СТРУКТУРОУТВОРЕННЯ ШЛАКОПОРТЛАНДЦЕМЕНТНИХ В’ЯЖУЧИХ СИСТЕМ, МОДИФІКОВАНИХ ЛУЖНИМИ СПОЛУКАМИ ТА ПЛАСТИФІКУЮЧИМИ ДОБАВКАМИ РІЗНИХ ТИПІВ

Abstract

The processes of structure formation of slag cement binders modified with alkaline compounds and plasticizing admixtures were researched. It was found that activation of slag cement with alkaline component in complex with plasticizing admixtures leads to directed synthesis of low-basic calcium hydrosilicates, pictose, aflite, scoutite and a small amount of calcium chondrodite. At the same time, as the results of thermoporametry measuring, the pore structure changes: the content of gel pores increases and, accordingly, the share of capillary pores decreases. The formation of such a microstructure of modified slag cement promotes the formation of cement stone with improved strength characteristics, which exceed the level of 29,0 MPa for the 2nd day, 43,5 MPa for the seventh day and 61,0 MPa for 28 days.