Particulate matter mass concentrations produced from pavement surface abrasion

According to the latest findings particulate matter belong to the most significant pollutants in Europe together with ground-level ozone O3 and nitrogen dioxide NO2. Road traffic is one of the main sources of particulate matter. Traffic volume has unpleasant impact on longevity of the pavements and also on the environment. Vehicle motions cause mechanical wearing of the asphalt pavement surface - wearing course by vehicle tyres. The paper deals with abrasion of bituminous wearing courses of pavements. The asphalt mixtures are compared in terms of mechanically separated particulate matter. The samples of asphalt mixtures were rutted in wheel tracking machine. The particulate matter measurements were performed in laboratory conditions. The experimental laboratory measurements make it possible to sample particulates without contamination from exhaust emissions, abraded particles from vehicles, resuspension of road dust and climate affects. The paper offers partial results of measurements on six trial samples of asphalt mixtures with different composition. It presents particulate matter morphology and the comparison of rutted asphalt samples in terms of PM mass concentrations and chemical composition

Mass Distribution of Particulate Matter Produced During Abrasion af Asphalt Mixtures in Laboratory

Non-exhaust emissions of particulate matter from road traffic can come from abrasion of vehicle parts (tyres, brake linings, clutch and bodywork) or from pavement surface abrasion and also from resuspension of dust. A differentiation between PM emissions from road pavement abrasion and resuspension is very difficult due to their similar elemental composition. The research is focused on abrasion of pavement surface from asphalt mixtures. Experimental tests are conducted for measuring of particulate matter production in the atmosphere during the rutting of various asphalt mixtures used for wearing courses. The tests are performed in wheel tracking machine in the laboratory. Particle sampling in the laboratory makes it possible to sample PM with very low contamination from surrounding sources and no influence from exhaust emissions. The paper presents an example of the results of measurements on six trial samples of asphalt mixtures with different composition