Insulated concrete sleeper and method for manufacturing same

Abstract

The application discloses an insulating concrete sleeper and a preparation method thereof, and the insulating concrete sleeper comprises the following raw materials in parts by weight: special cement 10-30 parts; sand 20-40 parts; stone 35-55 parts; drinking water 3-10 parts; water reducing agent 0.1-3 parts; cellulose ether 0-1 part; insulating modifier 0.01-10 parts; defoaming agent 0-5 parts; retarder 0-5 parts; and reinforcing rib 0.3-10 parts. The application has good insulation and can meet the insulation requirement of the concrete sleeper under long-term immersion.

Description

Technical Field

[0001] This invention belongs to the field of railway sleeper technology, specifically relating to an insulated concrete sleeper and its preparation method. Background Technology

[0002] Concrete sleepers are typically made by embedding steel bars in ordinary silicate concrete. They are an indispensable component of railway lines. However, railway accidents occasionally occur, mainly due to the following reasons: 1) Traditional silicate concrete itself has low insulation properties. Therefore, concrete sleepers made from it usually rely on the resistance generated by anchoring materials to improve their insulation performance. However, there are many types of anchoring materials on the market, with varying insulation performance. Even high-quality anchoring materials will experience a significant decrease in insulation performance during long-term immersion in water, leading to vehicle bumps, unstable vehicle operation, and ultimately, traffic safety issues; 2) Ordinary silicate concrete sleepers have poor high-temperature resistance and corrosion resistance. If a fire occurs in a forest area, ordinary concrete sleepers may crack due to the high temperature. If exposed to a corrosive environment for a long time, ordinary concrete sleepers will be slowly eroded by the rusting of the steel bars, resulting in cracks. This not only reduces the load-bearing capacity of the sleepers but also lowers their insulation, leading to serious traffic safety problems.

[0003] Therefore, solving the problems of insulation, high temperature resistance, and corrosion resistance of concrete sleepers plays a crucial role in reducing railway transportation accidents and improving passenger comfort. Summary of the Invention

[0004] The purpose of this invention is to overcome the defects in the prior art and provide an insulated concrete sleeper and its preparation method, which has good insulation properties and can meet the insulation requirements of concrete sleepers under long-term water immersion.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] An insulated concrete railway sleeper comprises the following raw materials in parts by weight:

[0007]

[0008]

[0009] As a further technical solution, the special cement is high-alumina cement or aluminate special cement, and the aluminate special cement includes one or two of sulfoaluminate cement and ferroaluminate cement.

[0010] As a further technical solution, the sand is one or more of the following: river sand, mountain crushed sand, stone crushed sand, manufactured sand, and quartz sand;

[0011] As a further technical solution, the stones are one or more of the following: river pebbles, mountain gravel, tailings, barite, and dolomite.

[0012] As a further technical solution, the water-reducing agent is one or more of the following: acrylic acid, maleic anhydride, methacrylic acid, hydroxyethyl acrylate, naphthalene sulfonate formaldehyde condensate, and potassium naphthalene sulfonate condensate.

[0013] As a further technical solution, the cellulose ether is one or more of methylcellulose ether, hydroxypropyl methylcellulose ether, hydroxyethyl methylcellulose ether, hydroxyethyl cellulose ether, and hydroxyethyl ethyl cellulose ether.

[0014] As a further technical solution, the defoamer is one or more of organosilicon, polyether, fatty acid, and phosphate ester;

[0015] As a further technical solution, the retarder is one or more of the following: phosphate, borax, hydroxy acids and their salts, polyhydroxy compounds, and polyols.

[0016] As a further technical solution, the insulating modifier is one or more of the following: metal borate insulating modifier with a valence greater than or equal to 2, metal oxide insulating modifier with a valence greater than or equal to 2, and amino acid insulating modifier.

[0017] As a further technical solution, the metal borate insulating modifier with a price greater than or equal to 2 is selected from one or more of iron borate, manganese borate, magnesium borate, and barium borate;

[0018] As a further technical solution, the metal oxide insulating modifier with a price greater than or equal to 2 is selected from one or more of aluminum oxide, boron oxide, lead oxide, tin oxide, calcium oxide, nickel oxide, and chromium oxide.

[0019] As a further technical solution, the amino acid insulating modifier is selected from one or more of cysteine, methionine, asparagine, glutamine, tyrosine, glutamic acid, and aspartic acid.

