摘要
Carbon dioxide(CO_(2))emissions from the road sector have attracted increasing attention in current years.This paper attempted to provide a systematic review of the existing research efforts on road life-cycle CO_(2)emissions by analyzing the system’s boundary division,identifying the CO_(2)emission contributions of each life-cycle phase,listing major emission contributors,exploring related emission reduction technologies,and giving directions for future development.The research showed that the road life cycle is usually divided into five phases:material production,construction,use,maintenance and end-of-life(EOL)phases.The use phase and the initial construction stage(including material production and construction phases)contributed the most CO_(2)emissions during the road life cycle.In detail,the production of cement,asphalt and steel were the three main emission contributors in the material production phase.The pavement roughness,albedo,and concrete carbonation were the main factors affecting emissions in the use phase.In addition,emission reduction technologies such as using recycled materials and recycling techniques,lowering mixing temperature,and equipment energy substitution were commonly used to reduce emissions from material production and construction phases.The application of emerging technologies such as carbon capture and storage,carbon sink,and the use of hydrogen,solar and photovoltaic in the road sector may have emission reduction potentials and should be highlighted more in future studies.
基金
supported by the National Natural Science Foundation of China(Grant Nos.51878062,52102390 and 52002032)
the Natural Science Foundation of Shaanxi Province(Grant No.2022JQ-527)
the Fundamental Research Funds for the Central Universities(Grant Nos.300102342501 and 300102342517)
作者简介
Nieyangzi Liu,is a PhD student at the College of Transportation Engineering,Chang'an University.She received her master degree in University of Southern California.Her research interests include life-cycle assessment(LCA)for road infrastructure,road carbon emission assessment and mitigation measures,and emissions and fuel consumption of construction equipment,E-mail addresses:liunieyangzi@chd.edu.cn(N.Liu);Yuanqing Wang,Dr.,is a professor at the Department of Traffic Engineering,College of Transportation Engineering,Chang'an University.He attained his doctoral degree in transportation engineering from Chang'an University.His research interests include transportation planning and management,transportation carbon emission assessment,intelligent transportation system,transportation model construction and public transit,E-mail addresses:wyqing@chd.edu.cn(Y.Wang);Corresponding author:Qiang Bai,Dr.,is an associate professor at the College of Transportation Engineering,Chang'an University.He received his PhD degree in civil engineering from Purdue University.His research interests include transportation planning and management,transportation asset management,and transportation carbon emissions,Tel.:+8615202492338,fax:+862982336130,E-mail addresses:qiang.bai@chd.edu.cn(Q.Bai);Yuanyuan Liu,is a lecturer at the Department of Transportation Engineering,School of Civil and Transportation Engineering,Guangdong University of Technology,Guangzhou,China.She currently focuses on life-cycle assessment(LCA)for highway infrastructure related environmental impact accounting,uncertainty analysis and emissions,especially the carbon dioxide emission,mitigation policy making,E-mail addresses:liuyy@gdut.edu.cn(Y.Liu);Peirong(Slade)Wang,is a senior PhD student in the University of Texas at Arlington.He received his master degree in civil engineering at Mississippi State University.His research interests include traffic signal optimization,network modeling,high resolution traffic signal event data analysis and visualization,E-mail addresses:peirong.wang@mavs.uta.edu;Shuqi Xue,is an engineer at the Department of Traffic Engineering,College of Transportation Engineering,Chang'an University.He attained his master degree in transportation engineering from Technical University of Dresden and is a PhD candidate at Department of Traffic Engineering,Chang'an University.His research interests include transportation carbon emission assessment and low-carbon transportation,E-mail addresses:xueshuqi@chd.edu.cn(S.Xue);Qian Yu,is a lecturer at the College of Transportation Engineering,Chang'an University.She received the PhD degree in transportation engineering from Southeast University,Nanjing,China,2016.Her research interests include emissions and fuel consumption of road transportation system,eco-driving and driving behavior,E-mail addresses:yuqian@chd.edu.cn(Q.Yu);Qianrong Li,E-mail addresses:1149499811@qq.com(Q.Li)
