TY JOUR TI COMPARATIVE ANALYSIS OF WATER ABSORPTION AND CLOSED POROSITY OF CELLULAR CONCRETE KW water absorption KW autoclaved gas-ash concrete KW fly ash KW non-autoclaved foam concrete KW microsilica KW closed porosity JO Modern Technologies and Scientific and Technological Progress AU Bugaychuk, V.A. AU Baranova, A.A. PY 2020 IS 2020 PB Federal State Funded Educational Establishment of Higher Education «Angarsk State Technical University»