TY JOUR TI STATISTICAL QUALITY ANALYSIS OF THE RUSSIAN CEMENT KW Portland cement KW statistical processing of quality data KW specified tolerance KW process capability index KW fraction nonconforming JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Pospelova, E.A. AU Chernositova , E.. AU Lazarev, E.V. PY 2017 IS 2 PB Belgorod State Technological University named after V.G. Shukhov