Your browser is no longer supported

For the best possible experience using our website we recommend you upgrade to a newer version or another browser.

Your browser appears to have cookies disabled. For the best experience of this website, please enable cookies in your browser

We'll assume we have your consent to use cookies, for example so you won't need to log in each time you visit our site.
Learn more

Fast, mobile repaver scores for Colas

Colas’ Repave pavement recycling machine has travelled back and forth between Scotland and England this year, in response to strong demand.

Colas’ Repave pavement recycling machine has travelled back and forth between Scotland and England this year, in response to strong demand.

Repave projects have been completed on principal roads in the East Midlands, Teesside and Southend in 2010, between jobs in South Lanarkshire and Inverness.

The plant consists of an array of 32 gas burners for heating road surfaces arranged in front of four rows of overlapping steel tines and a levelling screed.

The machine separates into two main sections for transport on flat bed and low loader trailers and, according to Colas, can be rapidly reassembled.

South Lanarkshire Council has used Repave on principal roads at two locations in the Hamilton area this year, following three similar schemes in 2009. Council network team leader for the Hamilton area, Alan Cunningham, said Repave has attracted considerable interest from other authorities, including Transport Scotland, partly due to the speed of the technique.

5m a minute

The machine moves while in operation at around 5m per minute; quicker than conventional paving equipment. In a single pass the Repave machine heats and scarifies worn or cracked and crazed asphalt down to a depth of 30mm, ahead of a paver laying a new 20mm to 30mm layer of asphalt immediately behind (instead of planing out and replacing a 50mm layer). Durability is ensured by a “hot weld” created between the recycled and new material, which creates a homogenous pavement with no cold horizontal joint.

Cunningham said South Lanarkshire chose this technique because it reduces the cost of new material by 40%. It also and cuts vehicle movements and CO2 emissions.

One of South Lanarkshire’s projects carried out by Colas was on a stretch of dual carriageway close to the M74; a site constrained by Hamilton’s racecourse and football ground and a college, university and a public park.

“Our main concern was to get this job done quickly with minimal disruption. The whole job [3km of one side of the dual carriageway] took just seven days, which is impressive if compared to the estimated time for traditional reconstruction,” said Cunningham.
He adds that the technique is well suited for treating roads that have a damaged surface over a good underlying structure.

Have your say

You must sign in to make a comment

Please remember that the submission of any material is governed by our Terms and Conditions and by submitting material you confirm your agreement to these Terms and Conditions. Please note comments made online may also be published in the print edition of New Civil Engineer. Links may be included in your comments but HTML is not permitted.