Reclaimed asphalt is re-used in the production cycle of asphalt, mainly in mixtures for base layers. With an average rate of 66% reuse, there is still a last step required to optimize reuse and/or new applications, for example use in surface layers.
Rejuvebit will investigate the technical, economic and ecological impact of rejuvenation, so its use will increase a proper recycling rate of asphalt granulate. The review and market survey of the rejuvenation supply resources, lead to a ranking of potential rejuvenators for the Flemish asphalt sector. On the basis of 5 demonstrative test subjects in Flanders the technical impact of the use of rejuvenators will be evaluated on the level of mixture design, mechanical properties and traceability. These demonstrations are intensively documented on the basis of a written final report, a public accessible web site and dissemination in the media. An experimental lab research leads to recommendations for the allowed deviations for production described in e.g. a tender. The project involves the quantification of the environmental impact and economic feasibility for Flanders, with scenarios for 5 typical asphalt plants in order to increase the recycling rates for all types of asphalt plants and by type of mixture.
The project relates the technical quality and durability (life) and of the social sustainability (financial feasibility, ecological profile and social effects). As economic impact, a higher production of asphalt is aimed at; and more in-depth innovation studies for "greener asphalt", given the increase of the recycling (both higher percentages as new applications) will not lead to lower sales but to a higher production for the same budget of the client. In this project the direct economic impact (on the target group) is calculated for the 5 test cases (cost balance with higher recycling and extending the life cycle).
The social benefit is to be found in the conservation of the road infrastructure (shown in this project by means of laboratory test results and subsequently by means the monitoring of the test tracks) and a reduced ecological footprint at a higher production volume, demonstrated in this project by means of comparative LCA studies of the 5 test cases with the main parameters: Global Warming Potential, Depletion of resources and waste management, air pollution, toxicity, recyclability, performance and service life. The quantification is too complex for each individual actor, hence the inclusion in this project. This quantification may subsequently be used by policy-makers for further environmental measures or as an example in other industries.