沥青路面施工能耗与碳排放评价

Energy Consumption and Carbon Emission Evaluation of Asphalt Pavement Construction

为了计算与分析沥青路面建设过程中产生的能耗与碳排放,将沥青路面建设过程分为原材料生产、混合料生产、材料运输、摊铺与碾压等5个阶段,建立沥青路面建设期各阶段的能耗与碳排放计算模型,通过工程实例计算出沥青路面在生产和施工全过程的能耗及碳排放,结果表明:沥青路面建设阶段能耗主要来源为原材料生产阶段与混合料生产阶段,分别占比65%、25%,;碳排放主要来源为原材料生产阶段与混合料生产阶段,占比为50%与41%。根据能耗与碳排放现状提出了低碳施工技术,采用沥青路面温拌技术,单位沥青混合料可节省能耗10.9~43.60MJ/t,降低碳排放0.83~3.30kg/t;采用搭设遮雨棚控制集料含水量,干旱地区与多雨地区单位集料可节省能耗40.05MJ/t与61MJ/t,降低碳排放2.90kg/t与4.84kg/t。

In order to calculate and analyze the energy consumption and carbon emission during the construction of asphalt pavement,the construction process of asphalt pavement is divided into five stages:raw material production,mixture production,material transportation,paving and rolling.The calculation models of energy consumption and carbon emission of asphalt pavement in different stages of construction are established,and the energy consumption and carbon emissions of asphalt pavement in the whole process of production and construction are calculated through project practice.The results indicate that the main energy consumption sources of asphalt pavement construction stage are raw material production stage and mixture production stage,accounting for 65%and 25%respectively;the main carbon emission sources are raw material production stage and mixture production stage,accounting for 50%and 41%.According to the present situation of energy consumption and carbon emission,low carbon construction technology is put forward.Using warm mixing technology of asphalt pavement,energy consumption per unit asphalt mixture can be saved by 10.9~43.60 MJ/t and carbon emission can be reduced by 0.83~3.30 kg/t.The unit aggregate in arid and rainy areas can save energy by 40.05 MJ/t and 61 MJ/t and reduce carbon emissions by 2.90 kg/t and 4.84 kg/t by setting up awning to control aggregate water content.