[0020] As a further technical solution, the composite material reinforcing rib is made by curing fiber and resin composite material through an extrusion process.

[0021] As a further technical solution, after weighing the above-mentioned raw materials according to the weight proportions, the resin is heated to melt, and the fibers that have been stretched in the mold are wrapped in it. After the whole solidification is completed, the material is demolded and trimmed to obtain the composite material reinforcing rib.

[0022] As a further technical solution, the fiber and resin composite material is prepared by mixing and compounding 65-75 wt% fiber and 25-35 wt% resin (preferably 70 wt% fiber and 30 wt% resin); wherein the total amount of fiber and resin in the fiber and resin composite material is 100%.

[0023] As a further technical solution, the fiber is one or more of glass fiber, carbon fiber, basalt fiber, aramid fiber, and ceramic fiber.

[0024] The resin is one or more of unsaturated polyester resin, epoxy resin, phenolic resin, vinyl resin, and polyurethane resin.

[0025] A method for preparing an insulated concrete railway sleeper includes the following steps:

[0026] Step 1: Weigh each raw material by weight, mix the special cement, sand, and gravel evenly, then add the water-reducing agent, cellulose ether, insulation modifier, defoamer, and retarder, mix thoroughly, and finally add drinking water and mix evenly to obtain concrete material.

[0027] Step 2: Place the composite material reinforcing ribs into the sleeper mold;

[0028] Step 3: The prepared concrete material is fed into the concrete placing machine through the mixer and evenly distributed into the sleeper mold. It is then vibrated and allowed to stand for 1-2 hours before being steam cured. Finally, it is demolded.

[0029] The steam curing temperature is 50-70℃ (preferably 55±5℃), the steam curing time is 8-10h (preferably 8±0.5h), the heating rate before steam curing is 15℃ / h, and the cooling rate after steam curing is 15℃ / h.

[0030] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0031] 1. This invention uses metal borates with a valence of 2 or higher, metal oxides with a valence of 2 or higher, and / or amino acids as insulating modifiers. Compared with traditional resin modifiers, these modifiers have the advantages of requiring less dosage and providing better insulation performance.

[0032] 2. High-alumina cement and aluminate special cement cannot improve the insulation of concrete sleepers on their own. However, when high-alumina cement or aluminate special cement is used to replace ordinary silicate cement in the preparation of concrete sleepers, it can be compounded with the three insulating modifiers of metal borates, metal oxides and / or amino acids as defined in this invention, which can greatly improve the insulation of concrete sleepers, especially the insulation under long-term water immersion.

[0033] 3. This invention incorporates fiber materials into resin and prepares composite material reinforcing ribs through pultrusion molding and curing. While ensuring the mechanical strength of the composite material reinforcing ribs, it also features light weight, easy transportation, good insulation, good ductility, resistance to acid and alkali corrosion, resistance to aging, and long service life. It can be used in concrete sleepers, support blocks, and prestressed concrete components for tunnels and submarine prestressed concrete components where corrosion resistance is required. Compared to traditional steel bars, this invention uses composite material reinforcing ribs in the preparation of concrete sleepers, ensuring that the mechanical strength of the concrete sleepers is not reduced and further improving their insulation.

[0034] In summary, this invention combines high-alumina cement or aluminate special cement with a metal borate insulating modifier with a price greater than or equal to 2, a metal oxide insulating modifier with a price greater than or equal to 2, or an amino acid insulating modifier, and uses composite material reinforcing ribs, which can greatly improve the insulation of insulated concrete sleepers. Compared with traditional concrete sleepers, it not only has good insulation after 24 hours of immersion, but also has excellent insulation after 48 hours of immersion. Detailed Implementation

[0035] The technical solution of the present invention will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] In this invention,

[0037] High-alumina cement: Strength grade 62.5, Zhengzhou New Special Cement Plant;

[0038] Sulfoaluminate cement: Strength grade 72.5, Tangshan Polar Bear Building Materials Co., Ltd.;

[0039] Ferroaluminate cement: Type: CA-60, Zhengzhou Kanghui Refractory Co., Ltd.;

[0040] Ordinary Portland cement: Strength grade: P·O 42.5, Hebei Jinyu Dingxin Cement Co., Ltd.;

[0041] Special barium cement: Strength grade: 42.5, Shandong Kangbert Radiation Protection Engineering Co., Ltd.

