Slaggasfalt, delrapport A: ballastegenskaper och slitageegenskaper enligt Prall

Leif Viman

There is great interest in the steel industry to increase the use of slag by constantly seeking new application opportunities. This project has focused on slag used as aggregate in asphalt pavement, where the most positive characteristics are the good adhesion and noise reduction properties, as well as good stability and durability. One aim of the project is to make the slag asphalt to a natural choice on roads in urban areas, where it is complicated because of congestion to do maintenance work and where high strength e.g. roundabouts, traffic lights, et cetera. Therefore, one wishes, and where noise and particle formation due to traffic is a problem. A second objective is to increase the material economy of society by using slag, produced in conjunction with steel instead of other materials whose properties often results in asphalt with poorer performance than Slag Asphalt. In this first interim report, results of about 10 different slag types are summarized, with respect to: 1. ballast properties, 2. wear properties according to Prall (EN 12697-16, Method A). By improving the process technology and manage the slag material with regards to crushing, magnetic separation and sorting etc. of the slag producer, the quality become better and smoother and materials become valued for road construction. Slag materials were sent to VTI from each supplier. VTI performed all testing. Aggregates Testing of the various slag materials have been performed according to European standards for different properties like abrasion resistance, fragmentation and shape: · EN 1097-1 resistance to wear (micro-Deval). · EN 1097-2 resistance to fragmentation (Los Angeles Value), · EN 1097-9 resistance to abrasion of studded tires (Nordic Ball mill), · EN 933-3 particle shape – Flakiness index. For Prall tests, asphalt specimens of type ABS11 (asphalt wearing course), where made. The fine fraction (0-4 mm) consisted of granite materials and all materials >4 mm consisted of the respective slag material. 9 out of 10 slag types investigated are REACH registered products.



Vision Zero for Sustainable Road Safety in the Baltic Sea Region

The conference Vision Zero for Sustainable Road Safety in the Baltic Sea Region is held i Vilnius, Lithuania. VTI is part of the organisation committé and also one of the speakers.

ICTTP 2020

ICTTP, International Conference on Traffic and Transport Psychology, is held in Gothenburg, Sweden.



International standardisation efforts have many advantages

VTI participates in several international standardisation committees. The work is important because it helps to ensure that standards can be adapted to Swedish conditions and it also provides access to valuable contacts and networks.


China wants to work with the best

Through the CTS cooperation, VTI is gaining valuable research contacts with China. The country is facing major challenges in the field of road safety but also has enormous potential.


VTI participated in conference on electric roads

Systems with electrified roads are a relatively new concept and many projects have been launched in recent years. To stimulate the transfer of knowledge and collaboration, the Research and Innovation Platform for Electric Roads arranged its second...


ADAS&ME is tackling the interaction between people and technology

ADAS&ME is a major EU project focused on automation, the human condition and the human environment. The budget is EUR 9.6 million and VTI is the coordinator.


Users contribute to the development of train simulators

Apart from advanced driving simulators, VTI has developed several variations of train simulators which are used for training, education and research. In recent years, interest has increased drastically among major actors in the railway sector, and VTI has...


VR study to contribute to a better working environment for bus drivers

A study where bus drivers test autonomous driving in a VR environment may contribute to a better working environment with reduced stress on the driver and safer driving.