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      Gresham Gravels case study

      Material source:

      Feed material with a high sand-to-stone ratio with over-burden clay issues.

      Equipment installed:

      Terex®Aggwash 60 modular wash plant, Powerscrub™

      Project requirements:

      To deliver a low level, low ground pressure footprint, high capacity, high efficiency processing plant that provides two premium grade sands and three quality aggregates at 60tph.

      Duo’s solution:

      Acquire information on Gresham Gravels’ feed material, end-user, and market demands, then develop a client specific solution. This involved supplying a plant that has the capability to process the clay over-burden and increase the efficiency and capacity of the previous fixed plant. The end result – an innovative and compact design that provides the ability, especially on sand production, to have ultimate flexibility: making two sands at varying cuts – 0-4mm concrete sand and a 0-2mm fine sand, whilst efficiently dealing with the over burden clay.

      Project success:

      A totally self-contained plant with the flexibility to develop and evolve as market trends change, this operation presents an ideal plant solution for sites that need to increase their overall profitability.

      John McGlinn – Duo Sales Manager, commented, “After initial conversations and the realisation that in the past Gresham Gravels had to be selective when choosing where material was dug due to the clay content in the over-burden layer, it was easy to recommend the Terex®Aggwash 60 with a logwash to break up the clay. The team had to pre-screen materials in as part of its previous operation, therefore I was confident that Duo could not only save them time, but make the whole operation more efficient – producing more sale-able material.”

      Nicholas Deterding – Gresham Gravels’ Managing Director, commented, “The system really works very well. We specifically tested the plant in a heavy clay area, and the plant processed everything efficiently, which makes life a lot simpler. We can now process all of the over-burden layer and our sale-able product has increased. We were already fortunate enough to have a very low overall silt content of 4% and we now have the ability to market material that we had previously only sold as sand fill.” 

      John McGlinn, further commented, “The Terex® Aggwash 60 is an ideal plant for this type of operation at Sheringham, offering a fully modular, pre-wired and pre-plumbed electric powered wash plant that will fit in a relatively small footprint. With a heavy-duty robust build, it is in its element within rugged operating environments and with a quick set-up time (approximately 1 week) it offers an environmentally friendly operation with zero exhaust emissions.”

      Nicholas, concluded, “We have had no quality issues with the material sold, the end-product results in sand with 12% moisture which can go pretty much straight onto a truck. It’s a great plant that supplies us with very sale-able products.”