What is it about?
We examine for the first time the behaviour of ballast, rubbery materials and sand altogether under cyclic loading. Considering parameters such as settlement, ballast breakage and damping ratio for our samples, we then select the best mixture, which is the one with 5% (by ballast weight) of rubbery materials.
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Why is it important?
Ballasted railway tracks lose their mechanical properties significantly when attacked by sand. Their ballast layer gets more rigid and unable to attenuate train-induced vibrations effectively, resulting in necessity of premature tamping operation. Adding rubbery materials (or as we call them TDAs) could considerably revive stiffness and damping characteristics of ballasted tracks. Our findings indicate that by adopting this user-friendly and economical approach, instead of other costly measures (e.g. building sand barriers), this problem is resolved to a large extent.
Perspectives
I love this paper! I know this doesn't sound humble, yet I can't help but feel in this way! True reviewers always help manuscripts improve, and this is mostly the reason I love this paper - their suggestions were incredible in my opinion. Anyway, we hope this research endeavour will be found useful by scholars and practitioners interested in dynamic topics of railway geotechnics.
Mr Ahmad Hosseini
Iran University of Science and Technology
Read the Original
This page is a summary of: Experimental assessment of cyclic behavior of sand-fouled ballast mixed with tire derived aggregates, Soil Dynamics and Earthquake Engineering, July 2017, Elsevier,
DOI: 10.1016/j.soildyn.2017.03.033.
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