We have conducted two tests in accordance with the chloride resistance of alkali activated slag mortars :RCMT and bulk diffusion.
Two different alkaline activators were investigated : NaOH+Na2SiO3 and KOH+Na2SiO3.
According to the 90 days migration and diffusion coefficients obtained, NaOH mortars performed better, however migration coefficient of NaOH were relatively lower than that of KOH mixtures.
Any ideas about the explanation ?
Warm regards,
may be mercury intrusion porosimetry (mip) or determine porosity based BJH method work well
The results coming from the nt build 492 have to be adjusted to take into account the pore solutions of the alkali activated materials as they only consider the transport of the Cl- ion, I would not rely too much on those results at the present time given the current state of the equation.
Dear Amin,
could you reveal molar ratio of your alkaline liquids and something about mineralogy of slag used for testing?
Sodium or Potassium nature , isn‘t enough to explain why you have these results. Every result depends on how many salts are inside your system , so how many react with slag and which remain free to move . This reactivity changes depending on mineralogy of slag.
Best regards
Alex Reggiani
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