FIELD: construction.
SUBSTANCE: composition for producing gypsum fiber boards comprises, by wt %: hemihydrate gypsum 51.1-51.8, Portland cement 12.9-13.6, cellulosic fiber 3.1-3.5, pozzolana component - metakaolin 2.1-2.4, polycarboxylate ether "Odolit-K" 0.764-0.79, setting and hardening time regulator "Best-TB" 0.162-0.19, homogeneous mixture of oligoethoxysiloxanes "Etilsilikat-40" 0.046-0.061, water 29.828-27.659. The cellulose fibers freeness is 30-35°SR, the metakaolin hydraulic activity is not less than 1,200 mg/g.
EFFECT: increasing the mixture setting time, imparting the self-sealing ability, increasing the ultimate strength, increasing the water resistance and frost resistance, simplifying the production.
2 tbl
| Title | Year | Author | Number |
|---|---|---|---|
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|
RU2619618C1 |
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| METHOD TO PREPARE GYPSUM CEMENT POZZOLAN BINDER | 2014 |
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RU2551176C1 |
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|
RU2551179C1 |
