It's true that hydraulic cements (eg Portland cement) harden by a different mechanism, but they too will fully carbonatate over time. https://www.astm.org/DIGI

It's true that hydraulic cements (eg Portland cement) harden by a different mechanism, but they too will fully carbonatate over time. https://www.astm.org/DIGITAL_LIBRARY/STP/PAGES/STP39460S.htm https://www.astm.org/DIGITAL_LIBRARY/STP/PAGES/STP39460S.htm https://nvlpubs.nist.gov/nistpubs/jres/60/jresv60n5p441_A1b.pdf https://nvlpubs.nist.gov/nistpubs/jres/60/jresv60n5p441_A1b.... https://en.wikipedia.org/wiki/Carbonatation https://en.wikipedia.org/wiki/Carbonatation