JPH11209759A - Grouting material for railway - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce a grouting material for railway having beautiful appearance and improved running safety and effective for suppressing the generation of mold with time and improving the maintenance efficiency of railway. SOLUTION: The grouting material of the present invention for railway is produced by adding a coloring material to a mixture containing cement, colored rubber chips, a rapid hardening mixture and a powdery additive. The material may be incorporated with a reflecting material and/or titanium oxide. The amount of the colored rubber chip is 10-80 pts.wt. based on 100 pts.wt. of the cement. The content of the rapid hardening mixture is 5-30 pts.wt. and that of the powdery additive is 2-5 pts.wt. The titanium oxide is preferably anatase type titanium dioxide having high activity. The reflection material is preferably glass bead (about 0.2-1 mm diameter) and its amount is 20-60 pts.wt. based on 100 pts.wt. of the grouting material for railway.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grout material having excellent strength and elasticity when hardened, good track maintenance efficiency, and excellent aesthetic appearance. is there.

[0002]

2. Description of the Related Art Conventionally, grout materials for tracks have been disclosed in
As disclosed in JP-A-69698 and JP-A-9-227194, it contains cement, rapid-hardening admixture, bituminous emulsion, polymer emulsion, fine aggregate, setting regulator, defoamer, foaming agent and the like. BACKGROUND ART Rapid hardening cement bitumen grout material for railways is known, and is used to construct a slab track by filling a ballast of a track track. In this rapid hardening cement bituminous grout material for railways, not only the bituminous emulsion and the polymer emulsion contribute to the development of elasticity of the cured product, but also impair the properties of this grout material in the material composition. And excellent workability can be obtained. On the other hand, as a grout material, a cement grout material is also known. As a grout material having excellent strength and elasticity, a grout material containing cement, a rubber chip, a fast-curing admixture, and a powder additive has been developed. And a patent application has been filed by the present applicant.

[0003]

Under these circumstances, the above-mentioned rapid hardening cement bituminous grout material for railways has good characteristics as a ballast material for railroad tracks, but originally, this grout was originally used. Since the material mainly contains bituminous emulsions, the surface has a brown to black-brown color, and the mortar surface injected becomes neutralized over time, and fine cracks are formed. Occurrence was observed, and the surface dirt advanced, causing a problem in aesthetic appearance.

In consideration of the necessity of displaying warnings and the like concerning safety during running on the track and also displaying a warning prompting the driver at night, various grout materials for tracks were examined. Using, as a grout material, a grout material containing no bituminous emulsion,
It has been found that the above-mentioned object is achieved by positively coloring the grout material, and the present invention has been made based on this finding.

[0005] Therefore, the first problem to be solved by the present invention is not only strength and elasticity, but also
An object of the present invention is to provide a grout material for a track which is preferable in aesthetic appearance and has improved running safety. A second problem to be solved by the present invention is to provide a track grout material which suppresses generation of moss due to aging, improves track maintenance efficiency, and has improved aesthetic durability. .

[0006]

The above objects of the present invention are achieved by the following inventions. That is,
The first object of the present invention is attained by a track grout material characterized by adding a coloring material to a mixture containing cement, colored rubber chips, a quick-setting admixture and a powder additive. Further, the first object of the present invention is achieved by a track grout material characterized in that the track grout material contains a reflecting material. Further, the second object of the present invention is achieved by a track grout material characterized in that each of the track grout materials contains titanium oxide.

[0007] The grouting material for tracks according to the present invention comprises cement,
By adding the coloring agent to the mixture containing the colored rubber chips, the quick-hardening admixture, and the powder additive, a slab track that is uniformly colored, is aesthetically preferable, and has improved running safety can be obtained. Further, in the present invention, by including a reflecting material in the orbital grout material, light is reflected at night,
The safety of night driving is achieved. Further, in the present invention, by adding titanium oxide to each of the track grout materials, generation of moss due to aging is suppressed, track maintenance efficiency is improved, and aesthetic durability is further improved. It is effective.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION In the grouting material for tracks according to the present invention, the composition of the mixture containing cement, colored rubber chips, quick-setting admixture and powder additives is 10 to 10 parts by weight of cement. When 80 parts by weight of a colored rubber chip is used, if it is less than the lower limit, the elasticity is poorly developed, and if it is more than the upper limit, the strength is deteriorated. In addition, the quick-setting admixture is used in an amount of 3 parts per 100 parts by weight of cement.
If the amount is less than the lower limit, a sufficient rapid hardening effect cannot be obtained, and if the amount exceeds the upper limit, a problem of premature curing occurs. Further, the powder additive is used in an amount of 1 to 10 parts by weight with respect to 100 parts by weight of cement. The preferred range of the composition of this mixture is that the content of the colored rubber chips is 10 to 80 parts by weight, the content of the quick-hardening admixture is 5 to 30 parts by weight, and the content of the powder additive is 2 to 5 parts by weight. Parts by weight.

