<p>Addressing the urgent need to mitigate climate change in the construction industry is crucial. This paper critically examines carbon-capturing concrete (CCC) as a viable strategy for reducing the sector’s substantial CO<sub>2</sub> emissions. It begins by highlighting the significant carbon footprint of cement production, particularly the role of clinker manufacturing in global CO<sub>2</sub> emissions. A bibliometric analysis reveals a strong and expanding research landscape over the past 25&#xa0;years, progressing from initial concept development to rapid growth and recent advancements. International collaboration was identified as prominent approach, especially among researchers in the United States, China, the United Kingdom, and Norway, underscoring the multidisciplinary nature of CCC research. However, this is not the case for researchers from South America and Africa with low research output in this domain. Critical review of empirical studies demonstrate that carbonation enhances early-age strength and, under optimized conditions, improves long-term mechanical performance while sequestering substantial amounts of CO<sub>2</sub>. Current CCC implementation methods include advanced techniques such as amine scrubbing, calcium looping, and direct CO<sub>2</sub> injection during curing, with commercial applications already underway by companies like CarbonCure®, CarbiCrete®, and Solidia Technologies®. However, challenges remain, retrofitting cost, scalability, material compatibility, and discrepancies between laboratory and real-world performance. Additionally, common myths about CCC’s efficacy and safety are critically examined and debunked, emphasizing that CCC should be part of a broader decarbonization strategy rather than a standalone solution. Overall, this study advocates for continued technological innovation, supportive regulatory frameworks, and strengthened international cooperation to advance CCC implementation and drive the construction industry toward net-zero emissions.</p>

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Carbon-capturing concrete: current status and future directions for development

  • Abiola Usman Adebanjo,
  • Nasir Shafiq,
  • Olanrewaju Timothy Taiwo,
  • Divine Favour Adejumo,
  • Vicky Kumar,
  • Joseph Oluwamayowa Olutoki,
  • Bhagwan Das,
  • Priyanka Singh,
  • Nura Sheu Aliyu Yaro

摘要

Addressing the urgent need to mitigate climate change in the construction industry is crucial. This paper critically examines carbon-capturing concrete (CCC) as a viable strategy for reducing the sector’s substantial CO2 emissions. It begins by highlighting the significant carbon footprint of cement production, particularly the role of clinker manufacturing in global CO2 emissions. A bibliometric analysis reveals a strong and expanding research landscape over the past 25 years, progressing from initial concept development to rapid growth and recent advancements. International collaboration was identified as prominent approach, especially among researchers in the United States, China, the United Kingdom, and Norway, underscoring the multidisciplinary nature of CCC research. However, this is not the case for researchers from South America and Africa with low research output in this domain. Critical review of empirical studies demonstrate that carbonation enhances early-age strength and, under optimized conditions, improves long-term mechanical performance while sequestering substantial amounts of CO2. Current CCC implementation methods include advanced techniques such as amine scrubbing, calcium looping, and direct CO2 injection during curing, with commercial applications already underway by companies like CarbonCure®, CarbiCrete®, and Solidia Technologies®. However, challenges remain, retrofitting cost, scalability, material compatibility, and discrepancies between laboratory and real-world performance. Additionally, common myths about CCC’s efficacy and safety are critically examined and debunked, emphasizing that CCC should be part of a broader decarbonization strategy rather than a standalone solution. Overall, this study advocates for continued technological innovation, supportive regulatory frameworks, and strengthened international cooperation to advance CCC implementation and drive the construction industry toward net-zero emissions.