Factors affecting raveling of motorway pavements—A field experiment with new additives to the deicing brine

• Large-scale field experiment on raveling of motorway pavements.
• The influence of different factors on raveling is estimated by statistical modeling.
• Asphalt age, initial raveling, and heavy traffic are the most important parameters.
• The novel additives to the de-icing brine reduce both winter and annual raveling.

Recently, a novel additive to the de-icing brine has been introduced. It reduces raveling, i.e., the loss of stones of aggregate from asphalt road pavements. To assess the scale of this reduction, a field experiment was conducted. It lasted for two years and consisted of repeated measurements of 540 lane km of motorways in three European countries. Tailored statistical models were used to elucidate the relative importance of different factors influencing raveling—the novel additive, traffic intensity, asphalt age, and initial raveling. The reported results and predictive models are coupled with a detailed accuracy analysis.

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