Properties of three newly developed quick cements

Abstract

In CaOSiO 2Al 2O 3Fe 2O 3SO 3CaF 2 systems, three kinds of quick cements from different clinkers were produced (C 3SC 11A 7·CaF 2C 2(A,F), C 11A 7·CaF 2 C 2SC 2(A,F) and C 4A 3SC 2SC 2(A,F)). Blast furnace slag and lime stone were added as interground additives to these quick cements (20% – 50% weight). During the first 2 hours the compressive strengths of the quick cements reached β D,2h = 7–28 N/mm 2 and after 28 days β D,28d = 45–64 N/mm 2. In this paper the formation of cement clinker as well as the hydration behaviour, the development of strength, the pore structure (for a storage in water, in atmosphere and in an atmosphere of 1 vol.−% CO 2; for a temperature of 5°C and 20°C) and the setting process of quick cements, as well as the carbonization of quick cement mortar were investigated and discussed.