Effekter av dammbindning av belagda vägar

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Per Jonsson
Martin Ferm

Inhalable particles from road dust is a health problem and a major cause of the environmental quality standard for particles in outdoor air not being reached in Sweden. Formation of road dust along paved roads in the Nordic countries is largely related to the use of studded tires and winter operation of highways, such as sanding and salting. To reduce dust suspension chemical dust control is sometimes used, meaning that a chemical solution is sprayed onto the road which is thus kept moist and dust is prevented from whirling up. Mainly, chloride salts are used, but also more environmentally friendly alternatives have been tested. All are stated to operate for dust control, but some problems have arisen with friction reduction, which have contributed to the uncertainty surrounding their use. The purpose of this report is to investigate which dust control agents that have the best effect, while not compromising road safety by reducing friction. A literature survey on the effects of dust control agents was made prior to field trials in this study. This survey is annexed to this report. In the field experiments four dust binders were tested; calcium chloride (CaCl2), magnesium chloride (MgCl2), calcium magnesium acetate (CMA) and sugar solution on a road south of Linköping.

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