An aircraft parking bay typically has a lifespan of 25 years. In the past, the repaving and reconstruction of these parking bays meant that old materials were discarded as construction waste and new construction material was used, comprising a concrete mix batched with 100% new stones. Through an engineering collaboration with a local university, such works now incorporate 50% new stones and 50% recycled stones in a concrete design mix.

This Recycled Concrete Aggregate (RCA) maintains the required quality and durability of the parking bays. Extensive laboratory trials were conducted to ensure the structural integrity and strength of the recycled concrete mix. To break up the concrete slabs into sizes suitable for new construction without any contamination, a rigorous quality control process is essential to the success of the project.

We look forward to continuing collaboration with innovative partners to encourage more circularity in Changi Airport as we move towards a zero-waste economy.