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Independent Aggregates, Scotland

Case study

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The company currently process natural sand and gravel in order to create quality sports sands as well as concrete sands and asphalt sands.

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Glasgow based company Independent Aggregates have employed the expertise of CDE Global to design and supply a multi-sands plant for use at their quarry in Bonnyrig, Midlothian.

Owned and operated by Graeme Nicholson & Phil Kerr, the company currently process natural sand and gravel products in order to create quality sports sands, concrete sands and asphalt sands.

A CDE EvoWash Multi Sands Plant was chosen for this specific process. The equipment is a complex configuration of sumps, cyclones, dewatering screens and a unique Counter Flow Classification Unit (CFCU) which allows for the production of many specialist sand grades.

The high quality by-product of concrete and asphalt sand is currently sold locally in the Mid-Lothian and Edinburgh region. The commercially valuable sand which is produced as a result of CDE’s efficient plant capabilities is used for sports sands that are currently used by major golf courses throughout Scotland, namely St.Andrews, Loch Lomond and Gleneagles.

The modular design of the CDE EvoWash sand washing plant facilitates highly accurate separation of silts and clays from the final washed sand product. For Independent Aggregates, the employment of a fines recovery plant with integrated hydrocyclone technology has allowed them to produce a quality dewatered sand product with low moisture content, ready for the marketplace straight from the belts.

David Kinloch, CDE Regional Sales Manager for Scotland highlights, "The EvoWash sand washing plant employs a process using a series of cyclones, upward flow classification tanks and sieve bends to produce three different products - a lignite free concrete sand, building sand and a waste lignite contaminated sand. For Independent Aggregates, this process has eliminated the costs of expensive pond dredging to recover quality sand which would otherwise be lost if old sand washing technologies were employed."  

Independent Aggregates Case Study