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AllanfromWales1 t1_je7b3mo wrote

If you pre-carbonate the concrete you are not going to have the alkaline environment which prevents the corrosion of the steel reinforcement in the concrete. That will necessarily lead to expansive corrosion and spalling of the concrete. An approach like this might be effective for mass concrete, with no reinforcement, but that's a very small part of the concrete market.


NevyTheChemist t1_jeaadnj wrote

They talk about that in the article. Apparently their methods solves this.


AllanfromWales1 t1_jeajk7l wrote

Nothing that I read offered a solution. They implied that pre-carbonating gets over the problem of cracking of the concrete as it carbonates, but that isn't a serious issue. Corrosion of reinforcing steel can and does occur in uncracked concrete if the pH is not kept alkaline. The permeability of the concrete to air is ample to allow this. Subsequently cracking occurs because the corrosion products have a higher volume than the steel they replace. The cracking is a result of the corrosion, not the cause of it.


Aromatic_Accident_77 t1_je7inrb wrote

Would gfrc work with this?