基于LCA的温拌再生沥青路面建设期节能减排效果研究
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摘要
为了研究温拌再生沥青路面建设期节能减排效果,基于生命周期方法,建立能耗和碳排放评价体系,分析了原路面铣刨运输、原材料生产运输、混合料生产、混合料施工四个阶段的能耗及碳排放,并对温拌再生技术能耗及碳排放影响因素进行敏感性分析。结果表明:温拌再生沥青路面建设期间,原材料生产运输及混合料生产的能耗及碳排放量占主要部分;与热拌技术相比,机械发泡类型温拌技术节能减排效果最为突出,节能率11.1%,减排率10.5%;新集料含水率提高2%,能耗值增加11.42 MJ,碳排放当量增加0.89kg;旧料掺量提高10%,能耗值减少40.97MJ,碳排放当量减少2.27kg;无论从能耗角度还是从碳排放当量角度,四种影响因素敏感度排序为:能源类型>旧料掺量>温拌剂类型>新集料含水率。
In order to study the energy-saving and emission reduction on the warm-mix asphalt recycling pavement during the construction,the evaluation system of energy consumption and carbon emission is established based on the Life Cycle Assessment(LCA),the energy consumption and carbon emission of the old road surface are respectively analyzed at phases of milling and transportation,raw material production and transportation,mixture production,and mixture construction,and further,sensitivity analysis of energy consumption and carbon emission factors of warm mixing recycling technology are carried out.The results show that during the construction of the warm-mix asphalt recycling pavement,the energy consumption and carbon emissions of raw material production and transportation and mixture production are the major part;compared with the hot-mix technology,the energy saving and emission reduction of mechanical foaming warm-mix technology is the most prominent,the rate of energy-saving is 11.1%,the rate of emission reduction is 10.5%;the moisture content of new aggregate increases by 2%,energy consumption increases 11.42 MJ,carbon equivalent emissions increase 0.89 kg;the rate of old asphalt mixture increases by 10%,energy consumption reduces 40.97 MJ,carbon emissions equivalent reduces 2.27 kg;and no matter from the perspective of energy consumption or carbon emissions,the sensitivity order of four factors is:energy type>rate of old asphalt mixture>warm-mix agent type>moisture content of new aggregate.
In order to study the energy-saving and emission reduction on the warm-mix asphalt recycling pavement during the construction,the evaluation system of energy consumption and carbon emission is established based on the Life Cycle Assessment(LCA),the energy consumption and carbon emission of the old road surface are respectively analyzed at phases of milling and transportation,raw material production and transportation,mixture production,and mixture construction,and further,sensitivity analysis of energy consumption and carbon emission factors of warm mixing recycling technology are carried out.The results show that during the construction of the warm-mix asphalt recycling pavement,the energy consumption and carbon emissions of raw material production and transportation and mixture production are the major part;compared with the hot-mix technology,the energy saving and emission reduction of mechanical foaming warm-mix technology is the most prominent,the rate of energy-saving is 11.1%,the rate of emission reduction is 10.5%;the moisture content of new aggregate increases by 2%,energy consumption increases 11.42 MJ,carbon equivalent emissions increase 0.89 kg;the rate of old asphalt mixture increases by 10%,energy consumption reduces 40.97 MJ,carbon emissions equivalent reduces 2.27 kg;and no matter from the perspective of energy consumption or carbon emissions,the sensitivity order of four factors is:energy type>rate of old asphalt mixture>warm-mix agent type>moisture content of new aggregate.
引文
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[13]章毅.沥青路面生命周期能耗与环境排放评价技术研究[R].上海:同济大学,2014.
[14]陈珺,吕正龙,刘开琼.基于LCA的橡胶沥青再生路面节能减排效果研究[J].公路,2016,(5):204-211.
[2]Philip White,Jay S Golden,Krishna P Biligiri,et al.Modeling climate change impacts of pavement production and construction[J].Resources,Conservation and Recycling,2010,54(11):776-782.
[3]潘美萍,基于LCA的高速公路能耗及碳排放计算方法研究与应用[D].广州:华南理工大学,2011.
[4]Agnès Jullien,Pierre Monéron,Gaetana Quaranta,et al.Air emissions from pavement layers composed of varying rates of reclaimed asphalt[J].Resources,Conservation and Recycling,2006,47(4):356-374.
[5]秦永春,黄颂昌,徐剑,等.温拌沥青混合料节能减排效果的测试与分析[J].公路交通科技,2009,26(8):33-37.
[6]李海洋.基于LCA温拌沥青路面建设期节能减排效果及经济性评价[D].重庆:重庆交通大学,2016.
[7]中国统计局.中国能源统计年鉴[M].北京:中国统计局出版社,2011.
[8]亿科环境.中国生命周期基础数据库(Chinese Life Cycle Database,CLCD)[EB/OL].http://www.ikeglobal.com/.
[9]JTG/T B06-02-2007公路工程预算定额[S].
[10]JTG/T B06-03-2007公路工程机械台班费用定额[S].
[11]吴爽.基于LCA的热拌与温拌沥青路面环境影响研究[D].南京:东南大学,2015.
[12]Eggleston H S,Buendia L,Miwa K,et al.IPCC guidelines for national greenhouse gas inventories[J].Institute for Global Environmental Strategies,Hayama,Japan,2006.
[13]章毅.沥青路面生命周期能耗与环境排放评价技术研究[R].上海:同济大学,2014.
[14]陈珺,吕正龙,刘开琼.基于LCA的橡胶沥青再生路面节能减排效果研究[J].公路,2016,(5):204-211.
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