EP3061867B1 - Ballast and method for producing same - Google Patents
Ballast and method for producing same Download PDFInfo
- Publication number
- EP3061867B1 EP3061867B1 EP14856708.4A EP14856708A EP3061867B1 EP 3061867 B1 EP3061867 B1 EP 3061867B1 EP 14856708 A EP14856708 A EP 14856708A EP 3061867 B1 EP3061867 B1 EP 3061867B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ballast
- polymer layer
- aggregate
- elastomer material
- aggregates
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 239000000463 material Substances 0.000 claims description 50
- 229920001971 elastomer Polymers 0.000 claims description 42
- 239000000806 elastomer Substances 0.000 claims description 41
- 229920000642 polymer Polymers 0.000 claims description 40
- 239000008187 granular material Substances 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 13
- 239000002861 polymer material Substances 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 7
- 238000007711 solidification Methods 0.000 claims description 7
- 230000008023 solidification Effects 0.000 claims description 7
- 238000009826 distribution Methods 0.000 claims description 6
- 229920002635 polyurethane Polymers 0.000 claims description 4
- 239000004814 polyurethane Substances 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims description 2
- 238000001035 drying Methods 0.000 description 7
- 239000002994 raw material Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 238000011109 contamination Methods 0.000 description 2
- 238000013467 fragmentation Methods 0.000 description 2
- 238000006062 fragmentation reaction Methods 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000012512 characterization method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229920001688 coating polymer Polymers 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000011253 protective coating Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B1/00—Ballastway; Other means for supporting the sleepers or the track; Drainage of the ballastway
- E01B1/001—Track with ballast
Definitions
- the present invention relates to a ballast with improved characteristics in terms of durability and resistance to fragmentation with respect to other rail track bed materials.
- the invention also relates to the method for producing said improved ballast.
- ballast as a rail track bed is widely known, but it has some drawbacks.
- the aggregate suitable for this use must meet required characteristics which are more exacting the higher the speed of the trains is or the higher the load that said trains transport, the sharpness of the edges of the aggregate being one of the essential characteristics, because said sharpness is what provides stability and prevents the ballast from flowing and causing track deformations with train vibrations.
- the difficulty in finding aggregates that meet all the characteristics required by sets of technical specifications makes them more expensive and leads to the need to move them over great distances, making them even more expensive.
- WO2011131621A1 Some products and methods for mitigating these drawbacks are known, such as for example, the invention described in patent document WO2011131621A1 , where it anticipates the use of a ballast layer impregnated with a component which is subsequently sprayed with a second component producing a reaction, generating a protective polyurethane layer binding the ballast and prolonging its service life, but at the expense of complicating its maintenance or replacement, in addition to achieving an excessively monolithic result, greatly reducing the elasticity of the assembly. It must also be pointed out that the application of said chemical components in-situ can cause environmental contamination problems.
- WO 2013/120059 A1 further discloses a crushed ballast consisting of aggregates individually coated with a polymer layer that integrates a granular elastomer material.
- the proposed invention relates to a crushed ballast with improved durability and resistance to fragmentation for rail infrastructures, consisting of aggregates with a particle size distribution selected from between 25 mm and 100 mm, individually coated with a first solidified polymer layer which integrates a granular elastomer material with granules having a size smaller than 4 mm, preferably having a size smaller than 2 mm.
- the vibrations can be absorbed by these granules, without causing the mentioned aggregates to wear out at all, such that the service life of the ballast is prolonged along with its elasticity, making it unnecessary to arrange elastomer parts between the ties and the ballast or between the tracks and the ties.
- a reduction in the noise level produced by the passage of trains as well as a reduction in the ballast-flying phenomenon as the train passes are also achieved.
- an aggregate treated accidentally pelted against the undersides of the train would cause less damage as it is coated with an elastomer material.
- a second polymer layer over the aggregate provided with the elastomer material adhered with the first polymer layer, said second polymer layer providing a protective coating for protecting the elastomer material, and an increased fixing.
- This arrangement allows using aggregates which, before receiving the proposed coating, do not have the characteristics required for use thereof as a rail ballast, either because their edges are not sharp enough, or because of another reason.
- the granular elastomer material can originate from the shredding of recycled material, such as for example, tires, which increases the value of highly polluting waste, and allows giving it a new use, in addition to taking advantage of its properties with a competitive cost.
