Synthesis and characterization of belite calcium sulfoaluminate cements produced by oxyfuel combustion residues

Telesca, A. ; Marroccoli, M. ; Ibris, N. ; Naik, T.R. ; Lupiáñez, C. ; Díez, L.I. ; Romeo, L.M. ; Montagnaro, F.

Resumen: In this work, the possibility of reusing ashes issued by an oxyfuel combustion process (OC) as a source of material in the production of belite calcium sulfoaluminate BCSA cements has been investigated. OF process is one of the most promising combustion technologies for CO2 reduction from power plants. Combustion tests were carried out in an oxyfuel bubbling fluidized bed pilot plant. Four BCSA clinker-generating raw mixes were heated in a laboratory electric oven in the temperatures range 1150°-1350°C: one included only natural materials (limestone, clay, bauxite and gypsum), the others contained OC ashes as total substitute for clay. X-ray diffraction (XRD) analysis on the burning products showed high conversion of reactants toward the main BCSA clinker components (C2S and C4A3$), especially at 1200° or 1250°C. Moreover, physical-mechanical tests associated with XRD and differential thermal-thermogravimetric analyses accomplished on all the cements (obtained by adding natural gypsum to the clinkers produced at the best synthesis temperatures) generally displayed a similar hydration behaviour.

Idioma: Inglés

DOI: 10.18552/2019/IDSCMT5116

Año: 2019

Publicado en: Sustainable Construction Materials and Technologies 2 (2019), [13 pp.]
ISSN: 2515-3048

Originalmente disponible en: Texto completo de la revista

Tipo y forma: Article (Published version)