Study On Environmental Impact Assessment Of Campus Road Reconstruction Project Based On LCA

In recent years,the rapid development of China's road construction drives the national economy and its environmental impact can not be underestimated.With the prosperity of the country,the university's infrastructure is also in full swing,the campus road transformation is one of which can not be ignored.Under international context of increasingly severe lack of resources and environmental pollution,the transformation of campus roads from the exploitation of raw materials to the disposal of the road,each stage consumes a lot of energy and discharge large amounts of gas and solid waste.Therefore,promoting rational campus road transformation system of energy consumption and emissions quantification can help the government,schools,construction units,design units and other multi understand direct contact between campus road transformation process and environment which is conducive to the transformation process and better campus construction decision.In this paper,based on the background and research significance,combined with the research results of road life cycle at home and abroad,researchers put forward feasibility of applying LCA method to campus road reconstruction.Also,the LCA method framework and steps are expounded in detail.After comparing three different types of life cycle analysis methods,we choose The LCA method based on process to quantify the life cycle energy consumption and emission of campus road reconstruction.Lifecycle system framework is established under the ISO14040 standard,The life cycle of the campus road transformation is divided into five stages: raw material mining and processing,transportation,construction,maintenance and disposal.We consider seven types of impact including the global warming,acidification effect,eutrophication,health,toxicity,particulate matter and land resources.The quota method and the literature survey method are selected as basis to calculate maintenance stage ' energy consumption and emission data of five kinds of campus road modification :raw materials and asphalt mixture,cement,concrete,cement stone slag,curb stone and permeable brick.After establishing the energy consumption calculation formula in the transportation phase,Quota method and emission factor method are selected to calculate energy consumption and emission data during construction stage and disposal stage of Campus road reconstruction.Taking the transformation of campus system in Shenzhen University as an example,this paper calculates the energy consumption and emission of five types of campus road reconstruction plan according to the proposed campus road reconstruction system,and compiles the list of life cycle data to quantify the environmental impact.In addition to that,Concrete production is the most energy-consuming materials,followed by asphalt concrete;granite curb transporting energy consumption is the highest,followed by permeable bricks;milling pavement and the elimination of damaged road energy consumption is much higher than other construction and maintenance phase of the process.The global warming and land resource impacts of the five types of campus roads are the most significant,with 2-3 orders of magnitude more impact than the other five categories.In order to reduce campus road emission,we can cut down greenhouse gas generation and promote recycling of waste.This research is a preliminary exploration of the life cycle of campus road reconstruction analysis.The results are instructive for formulation and application of new construction technology,it will provide the basis for the government departments to formulate relevant laws and regulations focusing on energy conservation and emission reduction.