Quantitative Analysis of Eco-efficiency During Pavement Construction and Maintenance Period Based on LCA Theory
To quantify and compare the eco-efficiency of normal asphalt pavement,cement pavement and cement pavement with ultra-thin wearing layer,the resource consumption,energy consumption and carbon emissions generated by the three pavement types during the construction and maintenance period are calculated based on the life-cycle assessment system(LCA)and combining the construction quota method and the carbon emission factor method in the paper.The results show that:(1)compared with conventional concrete pavements,new asphalt pavements can reduce energy consumption by 4.64％and carbon emissions by 73.67％per year;(2)the resource consumption,energy consumption and carbon emission generated by adding single-layer ultra-thin wearing layer in the design life are reduced by more than 83％compared with asphalt pavement;(3)raw material production and mixing transportation are the main sources of carbon emissions during highway construction,and are the key areas of low-carbon highway construction.As a result,new asphalt pavements are more ecologically efficient than concrete pavements and can significantly reduce carbon emissions.The addition of ultra-thin wear layer on the old concrete pavement can effectively realize the low-carbon asphalt pavement construction and reduce pavement consumables.
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万方数据