- the polymer material will be a material from the polyurethane family, since its elasticity and resistance properties, as well as its drying process and compatibility with other raw materials that are contemplated make it an optimal material, allowing it to be applied in liquid form and to solidify quickly. Furthermore, once the drying process is completed no pollutants are discharged to the environment.
- the method applied for producing the ballast object of the present invention consists of applying in liquid form the first polymer layer on the aggregate.
- This method can be carried out, as a non-limiting example, by means of spraying or pouring a polymer product on an aggregate which is spread on and conveyed by a flush grid conveyor belt, or by means of immersing said aggregate into a tank containing said polymer material, and it is then extracted and dispersed so that it can be dried in the crushed form, by means of a vibrating conveyor, for example.
- the granular elastomer material can be integrated to the aggregate by means of mixture thereof with the liquid polymer material before the application thereof on the aggregate, or according to a second embodiment, it can be adhered to the aggregate already impregnated with the polymer material but before drying same, for example by means of scattering or pouring the said elastomer material on the aggregate, this aggregate being spread on a flush grid conveyor belt or on a vibrating conveyor.
- Another possibility of application of the elastomer material is by means of immersion by means of vibration of the aggregate impregnated with the polymer material before drying same in a tank filled with said granular elastomer material.
- the polymer material can be of the type which solidifies in contact with moisture, or by evaporation of volatile fractions, or by heat drying, or as it reacts upon applying a second component, in this case the method described up until now would be followed by the application of this second component to trigger solidification.
- a second coating polymer layer has been envisaged to assure the complete adhesion of the elastomer material to the aggregate.
- This second layer can be applied in a way similar to the way the first layer is applied.
- This method of treating aggregate for producing the proposed ballast can be developed by means of a treatment plant having a small enough size so as to allow transport by road or by train to a location close to the location where the ballast must be installed. This possibility again reduces the production costs as transport of the raw materials is reduced.
- the proposed coating for aggregates 1 allows producing aggregates provided with protuberances. These protuberances, when putting a plurality of these aggregates 1 in a heap to form a ballast base for a railway track, generate a geometric interaction between these protuberances, greatly increasing the stability of the assembly ( Figure 5 ).
- Figure 1 shows an aggregate which has been coated with a first polymer layer 2 on which the granules of the elastomer material 3 have been adhered
- Figure 2 shows this same configuration but provided with a second polymer layer 4 strengthening the fixing of the elastomer material 3.
- Figure 3 shows an aggregate which has been coated with a first polymer layer 2 that had been previously mixed with the granules of the elastomer material 3 which have adhered to the aggregate 1 upon applying said first polymer layer 2.
- Figure 4 shows this same configuration but provided with a second polymer layer 4 strengthening the fixing of the elastomer material 3.
- the mentioned protuberances being of an elastomer material allows, in addition to a high stability, the ballast to have certain elastic properties and to be capable of absorbing vibrations without wearing out. This property results in greater durability, less frequent maintenance, a lower noise level as the train passes, and an increased safety.
- Said elastomer material 3 can be formed completely or partially by rubber originating from shredded tires, an economical material which constitutes increasing the value of waste.
- the production method used in the aggregates 1 shown in Figures 1 and 2 consists of, only by way of non-limiting example, conveying the aggregates 1 scattered on a conveyor belt on which there are arranged application means applying the first polymer layer 2 on the aggregates 1.
- Said impregnated aggregates 1 are then introduced in a tank containing said granular elastomer material 3.
- a plurality of granules is randomly adhered to the outer face of each aggregate 1 because the first polymer layer 2 has still not solidified.
- Said aggregates 1 are then extracted from said tank, and the first polymer layer 2 is then solidified.
- Said process will depend on the selected polymer, and may include steps of timed drying, heat drying, or application of a reactive component. This step can optionally be followed by the application and solidification of the second polymer layer 4.
- the production process can consist of, by way of non-limiting example, a step of mixing the granular elastomer material 3 with the polymer material, for then pouring the mixture on a flush grid conveyor belt conveying the aggregates 1, the first polymer layer 2 and the elastomer material 3, thereby being applied simultaneously to proceed to the solidification thereof and to the optional application of the second polymer layer 4.
