New technologies enable the manufacturing of asphalt at reduced temperatures. As a result The energy consumption per ton of asphalt and the emissions at the road construction site drop significantly. Whilst conventional asphalt is produced at around 170 ° C, the low - temperature processes of today allow production temperatures of around 100 ° C. Various technologies for this are ready for application by road construction industry. Foam bitumen, waxes and other additives, special bitumen or alternative mixing cycles can be suitable for use, depending on the application. Changing the way of asphalt production in an industry takes several years or even decades. In this paper, we will present low temperature asphalt technologies based on the promising technology of foam bitumen and how they are applied in practice.
This paper reviews modern technologies for the recycling of asphalt, which is a key element for effective use of resources. The major goal of the industry is to create a true recycling, meaning that the reclaimed asphalt is used in the same road layer where it has been used before. This requires the ability to produce high-quality asphalt while incorporating high-ratios of reclaimed asphalt. Depending on the situation of the regional road construction industry different strategies for re-using reclaimed asphalt are appropriate. In this paper, we provide an overview on best practices for recycling on asphalt mixing plants.
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