Recycled hot asphalt mixtures with milled asphalt from geosynthetic-reinforced asphalt layers
DOI:
https://doi.org/10.58922/transportes.v33.e3061Keywords:
milling, RAP, reinforced asphalt, rehabilitation, geosyntheticAbstract
The increasing use of geosynthetic interlayers, such as geogrids, geocomposites, and paving mats in asphalt rehabilitation projects, has led to an increase in milling operations involving asphalt layers containing these materials. While milling conventional pavement layers is well-documented, experience with milling layers reinforced with geosynthetic polymeric or fiberglass interlayers remains limited. This study aimed to evaluate the mechanical performance of asphalt mixtures containing Reclaimed Asphalt Pavement (RAP) with geosynthetic fragments (G-RAP). An experimental section was constructed at Salvador International Airport (Brazil), featuring five test sections reinforced with geosynthetics, which were milled after construction. Field results indicated that all interlayers were millable, though with variable milling efficiencies and byproducts with different physical characteristics. A mean reduction of 18% in milling efficiency was observed in the reinforced layers compared to the unreinforced control section. The results indicate that there are no significant differences between the G-RAP millings and the control RAP, other than the presence of geosynthetic fragments, highlighting the feasibility of reusing G-RAP in applications similar to conventional RAP. The analysis of asphalt mixtures with 20% G-RAP demonstrated that the presence of geosynthetic fragments maintained the particle size distribution of the control RAP and did not compromise the resilience modulus. Furthermore, G-RAP proved beneficial for mechanical properties such as Marshall stability, flow, and indirect tensile strength, confirming its viability for use in recycled paving mixtures.
Downloads
References
ASTM (2020) D 6637: Standard Test Method for Determining Tensile Properties of Geogrids by the Single or Multi-Rib Tensile Method. ASTM International, West Conshohocken, PA.
ASTM (2018) D5261: Standard Test Method for Measuring Mass per Unit Area of Geotextiles. ASTM International, West Conshohocken, PA.
ASTM (2022) D6140: Standard Test Method to Determine Asphalt Retention of Paving Fabrics Used in Asphalt Paving for Full-Width Applications. ASTM International, West Conshohocken, PA.
ASTM (2015) D6927: Standard Test Method for Marshall Stability and Flow of Asphalt Mixtures. ASTM International, West Conshohocken, PA.
ASTM (2017) D6931-17: Standard Test Method for Indirect Tensile (IDT) Strength of Asphalt Mixtures. ASTM International, West Conshohocken, PA.
DNIT 033/2021 - ES (2021) Pavimentos flexíveis - Concreto asfáltico reciclado em usina a quente - Especificação de serviço. Rio de Janeiro.
DNIT 135/2018 - ME (2018) Pavimentação asfáltica - Misturas asfálticas - Determinação do módulo de resiliência - Método de ensaio. Rio de Janeiro.
DNIT 136/2018 (2018) Pavimentação asfáltica - Misturas asfálticas - Determinação da resistência à tração por compressão diametral - Método de ensaio. Rio de Janeiro.
DNIT 178/2018 - PRO (2018) Pavimentação asfáltica - Preparação de corpos de prova para ensaios mecânicos usando o compactador giratório Superpave ou o Marshall - Procedimento. Rio de Janeiro.
DNIT 412/2019 - ME (2019) Pavimentação - Misturas asfálticas - Análise granulométrica de agregados graúdos e miúdos e misturas de agregados por peneiramento - Método de ensaio. Brasília-DF.
DNIT 447/2024 - ME (2024) Misturas asfálticas – Ensaio de estabilidade e fluência Marshall – Método de ensaio. Brasília-DF.
