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- W2742296902 abstract "The contribution reports on durability-related transport properties of geopolymer-based mortars. We show results of accelerated carbonation, rapid chloride migration (RCM), accelerated chloride diffusion, and air permeability measurements for fly ash-based geopolymer mortars, including mixes containing ground granulated blast furnace slag (GGBFS). In addition, we report polarization resistance data and corrosion potential vs. time curves for carbon steel bars embedded in two of the fly ash-based geopolymer mortars and a CEM I-based mortar (as reference).Despite comparable total porosities, the carbonation depths, the chloride migration coefficients and the air permeabilities of the mortars differed significantly. In general, the addition of GGBFS to the binders improved the performance (decreased transport coefficients); however, this was not found to be true for the air permeability in all cases. This latter effect can be explained by drying damage of the C-(A-)S-H gel in GGBFS-containing binders. On the other hand, low transport coefficients can also be achieved by optimization of the binder formulation without the addition of GGBFS, which is also reflected in the material’s air permeability.The corrosion potential vs. time curves in combination with polarization resistance values reveal that the steel reinforcement in geopolymer mortars assumed a passive state. However, this happened considerably later than for steel in CEM I-based mortars. The free corrosion potential of carbon steel reinforcement in the geopolymer mortars had different values than the free corrosion potential values for the CEM I-based mortar for both the active and the passive state." @default.
- W2742296902 created "2017-08-17" @default.
- W2742296902 creator A5001152856 @default.
- W2742296902 date "2017-01-01" @default.
- W2742296902 modified "2023-09-28" @default.
- W2742296902 title "Corrosion of steel in geopolymer mortars" @default.
- W2742296902 hasPublicationYear "2017" @default.
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