Environmental Benefit Analysis of Hot Central Plant Recycling Asphalt Pavement Based on LCA

Abstract

In order to determine the energy-saving and emission-reduction effects of the application of hot central plant recycling in the highway asphalt pavement maintenance project, this study selects a road section of overhaul project in Tongren as the analysis object, and adopt the environmental benefit analysis method based on life cycle assessment to analyze the energy consumption and environmental emissions of hot central plant recycling and hot mix asphalt. The comparison shows that the application of hot central plant recycling in highway asphalt pavement maintenance project has good energy saving and emission reduction benefits, and the aggregate and asphalt production stage are the main components. Moreover, under the condition of ensuring the road performance of recycled pavement, with the increasing proportion of reclaimed asphalt pavement, the environmental benefit of recycled pavement is higher. While with the increase of reclaimed asphalt pavement transportation distance, the environmental benefit presents a downward trend.