The Project
Toward a sustainable 100% recycling of reclaimed asphalt in road pavements



WP1 - Management, Dissemination, Clustering and Coordination:

Involves all activities to manage and coordinate the work of the project and deliver and disseminate its results in accordance with project schedule and budget.
The main objectives of WP1 are:
• To manage and coordinate the work of the project and deliver its results in accordance with project schedule and budget.
• To achieve and develop efficient synergies within the project and ensure that stakeholder needs are taken into account in the research.
• To disseminate and expose the project process and results to the scientific peer review and to prepare end-users for the implementation and exploitation potential of project results.

WP2 - Laboratory  Design:

Different reclaimed asphalts and virgin materials as binder and aggregates will be collected and characterized in the participating countries Germany and Italy.
The mixes selected for the investigation are two Stone Mastic Asphalt (SMA) mixes typically encountered in the surface courses of Germany and Italy. The percentage of RA within each mixture will vary from 0% (control mix) to the closest feasible to 100%. By comparison to the mechanical characterisation results between the control mix and the mixes with increasing content of RA, the most sensitive factors that affect the mixture performance –either good or poor—will be identified.

WP3 - Plant scale manufacturing and End-user manual:

On the basis of the results of WP2, each asphalt mixture will be produced at the asphalt plant (in Germany and Italy). Factors such as fractionation and stockpiling of the RA in the mixing plant and quality control during the production process will be considered.
The aim of this WP is to validate the laboratory design and to recognize and solve issues related to the plant manufacturing. WP3 will finally prepare the AllBack2Pave end-user manual on how to best produce cost-effective and quality asphalt mixes with high RA content.

WP4 - Performance prediction:

WP4 consists of two main parts. Initially, a comprehensive mechanical characterisation of the asphalt mixes will be performed in the labs of TU Dresden and UNIPA. The mixes will be characterised in terms of stiffness, fatigue cracking behaviour, rutting susceptibility, moisture damage resistance and permanent deformation behaviour.  The possibility of establishing binder’s parameters able to predict the rutting and fatigue cracking behaviour of the mixes by the sole testing of their binders will be also investigated.
With results of the mechanical characterization, a pavement design life calculation will be conducted based on the German analytical design procedure for asphalt pavements RDO-Asphalt (2009). The pavement life prediction will be conducted for two different kinds of pavements with asphalt wearing course, each incorporating different percentage of RA. Boundary conditions like frequency distribution of axle load classes and the distribution of asphalt surface temperatures will be varied

WP5 - Sustainability Assessment:

WP5 involves life cycle assessment and life cycle cost analysis in the context of a broader sustainability assessment of the investigated technologies. Additionally a state of the art review on sustainability rating systems will be provided together with the development of a sustainability assessment methodology.
The study will be based on chosen European case studies and will identify the most cost effective solutions, together with their environmental impact over the whole lifecycle of the selected road pavements.