KR20140001647A - Method for constructing paving-track for railroad - Google Patents

Method for constructing paving-track for railroad Download PDF

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Publication number
KR20140001647A
KR20140001647A KR1020120069867A KR20120069867A KR20140001647A KR 20140001647 A KR20140001647 A KR 20140001647A KR 1020120069867 A KR1020120069867 A KR 1020120069867A KR 20120069867 A KR20120069867 A KR 20120069867A KR 20140001647 A KR20140001647 A KR 20140001647A
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South Korea
Prior art keywords
asphalt
temperature
present
track
concrete structure
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KR1020120069867A
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Korean (ko)
Inventor
김영진
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한국건설기술연구원
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Priority to KR1020120069867A priority Critical patent/KR20140001647A/en
Publication of KR20140001647A publication Critical patent/KR20140001647A/en

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    • 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
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B2/00—General structure of permanent way
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/07—Reinforcing elements of material other than metal, e.g. of glass, of plastics, or not exclusively made of metal
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B2204/00—Characteristics of the track and its foundations
    • E01B2204/03—Injecting, mixing or spraying additives into or onto ballast or underground

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Structures (AREA)

Abstract

According to the present invention, after a vinyl material is crushed into the predetermined size and is mixed in an asphalt binder in the predetermined weight rate, an asphalt concrete structure under a paved track for railroad is formed by heating the mixed mixture at a temperature of 160 to 170°C. According to the present invention, the asphalt concrete structure (300) under a paved track for railroad lowers the sensitivity to temperature of an asphalt binder itself and improves the viscosity of the asphalt binder. The present invention can reduce the damage that a work is burned at the time of the construction of asphalt mixture and can reduce the plastic settlement due to the sudden increase of temperature in the summer time by improving the sensitivity to temperature of the asphalt itself. The prevent invention can prevent the asphalt from being suddenly contracted and damaged due to the cold atmospheric temperature in the winter time, and can extend the service life and durability of the pavement by improving the viscosity of asphalt and coupling the asphalt binder to aggregate, such as rubble. [Reference numerals] (100) Subgrade; (200) Graded crushed stone; (AA) Ballast (for noise reduction and asphalt protection); (BB) Tie for a special section; (CC) Protrusion for horizontal resistance; (DD) CA mortar; (EE) Asphalt road-bed

Description

Pavement track construction method for railway {METHOD FOR CONSTRUCTING PAVING-TRACK FOR RAILROAD}

The present invention relates to a railway gravel track, and more particularly to a asphalt concrete structure of the railway gravel track.

In general, most railway tracks consist of gravel tracks, which require a lot of manpower and money for maintenance due to high speed, high density, and deterioration of track components, which is constantly increasing. Recent railway technology is being researched to reduce the effort of maintenance by improving the track structure and improving the repair method through the railway ballast gravel track vitalization work.

In some countries with advanced railway technologies, such as Japan and Germany, studies have been attempted to improve the noise reduction and ride comfort when passing asphalt trains by laying asphalt concrete (hereinafter referred to as `` ascon '') under the railway gravel tracks. .

The track not only serves to guide trains on the road, but also protects the undercarriage by relieving the load on the train, which is transferred to the ground. In addition, the running stability and ride comfort of the train are directly affected by the track performance, and a large part of the noise and vibration are generated by the track and the train interaction.

In addition, the ballast is located at the bottom of the track and distributes the load transmitted through the rails and the large sleepers to the ground, and transfers the movement of the large sleepers that may appear as rail stretching due to temperature changes. It is prevented by its resistance and absorbs the vibration of the train to improve the ride quality, and also plays various roles such as facilitating rainwater drainage and preventing weeds from growing.

In order to improve the speed of the train and to reduce noise and vibration, various tracks have been recently developed and gradually replaced. However, since the share of the traditional donor track is still high, the maintenance and repair for extending its lifespan Research and development on replacement is ongoing. In order to maximize the longevity and work effect of the traditional donor track, the repair equipments such as MTT (Multiple Tie Tamper), DTS (Dynamic Track Stabilizer) and Rail Grinding Car have been put into the actual field and have many effects.

However, the conventional gravel track has a problem of increasing the cost of maintenance and repair due to the increase in the amount of torsion of the track due to the high speed, weight, and densification of the train, causing problems in train operation.

