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Civil-Comp Proceedings
ISSN 1759-3433 CCP: 104
PROCEEDINGS OF THE SECOND INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE Edited by: J. Pombo
Paper 45
New Recycled Aggregates with Enhanced Performance for Railway Track Bed and Form Layers C. Saborido Amate
COMSA EMTE R&D Department, Barcelona, Spain C. Saborido Amate, "New Recycled Aggregates with Enhanced Performance for Railway Track Bed and Form Layers", in J. Pombo, (Editor), "Proceedings of the Second International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 45, 2014. doi:10.4203/ccp.104.45
Keywords: subballast, subgrade, aggregate, recycled, slag, abrasion.
Summary
The use of aggregates with high abrasion resistance is key to guarantee a good track
performance over time; however to obtain high-quality aggregates is not always
feasible at reasonable cost. Because of this, the creation of new alternatives with
lower life cycle costs and lower environmental impact, such as SFS-Rail, is
fundamental for the economical and environmental sustainability of the railway
infrastructure. SFS-Rail are recycled aggregates from electric arc furnace slags for
use in subgrade and subballast layers and that offer excellent physical and
mechanical properties. In this paper, a first review of the use of ferrous slag in civil
applications is carried out. Next, the SFS-Rail aggregates are described as well as
their main benefits in terms of track performance. Furthermore, an analysis of the
results from laboratory tests undertaken on SFS-Rail are undertaken in order to
prove that they comply with the existing European norms regulating the use of
aggregates for track bed layers. Finally, the characteristics of the field tests, and its
monitoring, that will take place next year are briefly explained.
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