TY JOUR TI Determination of the cement gel parameters using pycnometric method KW cement gel KW concrete KW pycnometric method KW density of gel KW singular points KW water-cement ratio JO Technique and technology of silicates AU Gordeev, E.V. AU Zakharova, N.A. AU Indeykin, E.A. PY 2015 IS 22 PB Individual Entrepreneur Svetlana Vasilievna Samchenko