Researchers at ASU have discovered a method of combining iron and CO2 byproducts to produce a new binding matrix for concrete. Production of conventional binding materials also produces large amounts of greenhouse gas (GHG) emissions. This new process, using a chemical reaction between metallic iron and aqueous CO2, produces no GHGs. Sequestering CO2 by chemically binding it to iron ensures it cannot escape back into the environment. Since the input materials are waste products from other industrial processes, this method is more cost effective than standard techniques. The binding material has properties comparable to traditional concrete without the harmful byproducts. Altering the exact ratio of the chemical reactants also allows exact physical properties, such as density, to be fine-tuned for manufacturing specifications. As the United States, and the world, works toward implementation of sustainable industrial ecosystem practices, processes such as this will put companies ahead of the curve.
- Ecofriendly alternative to cement
- Building and Infrastructure
- Construction Industry
- Chemical CO2 sequestration
- Landfill size reduction through elimination of a major source of manufacturing process waste
Benefits and Advantages
- Public Image - Use of ecofriendly techniques improves public perception.
- Low Cost - Easily integrated into existing processes.
- Sustainability - Uses ecofriendly industrial processes to sequester CO2.
- Energy Conservation - Reaction occurs at ambient temperatures, minimizing necessary additional energy input.
- Industrial Ecology - Waste iron and CO2 from other processes is recycled directly into the process stream.
- Fiscally Responsible - All input materials are waste products from other processes, making them low cost and environmentally friendly.
- Flexibility - Physical properties such as density of the final binding material can be tailored to specification.
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