FIELD: manufacture of building materials. SUBSTANCE: invention relates to applying side products from gas release treatment to produce building gravel. Raw mix for preparing haydite comprises clay (99.20-99.32 wt %) and organic additive - product formed when absorbing by sodium hypochlorite vinyl chloride contained in gas release waste water (0.68-0.80 wt % on conversion to 100% substance). EFFECT: reduced cost due to utilizing waste. 2 tbl
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