Open AccessBehaviour of calcined gypsum-based materials during setting
Author(s) -
Magdaléna Doleželová,
Miloš Jerman,
Alena Vimmrová
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/583/1/012034
Subject(s) - gypsum , calcination , materials science , pozzolan , lime , ternary operation , isothermal titration calorimetry , isothermal process , mineralogy , cement , metallurgy , composite material , chemical engineering , portland cement , thermodynamics , chemistry , organic chemistry , physics , computer science , engineering , programming language , catalysis
The behaviour at early age of several composed gypsum-based materials was investigated. The binary binder, composed of calcium sulphate hemihydrate and slaked lime, several ternary binders with different types of pozzolans were prepared, and their behaviour during setting was studied. Unrestrained volume changes of calcium sulphate-based pasts were measured by displacement of liquid, in which the specimens were submerged. The hydration heat of composed binders was measured by isothermal calorimetry. The behaviour of composed materials with different types of pozzolans was compared with the behaviour of calcined gypsum.