Resin concrete prefabricated drainage ditch and production process thereof

Abstract

The invention belongs to the field of building materials, and discloses a resin concrete prefabricated drainage ditch and a production process thereof.The resin concrete prefabricated drainage ditch comprises a ditch body which is made of a resin concrete material; the resin concrete material is prepared from the following components in parts by weight: 18 to 25 parts of vinyl ester resin, 5 to 10 parts of Portland cement, 10 to 15 parts of steel slag micro powder, 8 to 12 parts of fly ash, 35 to 50 parts of river sand, 2 to 6 parts of carbon fiber, 1 to 4 parts of nano silicon dioxide, 1 to 2 parts of benzoyl peroxide and 0.3 to 1.5 parts of N, N-dimethylaniline. The invention aims to overcome the defects in the prior art, and provides the resin concrete prefabricated drainage ditch and the production process thereof, the drainage ditch has the advantages of high strength, corrosion resistance, high drainage efficiency and the like, the production process is simple and feasible, and the product quality is stable and reliable.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building materials, in particular to a resin concrete prefabricated drainage ditch and a production process thereof. BACKGROUND

[0002] The drainage ditch is an important component of the drainage system, and its performance directly affects the drainage efficiency and service life. The traditional drainage ditch is mostly made of concrete, which has the problems of heavy weight, poor impermeability, easy corrosion, etc. The disadvantages of traditional concrete used in drainage ditch are more and more obvious. For example, in some urban renewal projects, such as Beijing Dajia Lane, Tongzhou District, etc., the old community drainage is not smooth, and when the traditional concrete drainage ditch is repaired, due to the complexity of the underground pipe network, the heavy weight of the traditional concrete drainage ditch leads to high cost and difficulty in excavation and repair. In the case of increasing extreme weather, the poor impermeability of traditional concrete makes the urban drainage system face greater pressure.

[0003] As a new type of composite material, resin concrete has the advantages of high strength, corrosion resistance, good forming performance, etc., and has excellent acid and alkali resistance and corrosion resistance, which can cope with extreme environments such as deicing salt and fuel oil. However, the resin concrete prefabricated drainage ditch in the prior art still has some deficiencies in material composition and production process. For example, the performance of the filler used in part of the resin concrete material is not good, which leads to the need to improve the mechanical properties and durability of the drainage ditch; the treatment of raw materials and the control of forming conditions in the production process are not precise enough, which affects the quality stability of the product.

[0004] Therefore, in order to solve the above problems, a resin concrete prefabricated drainage ditch with more excellent performance and a more reasonable production process and a production process thereof are provided. SUMMARY

[0005] The present application aims to overcome the deficiencies of the prior art and provide a resin concrete prefabricated drainage ditch and a production process thereof, which has the advantages of high strength, corrosion resistance, high drainage efficiency, etc., and the production process is simple and easy to implement, and the product quality is stable and reliable.

[0006] In order to achieve the above-mentioned purpose, the present application provides the following technical scheme: The technical scheme provided by the present application is: a resin concrete prefabricated drainage ditch, comprising a ditch body, the ditch body is made of resin concrete material, the resin concrete material is composed of the following components by weight: vinyl ester resin 18-25 parts, Portland cement 5-10 parts, steel slag micro powder 10-15 parts, fly ash 8-12 parts, river sand 35-50 parts, carbon fiber 2-6 parts, nano silicon dioxide 1-4 parts, benzoyl peroxide 1-2 parts, N, N-dimethyl aniline 0.3-1.5 parts.

[0007] Further, the steel slag micro-powder is obtained by ball milling the converter steel slag for 4-6 hours, and then sieving through a 200-300 mesh screen to obtain the micro-powder with a particle size of 10-30 μm. The fly ash is grade I fly ash, with a water demand ratio of ≤95%, a loss on ignition of ≤5%, and a fineness of 45 μm square hole screen residue of ≤12%.

[0008] Further, the inner side wall of the ditch body is provided with a plurality of flow guide convex strips, the flow guide convex strips are spaced apart along the length direction of the ditch body, the cross section of the flow guide convex strip is semicircular, the radius is 5-10 mm, and the spacing between adjacent flow guide convex strips is 20-30 mm.

[0009] Further, the carbon fiber is polyacrylonitrile-based carbon fiber, and when the surface treatment is performed, the carbon fiber is placed in a nitric acid solution with a concentration of 5-10%, soaked in a constant temperature water bath at 50-70°C for 30-60 minutes, then taken out, repeatedly washed with deionized water until neutral, and then placed in an oven at 80-100°C for drying for 2-3 hours for standby use.

[0010] Further, the outer wall of the ditch body is provided with an anti-corrosion coating, and the anti-corrosion coating is an epoxy resin coating, and the preparation method is as follows: the epoxy resin and the curing agent are mixed uniformly at a mass ratio of 3:1, and then sprayed on the surface of the ditch body by using a spraying process, the spraying pressure is controlled to be 0.3-0.5 MPa, and the coating thickness is controlled to be 0.2-0.5 mm, and the curing agent is an amine curing agent, specifically ethylenediamine or diethylenetriamine.

[0011] Further, the nano-silicon dioxide has a particle size of 10-50 nm and is modified by a silane coupling agent KH-550, and the amount of the silane coupling agent KH-550 used in the modification is 2-5% of the mass of the nano-silicon dioxide.

[0012] Further, the two ends of the ditch body are respectively provided with connecting parts, the connecting parts are flange structures, bolt holes are formed on the flange structures, the diameter of the bolt holes is 8-12 mm, and adjacent ditch bodies are connected by bolts passing through the bolt holes.

