Objectives & Outputs

In the proposed FunDBitS project, these new data sources will be evaluated for proposing a system for performance-based bitumen specifications. These will be based on:

  • proposed changes of EN 12591, EN 14023 and EN 13924 for bitumen characteristics applied for performance-based specifications;
  • changes of bitumen test procedures in order to be more precise on test conditions and to improve the test precision;
  • proposed improvements for EN 13108 including suitable bitumen performance characteristics for selected asphalt mixture types.

Deliverables

No

Deliverable Name / Report Name

D1

Report on identified correlations between bitumen and asphalt properties. Information for workshop participants for meeting preparation

D2

Report on correlation between five asphalt properties and bitumen tests / properties

D3

Proposal for specification requirements

 

milestones

M1

Project webpage, poster and flyer for general project information

M2

Acquisition template or format facilitating the collection of relevant data in WP3

M3

Database of relevant data relating to binder properties and/or test methods and their possible link with the field performance of asphalt pavements

Contribution of the project to the program objectives and expectations

The aim of current CEDR research programme is to help road administrations develop a suitable technical and commercial governance structure for the future management of ageing infrastructure and efficient and less energy demanding use of materials covering a better understanding of future liabilities, maintenance costs and the application of new technology driven condition assessment of road assets in a consistent manner.

This proposal is intended to improve the understanding of the true production and maintenance costs, both economic and environmental, of undertaking the impact of performance-based characteristics of binders in times where repeated problems with stable bitumen quality are faced and there tend to be more and more different types of modifiers and additives that can be used (functional-based binders).

The FunDBitS project aims at the development of specification recommendations on functional bitumen characteristics and, therefore, meets one of the expected outputs of the DoRN document on Energy Efficiency call. Because functional characteristics also allow the assessment of binders containing additives, the found relationships between bitumen and asphalt mixture properties will help to increase energy efficiency in road construction in future. With respect to expected outputs of functional durability-related specifications for bituminous binders used today in different modifications (pen grade distilled binders, PMBs, PPA modifications, surfactant doped binders or chemically viscosity improved binders) supports development of new materials and pavement asphalt mixes with stress on reduced energy and resource demand. Clearly defined functional specifications will made any decisions necessary by road administrations more reliable and effective in terms of expected service life and related costs. This might even economically fully vindicate use of high-quality materials.

Further evaluation of the actual effect of binder performance characteristics on energy efficiency will not be addressed directly within the project. The data collection will include job reports for which both bitumen and asphalt characteristics were evaluated in early pavement life. In this way, the project database will allow to evaluate the long-term pavement performance and correlate it with the binder properties in future. On the other hand it can be stated that another expected output fully covered by this project proposal are recommendations for specifications based on a functional approach. This approach is essential not only for better decision on materials used for rehabilitation or new structures, but supports the necessary shift from traditional deterministic approach used in design and modelling to a probabilistic predictable approach which is unavoidable if expecting extended life-time and better resistance to impacts affecting the pavement structure. Prediction of real time pavement behaviour might be less difficult and better understandable.

Last output related to energy efficiency task can be seen in development of conditions and recommendations which will push the road industry to continuously focus on improved quality of construction materials for longer durability.

The FunDBitS consortium is aware of further research proposals focussing on asphalt performance characteristics and their effects in LCA and energy efficiency models. The results of FunDBitS, in combination with other project work elaborated during CEDR 2013 call, will enable the assessment of binder quality for life-cycle properties.

The data sources will cover whole ofEuropeand most asphalt mixture types will be addressed in the evaluation. This will allow the development of climate-specific specification requirements which can be applied throughoutEurope.