In particular, the construction procedure of the conventional road renovation work consists of the removal of old tracks, the installation of new sleepers, the installation of formwork, jackie and temporary support, the placing of concrete, and the curing of the slab tracks. Therefore, there are problems such as a lot of construction time, construction cost is also increased, the situation is necessary to take measures against this.

The construction method of such an asphalt-based pavement track has been disclosed in Korean Patent Registration No. 10-0709099 (hereinafter, referred to as a reference document).

As for the construction of asphalt-based pavement track according to the prior art, by using an asphalt-based composite filling material, the elastic modulus of the intermediate range of cement and asphalt is imparted to reduce the brittle fracture of the member and to recover the repetitive load. It has the advantage of improving, but the problem of plastic settlement due to the rapid temperature rise of asphalt in summer, the problem that the asphalt shrinks and breaks under the influence of cold atmospheric temperature in winter, the aggregates such as asphalt binder and crushed stone are not well connected, There were still challenges to be solved, such as the problem of material separation when repeatedly passing over this asphalt pavement.

Korea Patent Registration 10-0709099 (Name of the invention: construction method and structure of asphalt-based pavement track)

The present invention has been made to solve the above problems, and provides a rail track construction method for mixing vinyl (Linear Low Density Polyethylene) (LLDPE) in the asphalt binder to improve the performance of ascone installed on the gravel track bottom. The purpose of the invention is to.

In order to achieve the above object, the asphalt concrete structure of the lower track pavement according to the present invention is shredded vinyl material to a predetermined size and mixed in a predetermined weight ratio in the asphalt binder, the mixed mixture of 160 ~ 170 degrees It is molded by heating to temperature.

Preferably, the vinyl material is characterized in that the linear low density polyethylene (LLDPE).

Preferably, the vinyl material is crushed to a size of 0.1 ~ 0.5 centimeters.

Preferably, the vinyl material is mixed with the asphalt binder in a weight ratio of 1.5% to 6%.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the present invention will be realized and attained by the structure particularly pointed out in the claims, as well as the following description and the annexed drawings.

The asphalt concrete structure 300 under the gravel track for railways according to the present invention lowers the temperature sensitivity and improves the viscosity of the asphalt binder itself. The present invention is to reduce the damage caused by workers during the construction of asphalt mixture by improving the temperature sensitivity of the asphalt itself, and to reduce the plastic settlement due to the rapid temperature rise of asphalt in the summer.

In addition, in winter, the asphalt is prevented from rapidly contracting and breaking under the influence of cold air temperature, and the asphalt binder is combined with aggregate such as crushed stone to improve the viscosity of the asphalt to have the effect of extending the life of the package and increasing durability.

1 is an exemplary view of a railway pavement track according to the present invention.
Figure 2 a) is a photograph showing the flash point experiment of the vinyl mixed asphalt binder according to the present invention.
Figure 2 b) is a graph showing the flash point test results of the vinyl mixed asphalt binder according to the present invention.
Figure 3 a) is a photograph showing a softening point experiment of the vinyl mixed asphalt according to the present invention.
Figure 3 b) is a graph showing the softening point test results of the vinyl mixed asphalt according to the present invention.
Figure 4 a) is a photograph showing the penetration test of the vinyl mixed asphalt binder according to the present invention.
Figure 4 b) is a graph showing the penetration test results of the vinyl mixed asphalt binder according to the present invention.

An object of the present invention is to implement a method for constructing an asphalt concrete structure under a gravel track for railway, which is formed by mixing waste vinyl material in a predetermined ratio in an asphalt binder.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

1 is an exemplary view of a railroad pavement track according to the present invention.

As shown in FIG. 1, the present invention relates to a method of constructing an asphalt concrete structure under a railway gravel track. After digging an existing phase, the subsurface layer 100 is laid and on the subsurface layer 100. Laying the particle size adjustment stone 200 and put the asphalt concrete structure 300 according to the present invention on the top so that the asphalt roadbed layer is formed.

Then, filling the donor galle for noise reduction and asphalt protection thereon and placing a sleeper 400 and a variable fastener (not shown) on the donor galle, using the variable fastener (not shown) to track the track 500. Coupling perpendicular to the sleeper 400, fill the new donor through the space between the sleepers 400, and adjust the position of the track 500.