[0013] A production process of a resin concrete prefabricated drainage ditch is used for producing the resin concrete prefabricated drainage ditch, and comprises the following steps: S1: raw material pretreatment: the river sand is sieved on a vibrating screen, and the river sand with a particle size of 0.5-2 mm is selected and then placed in a drying oven with a temperature set to 110-130°C for drying for 1.5-2.5 hours; the polyacrylonitrile-based carbon fiber is placed in a nitric acid solution with a concentration of 5-10%, soaked in a constant temperature water bath at 50-70°C for 30-60 minutes, then taken out, repeatedly washed with deionized water until neutral, and then placed in an oven at 80-100°C for drying for 2-3 hours for standby use; S2: material mixing: first, add the vinyl ester resin, benzoyl peroxide and N, N-dimethyl aniline into the planetary stirring device, set the stirring speed to 150-250 r / min, and stir for 3-8 minutes; then add the Portland cement, steel slag powder, fly ash and nano silicon dioxide, adjust the stirring speed to 250-350 r / min, and stir for 10-20 minutes; then add the pretreated river sand and carbon fibers, stir at a speed of 200-300 r / min, and stir for 15-25 minutes to obtain the mixed material; S3: mold processing: prepare a steel mold matching the shape of the ditch body, polish the inner wall of the mold with sandpaper to remove rust, then wipe it clean with alcohol, and after the alcohol evaporates, evenly brush polytetrafluoroethylene release agent on the inner wall of the mold, with a coating thickness of 0.05-0.1 mm; S4: pouring and forming and curing treatment: pour the mixed material into the mold and place it in a vacuum vibration forming machine, first draw the vacuum degree to 0.08-0.1 MPa and maintain for 1-2 minutes, then start the vibration device, set the vibration frequency to 40-50 Hz, and vibrate for 7-13 minutes for forming; transfer the formed body together with the mold to the curing chamber, keep the temperature in the curing chamber at 20-30℃, and after 12-24 hours of static curing, demold; after demolding, place the ditch body on the curing rack, continue to cure in an environment with a temperature of 25-35℃ and a relative humidity of 50-60% for 3-5 days, and evenly spray the ditch body surface with silane curing agent once a day, the silane curing agent is specifically methyltrimethoxysilane, and the dilution ratio of the curing agent is 1:50 (silane curing agent: water) by volume; S5: post-processing: polish the outer wall of the cured ditch body, use 200-300 mesh sandpaper for rough grinding, and then use 400-600 mesh sandpaper for fine grinding, then mix the epoxy resin and amine curing agent uniformly according to a mass ratio of 3:1, evenly spray the ditch body surface using a spraying process, control the spraying pressure to be 0.3-0.5 MPa, and the coating thickness to be 0.2-0.5 mm, the amine curing agent is specifically ethylenediamine or diethylenetriamine, and finally cure in a curing oven with a temperature of 30-40℃ for 2-4 hours to obtain the resin concrete precast drainage ditch.

[0014] Further, the stirring paddle of the planetary stirring device in S2 is a double helix paddle, and the paddle diameter is 0.4-0.6 times the diameter of the stirring barrel.

[0015] Further, the vibration mode of the vacuum vibration forming machine in S4 is horizontal and vertical composite vibration, the horizontal vibration amplitude is 1-2 mm, and the vertical vibration amplitude is 0.5-2 mm.

[0016] The beneficial effects of the technical solution are: (1) In terms of material composition, the scientific ratio of components such as vinyl ester resin, steel slag powder, fly ash, river sand, carbon fiber, and nano-silica in this invention enables the precast resin concrete drainage ditch to possess high strength and good durability. The addition of steel slag powder and fly ash not only acts as a filler, reducing internal porosity and increasing density, thereby improving compressive strength, but also undergoes certain chemical reactions with other components, enhancing the overall stability and durability of the material. For example, in the embodiments, as the parameters of steel slag powder and fly ash are optimized, the compressive strength of the product gradually increases. After specific surface treatment, the interfacial bonding force between carbon fiber and the resin matrix is ​​enhanced, which can fully exert its reinforcing effect and significantly improve the flexural strength of the drainage ditch. For example, in the embodiments, changes in carbon fiber-related parameters have a significant impact on the flexural strength of the product.

[0017] (2) In the raw material pretreatment stage, the screening and drying of river sand ensured its uniform dispersion and good filling effect in the mixture; the surface treatment of carbon fiber laid the foundation for the subsequent synergistic effect with other materials. During the material mixing process, the double helix blades of the planetary mixer and the precise control of stirring speed and time at different stages ensured that each component was fully and evenly mixed, resulting in uniform and stable material properties. The mold treatment adopted operations such as grinding and rust removal, alcohol wiping and application of release agent to ensure the smooth progress of the molding process and the surface quality of the product. The casting molding adopted a vacuum vibration molding machine. Through the composite vibration in the horizontal and vertical directions, the air in the material was effectively discharged, which improved the density of the product and thus improved the mechanical properties and impermeability of the product. The curing and post-treatment, the appropriate curing temperature, humidity and curing agent, as well as the precise construction of the outer wall grinding and anti-corrosion coating, further improved the durability and corrosion resistance of the product. In the salt spray environment test, the products of each embodiment showed good corrosion resistance and the anti-corrosion coating was not significantly damaged.

[0018] (3) The resin concrete precast drainage ditch and its production process of the present invention are optimized in all aspects from materials to processes, so that the product has the advantages of high strength, corrosion resistance, high drainage efficiency and stable and reliable quality. It can be widely used in drainage systems of various places such as municipal engineering, residential communities, and racetracks, meeting the high performance requirements of drainage ditches in different scenarios, and has significant economic and social benefits. Attached Figure Description

[0019] Figure 1 This table compares the differences in the preparation of various embodiments of the precast resin concrete drainage ditch and its production process proposed in this invention. Figure 2 This is a data comparison table of a precast resin concrete drainage ditch and its production process proposed in this invention. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and 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.

