| 摘要 |
FIELD: construction. ^ SUBSTANCE: additive for modification of gypsum binders, construction mortars contains the following components, wt %: construction gypsum 65.0-75.0, Portland cement 24.0-28.0, microsilica 2.0-4.0, superplasticiser 0.7-1.2, redispersed polymer 0.8-1.2, regulator of setting and hardening time 0.04-0.06. Additive in the form of setting and hardening time regulator may contain tartaric acid. ^ EFFECT: accelerated hardening, higher water resistance, reduction of shrink deformations of cement stone. ^ 2 cl, 3 ex |
