Product category:
Ground Engineering
News Release from: Tensar International | Subject: Tensar Glasstex solution
Edited by the Buildingtalk Editorial
Team on 09 January 2007
Tensar Technology extends highway life
via refurb
Tensar Glasstex solution used to stabilise the retard cracking, which enabled them to replace the top asphalt layers and seal the cracks during five nights of work.
The A14 is a major dual carriageway trunk road through Suffolk, but extensive reflective cracking of the asphalt surface on 1800m of the west bound carriageway near Beyton was threatening its early closure for reconstruction To minimise disruption to the public and commercial users and extend the life of the road, the contractors adopted a Tensar Glasstex solution to stabilise the retard cracking, which enabled them to replace the top asphalt layers and seal the cracks during five nights of work
This article was originally published on Buildingtalk on 15 Jul 2003 at 8.00am (UK)
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Transverse reflective cracking had occurred at intervals over the length of the westbound carriageway.
Cores taken through the pavement showed it was constructed from 150mm of asphalt over 250mm of lean mix concrete.
As geosynthetics had not previously been used within the Highways Agency's Maintenance AREA 6, the specifier, Atkins, obtained a departure from standard for this contract.
This specified the use of the Glasstex pavement reinforcement fabric comprising a grid of glass fibres stitch bonded on to a needle punched fabric.
The work - which was carried out overnight using carriageway closures, traffic management and a diversion route - included planning off the top 100mm of the asphalt, sealing the cracks and then laying nearly 7000m2 of the Glasstex reinforcement.
For speed, specialist installer Foster Contracting sprayed a neat bitumen binder, on top of which they immediately machine laid the Glasstex as it was important to maintain the progress of the contract.
The paving contractor, Lafarge, then laid a 60mm course of binder directly over the geocomposite followed by 40mm of asphalt surfacing and 3.3km of road marking and reflective stud replacement.
"The speed and ease with which Tensar's Glasstex solution could be installed enabled the contract to be completed on time with no snagging or outstanding issues," says Ray Wicks of Foster Contracting .
"In turn this meant minimal disruption to the public and no consequent extra costs; all of which are key concerns with any high profile public sector scheme".
Client: Highways Agency.
Specifier: Atkins.
Main Contractor: Amey Mouchel.
Paving Contractor: Lafarge.
Glasstex Installer: Foster Contracting .
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