Here, the asphalt concrete structure 300 under the gravel track for railways according to the present invention, the asphalt by crushing the vinyl material (for example, linear low density polyethylene (LLDPE: Linear Low Density Polyethylene)) to the size of 0.1 ~ 0.5 cm After mixing the binder in a weight ratio of 1.5% to 6%, the mixed mixture is formed by heating to a temperature of 160 to 170 degrees.

The present invention is to shred waste vinyl (for example, linear low density polyethylene (LLDPE) to the size of 0.1 ~ 0.5 cm) in order to improve the performance of the asphalt concrete structure installed under the gravel track After mixing at a weight ratio of 1.5% or 3% or 5%, the mixed mixture is melted at 160 to 170 ° C. to lower the thermosensitivity of the asphalt binder itself and to improve the viscosity. By improving the thermal sensitivity of the asphalt itself, it is possible to reduce the risk of workers getting burned during the construction of the asphalt mixture.

In addition, it reduces the plastic settlement caused by the rapid temperature rise of the asphalt in the summer and prevents the asphalt from shrinking and breaking rapidly under the influence of the cold atmospheric temperature.

In addition, the viscosity of the asphalt is improved, so that the asphalt binder binds well with aggregates such as crushed stone, and once combined, material separation does not occur even if the vehicle repeatedly passes over the asphalt pavement, thereby extending the life of the pavement and increasing durability. Exert.

Figure 2 a) is a photograph showing the flash point experiment of the vinyl mixed asphalt binder according to the present invention, Figure 2) b) is a graph showing the flash point test results of the vinyl mixed asphalt binder according to the present invention.

As shown in b) of FIG. 2, the flash point of the vinyl mixed asphalt binder according to the present invention is about 340 ° C when the mixing ratio of the vinyl material is 1.5% (weight ratio), and is about 346 ° C when 3% (weight ratio). And 6% (weight ratio). It can be seen that as the mixing ratio of the vinyl material increases, the flash point of the vinyl mixed asphalt binder also gradually increases.

Figure 3 a) is a photograph showing a softening point experiment of the vinyl mixed asphalt according to the present invention, Figure 3 b) is a graph showing the softening point test results of the vinyl mixed asphalt according to the present invention.

As shown in b) of Figure 3, the softening point of the vinyl mixed asphalt according to the present invention is about 49 ℃ when the mixing ratio of the vinyl material is 1.5% (weight ratio), about 54 ℃ when 3% (weight ratio), It is about 62 ° C. at 6% (weight ratio). As the mixing ratio of the vinyl material increases, the softening point of the vinyl mixed asphalt gradually increases.

Figure 4 a) is a photograph showing the penetration test of the vinyl mixed asphalt binder according to the present invention, Figure 4 b) is a graph showing the penetration test results of the vinyl mixed asphalt binder according to the present invention.

As shown in FIG. 4 b), the penetration of the vinyl mixed asphalt binder according to the present invention is approximately 4.9 mm when the mixing ratio of the vinyl material is 1.5% (weight ratio) and about 4 mm when 3% (weight ratio). 6 mm (weight ratio). It can be seen that as the mixing ratio of the vinyl material increases, the penetration of the vinyl mixed asphalt binder also gradually decreases.

Table 1 below is a PG test result table for a pure asphalt binder not mixed with a vinyl material.

Test Items Test result Remarks One asphalt Flash point (℃) 343 230 or more Viscosity (Pa? S) 135 ℃ 0.408 3 or less Dynamic shear
G * / sin?
(kPa) 64 ° C 1.913 1.0 or higher,
(10rad / s) 70 ℃ 1.002 76 ℃ - 82 ° C - Residuals after rolling thin film oven (KS M 2259) Mass loss (%) 0.44 1.0 or less Dynamic shear
G * / sin?
(kPa) 64 ° C 3.782 2.2 and above,
(10rad / s) 70 ℃ 2.066 76 ℃ - 82 ° C - Pressure Aging Vessel (PAV, KS F 2391) Pressure aging temperature (℃) 100 Dynamic shear
G * sinδ
(kPa) 22 ℃ - 5,000 or less
(10rad / s) 25 ℃ 2,222 28 ℃ 1,388 31 ℃ 880 Bending creep stiffness
S (MPa) -12 ℃ 171 300 or less
(60s) -18 ° C 284 Bending creep stiffness
m value -12 ℃ 0.350 0.3 or more
(60s) -18 ° C 0.299 PG rating PG  64-22

Table 2 is a PG test result table when the mixing ratio of the vinyl material is 3% by weight.