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Structures (AREA)
- Railway Tracks (AREA)
- Crushing And Grinding (AREA)
- Pretreatment Of Seeds And Plants (AREA)
Description
- The present invention relates to a ballast with improved characteristics in terms of durability and resistance to fragmentation with respect to other rail track bed materials.
- The invention also relates to the method for producing said improved ballast. State of the Art
- The use of ballast as a rail track bed is widely known, but it has some drawbacks.
- First, the aggregate suitable for this use must meet required characteristics which are more exacting the higher the speed of the trains is or the higher the load that said trains transport, the sharpness of the edges of the aggregate being one of the essential characteristics, because said sharpness is what provides stability and prevents the ballast from flowing and causing track deformations with train vibrations. The difficulty in finding aggregates that meet all the characteristics required by sets of technical specifications makes them more expensive and leads to the need to move them over great distances, making them even more expensive.
- Another problem lies in the fact that vibrations to which the ballast is subjected due to the passage of trains cause the aggregates to become rounder over the years and to lose qualities, leading to the need of costly maintenance tasks or to the reduction in track performances.
- Furthermore, vehicles circulating at high speed often cause the aggregates to be lifted off the ballast and pelted against the undersides of the train, being able to cause malfunctions.
- Some products and methods for mitigating these drawbacks are known, such as for example, the invention described in patent document
WO2011131621A1 , where it anticipates the use of a ballast layer impregnated with a component which is subsequently sprayed with a second component producing a reaction, generating a protective polyurethane layer binding the ballast and prolonging its service life, but at the expense of complicating its maintenance or replacement, in addition to achieving an excessively monolithic result, greatly reducing the elasticity of the assembly. It must also be pointed out that the application of said chemical components in-situ can cause environmental contamination problems.WO 2013/120059 A1 further discloses a crushed ballast consisting of aggregates individually coated with a polymer layer that integrates a granular elastomer material. - Another known alternative is the use of a polymer as an individual coating for each aggregate, as described in the document entitled "Characterization of polyurethane coated railroad ballast behavior", presented in the 90th Annual Meeting of the Transportation Research Board, Washington, DC in January 2011. This solution prevents the contamination problems of the in-situ application of the ballast polymer coating, but the faces of the stones remain flat, without any relief that improves binding.
- Finally, the use of granular particles of an elastomer material is also known, such as for example, through patent document
DE102007053146A1 , describing the mixture of small particles of an elastomer material between the ballast to provide it with certain elasticity and to improve the adherence between the aggregates. The problem with this embodiment is that vibrations tend to stratify the components of the ballast, and said granules of the elastomer material can come out of the ballast very easily and contaminate the track surroundings. - The proposed invention relates to a crushed ballast with improved durability and resistance to fragmentation for rail infrastructures, consisting of aggregates with a particle size distribution selected from between 25 mm and 100 mm, individually coated with a first solidified polymer layer which integrates a granular elastomer material with granules having a size smaller than 4 mm, preferably having a size smaller than 2 mm.
- These granules of the elastomer material are fixed on the surface of the aggregates by means of the solidification of the polymer material and allow increasing in a remarkable manner the roughness of the aggregate as they confer protuberances to said aggregate. Said protuberances provide an improved binding of the aggregates with one another as a result of their increased roughness, due to the simple geometric interference of said protuberances and to the higher coefficient of friction of these materials compared to the aggregate, whereby the total resistance and durability of the ballast is increased, in addition to its overall stability against vibrations.
- Furthermore, by arranging elastomer granules between the aggregates, the vibrations can be absorbed by these granules, without causing the mentioned aggregates to wear out at all, such that the service life of the ballast is prolonged along with its elasticity, making it unnecessary to arrange elastomer parts between the ties and the ballast or between the tracks and the ties. A reduction in the noise level produced by the passage of trains as well as a reduction in the ballast-flying phenomenon as the train passes are also achieved. Furthermore, an aggregate treated accidentally pelted against the undersides of the train would cause less damage as it is coated with an elastomer material.
- According to the invention, it is proposed to arrange a second polymer layer over the aggregate provided with the elastomer material adhered with the first polymer layer, said second polymer layer providing a protective coating for protecting the elastomer material, and an increased fixing.
