Eurasphalt & Eurobitume congress in Prague – 1ST TO 3RD JUNE 2016
The 6th Eurasphalt & Eurobitume Congress 2016 took place in Prague from the 1st to the 3rd of June 2016. It is a unique event organized every four years since 1996 by the European Bitumen and Asphalt industry in a European city.
This congress is an important event in our calendar as it is the meeting point for all experts thought the world. It is used as an important vehicle to raise the awareness across a wide audience about key drivers in our market environment, share best practices, learn about new technologies and respond with solutions to future challenges.
A record number of 247 submitted abstracts for papers was received for this congress, of which 9 were submitted by Total, written by the Research engineers in CReS and Products engineers in Nanterre. 4 of them were also presented as posters.
PAPERS & POSTERS FROM TOTAL
Here is the list of theses papers with a short resume:
Environmental and mechanical evaluation of warm mix asphalts in laboratory and on site
Study in partnership with IFSTTAR and EIFFAGE TP. In order to develop knowledge on the different technologies, an experimental trial has been organized in September 2013 in partnership between TOTAL Marketing Services, Eiffage TP and Ifsttar. 4 sections have been realized (hot mix asphalt, warm mix asphalt with respectively ready to use binder, foam, and combination of foam and ready to use binder). The different warm mix technologies have been assessed regarding their environmental impact in comparison with traditional hot mixes. On average the different warm mix technologies lead to savings on energy consumption and on greenhouse effect gases. Performances of warm mixes are equivalent to the ones obtained with hot mix. A follow-up of the test is planned.
Tribological and wettability study of non foaming warm mix asphalt additives at mixing and compaction temperatures
In order to better understand the effect of WMA additives during the mixing, lay down and compaction steps, both tribological and wetting experiments were conducted at high temperatures. On the one hand, friction experiments were conducted on a linear reciprocating tribometer in order to investigate the effect of additives on friction process between aggregates. Both hydrodynamic and boundary lubrication conditions were investigated. On the other hand, the effects of WMA additives on the surface tension of neat bitumen were determined and the spreading of a drop of bitumen on the mineral aggregate was also investigated. Promising results indicate that organic and chemical additives don’t get the same friction behaviour in boundary lubrication regime. Their contribution to surface tension is although discussed.
European round robin tests for the Multiple Stress Creep Recovery Test and contribution to the development of the European standard test method
Study in partnership with BRRC (Belgian Road Research Centre), REPSOL, CEPSA, Department of Efficient Refining Technologies (UniCRE-EFFRET), Research Institute of Inorganic Chemistry, Litvínov-Záluží, COLAS SA, and Nynas UK TG1 of CEN TC336/WG1 was assigned the task to produce a European standard test method for the Multiple Stress Creep Recovery (MSCR) Test. In 2012, upon completion of the first draft version of the document prEN 16659, TG1 decided to organize a European round robin test, with 4 different binders. Based on the outcome of the statistical analysis and the feedback from the 25 participants, the draft version was revised and a second round robin test was conducted in 2014. This paper reports on the outcome of the round robin exercises and the findings, conclusions and recommendations of TG1 towards the implementation in the framework of European binder specifications.
Evaluation of rheological parameters regarding the resistance to permanent deformation
A research program was developed in which four different types of binder, i. e. a polymer modified bitumen, a paving grade bitumen, a bitumen of modified viscosity and an oxidized bitumen, were processed in an asphalt concrete and afterwards subject to the Cyclic compression test according to EN 12697-25. Before the used binders were designed in such a way, that on the one hand they had the same complex shear modulus and on the other hand the same phase angle at the testing temperature of 50 °C during the Cyclic compression test. The properties of the polymer modified bitumen were used as reference. In this paper the characteristics of the binders and the results of the asphalt tests are presented and at the same time being discussed.
