TY JOUR TI BENDING AND STRETCHING OF STONE WITH CENTRIC COMPRESSION OF MASONWORK KW masonwork KW building mortar KW masonwork compression KW bending KW structural heterogeneity of mortar JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Donchenko, O.M. AU Degtev, I.A. AU Tarasenko, V.N. PY 2018 IS 3 PB Belgorod State Technological University named after V.G. Shukhov