Abstract
RO phase in steel slag is form by divalent oxides of magnesium, iron, and manganese. The activity and expansibility of MgO-FeO-MnO solid solution were affected by the content of FeO and MnO, which further affects the application of steel slag in building materials. The micromorphology of MgO-FeO-MnO phase was diverse in different steel slag, and was affected by Fe, Mn content and grain boundary wetting phase transitions. By synthesizing MgO-FeO-MnO solid solution to simulate RO phase, it was found that the hydration activity of the solid solution will increase with the decrease of FeO/MnO, but only up to 23.275% of MgO in MgO-FeO-MnO solid solution can be hydrated. Unhydrated MgO affects the volume stability of steel slag. It is also a hidden danger in the application of steel slag in building materials.
Original language | English |
---|---|
Journal | Materials Letters |
Volume | 273 |
ISSN | 0167-577X |
DOIs | |
Publication status | Published - 2020 |
Externally published | Yes |
Keywords
- Sintering
- Microstructure
- Thermal analysis