Insitu recycling of a damaged road surface near Peterborough provided a perfect solution for the local environmentally friendly council.
This is part of a report published in the Highways magazine June 2008. I won’t publish it all here for copyright reasons. (It may be available at http://www.highways-mag.co.uk/ )
Cambridgeshire County Council is believed to be the country’s leading county for recycling waste materials and recently demonstrated and reinforced its commitment to the policy. The county’s highways service, in conjunction with its Term Maintenance Services partner Atkins, which forms Cambridgeshire Highways, has opted to recycle in-situ a 2km stretch of the B1040 road, which runs parallel to and directly alongside the River Nene at Ramsey St Mary’s, about 20km south west of Peterborough. The road mainly takes agricultural vehicles and is the only means of access to several residential and agricultural properties.
Cambridgeshire Highways considered three reconstruction options for this particular site. These were traditional reconstruction, where the existing material is excavated and replaced by new, ex-situ or off site recycling, where the existing material is removed to a mobile mixing plant for blending prior to returning to site, and in-situ recycling, where the existing material is recycled in place.
In-situ recycling was used and the author states that it was found to be much faster, cheaper, much less disruptive to traffic and far more environmentally acceptable with a carbon footprint considerably less than off site recycling or normal reconstruction methods. Off site or ex-situ recycling and traditional reconstruction techniques require vastly more lorry movements to transport materials to and from the site. Also in-situ recycling, unlike conventional repairs, does not generally require the disposal of surplus material or the importation of large quantities of new materials.
This is what Site Waste Management Planning is about.