COMPOSITE WATER-RESISTANT GYPSUM BINDING AGENT Russian patent published in 2014 - IPC C04B28/14 C04B7/14 

FIELD: chemistry.

SUBSTANCE: composite water-resistant gypsum binding agent contains obtained by combined milling fine milled mixture of refinery slag and gypsum of calcium sulfate dehydrate. Binding agent contains refinery slag of stove-busket, additive with pozzolanic properties and periclase hydration activator with component ratio in binding agent, wt %: refinery slag of stove-busket 80-50; calcium sulfate dihydrate 10-25; additive with pozzolanic properties 9.5-23; periclase hydration activator 0.5-2.0. As calcium sulfate dihydrate it contains natural gypsum, fluoroanhydride or phosphogypsum. As additive with pozzolanic properties it contains lime stone or marble, acid slag of electric steel-making or red mud. As activator of periclase hydration it contains bischofite or sulfuric magnesium.

EFFECT: prevention of formation of hydration products, causing weakening of binding agent in application of refinery slag of stove-busket, with preservation of its strength characteristics.

9 cl, 2 dwg, 2 tbl