FIELD: chemistry.
SUBSTANCE: present invention concerns cement concrete composition for manufacturing building constructions sustaining low natural radioactive background. The cement concrete includes, in mass %: portland cement 15-17, fine-ground dolomite 4-7, hornblendite sand 17-22, hornblendite chip of 5-20 mm fraction 45-49, plastification additive 0.25-0.3 of cement mass units in dry substance equivalent, the rest being water. Plastification additive can be industrial lignosulfonate.
EFFECT: obtaining cement concrete with low natural radioactivity without deterioration of its physical and mechanical properties.
2 cl, 3 tbl
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SU1604786A1 |
