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Carbon dioxide (CO 2) plays a significant and multifaceted role in the context of cement and concrete, particularly with respect to carbonation and the emerging technology of carbon capture and utilization (CCU). In the concrete industry, carbonation is a natural process where CO 2 reacts with calcium hydroxide in the concrete to form calcium carbonate. This process can affect the properties of concrete in various ways, potentially enhancing its strength but also lowering the alkalinity, which can impact the durability of steel reinforcement. Additionally, the use of CO 2 in CCU practices involves injecting CO 2 into concrete to improve its mechanical properties and to lock away CO 2, thus reducing the overall carbon footprint of the material.

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Carbon Dioxide (CO 2)

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  • 发表日期：

    2025年

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摘要

Carbon dioxide (CO 2) plays a significant and multifaceted role in the context of cement and concrete, particularly with respect to carbonation and the emerging technology of carbon capture and utilization (CCU). In the concrete industry, carbonation is a natural process where CO 2 reacts with calcium hydroxide in the concrete to form calcium carbonate. This process can affect the properties of concrete in various ways, potentially enhancing its strength but also lowering the alkalinity, which can impact the durability of steel reinforcement. Additionally, the use of CO 2 in CCU practices involves injecting CO 2 into concrete to improve its mechanical properties and to lock away CO 2, thus reducing the overall carbon footprint of the material.