The cement used in the present invention includes (1) ordinary Portland cement, early-strength Portland cement,
Portland cement such as ultra-high strength Portland cement, moderate heat Portland cement, sulfate resistant Portland cement, Belite cement, white Portland cement, etc., (2) blast furnace cement, fly ash cement,
Mixed cements such as silica cement and silica fume cement, (3) calcium aluminate-based special cement,
Special cements such as alumina cement and ultra-rapid hardening cement,
(4) Soil stabilizing cement and the like. The above (1)
The cements of (4) to (4) may be used alone or in combination.

[0010] The colored rubber chip used in the present invention comprises:
Having an average particle size of about 0.5 to 1 mm, and 1.1 to 1.2
Of specific gravity. This colored rubber chip may be colored by adding a coloring material to a raw material of natural or synthetic rubber,
For example, it can be made by pulverizing waste rubber. When a rubber chip is made by finely pulverizing waste rubber, the cured grout can be differentiated by the color of the waste rubber. For example, compared to the general place where grout of the present invention is injected,
When it is necessary to visually recognize the place where the grout of the present invention is specially injected, a rubber chip obtained by pulverizing waste rubber of different colors can be used in combination, and as colored waste rubber, white, red, green, A colored rubber chip obtained by finely pulverizing waste rubber having a high lightness or saturation such as brown can be used.

As the quick-hardening admixture used in the present invention, various types can be used. Preferably, 10 to 30 parts by weight of type II anhydrous gypsum and 20 to 70 parts by weight of Portland cement or mixed cement and 20 to 70 parts by weight of steelmaking slag are used. 50 parts by weight and 0.5 to 5 parts by weight of a setting retarder with respect to the total weight of these components were added and pulverized until the specific surface area became 3500 cm ² / g (Japanese Patent Application Laid-Open No. 62-260749). The rapid hardening cement described) and the setting retarder are not particularly limited, but preferably include ligninsulfonic acid, gluconate and the like. 100 to 100 parts by weight of Portland cement or mixed cement, 10 to 70 parts by weight of stainless steel slag, 4 to 40 parts by weight of type II anhydrous gypsum, lactic acid, citric acid, tartaric acid And 0.5 to 5 parts by weight of a setting retarder comprising an organic setting retarder such as sodium carbonate and an alkali carbonate such as sodium carbonate, and then pulverizing the mixture (described in JP-A-6-321607). Or a commercially available calcium aluminate-based quick-setting material.

Further, the powder additive of the present invention includes a quick-setting agent, a defoaming agent and a water reducing agent. If the grout material contains these powder additives, cement 100
1 to 10 parts by weight of the quick setting agent, 0.01 to 2 parts by weight of the defoamer, and 0.001 to 1 part by weight of the water reducing agent are contained in parts by weight. If the amount is less than the lower limit, the desired performance will not be exhibited. If the amount exceeds the upper limit, curing retardation will be caused in the case of the quick-hardening modifier, and the effect will be small and the economy will be poor if the defoaming agent is used. When the amount of the water reducing agent exceeds the upper limit value, the fluidity becomes excessive and the material may be separated.

Examples of the quick setting agent used in the present invention include alkali carbonate and oxycarboxylic acid, or a combination of alkali carbonate and oxycarboxylate. Examples of the alkali carbonate include sodium carbonate and potassium carbonate, examples of the oxycarboxylic acid include tartaric acid, citric acid, malic acid, and gluconic acid, and examples of the oxycarboxylate include the sodium salt and the calcium salt thereof. In addition, the above-mentioned grout material for tracks is used for tracks,
Needless to say, it is excellent in strength development and elasticity development and has good workability.

The present invention is characterized in that a coloring agent is added to the above-mentioned mixture of grout materials, and as this coloring agent, an inorganic pigment is preferable, and Fe ₂ O
₃ (red, orange), Fe ₂ O ₃ .H ₂ O (yellow), Cr ₂ O ₃
(Green), carbon black (black), TiO ₂ (white) and the like. The amount of the coloring material to be added is 1 to 5% by weight, and preferably 3 to 5% by weight in consideration of coloring properties. Further, as the reflector used in the present invention,
Glass beads (about 0.2 mm to 1 mm in diameter) are preferred. The glass beads are used for the grout material 100 for the track.
20 to 60 parts by weight, preferably 30 to 60 parts by weight,
50 parts by weight may be added and then injected into the track ballast. Alternatively, the grout material for the track may be injected into the track ballast and then applied by spraying 200 g to 2000 g per 1 m ² . When the addition amount or the application amount range is less than the lower limit value, the reflection efficiency is poor, and when it exceeds the upper limit value, the properties of the grout material are adversely affected and it is not economical.

