What Are Recycled Aggregates and Why Are They Beneficial?

4th September 2019

An industrial plastic bag filled with recycled aggregates.

Reliable, sustainable alternatives to quarried stone for construction

Stone isn’t a single-use material. After a building or road has been dismantled, materials like asphalt and concrete can be crushed, screened and turned into recycled aggregates for reuse.

Recycled aggregates are widely used for road construction, sub-bases, driveways and general groundworks. When properly processed and compacted, they offer comparable load-bearing performance to quarried stone.

They’re also cheaper than virgin materials. And since they reduce landfill waste and the demand for freshly quarried aggregates, they help reduce the environmental impact of construction.

Understanding what recycled aggregates are, the benefits of recycled aggregates and when to use them can help you save money while improving construction results. So keep reading to find out if recycled aggregates are the right fit for your upcoming projects.

Contact Hazell & Jefferies Ltd today to buy strong, cost-effective and environmentally friendly recycled aggregates for delivery throughout the UK.

 

Key facts about recycled aggregates

  • Recycled aggregates are made by crushing and screening construction waste
  • They provide comparable strength and load-bearing performance to quarried stone
  • Contractors use recycled materials for sub-based, drainage layers and large-scale civil engineering
  • Using recycled materials cuts costs and lowers your carbon footprint
  • Hazell & Jefferies Ltd supplies high-quality recycled aggregates from our Oxfordshire recycling centre

 

What are recycled aggregates?

Recycled aggregates are sustainable construction materials made from previously used stone left over from demolition sites, road planing operations and construction waste.

They’re made by crushing materials like asphalt paving and concrete at a recycling centre, then screening and grading them into usable sizes for different applications.

Although recycled aggregates aren’t freshly quarried, they provide similar structural stability and load-bearing capacity to primary aggregates. They’re very popular for construction, making up over 27% of the aggregate supply in Great Britain.

And as part of a circular aggregate supply chain, they minimise environmental impact by turning waste materials into usable building resources.

 

What are recycled aggregates good for? Common uses in construction

A great deal of civil engineering projects rely on recycled aggregates to create sub-bases and drainage layers. But they’re also used in commercial and domestic settings, such as laying the foundations for driveway surfacing.

Common uses of recycled aggregates include:

  • Road and driveway sub-bases: Contractors install a compacted foundation layer of recycled aggregates beneath the surface material to distribute vehicle loads and improve long-term performance
  • Car park foundations: In high-traffic areas, recycled aggregates provide a durable base that can handle repeated vehicle movements and heavy loads
  • Farm tracks and rural access roads: Recycled aggregates are a practical, cost-effective way to create all-weather access routes in agricultural settings
  • Temporary haul roads to construction sites: Laying down recycled aggregates creates a temporary surface for heavy plant and lorries to move safely across worksites on active projects
  • Hardstanding areas for plant and machinery: A well-compacted base ensures stability for spaces where heavy equipment is stored or operated
  • Drainage layers and soakaway backfill: Certain grades of recycled aggregates allow water to pass through while still providing strong structural support for the surface layer
  • Bulk fill for ground-level adjustments: Road surfacing contractors use recycled aggregates to smooth our uneven spaces before installation
  • Foundation layers for footpaths and pavements: A base layer of recycled aggregates provides a level surface for walkways and helps them resist long-term settlement
  • Capping layers for new highways: In large-scale projects, recycled aggregates provide a strengthening layer even before the sub-base is installed

 

5 benefits of recycled aggregates

There are many benefits of using recycled aggregates, including lower costs, high strength and driving eco-friendly construction. To give you an idea of how valuable they can be, we’ve narrowed it down to our top 5 benefits.

 

1) Lower costs

When you buy newly quarried aggregates, you’re also covering the cost of extraction, haulage and processing – not a great use of your budget. But since it’s cheap and easy to turn readily available construction waste into high-quality recycled aggregates, you can buy them at a lower price.

 

2) Reliable strength and durability

Properly graded, laid and compacted recycled aggregates offer the same degree of structural stability as primary aggregates. That’s why they’re a popular choice for load-bearing sub-bases and surfacing materials in a wide range of construction projects.

 

3) Lower carbon footprint

Recycled aggregates don’t need to be quarried. They’re also less energy-intensive to produce than virgin aggregates. And since they’re quite easy to source locally, they don’t usually require as many transport miles.

As a result, these eco-friendly construction materials preserve natural resources and produce fewer project emissions. That helps you achieve your environmental goals and build a positive public reputation.

