properties of high performance railway ballast

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The Development of a High Performance Material for a ...

The Development of a High Performance Material for a Ballast Layer of a Railway Track ... It does not lose its properties under train loads. ... The purpose of the study is to improve operational properties of a ballast layer. The high performance polymer cement material modified by organic mineral composition containing nanoparticles is the ...

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Ballast Maintenance, Delivered - Railway Age

For ballast maintenance, customers often request the Spec 760: Hi-Rail Rotary Dumps, says Patrick Brown, Sales and Service Coordinator, Rail. The Spec 760 features a 14-foot, 12-cubic-yard elliptical dump body that uses a 180-degree rotating turntable and telescopic hoist to …

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Improving ballast tamping process - Railway Research

However, the properties of the ballast in situ, ... A full-scale railway infrastructure, of 19m long and 2m proof has been realised in the laboratory hall, ... equipped with a high performance tamping unit which reproduces the real sequence of actions on the tracks. For this study, all the parameters

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Optimisation of bitumen emulsion properties for ballast ...

ballast stabilisation by polymers or resins among others, aim to provide a balanced level of stiff-ness and damping properties especially in railway hotspots and transition areas where a smooth varia-tion of these properties (1) can significantly reduce the need for maintenance (10, 12–22). In this regard, bitumen stabilised ballast (BSB)

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Optimisation of bitumen emulsion properties for ballast ...

Furthermore, when ballast degradation reaches a high level (fouled ballast), this can compromise the mechanical performance of the track and accelerate degradation of geometry. In addition, frequent maintenance (tamping), needed to restore track geometry, contributes significantly to ballast degradation, leading to a vicious circle ( 4 ).

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Annual crosstie report 2013 - Railway Track and Structures

Ballast, Ties, Rail. ... through direct contact and says that it's proven against Formosan termites and carpenter ants and has fire-resistance properties. ... however the company is now selling FastPatch high performance rail grouts for imbedded rail installations to light rail and transits.

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Installation of High-Performance Ballast Mats in an Urban ...

Therefore, the installation of →high-performance ballast mats was recommended INTRODUCTION (3) January 2001 Rüdiger G. Wettschureck 6 Euro-Noise´01, January 2001 • Patras, Greece Ballast Mats in an urban railway tunnel in Berlin With the installation of the ballast mats in 1999 a special →underground structure was partly reconstructed and

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Railroad Subgrade Support and Performance Indicators

With high maintenance costs and short maintenance windows, it is becoming more desirable to better understand the performance of subgrade soils under railway loading in the U.S. Figure 2: Typical American track substructure: clean ballast resting on a ballast-soil conglomerate, eventually reaching a …

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Full-scale study of Neoballast section for its application ...

Materials. For this study, two types of ballast were used: conventional ballast type quartzite, commonly used in Spanish railway tracks (Reference ballast); and Neoballast, developed from the same type of aggregates as conventional ballast, by coating them with a commercial binder and rubber particles (smaller than 0.5 mm) from waste tires, and then, obtaining a flexible ballast …

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Railway anti-vibration mats: under ballast and slab ...

Railway anti-vibration material supplied in panels, thickness of 15 to 50 mm, produced using fibres and granules of SBR rubber (Stirene Butadiene Rubber) selected and compacted using a polyurethane glue in a hot process; density 500 kg/m³. A nonwoven, non-stretch synthetic membrane is applied on one side of panel, for added protection.

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Shear Behavior of Railway Ballast Based on Large-Scale ...

Unsatisfactory performance of railway tracks is often associated with the loss of cross level, track profile and track alignment. The in situ condition and the engineering behavior of ballast are also important aspects governing the stability and performance of a given railway track structure.

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Study on structural health monitoring of vertical ...

ity, and high performance-to-cost ratio [1]. Ho wever, the . ... The mechanical properties of railway ballast in a freezing environment are different from those in a normal environment, and these ...

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Dr Louis Le Pen | Engineering | University of Southampton

relative performance of current ballast and sleeper combinations; interaction between earthworks and bridges on railways; mechanical properties of railway ballast (Triaxial testing, Distinct Element Modelling, Particle shape analysis, Contact Mechanics) effects of high speed curving forces due to tilting trains on ballasted track

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Open Foundation-

Study on Dynamic Mechanical Properties of High-Speed Railway Ballast Cement and Mechanism of Ballast Cement. 11. Elkin Ferney Rodrigu. Federal University of Rio de Janeiro. Research on Multifunctional and High-Precision Test Bench for HTS Maglev System and Magnetic Bearing. 12. Frank N. Werfel. Adelwitz Technologiezentrum

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NEOBALLAST: new high-performance and long-lasting …

In this context, NEOBALLAST emerges as a high-performing, long-lasting and eco-friendly ballast aggregate solution designed to overcome two of the most important drawbacks of railway tracks: track degradation and noise and vibrations (N&V).

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An Investigation into the Railway Ballast Grading using ...

the grain size properties of the ballast may be reached by performing periodic surveys of the railway network. II. T BACKGROUND The proposed approach relies on the evidence that a generic object (e.g., a railway ballast aggregate) subjected to the action of an electromagnetic (EM) field holds a …

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High performance bituminous sub-ballast for improving the ...

