| 摘要 |
FIELD: construction.SUBSTANCE: invention relates to industry of construction materials, particularly to production of articles from foamed concrete, which can be used as protective shields for insulating building structures from action of high temperatures arising in fires, accidents and failures in operation of process equipment. Crude mixture for making foamed concrete contains, wt%: portland cement 30.0-33.0, foaming agent PB-2000 0.2-0.25, fine aggregate 39.75-48.3, crumbs of foamed polystyrene with particle size of 2-3 mm and bulk density of 12-15 kg/m1.5-2.0, water 20.0-25.0.EFFECT: technical result is increasing heat resistance of foam produced from crude mixture.1 cl, 1 tbl |
