基于LCA的道路工程物化阶段碳排放计算

Calculation of Carbon Emission at the Materialization Stage of Road Engineering Based on LCA

在“双碳”的大背景下,道路作为我国碳排放的重要来源之一,确定其工程物化阶段的碳排放主要贡献来源具有重大意义。因此,通过对道路物化阶段碳排放的研究现状进行综述,创新性地将全寿命周期理论与道路碳排放相结合对浙江省宁波市奉化区岳林街道长汀路整治工程进行了分析,并采用碳排放因子法,结合工程实际材料用量和工程图纸,计算出整个工程物化阶段的碳排放总量为36418651.37 kgCO_(2)e;材料生产的碳排放总量为33146776.91 kgCO_(2)e,占整个工程物化阶段碳排放总量的91%。材料生产与运输阶段主要碳排放来源是路基材料、混凝土、水泥、钢材等。其中:路基材料碳排放量最高,为24094956.02 kgCO_(2)e,占材料生产与运输阶段碳排放总量的69.81%。轴流通风机在建设阶段碳排放量最高,占建设阶段总碳排放量的24.94%。因此,认为路基材料与轴流通风机极具减排潜能。

Under the background of"carbon peaking and carbon neutrality goals",road is one of the important sources of carbon emission in China.It is of great significance to determine the main contributing sources of carbon emission in the materialization phase of the road project.Therefore,the current research status of carbon emission in the materialization phase of roads is reviewed.All life cycle assessment(LCA)and carbon emission of roads are innovative combined to analyze the Changting Road Improvement Project in Fenghua District,Ningbo City,Zhejiang Province.By adopting the carbon emission factor method,combined with the actual material dosage of the project and engineering drawings,the total carbon emission of the whole project's physical phase is calculated to be 36418651.37 kgCO_(2)e;The total carbon emission of the material production is 33146776.91 kgCO_(2)e,which accounts for 91%of the total carbon emission of the whole project's physical phase.The main sources of carbon emissions in the material production and transportation stage are roadbed materials,concrete,cement,steel and so on.Among them,the roadbed material has the highest carbon emission,which is 24094956.02 kgCO_(2)e accounting for 69.81%of the total carbon emission;The axial flow ventilator has the highest carbon emission in the construction stage,accounting for 24.94%of the total carbon emission.Therefore,it is considered that roadbed materials and axial flow ventilators have great potential for emission reduction.