Life Cycle Assessment (LCA) of Alternative Pavement Rehabilitation Solutions: A Case Study

In the context of sustainability, the pavement construction industry is taking a more holistic approach to environmental, economic, and social issues. In particular, pavements are believed to be responsible for up to 24% of total greenhouse gas emissions over the last century. Therefore, it is critical to include a tool to assess the environmental and health impacts of pavement construction or rehabilitation in the related design studies. This tool is called Life Cycle Assessment (LCA). With this in mind, this case study examines two alternative solutions for the rehabilitation of an existing highway pavement: one using conventional materials and processes and one using conventional recycled materials and recycling processes. These two alternatives are ecologically evaluated using an LCA method to increase the importance of quantifying environmental and health impacts. By comparing the corresponding results, this study aims to quantitatively demonstrate how recycled materials and recycling processes contribute to the sustainability of pavements. As a final result, it is shown that the environmental and human health benefits are significant, even though the use of recycled materials and processes for pavements may be limited.