Calculation and Analysis of Carbon Emissions for Road Expansion and Improvement Based on Life Cycle Assessment(LCA)
In order to quantitatively assess the energy consumption and carbon emissions of highway infrastructure,this paper first summarizes and confirms the four major sources of carbon emissions,including resource changes,manual activities,material consumption and machinery use based on existing research,and proposes a mixed life cycle carbon emission calculation method based on carbon emission source grouping is proposed;secondly,the LCA theory is used to construct a carbon emission calculation model based on actual cases for carbon emission analysis;finally,the carbon emissions of each component are comparatively analyzed to determine the carbon emissions main influencing factors.The research results show that traceable group carbon emissions account for 81.93％of the total,of which material consumption accounts for the largest 67.26％,mainly cement and steel.Therefore,this study suggests focusing on design optimization,reducing the amount of building materials,or increasing the use of green building materials as the research priority for carbon emissions reduction and mitigation;labor and mechanical consumption contribute little to carbon emissions,and diesel for mechanical construction accounts for 67.9％,indicating that improving worker labor efficiency and promoting the use of clean energy are rational ways to reduce carbon emissions during the construction phase;the non-traceable group accounts for 17.95％,and its emissions cannot be ignored.It provides a new way of energy conservation and emission reduction to reduce the occupation of land resources and strengthen management,in order to provide theoretical support for energy conservation and emission reduction in highway reconstruction and expansion.
road engineeringenergy saving and emission reductionhybrid Life Cycle Assessment(LCA)approachcarbon emission accounting
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