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Non-Hazardous Soil & Stones

Non-hazardous soil and stones comes to our plant as excavation waste from construction projects. This type of waste accounts for roughly a third of all waste arisings in Scotland and if handled in a linear way, results in 1 million tonnes of material being sent to landfill when this valuable materials could be recycled and repurposed for the construction industry.

Applications & Uses

Once non-hazardous soil and stones has made its way through our wash plant process, it is turned into high quality recycled aggregates and topsoil ready to be used in a variety of construction projects. Topsoil can be used for backfilling and landscaping. Recycled aggregates can be used in cement and monoblock production, as drainage material, subbase and for pathways. 

20-40mm gravel

HOW DO WE RECYCLE NON-HAZARDOUS SOIL & STONES?  

  1. Step One:
    The construction and demolition waste enters our state-of-the-art recycling plant.
  2. Step Two:
    Oversized materials are removed at this stage so that nothing bigger than 100mm enters the recycling process.
  3. Step Three:
    A large magnet removes any remaining metal.
  4. Step Four:
    The aggregate and sand are separated.
  5. Step Five:
    The aggregates are sent through the aggregates processor whilst anything below 4mm is diverted to the sand plant.
  6. Step Six:
    In the sand plant, the hydrocyclones use centrifugal force to separate the two washed sands.
  7. Step Seven:
    The sand is then separated further into different densities and cuts producing two sands, 0-2mm soft sand and 0-4mm sharp sand.
  8. Step Eight:
    In the aggregates processor, the processor gives the aggregate a thorough wash and scrub when it’s cleaned through the log washer.
  9. Step Nine:
    Finally, the aggregates are screened by a range of sieves to split them into 3 different sizes, 4-10mm, 10-20mm and 20-40mm. The 3 different-sized recycled aggregates are then fed out of the plant on conveyor belts to their individual stockpiles.

The Result

The waste is recycled into high quality materials that can be sold back into the construction industry to reduce the consumption of environmentally damaging virgin materials and offering a sustainable alternative to disposing of the materials in landfills.