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Non-hazardous Soil & Stones

Where does it come from?

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.

20-40mm gravel

How do we recycle Non-hazardous Soil & Stones

  1. The construction and demolition waste enters our state-of-the-art recycling plant.

  2. Oversized materials are removed at this stage so that nothing bigger than 100mm enters the recycling process.

  3. A large magnet removes any remaining metal.

  4. The aggregate and sand are separated.

  5. The aggregates are sent through the aggregates processor whilst anything below 4mm is diverted to the sand plant.

  6. In the sand plant, the hydrocyclones use centrifugal force to separate the two washed sands.

  7. The sand is then separated further into different densities and cuts producing two sands, 0-2mm soft sand and 0-4mm sharp sand.

  8. In the aggregates processor, the processor gives the aggregate a thorough wash and scrub when it’s cleaned through the log washer.

  9. 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.