[0042] Unless otherwise specified, all raw materials used in this invention are commercially available.

[0043] Example 1

[0044] An insulated concrete sleeper, characterized in that it comprises an insulated concrete sleeper body and composite material reinforcing ribs embedded within the concrete sleeper body, wherein the insulated concrete sleeper body comprises the following raw materials by weight:

[0045] Sulfoaluminate cement: 150 kg;

[0046] Sand: 250 kg of river sand;

[0047] Stones: 360 kg of mountain gravel;

[0048] Drinking water: 40 kg;

[0049] Water-reducing agent: 1.5 kg of polycarboxylate water-reducing agent;

[0050] Cellulose ether: 0.01 kg of methylcellulose ether;

[0051] Insulation modifier: 2.5 kg magnesium borate, 2.5 kg chromium oxide;

[0052] Defoamer: 0.1 kg;

[0053] Retarder: 0.12 kg;

[0054] Composite material reinforcing ribs: 8 kg;

[0055] The composite material reinforcing ribs consist of 5.6 kg of fiber (carbon fiber) and 2.4 kg of resin (epoxy resin);

[0056] Method for preparing insulated concrete railway sleepers:

[0057] Step 1, Preparation of composite material reinforcing ribs: The composite material reinforcing ribs are prepared by curing fiber and resin composite materials through a pultrusion process. The specific method is as follows:

[0058] Weigh the above raw materials according to the weight proportions, heat the resin to 100-110℃ to melt it, wrap the fiber that has been stretched in the mold inside it, wait for the whole to solidify, demold it, and trim it to obtain the composite material reinforcing rib.

[0059] Step 2, Preparation of insulating concrete material: 1) Weigh the above raw materials according to the weight parts, put the special cement, sand and gravel into the mixer and mix evenly. Then put the remaining components (water reducing agent, cellulose ether, insulating modifier, defoamer and retarder) into the dry powder mixer, start the mixer and mix, so that the concrete components are fully mixed evenly. Add drinking water and mix evenly again.

[0060] Step 3: Prepare the sleeper mold according to the requirements of the new concrete IIIa sleeper drawings, and then place the composite material reinforcing bars in the sleeper mold;

[0061] Step 4: The prepared concrete material is fed into the concrete placing machine through the mixer and evenly distributed into the sleeper mold. It is then vibrated and allowed to stand for 1-2 hours before being steam cured. Finally, it is demolded.

[0062] The steam curing treatment was carried out at a temperature of 55±5℃ for 8±0.5h, with a heating rate of 15℃ / h before steam curing and a cooling rate of 15℃ / h after steam curing.

[0063] Example 2

[0064] An insulated concrete sleeper, characterized in that it comprises an insulated concrete sleeper body and composite material reinforcing ribs embedded within the concrete sleeper body, wherein the insulated concrete sleeper body comprises the following raw materials by weight:

[0065] High aluminate special cement: 150 kg;

[0066] Sand: 250 kg of river sand;

[0067] Stones: 360 kg of mountain gravel;

[0068] Drinking water: 40 kg;

[0069] Water-reducing agent: 1.5 kg of polycarboxylate water-reducing agent;

[0070] Cellulose ether: 0.01 kg of methylcellulose ether;

[0071] Insulation modifier: 5 kg of boron oxide;

[0072] Defoamer: 0.02 kg;

[0073] Retarder: 0.1 kg;

[0074] Composite material reinforcing ribs: 8 kg;

[0075] The composite material reinforcing ribs consist of 5.6 kg of basalt fiber and 2.4 kg of polyurethane resin.

[0076] Preparation method of insulated concrete sleepers: Same as in Example 1, except that the resin is heated to 140-160℃ to melt.

[0077] Example 3

[0078] An insulated concrete sleeper, characterized in that it comprises an insulated concrete sleeper body and composite material reinforcing ribs embedded within the concrete sleeper body, wherein the insulated concrete sleeper body comprises the following raw materials by weight:

[0079] Self-stressing sulfoaluminate cement: 150 kg;

[0080] Sand: 250 kg of river sand;

[0081] Stones: 360 kg of mountain gravel;

[0082] Drinking water: 40 kg;

[0083] Water-reducing agent: 1.5 kg of polycarboxylate water-reducing agent;

[0084] Cellulose ether: 0.01 kg of methylcellulose ether;

[0085] Insulation modifier: 5 kg of barium borate;

[0086] Defoamer: 0.02 kg;

[0087] Retarder: 0.1 kg;

[0088] Composite material reinforcing ribs: 8 kg;

[0089] The composite material reinforcing ribs consist of 5.6 kg of glass fiber and 2.4 kg of vinyl ester resin.

