摘要
公路基础设施高质量智慧建养是保障我国“双碳”目标的重要需求。目前我国公路养护里程超过500万km,在养护工程中的能耗和产生的碳排放尚无明确的评价标准。本研究将沥青路面养护过程划分为原材料生产、混合料拌合生产、混合料摊铺碾压及材料运输四个环节,利用层次分析法确定了多个典型养护工程各环节中能耗及碳排放的权重,提出了能耗指数(ECI)和碳成本指数(ECCI)两个评价指标及计算方法,量化研究了养护工程的直接能耗和碳排放情况。研究表明:养护技术的原材料生产及拌合前加热为能耗的主要环节,两个环节的ECI指数值占整体ECI指标值的80%以上;养护工程中上面层及罩面层应用的改性沥青等高性能材料导致了高能耗和碳排放,采用改性沥青的养护技术ECI值较普通沥青提高了100%;采用低温或再生类的养护技术节能效果明显,其中就地冷再生ECCI指数较常规养护工程降低50%以上,再生类养护技术能对公路养护行业的减碳行为起到很好的支持。
The Chinese‘double carbon’target should be actively promoted by highway infrastructure while facilitating rapid economic development.However,there is currently no clear evaluation standard for energy consumption and carbon emissions during the maintenance of millions of kilometers of roads.This study divided asphalt pavement maintenance projects into four stages:raw material production,asphalt mixture production,paving and rolling,and materials transportation.The analytic hierarchy process(AHP)was applied to analyze the energy consumption and carbon emission weights of various stages in several typical maintenance projects.Two evaluation indexes and calculation methods,energy consumption index(ECI)and energy consumption cost index(ECCI),were proposed to quantitatively analyze the direct energy consumption and carbon emission of maintenance projects.The research showed that the production of raw materials and materials heating before mixing had the highest energy consumption,with the ECI index values of these two stages accounting for more than 80%of the overall ECI index value.The upper layer and overlay layer in the maintenance project required more energy and carbon emissions for better performance.The ECI value of maintenance technology using modified asphalt was 100%higher than that of matrix asphalt.The energy-saving effect of low temperature or regenerative maintenance technology was significant,with the ECCI index of cold in-place recycling being more than 50%lower than that of conventional maintenance projects.
作者
仪明伟
肖月
林翔
李强
弋晓明
YI Mingwei;XIAO Yue;LIN Xiang;LI Qiang;YI Xiaoming(State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan 430070,China;RoadMainT Co.,Ltd.,Beijing 100095,China;Research Institute of Highway Ministry of Transport,Beijing 100088,China;School of Material Science and Engineering,Chang’an University,Xi’an 710064,China)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2024年第20期107-117,共11页
Materials Reports
关键词
公路养护
直接能耗
碳排放
沥青路面
能耗指数
碳成本指数
highway maintenance
direct energy consumption
carbon emission
asphalt pavements
energy consumption index(ECI)
energy consumption cost index(ECCI)
