Use of Carbon Dioxide in Making Carbonate-Bond Precast Concrete Products

McGill University

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Montreal, QC

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Carbonation in the cement of concrete products is readily available. McGill’s process builds on that process and uses CO2 to produce an artificial aggregate to be used in the concrete. Because of the unique properties of carbonated concrete, the end product is stronger and more durable than traditional concrete products. This process can be deployed anywhere, and will contribute to the global reduction of CO2 emissions.

McGill’s process uses an advanced self-concentrating absorption process to produce a low-cost CO2. This CO2 will be collected and converted into calcium carbonates and carbonate bond aggregates for use in concrete products. The process is similar to existing precast concrete production methods but both the cement binder, as well as the aggregates, are carbonated with sequestered CO2 in the process developed by McGill.