[0090] Preparation method of insulated concrete sleepers: Same as in Example 1, except that the resin is heated to 160-170℃ to melt.

[0091] Example 4

[0092] An insulated concrete sleeper, characterized in that it comprises an insulated concrete sleeper body and composite material reinforcing ribs embedded within the concrete sleeper body, wherein the insulated concrete sleeper body comprises the following raw materials by weight:

[0093] Ferroaluminate cement: 150 kg;

[0094] Sand: 250 kg of river sand;

[0095] Stones: 360 kg of mountain gravel;

[0096] Drinking water: 40 kg;

[0097] Water-reducing agent: 1.5 kg of polycarboxylate water-reducing agent;

[0098] Cellulose ether: 0.01 kg of methylcellulose ether;

[0099] Insulation modifier: 5 kg of tin oxide;

[0100] 0.02 kg of defoamer;

[0101] Retarder: 0.1 kg;

[0102] Composite material reinforcing ribs: 8 kg;

[0103] The composite material reinforcing ribs consist of 5.6 kg of ceramic fiber and 2.4 kg of unsaturated polyester resin.

[0104] Preparation method of insulated concrete sleepers: Same as in Example 1, except that the resin is heated to 100-120℃ to melt.

[0105] Example 5

[0106] An insulated concrete sleeper, characterized in that it comprises an insulated concrete sleeper body and composite material reinforcing ribs embedded within the concrete sleeper body, wherein the insulated concrete sleeper body comprises the following raw materials by weight:

[0107] High aluminate cement: 150 kg;

[0108] Sand: 250 kg of river sand;

[0109] Stones: 360 kg of mountain gravel;

[0110] Drinking water: 40 kg;

[0111] Water-reducing agent: 1.5 kg of polycarboxylate water-reducing agent;

[0112] Cellulose ether: 0.01 kg of methylcellulose ether;

[0113] Insulation modifier: 5 kg of aspartic acid;

[0114] Defoamer: 0.02 kg;

[0115] Retarder: 0.1 kg;

[0116] Composite material reinforcing ribs: 8 kg;

[0117] The composite material reinforcing ribs consist of 5.6 kg of aramid fiber and 2.4 kg of phenolic resin.

[0118] Preparation method of insulated concrete sleepers: Same as in Example 1, except that the resin is heated to 150-170℃ to melt.

[0119] Example 6:

[0120] An insulated concrete sleeper, characterized in that it comprises an insulated concrete sleeper body and composite material reinforcing ribs embedded within the concrete sleeper body, wherein the insulated concrete sleeper body comprises the following raw materials by weight:

[0121] Ferroaluminate cement: 150 kg;

[0122] Sand: 250 kg of river sand;

[0123] Stones: 360 kg of mountain gravel;

[0124] Drinking water: 40 kg;

[0125] Water-reducing agent: 1.5 kg of polycarboxylate water-reducing agent;

[0126] Cellulose ether: 0.01 kg of methylcellulose ether;

[0127] Insulation modifier: 2.5 kg of asparagine, 2.5 kg of nickel oxide;

[0128] Defoamer: 0.02 kg;

[0129] Retarder: 0.1 kg;

[0130] Composite material reinforcing ribs: 8 kg;

[0131] The composite material reinforcing ribs consist of 5.6 kg of basalt fiber and 2.4 kg of epoxy resin.

[0132] Preparation method of insulated concrete sleepers: Same as in Example 1, except that the resin is heated to 100-110℃ to melt.

[0133] Example 7:

[0134] An insulated concrete sleeper, characterized in that it comprises an insulated concrete sleeper body and composite material reinforcing ribs embedded within the concrete sleeper body, wherein the insulated concrete sleeper body comprises the following raw materials by weight:

[0135] High-alumina cement: 150 kg;

[0136] Sand: 250 kg of river sand;

[0137] Stones: 360 kg of mountain gravel;

[0138] Drinking water: 40 kg;

[0139] Water-reducing agent: 1.5 kg of polycarboxylate water-reducing agent;

[0140] Cellulose ether: 0.01 kg of methylcellulose ether;

[0141] Insulation modifier: 5 kg of manganese borate;

[0142] Defoamer: 0.02 kg;

[0143] Retarder: 0.1 kg;

[0144] Composite material reinforcing ribs: 8 kg;

[0145] The composite material reinforcing ribs consist of 5.6 kg of carbon fiber and 2.4 kg of vinyl resin.

