Toggle Main Menu Toggle Search

Open Access padlockePrints

Investigating the effect of different adhesion materials on electrical resistance using a high pressure torsion rig

Lookup NU author(s): Dr Sadegh NadimiORCiD



This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).


This paper presents an assessment of newly-developed conductive adhesion materials (Products A-E) in comparison to standard rail sand used in Britain. Current rail sand is an insulating material which can affect track circuits; newly-developed conductive materials could reduce the risk of this and allow for more material to be applied to further mitigate against low adhesion. The particles were characterised to determine their densities, and size and shape distributions. Bulk behaviour was assessed through three characteristics: angle of repose, bulk shear strength, and particle breakage index. Materials were then assessed using a high pressure torsion approach to measure their effects on adhesion and electrical resistance in dry, wet, and leaf contaminated conditions. It was found that all products produced better or equivalent conductivity compared to the currently used GB rail sand and that Product D and Product E should be considered for future field testing.

Publication metadata

Author(s): Skipper W, Nadimi S, Gutsulyak DV, Butterfield JG, Ball T, Lewis R

Publication type: Article

Publication status: Published

Journal: Wear

Year: 2023

Volume: 532-533

Print publication date: 15/11/2023

Online publication date: 09/09/2023

Acceptance date: 07/09/2023

Date deposited: 13/09/2023

ISSN (print): 0043-1648

ISSN (electronic): 1873-2577

Publisher: Elsevier BV


DOI: 10.1016/j.wear.2023.205116


Altmetrics provided by Altmetric


Funder referenceFunder name
The Royal Academy of Engineering
The Rail Safety Standards Board (COF-UOS-03)