How is hardcore waste recycled? From pick-up to end product

In the ever-evolving landscape of waste management, hardcore waste recycling is a key focus of sustainability and environmental conservation.

Construction debris makes up almost a third (62%) of all UK waste, but there is enormous potential for construction materials to be reused.

SunEnviro is dedicated to transparency in its management of hardcore waste, from collection to recycling. Here are the steps involved and what becomes of these robust materials when they’re recycled.

Hardcore waste recycling: How it’s done properly

Hardcore waste describes concrete, bricks, tiles, and ceramics from construction, demolition, and renovation projects. Unlike softer, more biodegradable waste, hardcore materials require specific processes for recycling.

Collection and sorting

The recycling process begins with the collection of hardcore waste, typically gathered from construction and demolition sites.

Skip hire services play a crucial role in this initial phase, providing designated containers for the separate collection of hardcore materials. This separation ensures the purity of the waste stream, facilitating more efficient recycling.

Once collected, the hardcore waste is transported to recycling facilities where it undergoes thorough sorting. Advanced sorting technologies, including manual sorting, mechanical processing, and sometimes even AI-powered systems, help separate different types of materials. This step removes contaminants and non-recyclable components that could compromise the quality of the recycled aggregate.

MORE: Construction waste disposal: Save money and avoid penalties

Crushing and screening

Heavy-duty machinery, such as jaw crushers, impact crushers, and cone crushers, break down the collected hardcore materials into smaller, manageable pieces. This crushing process not only reduces the size of the materials but also exposes any remaining impurities, such as metal reinforcements in concrete, which are then removed.

After crushing, the materials are screened. Screening involves separating the crushed hardcore into various sizes using vibratory screens or rotating drum screens. The recycled aggregates are then used in different construction applications, from sub-base layers in roads to general bulk fill.

Quality control and testing

Recycled aggregates undergo rigorous testing to ensure they meet specific quality standards and regulations. Tests typically assess the aggregate’s strength,  particle size, and resistance to abrasion.

Quality control measures guarantee that the recycled hardcore waste is safe and effective for use in new construction projects, offering a sustainable alternative to virgin quarry materials.

Applications of recycled hardcore waste

Recycled hardcore waste finds its way back into the construction industry in various forms. Some of the common applications include:

• Sub-base material for roads and highways: Recycled aggregates provide a stable foundation for road surfaces, contributing to the durability and longevity of transportation infrastructure.
• Bulk fill and landscaping: Crushed hardcore can be used for general fill purposes, such as raising ground levels or landscaping, where structural integrity is not the primary concern.
• Concrete production: Recycled aggregates can partially replace virgin materials in the production of new concrete, reducing the environmental footprint of construction projects.

MORE: Demolition waste: Breaking down the walls of unsustainability

SunEnviro’s new aggregate and soil washing plant

SunEnviro is dedicated to recycling as much of the hardcore waste it manages across Cambridgeshire, Suffolk, and Hertfordshire as possible.

To that end, the environmental services group is building a new site in Thetford that could save the Norfolk town from sending 140,000 tonnes of construction waste to landfill.

This innovative facility is designed to further refine the quality of recycled aggregates by washing away any remaining dirt, clay, or fine particles. This means an even purer, higher-quality end product suitable for a wider range of construction applications

SunEnviro managing director Mat Stewart said the planned recycling site would be of huge benefit to the local area and the environment.

He said, “We’re planning a modern recycling facility, which will be very good for the recycling needs in the county and help prevent construction waste from entering landfill sites.

“By transforming what was once considered waste into a valuable resource, we are taking a significant step towards a more sustainable and circular economy.”

And with the new brand SunDemolition, the group has taken 360º control of hardcore waste, so it can be sure that no value is lost in the process.

The environmental benefits of hardcore waste recycling

Recycling hardcore waste significantly reduces the demand for virgin quarry materials, conserving natural resources and minimising habitat disruption.

The process also conserves energy and reduces carbon emissions compared to the production and transportation of new materials.

It also helps divert substantial amounts of waste from landfills, reducing their usage and the associated emissions.

Studies have shown that for every tonne of concrete waste that is recycled, we can save up to 1,360 gallons of water and over 900 kg of CO2.

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The future of hardcore waste recycling

As technology advances and environmental regulations become more stringent, the recycling of hardcore waste is set to become even more efficient and widespread.

Innovations in crushing and sorting technologies, along with increased industry and public awareness, promise to enhance the sustainability of construction practices further.

Achieving a truly circular economy in construction will require collaboration across the entire value chain. SunEnviro is already working closely with suppliers, customers, and environmental organisations to foster a culture of sustainability. By sharing best practices, pooling resources, and advocating for policy support, we can collectively drive the industry towards more responsible waste management and material use.

By turning construction debris into valuable resources, the industry takes a significant step forward in its environmental stewardship, showcasing the potential for a circular economy in construction and demolition waste management.

MORE: Construction waste recycling: Your guide to a greener site

SunEnviro is proud to be supporting the local circular economy with the new aggregate and soil washing plant coming soon to Thetford. To discuss how we can make your operations more sustainable with our aggregate processing, get in touch with our expert team to discuss.