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Case study


What would we do without roads? It’s virtually impossible to imagine a world without them, such is their importance to the globe’s transport infrastructure and our everyday existence. Millions of miles of roads criss-cross our planet in every conceivable direction and hardly a day goes by when a new one isn’t being laid or an existing one isn’t being upgraded.

Most roads are built using asphalt cement/bitumen as one of the main ingredients. These asphalt pavements are mostly composed of crushed stone, sand and gravel, with a small amount (5 percent) of asphalt cement, which acts as a kind of glue to hold everything together. More than 90 percent of the world’s paved road network has an asphalt surface and the product is 100 percent recyclable.

Anyone who has driven by roadworks will have noticed that most of the asphalt pavements are constructed using the hot process known as hot-mix. This requires a significant amount of fuel to keep everything hot during production and paving. Apart from the CO2 emissions from the burning fuel, these high temperatures also generate fumes.

In an effort to improve the environmental impact and working conditions of hot-mix paving, AkzoNobel’s Asphalt Applications business (part of Surface Chemistry) has introduced Rediset WMX. These additives significantly reduce the mixing and paving temperatures, which results in lower asphalt fumes, providing better working conditions for the paving crew. The temperature reduction also results in significant fuel savings and reduces operational costs due to ease of mixing and compaction. Rediset WMX additionally increases moisture resistance, which can prolong the life of the asphalt pavement.

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