder may be used in manufacture of building structures and parts. SUBSTANCE: gypsum binder includes gypsum and additive in the form of wastes of metal working - organo-mineral sludge (oil sludge) with the following amounts of components, mas.%: gypsum, 99.8-99.5; organo-mineral sludge (oil sludge), 0.5-0.2. EFFECT: higher water resistance, increased strength of building structures and articles and cut down cost due to utilization of metal working wastes. 2 tbl
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