气候变化领域集成服务门户(CCPortal): The role of concrete in life cycle greenhouse gas emissions of US buildings and pavements

CCPortal

DOI	10.1073/pnas.2021936118
	The role of concrete in life cycle greenhouse gas emissions of US buildings and pavements
	Gregory J.; AzariJafari H.; Vahidi E.; Guo F.; Ulm F.-J.; Kirchain R.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:37
英文摘要	Concrete is a critical component of deep decarbonization efforts because of both the scale of the industry and because of how its use impacts the building, transportation, and industrial sectors. We use a bottom-up model of current and future building and pavement stocks and construction in the United States to contextualize the role of concrete in greenhouse gas (GHG) reductions strategies under projected and ambitious scenarios, including embodied and use phases of the structures' life cycle. We show that projected improvements in the building sector result in a reduction of 49% of GHG emissions in 2050 relative to 2016 levels, whereas ambitious improvements result in a 57% reduction in 2050, which is 22.5 Gt cumulative saving. The pavements sector shows a larger difference between the two scenarios with a 14% reduction of GHG emissions for projected improvements and a 65% reduction under the ambitious scenario, which is ~1.35 Gt. This reduction occurs despite the fact that concrete usage in 2050 in the ambitious scenario is over three times that of the projected scenario because of the ways in which concrete lowers use phase emissions. Over 70% of future emissions from new construction are from the use phase. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Buildings; Concrete; Greenhouse gas emissions; Life cycle assessment; Pavements
语种	英语
scopus关键词	article; carbon footprint; life cycle assessment; United States
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/238394
作者单位	Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, United States; Materials Research Laboratory, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
推荐引用方式 GB/T 7714	Gregory J.,AzariJafari H.,Vahidi E.,et al. The role of concrete in life cycle greenhouse gas emissions of US buildings and pavements[J],2021,118(37).
APA	Gregory J.,AzariJafari H.,Vahidi E.,Guo F.,Ulm F.-J.,&Kirchain R..(2021).The role of concrete in life cycle greenhouse gas emissions of US buildings and pavements.Proceedings of the National Academy of Sciences of the United States of America,118(37).
MLA	Gregory J.,et al."The role of concrete in life cycle greenhouse gas emissions of US buildings and pavements".Proceedings of the National Academy of Sciences of the United States of America 118.37(2021).