Are recycled aggregates good for drainage?

When you’re planning a construction project, drainage should always be a key consideration. A well-designed system helps water to flow away from surfaces; keeping the ground stable and structures secure for years to come.

A frequent question that the SRC team receive is: Can recycled aggregates be used for drainage? The short answer is yes; when handled properly, recycled aggregates from SRC Group can offer excellent drainage performance, whilst also supporting your sustainability goals.

What are recycled aggregates?

Primary, or virgin aggregates, are created from materials that have been excavated from our quarries. These materials are then processed into sharp sand, shingle, ballast and crushed stone, to be used in construction projects

Recycled aggregates, on the other hand, are created by processing materials recovered from construction, demolition and excavation projects. At SRC, this involves crushing, screening and washing the recovered materials to remove contaminants before preparing them for re-use.

What this means in practice is, you will receive materials which would normally go to landfill but instead they have been transformed into a construction resource. Recycled aggregates from SRC meet strict WRAP and Highways 600 standards and can be used in virtually any construction project.

We are often asked whether recycled aggregates are inferior to primary aggregates, and the honest answer is no, they are just as good.

What makes aggregates good for drainage?

Good drainage aggregates need to offer:

• Permeability: Allowing water to pass through rather than saturating materials.
• Stability: Staying solid without sinking or shifting.
• Cleanliness: Free from dirt or fine materials that could block water flow.

Using SRC’s recycled aggregates for drainage

Here are several reasons why recycled aggregates from SRC Group are ideal for drainage applications:

Rigorous quality control

SRC’s recycled aggregates undergo comprehensive washing, screening and testing in-house. As part of SRC’s circular economy model, the recycled materials are thoroughly processed to make sure that contaminants, fines and weak particles are removed.

This means that you will receive materials that perform at the same level as standard aggregates, without the additional environmental footprint.

Versatility

Recycled aggregates can be used for drainage systems, structural fill, pavement construction and much more.

Sustainability credentials

When you use recycled aggregates for drainage, you’re not just getting reliable, high-performing materials, you’re also helping to protect natural resources. Every tonne of recycled aggregates reduces the demand for newly quarried stone, making your project both practical and sustainable.

Where and how to use recycled aggregates for drainage

When requesting recycled aggregates for drainage purposes, it’s still best practice to confirm that the material source and processing meets the standards required. At SRC Group, we can advise on which type of aggregates will be suitable for your project’s needs.

It’s also helpful to know how to use them effectively:

• Use as clean fill or sub-base behind permeable paving or in soakaway systems: The cleaned and graded recycled aggregates can provide void space for water to flow and store temporarily before infiltration.
• Bedding and surround layer for underground drainage pipes: Placing recycled aggregates around perforated pipes can aid water entry and reduce risk of siltation or clogging if the material is clean.
• Backfill in retaining or basement drainage zones: The stability and performance of SRC-processed recycled aggregates will ensure that they can support loads and allow drainage behind walls.
• Surface drainage trenches: In landscaping or external hard-scape areas, recycled aggregates can be used in channels or trenches to capture and divert water efficiently.

The benefits of choosing recycled aggregates for drainage

Choosing SRC’s recycled aggregates can bring a number of benefits:

• Cost-effective: Because we process and reuse waste materials in-house, our recycled aggregates often provide real cost savings compared to using primary materials.
• Sustainable: By reducing the need for new extraction and diverting waste from landfill, our recycled aggregates can help to lower your project’s overall environmental impact.
• Reliable performance: Thanks to our strict quality controls and processing standards, our recycled aggregates are produced to perform; giving you confidence in every load.
• Supply flexibility: With our extensive fleet and logistics network, we can deliver recycled aggregates for projects of any size, from small local jobs to major infrastructure schemes.
• Integrated solution: Our recycled aggregates sit at the heart of our circular economy model. From waste management and processing through to supply, we provide you with a seamless, sustainable service backed by over 30 years of experience.

Considerations

By applying best practices and working with a credible supplier like SRC Group, recycled aggregates can be ideal for drainage. However, there are still considerations to keep in mind:

Plan the design: Good drainage isn’t just about the materials. Trenching, pipe layout and access for maintenance all play a big part in how well it works.

Think about moisture levels: In areas with very wet ground, you might need a specialist drainage setup rather than a standard sub-base.

Keep it accessible: Even the best system needs the odd check-up. Having access for maintenance helps to stop silt build-up and keeps things flowing properly.

Know your source: With recycled materials, it’s important to trust where they come from. All of our recycled aggregates are tested in-house and produced in line with WRAP protocols, so you know exactly what you’re getting.

Check the spec: Most importantly, make sure that the recycled aggregates that you’re using meet the right standards for your drainage job, things like grading and void space can make all the difference.

Impact on construction & the planet

Drainage may be a functional aspect of a build, but it’s also an integral part of its long-term performance. With correct drainage you can: avoid water-damage, prevent subsidence, reduce costly maintenance and strengthen the life-cycle of a project.

At SRC Group, recycled aggregates, low-carbon ready mix concrete, and ECO-BLOC® are all key parts of SRC Build, the final loop in our circular economy. By choosing to use these materials in construction projects, you’re making an ethical choice; build once, build well, build sustainably.

If you’re planning a drainage solution, soakaway, sub-base or external hard-scape where drainage is critical, consider using recycled aggregates from SRC. Our team can help you to select the right grade and discuss how to integrate the materials into your design to achieve the best results.

Get in touch today

To find out more about recycled aggregates or other sustainable products within SRC Build, contact our friendly team today. You can call us on 0208 594 0169, email us at enquiries@www.srcgroup.co.uk or fill out our online contact form and we will get back to you ASAP.