TY JOUR TI THE EFFECT OF TUNGSTEN CARBIDE NANOPOWDER AGGLOMERATES ON THE PROPERTIES OF CEMENT MATERIALS KW cement KW agglomerates KW nanopowder KW tungsten carbide KW compressive strength KW flexural strength KW water demand KW setting time KW structure JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Chayka, T.V. PY 2021 IS 6 PB Belgorod State Technological University named after V.G. Shukhov