Your browser is no longer supported

For the best possible experience using our website we recommend you upgrade to a newer version or another browser.

Your browser appears to have cookies disabled. For the best experience of this website, please enable cookies in your browser

We'll assume we have your consent to use cookies, for example so you won't need to log in each time you visit our site.
Learn more

Technical Paper: Performance of geogrid-reinforced ballast

By Glenn McDowell, Nottingham Centre for Geomechanics, School of Civil Engineering, University of Nottingham, and Peter Stickley, BWB Consulting. This paper was first published in GE’s January 2006 issue.

Introduction

It has been shown (McDowell et al, 2004a) that the behaviour of different ballasts varies enormously.

McDowell et al (2004a) examined the performance of each of four different ballasts in a box test simulating train loading and rearrangement caused by tamping and were able to correlate the results in terms of settlement and degradation with simple index tests such as the Los Angeles Abrasion value and the Micro-Deval Attrition value (as defined in BS EN 13450: 2002 (British Standards Institution, 2002)).

In that paper, one ballast was clearly inferior to the others in terms of performance. In a subsequent paper, McDowell et al (2004b) investigated using the same box test method, as to whether a weak ballast could be mixed with a strong ballast to give a ballast mixture which meets current specifications, and how much weak ballast could be included without adversely affecting the performance of the mixture to a significant extent. This would allow the selection of an appropriate amount of weaker, cheaper aggregate for inclusion in rail trackbeds, reducing ballast cost.

Have your say

You must sign in to make a comment

Please remember that the submission of any material is governed by our Terms and Conditions and by submitting material you confirm your agreement to these Terms and Conditions. Please note comments made online may also be published in the print edition of New Civil Engineer. Links may be included in your comments but HTML is not permitted.