The steps in CarbiCrete’s process are identical to those of conventional concrete making, with a few key differences.
With cement-based concrete, the first step involves mixing cement with aggregate and water. With CarbiCrete, cement is replaced with steel slag, which is mixed with the other materials using standard equipment.
The mix is then poured into a conventional block-making machine where the CMUs are formed.
In order to cure the concrete, it must be placed into a specialized absorption chamber into which CO2 is injected. Within 24 hours, the concrete has reached full-strength.
Our patented curing process involves the injection of CO2 into an absorption chamber where it reacts with the steel slag within the fresh concrete. During the carbonation process, the CO2 is permanently captured and converted into stable calcium carbonates, filling the voids of the matrix to form a dense structure and giving the concrete its strength.
When compared cement-based CMUs, CarbiCrete CMUs exhibit equivalent or better mechanical and durability properties. They have the same water absorption properties, but higher compressive strength by up to 30% and display better freeze/thaw resistance.
Validating CarbiCrete’s net carbon negative impact involves performing an industry standard Lifecycle Analysis (LCA). Our third-party LCA methodology starts with a 100% reduction of the carbon dioxide emissions from eliminating cement use in concrete. It drives net negative emissions with the permanent sequestration of carbon dioxide that is mineralized in the product curing. Even when additional transportation and conversion impacts are considered, CarbiCrete’s full LCA results in net carbon-negative concrete products a wide range of products and customer.
Implementing CarbiCrete technology in your precast facility is winning proposition for you, your community and the environment. Learn about how CarbiCrete can help you lower your costs and your carbon footprint.