INVESTIGATION OF MASS GRADIENT OF CONCRETE FILLED WITH POLYACRYLAMIDE/Fe3O4 MAGNETITE NANOPARTICLES İN CASPIAN SEA AND FORMATION WATER MEDIUM
S.F. Humbatova, Sh.Z. Tapdyqov, J.E. Guliyeva, A.M. Gulamirov, E.Y. Malikov, S.M. Mammadova, A.A. Fariz, S.Sh. Kazimova