FIELD: foundry. SUBSTANCE: mixture to be measured is tested for total clay content, humidity, compactibility and wet compressive strength along with diluting the mixture through doping with small portions of fresh sand with each dilution reducing the total amount of the clay content 0.5-1.5 percent by mixture weight. After feeding a sand portion the mixture is thoroughly mixed to obtain the initial value of its loose state parameter. The dilution is completed when the mixture recovers its initial wet compression strength value. The total reduction of the clay content reached by dilution is indicative of the amount of the unmixed clay. EFFECT: increased labor saving.
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