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.



Cost Benefit Analysis (CBA) workshop in Stockholm

An open seminar and workshop in Stockholm will be held on 25-26 April 2018. The workshop deals with the use of CBA as a basis for decision-making in the public sector. The workshop is organized by, among others, Professor Jan-Eric Nilsson, VTI.

The 6st Humanist Conference

The 6th HUMANIST Conference will take place 13-14 June 2018 in the Hague, The Netherlands. The scope of the conference covers a wide range of topics on Human Factors in Transport. Tania Willstrand and Alexander Eriksson will present their research results.



VTI will develop simulators for ambulance staff

VTI has initiated a pilot study for paramedics with the Centre for Teaching & Research in Disaster Medicine and Traumatology and Linköping University. The aim is to give ambulance staff the opportunity to practice critical medical tasks in a moving vehicle in...


Unique electrified road opens in Sweden

The world’s first electrified road recharging the batteries of cars and trucks while driving opened in Sweden. The Swedish Minister for Infrastructure, Tomas Eneroth, was at the formal inauguration of the electrified road on April 11, 2018. VTI is one of 22...


Swedish road safety spreads internationally

Sweden is a leading country in terms of road safety, and the research conducted by the Swedish National Road and Transport Research Institute (VTI) has contributed to increased safety. VTI’s remit includes disseminating research results and keeping up to date...


A greater understanding of cyclists' behaviour

Cyclists are often accused of not following traffic rules and being hooligans on the road. New research shows that there is no support for this perception. "Our observations reveal no such general anarchy" says Sonja Forward, researcher at VTI.


New technology for road surface measurement tested

VTI has tested a new scanning-laser technology for road surface measurement. The tests show the new technology for comprehensive transverse-profile measurement provides dependable values in measuring transverse profile and rut depth.


Ulf Sandberg has been presented with the TTI Lifetime Achievement Award 2018

VTI’s Senior Research Leader Ulf Sandberg has been presented with the TTI Lifetime Achievement Award 2018 for his work on research into tyres and road surface.