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

Producers choose Nynas NYTEX® oils to boost polyurethane polymers

NYNAS® has developed a series of NYTEX® process oils to improve the performance of polyurethane polymers used in plastics and resins, offering cost efficiency and enhancing a range of everyday products that are found all around us.

Read more about Producers choose Nynas NYTEX® oils to boost polyurethane polymers

Nynas expert re-elected as Chairman of the IEC Technical Committee 10

Nynas Senior Technical Advisor, Dr Bruce Pahlavanpour, will continue to chair the prestigious International Electro Commission (IEC) Technical Committee 10 (TC 10) for a further three years.

Read more about Nynas expert re-elected as Chairman of the IEC Technical Committee 10

Nynas launches process oil for low temperature ink production and silicone fluid replacement

By introducing NYFLEX® 2120B, a hydrotreated, very low viscosity naphthenic oil, Nynas is providing a process oil ideal for use as a printing ink distillate in heatset formulations, as well as a reliable and cost-efficient alternative to traditional silicone fluids.

Read more about Nynas launches process oil for low temperature ink production and silicone fluid replacement