TY JOUR TI Hardening of cement stone with microfine additives KW cement KW microfine additives KW hydration KW hardening KW strength JO Technique and technology of silicates AU Krivoborodov, Y.R. AU Elenina, A.A. PY 2015 IS 22 PB Individual Entrepreneur Svetlana Vasilievna Samchenko