Product category:
Architectural Services
News Release from: Mouchel | Subject: New recycled road surface
Edited by the Buildingtalk Editorial
Team on 25 October 2007
Joint venture pioneers recycled
surfacing
Tarmac and Mouchel joint initiative on behalf of the Highways Agency has pioneered a new recycled road surface on the national network.
The material has been used as part of a resurfacing project which, for the first time on the national highway network, has seen nearly 800 tonnes of existing porous road surface course material recycled into the new road surface - setting the standard for recycling on future major schemes It is highly unusual to reuse existing material, usually of unknown origin and lower quality, in thin and high quality surface asphalts - which need to offer high Polished Stone Values (PSVs) for good skidding resistance
This article was originally published on Buildingtalk on 26 Feb 2007 at 8.00am (UK)
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After Tarmac and Tarmac-owned planning company NRP removed some 270 tonnes of existing surfacing per night for 12 nights, it was taken in lorries that would have otherwise returned empty after delivering asphalt to site, for special processing at Tarmac's Hayes asphalt plant - including screening to remove oversized aggregate.
Each batch of recycled material was then re-laid on the next night - forming a quarter of the 3,255 tonnes of new 14mm aggregate 'Tarmac MasterPave' surfacing over 30,000 square metres laid at junction seven on the M25.
The remaining existing material was routinely recycled by Tarmac for use in base and 'bindercourse' materials.
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Tim Smith, Tarmac's Technical Manager London and South East said: "Working towards a sustainable future requires innovation in process and creativity in thinking".
"After extensive lab tests and practical trials we demonstrated that the new surface would meet the high performance standards needed - for Polished Stone Value (PSV), texture depth, deformation resistance and durability".
"The innovative approach has enabled us to cut the volume of virgin material required for the resurfacing work and put the existing material to best possible use".
Steve Smith Project Manager for Mouchel's M25 Sphere Small Works Team said: "I am delighted that we have been able to work closely with Tarmac in developing a strategy for dealing with materials that would otherwise go to waste".
"These could be the first steps in changing the way we approach the renewal of the Highways Agency's road network".
Tarmac is working in conjunction with Mouchel, the Highways Agency's Managing Agent (M25 Sphere), and main contractor Carillion.
Mouchel has commissioned the Transport Research Laboratory (TRL) to report on the environmental and financial benefits of the approach, with the TRL's report due in early October.
The innovative approach was approved and supported by the Highways Agency, following an application by Mouchel for a 'departure from standards' as the specification allowed a maximum 10 per cent of recycled material in the surface course.
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