Test Items Test result Remarks One asphalt Flash point (℃) 346 230 or more Viscosity (Pa? S) 135 ℃ Check 3 or less Dynamic shear
G * / sin?
(kPa) 70 ℃ 1.860 1.0 or higher,
(10rad / s) 76 ℃ 0.9797 82 ° C 0.5524 88 ℃ 0.3366 Residuals after rolling thin film oven (KS M 2259) Mass loss (%) 0.25 1.0 or less Dynamic shear
G * / sin?
(kPa) 64 ° C 7.281 2.2 and above,
(10rad / s) 70 ℃ 3.564 76 ℃ 1.821 Pressure Aging Vessel (PAV, KS F 2391) Pressure aging temperature (℃) 100 Dynamic shear
G * sinδ
(kPa) 25 ℃ 6979 5,000 or less
(10rad / s) 28 ℃ 4858 31 ℃ 3340 34 ℃ 2266.5 Bending creep stiffness
S (MPa) -12 ℃ 190.926 300 or less
(60s) -18 ° C 407.427 Bending creep stiffness
m value -12 ℃ 0.366 0.3 or more
(60s) -18 ° C 0.286 PG rating PG  70-22

As can be seen from the above [Table 1] and [Table 2], it can be seen that the PG test value was improved when the mixing ratio of the vinyl material was 3% by weight compared to the PG test value for the pure asphalt binder without mixing the vinyl material. have.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. May be constructed by selectively or in combination. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

As described above, the asphalt concrete structure 300 under the gravel track for railways according to the present invention has lowered the temperature sensitivity of the asphalt binder itself and improved the viscosity. The present invention is to reduce the damage caused by workers during the construction of asphalt mixture by improving the temperature sensitivity of the asphalt itself, and to reduce the plastic settlement due to the rapid temperature rise of asphalt in the summer.

In addition, in winter, the asphalt is prevented from rapidly contracting and breaking under the influence of cold air temperature, and the asphalt binder is combined with aggregate such as crushed stone to improve the viscosity of the asphalt to have the effect of extending the life of the package and increasing durability.

100: hearth 200: particle size adjustment stone
300: asphalt concrete structure 400: sleepers
500: orbit

Claims (4)

In the asphalt concrete structure under the gravel track for railway,
After shredding the vinyl material to a predetermined size and mixing the asphalt binder in a predetermined weight ratio, the asphalt concrete structure, characterized in that the mixed mixture is formed by heating to a temperature of 160 ~ 170 degrees. The method of claim 1, wherein the vinyl material
Asphalt concrete structure, characterized in that the linear low density polyethylene (LLDPE). The method of claim 1, wherein the vinyl material
Asphalt concrete structure, characterized in that crushed to the size of 0.1 ~ 0.5 centimeters. The method of claim 1, wherein the vinyl material
Asphalt concrete structure, characterized in that mixed with the asphalt binder in a weight ratio of 1.5% ~ 6%.
KR1020120069867A 2012-06-28 2012-06-28 Method for constructing paving-track for railroad KR20140001647A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104195890A (en) * 2014-08-13 2014-12-10 刘义安 Railway solidified and closed ballast bed and solidification and closing method
KR101669109B1 (en) 2015-05-12 2016-10-27 한국철도기술연구원 Asphalt pavement structure for railroad track, and construction method for the same
CN111270564A (en) * 2020-01-21 2020-06-12 中国铁道科学研究院集团有限公司铁道建筑研究所 Preparation method of graded broken stone for surface layer of high-speed railway foundation bed and graded broken stone

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104195890A (en) * 2014-08-13 2014-12-10 刘义安 Railway solidified and closed ballast bed and solidification and closing method
CN104195890B (en) * 2014-08-13 2015-12-09 刘义安 A kind of railway solidification is closed railway roadbed and solidifies the method closed
KR101669109B1 (en) 2015-05-12 2016-10-27 한국철도기술연구원 Asphalt pavement structure for railroad track, and construction method for the same
CN111270564A (en) * 2020-01-21 2020-06-12 中国铁道科学研究院集团有限公司铁道建筑研究所 Preparation method of graded broken stone for surface layer of high-speed railway foundation bed and graded broken stone

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