基于LCA的沥青路面施工期碳排放模型及特征研究

Study on Carbon Emission Model and Characteristics of Asphalt Pavement Construction Period Based on LCA

沥青路面建设产生大量的温室气体,是交通领域节能减排的重点。通过分析沥青路面施工期碳排放来源,结合IPCC及CLCD数据库等提供的碳排放因子资料,采用LCA法构建沥青路面施工期碳排放计量模型,基于典型路面结构方案得出原材料生产、场外拌和、运输和现场施工阶段碳排放量及特征规律。结果表明:沥青面层施工过程中,原材料生产阶段碳排放量最高,占总排放量的47.52%;混合料拌和阶段次之,占总排放量的44.71%,节能减排措施以采用清洁燃料、提高施工机具生产效率为主;水稳基层/底基层铺筑同样为原材料生产阶段,碳排放量占比最高,高达总量的90%,节能减排措施以选用低碳水泥为主。

A mass of greenhouse gases produced from the construction of asphalt pavement is the focus of energy conservation and emission reduction in the field of transportation.By analyzing the sources of carbon emission during the construction of asphalt pavement,combined with the carbon emission factors provided by IPCC and CLCD databases and the other information,the carbon emission measurement model of asphalt pavement construction period is constructed by LCA method.Based on the typical pavement structure schemes,the carbon emission and characteristic laws of raw material production,off-site mixing,transportation and on-site construction stages are obtained.The results show that during the construction of asphalt surface layer,the carbon emission in the raw material production stage is the highest,accounting for 47.52% of the total emission,and the mixing stage of mixture is the second highest,accounting for 44.71% of the total emission.The energy conservation and emission reduction measures should be mainly to adopt the clean fuel and to improve the production efficiency of construction machinery.In the production stage of the same raw material for laying the water-stabilized base/subbase,the proportion of carbon emission is the highest,accounting for 90% of the total emission.The energy conservation and emission reduction measures are mainly to use the low-carbon cement.