Hanson has been trialling carbon-absorbing asphalt on a road resurfacing project in south west England.
Its CarbonLock asphalt, containing polymer modified bitumen (PMB) bio-binders, has been used to resurface the A30 Cutteridge to Alphington eastbound scheme near Exeter, in partnership with National Highways.
Two trials are being carried out. The first includes Nynas’s biogenic binder Nypol RE and the second uses the same asphalt mixture but includes Shell’s new bio-component binder Cariphalte CarbonSink.
Both asphalts were produced at Hanson’s Hingston Down plant and laid by Hanson Contracting. Each trial consisted of a 40mm thickness surface course with 53 PSV aggregates for around 500 metres of both lanes of the eastbound carriageway.
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