Sheehan’s opens new construction & demolition recycling plant plus holds open days

Sheehan’s opens new construction & demolition recycling plant plus holds open days : 11th to Friday 14th September 2012

Oxford based Sheehan Haulage & Plant Hire, in conjunction with CDE Global, is holding a series of open days from the 11th to 14th September 2012, to showcase its newly commissioned construction & demolition waste recycling plant.

With sustainability and recycling high on the agenda of Government and Local Authorities across the UK, Oxford based public works and civil engineering contractors, Sheehan Haulage & Plant Hire, recently installed a new construction & demolition waste recycling plant.

The new multi-million pound facility, which was more than five years in the planning, was manufactured, installed and commissioned in June 2012 by CDE Global, the world leading supplier of washing equipment for quarries and mines, at Sheehan’s 150 hectare ‘Dix Pit’ recycling site on the outskirts of Stanton Harcourt in Oxfordshire.

As a result of the investment, 100,000 tonnes per year of construction & demolition waste from Oxford and the surrounding areas will be diverted from landfill and turned into high value construction aggregates, recycled sands and sub soil. The facility will be used to process construction, demolition and excavation waste from Sheehan’s own projects with additional waste being accepted from as far afield as Greater London. The output is turned into re-useable materials for future construction projects – 50% of which Sheehan’s currently uses on its own projects.

The new CDE Global waste recycling plant is able to process general building rubble, excavation and demolition material into a range of clean aggregates and shingles. These include 3.3mm, 6mm, 10mm, and 40mm grades, which primarily can be used for pipe bedding, with ranges of washed general building sand, fine grade soil and vibro piling material also being produced. In addition, the plant is able to remove other erroneous matter, including wood, plastics and metals which are then sent on for further recycling, while extracted water is reused and re-cycled as part of the washing process.

“Sheehan’s is striving to be better environmental stewards, and we endeavour to sustain natural resources wherever possible,” states Tara Sheehan, Financial Director of Sheehan Haulage & Plant Hire. “By processing all of our own construction & demolition waste and increasing the volume of local third party waste, we are already able to produce and supply recycled sand and sustainable aggregates to many local companies, in addition to meeting much of our own requirements for construction materials in the region.”

The construction & demolition waste is initially loaded into a feed hopper of the CDE Global solution and ferrous material is removed by an overband magnet and pre-screened to remove other erroneous material. Following an initial rinsing through an Aggmax™ unit to liberate sand particles, these are then sent to an Evowash™ unit for the first washing phase. Larger pre-screened material is then sent to the Rotomax™ logwasher for scrubbing and material is discharged to a dewatering screen, with further liberated sand particles recovered for final aggregate rinsing.

The screened and washed aggregate is then discharged to the triple deck Prograde™ that grades aggregates into 5-10mm / 10-20mm / 20-40mm / +40mm material. Waste water is re-cycled and filtered through the Aquacycle™ thickener with silt particles being removed and the waste sludge sent to a concrete buffer tank. Further filtering that creates a filter cake of approximately 90% dry solids content and all residual water is recycled back to the washing plant.