Effect of Calcareous Fly-ash Processing Methods on Rheological Properties of Mortars

  • Jacek Gołaszewski
  • Zbigniew Giergiczny
  • Tomasz Ponikiewski
  • Aleksandra Kostrzanowska-Siedlarz
  • Patrycja Miera


The paper presents the results of research into the influence of calcareous fly ash (CFA) processing methods on the rheological properties of mortars. The study consisted of a comparison of changes of the rheological properties (plastic viscosity and yield value) of the mortars during 90 minutes when CFA, unprocessed or processed by grinding, grain separation, or selective collection from the filter, was used as a substitute for a part of the cement. The results show that processing of CFA decreases its negative influence on the rheological properties; the efficient methods are separation or grinding, while the effect of selective collection is almost insignificant.

Keywords: calcareous fly ash, rheological properties, fly ash processing methods, cement mortars, workability
Published online
How to Cite
Gołaszewski, J., Giergiczny, Z., Ponikiewski, T., Kostrzanowska-Siedlarz, A., Miera, P. “Effect of Calcareous Fly-ash Processing Methods on Rheological Properties of Mortars”, Periodica Polytechnica Civil Engineering, 62(3), pp. 643-652, 2018. https://doi.org/10.3311/PPci.11038
Research Article