Producing concrete without producing CO2 or using water?

Infographic of Portland cement production ending at a 1500°C rotary kiln

https://www.youtube.com/watch?v=MkE-2npiqFc

Portland cement’s rotary kiln near 1,500 °C drives most of concrete’s CO₂ footprint, while curing traditionally consumes large volumes of water.

Carbon-capture aggregates, CO₂-cured low-lime cements, and related chemistries aim to mineralize carbon in the binder or aggregate — cutting net process emissions and, in some systems, replacing water-based curing.

Wednesday March 17th 2021