Innovation case studies

Repave is a hot in situ recycling process for rejuvenating and resurfacing existing surface courses on carriageways and airfields. It minimises the need to remove existing material to go to landfill. Our Repave process is the only in situ surface course recycling process that is currently available in the UK.

Retread is a cold in-situ recycling process which reconstructs the entire carriageway or footway surface to a depth of 75mm. With increasing focus on sustainability, Colas’ Retread process offers a low CO2 emission alternative. By reducing the output of energy, emissions and waste, Colas are able to aid clients in significantly lowering their carbon footprint and cost.

In 2014 leading infrastructure asset management company Amey won a second five-year term as Network Rail’s (NR) sole external supplier of civil examinations, and retained a major footprint in rail structures assessments. The company inspects and reports on the condition assets in the utilities, highways and rail sectors, including over 100,000 assets that make up the vast majority of the UK’s rail network.

Ralumac HT was chosen for this scheme due to it being a BBA approved double coat, single pass application. The first coat regulates and seals the existing surface, followed by a second coat using a 10mm aggregate. After compaction and embedment the total thickness of this process was 18mm thick, giving the client reduced levels compared to using a traditional overlay.