Behaviour of calcined gypsum-based materials during setting

International Conference Building Materials, Products and Technologies

材料科学;工业技术（总论）

Dolezelova, M.^1 ; Jerman, M.^1 ; Vimmrova, A.^1

Department of Materials Engineering and Chemistry, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, Prague

16629, Czech Republic^1

关键词: Calcium sulphate;    Early age;    Hydration heat;    Isothermal calorimetry;    Volume change;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/583/1/012034/pdf
DOI  :  10.1088/1757-899X/583/1/012034

来源: IOP

【 摘 要 】

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.