[0146] Preparation method of insulated concrete sleepers: Same as in Example 1, except that the resin is heated to 160-170℃ to melt.

[0147] Example 8

[0148] An insulated concrete railway sleeper, characterized in that it comprises an insulated concrete sleeper body and composite material reinforcing ribs embedded within the concrete sleeper body, wherein the insulated concrete sleeper body comprises the following raw materials by weight:

[0149] Aluminate cement: 150 kg;

[0150] Sand: 250 kg of river sand;

[0151] Stones: 360 kg of mountain gravel;

[0152] Drinking water: 40 kg;

[0153] Water-reducing agent: 1.5 kg of polycarboxylate water-reducing agent;

[0154] Cellulose ether: 0.01 kg of methylcellulose ether

[0155] Insulation modifier: 5 kg of methionine;

[0156] Defoamer: 0.02 kg;

[0157] Retarder: 0.1 kg;

[0158] Composite material reinforcing ribs: 8 kg;

[0159] The composite material reinforcing ribs consist of 5.6 kg of glass fiber and 2.4 kg of polyurethane resin.

[0160] Preparation method of insulated concrete sleepers: Same as in Example 1, except that the resin is heated to 140-160℃ to melt.

[0161] Comparative Example 1

[0162] Similar to Example 1, except that sulfoaluminate cement is replaced with ordinary silicate cement and the insulating additive is omitted.

[0163] Comparative Example 2

[0164] Similar to Example 1, 2.5 kg of magnesium borate and 2.5 kg of chromium oxide were added as insulation modifiers. The difference was that sulfoaluminate cement was replaced with ordinary silicate cement.

[0165] Comparative Example 3

[0166] Similar to Example 1, sulfoaluminate cement is still used, the difference being that no insulating modifier is added;

[0167] Comparative Example 4

[0168] Similar to Example 1, the sulfoaluminate cement was replaced with ordinary silicate cement. The difference was that 5 kg of polyphenols, another type of insulation modifier, was used instead of 2.5 kg of magnesium borate and 2.5 kg of chromium oxide in Example 1.

[0169] Comparative Example 5

[0170] Similar to Example 1, sulfoaluminate cement was still used. The difference was that 5 kg of polyphenols, another type of insulating modifier, was used to replace 2.5 kg of magnesium borate and 2.5 kg of chromium oxide in Example 1.

[0171] Comparative Example 6

[0172] Similar to Example 1, 2.5 kg of magnesium borate and 2.5 kg of chromium oxide were added as insulation modifiers. The difference was that barium cement, a special type of cement, was used instead of sulfoaluminate cement in Example 1.

[0173] Comparative Example 7

[0174] Similar to Example 1, except that prestressed steel bars of type 7.00-1570WCD-H are used to replace the composite material reinforcing bars.

[0175] Comparative Example 8

[0176] An insulated concrete sleeper is the same as in Example 2, except that resin-reinforced ribs are used instead of composite material ribs in Example 2.

[0177] Preparation method of insulated concrete sleeper: Same as in Example 1, except that resin reinforcing ribs are used instead of composite material reinforcing ribs in Example 2. In step 1, the preparation method of resin reinforcing ribs includes the following steps: heating polyurethane resin to 140-160℃ to melt it, stretching it in a mold, waiting for the resin to solidify, demolding it, and trimming it to obtain resin reinforcing ribs.

[0178] Example of effect

[0179] The results of the performance tests of the insulated concrete sleepers in each embodiment and comparative example are shown in Table 1.

