From what I've read about carbon-negative cement, idea is not to capture the carbon released during curing, but to make concrete that later, over years, chemica

From what I've read about carbon-negative cement, idea is not to capture the carbon released during curing, but to make concrete that later, over years, chemically reacts and captures the carbon from the air. Because concrete is porous to the depth of 20+ inches, it has a very large surface that can slowly extract more CO2 from air than it initially had released.