FIELD: chemistry.
SUBSTANCE: invention relates to production of large concrete aggregates. The cement lining composition for large aggregate contains the following in wt %: portland cement 60.2-62.8; urea 0.2-0.3; casein adhesive 4.0-6.0; natural and/or synthetic fibre 0.5-1.0; water 30.0-35.0.
EFFECT: increased adhesion of the cement lining for large aggregate to hardened cement paste, reduction of its softening coefficient.
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