| 摘要 |
FIELD: oil and gas industry, cementing of oil, gas and gas condensate wells. SUBSTANCE: modified gypsum-cement grouting mixture includes Portland cement, gypsum and calcium hydrocarboaluminate and quinhydrone with following proportion of components, per cent by mass: Portland cement 50.0-96.0; gypsum 2.0-25.0; calcium hydrocarboaluminate 1.98-24.95; quinhydrone 0.02-0.05. EFFECT: raised frost resistance, decreased degree of destruction of cement stone. 1 tbl _
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