Research On Carbon Emission Evaluation And Emission Reduction Strategy During Materialization Stage Of Prefabricated Building

In recent years,various ecological and environmental problems caused by energy consumption,and all sectors of society pay more and more attention to the living environment.According to the Fifth Climate Change Assessment Report issued by the IPCC,building energy consumption accounts for about 40%,second only to industrial energy consumption.With the advancement of urbanization,the traditional construction system with high energy consumption and high emission need to be improved urgently.How to lower construction energy consumption,Given this situation,prefabricated buildings have such advantages as environmental protection and resource conservation,It gradually attract people’s attention.Materialization Stage is an important part of the whole life cycle of prefabricated buildings,and the greenhouse effect caused by gas emissions during this period accounts for about 20% of the whole life cycle,However,there have been few studies on the Materialization Stage of prefabricated buildings.Therefore,this paper will study and evaluate the carbon footprint of prefabricated concrete buildings in the materialization stage,controls the carbon emission of the construction industry by analyzing the carbon footprint sources and emission rules in the materialization stage,which has important theoretical value and practical significance for the realization of low-carbon construction in China.First of all,this paper gives an overview of the basic theories related to prefabricated concrete structure,introduces the carbon footprint measurement method,and summarizes the related technologies of building information model(BIM).The materialization stage is divided into three parts:factory production and manufacturing stage,logistics and transportation stage,as well as construction stage.The carbon emission sources in the materialization stage are defined,the influencing factors of carbon emission in each stage are analyzed,the carbon footprint calculation boundary in the materialization stage is determined,and the carbon emission coefficient method is used to calculate the carbon footprint calculation model in the materialization stage of prefabricated buildings,and some related carbon footprint factor databases are updated.With reference to the powerful data processing function of BIM technology and the use of Chenxi pricing software in the materialization stage,the carbon emissions volume can be quickly obtained.Combined with the carbon footprint evaluation standard selected in this paper,it can provide technical support for the qualitative and quantitative assessment of carbon footprint.Secondly,in order to further explore law of carbon emissions during the materialization stage of prefabricated construction,four calculation cases of prefabricated buildings and traditional cast-in-situ concrete construction are selected in Fujian Province,Revit software is adopted to establish the model on the case,to obtain the quantities and calculate the carbon footprint during the materialization stage,According to the calculation results,four cases are analyzed and compared.Finally,the paper gives emission reduction measures for specific materialization stage,and provides emission reduction suggestions from greening measures and policy system.This paper confirms the operability of carbon footprint measurement and the advantages of energy conservation and emission reduction of prefabricated buildings,which has important guiding significance and reference value for the implementation of prefabricated buildings.