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dc.contributor.authorGuo, Rui
dc.contributor.authorWang, Jiaoyue
dc.contributor.authorBing, Longfei
dc.contributor.authorTong, Dan
dc.contributor.authorCiais, Philippe
dc.contributor.authorDavis, Steven J.
dc.contributor.authorAndrew, Robbie
dc.contributor.authorXi, Fengming
dc.contributor.authorLiu, Zhu
dc.date.accessioned2022-01-27T13:04:45Z
dc.date.available2022-01-27T13:04:45Z
dc.date.created2022-01-18T17:10:18Z
dc.date.issued2021
dc.identifier.citationEarth System Science Data. 2021, 13 (4), 1791-1805.en_US
dc.identifier.issn1866-3508
dc.identifier.urihttps://hdl.handle.net/11250/2889601
dc.description.abstractBecause of the alkaline nature and high calcium content of cements in general, they serve as a CO2- absorbing agent through carbonation processes, resembling silicate weathering in nature. This carbon uptake capacity of cements could abate some of the CO2 emitted during their production. Given the scale of cement production worldwide (4.10 Gt in 2019), a life-cycle assessment is necessary to determine the actual net carbon impacts of this industry. We adopted a comprehensive analytical model to estimate the amount of CO2 that had been absorbed from 1930 to 2019 in four types of cement materials, including concrete, mortar, construction waste, and cement kiln dust (CKD). In addition, the process CO2 emission during the same period based on the same datasets was also estimated. The results show that 21.02 Gt CO2 (95 % confidence interval, CI: 18.01– 24.41 Gt CO2) had been absorbed in the cements produced from 1930 to 2019, with the 2019 annual figure mounting up to 0.89 Gt CO2 yr−1 (95 % CI: 0.76–1.06 Gt CO2). The cumulative uptake is equivalent to approximately 55 % of the process emission based on our estimation. In particular, China’s dominant position in cement production or consumption in recent decades also gives rise to its uptake being the greatest, with a cumulative sink of 6.21 Gt CO2 (95 % CI: 4.59–8.32 Gt CO2) since 1930. Among the four types of cement materials, mortar is estimated to be the greatest contributor (approximately 59 %) to the total uptake. Potentially, our cement emission and uptake estimation system can be updated annually and modified when necessary for future low-carbon transitions in the cement industry. All the data described in this study, including the Monte Carlo uncertainty analysis results, are accessible at https://doi.org/10.5281/zenodo.4459729 (Wang et al., 2021).en_US
dc.language.isoengen_US
dc.publisherCopernicus publicationsen_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no*
dc.titleGlobal CO2 uptake by cement from 1930 to 2019en_US
dc.typeJournal articleen_US
dc.typePeer revieweden_US
dc.description.versionpublishedVersionen_US
dc.source.pagenumber1791-1805en_US
dc.source.volume13en_US
dc.source.journalEarth System Science Dataen_US
dc.source.issue4en_US
dc.identifier.doi10.5194/essd-13-1791-2021
dc.identifier.cristin1983978
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1


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Navngivelse 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Navngivelse 4.0 Internasjonal