Comparative study of the mineralogical phase composition and particle morphology of fly ash and phosphogypsum
Session
Civil Engineering, Infrastructure and Environment
Description
The mineralogical phase composition and particle morphology of fly ash and phosphogypsum vary depending on the region source, surface properties, and plant performance. However, very limited studies on the mineralogy and morphology of South African fly ash and phosphogypsum have been conducted. The present study comparatively investigates the particle morphology and mineralogical phase composition of South African fly ash (FA) and phosphogypsum (PG) in unary form. X-ray Diffractometer (XRD) and Scanning Electron Microscope fitted with an Energy-Dispersive X-ray Spectrometer (SEM-EDS) were used to examine the mineralogical phase composition and particle morphology. The findings show that the main mineral phases of the FA are mullite (Al4.68 Si1.2 O9.6) and quartz (SiO2), and that of PG is gypsum (CaSO4.2H2O). Phosphogypsum has a well–defined rhombic and hexagonal dense crystalline structure while fly ash has smooth round and spherical-shaped glassy particles. The waste materials (FA and PG) are chemically reactive for use to produce cementitious products. This study discovers valuable metals and oxides in fly ash and phosphogypsum with potential benefits for sustainable construction applications.
Keywords:
Composite, microstructure, materials characterization, recycled waste, spectroscopy
Proceedings Editor
Edmond Hajrizi
ISBN
978-9951-550-95-6
Location
UBT Lipjan, Kosovo
Start Date
28-10-2023 8:00 AM
End Date
29-10-2023 6:00 PM
DOI
10.33107/ubt-ic.2023.364
Recommended Citation
Matsimbe, Jabulani; Dikan, Megersa; Olukanni, David; and Musonda, Innocent, "Comparative study of the mineralogical phase composition and particle morphology of fly ash and phosphogypsum" (2023). UBT International Conference. 28.
https://knowledgecenter.ubt-uni.net/conference/IC/civil/28
Comparative study of the mineralogical phase composition and particle morphology of fly ash and phosphogypsum
UBT Lipjan, Kosovo
The mineralogical phase composition and particle morphology of fly ash and phosphogypsum vary depending on the region source, surface properties, and plant performance. However, very limited studies on the mineralogy and morphology of South African fly ash and phosphogypsum have been conducted. The present study comparatively investigates the particle morphology and mineralogical phase composition of South African fly ash (FA) and phosphogypsum (PG) in unary form. X-ray Diffractometer (XRD) and Scanning Electron Microscope fitted with an Energy-Dispersive X-ray Spectrometer (SEM-EDS) were used to examine the mineralogical phase composition and particle morphology. The findings show that the main mineral phases of the FA are mullite (Al4.68 Si1.2 O9.6) and quartz (SiO2), and that of PG is gypsum (CaSO4.2H2O). Phosphogypsum has a well–defined rhombic and hexagonal dense crystalline structure while fly ash has smooth round and spherical-shaped glassy particles. The waste materials (FA and PG) are chemically reactive for use to produce cementitious products. This study discovers valuable metals and oxides in fly ash and phosphogypsum with potential benefits for sustainable construction applications.