[0021] The specific implementation process is as follows: Example 1: Please see Figures 1-2 This invention provides a technical solution: a precast resin concrete drainage ditch and its production process, made from the following raw materials by actual weight: 18 kg vinyl ester resin, 5 kg silicate cement, 10 kg steel slag powder, 8 kg fly ash, 35 kg river sand, 2 kg carbon fiber, 1 kg nano silica, 1 kg benzoyl peroxide, and 0.3 kg N,N-dimethylaniline; wherein, the steel slag powder is ball-milled from converter steel slag for 4 hours, passed through a 200-mesh sieve, and has a particle size of 10-30 μm; the fly ash is Grade I fly ash with a water requirement of 95%, a loss on ignition of 5%, and a fineness (45 μm square hole sieve residue) of 12%; the carbon fiber is polyacrylonitrile-based carbon fiber with a length of 5 mm and a tensile strength of 3000 MPa; the nano silica has a particle size of 10-50 nm and is modified with silane coupling agent KH-550, the amount of silane coupling agent KH-550 being 2% of the mass of nano silica; S1: Raw material pretreatment: River sand is placed on a vibrating screen for sieving, and river sand with a particle size of 0.5-2mm is selected. Then, it is placed in a drying oven with the temperature set at 110℃ and dried for 2.5 hours. Polyacrylonitrile-based carbon fiber is placed in a 5% nitric acid solution and soaked in a constant temperature water bath at 50℃ for 60 minutes. Then, it is taken out and rinsed repeatedly with deionized water until neutral. Then, it is placed in an oven at 80℃ and dried for 3 hours for later use. S2: Material Mixing: First, add vinyl ester resin, benzoyl peroxide, and N,N-dimethylaniline to a planetary mixer, set the stirring speed to 150 r / min, and stir for 8 minutes; then add steel slag powder, fly ash, and nano-silica, adjust the stirring speed to 250 r / min, and stir for 20 minutes; finally, add pretreated river sand and carbon fiber, and stir at 200 r / min for 25 minutes to obtain the mixture. S3: Mold treatment: Prepare a steel mold that matches the shape of the ditch. Use sandpaper to polish the inner wall of the mold to remove rust, then wipe it clean with alcohol. After the alcohol evaporates, apply polytetrafluoroethylene release agent evenly to the inner wall of the mold. The coating thickness should be controlled at 0.05mm. S4: Casting and Curing: Pour the mixture into the mold and place it in a vacuum vibration molding machine. First, draw the vacuum to 0.08 MPa and maintain it for 2 minutes. Then, turn on the vibration device, set the vibration frequency to 40 Hz, and vibrate for 13 minutes to form the mold. Transfer the formed blank along with the mold to the curing chamber. Maintain the temperature in the curing chamber at 20℃ and let it cure for 24 hours before demolding. After demolding, place the groove on the curing rack and continue curing for 5 days at a temperature of 25℃ and a relative humidity of 50%. Spray the surface of the groove with a silane curing agent evenly once a day. The silane curing agent is methyltrimethoxysilane, and the dilution ratio of the curing agent is 1:50 (silane curing agent: water). S5: Post-processing: Grind the outer wall of the cured ditch body, use 200-grit sandpaper for coarse grinding, and then use 400-grit sandpaper for fine grinding. Then, mix epoxy resin and ethylenediamine evenly at a mass ratio of 3:1, and spray the mixture evenly on the surface of the ditch body using a spraying process. Control the spraying pressure to be 0.3MPa and the coating thickness to be 0.2mm. Finally, cure the mixture in a curing oven at a temperature of 30℃ for 4 hours to obtain a precast resin concrete drainage ditch. The resin concrete precast drainage ditch prepared in this embodiment uses raw material ratios and process parameters within the scope of this invention. Through reasonable raw material selection and processing, as well as strict production process control, the drainage ditch exhibits good strength and impermeability. The addition of steel slag powder and fly ash not only improves material utilization and reduces costs but also enhances the strength of the drainage ditch. The surface treatment of carbon fiber enhances its bonding force with resin, further improving the mechanical properties of the drainage ditch. Reasonable curing and post-treatment processes ensure the quality stability of the drainage ditch.

[0022] Example 2: Please see Figures 1-2 The present invention provides a technical solution: a precast resin concrete drainage ditch and its production process, made from the following raw materials by actual weight: 20 kg vinyl ester resin, 7 kg silicate cement, 12 kg steel slag powder, 10 kg fly ash, 40 kg river sand, 4 kg carbon fiber, 2 kg nano silica, 1.5 kg benzoyl peroxide, and 1 kg N,N-dimethylaniline; wherein, the steel slag powder is obtained by ball milling converter steel slag, and the ball milling time is... The process involves 5 hours of sizing, passing through a 250-mesh sieve, with a particle size of 10-30 μm; the fly ash is Grade I fly ash, with a water requirement of 90%, a loss on ignition of 4%, and a fineness (residue on a 45 μm square-hole sieve) of 10%; the carbon fiber is polyacrylonitrile-based carbon fiber, 7 mm in length, with a tensile strength of 3200 MPa; the nano-silica has a particle size of 10-50 nm and is modified with silane coupling agent KH-550, with the amount of silane coupling agent KH-550 being 3% of the mass of the nano-silica; S1: Raw material pretreatment: River sand is placed on a vibrating screen for sieving, and river sand with a particle size of 0.5-2mm is selected. Then, it is placed in a drying oven with the temperature set at 120℃ and dried for 2 hours. Polyacrylonitrile-based carbon fiber is placed in a 7% nitric acid solution and soaked in a constant temperature water bath at 60℃ for 45 minutes. Then, it is taken out and rinsed repeatedly with deionized water until neutral. Then, it is placed in a drying oven at 90℃ and dried for 2.5 hours for later use. S2: Material Mixing: First, add vinyl ester resin, benzoyl peroxide, and N,N-dimethylaniline to a planetary mixer, set the stirring speed to 200 r / min, and stir for 5 minutes; then add steel slag powder, fly ash, and nano-silica, adjust the stirring speed to 300 r / min, and stir for 15 minutes; then add pretreated river sand and carbon fiber, and stir at 250 r / min for 20 minutes to obtain the mixture. S3: Mold treatment: Prepare a steel mold that matches the shape of the ditch. Use sandpaper to polish the inner wall of the mold to remove rust, then wipe it clean with alcohol. After the alcohol evaporates, apply polytetrafluoroethylene release agent evenly to the inner wall of the mold. The coating thickness should be controlled at 0.07mm. S4: Casting and Curing: Pour the mixture into the mold and place it in a vacuum vibration molding machine. First, draw the vacuum to 0.09 MPa and maintain it for 1.5 minutes. Then, turn on the vibration device, set the vibration frequency to 45 Hz, and vibrate for 10 minutes to form the mold. Transfer the formed blank along with the mold to the curing chamber. Maintain the temperature in the curing chamber at 25℃ and let it cure for 18 hours before demolding. After demolding, place the groove on the curing rack and continue curing for 4 days at a temperature of 30℃ and a relative humidity of 55%. Spray the surface of the groove with a silane curing agent evenly once a day. The silane curing agent is methyltrimethoxysilane, and the dilution ratio of the curing agent is 1:50 (silane curing agent: water). S5: Post-processing: Grind the outer wall of the cured ditch body, use 250-grit sandpaper for coarse grinding, and then use 500-grit sandpaper for fine grinding. Then, mix epoxy resin and diethylenetriamine evenly at a mass ratio of 3:1, and spray it evenly on the surface of the ditch body using a spraying process. Control the spraying pressure to be 0.4MPa and the coating thickness to be 0.3mm. Finally, cure it in a curing oven at a temperature of 35℃ for 3 hours to obtain a precast resin concrete drainage ditch. In this embodiment, the raw material ratio and process parameters have been appropriately adjusted, and all parameters are within the scope of this invention. Compared with Example 1, the treatment temperature and time of carbon fiber in the raw material pretreatment, the rotation speed and time of material mixing, etc. have been changed, making the mixture more uniform and beneficial to improving the performance of the drainage ditch. The drainage ditch prepared in this embodiment performs well in terms of strength and impermeability, meeting the actual use requirements.

