DURABILITY ANALYSIS OF DIFFERENT WARM MIX ASPHALT CONTAINING RECLAIMED ASPHALT PAVEMENT M. Perez-Martinez *, P. Marsac *, T. Gabet *, F. Hammoum *, M. Lopes **, S. Pouget *** * LUNAM Université, IFSTTAR, MAST, MIT, F Bouguenais, France ** Polytechnic School University of São Paulo, São Paulo, Brazil *** EIFFAGE Travaux Publics, Direction Recherche & Innovation, F Corbas, France INTRODUCTION & OBJECTIVES MATERIALS & METHODS RESULTS & DISCUSSION CONCLUSIONSCONCLUSIONS The research presented in this poster was carried out as part of the Marie Curie Initial Training Network (ITN) action, FP7-PEOPLE-2013-ITN. This project has received funding from the European Union’s Seventh Framework Programme for research, technological development and demonstration under grant agreement number [1] B. Hill, “Performance evaluation of warm mix asphalt mixtures incorporating reclaimed asphalt pavement,” University of Illinois at Urbana-Champaign, 2011 [2] M. Zaumanis, “Warm Mix Asphalt Investigation,” Riga Technical University, 2010 [3] C. De La Roche et al., “Hot Recycling of Bituminous Mixtures,” in Advances in Interlaboratory Testing and Evaluation of Bituminous Materials - State-of-the-Art, Springer, 2013, pp. 361–429. [4] LCPC, “Fatigue carousel at IFSTTAR, Nantes,” Nantes, France, [5] M. Lopes, T. Gabet, L. Bernucci, and V. Mouillet, “Durability of hot and warm asphalt mixtures containing high rates of reclaimed asphalt at laboratory scale,” Mater. Struct., 2014 REFERENCESREFERENCES DURABILITY Warm Mix Asphalts Reduction of emissions Energy consumption Improved workability Reclaimed Asphalt Pavement Reduction of aggregates extraction and asphalt disposal Reuse of materials CONTEXT AIM OF THE STUDY  Comparison of the mechanical performance and bitumen evolution of a reference HMA and two WMA mixtures, surfactant and foamed technologies  Addition of 50% of RAP  Characterization of ageing [1]-[2]  Short term – 4 hours 135°C  Long term – 9 days 85°C Twelve AC10 mixtures with 5.39% of 35/50 bitumen content were manufactured. Considering that the work is focused on the study and comparison of mixtures durability, the ageing procedure was performed on six of the mixtures. The objective was to represent in laboratory the process that takes place during construction and service life. The ageing protocol used is based on the ageing procedure proposed by the RILEM Technical Committee ATB TG5 [3]. The short term ageing involved heating the loose mix during 4h at 135°C before compaction. Thus, the long term ageing, on compacted mix lasted 9 days at 85°C. Studied mixtures and temperature of manufacture [4]-[5] TESTING Bitumen Tests Penetration and softening point results by the index carbonyl of every sample is represented, also a tendency curve has been added in each case. An imaginary limit seemed to appear around the lowest and highest values, as if a top hardening could be reached with ageing. Foaming affects oxidation process differently? Mixtures Tests Fatigue 0 % RAP50 % RAPBy % RAP The results obtained on the fatigue test compared to complex modulus results confirm the tendencies observed. When the level of modulus increases the material turns to a more brittle response, which is what occurs with the slopes of the fatigue laws. With these levels of dispersion, it is not clear whether they should be attributed to flaws in the test or if it reflects the intrinsic properties of the WMA and FWMA. ACKNOWLEDGEMENTSACKNOWLEDGEMENTS  An asymptote is reached by most of the mixtures for the penetration and softening point tests.  With regards to fatigue performance, independently of the manufacture technique employed the addition of 50% of RAP seems to rise systematically both the values of ε 6 and complex modulus.  In terms of mechanical performance improvement, the ageing protocol applied seems to increase the response of the mixtures, ε 6 and complex modulus, regardless of the technique used for the manufacture of the mixes.