This paper presents the results of chemical resistance of mortars made of blended cements with addition of calcareous fly ash. The test results showed that using calcareous fly ash as a cement constituent exerted a positive influence on sulphate resistance and chloride permeability, whereas carbonation resistance decreased with increasing amount of calcareous fly ash. Mechanical activation (grinding) and/or higher addition of calcareous fly ash in cement composition increased fly ash activity, which influenced positively the resistance to chemical attack. Portland-composite cements CEM II where the calcareous fly ash and granulated blast furnace slag were applied together, showed the highest resistance against all types of chemical corrosion.
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Dąbrowska et al. (2014) studied this question.