Moderna betongbeläggningar: utveckling mot mindre slitage och partikelemission

Lars Kraft
Ulf Olofsson

Road paving of concrete has the potential to be an interesting alternative to asphalt in several ways. Concrete is normally durable and lacks fossil components, which is favorable from a climate point of view and for fire safety in e.g. tunnels. However, concrete is more expensive to lay, which means that from a sustainability perspective, the concrete must be both more durable and require less maintenance compared to asphalt coatings. The purpose of the present project has been to develop a concrete recipe (Concrete 2), with better properties regarding wear and particle emissions compared to a known standard concrete (Concrete 1) and a durable asphalt coating (SMA16) based on the same ballast material. Initial pin-on-disk machine tests showed that abrasion and particle concentration of concrete road materials exhibit a reversed proportionality to the hardness of the ballast, and a direct proportionality to the slip distance.

In VTI’s road simulator, Concrete 2 (the new recipe) was compared to Concrete 1 and against an asphalt of the type SMA16. The test showed that the wear was significantly lower for Concrete 2 compared to ABS16 and Concrete 1. Generally, both the concretes generate higher PM10 levels than the asphalt. Ultrafine particles are generated to a greater extent by the asphalt. The reason for the higher PM10 emission of the concrete is considered to be the contribution from the cement paste, which is reflected in an approximately three times higher calcium content in PM10 from the concrete compared to PM10 from the asphalt. Overall, both the test in road simulator and in the detailed studies in the pin-on-disc machine show that Concrete 2 has a higher wear resistance than both Concrete 1 and the asphalt SMA16 and generally generates less PM10 than Concrete 1.



Social sustainability and just mobility

Welcome to a research workshop on Social sustainability and just mobility, 8–9 October 2019 in Linköping, Sweden

European Road Profile User's Group, ERPUG

Welcome to the sixth ERPUG meeting in Vilnius, Lithuania. 

Vision Zero for Sustainable Road Safety in the Baltic Sea Region

The second Vision Zero for Sustainable Road Safety in the Baltic Sea Region conference will be held in Tallinn, Estonia. VTI is part of the programme committee. 



Knowledge in the fight against microplastics from road traffic

The Government has commissioned VTI to develop and disseminate knowledge regarding the emission of microplastics from road traffic.


How to make autonomous vehicles coexist with other traffic

The road infrastructure must be prepared for self-driving vehicles – especially in the beginning when the concepts are still new. Researchers are contributing to this through CoEXist, an EU-funded research project in which VTI participates as the largest...


Electric roads: ‘Standardisation is an important factor for a future European transport system’

VTI employees recently arranged a workshop in Brussels on the standardisation of Electric Road Systems (ERS). ERS has become increasingly relevant as a possible method for reducing the transport sector's environmental impacts, especially in terms of climate...


Research on passenger and freight transport research

Shift2Rail is a European railway project that works actively to create innovations within the railway sector. IMPACT-2 is a project within Shift2Rail that follows and evaluates the innovation projects. How are the innovations coming along? Are they beneficial...


How vehicles can avoid accidents on newly paved roads

Friction is an important property for road safety. VTI has investigated how roads change in the first few weeks after surfacing work has been completed. Researchers recommend posting warning signs when the road is opened and waiting at least three weeks to...


VTI contributes to study on older drivers and accidents

On behalf of and in collaboration with the Swedish Transport Agency, VTI has carried out a study of older drivers and the link between illness and traffic accidents. The Transport Agency has now published the results.