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Based on fly ash light-weight cementing composition with high compressive strength and fast setting Invention relates to method of manufacturing fast setting light-weight cementing composition with improved compressive strength for building products such as panels. Method of obtaining light-weight cementing mixture, which has improved compressive strength and resistance to water, includes mixing water, cementing reacting powder, alkali metal salt of citric acid as set accelerator and light-weight filling agent, where weight ratio of water to reacting powder constitutes approximately 0.17-0.35:1.0, reacting powder includes 75-100 wt % of sol dust, which contains at least 50 wt % of fly ash of class C and 0-25 wt % of hydraulic cement and/or gypsum, setting of cementing mixture being achieved within from 4 to 6 minutes of composition mixing without addition of set retarder. Invention also deals with composition for obtaining light-weight cement panel. |
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Raw mixture for manufacture of unshrinkable construction material Raw mix contains industrial gypsum, water and additives in the form of potassium sulfate and sodium chloride, at the following ratio of components, wt %: industrial gypsum 65-70; potassium sulfate 1.4-2.0; sodium chloride 1.5-2.0; water - the rest. |
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Method for manufacture of products from anhydrite Invention is related to method for manufacture of products from anhydrite. In method for products manufacture from anhydrite including preparation of anhydrite mixture with additive that activates its hydration in process of combined crushing, moistening of produced mixture, further moulding and hardening of products, crushing is carried out together with 1-3% of plasticiser down to particle size of less than 80 mcm, and after moistening mixture is additionally exposed to hydromechanical activation for 3-5 minutes. Additive that activates anhydrite hydration may be Portland cement in amount of at least 20%. Moulded products may be dried at 50-70°C for 1-3 hours. On completion of drying products may be repeatedly moistened and dried. |
Another patent 2528603.