[0023] Example 3: Please see Figures 1-2 The present invention provides a technical solution: a precast resin concrete drainage ditch and its production process, made from the following raw materials by actual weight: 22 kg vinyl ester resin, 8 kg silicate cement, 13 kg steel slag powder, 10 kg fly ash, 45 kg river sand, 5 kg carbon fiber, 3 kg nano silica, 1.5 kg benzoyl peroxide, and 1 kg N,N-dimethylaniline; wherein, the steel slag powder is obtained by ball milling converter steel slag, and the ball milling time is... The process takes 5 hours, passes through a 250-mesh sieve, and the particle size is 10-30μm; the fly ash is Grade I fly ash, with a water requirement ratio of 92%, a loss on ignition of 4%, and a fineness (residue on a 45μm square-hole sieve) of 10%; the carbon fiber is polyacrylonitrile-based carbon fiber, with a length of 7mm and a tensile strength of 3200MPa; the nano-silica has a particle size of 10-50nm, and is modified with silane coupling agent KH-550, with the amount of silane coupling agent KH-550 being 3% of the mass of the nano-silica; S1: Raw material pretreatment: River sand is placed on a vibrating screen for sieving, and river sand with a particle size of 0.5-2mm is selected. Then, it is placed in a drying oven with the temperature set at 120℃ and dried for 2 hours. Polyacrylonitrile-based carbon fiber is placed in a 7% nitric acid solution and soaked in a constant temperature water bath at 60℃ for 45 minutes. Then, it is taken out and rinsed repeatedly with deionized water until neutral. Then, it is placed in a drying oven at 90℃ and dried for 2.5 hours for later use. S2: Material Mixing: First, add vinyl ester resin, benzoyl peroxide, and N,N-dimethylaniline to a planetary mixer, set the stirring speed to 200 r / min, and stir for 5 minutes; then add steel slag powder, fly ash, and nano-silica, adjust the stirring speed to 300 r / min, and stir for 15 minutes; then add pretreated river sand and carbon fiber, and stir at 250 r / min for 20 minutes to obtain the mixture. S3: Mold treatment: Prepare a steel mold that matches the shape of the ditch. Use sandpaper to polish the inner wall of the mold to remove rust, then wipe it clean with alcohol. After the alcohol evaporates, apply polytetrafluoroethylene release agent evenly to the inner wall of the mold. The coating thickness should be controlled at 0.07mm. S4: Casting and Curing: Pour the mixture into the mold and place it in a vacuum vibration molding machine. First, draw the vacuum to 0.09 MPa and maintain it for 1.5 minutes. Then, turn on the vibration device, set the vibration frequency to 45 Hz, and vibrate for 10 minutes to form the mold. Transfer the formed blank along with the mold to the curing chamber. Maintain the temperature in the curing chamber at 25℃ and let it cure for 18 hours before demolding. After demolding, place the groove on the curing rack and continue curing for 4 days at a temperature of 30℃ and a relative humidity of 55%. Spray the surface of the groove evenly with a silane curing agent once a day. The dilution ratio of the curing agent is 1:50 (silane curing agent: water). S5: Post-processing: Grind the outer wall of the cured ditch body, use 250-grit sandpaper for coarse grinding, and then use 500-grit sandpaper for fine grinding. Then, mix epoxy resin and ethylenediamine evenly at a mass ratio of 3:1, and spray the mixture evenly on the surface of the ditch body using a spraying process. Control the spraying pressure to be 0.4MPa and the coating thickness to be 0.3mm. Finally, cure the mixture in a curing oven at a temperature of 35℃ for 3 hours to obtain a precast resin concrete drainage ditch. The raw material ratio and process parameters in this embodiment are further optimized, which improves production efficiency while ensuring the performance of the drainage ditch; the rational utilization of industrial waste such as steel slag powder and fly ash is in line with the concept of energy conservation and environmental protection; the strength, impermeability and other performance indicators of this drainage ditch are superior to those of traditional concrete drainage ditches, and can meet the needs of different scenarios.

[0024] Example 4: Please see Figures 1-2 The present invention provides a technical solution: a precast resin concrete drainage ditch and its production process, made from the following raw materials by actual weight: 23 kg vinyl ester resin, 9 kg silicate cement, 14 kg steel slag powder, 11 kg fly ash, 48 kg river sand, 5.5 kg carbon fiber, 3.5 kg nano silica, 1.8 kg benzoyl peroxide, and 1.2 kg N,N-dimethylaniline; wherein, the steel slag powder is obtained by ball milling converter steel slag. The time was 5.5 hours, and the particles were passed through a 280-mesh sieve with a particle size of 10-30 μm; the fly ash was Grade I fly ash with a water requirement of 93%, a loss on ignition of 4.5%, and a fineness (residue on a 45 μm square-hole sieve) of 11%; the carbon fiber was polyacrylonitrile-based carbon fiber with a length of 8 mm and a tensile strength of 3200 MPa; the nano-silica particles had a particle size of 10-50 nm and were modified with silane coupling agent KH-550, with the amount of silane coupling agent KH-550 being 4% of the mass of the nano-silica; S1: Raw material pretreatment: River sand is placed on a vibrating screen for sieving, and river sand with a particle size of 0.5-2mm is selected. Then, it is placed in a drying oven with the temperature set at 125℃ and dried for 2 hours. Polyacrylonitrile-based carbon fiber is placed in an 8% nitric acid solution and soaked in a constant temperature water bath at 65℃ for 40 minutes. Then, it is taken out and rinsed repeatedly with deionized water until neutral. Then, it is placed in a drying oven at 95℃ and dried for 2.2 hours for later use. S2: Material Mixing: First, add vinyl ester resin, benzoyl peroxide, and N,N-dimethylaniline to a planetary mixer, set the stirring speed to 230 r / min, and stir for 6 minutes; then add steel slag powder, fly ash, and nano-silica, adjust the stirring speed to 330 r / min, and stir for 17 minutes; finally, add pretreated river sand and carbon fiber, and stir at 280 r / min for 22 minutes to obtain the mixture. S3: Mold treatment: Prepare a steel mold that matches the shape of the ditch. Use sandpaper to polish the inner wall of the mold to remove rust, then wipe it clean with alcohol. After the alcohol evaporates, apply polytetrafluoroethylene release agent evenly to the inner wall of the mold. The coating thickness should be controlled at 0.08mm. S4: Casting and Curing: Pour the mixture into the mold and place it in a vacuum vibration molding machine. First, draw the vacuum to 0.095 MPa and maintain it for 1.3 minutes. Then, turn on the vibration device, set the vibration frequency to 47 Hz, and vibrate for 9 minutes to form the mold. Transfer the formed blank along with the mold to the curing chamber. Maintain the temperature in the curing chamber at 28℃ and let it cure for 16 hours before demolding. After demolding, place the groove on the curing rack and continue curing for 3.5 days at a temperature of 32℃ and a relative humidity of 58%. Spray the surface of the groove with a silane curing agent evenly once a day. The silane curing agent is methyltrimethoxysilane, and the dilution ratio of the curing agent is 1:50 (silane curing agent: water). S5: Post-processing: Grind the outer wall of the cured ditch body, use 280-grit sandpaper for coarse grinding, and then use 550-grit sandpaper for fine grinding. Then, mix epoxy resin and diethylenetriamine evenly at a mass ratio of 3:1, and spray it evenly on the surface of the ditch body using a spraying process. Control the spraying pressure to be 0.45MPa and the coating thickness to be 0.4mm. Finally, cure it in a curing oven at a temperature of 37℃ for 2.5 hours to obtain a precast resin concrete drainage ditch. This embodiment further adjusts the raw material dosage and process parameters, appropriately increasing the dosage of vinyl ester resin and steel slag powder, which improves the overall strength of the ditch. In the material mixing stage, by increasing the stirring speed and adjusting the time, the raw materials are mixed more thoroughly and the interface bonding is tighter. In the post-processing, the optimization of spraying pressure and coating thickness enhances the anti-corrosion performance, enabling the drainage ditch to adapt to more complex outdoor environments.

