‘Our performance statement covers the production of a range of products from the new plant to agreed specifications: 0–4mm concrete sand 0–2mm building sand 4–10mm, 10–20mm and 20–40mm aggregates and a +40mm oversize.’ ‘Raymond Brown were looking for performance guarantees that gave them confidence in the capability of the plant to tackle high fines and clay content in the feed material and produce a range of washed sand and aggregate products that would meet their customers’ requirements,’ explained CDE’s technical manager, Chris McKeown.

CDE conducted extensive material testing prior to specifying the plant and the vast majority of material being processed is in the –63mm range, with 80% typically passing 20mm. Material is delivered to the plant via an M14 feed hopper with 150mm grid spacings. The new washing plant at Roke Manor will process sand and gravel at a rate of 80 tonnes/h and includes several items of equipment from the CDE portfolio, including an AggMax modular log-washer, EvoWash sand washing plant, AquaCycle thickener and decanter centrifuge, as well as a feed hopper and transfer and stockpile conveyors. We pride ourselves on our sustainable and proactive approach in dealing with our environmental, social and economic impacts.’ Speaking about the Roke Manor development, chief operating officer Steve Clasby said: ‘This is an exciting new opportunity for Raymond Brown. The site is located 11 miles from Southampton on the outskirts of the New Forest and it was the sensitivity and environmental responsibility displayed by Raymond Brown which resulted in the successful planning application. The permission is accompanied by a 30-year woodland management plan that involves additional tree planting in line with an approved landscaping plan that formed part of the planning permission.

‘Our licence will see us extract 750,000 tonnes of sand and gravel at a rate of 125,000 tonnes per year.’ ‘The new site was seven years in development and planning permission was granted in 2011,’ explained Richard Hoare, project manager at Raymond Brown.

Decanter manor matters