FIELD: civil engineering. SUBSTANCE: light refractory filler is produced from a mixture of clayey raw material with different degrees of refractoriness, and slag resulting after secondary melting of aluminium in the following proportions of components, wt.-% clay, 75-95; slag, 5-25. Filler is produced by a highly-efficient technology of keramzit production with a maximum burning temperature of 1300-1500 C. EFFECT: utilization of slag waste of aluminium industry. 2 tbl
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