[0025] Example 5: Please see Figures 1-2 This invention provides a technical solution: a precast resin concrete drainage ditch and its production process, made from the following raw materials by actual weight: 24 kg vinyl ester resin, 9.5 kg silicate cement, 14.5 kg steel slag powder, 11.5 kg fly ash, 49 kg river sand, 5.8 kg carbon fiber, 3.8 kg nano silica, 1.9 kg benzoyl peroxide, and 1.4 kg N,N-dimethylaniline; wherein, the steel slag powder is obtained by ball milling converter steel slag. The time was 5.8 hours, and the particle size was 10-30μm after passing through a 290-mesh sieve. The fly ash was Grade I fly ash with a water requirement of 94%, a loss on ignition of 4.8%, and a fineness (residue on a 45μm square-hole sieve) of 11.5%. The carbon fiber was polyacrylonitrile-based carbon fiber with a length of 9mm and a tensile strength of 3300MPa. The nano-silica had a particle size of 10-50nm and was modified with silane coupling agent KH-550, which was used at 4.5% of the mass of the nano-silica. S1: Raw material pretreatment: River sand is placed on a vibrating screen for sieving, and river sand with a particle size of 0.5-2mm is selected. Then, it is placed in a drying oven with a temperature set at 128℃ and dried for 1.8 hours. Polyacrylonitrile-based carbon fiber is placed in a 9% nitric acid solution and soaked in a constant temperature water bath at 68℃ for 35 minutes. Then, it is taken out and rinsed repeatedly with deionized water until neutral. Then, it is placed in a drying oven at 98℃ and dried for 2.1 hours for later use. S2: Material Mixing: First, add vinyl ester resin, benzoyl peroxide, and N,N-dimethylaniline to a planetary mixer, set the stirring speed to 240 r / min, and stir for 7 minutes; then add steel slag powder, fly ash, and nano-silica, adjust the stirring speed to 340 r / min, and stir for 18 minutes; finally, add pretreated river sand and carbon fiber, and stir at 290 r / min for 23 minutes to obtain the mixture. S3: Mold treatment: Prepare a steel mold that matches the shape of the ditch. Use sandpaper to polish the inner wall of the mold to remove rust, then wipe it clean with alcohol. After the alcohol evaporates, apply polytetrafluoroethylene release agent evenly to the inner wall of the mold. The coating thickness should be controlled at 0.09mm. S4: Casting and Curing: Pour the mixture into the mold and place it in a vacuum vibration molding machine. First, draw the vacuum to 0.098 MPa and maintain it for 1.2 minutes. Then, turn on the vibration device, set the vibration frequency to 48 Hz, and vibrate for 8 minutes to form the mold. Transfer the formed green body along with the mold to the curing chamber. Maintain the temperature in the curing chamber at 29℃ and let it cure for 15 hours before demolding. After demolding, place the groove on the curing rack and continue curing for 3.2 days at a temperature of 34℃ and a relative humidity of 59%. Spray the surface of the groove with a silane curing agent evenly once a day. The silane curing agent is methyltrimethoxysilane, and the dilution ratio of the curing agent is 1:50 (silane curing agent: water). S5: Post-processing: Grind the outer wall of the cured ditch body, use 290-grit sandpaper for coarse grinding, and then use 580-grit sandpaper for fine grinding. Then, mix epoxy resin and ethylenediamine evenly at a mass ratio of 3:1, and spray the mixture evenly on the surface of the ditch body using a spraying process. Control the spraying pressure to be 0.48MPa and the coating thickness to be 0.45mm. Finally, cure the mixture in a curing oven at a temperature of 38℃ for 2.2 hours to obtain a precast resin concrete drainage ditch. This embodiment features more refined raw material selection and process control. The increased carbon fiber length and tensile strength further enhance the crack resistance of the ditch. In the vacuum vibration molding stage, the higher vacuum level and appropriate vibration time reduce air bubbles inside the material and improve density. Overall, this drainage ditch performs excellently in terms of strength, impermeability, and durability, making it suitable for engineering projects with high performance requirements.

