properties of high performance railway ballast

Geotechnical properties of ballast and the role of ...

Geotechnical properties of ballast and the role of geosynthetics in rail track ... in governing the stability and performance of railway tracks. The deformation and degradation behaviour of ... Good-quality railway ballast should have angular particles, high specific gravity, high shear strength, high toughness and hardness, high resistance to ...

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

Jan 01, 2017  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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Railroad Ballast Testing and Properties

discussed field testing of railway ballast and the second session discussed laboratory testing of railway ballast. The symposium ended with a panel discussion moderated by Professor Timothy D. Stark, which developed a list of Ballast Research and Test Method Needs.

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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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Research on Railroad Ballast Specification and Evaluation

The effect of grading variation and its effect on track performance ... rock, slag, and gravel railway ballast sources are summarized in this paper. Comments are included about the new Canadian Pacific Rail ballast specif i­ ... chemistry because their properties as ballast aggre­ ...

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NEOBALLAST: new high-performance and long-lasting ballast ...

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 (NV).

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Railway ballast stabilising agents: Comparison of ...

Aug 20, 2020  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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The requirements of AS 2758.7 - 2009

rail itself to lock them in place to resist the high loads from passing trains (Figure 1). Rail ballast must interlock to provide this load transfer and track stability. The properties of rail ballast aggregate are therefore very important to the effective load carrying capacity of the rail structure and the subsequent in-

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Survey of Railway Ballast Selection and Aspects of ...

parts of the railway structure which has great influence on the performance of the railway track. The aim of this project is to assess the different aspects which affect the overall performance on the ballast structure, its material characterization, gradation, failure modes and modelling techniques.

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iCivil Engineer: Ballast: Functions Properties

Ballast: Functions Properties. Functions. Provide a hard and level bed for sleepers. Hold sleepers in place during passage of trains. Transfers and distributes load from sleepers to larger area. Provides effective drainage and keep sleeper dry. Prevent vegetation growth. Prevents water

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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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BALLAST MAT INFRASTRUCTURE

Dec 13, 2018  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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Sorigué in the Neoballast innovation project Sorigué

Under the title “New high-performance and long-lasting ballast for sustainable railway infrastructure”, Neoballast seeks to improve the mechanical properties of ballast, a material produced for use in the support platforms of railroads to reduce degradation and absorb vibrations and noise from the rails. The consortium is comprised of Sorigué (with 6% share), the Catalan companies Comsa ...

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Railway track settlements - a literature review

2. Railway ballast 6 2.1 Ballast materials, requirements and properties 6 2.2 Experimental measurements on ballast 7 2.3 Ballast modelling 8 3. Track settlement 9 3.1 Experimental measurements on track settlements 11 3.2 Track stiffness measurements 12 3.3 Modelling ballast and track settlements 14 4.

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Performance testing of geogrid-stabilised ballast and sub ...

DOI link for Performance testing of geogrid-stabilised ballast and sub-ballast subjected to high speed rail forces. Performance testing of geogrid-stabilised ballast and sub-ballast subjected to high speed rail forces book. By Z. Yu, D.P ... The material properties of track materials with and without geogrid can be tested under realistic ...

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The effect of the sub-ballast layer material to the ...

The effect of the sub-ballast layer material to the performance of a railway embankment J. J. Vinter*1 and L. K. Korkiala-Tanttu2 1 Pöyry Finland Oy, Vantaa, Finland 2 Aalto University, Espoo, Finland * Corresponding Author ABSTRACT Higher operating speeds and heavier axle loads cause greater demands on the existing railway structures.

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8 Requirements of the good ballast – Civil Engineering

Dec 20, 2018  Ideal ballast should possess the following characteristics. Following 8 Requirements of the good ballast are: It should be hard and tough. It should not be brittle and porous. It should have sufficient elasticity. It should allow easy drainage with minimum leakage. It should be wear-resistant and durable. It should retain its position laterally ...

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Test Measurements and Performance Evaluations of In ...

performance evaluations have shown numerous advantages over traditional all-granular (ballast) trackbeds (Rose, Brown, and Osborne, 2000). The most common HMA trackbed, termed asphalt underlayment as depicted in Figure 1b, incorporates a layer of HMA in lieu of the subballast. Ballast is used above the HMA layer in a similar manner

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TRACK COMPONENTS AND FUNCTIONS CIVIL ENGINEERING

Dec 17, 2016  Figure 5. Example of railway ballast. Ballast is designed to resist the track forces, provide resiliency, provide void storage, facilitate maintenance, provide drainage, and reduce stress to the subballast. For more information on ballast see the section Ballast Properties. Subballast

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A Numerical Study on Structural Performance of Railway ...

