Avnötningsbeständighet för högkvalitativa slitlagerbeläggningar: slitagemätningar i VTI:s provvägsmaskin (PVM) och jämförelser med laboratorietester enligt Prall

Nils-Gunnar Göransson

Samples from high-quality wearing course asphalt mixes were collected during production in the seasons 2009-2013. The samples included modified asphalts as well as reference mixes. Three different surface wear tests, with respect to abrasion from studded tyres, were carried out using VTIs circular road simulator (PVM). In order to verify the correlation between the three different test modes, tests according to EN 12697-16, Prall method, have been carried out.

Each of the tests included 14 mix types, including a reference mix, distributed over 28 test plates. The test plates were constructed in a laboratory environment. Extra plates were also constructed for laboratory testing. In total, 42 plates were required per test. Standard plates for PVM testing were used and had a thickness of about 40 millimetres.

Each test used tyres that had been “run-in” for about 500 kilometres. Sixteen tyres (including 4 reserve) were required for the test runs. Tyres were purchased at the same time from the same manufacturer and divided up randomly.

Testing was carried out until a constant linear rate of surface wear was achieved. The minimum and maximum number of machine revolutions were set at 200 000 and 300 000 respectively. Surface wear measurements were made by a laser profilometer and were taken at regular intervals on all 28 sample plates.



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.



Modal shift for an environmental lift?

Investigations in Sweden and other countries suggest a shift of goods transport from road to rail and waterborne transport to reach environmental and climate objectives. VTI is leading a new project to investigate how the modal shift can contribute and what...


Automation and digitalisation are making rail competitive

Road transport is developing rapidly and its productivity has increased sharply. Rail transport, however, has not developed at the same rate. Automation and digitalisation are essential if rail freight in Europe is to survive.


New research is creating a driverless logistics chain

The research project Born to Drive has come up with a system that allows new cars to move, without a driver, from the production line out to the parking area prior to being transported elsewhere. The vision is to automate the entire logistics chain from...


VTI testing automation in EU project

VTI is leading a series of tests in a major EU project on automated driving. The first driving tests were carried out n a test track in Slovenia in December. The project will focus in part on acceptance among different groups in society, in part on...


Freight transportation on road and rail analysed

Freight transport accounts for a large proportion of the emissions, noise and congestion produced by road traffic. Transporting freight in larger but fewer lorries could reduce the problem. At the same time it might entail freight being diverted from more...


Millions for research into maritime transport and the environment

Maritime transport is a major source of emissions of harmful air pollutants and carbon dioxide. In a new project, a research team from the Swedish National Road and Transport Research Institute (VTI) and the University of Gothenburg has received SEK 6.4...