Graphene's cousin, carbon nanotubes, have been touted as a concrete-strengthening additive for some time now[1], but the downside seems to be that corrosion sensitivity is increased.[2] Curious to see whether graphene would really be immune to that as is claimed.

"And when, eventually, these things do reach the ends of their lives, if the graphene can be recovered and used again it would be a welcome boost to building a circular economy."

This just sounds silly/unfeasible.

[1] https://www.frontiersin.org/articles/10.3389/fmats.2022.8616... [2] https://www.nature.com/articles/s41598-019-42761-2