TY JOUR TI High-strength cellular concrete KW cellular concrete KW Portland cement KW mechanical strength KW lime and sulfur mixing KW hydrazine JO Technique and technology of silicates AU Elesin, M.A. AU Berdov, G.I. AU Umnova, E.V. PY 2015 IS 22 PB Individual Entrepreneur Svetlana Vasilievna Samchenko