TY JOUR TI Evaluation of the photocatalytic activity of concrete KW photocatalytic properties KW self-cleaning KW titanium dioxide KW organic pigment KW ultraviolet radiation JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Krushel'nickaya, E.A. PY 2021 IS 6 PB Belgorod State Technological University named after V.G. Shukhov