TY JOUR TI INVESTIGATION OF THE POZZOLAN ACTIVITY OF A HIGHLY DISPERSED WOLLASTONITE ADDITIVE KW pozzolan activity KW the Frantini method KW wollastonite KW highly dispersed additive KW fine-grained concrete JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Lukuttsova, N.P. AU Karpikov, E.G. AU Pykin, A.A. AU Panov, D.M. PY 2024 IS 9 PB Belgorod State Technological University named after V.G. Shukhov