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Monday, 16 September 2019
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Raw materials & technologies, Applications

By mimicking nature, additive protects roads against frost damage

Friday, 31 October 2014

AkzoNobel has launched an additive for road salt which helps to protect against frost damage and makes driving safer.

The product encourages the formation of slushy ice, which reduces the risk of damage. Mike-Fotografie/Fotolia

The product encourages the formation of slushy ice, which reduces the risk of damage. Mike-Fotografie/Fotolia

Inspired by the ability of certain animals to withstand cold and prevent ice forming in their bodies, "Ecosel AsphaltProtection" is a fully biodegradable additive for de-icing brine. It works by slowing the freezing process, resulting in soft, slushy ice, rather than hard, abrasive ice. After in-depth research and development, the product is available to customers in Italy and the Netherlands.

"Adding the product to normal winter road salt can reduce frost damage by around 50 percent," explained Werner Fuhrmann, member of the AkzoNobel Executive Committee responsible for Specialty Chemicals. "Municipalities and governments will substantially benefit from the results - less need for road repairs, fewer traffic jams, lower maintenance costs and greater road safety." He added that by extending the service life of roads, CO2 emissions will also fall, not only because of fewer traffic tailbacks, but also because there will be a reduced need for materials and energy for maintenance. "The additive not only protects people and the planet, it also makes economic sense as it brings down the total cost of ownership," continued Fuhrmann. "In addition, launching this product further highlights our strategy of sustainable innovation and represents the latest addition to our growing portfolio of eco-premium products."

Researchers tackle the repeated freeze-thaw cycles

By mimicking nature, AkzoNobel researchers were able to tackle the repeated freeze-thaw cycles that affect asphalt mixtures. Water trapped inside asphalt expands by about 9 percent when it freezes, breaking up the road itself. Passing traffic then further accelerates the damage. "Ecosel AsphaltProtection" works by preventing the water trapped inside the asphalt pores from turning into hard ice. It encourages the formation of slushy ice, which is mechanically weaker than the asphalt and therefore substantially reduces the risk of damage. Destined to be a key contributor to the Sustainability and Transportation pillars of the company's Human Cities initiative, the new product was successfully tested in cooperation with the Dutch, Danish, Swedish and Austrian road authorities.
 

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