A study on the contribution of structural concrete to reduce carbon dioxide emissions of the demand side

Abstract The CO 2 emitted by concrete, the main material used in structural concrete, is emitted in various processes in its supply chain. Therefore, reducing CO 2 emissions is not just a matter for the supply side, namely cement and concrete manufacturers, but also concerns the demand side including designers, contractors, and the structure owners. However, how much of the reduction in CO 2 emissions should be shared between the supply and demand sides? In this article, the net zero roadmap for concrete by 2050 published by the GCCA, a Global Cement and Concrete Association, and the National Institute for Environmental Studies in Japan, is analyzed to clarify the contribution of supply and demand sides to the reduction of CO 2 emissions. Furthermore, estimates have been made of the reduction in CO 2 emissions for concrete, which is the main material used in structural concrete, and for reinforcing steel, although data is insufficient. And a proposal is made for the indicators that each member of fib should aim for. This will make it possible to visualize the CO 2 emissions reduction effects that each member organization can show to stakeholders and motivate the development and implementation of new technologies that contribute to low‐carbon and decarbonization.