FIELD: construction.
SUBSTANCE: raw mix for making a shell of a bulk filler comprises portland cement, urea, casein glue, water, and additionally includes ground quartz sand and mineral fibre ground into sections of 3-7 mm at the following ratio of components, wt %: portland cement 41.2-44.0; urea 0.3-0.5; casein glue 4.0-7.0; ground quartz sand 24.0-27.0; mineral fibre ground into sections 3-7 mm 0.3-0.5; water 24.0-27.0.
EFFECT: higher strength of shell fixation to surface of a bulk filler.
2 cl, 1 tbl
