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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 reorganisation completed

Today, the decision to adopt Nynas composition from 30 November 2020 became final in Södertörn District Court. This means that Nynas company reorganisation is formally completed and that Nynas creditors will be paid in accordance with the composition agreement.

Read more about Nynas reorganisation completed

Nynas reorganisation formally expected to be completed in January 2021

The district court's decision of 30 November to confirm the composition in Nynas AB's corporate reorganisation has been appealed by the Swedish Tax Agency on 21 December. Extraordinary reasons have since been applied based on approval of the administrators as of 22 December 2020 and Nynas has today paid in full to the Swedish Tax Agency and thus the Swedish Tax Agency no longer has any claim.

Read more about Nynas reorganisation formally expected to be completed in January 2021