Hot recycling of asphalt at a central plant: a general quality control process and long term follow up results: Swedish case studies

Download

This notat aims to highlight the various demands on hot recycling of asphalt at a plant and to study how the recycled asphalt mixtures differ from the new one and how much asphalt granules that can be mixed without affecting the pavement performance negatively. The report presents a translation from Swedish to English of already published reports on hot recycling of asphalt in Sweden. Hot recycling at a central plant is a technique that has increased in popularity over the past years and today there are large numbers of asphalt recycling plants adapted for hot recycling in Sweden. In case of hot recycling plants, 10–50 percent of asphalt can be recycled depending on the plant type, method of recycling, type of the manufactured mixture, traffic volume and quality of the old asphalt pavement, etc. Recently, new recycling methods have been developed to enable 90–100 percent reclaimed asphalt (RA) involvement by continuous hot mix recycling. Correspondingly, the report presents results of tests carried out on the binder layer (ABb) of road 40 and surface course (ABS) of road 42, Västergötland. Research has been carried out on mixes and test sections to cover quality control of RA, stone materials in asphalt, binder content, particle size distribution and voids in asphalt, analysis of recycled binders and mechanical properties of asphalt.

MEET US


25-26
Apr

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.

LATEST NEWS


2018-02-13

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.


2018-02-08

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...


2018-02-05

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...


2018-02-02

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...


2017-11-30

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...


2017-11-30

New research programme for more efficient travel

The Swedish National Road and Transport Research Institute (VTI) is playing an important role in a major new research programme to find radical solutions leading to fewer trips and more efficient travel, along with tools to enable better use of roads and...