- This arrangement allows using aggregates which, before receiving the proposed coating, do not have the characteristics required for use thereof as a rail ballast, either because their edges are not sharp enough, or because of another reason. Old and worn-out ballasts, or aggregates discarded from a quarry, or recycled construction materials, or quarry ballasts that do not meet the strict requirements established by the standards for use thereof as a rail track ballast, for example by standard UNE EN 13450 2003, can therefore be used, for example. This and other similar standards greatly limit the type of aggregates that can be used, but the proposed coating increases the properties of the initial aggregate, whereby an aggregate which initially did not comply with said standard or another standard can be treated such that, after treatment, it indeed complies with said standard and can be used, thereby widening the range of stones which can be used as raw material, being able to use materials that are much more economical and easy to find than conventional aggregate. This also allows having closer supply sources and reducing logistics costs.
- The granular elastomer material can originate from the shredding of recycled material, such as for example, tires, which increases the value of highly polluting waste, and allows giving it a new use, in addition to taking advantage of its properties with a competitive cost.
- Optionally, the polymer material will be a material from the polyurethane family, since its elasticity and resistance properties, as well as its drying process and compatibility with other raw materials that are contemplated make it an optimal material, allowing it to be applied in liquid form and to solidify quickly. Furthermore, once the drying process is completed no pollutants are discharged to the environment.
- The method applied for producing the ballast object of the present invention consists of applying in liquid form the first polymer layer on the aggregate. This method can be carried out, as a non-limiting example, by means of spraying or pouring a polymer product on an aggregate which is spread on and conveyed by a flush grid conveyor belt, or by means of immersing said aggregate into a tank containing said polymer material, and it is then extracted and dispersed so that it can be dried in the crushed form, by means of a vibrating conveyor, for example.
- According to a first non-limiting embodiment, the granular elastomer material can be integrated to the aggregate by means of mixture thereof with the liquid polymer material before the application thereof on the aggregate, or according to a second embodiment, it can be adhered to the aggregate already impregnated with the polymer material but before drying same, for example by means of scattering or pouring the said elastomer material on the aggregate, this aggregate being spread on a flush grid conveyor belt or on a vibrating conveyor. Another possibility of application of the elastomer material is by means of immersion by means of vibration of the aggregate impregnated with the polymer material before drying same in a tank filled with said granular elastomer material.
- In a non-limiting illustrative manner, the polymer material can be of the type which solidifies in contact with moisture, or by evaporation of volatile fractions, or by heat drying, or as it reacts upon applying a second component, in this case the method described up until now would be followed by the application of this second component to trigger solidification.
- According to the invention, the inclusion of a second coating polymer layer has been envisaged to assure the complete adhesion of the elastomer material to the aggregate. This second layer can be applied in a way similar to the way the first layer is applied.
- This method of treating aggregate for producing the proposed ballast can be developed by means of a treatment plant having a small enough size so as to allow transport by road or by train to a location close to the location where the ballast must be installed. This possibility again reduces the production costs as transport of the raw materials is reduced.
- The foregoing and other advantages and features will be better understood based on the following detailed description of an embodiment which must be interpreted in an illustrative and non-limiting manner in reference to the attached drawings in which the sizes of the granules of the elastomer material as well as the thickness of the coatings have been expressly emphasized, in which:
-
Figure 1 shows a section of an aggregate on which a first polymer layer has been applied, a plurality of granules of the elastomer material were adhered to said first polymer layer before the solidification thereof; -
Figure 2 shows a section of the same aggregate shown inFigure 1 on which a second polymer layer has been applied to strengthen the fixing of the granules; -
Figure 3 shows a section of an aggregate on which a first polymer layer consisting of a mixture of said polymer product with the granules of the elastomer material has been applied, these granules being embedded in said first layer; -
Figure 4 shows a section of the same aggregate shown inFigure 3 on which a second polymer layer has been applied to strengthen the fixing of the granules; and -
Figure 5 shows a schematic view of the ballast formed by a plurality of the aggregates shown in any one of the first four figures, showing how the geometric interference of the granules of the elastomer material confers greater stability to the assembly. - As can be seen in the attached
Figures 1 to 4 , the proposed coating foraggregates 1 allows producing aggregates provided with protuberances. These protuberances, when putting a plurality of theseaggregates 1 in a heap to form a ballast base for a railway track, generate a geometric interaction between these protuberances, greatly increasing the stability of the assembly (Figure 5 ). -
