University Study Highlights Benefits Of Recycled Materials In Pavement Construction

Researchers in the UAE have found that using recycled materials in road construction can lead to significant economic, environmental, and health benefits. Their study focused on an 8-km stretch of the Al Ittihad Taween Road in Ras Al Khaimah, which links two major highways. The research assessed various scenarios, including traditional pavement designs, through a life cycle assessment (LCA).

The study highlighted that incorporating recycled plastic and reclaimed asphalt pavement (RAP) into road construction significantly reduces greenhouse gases and air pollutants. It also enhances energy and water efficiency. RAP consists of reprocessed materials containing asphalt and aggregates, offering a sustainable alternative to conventional materials.

Prof. Hamed Assaf from the American University of Ras Al Khaimah and Prof. Ahmad Abu Abdo from Liwa College of Technology conducted this research. They aimed to showcase the potential benefits of using recycled materials in pavement construction. Prof. Assaf stated, "The aim of the study was to demonstrate hypothetical benefits of pavement construction using recycled materials."

The research suggests that replacing traditional binders and aggregates with recycled plastics can reduce environmental harm. This approach decreases waste, conserves energy and water, and limits the release of harmful pollutants. Recycled plastics offer superior environmental performance at varying replacement rates compared to RAP.

Prof. Assaf emphasized that RAP should replace conventional materials at rates above 10% to achieve these benefits. However, recycled plastic provides better environmental outcomes even at different replacement levels. "Environmental benefits include reduction of Greenhouse Gases (GHGs) and air pollutants as well as increasing the energy and water efficiency of pavement construction," he added.

This study underscores the importance of integrating sustainable practices in infrastructure projects. By adopting recycled materials, road construction can become more eco-friendly while also providing economic advantages.

With inputs from WAM