• Laboratory investigation and modelling of alternative materials for sub-ballast and formation rehabilitation in a heavy haul railway line 

  Castro, G.; Quispe, J.; Motta, R.; Moura, E.; Costa, R.; Bernucci, L.; Paixão, A.; Fortunato, E. (Elsevier, 2026-01)

  The sub-ballast layer plays a key role in railway track performance, especially under heavy haul conditions such those of the Carajás Railway (EFC) – Brazil, where axle loads are expected to increase to 40 t/axle – a level ...
• Ballasted Railway Track–Bridge Transition Zone Monitoring Methods: Recent Developments, Challenges, and Prospects 

  Siahkouhi, M.; Rashidi, M.; Miri, A.; Ghiasi, A.; Paixão, A. (ASCE - American Society of Civil Engineers, 2025-05)

  Many researchers have studied the dynamic response of ballasted railway track–bridge transition zones (RTBTZs) using different instrumentation systems. The primary factor contributing to the frequent abnormal dynamic ...
• Dynamic response of ballasted High-Speed Railways: insights from experimental measurements and 3D nonlinear numerical modelling 

  Varandas, J.; Paixão, A.; Tijera, Á.; Crespo-Chacón, I.; Estaire, J.; Fortunato, E. (Elsevier, 2025-03)

  High-Speed Railways provide efficient transportation but impose significant dynamic forces on ballasted tracks, accelerating ballast degradation and increasing maintenance demands. This study aims to understand and mitigate ...
• Estudos experimentais sobre a avaliação do potencial da escória de aço como material alternativo para balastro ferroviário 

  Paixão, A.; Fortunato, E.; Delgado, B.; Fonseca, A. (CRP - Centro Rodoviário Português, 2025-05-13)

  Alguns subprodutos industriais, como a escória de forno de arco elétrico (EAF), têm ganhado relevância como alternativa sustentável aos agregados britados naturais, na utilização em balastro ferroviário. Este trabalho ...
• Efficient pavement crack monitoring for road life cycle management 

  Pena, R.; Marques, N.; Batista, F. A.; Manso, J.; Marcelino, J. (Transport Research Arena TRA2024, 2024-04)

  Road pavements are vital for transportation infrastructure, yet they deteriorate over time due to traffic loads and environmental factors, resulting in cracks and damage. This paper introduces an innovative method for crack ...
• Avaliação e caracterização do desempenho da infraestrutura ferroviária recorrendo a dispositivos móveis, inteligentes e de baixo custo 

  Paixão, A.; Fortunato, E. (Engenho e Média, Lda, 2024-07)

  Os dispositivos móveis inteligentes, como smartphones e tablets, tem revolucionado as nossas vidas e apresentam um elevado potencial de aplicação na monitorização de infraestruturas civis, incluindo ferrovias. Tais ...
• A geotecnia na transição eco-digital das infraestruturas de transporte 

  Neves, J.; Moutinho, S.; Freire, A. C.; Paixão, A.; Bernardo Monteiro; Parente, M.; Cristelo, N.; Gomes Correia, A. (Imprensa da Universidade de Coimbra, 2024-03-08)

  O artigo apresenta uma compilação de exemplos nacionais de investigação, desenvolvimento e inovação relacionados com a transição verde e a transformação digital no âmbito da geotecnia nos transportes e associados às ...
• Evaluating Different Track Sub-Ballast Solutions Considering Traffic Loads and Sustainability 

  Castro, G.; Moura, E.; Motta, R.; Bernucci, L.; Paixão, A.; Fortunato, E.; Oliveira, L.; Quispe, J. (MDPI, 2024-03)

  The railway industry is seeking high-performance and sustainable solutions for sub-ballast materials, particularly in light of increasing cargo transport demands and climate events. The meticulous design and construction ...
• Numerical analysis of a full-scale laboratory testing to simulate heavy haul railway tracks 

  Castro, G.; Moura, E.; Costa, R.; Motta, R.; Bernucci, L.; Fortunato, E.; Paixão, A.; Oliveira, L. (International Heavy Haul Association (IHHA), 2023-08)

  The structural evaluation of heavy haul railroad tracks has always been sought by engineers and researchers to achieve better-performing structures to satisfy the constant need for higher transportation capacity. Physical ...
• Experimental investigation to analyze the effect of cementation on the geomechanical behavior of steel slag mixtures 

