A laboratory study of railway ballast behaviour under various fouling degree

C. Rujikiatkamjorn; B. Indraratna; N. T. Ngo; M. Coop

A laboratory study of railway ballast behaviour under various fouling degree

C. Rujikiatkamjorn, B. Indraratna, N. T. Ngo, M. Coop

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

24 Citations (Scopus)

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.

Original language	English
Title of host publication	GA 2012 - 5th Asian Regional Conference on Geosynthetics: Geosynthetics for Sustainable Adaptation to Climate Change
Publisher	Asian Center for Soil Improvement and Geosynthetics
Pages	507-514
Publication status	Published - 2012
Event	5th Asian Regional Conference on Geosynthetics of Geosynthetics Asia 2012: Geosynthetics for Sustainable Adaptation to Climate Change, GA 2012 - Bangkok, Thailand Duration: 13 Dec 2012 → 16 Dec 2012 http://geosynthetics-asia2012.com/ (unknown)

Conference

Conference	5th Asian Regional Conference on Geosynthetics of Geosynthetics Asia 2012: Geosynthetics for Sustainable Adaptation to Climate Change, GA 2012
Place	Thailand
City	Bangkok
Period	13/12/12 → 16/12/12
Internet address	http://geosynthetics-asia2012.com/ (unknown)

Research Keywords

Ballast
Fouling
Geogrid
Interface behaviour

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@inproceedings{b6f170335353484c8a038711f1ccdb6e,

title = "A laboratory study of railway ballast behaviour under various fouling degree",

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.",

keywords = "Ballast, Fouling, Geogrid, Interface behaviour",

author = "C. Rujikiatkamjorn and B. Indraratna and Ngo, {N. T.} and M. Coop",

year = "2012",

language = "English",

pages = "507--514",

booktitle = "GA 2012 - 5th Asian Regional Conference on Geosynthetics: Geosynthetics for Sustainable Adaptation to Climate Change",

publisher = "Asian Center for Soil Improvement and Geosynthetics",

note = "5th Asian Regional Conference on Geosynthetics of Geosynthetics Asia 2012: Geosynthetics for Sustainable Adaptation to Climate Change, GA 2012 ; Conference date: 13-12-2012 Through 16-12-2012",

url = "http://geosynthetics-asia2012.com/",

}

Rujikiatkamjorn, C, Indraratna, B, Ngo, NT & Coop, M 2012, A laboratory study of railway ballast behaviour under various fouling degree. in GA 2012 - 5th Asian Regional Conference on Geosynthetics: Geosynthetics for Sustainable Adaptation to Climate Change. Asian Center for Soil Improvement and Geosynthetics, pp. 507-514, 5th Asian Regional Conference on Geosynthetics of Geosynthetics Asia 2012: Geosynthetics for Sustainable Adaptation to Climate Change, GA 2012, Bangkok, Thailand, 13/12/12.

A laboratory study of railway ballast behaviour under various fouling degree. / Rujikiatkamjorn, C.; Indraratna, B.; Ngo, N. T. et al.
GA 2012 - 5th Asian Regional Conference on Geosynthetics: Geosynthetics for Sustainable Adaptation to Climate Change. Asian Center for Soil Improvement and Geosynthetics, 2012. p. 507-514.

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

TY - GEN

T1 - A laboratory study of railway ballast behaviour under various fouling degree

AU - Rujikiatkamjorn, C.

AU - Indraratna, B.

AU - Ngo, N. T.

AU - Coop, M.

PY - 2012

Y1 - 2012

N2 - 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.

AB - 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.

KW - Ballast

KW - Fouling

KW - Geogrid

KW - Interface behaviour

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M3 - RGC 32 - Refereed conference paper (with host publication)

SP - 507

EP - 514

BT - GA 2012 - 5th Asian Regional Conference on Geosynthetics: Geosynthetics for Sustainable Adaptation to Climate Change

PB - Asian Center for Soil Improvement and Geosynthetics

T2 - 5th Asian Regional Conference on Geosynthetics of Geosynthetics Asia 2012: Geosynthetics for Sustainable Adaptation to Climate Change, GA 2012

Y2 - 13 December 2012 through 16 December 2012

ER -

A laboratory study of railway ballast behaviour under various fouling degree

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