Research On Carbon Emission Management Of Gypsum-based Materials Based On The Whole Life Cycle Of Building

Under the background of the national carbon peak and carbon neutrality strategic goal deepening,the energy consumption of the construction industry,as the main force of the national total energy consumption,bears the brunt.The calcination temperature of gypsum-based materials is significantly lower than that of various types of cement.Compared to cement-based materials,they have lower energy consumption during the building lifecycle and have good physical properties such as insulation,sound insulation,and fire prevention.Therefore,in recent years,gypsum-based materials and their related industries have achieved rapid development,and research on carbon emission management throughout the entire life cycle of gypsum-based building materials is urgently needed.This project quantitatively analyzes the carbon emission values and influencing factors of gypsum-based materials in various stages of the entire life cycle of buildings through literature research,structural equation modeling,and case analysis methods.By collecting relevant information on building energy management both domestically and internationally,establish an input-output theory for full lifecycle assessment,and based on this,conduct research on the carbon emission calculation method and carbon emission path impact coefficient of gypsum-based materials in various stages of construction.Firstly,a case study was conducted on A residential building.By calculating the carbon emissions of each stage of the building,it was found that its total life cycle carbon emissions were 29,500 tons.Taking the full life cycle carbon emission characteristics of this case as a reference,under the premise of determining the system boundary of carbon emission management throughout the entire life cycle,an expert group was established to organize a questionnaire survey on the impact factors of each stage,and to screen out the carbon emission impact factors of each stage of the building.Propose several hypothesis settings and use Amos 22.0 software to fit and calculate the structural model to verify the correctness of the assumptions.Finally,establish a structural equation model for gypsum-based materials throughout the entire life cycle of the building.Use a decision management model to analyze the path impact coefficients of carbon emission impact factors at each stage.Research has shown that the impact factors involved in the early stage of construction have the greatest path coefficient on carbon emissions,followed by the construction stage,the recycling and demolition stage,and finally the operation stage.Among the secondary indicators of the entire lifecycle,the factors that have a significant impact are the calcination cooling device,material transportation distance and method,construction equipment energy consumption,material interior detachment area,material repair area,and repair frequency.Corresponding optimization measures have been taken for the four construction stages that have a significant impact on carbon emissions:prioritizing the use of gypsum based materials in the early stages of construction,transforming the calcination process of gypsum based materials in the production stage to reduce energy consumption,optimizing residential construction technology and construction level in the construction stage,controlling the area of veneer peeling during the operation stage,and improving the level of building operation and maintenance,optimize the dismantling and recycling process during the recycling phase and control the transportation distance.