Slitage av och partikelemissioner från betongbeläggning

Bengt-Åke Hultqvist

This report aims to study wear and the formation of inhalable particles from concrete coating, concrete coating with mixed in titanium dioxide (TiOmix) and from a reference asphalt (SMA16) under controlled conditions in the VTI road simulator (PVM). All coatings used the same rock material, a granite with ball mill value 6. Wear tests showed that the TiOmix wore most, due to the poor strength properties caused in manufacturing the slabs. The asphalt was initially more worn than the concrete, but after about 250 000 rounds in the PVM it was at the same wear rate as the concrete. Particle formation was higher for the concrete that that of the asphalt. PM10 from concrete contained substantially more calcium than PM10 from asphalt, indicating that the cement in the concrete is an important particle source. Ultrafine particles emitted, after initial high emissions at any speed increase, to a lesser extent from the concrete and TiOmix than from asphalt. The concentrations of PAHs are lower in samples from concrete coating, which may indicate that a part of the PAHs are derived from bitumen. However, the difference may also be due to different PAH content from the tires used.



Millions for research into maritime transport and the environment

Maritime transport is a major source of emissions of harmful air pollutants and carbon dioxide. In a new project, a research team from the Swedish National Road and Transport Research Institute (VTI) and the University of Gothenburg has received SEK 6.4...


New research programme for more efficient travel

The Swedish National Road and Transport Research Institute (VTI) is playing an important role in a major new research programme to find radical solutions leading to fewer trips and more efficient travel, along with tools to enable better use of roads and...


Simulator used to practice emergency responses safely

Emergency responses of the police, ambulance, and rescue services are associated with a high risk of accidents, but practicing them in real traffic is neither safe nor permissible. A simulator-based method developed by the Swedish National Road and Transport...


Simulation of cut-in by manually driven vehicles in platooning scenarios

A study in a VTI-driving simulator has showed that a platoon will be able to handle a cut in from a manually driven car. The results of this study have recently been presented at two conferences in Japan.



The five-year anniversary of European Road Profile Users' Group (ERPUG) Forum will take place at Ramboll head quarter, Copenhagen, Denmark October 19-20, 2017.


Self-driving buses in Sweden next year?

A self-driving, fossil-free bus. This idea might become reality through a forthcoming collaborative project involving the Swedish National Road and Transport Research Institute (VTI), Linköping University and several other participants. The project group aim...