建設技術によりセメント・鉄鋼由来のCO₂排出を大幅削減可能（Construction tech could reduce emissions while supporting growth）

2026-05-04 スイス連邦工科大学ローザンヌ校（EPFL）

LMC EPFL CC BY SA

＜関連情報＞

• https://actu.epfl.ch/news/construction-tech-could-reduce-emissions-while-s-3/
• https://www.nature.com/articles/s41467-025-67489-8

開発を促進し、建設の脱炭素化を実現するために、最先端技術をタイムリーに導入する Timely deployment of best-in-class technologies to enable development and decarbonise construction

Cyrille Dunant,Hisham Hafez,Alastair T. M. Marsh,Sabbie A. Miller,Martin Röck,Wolfram Schmidt,Karen L. Scrivener & Franco Zunino
Nature Communications  Published:24 December 2025
DOI:https://doi.org/10.1038/s41467-025-67489-8

Abstract

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.