Evaluation of bituminous sub-ballast manufactured at low temperatures as an alternative for the construction of more sustainable railway structures

Pirozzolo, L.; Sol-Sánchez, M.; Moreno-Navarro, Fernando; Montes, Germán Martínez; Rubio-Gámez, M.C.

doi:10.3989/mc.2017.04816

Cited by 11 publications

(4 citation statements)

References 15 publications

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“…If the asphalt is mixed with aggregate material, then the asphalt will become a binding material between the ballast aggregates [9] so that it can increase the resistance of the ballast layer against the influence of dynamic loads [4]. Addition of asphalt material can also reduce vertical deformation in the ballast layer because it is influenced by the percentage and thickness of the asphalt layer [10], [11], [12]. Besides, D'Angelo et al and D'Andrea et al also stated that mixing ballast material with asphalt as a binding material can increase the material durability of ballast and reduce maintenance work so that it can reduce ballast maintenance costs [10], [5].…”

Section: Introductionmentioning

confidence: 99%

Vertical Deformation and Ballast Abrasion Characteristics of Asphalt-Scrap Rubber Track Bed

Setiawan

Rosyidi

2018

Int. J. Adv. Sci. Eng. Inf. Technol.

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Innovations in the field of railroad construction need to be improved, especially in the ballast layer which is an essential structure in conventional railways. The purpose of this study was to analyse the characteristics of vertical deformation and ballast material abrasion with 10% of scrap rubber in two types of sizes (uniform and graded) and with 3% of asphalt. This study uses a compressive test method with six types of samples modeled with ballast boxes measuring 400 x 300 x 200 mm. The test results present that the use of 10% scrap rubber can increase the vertical deformation value significantly to 84%. On the other hand, the use of 3% asphalt can minimize vertical deformation to only 14% because asphalt can increase the ballast layer stiffness. Furthermore, it can also be concluded that in general, the use of 10% scrap rubber and 3% asphalt can reduce the percentage of material abrasion up to 80%. Besides, it also can be known that the use of graded sized scrap rubber material is the most effective in increasing material durability. Scrap rubber and asphalt have the potential to be used together on ballast layers which are expected to be a solution of the problems related to the service-life and ballast maintenance work.

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Section: Introductionmentioning

confidence: 99%

Vertical Deformation and Ballast Abrasion Characteristics of Asphalt-Scrap Rubber Track Bed

Setiawan

Rosyidi

2018

Int. J. Adv. Sci. Eng. Inf. Technol.

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“…These second test types aimed to evaluate the mechanical performance of the materials under more realistic loading conditions; given that most of the standard tests used for asphalt materials are primarily focused on its more common application for road pavements. These innovative tests covered the resistance to deformation and fatigue cracking, under punching efforts and stresses, from the simulation of the loads from ballast layer; where these laboratory tests have been previously used for similar goals [9,11].…”

Section: Methodsmentioning

confidence: 99%

“…Given the potential benefits outlined, and under the aim of providing more confidence for the widespread implementation of bituminous sub-ballast, several other recent studies have also been carried out to further explore this structural solution. In this sense, the study of more sustainable solutions, such as including recycled materials (such as using reclaimed asphalt from road pavements) in the design of the bituminous sub-ballast [10] or defining alternative manufacturing processes to reduce energy consumption like using bitumen additives to decrease mixing temperatures [11]. Furthermore, further studies focused on the structural performance in laboratory testing boxes have been recently carried out too [12,13] proving the effectiveness of this solution to reduce track settlement or increasing the global bearing capacity.…”

Section: Introductionmentioning

confidence: 99%

High performance bituminous sub-ballast for improving the structural behaviour and durability of railway track substructure

et al. 2021

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Bituminous sub-ballast is considered as an appropriate solution for increasing the structural performance and durability of railway sub-structure. This is especially prominent due to the continuous development of trains, which are capable of circulating at ever faster speeds and transporting evermore freight. Thus, the base infrastructure for trains must also evolve both structurally and sustainably. In this sense, the use of high modulus asphalt mixtures can increase the bearing capacity of the structure, while with the addition of modified bitumen during manufacture could present a promising potential for the improvement of the structural performance and durability of the infrastructure. Therefore, this study focused on assessing the viability and potential benefits of using a high-performance asphalt mixture, manufactured with a highly rubberized low-penetration bitumen, for sub-ballast in railway tracks. To achieve this aim, the behaviour of the high-performance asphalt mixture was compared to a reference asphalt mixture, manufactured with conventional bitumen, which is typically used as bituminous subballast. A series of standard laboratory tests were carried out for both mixtures, as well as two innovative tests to better assess the main failure modes expected in railway applications. In addition, a cost analysis evaluated the economic impact of the high-performance asphalt mixture in comparison with the conventional solution. Results demonstrated that the proposed mixture presented a higher bearing capacity than the conventional bituminous sub-ballast, while reducing around 50% the permanent deformations and susceptibility to cracking under similar efforts. These results indicate that the layer thickness of the modified mixture could thus be reduced by half, and still offer similar mechanical performance to the conventional mixture. In turn, this would provide a potential economic saving higher than 30%, compared to the conventional standard solution for sub-ballast.

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“…When mixed with aggregate materials, asphalt will improve the binding of the aggregate [20] and reduce the impact of dynamic loads as demonstrated by improved stiffness modulus [17]. Adding asphalt helps minimizing vertical settlement in ballast layer due to the percentage and thickness of the asphalt [21].…”

Section: Introductionmentioning

confidence: 99%

Utilization of 60/70 penetration grade asphalt on ballast structures with the variation of percentage and the number of pouring layers

Setiawan

2019

Journal of the Mechanical Behavior of Materials

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Railroad ballast structure layer may experience a decline in mechanical and geometrical performance due to heavy train and environmental loads. In order to improve the quality of ballast structure, the addition of asphalt to ballast layer can be considered as a solution. Therefore, this research utilizes 60/70 penetration grade asphalt for ballast layer binding and stabilization. The objective of this study was to evaluate and analyze the mechanical behavior of clean-ballast and fouled-ballast layers with 2% and 4% penetration grade 60/70 asphalt poured in one (ballast surface layer) and three ballast surface layers. Compressive strength test was performed to analyze the weight of specimen, vertical deformation, and ballast material abrasion. The most prominent finding to emerge from this research was that the use of 60/70 penetration grade asphalt on ballast surface layer is crucial in retaining the load applied by UTM, in order to produce preferable load distribution to the entire ballast structure. It is found that, the higher the 60/70 penetration grade asphalt proportion and the more layers poured with asphalt, the stronger asphalt in reducing ballast abrasion percentage.

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Evaluation of bituminous sub-ballast manufactured at low temperatures as an alternative for the construction of more sustainable railway structures

Cited by 11 publications

References 15 publications

Vertical Deformation and Ballast Abrasion Characteristics of Asphalt-Scrap Rubber Track Bed

Vertical Deformation and Ballast Abrasion Characteristics of Asphalt-Scrap Rubber Track Bed

High performance bituminous sub-ballast for improving the structural behaviour and durability of railway track substructure

Utilization of 60/70 penetration grade asphalt on ballast structures with the variation of percentage and the number of pouring layers

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