 

4) Less landfill waste

Rather than sending demolition and construction waste to a landfill, recycling diverts high-quality materials back into use. This supports a sustainable circular economy and reduces pressure on landfill capacity.

 

5) Often sourced locally

Regional demolition and roadworks waste is generally sent to local recycling centres. When you buy recycled aggregates from these centres, you reduce costs, improve supply chain reliability and support your local recycling infrastructure.

 

Recommended types of recycled aggregates

At Hazell & Jefferies Ltd, we supply local and national construction projects with a range of high-quality aggregates screened and graded for different purposes. These include:

  • 6F2 crushed stone: Also known as Type 2, this coarse material is made from crushed concrete, brick and mortar recovered from demolition works. It’s typically used as a free-draining sub-base for roads, driveways and pathways, supplied in sizes from 75mm down to dust
  • 10mm and 20mm shingle: These smaller, dry-screened stones are graded to allow effective water movement. They’re a great fit for drainage layers, pipe bedding and landscaping where permeability matter
  • Cable sand: A fine, free-flowing sand designed to surround and protect underground cables and pipes. Once compacted, it forms a stable bedding layer that allows heat to dissipate from the services it protects
  • 75mm/40mm concrete: This aggregate consists of crushed concrete or brick screened to remove excess fines. Common uses include sub-base construction and drainage layers where a strong, open structure is required
  • Screened road planings: Produced during the removal of existing road surfaces, this material is screened to achieve consistent sizing. After compaction, it forms a firm surface suited to driveways, farm tracks and access routes
  • Type 1 recycled: A well-graded crushed concrete blend designed to compact tightly into a stable foundation. It’s commonly used beneath roads, footpaths and driveways, available at 40mm down to dust
  • Crushed tarmac: Made from reclaimed asphalt recovered during surfacing works. When laid and compacted, it creates a durable base layer for private roads and car parks

 

Where to buy recycled aggregates in Oxfordshire, Berkshire and Reading

Construction firms, businesses and residents in Oxfordshire, Berkshire, Reading and the surrounding areas rely on Hazell & Jefferies Ltd for affordable, reliable recycled aggregates.

As a licensed recycling contractor, we process waste from local construction sites and road projects into premium recycled aggregates at our Oxfordshire recycling centre. We use these in our own works and sell them at low rates to developers and contractors.

Contact us today for a fair quote on eco-friendly recycled aggregates that cut costs and improve the results of your project.

 

What are recycled aggregates FAQs

Are recycled aggregates as strong as quarried stone?

If you choose the right sizes and lay your recycled aggregates properly, they offer the same stability, durability and strength as virgin materials.

 

Are recycled aggregates safe for construction?

Properly screened and graded recycled aggregates are safe for construction. They’re very commonly used for highways, car parks and commercial yards – all settings where structural reliability is essential.

However, safety and performance depend on sourcing recycled aggregates from a reputable, licensed vendor like Hazell & Jefferies Ltd. Contact us today for high-quality recycled aggregates delivered throughout the UK.

 

Are recycled aggregates suitable for drainage?

Certain grades like 10mm and 20mm are perfect for drainage layers as they allow water to flow between the stones. That’s why recycled aggregates are often used in soakaways, pipe bedding and backfill around drainage systems.

But not all recycled materials are free-draining. So it’s important to speak with a knowledgeable vendor to make sure you choose a suitable grading for the right level of permeability.

 

What projects can I use recycled aggregates for?

You can use recycled aggregates for hundreds of commercial, domestic and local authority projects, including:

  • Road sub-bases
  • Driveway foundations
  • Car park bases
  • Commercial yard foundations
  • Farm tracks
  • Site access roads
  • Temporary haul roads
  • Hardstanding areas
  • Footpath bases
  • Patio sub-bases
  • Shed and outbuilding foundations
  • Ground levelling and bulk fill
  • Drainage layers and soakaways
  • Capping layers on weak ground
  • Trench backfill around services

 

Where can I buy recycled aggregates?

You can usually buy recycled aggregates from local recycling centres that process demolition and road waste. These vendors often supply bulk loads for contractors and developers, with options for delivery or collection.

At Hazell & Jefferies Ltd, we collect waste materials from road surfacing projects and process them into high-quality recycled aggregates at our Oxfordshire recycling centre. We use these for our own projects, but also sell them throughout Oxfordshire, Berkshire, Reading and the wider UK.

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