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Moving towards a circular economy in the construction sector

GROWING interest in environmental issues is putting pressure on the construction sector to move towards a circular economy with greater emphasis on the sustainable recovery of waste materials. Here I’ll discuss the issues and offers some solutions.

In the construction sector, what happens to many products at end-of-life is typically not considered owing to their longer lifespans and the need for them to meet strict technical performance criteria.

The construction industry is the UK’s biggest consumer of natural resources.

According to Defra, an estimated 120m tonnes of construction, demolition, and excavation (CD&E) waste was produced in 2016. While their statistics indicate 92% of non-hazardous construction and demolition waste was recovered in some form (55m tonnes) in 2016, nearly 5m tonnes (8%) of non-hazardous construction and demolition waste was landfilled.

Waste is generated during the construction and installation phases and when products reach the end of their life. While many materials, such as PVC and metals, are recyclable, the construction sector is a challenging diverse environment for waste management and requires a heavy reliance on engaging with contractors to collect these recoverable resources.

Capturing waste at the installation phase should always be done where possible as the material is clean, we know what exactly is in it, and this improves the chances it can successfully be turned back into new products. End-of-life waste is more challenging, and more work will be needed in the future to establish effective recycling techniques and end markets for the recyclates.

For installation waste, a great example of circular construction is the Recofloor scheme which offers a sustainable collection service for commercial waste vinyl flooring generated from refurbishment and newbuild projects, including live project sites. The scheme accepts installation offcuts and uplifted smooth and looselay vinyl, as well as luxury vinyl tiles (LVTs) and safety offcuts and roll-ends.

Since its 2009 inception, the scheme has diverted more than 6,000 tonnes of waste vinyl flooring from landfill for use in new vinyl flooring or other useful products. The scheme continues to expand as more flooring companies recognise the environmental value – and reduced disposal costs of up to 70% – of recovering recyclable resources.

By capturing more waste at the installation phase and developing a viable recycling route, it’s more likely in the future we’ll be able to develop more solutions for end-of-life construction waste.

Moving towards ‘circular construction principles’ still presents many challenges, such as the collection of materials on a busy site with lots of different contractors, transportation, a lack of sorting infrastructure, and limited end markets.

For example, Recofloor relies on the efforts of individual contractors to help return the vinyl flooring for recycling. Without effective communication and their willingness to participate, it would not be possible.

But as a successful, growing scheme, Recofloor shows it can be done, with a focus on installation offcuts versus end-of-life/uplifted material. The latter is still a challenge that needs to be addressed in the future.

Richard McKinlay, head of consulting at resource recovery specialist Axion says: ‘If we can tackle installation waste, that is where we really need to focus our efforts initially to get the material coming back. If you build up that system, then you start to build infrastructure which could then allow end-of-life material to enter it eventually.’

Typically, the development of recycling infrastructure starts with reusing production waste first as this is the ‘purest’ material to put back into the manufacturing process. Attention then turns to clean scrap materials, followed by the more difficult post-consumer waste as recycling techniques become more advanced.

For the construction sector to move towards more circular sustainability, we will need to see more and more solutions like Recofloor in the coming years.

Recofloor is free to join and easy to use. Visit www.recofloor.org where you can find out more about the Recofloor scheme. 
0161 355 7618
info@recofloor.org
www.recofloor.org

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