Aggregate Recyclers Turn to Terex Supertrak Screen

A Terex Finlay 694 Supertrak is driving forward productivity at Scratchwood Depot near London, where a joint venture between Lafarge Aggregates and GRS Roadstone has been developed to recycle construction and utilities waste, according to a Terex Finlay press release.

The 694 screen is reclaiming concrete, stone and masonry into five grades of recycled product at the site, which is located on the outskirts of North London, where demolition, crushing and recycling contractor Haigh has been contracted by GRS and Lafarge to crush and screen the material.

Haigh has invested in new machinery to deliver the contract, including the 694 screen, which is central to the project’s operation, the release says. Currently, 240,000 metric tons of waste material per year are scheduled for reclamation at the site. Once processed, the material leaving Scratchwood is used for a variety of construction-related products, including the manufacture of concrete that contains part-recycled materials, in line with the recent British Standard BS 8500.

The material leaves the 694 screen in sizes of plus 40 millimeters, 40-25 millimeters, 25-20 millimeters, 20-10 millimeters and minus 4 millimeters. The screen’s double-deck vibrating grid head system scalps off the plus 40 mm, which is then re-crushed, for maximum efficiency, according to the press release.

Jon Fisher, regional director of GRS Roadstone for the London and Southeast, says, “By producing more single-size products, the material is much more marketable and, as a result, the 694 drives more value out of the waste goods. The screening process is proving very accurate and the 694 offers a 20-foot deck, providing a good deal of space to enable more material to get through. This machine was the best choice for us in terms of productivity and performance and it is backed up by Finlay Plant South East’s comprehensive on-site service and support program.”

Leon Sheehy, managing director of Finlay Plant South East worked with Haigh and GRS Roadstone to introduce the Terex Finlay 694 Supertrak on the site.

A number of options were specified under the purchase, including a Caterpillar engine, the Terex release says. Mobility was also important and Haigh chose the 694 on tracks for on-site mobility and a separate, purpose-built bogey to enable the plant to be transported to other locations where necessary, without the need for a low loader.