Figure 1 shows an aggregate which has been coated with afirst polymer layer 2 on which the granules of theelastomer material 3 have been adhered,Figure 2 shows this same configuration but provided with asecond polymer layer 4 strengthening the fixing of theelastomer material 3. -
Figure 3 shows an aggregate which has been coated with afirst polymer layer 2 that had been previously mixed with the granules of theelastomer material 3 which have adhered to theaggregate 1 upon applying saidfirst polymer layer 2.Figure 4 shows this same configuration but provided with asecond polymer layer 4 strengthening the fixing of theelastomer material 3. These added protuberances thereby allow increasing the stability of the assembly, being able to use as raw material aggregates which would have been dismissed for use thereof as ballast, due to them not having sufficient binding properties and resistance, normally due to them not having sharp enough edges or being too rounded. This insufficiency is compensated for by the added protuberances. Furthermore, it allows greater irregularity of the particle size distribution of the ballast, since the cohesion of the assembly no longer depends on the correct interaction between the edges of the aggregates. This characteristic allows using as raw material for producing the proposed ballast more economical materials that are more easily accessible than the conventional materials, such as for example, old, worn-out recycled ballast, aggregates which have not passed the tests required for use thereof as ballast, construction rubbles, aggregates with a particle size distribution not acceptable for use thereof as conventional ballast, aggregates with rounded edges, etc. - The mentioned protuberances being of an elastomer material allows, in addition to a high stability, the ballast to have certain elastic properties and to be capable of absorbing vibrations without wearing out. This property results in greater durability, less frequent maintenance, a lower noise level as the train passes, and an increased safety.
- Said
elastomer material 3 can be formed completely or partially by rubber originating from shredded tires, an economical material which constitutes increasing the value of waste. - The production method used in the
aggregates 1 shown inFigures 1 and 2 consists of, only by way of non-limiting example, conveying theaggregates 1 scattered on a conveyor belt on which there are arranged application means applying thefirst polymer layer 2 on theaggregates 1. Said impregnatedaggregates 1 are then introduced in a tank containing saidgranular elastomer material 3. A plurality of granules is randomly adhered to the outer face of eachaggregate 1 because thefirst polymer layer 2 has still not solidified. Saidaggregates 1 are then extracted from said tank, and thefirst polymer layer 2 is then solidified. Said process will depend on the selected polymer, and may include steps of timed drying, heat drying, or application of a reactive component. This step can optionally be followed by the application and solidification of thesecond polymer layer 4. - In the case of the aggregates shown in
Figures 3 and 4 , the production process can consist of, by way of non-limiting example, a step of mixing thegranular elastomer material 3 with the polymer material, for then pouring the mixture on a flush grid conveyor belt conveying theaggregates 1, thefirst polymer layer 2 and theelastomer material 3, thereby being applied simultaneously to proceed to the solidification thereof and to the optional application of thesecond polymer layer 4.
Claims (13)
- A crushed ballast for rail infrastructures consisting of aggregates (1) with a particle size distribution selected from between 25 mm and 100 mm, individually coated with a first solidified polymer layer (2), wherein said first polymer layer (2) integrates a granular elastomer material (3); characterized in that a second solidified polymer layer (4) is arranged individually coating each aggregate (1) and the corresponding first polymer layer (2) integrating the mentioned granular elastomer material (3).
- The ballast according to claim 1, characterized in that the size of the granules of the elastomer material (3) is smaller than 4 mm.
- The ballast according to claim 1 or 2, characterized in that at least part of the aggregate (1) used is a recycled aggregate.
- The ballast according to claim 3, characterized in that at least part of the aggregate (1) used is an aggregate selected from the following: recycled worn-out ballast, construction rubbles, low-quality quarry ballast, or ballast with a particle size distribution less than 40 mm.
- The ballast according to any of claim 1 to 4, characterized in that at least one part of said granular elastomer material (3) is a recycled material originating from shredded tires.
- The ballast according to any one of the preceding claims, characterized in that at least one of said polymer layers (2, 4) is made from polyurethane.
- A method for producing a crushed ballast for rail infrastructures, the method providing an individual coating to aggregates (1) with a particle size distribution selected from between 25 mm and 100 mm with at least a first polymer layer (2) integrating a granular elastomer material (3),
characterized in that it comprises
a first step which comprises adding to an aggregate (1) a first polymer layer (2) in a solidifiable liquid form integrating an elastomer material: and a second step which comprises adding a second polymer layer (4) in a solidifiable liquid form onto said first polymer layer (2) and granular elastomer material (3). - The method according to claim 7, characterized in that said second polymer layer (4) is added after the solidification of the first polymer layer (2).