Further, in the present invention, titanium oxide is added to the grout material for rails.
It absorbs ultraviolet rays to cause a photocatalytic reaction, and the resulting strong oxidizing power decomposes organic matter such as moss to suppress the generation of moss and reduce the number of track maintenance, and titanium oxide is particularly limited Although it is not required, it may be composed of titanium dioxide and have any crystal form of rutile and anatase, but anatase-type titanium dioxide having high activity is preferable. Further, these titanium dioxides contain titanium dioxide as a main component, and may further contain a small amount of titanium oxide.

In the present invention, the amount of titanium oxide added is
It is 1 part by weight to 50 parts by weight with respect to 100 parts by weight of the mixture, however, in view of the economical efficiency of this titanium oxide, it is preferably 1 part by weight to 20 parts by weight, more preferably 1 to 5 parts by weight.
When the added amount of the titanium oxide is less than 1 part by weight with respect to 100 parts by weight of the mixture, moss is generated, and sufficient moss suppression is poor. If it exceeds 50 parts by weight, it is economically disadvantageous. In addition, after the orbit ballast is filled with a grout material containing no titanium oxide, the grout material containing titanium oxide may be provided with a grout material containing titanium oxide, which is more economically preferable. In addition to the track grout material of the present invention, various other additives usually used in this technical field can be added, and examples thereof include fine aggregates, AE agents, and foaming agents.

[0017]

EXAMPLES The present invention will be described below in more detail with reference to examples, but the present invention is not limited to these examples.

[Example 1] Ordinary Portland cement 1
With respect to 00 parts by weight, 50 parts by weight of a yellow colored rubber chip (particle size: 0.25 to 1.19 mm) and 25 parts by weight of the above-mentioned fine powder mixture as a quick-hardening admixture were collected and put into a mixer. Was. Next, 1.8 parts by weight of a mixture of tartaric acid and sodium carbonate and 0.001 part by weight of a powder antifoaming agent (nonionic type) were collected as a quick-hardening agent, and placed in the mixer to obtain Fe ₂ O ₃ .H _2. O3 parts by weight and finally 65 parts by weight of water were put into the mixer. This mixer was driven to mix the grout material uniformly to prepare a track grout material.

The track grout material was filled in a ballast of a track track and applied to a curved portion to form a portion having a different color. As a result, while traveling on the curve of the track, attention was directed to the front, and the vehicle could travel safely.

Example 2 The slab track was formed by filling the track grout material manufactured in Example 1 into the ballast of the track. On this surface, 300 g of glass beads (diameter 0.3 mm) were sprayed per 1 m ² . When the obtained track was run at night, the track appeared to be reflected by lights, and safety at night was improved.

Example 3 Titanium oxide for photocatalyst (anatase type, specific surface area 170 m ² / g) was added to the orbital grout material produced in Example 1 in an amount shown in Table 1, and mixed well. A test specimen of 10 × 10 × 1 mm (thickness) was formed. The obtained specimen was exposed outdoors for 6 months. Table 2 shows the obtained results.

[0022]

[Table 1] As is clear from Table 1, in the present invention, moss was not generated on the surface by adding titanium oxide, whereas moss was generated on the surface and cracks in the case where conventional titanium oxide was not added. Admitted.

[0023]

The grouting material for tracks according to the present invention is uniformly colored by adding a coloring material to a mixture containing cement, colored rubber chips, a quick-hardening admixture and powder additives, and is preferably aesthetically pleasing. Thus, a slab track with improved running safety can be obtained. Further, in the present invention, by including a reflecting material in the track grout material, light is reflected at night, and safety at night driving is achieved. Furthermore, in the present invention,
By including titanium oxide in the grout material for each track, the generation of moss due to aging is suppressed, the track maintenance efficiency is improved, and the aesthetic durability is improved. is there.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI // (C04B 28/02 14:02 22:04 24:04 22:14) C09K 103: 00

Claims (3)

[Claims] 1. A grouting material for a track, wherein a coloring material is added to a mixture containing cement, colored rubber chips, a quick-setting admixture and a powder additive. 2. The track grout according to claim 1, further comprising a reflector. 3. The grouting material for a track according to claim 1, wherein the grouting material contains titanium oxide.