FIELD: chemistry.
SUBSTANCE: invention relates to the industry of building materials and compositions of crude mixtures for making heat-insulation articles. The crude mixture for making heat-insulation articles contains the following, wt %: non-sintering acid clay 65.7 - 70.5, expanded pearlite ground to specific surface area of 4500 - 5000 cm2/g 20.0 - 24.0, glass fibre cut to 5-30 mm pieces 0.3 - 0.5, kaolin 2.0 - 3.0, quartz sand 6.0 - 8.0.
EFFECT: high water resistance of articles made from the crude mixture.
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