Slaggasfalt, delrapport B: stabilitet och skjuvegenskaper hos slaggasfalt


Slag as aggregate in asphalt mixes has previously been studied both in the laboratory and through different road tests. Primarily, these studies have meant wearing courses because it has been found that many slags is highly abrasion resistant and has also shown positive characteristics as aggregate in noise-reduction pavements. In this project is the study focused on stability characteristics of binder and base mixes. Drilled cores from three road objects have been studied, where the slag asphalt is exposed to very heavy traffic at the entrance of two different steel industries and one object where the slag asphalt is located in a roundabout. These pavements are 10-15 years old. In addition to these test binder course of the type AC16 with 70/100 bitumen has been produced in the laboratory with slag from 10 different steel producers and one reference with conventional aggregate. The analysis carried out is dynamic creep according to FAS Method 468 and shear strength according to method developed at VTI. The shear strength was investigated at different temperatures and frequencies (load speeds), which make it possible to present the results in so-called master curves. The advantage of this type of complex research is to assess the function of the pavement at different seasons and different traffic speed. The results from both cores and laboratory samples has shown that asphalt mixes with slag as aggregate provides stable pavements that are suitable on particularly sensitive surfaces such as roundabouts, traffic lights and bus stops, which have large shear stresses.



International Conference on Electric Road Systems starts today

Electric Road Systems (ERS) is a relatively new concept with many initiatives on the way. To learn from each other and stimulate new collaborations the Swedish Research and Innovation Platform for Electric Roads arranged the first international conference...


Same survey of road users’ attitudes in 50 countries

At the Road Safety on Five Continents Conference, RS5C, one entire session presented a large survey of road users' attitudes in 38 countries. Results show large differences between countries in many areas, both regarding behavior and attitudes. A new survey...


Good results with alcohol interlock program according to Swedish study

An alcohol interlock program makes it possible for drink driving offenders to continue their everyday lives. In a Swedish study most of the participants were satisfied with the program and experienced improved health. They also reported drinking alcohol more...


Traffic safety in the spotlight

Today the Conference Road Safety on Five Continents (RS5C) opened in Jeju Island, South Korea. More than 220 participators have come from all over the world to present findings and learn about traffic safety. Dr. Young Tae Kim, Secretary-General of the...


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...