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Cement substitution with secondary materials can reduce annual global CO₂ emissions by up to 1.3 gigatons

Engineering and Technology

Cement substitution with secondary materials can reduce annual global CO₂ emissions by up to 1.3 gigatons

I. H. Shah, S. A. Miller, et al.

This insightful study by Izhar Hussain Shah, Sabbie A. Miller, Daqian Jiang, and Rupert J. Myers delves into the potential of secondary cementitious materials to significantly reduce CO₂ emissions in cement production. With a staggering 3.5 Gt generation potential identified in 2018, the researchers advocate for regionally optimized approaches to combat climate change.

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Playback language: English
Abstract
Population and development megatrends will drive growth in cement production, a significant source of CO₂ emissions. This paper analyzes the global generation rates of secondary cementitious materials (CMs) from 2002-2018, revealing a potential for 3.5 Gt generation in 2018. Maximal clinker substitution with these materials could have avoided 1.3 Gt of CO₂-eq emissions. The study highlights the potential for local CM generation and use in most high-cement producing nations, emphasizing the need for regionally optimized CM mixes and systemic approaches to decarbonize the global CM cycle.
Publisher
Nature Communications
Published On
Sep 30, 2022
Authors
Izhar Hussain Shah, Sabbie A. Miller, Daqian Jiang, Rupert J. Myers
Tags
cement production
CO₂ emissions
secondary cementitious materials
clinker substitution
regional optimization

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