It might also turn out that lime for the concrete will become a rate limiting material. Not to mention the energy cost involved in mining both it and creating t

It might also turn out that lime for the concrete will become a rate limiting material. Not to mention the energy cost involved in mining both it and creating the carbon nanopowder. But, a material with similar hydration properties to concrete, a biopolymer for instance, might exist and be made with less cost... We actually have to start thinking about replacing concrete with something else to be more energy efficient and sustainable.