[0026] Example 6: Please see Figures 1-2 The present invention provides a technical solution: a precast resin concrete drainage ditch and its production process, made from the following raw materials by actual weight: 25 kg vinyl ester resin, 10 kg silicate cement, 15 kg steel slag powder, 12 kg fly ash, 50 kg river sand, 6 kg carbon fiber, 4 kg nano silica, 2 kg benzoyl peroxide, and 1.5 kg N,N-dimethylaniline; wherein, the steel slag powder is obtained by ball milling converter steel slag, and the ball milling time is... The process involves 6 hours of sizing, passing through a 300-mesh sieve, with a particle size of 10-30 μm; the fly ash is Grade I fly ash, with a water requirement of 90%, a loss on ignition of 4%, and a fineness (residue on a 45 μm square-hole sieve) of 10%; the carbon fiber is polyacrylonitrile-based carbon fiber, 10 mm in length, with a tensile strength of 3500 MPa; the nano-silica has a particle size of 10-50 nm and is modified with silane coupling agent KH-550, with the amount of silane coupling agent KH-550 being 5% of the mass of the nano-silica. S1: Raw material pretreatment: River sand is placed on a vibrating screen for sieving, and river sand with a particle size of 0.5-2mm is selected. Then, it is placed in a drying oven with the temperature set at 130℃ and dried for 1.5 hours. Polyacrylonitrile-based carbon fiber is placed in a 10% nitric acid solution and soaked in a constant temperature water bath at 70℃ for 30 minutes. Then, it is taken out and rinsed repeatedly with deionized water until neutral. Then, it is placed in a drying oven at 100℃ and dried for 2 hours for later use. S2: Material Mixing: First, add vinyl ester resin, benzoyl peroxide, and N,N-dimethylaniline to a planetary mixer, set the stirring speed to 250 r / min, and stir for 3 minutes; then add steel slag powder, fly ash, and nano silica, adjust the stirring speed to 350 r / min, and stir for 10 minutes; finally, add pretreated river sand and carbon fiber, and stir at 300 r / min for 15 minutes to obtain the mixture. S3: Mold treatment: Prepare a steel mold that matches the shape of the ditch. Use sandpaper to polish the inner wall of the mold to remove rust, then wipe it clean with alcohol. After the alcohol evaporates, apply polytetrafluoroethylene release agent evenly to the inner wall of the mold. The coating thickness should be controlled at 0.1mm. S4: Casting and Curing: Pour the mixture into the mold and place it in a vacuum vibration molding machine. First, draw the vacuum to 0.1 MPa and maintain it for 1 minute. Then, turn on the vibration device, set the vibration frequency to 50 Hz, and vibrate for 7 minutes to form the mold. Transfer the formed green body along with the mold to the curing chamber. Maintain the temperature in the curing chamber at 30℃ and let it cure for 12 hours before demolding. After demolding, place the groove on the curing rack and continue curing for 3 days at a temperature of 35℃ and a relative humidity of 60%. Spray the surface of the groove with a silane curing agent once a day. The silane curing agent is methyltrimethoxysilane, and the dilution ratio of the curing agent is 1:50 (silane curing agent: water). S5: Post-processing: Grind the outer wall of the cured ditch body, use 300-grit sandpaper for coarse grinding, and then use 600-grit sandpaper for fine grinding. Then, mix epoxy resin and diethylenetriamine evenly at a mass ratio of 3:1, and spray it evenly on the surface of the ditch body using a spraying process. Control the spraying pressure to be 0.5MPa and the coating thickness to be 0.5mm. Finally, cure it in a curing oven at a temperature of 40℃ for 2 hours to obtain a precast resin concrete drainage ditch. This embodiment uses the upper limit values ​​of the raw material dosages in the claims, and the process parameters are also within the upper limit range; the higher resin dosage and finer steel slag powder result in better compactness of the ditch body and excellent impermeability; the shorter curing time and higher curing temperature improve production efficiency while ensuring quality; the drainage ditch has the best overall performance and can meet the drainage needs of various harsh environments.

[0027] Comparative Example 1 Please see Figures 1-2 The present invention provides a comparative technical solution: made from the following raw materials in actual weight: 20kg of ordinary epoxy resin, 40kg of quartz sand, 15kg of ordinary silicate cement, 3kg of carbon fiber, 2kg of nano calcium carbonate, 1kg of curing agent, and 0.5kg of accelerator; wherein the carbon fiber is not surface treated and has a length of 5-10mm. S1: Raw material pretreatment: Quartz sand was sieved and dried, and the carbon fiber was not treated in any way; S2: Material mixing: Add all raw materials to a standard mixing device, mix at 200 r / min for 20 minutes to obtain a mixture; S3: Mold treatment: Use ordinary steel molds, simply clean them and then apply machine oil as a release agent; S4: Casting and Curing: Pour the mixture into the mold and manually vibrate it to form the shape; after molding, cure it in a natural environment for 7 days. S5: Post-processing: No special polishing or anti-corrosion coating treatment was performed; The comparative example did not use the vinyl ester resin, steel slag powder, fly ash and other raw materials of the present invention, and the carbon fiber was not treated. The production process was simple and crude. The drainage ditch prepared by it had low strength and poor impermeability. Under the same test conditions, the compressive strength was only 60% of that of Example 2, the impermeability pressure was only 50% of that of Example 2, and the service life was short, which could not meet the requirements for long-term use.

[0028] Comparative Example 2 Please see Figures 1-2 The present invention provides a comparative technical solution: made from the following raw materials in actual weight: 15 kg vinyl ester resin, 8 kg steel slag powder, 6 kg fly ash, 30 kg river sand, 1 kg carbon fiber, 0.5 kg nano silica, 0.5 kg benzoyl peroxide, and 0.2 kg N,N-dimethylaniline; the parameters of each raw material are basically the same as in the example, but the amount used is lower than the lower limit of the claims of the present invention; S1: Raw material pretreatment: Same as the pretreatment method in Example 2, but the carbon fiber treatment time is shortened to 20 minutes; S2: Material mixing: The stirring speed and time are both lower than the parameters of Example 2, such as an initial stirring speed of 100 r / min and a stirring time of 10 minutes; S3: Mold treatment: Same as in Example 2, but the release agent coating thickness is only 0.03mm; S4: Casting and curing: Vacuum degree 0.05MPa, vibration frequency 30Hz, curing time shortened to 2 days, and no curing agent was sprayed; S5: Post-processing: use low grit sandpaper, 0.1mm thick anti-corrosion coating, and cure at 25℃; The comparative example had insufficient raw material usage and the process parameters did not meet the requirements of this invention. Due to the small amount of resin and reinforcing material, the materials were not mixed evenly and the molding was not dense, resulting in a decrease in the strength and impermeability of the drainage ditch. The compressive strength was 70% of that of Example 2, the impermeability was also significantly reduced, and the surface was prone to cracking, which could not meet the performance standards for normal use.

[0029] Comparative Example 3 Please see Figures 1-2 The present invention provides a comparative technical solution: using the same raw materials as in Example 2, but without adding steel slag powder and fly ash, and replacing them with an equal amount of river sand; S1: Raw material pretreatment: Same as in Example 2; S2: Material mixing: Same as in Example 2; S3: Mold processing: Same as in Example 2; S4: Casting and curing: Same as in Example 2; S5: Post-processing: Same as Example 2; This comparative example lacks steel slag powder and fly ash. Although other conditions are the same as in Example 2, the absence of these two industrial wastes not only increases material costs but also affects the strength and durability of the trench. Its compressive strength is 15% lower and its flexural strength is 20% lower than in Example 2. Furthermore, due to the lack of these two components to fill and reinforce the structure, it is prone to wear and breakage during long-term use, demonstrating the importance of steel slag powder and fly ash in this invention.

[0030] This technology, through improvements to the resin concrete formulation and production process, demonstrates significantly superior overall performance compared to the comparative example in six embodiments. From the perspective of the raw material system, all embodiments use vinyl ester resin as the matrix, combined with industrial waste such as steel slag powder and fly ash as functional fillers, forming a unique composite reinforcement system. Compared to the ordinary epoxy resin-silicate cement system used in Comparative Example 1, this system, leveraging the excellent corrosion resistance and bonding strength of vinyl ester resin, combined with the micro-aggregate filling effect of steel slag powder (10-30μm) and the pozzolanic activity of fly ash, enhances the trench's resistance to corrosion. The compressive strength is increased by more than 40% (the compressive strength of Example 2 reaches 65MPa, while that of Comparative Example 1 is only 39MPa), and the impermeability pressure is doubled (1.2MPa in Example 2, compared to 0.6MPa in Comparative Example 1). In particular, after ball milling the steel slag powder for 4-6 hours, its surface active sites are significantly increased, forming a synergistic enhancement effect with nano-silica (10-50nm). Through the bridging effect of silane coupling agent KH-550 (at a dosage of 2-5% of the mass of nano-silica), the interface defects are effectively reduced, and the bending strength of the material is increased by 25-30%.

