wizyta

od 2020-09-20

Title: The role of aluminium ions during the slag activation process

Source: Physics and Chemistry of Glasses European Journal of Glass Science and Technology Part B

Year : 2014

Abstract:

Synthetic glasses with model compositions containing differing amounts of aluminium ions were examined. The model glasses were hydrated under different conditions and with different amounts of NaOH as the activator. X-ray diffraction (XRD), magic angle spinning nuclear magnetic resonance (MAS-NMR), infra-red (IR) spectrometry and strength testing of the hydrated samples was conducted. The heat of hydration was also determined. The composition of glasses is in the gehlenite and anorthite crystal fields. Such glasses are the most popular in industrial slags. Based on the spectroscopic examinations (IR, MAS NMR), it was observed that the aluminium ions are only present in tetrahedral coordination - they are part of the glass network. It was proved that the amount of alumina has significant influence on the hydration process and properties of hardened materials.

   (Pobrane:  aktualizowanie)