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3d coat apply symmetry4/5/2023 ![]() In conclusion, their application experience in railway system demonstrated a problem-oriented developing trend. For further promoting the application of ABM in practice, this review paper tried to comprehensively evaluate existing application forms in terms of design and construction, evaluation and performance, challenge and opportunity, as well as economy and environmental impact. Although Asphalt Based Materials (ABM) as possible solutions have attracted a lot of attentions, concerns on performance exist before their extensive application in railway systems around the world. ![]() This field has therefore been seeking reliable and maintenance-free railway systems. It is anticipated that this review paper will facilitate (1) the exchange of ideas and innovations in the area of the design and construction of railway tracks and (2) the development of unified standards for the design and construction of railway tracks with asphalt and bituminous mixtures.īallast railway system and non-ballast railway system, two main railway types, have encountered impeding challenges with the increasing axle loads, traffic volumes and speed. This paper also provides case studies of projects where asphalt and bituminous mixes have been utilized in railway tracks. Additionally, this paper reviews the design and construction recommendations and procedures for asphalt and bituminous mixes in railway tracks as practiced in different countries. This paper presents a critical review of the research in the application of asphalt and bituminous mixes in railway tracks. This review paper documents the literature related to the utilization of asphalt and bituminous mixes in railway tracks. They can also guarantee an appropriate response under high-speed loads, especially in comparison to a rigid slab track. These potential applications can improve the overall track structure performance and lead to minimizing settlement under heavy loads. These studies indicate the benefits of bituminous material under railways, such as improving a substructure's stiffness and bearing capacity enhancing its dynamic characteristics and response, especially under high-speed train loads waterproofing the subgrade protecting the top layers against fine contamination. Different agencies and research institutes have investigated and suggested various applications. Furthermore, bituminous mixes have been used in railways, both as asphalt and as mortar. The impact of asphalt concrete material in maintaining a low and constant structural vibration, regardless of train weight level, moving speed variations, and weather conditions were investigated, analysed and discussed.Īsphalt is a common material that is used extensively for roadways. The asphalt concrete viscoelasticity behaviour was incorporated into the 3D geogrid-reinforced-pile-supported embankment finite element model through the Prony series to characterise its mechanical response better. The established model was effectively validated by the vibration acceleration and stress measured in the field test section. The high-speed train moving load was modelled as a transitory dynamic load via a user-defined subroutine 3D load in which the track irregularity is incorporated. ![]() ![]() A 3D nonlinear finite element model was developed to simulate Harbin (Dalian (China) instrumented railroad test section accurately. This study investigates the impact of asphalt concrete material in the geogrid-reinforced-pile-supported embankment structure subjected to high-speed train moving. Despite several studies evaluating asphalt concrete effect on the railway mechanical behaviour, its impact assessment remains poorly understood. Intending to improve railway performance, increase its bearing capacity, and reduce vibrations induced by train passage, asphalt concrete has become a material to be integrated into railway construction. Railroad structural behaviour is a significant factor for safety and comfort during high-speed train operation. ![]()
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