Use of phosphogypsum as mortar - for consolidating mine galleries

摘要

Alpha-hemihydrate formed during mfr. of phosphoric acid is used combined with 0.5-5.0 wt.% of a substance having an alkaline reaction added combined with a sulphate of an alkali added as accelerator is used as a mortar for consolidation of subterranean galleries, the additive providing acceleration of set. The additive is a hydrate of lime or cement, esp. P.