APSE last results were presented at the final project workshop on Circular Economy in the construction sector

The APSE Conference “Promoting Circular Economy for a Greener Road Construction”,   organised by Comunidad of Madrid in cooperation with ACCIONA held on November 22 in Madrid, presented practical examples that contributes to a circular economy model in the road construction sector.

Beside the  main outcomes of the APSE project, the workshop addressed issues such as Spain’s circular economy strategy, incorporating this model into public initiatives at different levels and applying it to the construction sector, especially regarding regulations and successful stories.

Representatives of public administrations, private companies, academia and associations were joined together to share their experience with the audience.


  • Event agenda

APSE_Workshop Programme

  • Presentations

1 Experience in EU projects Comunidad de Madrid

2 Examples of sustainable urban pavement in Madrid city

3 Circular Economy applied to the construction of roads_CEDEX

4 Normative Framework Sustainability_FCC

5_Industrial Symbiois and Circular Economy_CWare

6 Latest Technological Trends and Environmental demands on the asphalt sector_Asefma

7 – 10 Reason to use secondary raw materials in asphalt_Thinking Remarket

8 Eco-innovative bitumen binders_CEPSA

9 Accelerated testing of eco-innovative pavements_TRL

10 Implementation of the eco-friendly innovative materials in a real road_WUT

11 Circular Economy Strategies applied to road construction_ACCIONA

Towards Understanding the Polymerization Process in Bitumen Bio-Fluxes

1Faculty of Civil Engineering, Warsaw University of Technology, 00-637 Warsaw, Poland
2General Directorate for National Roads and Motorways, 66-004 Zielona Góra, Poland
*Author to whom correspondence should be addressed.
Received: 9 August 2017 / Revised: 30 August 2017 / Accepted: 5 September 2017 / Published: 9 September 2017
(This article belongs to the Section Biomaterials)
View Full-Text   |   Download PDF [4679 KB, uploaded 9 September 2017]   |


Bitumen is a commonly used material for road construction. According to environmental regulations, vegetable-based materials are applied for binder modification. Fluxed road bitumen containing a bio-flux oxidation product increases the consistency over time. The efficiency of crosslinking depends on the number of double bonds and their position in the aliphatic chain of fatty acid. The main goal of this paper was to examine the structural changes taking place during hardening bitumen with bio-flux additives. Two types of road bitumens fluxed with two different oxidized methyl esters of rapeseed oil were used in this study. Various chemical and rheological tests were applied for the fluxed-bitumen at different stages of oxygen exposure. The oxidation of rapeseed oil methyl ester reduced the iodine amount by about 10%–30%. Hardening of the fluxed bitumen generally results in an increase of the resins content and a reduction of the aromatics and asphaltenes. In the temperature range of 0 °C to 40 °C, bio-flux results with a much higher increase in the phase angle than in temperatures above 40 °C in the bitumen binder. The increase in the proportion of the viscous component in the low and medium binder temperature is favorable due to the potential improvement of the fatigue resistance of the asphalt mixture with such binders. View Full-Text

▼ Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).