[0031] In the raw material pretreatment stage, polyacrylonitrile-based carbon fibers were modified with 5-10% nitric acid solution (50-70℃) for 30-60 minutes, which enhanced the interfacial bonding force with the resin matrix, overcoming the interfacial debonding problem caused by untreated carbon fibers in Comparative Example 1, and improving the impact resistance of the material by more than 40%. In the material mixing stage, gradient speed stirring (150-350 r / min) was used to fully activate the resin and curing agent before adding inorganic fillers to form a uniform dispersion system. Compared with the constant low speed stirring (100 r / min) used in Comparative Example 2, the mixing uniformity was improved by 30%, effectively avoiding the defect of incomplete local curing. The material was then cast into... The vacuum vibration composite process (vacuum degree 0.08-0.1MPa, vibration frequency 40-50Hz) can remove more than 90% of the air bubbles in the material. Combined with horizontal-vertical composite vibration (amplitude 1-2mm / 0.5-2mm), the density of the channel reaches more than 98%, which is significantly better than the low vacuum degree (0.05MPa) vibration process (density 82%) used in Comparative Example 2. During the curing stage, by precisely controlling the temperature (25-35℃), humidity (50-60%), and regularly spraying silane curing agent, the early cracking problem caused by insufficient curing in Comparative Example 2 was solved, and the 28-day strength retention rate was increased to more than 95%.

[0032] The semi-circular guide ridges (radius 5-10mm, spacing 20-30mm) on the inner wall of the ditch not only reduce water flow resistance (measured flow velocity increased by 15%), but their convex structure also forms mechanical reinforcing ribs. Working synergistically with the 0.2-0.5mm epoxy resin coating (ethylenediamine / diethylenetriamine cured) on the outer wall, this results in a salt spray resistance of over 5000 hours (Comparative Example 1, without coating, only 1500 hours). Comparative Example 3, lacking steel slag powder and fly ash, saw an 18% increase in material costs and a 15% decrease in compressive strength despite using the same process (Example 2: 65MPa, Comparative Example 3: 55MPa), demonstrating the dual value of industrial waste in reducing costs and improving performance. In summary, this technology, through multi-dimensional innovation in raw materials, processes, and structure, extends the service life of prefabricated drainage ditches to over 30 years (traditional products approximately 15 years), while reducing production costs by 12-15%. It possesses irreplaceable application advantages in harsh environments such as municipal engineering and chemical industrial parks.

[0033] Compressive strength test: Referring to GB / T50081-2019 "Standard for Test Methods of Physical and Mechanical Properties of Concrete", samples were taken from the drainage ditch bodies prepared in each embodiment and comparative example to make 100mm×100mm×100mm cubic test blocks; the test blocks were placed on a pressure testing machine and axial pressure was applied at a loading rate of 0.5-1.0MPa / s until the test block failed, and the maximum failure load was recorded; the compressive strength was calculated by the following formula: compressive strength = maximum failure load / bearing area of ​​the test block, and the average value of 3 test blocks was taken as the test result.

[0034] Permeability pressure test: According to GB / T50082-2009 "Standard for Test Methods of Long-Term Performance and Durability of Ordinary Concrete", a permeability meter is used for testing. Samples are taken from the trench to form cylindrical test blocks of Φ150mm×150mm. Sealing material is applied to the sides of the test blocks before they are placed in the permeability meter mold. During the test, a water pressure of 0.1MPa is applied initially, and then increased by 0.1MPa every 8 hours until water seepage is observed on the surface of 3 out of 6 test blocks. The water pressure value at this point is recorded, and this pressure value is the permeability pressure. If the pressure reaches the design permeability grade and no water seepage occurs within 8 hours, the test is stopped, and this pressure value is the permeability pressure.

[0035] Bending strength test: According to GB / T1449-2005 "Test Method for Bending Properties of Fiber Reinforced Plastics", a long strip of 80mm×10mm×4mm was prepared. The sample was placed on the support of a universal testing machine with a support span of 64mm. A load was applied to the middle of the sample at a loading rate of 2mm / min until the sample broke. The maximum load was recorded. The bending strength was calculated using the following formula: Bending strength = 3PL / (2bh) 2 (where P is the maximum load, L is the support span, b is the width of the test block, and h is the thickness of the test block), and the average value of the 5 test blocks is taken as the test result.

[0036] Impact resistance test: Refer to GB / T1451-2005 "Test Method for Impact Toughness of Fiber Reinforced Plastics by Simply Supported Beam" and use a simply supported beam impact testing machine for testing; take samples to make 80mm×10mm×4mm test blocks without notches; place the test block on the support of the testing machine and let the hammer impact the middle of the test block, and record the energy difference before and after the hammer impact. This energy difference is the impact energy absorbed by the test block; the impact strength is calculated by the following formula: Impact strength = Impact energy / Cross-sectional area of ​​the test block, and take the average value of 10 test blocks as the test result.

[0037] Mixing uniformity test: Using chemical analysis, 10 samples from different locations in the mixture were randomly selected, and the content of benzoyl peroxide in each sample was determined. The standard deviation of the benzoyl peroxide content in the 10 samples was calculated. The smaller the standard deviation, the higher the mixing uniformity. The mixing uniformity is expressed as relative standard deviation, which is calculated as (standard deviation / average value) × 100%.

[0038] Ditch body density test: The bulk density and apparent density of the test block are determined by the displacement method, and then the density is calculated. Samples are taken from the ditch body and made into regularly shaped test blocks. The mass of the test blocks is weighed using a balance. The test blocks are placed in a graduated cylinder filled with water, and the volume of the water rise is recorded. This volume is the volume of the test block (including internal pores). The test blocks are broken into particles with a diameter of less than 5 mm, and then placed in a graduated cylinder to measure their apparent volume (excluding internal pores). The density is calculated by the following formula: Density = Apparent volume / Volume × 100%.

[0039] 28-day strength retention rate test: The compressive strength of the test blocks was measured after 7 days and 28 days of curing, respectively. 28-day strength retention rate = (28-day compressive strength / 7-day compressive strength) × 100%.

[0040] Salt spray resistance test: According to GB / T10125-2021 "Artificial Atmosphere Corrosion Test - Salt Spray Test", the prepared trench body test block with anti-corrosion coating was placed in the salt spray test chamber; the salt solution used in the test was a 5% sodium chloride solution with a pH value of 6.5-7.2; the test temperature was 35℃, and the salt spray deposition rate was 1-2 mL / (h・80cm). 2 ); continuous spraying, and take out the test block every 24 hours to observe the surface condition of the coating, and record the time when corrosion phenomena such as rust and blistering appear, so as to evaluate the salt spray resistance performance.

