Milad Kazemian

57226486190

Publications - 5

Effects of Crumb Rubber-Modified Asphalt as a Pavement Layer in Railways: A Scoping Review

Szabolcs Fischer Amir Hajimirzajan Milad Kazemian Ebrahim Hadizadeh Raeisi Ahmad Davari Ghezelhesar

Publication Name: Infrastructures

Publication Date: 2025-04-01

Volume: 10

Issue: 4

Page Range: Unknown

Description:

Railway track performance and durability face growing challenges from higher speeds, heavier axle loads, and changing environmental conditions. Crumb rubber-modified asphalt (CRMA) offers a sustainable solution by repurposing waste tires into a durable material for railway trackbeds, improving both performance and environmental impact. Following PRISMA-ScR guidelines, this scoping review synthesizes an extensive body of global research on the structural, mechanical, and environmental benefits of CRMA in railway trackbeds. A systematic literature search was conducted across major academic databases, covering studies published over several decades. Selection criteria focused on CRMA applications in railway trackbeds, using keywords such as “crumb rubber-modified asphalt”, “railway track vibration”, and “sustainable railway materials.” After rigorous screening and eligibility assessment, the most relevant peer-reviewed studies were included, emphasizing mechanical performance, durability, and environmental impact. Key findings indicate that CRMA effectively reduces ground vibrations, enhances load distribution, and lowers long-term maintenance costs while promoting sustainable waste management through tire recycling. However, challenges such as optimal mix design, potential emissions, and long-term bonding stability require further investigation. Additionally, the review was limited to English-language studies, potentially omitting relevant non-English research, and some reports were inaccessible during retrieval. This review maps critical research gaps, identifies key areas for future optimization, and highlights CRMA’s potential to advance resilient and eco-friendly railway infrastructure.

Open Access: Yes

DOI: 10.3390/infrastructures10040084

A Fuzzy Framework for Assessing and Prioritizing Railway Infrastructure Retrofitting against Seismic Hazards – A Case Study

Szabolcs Fischer Amir Hajimirzajan Milad Kazemian

Publication Name: Acta Polytechnica Hungarica

Publication Date: 2025-01-01

Volume: 22

Issue: 4

Page Range: 263-283

Description:

The railway system plays a crucial role in a nation's economy and society, extending beyond mere transportation. In earthquake-prone regions like Razavi Khorasan in Iran, railway infrastructure is highly vulnerable to natural disasters, which can severely disrupt train operations. Ensuring the safety of critical infrastructure, including stations, bridges, tunnels, and railway lines, is essential for maintaining operational integrity and public safety. This study evaluates and prioritizes seismic retrofitting measures for railway infrastructures in Razavi Khorasan. The fuzzy Delphi method is used to gather expert opinions, while the Fuzzy VIKOR method facilitates the prioritization process. Key assessment criteria include seismic intensity potential, vulnerability potential of the zone in terms of distance from the fault, the degree of criticality of the infrastructure in terms of the possibility of continuing transportation operations and the current state of the infrastructure in terms of the state of retrofitting against seismic hazards. The findings reveal critical railway segments that require immediate retrofitting interventions and highlight overall vulnerabilities within the system. This paper underscores the effective application of fuzzy logic methodologies in complex decision making scenarios, offering actionable recommendations to enhance the seismic retrofitting of railway infrastructures.

Open Access: Yes

DOI: 10.12700/APH.22.4.2025.4.16

Optimum Train Weighing in Motion using Inertial Sensors

Szabolcs Fischer Morad Shadfar M. Movahedi Rad Milad Kazemian Ahmad Mohammadi Doost Ebrahim Hadizadeh Raisi

Publication Name: Acta Polytechnica Hungarica

Publication Date: 2024-01-01

Volume: 21

Issue: 1

Page Range: 221-240

Description:

Continuous monitoring with advanced equipment and innovative scientific techniques is essential for timely and perfect maintenance. The interaction and dynamic force between wheel and rail is one of the most widely monitored issues. In this paper's case study of ballasted railway tracks in Iran, a set consisting of two separate strain gauge arrays and three different positions for installing accelerometers were designed according to the conditions. After installation, the system was calibrated with a predetermined passing axle load. The dependency of the arrays' and the equipment's installation location with the velocity of the passing axle load was examined as part of the field study after repeated investigation and comparisons of the setups' results. In order to gather data with the least error and the highest level of accuracy, it was decided on the more appropriate array with less dependence and a better installation position.

Open Access: Yes

DOI: 10.12700/APH.21.1.2024.1.14

Effects of Wheel Surface Defects on Ground Borne Vibration

Szabolcs Fischer Farshad Astaraki M. Movahedi Rad Milad Kazemian Milad Akbarivarmaziar Ahmad Mohammadi Doost

Publication Name: Acta Polytechnica Hungarica

Publication Date: 2022-01-01

Volume: 19

Issue: 6

Page Range: 129-141

Description:

Wheel ground borne vibrations, may have a significant impact on human activity and on nearby buildings. In metropolitan cities, metro lines and their development may cause such vibrations. Despite many works and solutions for path and receiver, the excitation source could also have a great effect. Wheel and rail damages are the two sources of vibration which can increase the damage impact by a factor of 5x. Wheel damage would increase dynamic vertical force noticeably and an increase in ground-borne vibration is expected. In this study with the help of finite element modelling, wheel damage including wheel flat, spalling and wheel oval is studied for a slab track and results are discussed. The studied parameters are velocity and wheel damage and their effect on ground-borne vibrations are examined.

Open Access: Yes

DOI: DOI not available

Condition monitoring of vibration at weak parts of rail for ballasted railway tracks in Iran

Farshad Astaraki M. Movahedi Rad Ali Taheri Milad Kazemian

Publication Name: Journal of the Korean Society for Railway

Publication Date: 2021-06-01

Volume: 24

Issue: 6

Page Range: 544-551

Description:

Vibration monitoring has become important in railway tracks for many purposes. One of the most important purposes is to prevent exceeding limits of induced vibration to adjacent residential buildings. In the current study, to measure the level of vibration, a field investigation is carried at three critical positions including a curve, a fishplate and a deflected rail weld. The field study is an old ballasted railway track located at the critical /one of the entrance of Mashhad Railway station in Iran. In this regard, three distinct field tests are performed using accelerometer sensors and the obtained data arc analyzed and assessed. Besides this, vibrations at 5 and 10 m-distancc from the track arc also considered and rccordcd. As the main achievement, results show that induced vibration levels arc highly dependent on the condition of contact surface between wheel and rail

Open Access: Yes

DOI: 10.7782/JKSR.2021.24.6.544