[0180] Compressive strength determination: The determination was carried out in accordance with GB / T 50081-2002 "Test Methods for Mechanical Properties of Ordinary Concrete" standard;

[0181] Fatigue resistance test: The test was conducted in accordance with the standard TBT 1878-2002 "Fatigue Test Method for Prestressed Concrete Sleepers";

[0182] Insulation performance test: The test was conducted according to the Q / CR 352-2016 standard "Anchoring of Spiral Spikes for Concrete Sleepers". The specific method is as follows: The entire sleeper was immersed in water for 24 hours at a water temperature not lower than 15℃. Considering the long rainy season in the south, which places higher demands on the water resistance of the sleepers, a wet insulation resistance test was specifically conducted on the sleepers, immersing them in water for 48 hours at a water temperature not lower than 15℃.

[0183] Static load crack resistance test: The test was conducted in accordance with the standard TBT 1879-2002 "Test Method for Static Load Crack Resistance of Prestressed Concrete Sleepers";

[0184] Table 1

[0185]

[0186]

[0187] The results showed that the resistance values ​​changed very little after immersion for 24 hours and 48 hours in the insulation resistance test of Examples 1-8, which was significantly better than the comparative examples.

[0188] The embodiments described above are merely preferred embodiments of the present invention, and not an exhaustive list of all possible implementations of the present invention. Any obvious modifications made by those skilled in the art without departing from the principles and spirit of the present invention should be considered to be included within the scope of protection of the claims of the present invention.

Claims

1. An insulated concrete railway sleeper, characterized in that, The ingredients include the following parts by weight: Special cement: 10-30 parts; Sand: 20-40 parts; Pebbles: 35-55 portions; Drinking water: 3-10 servings; Water-reducing agent: 0.1-3 parts; Cellulose ether: 0-1 part; Insulation modifier: 0.01-10 parts; Defoamer: 0-5 parts; Retarder: 0-5 parts; Composite material reinforcing ribs: 0.3-10 parts; The special cement is high-alumina cement or aluminate special cement, and the aluminate special cement includes one or two of sulfoaluminate cement and ferroaluminate cement. The insulating modifier is selected from any one of boron oxide, tin oxide, barium borate, manganese borate, aspartic acid, and methionine; or, the insulating modifier is selected from a combination of magnesium borate and chromium oxide; or, the insulating modifier is selected from a combination of asparagine and nickel oxide.

2. The insulated concrete sleeper according to claim 1, characterized in that, The sand used is one or more of the following: river sand, mountain crushed sand, stone crushed sand, machine-made sand, and quartz sand. The stones are one or more of the following: river pebbles, mountain gravel, tailings, barite, and dolomite.

3. An insulated concrete sleeper according to claim 1, characterized in that, The water-reducing agent used is a polycarboxylate water-reducing agent; The cellulose ether is one or more of methylcellulose ether, hydroxypropyl methylcellulose ether, hydroxyethyl methylcellulose ether, hydroxyethyl cellulose ether, and hydroxyethyl ethyl cellulose ether. The defoamer is one or more of organosilicon, polyether, fatty acid, and phosphate ester; The retarder is one or more of the following: phosphate, borax, hydroxy acid and salt, polyhydroxy compound, and polyol.

4. An insulated concrete sleeper according to claim 1, characterized in that, The composite material reinforcing rib is made by curing fiber and resin composite materials through an extrusion process.

5. An insulated concrete sleeper according to claim 4, characterized in that, The fiber and resin composite material is prepared by mixing and compounding 65-75 wt% fiber and 25-35 wt% resin.

6. An insulated concrete sleeper according to claim 5, characterized in that, The fiber is one or more of glass fiber, carbon fiber, basalt fiber, aramid fiber, and ceramic fiber; The resin is one or more of unsaturated polyester resin, epoxy resin, phenolic resin, vinyl resin, and polyurethane resin.

7. A method for preparing an insulated concrete railway sleeper as described in any one of claims 1-6, characterized in that, Includes the following steps: Step 1: Weigh each raw material by weight, mix the special cement, sand, and gravel evenly, then add the water-reducing agent, cellulose ether, insulation modifier, defoamer, and retarder, mix thoroughly, and finally add drinking water and mix evenly to obtain concrete material. Step 2: Place the composite material reinforcing ribs into the sleeper mold; Step 3: The prepared concrete material is fed into the concrete placing machine through the mixer and evenly distributed into the sleeper mold. It is then vibrated and compacted. After standing for 1-2 hours, it is steam cured. Finally, it is demolded. The steam curing treatment is carried out at a temperature of 50-70℃ for 8-10 hours, with a heating rate of 15℃ / h before steam curing and a cooling rate of 15℃ / h after steam curing.

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