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.



Shipping and the environment – research meets reality

Centre for Transport Studies (CTS) in co-operation with Ports of Stockholm invite you to the seminar Shipping and the environment – research meets reality.




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...


New climate-proof solutions for hard surfaces in cities

High-density road infrastructure that emphasise maximum durability and minimum maintenance create inflexible systems, which put increased stress on urban trees and lead to increased risk for flooding. Over the past five years, the ‘Climate-proof solutions for...


VTI is preparing for automated vehicles

Automation of traffic systems will lead to major changes. The European Union’s (EU) CoEXist research project began in June 2017 with the aim of preparing cities and road operators for the introduction of self-driving vehicles. The Swedish National Road and...


Vehicle Driver Monitoring: sleepiness and cognitive load

To prevent road crashes it is important to understand driver related contributing factors, which have been suggested to be the critical reason in 94 per cent of crashes. The overall aim of the project Vehicle Driver Monitoring has been to advance the...


Tomas Svensson new director-general

Tomas Svensson was today appointed Director-General of VTI. Tomas has been acting Director-General since January 2017.