Nynas news

15/11/2018 13:33

Cold mix durability

Information from the study of a cold mix asphalt pavement in Sweden that has been in place for 15 years provides invaluable insight into the durability of the material used.

Returning to roads paved with cold mix asphalt some 15 years earlier, a group of scientists were amazed to find that these asphalt surfaces were still in very good condition even after a decade and a half of service.

The results of the study that followed were presented in the form of a poster at the 6th Eurasphalt & Eurobitume Congress in Prague by Roger Lundberg from NCC Roads, Torbjörn Jacobson, Trafikverket, and Per Redelius and Jenny-Ann Östlund from Nynas.

The roads laid with cold mix asphalt still look surprisingly good, and a closer investigation of drill cores taken from the roads have confirmed that the surfaces are in good shape. In spite of a high void content in the asphalt, the condition of the asphalt pavement is still very good.

The study established that the hardening of the road surface, which normally builds up over time, had in fact occurred mainly during the first two years. In addition, tests carried out on the binder recovered from the drill cores indicated that the material had deteriorated only very little over the years.

Calculations also show that the energy consumption and carbon dioxide release during production and paving can be halved if cold mix asphalt is used instead of a conventional hot mix (see table).

The study also revealed that the type of mineral used in the asphalt blend has a significant impact on the breaking and curing rate and this gives valuable input into how the cold mix technology can improve even further.

Jenny-Ann Östlund, Technology Manager, Nynas Bitumen.

Further reading

New Arctic oil

A trusted supplier of transformer oils for extremely low temperatures and severe weather conditions, Nynas has developed a complete line of Arctic grade oils which comply with the toughest climate conditions.

Read more about New Arctic oil

The brains of Nynas: Rogier van Hoof

Head of Secondary Distribution since 2011, Rogier oversees and coordinates transport-related (when the product ends up on wheels) issues across the globe with suppliers, naphthenic affiliates and customers. He joined Nynas in 2005 as General Manager Naphthenics Benelux, after having worked for 20 years at a major French oil company. Rogier holds a Master’s degree in Business Management, and has also studied Mechanical Engineering. Find out what's on his mind.

Read more about The brains of Nynas: Rogier van Hoof

A versatile material

The world’s third most widely used synthetic plastic polymer, polyvinyl chloride (PVC), is used in a large variety of construction materials as well as in many other applications such as bottles, packaging and inflatables. By using Nynas naphthenic oils as an external lubricant additive in PVC, the material’s performance is significantly improved.

Read more about A versatile material