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<p>In the face of two apparently irreconcilable global challenges - housing a growing world population and reducing CO<sub>2</sub> emissions - we analyse the current, historic and forecast data on the use of construction materials. Today, cement-based materials make up around three quarters of materials used by mass. Historically, we see that cement-based materials use goes through a peak as Gross Domestic Product per capita increases and then falls. This peak of cement use has been particularly pronounced in China, but is now on a downwards path. From now to 2050, three quarters of construction materials demand will be in low- and middle-income countries. We estimate that adopting the best available construction technologies could reduce CO<sub>2</sub> emissions by about 73% compared to business as usual by 2050. In low- and middle-income countries, the housing and infrastructure needed to achieve the Sustainable Development Goals could be supplied while simultaneously reducing their per capita CO<sub>2</sub> emissions from structural materials.</p>

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Timely deployment of best-in-class technologies to enable development and decarbonise construction

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年12月24日

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  • Cyrille Dunant,
  • Hisham Hafez,
  • Alastair T. M. Marsh,
  • Sabbie A. Miller,
  • Martin Röck,
  • Wolfram Schmidt,
  • Karen L. Scrivener,
  • Franco Zunino

摘要

In the face of two apparently irreconcilable global challenges - housing a growing world population and reducing CO2 emissions - we analyse the current, historic and forecast data on the use of construction materials. Today, cement-based materials make up around three quarters of materials used by mass. Historically, we see that cement-based materials use goes through a peak as Gross Domestic Product per capita increases and then falls. This peak of cement use has been particularly pronounced in China, but is now on a downwards path. From now to 2050, three quarters of construction materials demand will be in low- and middle-income countries. We estimate that adopting the best available construction technologies could reduce CO2 emissions by about 73% compared to business as usual by 2050. In low- and middle-income countries, the housing and infrastructure needed to achieve the Sustainable Development Goals could be supplied while simultaneously reducing their per capita CO2 emissions from structural materials.