Fireproof door core board and a preparation method thereof

Abstract

The invention relates to the field of building products, and in particular to a fireproof door core board and a preparation method thereof. The fire door core board is prepared from sulfur magnesium oxychloride foam cement, which contains by weight 100 parts of magnesium sulfate, 50-200 parts of magnesium oxide, 0 -500 parts of a filler, 30-350 parts of water, and 8-50 parts of a foaming agent; and the sulfur magnesium oxychloride foam cement also contains an admixture accounting for 0.1-5 wt% of the sulfur magnesium oxychloride foam cement. The fireproof door core board is prepared by using the sulfur magnesium oxychloride cement as the material, and the prepared fireproof door core board has excellent comprehensive performances, such as fire prevention, thermal conductivity, density, compressive strength, bending strength, water absorption, shrinkage, and light weight.

Description

technical field [0001] The invention relates to the field of building products, in particular to a fire door core board and a preparation method thereof. Background technique [0002] At present, with the development of the national real estate industry, the demand for fireproof building materials is getting wider and higher, and the requirements are getting higher and higher. Fire doors have multiple functions and practicability such as closure, fire protection, partition, safety, heat preservation, and sound insulation. The main materials of the fire door core are rock wool, glass magnesium board, perlite board, foamed cement board, etc. These inorganic materials are generally prone to defects such as low slag strength, low impact, and easy peeling off. In addition, because most of the materials used contain organic matter, The fire performance is reduced, and the toxicity of the smoke produced does not meet the standard. [0003] There are mainly two types of fire door ...

AI Technical Summary

Problems solved by technology

The main materials of the fire door core are rock wool, glass magnesium board, perlite board, foamed cement board, etc. These inorganic materials are generally prone to defects such as low slag strength, low impact, and easy peeling off. In addition, because most of the materials used contain organic matter, Decrease the fireproof performance, and the toxicity of smoke production does not meet the standard

[0003] There are mainly two types of fire door core panels used in China. The first one uses sodium silicate as a binder and expanded perlite as a filler. After mixing, it is made by high-temperature hot-pressing process, which requires a high temperature of 200-300°C. Hot pressing, long production cycle, low production efficiency, high cost, and the production process will pollute the environment

The second type uses magnesium chloride as a binder to prepare the perlite fire door core board, but it will go back to halogen, and the magnesium chloride will decompose into chloride ion and magnesium ion, forming a weakly acidic primary battery, causing the steel door board to corrode and rust , In addition, the chlorine gas produced by high-temperature open flame combustion is highly toxic. Even if coated steel plates, such as galvanized steel plates, will corrode from keyholes, hinges, skeletons, solder joints, and scratches during operation, especially in humid southern regions

Patent CN104761279A discloses a carbon fiber magnesium oxysulfide cement foamed fireproof door core board and its production method, which uses magnesium oxide, magnesium sulfate solution, desulfurized gypsum, ultrafine carbon fiber, primary fly ash, acidic additives, and foaming agent as The raw material is stirred into a slurry, poured into a mold, demoulded after curing in the curing kiln, and the slab is cured in the curing furnace with moisture control and temperature control after demoulding. The obtained fire door core board is environmentally friendly, light in weight, high in strength, The cost is low, and it meets the requirements of fire prevention, combustibility and safety, but the process is complex and the maintenance requirements are strict

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