Abstract
In the past years, the use of liquid additives as bitumen modifiers has increased to tailor the rheology of bitumen for a wide range of applications. Their chemical composition and mutual interaction result in specific phase morphologies in the binders. Hence, there is a need to evaluate the phase morphology of complex binders and the impact of additives on their physical properties. The RILEM Technical Committee 272-PIM ‘Phase and Interphase behaviour of innovative bituminous Materials’, Task Group TG1 assessed the phase and interphase properties of bituminous binders. Some preliminary results are presented on blends using three liquid additives and a neat 35/50 bitumen. The goal of formulating the blends was to achieve similar consistency of a pen grade 70/100 bitumen at the original state and to evaluate the binders at both original and after aging. Physical properties were evaluated through rheological characterisation using a dynamic shear rheometer (DSR) in a wide range of conditions. The phase morphology was assessed using atomic force microscopy (AFM). Differential scanning calorimetry (DSC) was also used for the characterisation of the thermal behaviour of the binders. While conventional properties, as obtained from the routine binder testing methods, hardly distinguish between blends, the cross-over temperature, derived from DSR measurements, enabled to dictate the impact of liquid additives on the physical properties of bituminous binders at intermediate temperature. AFM confirmed a difference in phase morphology between the blends, whereas some binders displayed new phases at original and aged conditions. Glass transition, as determined by DSC, also showed a difference in the low-temperature domain that may be explained with the difference in phase morphology. Overall, an in-depth understanding of microstructure morphology and glass transition behaviour of complex binders can assist in designing future specifications to distinguish durable bituminous materials better.
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Acknowledgements
The authors acknowledge RILEM TC 272 PIM – TG1 ‘Phase and interphase behaviour of innovative bituminous materials’ for providing the materials and valuable discussions. This article was prepared by a task group within RILEM TC 272-PIM: Phase and Interphase behaviour of bituminous Materials. The article has been reviewed and approved by all members of the TG and the TC.
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TC Membership
Chair: Emmanuel Chailleux (Université Gustave Eiffel, France), emmanuel.chailleux@ifsttar.fr
Deputy Chair: Christiane Raab (EMPA), christiane.raab@empa.ch
TC Membership. Chair: Emmanuel Chailleux (Université Gustave Eiffel, France); Deputy Chair: Christiane Raab (EMPA, Switzerland); TC Members: Panos APOSTOLIDIS, TU Delft, The Netherlands; Francesco CANESTRARI, Università Politecnica delle Marche, Italy ; Augusto CANNONE-FALCHETTO, Aalto University, Finland; Xavier CARBONNEAU, COLAS, France; Alan CARTER, ETS Montréal, Canada ; Emmanuel CHAILLEUX, Université Gustave Eiffel, France ; Davide DALMAZZO, Politecnico di Torino, Italy; Hervé DI BENEDETTO, ENTPE, France; Michael ELWARDANY, Florida state university, United States; Andrea GRAZIANI, Università Politecnica delle Marche, Italy ; Hamzeh HAGHSHENAS, Federal Highway Administration, United States; Bernhard HOFKO, University of Technology Vienna, Austria; Mariusz JACZEWSKI, Gdansk University of Technology, Poland; Piotr JASKULA, Gdansk University of Technology, Poland; Salvatore MANGIAFICO, ENTPE, France; Alexandros MARGARITIS, Belgian Road Research Centre, Belgium; Virginie MOUILLET, CEREMA DTER MED, France; Sayeda NAHAR, TNO, The Netherlands; Jorge Carvalho PAIS, University of Minho, Portugal; Daniel PERRATON, ETS Montreal, Canada ; Christophe PETIT, Univerity of Limoges, France ; Kees PLUG, Ooms Civiel bv, The Netherlands; Laurent POROT, Kraton Polymers B.V., The Netherlands; Simon POUGET, Eiffage infrastructures, France ; Lily POULIKAKOS, EMPA, Switzerland; Marek PSZCZOLA, Gdansk University of Technology, Poland; Christiane RAAB, EMPA, Switzerland; Dawid RYS, Gdansk University of Technology, Poland; Cesare SANGIORGI, University of Bologna, Italy; Cédric SAUZEAT, ENTPE, France; Hilde SOENEN, Nynas, Belgium; Daniel STEINER, Austrian Quality Assurance Association for Aggregates, Austria; Lucia TSANTILIS, Politecnico di Torino, Italy; Stefan VANSTEENKISTE, Centre de Recherches Routières, Belgium ; Di WANG, Aalto University, Finland; Michael P. WISTUBA, Tehnical Univerity of Braunschweig, Germany; Martins ZAUMANIS, EMPA, Switzerland; Jiqing ZHU, Swedish National Road and Transport Research Institute (VTI), Sweden; Adam M. ZOFKA, IBDiM, Poland.
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Nahar, S., Porot, L. & Apostolidis, P. RILEM TC272 PIM: phase morphology of bituminous binders with liquid additives. Mater Struct 55, 239 (2022). https://doi.org/10.1617/s11527-022-02068-7
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DOI: https://doi.org/10.1617/s11527-022-02068-7