Study on the Performance and Field Application of Foamed Asphalt Cold Recycled Mixtures

To achieve efficient recycling and utilization of reclaimed asphalt pavement (RAP) materials and address the high energy consumption, severe environmental impacts, and high construction costs associated with conventional pavement recycling technologies, this study conducts a systematic investigation into foamed asphalt cold recycling technology.Laboratory tests were performed to optimize the asphalt foaming process parameters and mixture design, and the effects of different material components on the pavement performance of the recycled mixtures were analyzed to determine the optimal material composition.Furthermore, based on an actual pavement maintenance project, the key construction procedures of foamed asphalt cold recycling were introduced, and its engineering applicability as well as economic and environmental benefits were evaluated.The results demonstrate that the optimized foamed asphalt cold recycled mixture satisfies the specification requirements for all pavement performance indicators.The utilization rate of reclaimed asphalt materials exceeds 85%, effectively reducing pavement maintenance costs and carbon emissions.This study provides a technical reference for the application of foamed asphalt cold recycling technology in the rehabilitation and sustainable maintenance of reclaimed asphalt pavements.