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

Shah, Izhar Hussain; Miller, Sabbie A.; Jiang, Daqian; Myers, Rupert J.

doi:10.1038/s41467-022-33289-7

articleNature CommunicationsSep 30, 2022GOLD OA

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

IHIzhar Hussain Shah SASabbie A. Miller DJDaqian Jiang RJRupert J. Myers

Imperial College London · University of California, Davis · +1 more institution

PubMed

Indexed incrossrefdoajpubmed

Abstract

Abstract Population and development megatrends will drive growth in cement production, which is already one of the most challenging-to-mitigate sources of CO 2 emissions. However, availabilities of conventional secondary cementitious materials (CMs) like fly ash are declining. Here, we present detailed generation rates of secondary CMs worldwide between 2002 and 2018, showing the potential for 3.5 Gt to be generated in 2018. Maximal substitution of Portland cement clinker with these materials could have avoided up to 1.3 Gt CO 2 -eq. emissions (~44% of cement production and ~2.8% of anthropogenic CO 2 -eq. emissions) in 2018. We also show that nearly all of the highest cement producing nations can locally…

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Topics & keywords

Topics

Keywords

Portland cement
Clinker (cement)
Cement
Cementitious
Environmental science
Fly ash
Waste management
Production (economics)

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