Low carbon asphalt trialled on Devon road

An innovative low-carbon asphalt is in use for the first time in work to resurface the A30 Cutteridge to Alphington near Exeter in Devon.

The work is taking place as part of Hanson Contracting’s pavement framework agreement with National Highways.

It is the first time Hanson has run a trial of its CarbonLock asphalt, which contains polymer-modified bitumen (PMB) bio-binders, on the strategic road network.

Two low-carbon asphalt trials are underway.

The first trial includes Nynas’s biogenic binder Nypol RE.

Meanwhile, the second trial uses the same asphalt mixture but includes Shell’s new bio-component binder Cariphalte CarbonSink.

Both low-carbon asphalts were produced at Hanson’s Hingston Down plant.

Each trial comprised a 40mm thickness surface course with 53 PSV aggregates for around 500m of both lanes of the eastbound carriageway.

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