- The method according to any one of claims 7 to 8, characterized in that said granular elastomer material (3) is mixed with the liquid polymer material forming the first polymer layer (2) before application thereof on the aggregate (1).
- The method according to any one of claims 7 to 8, characterized in that said granular elastomer material (3) is added to said aggregate (1) after the application of the first liquid polymer layer (2) and before the solidification thereof.
- The method according to any one of claims 7 to 10, characterized in that an aggregate (1) at least partially recycled is used.
- The method according to any one of claims 7 to 11, characterized in that at least one part of said granular elastomer material (3) used is a recycled material originating from shredded tires.
- The method according to any one of claims 7 to 12, characterized in that the granules of the elastomer material (3) used have a size smaller than 4 mm.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL14856708T PL3061867T3 (en) | 2013-10-23 | 2014-10-23 | Ballast and method for producing same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES201331557A ES2536584B1 (en) | 2013-10-23 | 2013-10-23 | DISAGREGATED BASKET WITH IMPROVED DURABILITY AND FRAGMENT RESISTANCE AND PROCEDURE FOR OBTAINING THE SAME |
PCT/ES2014/070798 WO2015059335A1 (en) | 2013-10-23 | 2014-10-23 | Crushed ballast with improved durability and resistance to fragmentation and method for producing same |
Publications (3)
Publication Number | Publication Date |
---|---|
EP3061867A1 EP3061867A1 (en) | 2016-08-31 |
EP3061867A4 EP3061867A4 (en) | 2017-06-21 |
EP3061867B1 true EP3061867B1 (en) | 2019-06-12 |
Family
ID=52992315
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14856708.4A Active EP3061867B1 (en) | 2013-10-23 | 2014-10-23 | Ballast and method for producing same |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP3061867B1 (en) |
ES (2) | ES2536584B1 (en) |
MX (1) | MX2016005246A (en) |
PL (1) | PL3061867T3 (en) |
PT (1) | PT3061867T (en) |
WO (1) | WO2015059335A1 (en) |
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NL2015377B1 (en) * | 2015-08-31 | 2017-03-20 | Dura Vermeer Divisie Infra B V | PERS comprising coated particles. |
KR102307449B1 (en) * | 2019-04-11 | 2021-10-05 | 한국철도기술연구원 | High-functional gravel for ballast track |
DE102019206841A1 (en) * | 2019-05-10 | 2020-11-12 | Jörg Frenzel | Process for impregnation and further processing of bulk goods |
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DE102007053146A1 (en) | 2006-11-11 | 2008-05-15 | Wilfried Bonewitz | Railway track system comprises bed of mineral ballast with granule size of at least 2 mm, smallest particles consisting of rubber granules and sleepers resting on bed with flexible liner between them and rails |
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2013
- 2013-10-23 ES ES201331557A patent/ES2536584B1/en active Active
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2014
- 2014-10-23 PT PT14856708T patent/PT3061867T/en unknown
- 2014-10-23 ES ES14856708T patent/ES2739642T3/en active Active
- 2014-10-23 EP EP14856708.4A patent/EP3061867B1/en active Active
- 2014-10-23 MX MX2016005246A patent/MX2016005246A/en unknown
- 2014-10-23 WO PCT/ES2014/070798 patent/WO2015059335A1/en active Application Filing
- 2014-10-23 PL PL14856708T patent/PL3061867T3/en unknown
Non-Patent Citations (1)
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Also Published As
Publication number | Publication date |
---|---|
ES2536584B1 (en) | 2016-03-01 |
MX2016005246A (en) | 2016-10-28 |
PL3061867T3 (en) | 2019-12-31 |
WO2015059335A1 (en) | 2015-04-30 |
ES2536584A1 (en) | 2015-05-26 |
ES2739642T8 (en) | 2020-06-25 |
ES2739642T3 (en) | 2020-02-03 |
EP3061867A4 (en) | 2017-06-21 |
EP3061867A1 (en) | 2016-08-31 |
PT3061867T (en) | 2019-09-10 |
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