| 摘要 |
FIELD: manufacture of building materials. SUBSTANCE: sealing agent includes (in wt %): Portland cement, 30- 47; building gypsum, 3-6; quartz sand, 47-58; and functional additive being unsaturated solid solution of sulfuric and/or carbonic acid anhydride in tetracalcium hydroaluminate, 3-6. The sealing agent is characterized by hardening time 80-150 min and expansion 0.07 (3 days)-0.1 (28 days), possessing good water resistance and strength. Agent may be utilized for filling joints in building constructions. EFFECT: improved quality. |