This numerical study investigates the structural performance of railway sleepers made of ultra high-performance concrete (UHPC). First, numerical concrete sleepers are developed, and the tensile stress-strain relationship obtained from the direct tension test on the UHPC coupons is used for the tensile constitutive model after applying a fiber orientation reduction factor.

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New Recycled Aggregates with Enhanced Performance for ...

Apr 04, 2015  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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Likitlersuang et al.: Numerical Modelling of Railway ...

Table 2 Recommended ballast properties (SRT 1994) Properties Value ... performance of high railway embankment reinforced by micro piles using both physical and numerical modelling. The 3D finite

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Ballast Maintenance, Delivered - Railway Age

Nov 06, 2020  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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Dynamic Behavior in Transition Zones and Long-Term Railway ...

Transition zones between embankments and bridges or tunnels are examples of critical assets of the railway infrastructure. These locations often exhibit higher degradations rates, mostly due to the development of differential settlements, which amplify the dynamic train-track interaction, thus further accelerating the development of settlements and deteriorating track components and vehicles.

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Effect of Geogrid Reinforcement on Railroad Ballast ...

Effect of Geogrid Reinforcement on Railroad Ballast Performance Evaluated Through Triaxial Testing and Discrete Element Modeling ... Geogrids are commonly used in railway track construction for ballast and sub-ballast stabilization purposes. ... biaxial geogrids only have high tensile strength properties mainly in two directions, machine ...

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SHEAR BEHAVIOR OF RAILWAY BALLAST BASED ON LARGE

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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Mechanical Strength ˚uality Construction Cost Savings High ...

High Performance Easy Installation Extended Maintenance Interval. About Us ... properties and functions that are required, manufacturing the solution and then ... 800mm of rail ballast using a standard geotextile separator in each case, between the stone ballast and clay layers. All of

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Improved performance of geosynthetics enhanced ballast ...

Oct 16, 2018  Geotechnical properties of ballast and the role of geosynthetics in rail track stabilisation Authors: B. Indraratna , H. Khabbaz , W. Salim , D. Christie Source: Proceedings of the Institution of Civil Engineers - Ground Improvement, Volume 10, Issue 3 , 1 Jul 2006 (91–101)

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Likitlersuang et al.: Numerical Modelling of Railway ...

Table 2 Recommended ballast properties (SRT 1994) Properties Value ... performance of high railway embankment reinforced by micro piles using both physical and numerical modelling. The 3D finite

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Sorigué in the Neoballast innovation project Sorigué

Under the title “New high-performance and long-lasting ballast for sustainable railway infrastructure”, Neoballast seeks to improve the mechanical properties of ballast, a material produced for use in the support platforms of railroads to reduce degradation and absorb vibrations and noise from the rails. The consortium is comprised of Sorigué (with 6% share), the Catalan companies Comsa ...

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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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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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New Recycled Aggregates with Enhanced Performance for ...

Apr 04, 2015  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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Track Ballast Aggregate Industries

Aggregate Industries SuperFlow SuDSAgg is a high performance sub-base aggregate specifically designed to provide controlled water management within Sustainable Drainage Systems (SuDS) SuperFlex® A winning range of polymer modified surface course materials for urban and rural areas that combines the properties of high fatigue resistance with ...

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Ballastless track - Superstructure :: Trackopedia

The railway permanent way has an average useful life of between 30 and 60 years. Because of the large financial investments that are necessary, innovations in the field of railway infrastructure only gain acceptance slowly. ... no flying ballast at high speeds; unrestricted use of the eddy current brake; ... This book is dedicated to the many ...

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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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Dynamic Behavior in Transition Zones and Long-Term Railway ...

Transition zones between embankments and bridges or tunnels are examples of critical assets of the railway infrastructure. These locations often exhibit higher degradations rates, mostly due to the development of differential settlements, which amplify the dynamic train-track interaction, thus further accelerating the development of settlements and deteriorating track components and vehicles.

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Behaviour of Steel Slag Ballast for Railway under Cyclic ...

Steel industry produces substantial amount of steel slag as a by-product generated during manufacturing of pig iron and steel. The steel slag has huge potential to be used in Indian Railways as a...

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