TY JOUR TI Investigation of vapour permeability of films based on mastics of different composition KW mastic composites KW compositions KW curing KW vapour permeability of films KW layer thickness KW cement-sand mixture JO Smart composite in construction AU Dobrokhotov, V.B. AU Egorov, E.S. PY 2025 IS 6 PB Yaroslavl State Technical University