FIELD: construction.
SUBSTANCE: raw mix for making a shell of a bulk filler comprises portland cement, urea, casein glue, water, and additionally includes fly ash and fosta nylon fibre ground into sections of 3-7 mm at the following ratio of components, wt %: portland cement 45.0-51.0; urea 0.7-1.3; casein glue 2.5-3.0; fly ash 21.0-24.0; fosta nylon fibre ground into sections 3-7 mm 0.2-0.3; water 24.0-27.0.
EFFECT: higher strength of shell fixation to surface of a bulk filler.
1 tbl
