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Bitumen for paving applications

21/05/2014 11:24

Leiths chose Nynas Nypol 103

A stretch of the A90 in Scotland now has an innovative thin layer wearing course featuring PMB.

A new Scottish specification for stone mastic asphalt could help with some of the durability issues sometimes experienced in the UK

An alternative specification for stone mastic asphalt has been used on the A90 in Scotland, with tests suggesting that the material will be more durable than thin surfacing produced under the standard UK specification, Clause 942 of the Specification for Highway works.

Leiths offered an alternative, a material that would meet all of the contract requirements Plus also meet TS 2010. “It was decided to proceed with two SMA mixes, a 10mm and a 6mm using local granite aggregates of PSV56, laid to a target thickness of 35mm,” Neil Anderson, technical director of Leiths Group, says. For the polymer modified bitumen Leiths used Nynas Nypol 103, a highly modified elastomeric binder which demonstrates substantial resistance to deformation and cracking.

Read the entire article in World Highways

Further reading

Nynas blasts through the boundaries

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Nynas has received the coveted EcoVadis Platinum CSR rating, this puts the company in the top 1% for sustainability performance.

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Nynas invests for reliable production and reduced GHG emissions

Nynas is investing SEK 190 million to secure the supply of bitumen for the Nordic infrastructure. At the same time, carbon dioxide emissions can be reduced by 34%.

Read more about Nynas invests for reliable production and reduced GHG emissions