Dependence of shape on particle size for a crushed rock railway ballast

Le Pen, L., Powrie, W., Zervos, A., Ahmed, S. and Aingaran, S. (2013) Dependence of shape on particle size for a crushed rock railway ballast Granular Matter, 15, (6), pp. 849-861. (doi:10.1007/s10035-013-0437-5).


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Laboratory testing of railway ballast poses practical difficulties because the particle size is often too large for most standard apparatus. There are therefore advantages in developing a scaled material whose behavior is representative of the full size material. A first stage in validating such an approach is to investigate whether the particle shape is affected by the change in scale. This paper sets out methods for evaluating form and roundness (aspects of shape) and proposes a new measure for evaluating roundness, termed ellipseness. These methods are then applied to a crushed rock railway ballast over a range of particle sizes. Statistical analysis demonstrates a measurable variation in the distributions of form and roundness with particle size over a range of sieve intervals, although the differences are slight and do not necessarily rule out the use of a scaled material for investigating the factors influencing macro mechanical behavior.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1007/s10035-013-0437-5
ISSNs: 1434-5021 (print)
Keywords: ballast, shape, form, statistics, weibull, scale, roundness, angularity, ellipseness
Subjects: T Technology > TF Railroad engineering and operation
Organisations: Infrastructure Group
ePrint ID: 358019
Date :
Date Event
18 August 2013e-pub ahead of print
1 December 2013Published
Date Deposited: 08 Oct 2013 13:21
Last Modified: 17 Apr 2017 14:53
Further Information:Google Scholar

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