[0041] Water flow velocity test: The test is conducted in a simulated drainage system. The drainage ditch is installed in the test device, and the inflow rate is controlled to be a constant value (determined according to the drainage ditch specifications). A flow meter is used to measure the water flow velocity at different locations (inlet, middle, and outlet) of the drainage ditch. Each location is measured 3 times, and the average value is taken as the flow velocity at that location. Finally, the average flow velocity of the entire drainage ditch is calculated.

[0042] The above descriptions are merely embodiments of the present invention, and common knowledge regarding specific technical solutions or characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A resin concrete precast drain characterized by, The ditch body is made of resin concrete material, and the resin concrete material is composed of the following components by weight: vinyl ester resin 18-25 parts, Portland cement 5-10 parts, steel slag micro powder 10-15 parts, fly ash 8-12 parts, river sand 35-50 parts, carbon fiber 2-6 parts, nano silicon dioxide 1-4 parts, benzoyl peroxide 1-2 parts, N, N-dimethyl aniline 0.3-1.5 parts.

2. The resin concrete precast gutter according to claim 1, characterized by The steel slag micro powder is obtained by ball milling the converter steel slag for 4-6 hours, and then passing through a 200-300 mesh screen to obtain a micro powder with a particle size of 10-30 microns. The fly ash is grade I fly ash, and the water requirement ratio is less than or equal to 95%, the loss on ignition is less than or equal to 5%, and the fineness is less than or equal to 12% on a 45 micron square mesh screen.

3. The resin concrete precast gutter according to claim 1, characterized by The inner side wall of the ditch body is provided with a plurality of flow guide protrusions, which are spaced along the length direction of the ditch body, and the cross section of the flow guide protrusion is semicircular with a radius of 5-10mm, and the spacing between adjacent flow guide protrusions is 20-30mm.

4. The resin concrete precast gutter according to claim 1, characterized by The carbon fiber is polyacrylonitrile-based carbon fiber, which is placed in a 5-10% nitric acid solution during surface treatment, soaked in a constant temperature water bath at 50-70°C for 30-60 minutes, then taken out and repeatedly washed with deionized water until neutral, and then placed in an oven at 80-100°C for 2-3 hours for drying.

5. The resin concrete precast gutter according to claim 1, wherein The outer wall of the ditch body is provided with an anti-corrosion coating, which is an epoxy resin coating, and the preparation method is as follows: mixing epoxy resin and curing agent in a mass ratio of 3:1, uniformly spraying on the surface of the ditch body, controlling the spraying pressure to be 0.3-0.5MPa, and the coating thickness to be 0.2-0.5mm, the curing agent is an amine curing agent, specifically ethylenediamine or diethylenetriamine.

6. The resin concrete precast gutter according to claim 1, wherein The particle size of the nano silicon dioxide is 10-50nm, and it is modified by silane coupling agent KH-550, and the amount of silane coupling agent KH-550 used in the modification process is 2-5% of the mass of nano silicon dioxide.

7. The resin concrete precast gutter according to claim 1, wherein The two ends of the ditch body are respectively provided with connecting parts, which are flange structures, and bolt holes are formed on the flange structures, the diameter of the bolt holes is 8-12mm, and the adjacent ditch bodies are connected by bolts passing through the bolt holes.

8. A production process of a resin concrete precast drain for producing the resin concrete precast drain according to any one of claims 1 to 7, characterized by, The method comprises the following steps: S1: raw material pretreatment: screen the river sand on a vibrating screen, select river sand with a particle size of 0.5-2mm, then put it into a drying oven with a temperature setting of 110-130°C, and dry for 1.5-2.5 hours; the polyacrylonitrile-based carbon fiber is placed in a 5-10% nitric acid solution, soaked in a constant temperature water bath at 50-70°C for 30-60 minutes, then taken out and repeatedly washed with deionized water until neutral, and then placed in an oven at 80-100°C for 2-3 hours for drying; S2: Material mixing: first, add the vinyl ester resin, benzoyl peroxide and N, N-dimethyl aniline into the planetary stirring device, set the stirring speed to 150-250 r / min, and stir for 3-8 minutes; then add the Portland cement, steel slag powder, fly ash and nano silicon dioxide, adjust the stirring speed to 250-350 r / min, and stir for 10-20 minutes; then add the pretreated river sand and carbon fibers, stir at a speed of 200-300 r / min, and stir for 15-25 minutes to obtain the mixed material; S3: Mould processing: prepare a steel mould matching the shape of the trench body, polish the inner wall of the mould with sandpaper to remove rust, then wipe it clean with alcohol, and after the alcohol evaporates, evenly brush polytetrafluoroethylene release agent on the inner wall of the mould, with a coating thickness of 0.05-0.1 mm; S4: Pouring, forming and curing treatment: pour the mixed material into the mould, place it in a vacuum vibration forming machine, first draw the vacuum degree to 0.08-0.1 MPa and maintain it for 1-2 minutes, then start the vibration device, set the vibration frequency to 40-50 Hz, and vibrate for 7-13 minutes for forming; transfer the formed body together with the mould to a curing chamber, keep the temperature in the curing chamber at 20-30°C, and after 12-24 hours of static curing, demould; after demoulding, place the trench body on a curing rack, continue to cure it in an environment with a temperature of 25-35°C and a relative humidity of 50-60% for 3-5 days, and evenly spray the surface of the trench body with silane curing agent once a day, the silane curing agent is specifically methyltrimethoxysilane, and the dilution ratio of the curing agent is 1:50 (silane curing agent: water) by volume; S5: Post-treatment: polish the outer wall of the cured trench body, use 200-300 mesh sandpaper for rough grinding, and then use 400-600 mesh sandpaper for fine grinding; then mix the epoxy resin and amine curing agent uniformly at a mass ratio of 3:1, evenly spray the surface of the trench body using a spraying process, control the spraying pressure to be 0.3-0.5 MPa, and the coating thickness to be 0.2-0.5 mm, the amine curing agent is specifically ethylenediamine or diethylenetriamine, and finally cure it in a curing oven at a temperature of 30-40°C for 2-4 hours to obtain the resin concrete precast drainage trench. The stirring paddle of the planetary stirring device in S2 is a double helix paddle, and the paddle diameter is 0.4-0.6 times the diameter of the stirring barrel.

9. The production process according to claim 8, characterized in that, The vibration mode of the vacuum vibration forming machine in S4 is horizontal and vertical composite vibration, the horizontal vibration amplitude is 1-2 mm, and the vertical vibration amplitude is 0.5-2 mm.

10. The production process according to claim 8, characterized in that, ​

Images