FIELD: manufacture of building materials. SUBSTANCE: raw mixture includes the following ingredients, % by weight: loamy clay 10-30; metallic hydroxide slag 10-20 and milled cullet 60-70. The characterization of the resulting lightweight aggregate is as follows: bulk weight 310-420 kg/m3, compressive strength 1.2-7.8 MPa, water adsorption 4.8- 6.8 % by weight. The heat treatment of such aggregate is carried out at 740-800 C for 8-10 min. EFFECT: high refractoriness under load. 2 tbl
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