Oral Presentation

¹Sayed Ahmed; ²Hossam Atef ; ¹Mohamed Husain

¹Department of Structural Engineering, Faculty of Engineering, Zagazig University, Zagazig, Egypt

²Track work department, National Authority for Tunnels, Egypt

The life span of railways is one of the most important concerns of rail systems, where rail fastening systems play a key role in extending the life span of the railway. The fastener system plays a necessary role in fixing the rail on the sleeper. The fastener system's tasks ensure the process's safety during operation. The quality of the fastener system directly affects the safety performance of trains. In this research, four different types of ultra-high performance fiber reinforced concrete (UHPFRC) mixtures with two types of steel fiber (50% end-hooked and 50% corrugated) with the same aspect ratio fabricated the pre-stressed concrete sleepers (B70). In addition, the control mix with traditional concrete C50 was tested. From laboratory investigation, this paper clarifies the impact of ultra-high performance fiber reinforced concrete admixture on the pull-out resistance for the fastening system in sleeper B70 and the effect of increasing the amounts of fiber on this test. The steel fiber improved the resistance of the pull-out of the fasting system. This investigation study will provide some guidance on developing UHPFC sleepers with steel fiber.

Ultra-high performance fiber reinforced concrete (UHPFRC); concrete sleeper; Steel fiber; pull-out test

Structural and Construction Engineering