Quantification of polymer content in binder by modified MSCR test
Study in partnership with TU Braunschweig Rheological analyses are performed using the Multiple Stress Creep and Recovery Test (MSCRT) to model creep recovery curves using to the Burgers model. The results of MSCRT prove that the viscous behavior of the binder is sufficiently described under the defined test conditions. However, the viscoelastic behavior may be determined more precisely at equi-viscose temperature. Further on the modification of the test enables to assess the effectiveness of the polymers contained in the bitumen on the one hand or the polymer content on the other.
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New modified binder packed in block for road application
A new bituminous solution in block form has recently been developed for areas where truck delivery in bulk at high temperature is not possible. This patented technology allows the bitumen to sustain load and resist creep up to 75-80 °C. The bitumen is conditioned in blocks of 20-25kg keeps its original shape during transport by containers and storage at ambient temperature during several months. This study focuses also on various technical studies that have been carried out on the bitumen in block. All results and measurements are in compliance with EN specifications and show that this solution performs equally when compared to reference paving grade bitumen in terms of workability, moisture resistance, rutting resistance, fatigue resistance and thermal cracking resistance.
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A new bituminous binder replacing oxidized bitumen in roofing applications
In the objective to reduce the application temperature of roofing applications, an alternative to oxidized bitumen for bonding applications was developed. This new product shows similar to superior performances compared to oxidized bitumen, with a Ring-Ball temperature close to 100°C, but a low viscosity allowing an reduction of the application temperature by 40 to 90°C. Besides, pealing experiments showed a bonding property more successful than that observed with oxidized bitumen. Finally, an excellent creep resistance is demonstrated by rheological measurements until a temperature of 75°C under load. Consequently, this product is more stable during its transport and its storage.
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Low temperature and aging properties of polymer-modified binders
Study in partnership with Eurovia This study presents the results of a study devoted to the validation of different methods measuring the low temperature behaviour of bituminous binders. This validation was performed in reference to the restrained specimen thermal shrinkage test (TSRST) performed on an standard asphalt mix-design. In addition to both Fraass and BBR testing, a newer method (ABCD test) for the assessment of cracking behavior has been evaluated as well. The investigation focused on pure bitumen and binders modified at several levels of content with an elastomeric polymer (crosslinked or not). Finally, an important part of the investigation was devoted to a concomitant analysis of the sensitivity of these test methods to the degree of aging of both binders and asphalt mixes.
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An evaluation of aging of polymer-modified asphalts
Study in partnership with Eurovia The present study is focused on the low-temperature and the aging properties of various bituminous binders in relation to the corresponding properties of asphalt mixes. In a first publication, investigations were devoted to different binder’s characterization method (Fraass, BBR, ABCD) as potential predictive tool to thermal cracking of asphalt mixtures (TSRST). This paper focuses on analyzing the sensitivity of these test methods to the degree of aging of different binders (paving bitumen, crosslinked elastomer-modified binder and physical blend elastomer-modified binder) and asphalt mixes. Based on original investigations, noticeable trends are pointed out aging impact on binders and both methods.
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Upload the poster on An evaluation of aging of polymer-modified asphalts
One of these papers was selected for oral presentation by Yvong Hung, Research engineer in the Research Center of Solaize (France), during the 6A session regarding "Binder performance and testing", on the Thursday 2nd of June.
Moreover, this session was addressed by the keynote speaker Gilles Gauthier, Technical Bitumen Manager for Total Marketing Services:
Total was present with an exhibition area: it was the opportunity to focus on the recent development of the Styrelf range, but also on other products and services. Please have a look at our page on Styrelf to check the recent innovations ! aConnect here mettre le lien vers la page http://www.bitumen.total.com/solutions-mix-asphalt/styrelf-home/styrelf....
The platform of Bitume Online was presented to customers with ipads available for direct demonstration.
Eurobitume will organize the next E&E meeting on the 13-15th May 2020 in Madrid (Spain), but in the meanwhile , an "Asphalt day" will be organized on the 14-15th June 2018 in Berlin (Germany).
We are looking forward to meeting you there!