Aiming at the problem of the fire resistance performance of the filling material of core board of fire-resistant door,α-hemihydrate gypsum was used as the modifier of magnesium oxysulfide cement,sulfate heptahydrate∶light burned magnesia∶alpha half water gypsum quality ratio of 1∶2∶2,and water paste mass ratio of 1,through the fire stability test,the compressive strength test and combustion heat value test,the changes in fire resistance of inorganic coated polystyrene(PS) core boards of fire-resistant door with the densities respectively 300kg/m3,350kg/m3,400kg/m3,450kg/m3,500kg/m3 were researched.The results shown that the compressive strength loss rate of the inorganic coated PS material increased with the increase of the density,The fire resistance time and the combustion heat value decreased with the increase of the density.The inorganic coated PS material met the fire resistance performance standard of the fire door core board,and provided new way for the fire door core board filling material.
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基金资助
国家重点研发计划(2018YFC0807900);教育部长江学者和创新团队发展计划项目(IRT0618)
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