Published: 2020-12-30

The possibility of use of mixture of siliceous and calcareous fly ash for production of Portland-composite cement type CEM II/B-M (V-W) 52.5

Ewelina Tkaczewska

Abstract

The paper analyses the properties of Portland-composite cement CEM II/B-M (V-W) prepared by addition of mixture of siliceous and calcareous fly ashes – in percentage proportion of 20:0, 10:10, 20:10 or 15:15 – to Portland cement CEM I 42.5R. Blaine’s surface area of cements equalled 4000±100 cm2/g. Hydration heat, standard consistency, initial setting time, soundness and compressive strength were analysed in the paper. Partial replacement of siliceous fly ash with calcareous fly ash in cement gives a Portland-composite cement CEM II/B-M (V-W) of strength class 52.5N or even 52.5R, if the percentage proportion of siliceous to calcareous fly ash is 20:10.

Keywords:

compressive strength, fly ash, hydration heat, initial setting time, Portland-composite cement, soundness, standard consistency.

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Tkaczewska, E. (2020). The possibility of use of mixture of siliceous and calcareous fly ash for production of Portland-composite cement type CEM II/B-M (V-W) 52.5. Roads and Bridges - Drogi I Mosty, 19(4), 267–282. https://doi.org/10.7409/rabdim.020.017

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