Research On Carbon Emission Calculation And Reduction Strategy Of Building Materials In The Whole Life Cycle

Due to the increasingly serious greenhouse effect on the Earth,abnormal weather conditions have also occurred from time to time in recent years,and environmental protection is imminent.The main reason is excessive greenhouse gas emissions.According to relevant statistics,the greenhouse gases generated by the construction industry account for almost 30%of the global total,posing a huge challenge to the global climate and environment.The construction sector has an unshirkable responsibility for how China can achieve the carbon peak by 2030.Reducing national carbon emissions requires reducing building carbon emissions.Building materials,as an important component of buildings,are the key to energy conservation and emission reduction in the construction field.Through research and analysis,it is found that current domestic and foreign scholars’ research on building carbon emissions mainly focuses on the full life cycle carbon emissions of buildings or the performance of certain building materials,but there is insufficient research on the measurement system of the full life cycle carbon emissions of building materials,especially on the operation and recycling of building materials.Therefore,this article focuses on the research on the composition of carbon emissions during the full life cycle of building materials,and proposes carbon emission measurement models that can be oriented to different life cycle stages based on China’s "Building Carbon Emission Calculation Standard".Based on this,it deeply studies the key factors affecting carbon emissions during the recycling stage of building materials,and proposes energy-saving and emission reduction strategies based on improving the carbon emission measurement system for the full life cycle of building materials.Firstly,based on the full life cycle theory(LCA),the entire life cycle of building materials is divided into six stages,defining the main sources of carbon emissions in each stage,and combining national standards,a carbon emission measurement model for the entire life cycle of building materials is proposed.Compared with traditional models,this model complements the measurement methods for the operation and recovery stages of the carbon emissions measurement process of the entire life cycle of building materials,Enriches the carbon emission measurement system for the entire life cycle of building materials,providing theoretical support for the proposed follow-up strategies.Then,taking the Yinhe continuous beam reinforced concrete structure of Anhui Tongcheng He’an High Speed Railway Project as a case building,the model proposed in this article is used to calculate the carbon emissions of the project’s construction materials at various stages based on the full life cycle perspective,and the main influencing factors of the carbon emissions of the construction materials during the full life cycle are analyzed.After sensitivity analysis of the influencing factors,It is determined that the location of the recycling and treatment center has a positive impact on carbon emissions and economic costs during the recovery phase.Therefore,a dual objective calculation model for economic and environmental costs during the recovery phase is proposed.Finally,the project case data is substituted into the dual objective model to define the different ranges of the impact of secondary transportation distance on the economic costs and carbon emission costs of enterprises in the recovery stage,achieving carbon emission reduction of building materials from a full life cycle perspective,providing data support for energy conservation and emission reduction of building materials in the future.