Economic and Environmental Benefits Assessment of Permeable Composite Pavement for Urban Intersection Roads
As a new pavement maintenance technology,the economic and environmental benefits of the permeable composite pavement are not yet clear.Based on a practical maintenance project,this study carried out a quantitative evaluation of the economic costs and environmental impacts of permeable composite pavements using life cycle assessment and life cycle cost analysis,and compared it with tra-ditional mill and fill.The results show that the energy consumption,carbon emissions,and overall cost of the permeable composite pavement compared to mill and fill were 5.16%,58.10%,and 136%higher in the material production and construction phases,respectively.After considering the pavement service life,as long as the permeable composite pavement can serve more than one year more than mill and fill,it will have an energy consumption advantage.If its service life can further reach more than 1.58 times that of mill and fill,carbon reduction can also be achieved.In terms of economic benefits,advan-tages can only be achieved when the service life of the permeable composite pavement is significantly longer than that of the mill and fill.For example,the permeable composite pavement has a service life of 14 years and the mill and fill only serves 5 years.
permeable composite pavementlife cycle analysiseconomic and environmental benefitscarbon emissions
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