Canestrari, F., Cardone, F., Gaudenzi, E., Chiola, D., Gasbarro, N. & Ferrotti, G. (2022) Interlayer bonding characterization of interfaces reinforced with geocomposites in field applications. Geotextiles and Geomembranes, 50, pp. 154-162. DOI: https://doi.org/10.1016/j.geotexmem.2021.09.010
Correia, N.S. & Zornberg, J.G. (2018) Strain distribution along geogrid-reinforced asphalt overlays under traffic loading. Geotextiles and Geomembranes, 46(1), pp. 111-120. DOI: https://doi.org/10.1016/j.geotexmem.2017.10.002
Damisch, A. & Kirschner, R. (1994) Recycling of Grid Reinforced Asphalt Pavements. In Proceedings of the Fifth International Conference on Geotextiles, Geomembranes and Related Products, pp. 105-108.
Gu, F., Andrews, D. & Marienfeld, M. (2021) Evaluation of Bond Strength, Permeability & Recyclability of Geosynthetic Products. In Proceedings of the Geosynthetics Conference, Online, p. 362.
Kumar, V.V., Roodi, G.H., Subramanian, S. & Zornberg, J.G. (2023) Installation of geosynthetic interlayers during overlay construction: Case study of Texas State Highway 21. Transportation Geotechnics, 43, 101127. DOI: https://doi.org/10.1016/j.trgeo.2023.101127
Nguyen, M.L., Hornych, P., Le, X.Q., Dauvergne, M., Lumière, L., Chazallon, C., Sahli, M., Mouhoubi, S., Doligez, D. & Godard, E. (2021) Development of a rational design procedure based on fatigue characterisation and environmental evaluations of asphalt pavement reinforced with glass fibre grid. Road Materials and Pavement Design, 22(sup1), S672-S689. DOI: https://doi.org/10.1080/14680629.2021.1906304
Saxena, A., Kumar, V.V., Correia, N.S. & Zornberg, J.G. (2023) Evaluation of Millability and Recyclability of Asphalt with Paving Interlayers. Geotechnical Testing Journal, 47(1), GTJ20230326. DOI: https://doi.org/10.1520/GTJ20230326
Souza, T.R. (2024) Aspectos da fresagem em pavimentos reforçados com geossintéticos e impacto do fresado (RAP) nas propriedades de misturas asfálticas recicladas. Dissertação (Mestrado em Engenharia Civil) – Universidade Federal de São Carlos, São Carlos.
Tran, N., Julian, G., Taylor, A., Willis, R. & Hunt, D. (2012) Effect of geosynthetic material in reclaimed asphalt pavement on performance properties of asphalt mixtures. Transportation Research Record, 2294(1), pp. 26–33. DOI: https://doi.org/10.3141/2294-03
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2025 Natália de Souza Correia, Tiago Rodrigues Souza
This work is licensed under a Creative Commons Attribution 4.0 International License.
Authors who submit papers for publication by TRANSPORTES agree to the following terms:
- The authors retain the copyright and grant Transportes the right of first publication of the manuscript, without any financial charge, and waive any other remuneration for its publication by ANPET.
- Upon publication by Transportes, the manuscript is automatically licensed under the Creative Commons License CC BY 4.0 license. This license permits the work to be shared with proper attribution to the authors and its original publication in this journal.
- Authors are authorized to enter into additional separate contracts for the non-exclusive distribution of the version of the manuscript published in this journal (e.g., publishing in an institutional repository or as a book chapter), with recognition of the initial publication in this journal, provided that such a contract does not imply an endorsement of the content of the manuscript or the new medium by ANPET.
- Authors are permitted and encouraged to publish and distribute their work online (e.g., in institutional repositories or on their personal websites) after the editorial process is complete. As Transportes provides open access to all published issues, authors are encouraged to use links to the DOI of their article in these cases.
- Authors guarantee that they have obtained the necessary authorization from their employers for the transfer of rights under this agreement, if these employers hold any copyright over the manuscript. Additionally, authors assume all responsibility for any copyright infringements by these employers, releasing ANPET and Transportes from any responsibility in this regard.
- Authors assume full responsibility for the content of the manuscript, including the necessary and appropriate authorizations for the disclosure of collected data and obtained results, releasing ANPET and Transportes from any responsibility in this regard.
