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Presentation
A laboratory study of railway ballast behaviour under various fouling degree
Faculty of Engineering - Papers (Archive)
  • Cholachat Rujikiatkamjorn, University of Wollongong
  • Buddhima Indraratna, University of Wollongong
  • Ngoc Trung Ngo, University of Wollongong
  • Matthew Coop, City University of Hong Kong
RIS ID
74135
Publication Date
1-1-2012
Publication Details

Rujikiatkamjorn, C., Indraratna, B., Ngo, N. & Coop, M. (2012). A laboratory study of railway ballast behaviour under various fouling degree. 5th Asian Regional Conference on Geosynthetics (pp. 507-514).

Abstract
This paper presents a laboratory study of interface behavior between ballast and geogrid under various degree of fouling by coal fines. The stress-displacement behaviour of fresh and fouled ballast with geogrid was investigated through a series of large-scale direct shear tests where the fouling degree varied from 0% to 95% Void Contamination Index (VCI), at normal stresses ranging from 15kPa to 75kPa. The results showed that geogrid enhances the shear strength and increases apparent angle of shearing resistance, while only slightly reduces the vertical displacement of the composite geogrid-ballast system. However, when ballast was contaminated by coal fines, the influences of geogrid reinforcement decreased in proportion to the increasing level of fouling. A conceptual normalized shear strength model was introduced to calculate this decrease in peak shear stress and peak angle of shearing resistance caused by coal fouling.
Disciplines
Citation Information
Cholachat Rujikiatkamjorn, Buddhima Indraratna, Ngoc Trung Ngo and Matthew Coop. "A laboratory study of railway ballast behaviour under various fouling degree" (2012) p. 507 - 514
Available at: http://works.bepress.com/crujikiatkamjorn/138/