12%Materials. Two different binders were studied for the creation of the high-performance bituminous sub-ballast layer: a conventional B50/70 bitumen (CB) was used as a reference, having been commonly used in previous asphalt railway tests [9, 20]; and a modified, low-penetration bitumen containing rubber from out-of-use tires ().The latter bitumen is a commercial …

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Geosciences | Free Full-Text | Use of Geogrids and ...

The high damping properties of rubber materials have made them a promising inclusion for rail track as to enhance the energy absorbing characteristics of rail tracks, as well as reduce noise, vibration, ballast degradation and impact damage to track components [11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30]. Since these rubber ...

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Settlement Response of Fibre Reinforced Railway Ballast

The performance of fibre reinforced ballast under vertical cyclic loading was investigated in the Southampton Railway Testing Facility through a series of full size tests. Experiments showed the potential for fibre reinforced ballast to reduce track permanent settlement. The main findings can be summarised as follows:

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New Recycled Aggregates with Enhanced Performance for ...

Values of LA test similar to high quality natural aggregate (around 15 to 20). Usually, limit is set on 20 or 25 for ballast, less for subgrade and formation layer. High abrasion resistance is also confirmed by Microdeval and Polished Stone Value (PSV). Test shown MD below 20 and PSV between 57 to 65, within the "high performance" category.

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An experimental study on the characteristics of ...

Boler showed that polyurethane improved ballast properties including friction angle (from 34.8° to 40.7°) and cohesion (from 97.4 to 271 kPa). Kim et al. evaluated the effect of polyurethane materials on ballast performance (acceleration and settlement) in operating lines, …

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(PDF) Railway ballast characteristics, selection criteria ...

The Norwegian National Railway Administration in the 1950s adopted the test to investigate the performance of railway ballast (Nålsund 2014). The EN-1097-2 requires a standardized particle size ...

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Railway ballast stabilising agents: Comparison of ...

The tested particle size distribution (PSD) is displayed in Table 2, each sample consisted of 5100 g of dry ballast material.The tested PSD is a downscaled version of railway ballast by factor 0.5: the maximum particle size to be tested is recommended to be one fifth of the sample diameter 150 mm as indicated by the code .Even if the downscaling process has an impact on the measured mechanical ...

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ABRASION RESISTANCE OF CONCRETE AND THE USE OF …

1.2 Definition of High Performance Concrete (HPC) The design principles behind HPC have evolved with time. In the late 1970s, there was a focus on high strength concrete. Today, however, HPC is recognized as much more than just a very strong concrete; it also demonstrates improved properties, such as high durability and abrasion resistance.

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Influence of Size and Shape Properties of Railroad Ballast ...

of aggregate shape properties on particle packing and therefore opti-mized ballast gradations (11). Findings are presented here from an ongoing ballast DEM modeling research effort at the University of Illinois on statistical analyses of railroad ballast aggregate packing influenced by changes in gradation and particle shape properties.

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Track Ballast | Aggregate Industries

Our Gabion stone, is Glensanda Granite sized 90-180mm and meets EN 13383-1:2002, and other sizes of rock armour are available. SuperFlow JointAgg. Aggregate Industries SuperFlow JointAgg is a high performance finishing aggregate specifically designed for brushing into block pavement joints.

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[PDF] LONG-TERM EFFICIENCY OF BALLAST MATS INSTALLED IN ...

In 1983, ballast mats of type Sylomer B 851 were installed in a rapid transit railway tunnel near the Philharmonic Hall of Munich, Germany, in order to shield it from the structure-borne noise emitted from the passage of trains. In 2001, after 18 years of use under extremely demanding load conditions, tests were conducted to determine the long-term effectiveness of the noise mitigation measure ...

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BALLAST MAT INFRASTRUCTURE

life of the ballast. Ballast Mat reduced the Vertical Track Modulus (VTM) by 55 percent in concrete tie track. The impacts at mid-span were reduced by 30 to 40 percent on bridges. Progress Rail's high-performance Ballast Mats are produced from recycled rubber, resulting in a lower natural frequency compared to traditional ballast mats. This ...

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Slag aggregates for railway track bed layers: monitoring ...

The high performance of SFS-Rail against abrasion is confirmed by the results of the Micro-Deval (MD) test and the polished stone value (PSV). Thus, SFS-Rail showed a MD below 20, in compliance with the Spanish norm [7], while it offers a PSV between 57 and 65, which is within the aggregates "High Performance"

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Development and Evaluation of High Performance Rail …

Development and Evaluation of High Performance Rail Steels for Heavy Haul Operations Daniel Szablewski, SemihKalay, Joseph LoPresti ... preliminary wear results for each rail type. The mechanical property data will be related to the rail wear in ... the track in both sections 3 and 7wasrenewedprior to rail installation. Ballast was screened and ...

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Effect of Differential Ballast Settlement on Dynamic ...

An improved vehicle-track coupled dynamics model that takes into account the differential ballast settlement is presented in this paper. Central to this formulation is an iterative method for acquiring the mapping relationship between the ballast settlement and the deflection of rail …

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Studying the Effects of the Loram HP Shoulder Ballast ...

Loram High Performance Shoulder Ballast Cleaner (SBC) as the exclusive method of ballast maintenance. Over 800 km of main line has been cleaned with the SBC with minimal track occupancy (less than 400 hours). 2. RAILWAY BALLAST The railway ballast section is a layer of stones

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