15.Ismail, I., Bernal, S.A., Provis, J.L., San Nicolas, R., Brice, D.G., Kilcullen,
A.R., Hamdan, S., and Van Deventer, J.S. J., “Influence of fly ash on the water and
chloride permeability of alkali-activated slag mortars and concretes”, Construction
and Building Materials, Vol.48, 2013, pp.1187-1201.