Concrete is the most abundant substance on Earth after water. But concrete has a serious emissions problem because its key ingredient has always been cement, the production of which accounts for 10% of the world’s CO2 emissions. Together, Harsco Environmental and CarbiCrete are changing that.
CarbiCrete’s technology makes it possible to produce concrete without using any cement. The patented process, which can be implemented in any concrete plant, involves replacing cement in the concrete mix with steel slag and then injecting the wet concrete with carbon dioxide in order to cure it, giving it its strength.
As a result, any product made using CarbiCrete technology permanently sequesters CO2, while turning an industrial by-product into a high-quality construction product. The process avoids the GHG emissions associated with cement production—about 2kg of CO2 per standard-size concrete block, and because more CO2 is consumed than emitted during using this method, the process is carbon-negative.
Concrete made in this way meets the same specifications as cement-based concrete, has lower material costs, possesses better mechanical and durability properties and reduces concrete makers’ carbon footprint.
In short, it’s better, stronger and more environmental.