Circular construction is redefining perceptions of recycled materials in the industry.
- Global circularity efforts are reversing, with a decline in recycled material use.
- UK construction has a prime opportunity to lead in sustainable practices.
- Recycled asphalt and materials offer performance benefits in highways.
- Industry-wide mindset shifts and investments are crucial for progress.
In recent years, the concept of circular construction has emerged as a transformative approach within the industry, challenging the outdated notion that recycled materials are inferior to virgin resources. The global initiative towards a circular economy is, however, experiencing setbacks, with the proportion of secondary materials in use dropping from 9 per cent in 2018 to 7 per cent in 2023. This presents an opportunity for the UK construction sector to set a global precedent by integrating sustainable practices into its core operations.
In particular, the incorporation of recycled materials such as asphalt, paving blocks, and kerbs is demonstrating superior performance in infrastructure projects like highways. These recycled products often outperform traditional materials due to advances in research and development. For example, the introduction of polymer-modified bitumen in recycled asphalt mixes has resulted in roads that are more durable and resilient, underscoring the need for regulatory amendments that favour increased recycled content.
Transitioning to a circular economy necessitates a fundamental alteration in industry mindsets. A pivotal element in this shift is the dissemination of knowledge and data across the sector, demonstrating that recycled materials can be equal to, if not better than, their virgin counterparts. Essential to this process is investment in both proving the efficacy of recycled materials and acquiring the technology required to process them efficiently.
Furthermore, adopting circular principles not only contributes to resource conservation but significantly reduces the carbon footprint of construction projects. Data indicates a 60 per cent reduction in embodied carbon for each tonne of asphalt recycled. The synergy of material reuse with other innovations can substantially extend the life span of infrastructure assets. In road construction, the target is to extend the lifespan of roads from the current 7-10 years to potentially 15-20 years.
Finally, mainstreaming circular practices will depend on sector-wide adoption of new methodologies and adherence to robust, standardised benchmarks such as PAS 2080. The implementation of these standards will facilitate differentiation between superficial green initiatives and genuine technological advancements, driving the entire industry towards a future centred on sustainability.
Circular construction holds the potential to lead the industry towards a sustainable future, provided the necessary mindset and regulatory changes are embraced.
