RU2021103868A - RAW MIXTURE FOR MANUFACTURING LARGE FORMAT FIRE PROTECTIVE PLATE AND METHOD FOR MANUFACTURING LARGE FORMAT FIRE PROTECTIVE PLATE ON THE BASIS OF THIS MIXTURE - Google Patents

Claims (9)

1. The raw mix for the manufacture of a large-format fire-resistant board, including as aggregates unbaked siliceous rock with a particle size of <100 microns, Portland cement, basalt fiber, characterized in that Portland cement is used as the main substance of the mixture, also contains mixing water, a lightweight aggregate from the group silica-aluminate rocks with a particle size of 0.5-1.5 mm and a volume weight of 40 - 60 kg / m ³ , a lightweight aggregate from the group of hydromicas with a particle size of 1-3 mm and a volume weight of 120-150 kg / m ³ , hydrated lime, a flame retardant, an additive that accelerates the hardening of Portland cement, an air-entraining additive, a plasticizing additive, as well as a mixture of mineral and organic fibers: basalt fiber, mulite fiber, polypropylene fiber, selected in a ratio of 2: 10: 2.5, respectively, in the following ratio of components, wt .%: Portland cement 38-50 unbaked siliceous rock with particle size <100 µm 1.5-3 lightweight filler from the group of silica-aluminate rocks with a particle size of 0.5-1.5 mm and a bulk density of 40-60 kg/m ³ 1.5-3 lightweight filler from the group of hydromicas with a particle size of 1-3 mm and a bulk density of 120-150 kg / m ³ 5-8 hydrated lime 2-7 mixture of mineral and organic fibers 1.5-2.5 flame retardant (sodium tetraborate) 0.2-0.5 hardening agent for portland cement 1-2 air-entraining agent 0.01-0.05 plasticizer 0.01-1 mixing water rest 2. Raw mixture according to claim 1, characterized in that Portland cement is used as an inorganic binder-Portland cement without additives, or as Portland slag cement, or as Portland cement with pozzolanic additives, or as the described mixtures based on Portland cement. 3. Raw mixture according to claim 1, characterized in that diatomite, or zeolite, or flask, or tuff, or volcanic ash is used as the unburned siliceous rock. 4. Raw mixture according to claim 1, characterized in that sodium alpha-olefin sulfonate is used as an air-entraining additive. 5. A method of manufacturing a large-format fire-retardant board based on the mixture according to claim 1, in which the plate is obtained by mixing the above-described components of the mixture with water, mixing in a forced-type mixer and forming in molds by vibration casting; hardening of the mixture is carried out in the chamber of heat and moisture treatment. 6. The method according to claim 5, characterized in that after preparing the concrete solution in a forced-type mixer, by means of mixing the components with water, the finished solution is unloaded into a mold with a size of 1240 × 2040 mm through an intermediate hopper. 7. The method according to claim 5, characterized in that the process of setting and hardening the solution is carried out in cassettes of 9 forms assembled on top of each other, then the cassettes are disassembled, and the plates are sent for additional drying. 8. The method according to p. 5, characterized in that the concrete hardening process is maintained for at least 10 days from the moment of pouring.