  Mica, N.; Rios, S.; Fonseca, A.; Fortunato, E. (ASTM, 2023-08-28)

  The sustainable use of resources requires new strategies to transform industrial byproducts into raw materials for other applications. This approach, inspired by circular economy funda- mentals, can be successfully applied ...
• The use of steel slags in transport infrastructures: a critical review 

  Mica, N.; Rios, S.; Fonseca, A.; Fortunato, E. (ASTM, 2023-07)

  The increasing demand for the development and expansion of transport infrastructures requires alternative solutions that are economically and environmentally viable to provide the necessary raw materials. Transport ...
• Investigating the influence of ballast resilient properties variability on vehicle-track interaction 

  Paixão, A.; Barbosa, T.; Fortunato, E.; Varandas, J. (Railway Engineering, 2023-06-13)

  Railway tracks consist of various components and experience different support conditions along the longitudinal axis. The vertical stiffness of railway tracks varies significantly in space and time, and the resilient ...
• A 3-D numerical study on the long-term evolution of track geometry under varying train speeds 

  Varandas, J.; Gonçalves, V.; Paixão, A.; Fortunato, E. (Railway Engineering, 2023-06-13)

  Railway infrastructure is essential for transportation worldwide, and ensuring its safe and efficient operation is of utmost importance. The ballasted track system is still the most common railway infrastructure type, ...
• Railway track support condition assessment — Preliminary validation tests using a multibody simulation software 

  Morais, J.; Mendes, J.; Fortunato, E.; Calçada, R. (European Conference of Transport Research Institutes, 2023-05)

  Assessing railway track support conditions is an important activity for railway managers around the world. In this context, an alternative and novel methodology to evaluate railway track support conditions is now under ...
• Estudo numérico sobre a influência da velocidade dos comboios na degradação da geometria da via em zonas de transição 

  Varandas, J.; Gonçalves, V.; Paixão, A.; Fortunato, E. (Sociedade Portuguesa de Geotecnia, 2023-05-16)

  As transições ferroviárias, como as entradas em pontes ou passagens inferiores, são locais onde frequentemente se desenvolvem defeitos de geometria de via, que podem colocar em risco a segurança da circulação ferroviária ...
• Definição e análise de curvas de atenuação de vibrações induzidas por tráfego ferroviário 

  Gomes, R.; Colaço, A.; Fortunato, E. (IST, 2023-05-03)

  O crescimento populacional mundial, atualizado recentemente para o valor de 8 mil milhões de pessoas e previsões de cerca de 10 mil milhões em 2055, surge como um dos principais desafios no que toca ao desenvolvimento de ...
• Steel furnace slag aggregate for railway ballast: assessment of abrasion evolution by close-range photogrammetry 

  Paixão, A.; Fortunato, E. (Elsevier, 2022-11)

  Electric Arc Furnace steel slag aggregate has potential for wider application in transport infrastructures. However, the use of steel slag aggregate in the railway ballast layer, as an alternative to natural high quality ...
• Mechanical behaviour of steel slag-rubber mixtures: Laboratory assessment. 

  Alves, R.; Rios, S.; Fortunato, E.; Fonseca, A.; Delgado, B. (MDPI, 2023-01-13)

  Slags and rubber from end-of-life tires represent a liability to the steel and tire industry, causing economic and environmental problems that are difficult to manage. Transport infrastructures can use these industrial ...
• Laboratory 3D rock joint roughness evaluation with basic, uncomplicated close-range photogrammetry 

  Muralha, J.; Paixão, A.; Resende, R.; Fortunato, E. (ISRM - International Society of Rock Mechanics, SPG - Paraguayan Geotechnical Society, 2022-10-18)

  Photogrammetry-based methods using everyday, easily available photographic equipment and free software have gained relevance for roughness measurement of rock joints. However, the influence of some aspects, such as the ...
• Effects of Parallel Gradation Scaling Technique on Permanent Deformation of a Ballast Material 

  Delgado, B.; Fonseca, A.; Fortunato, E.; Paixão, A. (Civil-Comp Press, 2022-08-22)

  This paper investigates possible effects of scale-down technique on the long-term permanent deformation behaviour of the rail ballast, particularly for heavy haul rail track loadings. Two scaled down ballast specimens, of ...

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