Recommendation of RILEM TC 264 RAP on the evaluation of asphalt recycling agents for hot mix asphalt

Matériaux et constructions - Tập 55 - Trang 1-9 - 2022
Martin Hugener1, Di Wang2, Augusto Cannone Falchetto2, Laurent Porot3, Patricia Kara De Maeijer4, Marko Orešković5, Margarida Sa-da-Costa6, Hassan Tabatabaee7, Edoardo Bocci8, Atsushi Kawakami9, Bernhard Hofko10, Andrea Grilli11, Emiliano Pasquini12, Marco Pasetto12, Huachun Zhai13, Hilde Soenen14, Wim Van den bergh4, Fabrizio Cardone15, Alan Carter16, Kamilla Vasconcelos17, Xavier Carbonneau18, Aurelie Lorserie18, Goran Mladenović5, Tomas Koudelka19, Pavel Coufalik19, Runhua Zhang20, Eshan Dave20, Gabriele Tebaldi21
1Empa - Materials Science and Technology, Dübendorf, Switzerland
2Department of Civil Engineering, Aalto University, Espoo, Finland
3Kraton Chemical B.V, Almere, Netherlands
4EMIB, Faculty of Applied Engineering, University of Antwerp, Antwerp, Belgium
5Faculty of Civil Engineering, University of Belgrade, Belgrade, Serbia
6National Laboratory for Civil Engineering, Lisboa, Portugal
7Wayzata, Minneapolis, USA
8eCampus University, Novedrate, Italy
9Pavement Research Team, Public Works Research Institute, Tsukuba-shi, Japan
10Institute of Transportation, TU Wien, Vienna, Austria
11Department of Economics, Science and Law, University of the Republic of San Marino, San Marino City, San Marino
12Department of Civil, Environmental and Architectural Engineering (ICEA), University of Padua, Padua, Italy
13Idaho Asphalt Supply Inc, Nampa, USA
14NYNAS NV, Bitumen Research, Antwerp, Belgium
15Department of Civil and Building Engineering and Architecture, Università Politecnica delle Marche, Ancona, Italy
16Department of Construction Engineering, École de Technologie Supérieure (LCMB-ETS), Montreal, Canada
17Laboratory of Pavement Technology, University of São Paulo, Cidade Universitária, São Paulo, Brazil
18Campus Scientifique Et Technique (CST) COLAS, Magny-les-Hameaux, France
19Faculty of Civil Engineering, Institute of Road Structures, Brno University of Technology, Brno, Czech Republic
20Department of Civil and Environmental Engineering, University of New Hampshire, Durham, USA
21Department of Civil and Environmental Engineering and Architecture, University of Parma, Parma, Italy

Tóm tắt

This recommendation is based on the results of an inter-laboratory study organised by the RILEM technical committee TC 264-RAP "Asphalt Pavement Recycling"—Task Group 3 (TG3) focusing on Asphalt Binder for Recycled Asphalt Mixture. The TG3 aimed to evaluate the effect of a specific family of materials known as asphalt recycling agent (ARA) on the aged binder under different configurations. Even though ageing is an irreversible phenomenon, effective ARA must have the capability to improve the flexibility of the bituminous materials and their resistance against cracking susceptibility with no adverse effect on the rutting resistance of pavements containing reclaimed asphalt. A total of 17 participating laboratories analysed the properties of binder blends composed of aged binder from reclaimed asphalt in three different contents (60, 80, 100%), ARA and virgin binder. The physical properties of the blends were thoroughly evaluated through traditional and rheological binder testing. This recommendation proposes to restore the original material properties at low and intermediate temperatures (i.e. cracking resistance) while balancing the high-temperature characteristics (i.e. rutting susceptibility) with durable impact throughout the progression of ageing phenomena. Therefore, useing of the Dynamic Shear Rheometer is foreseen as a more suitable and sustainable means to evaluate binder blends containing an asphalt recycling agent. Compared with conventional testing, the proposed approach requires fewer materials while resulting in a faster experimental procedure with one single test.

Tài liệu tham khảo

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