Road and bridge prefabricated part and manufacturing method thereof

Abstract

The invention provides a road bridge prefabricated part and a manufacturing method thereof, the road bridge prefabricated part comprises a concrete slab, the concrete slab comprises the following raw materials by weight: 100 parts of cement; 100 to 150 parts of gravel aggregate; 30-50 parts of steel slag; 2-4 parts of a water reducing agent; 2-4 parts of foam; and 0.5-1 part of polypropylene fiber. When the concrete prefabricated part prepared from the raw materials in the total amount is used for constructing roads and bridges, the construction period can be effectively shortened, meanwhile, the labor intensity of constructors is reduced, meanwhile, the concrete prefabricated part is better in overall strength and compactness, the overall strength of the roads and the bridges can be improved, and the service life of the roads and the bridges can be prolonged. Meanwhile, damaged parts on the surfaces of multiple roads and bridges can be conveniently repaired, and the follow-up road and bridge maintenance cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of reinforced concrete prefabricated components, and in particular to a prefabricated component for a road bridge and a manufacturing method thereof. Background Art

[0002] At present, the surface of domestic roads and bridges mainly adopts cast-in-place concrete construction technology, which requires on-site formwork, steel bar tying, concrete pouring, concrete maintenance and other construction processes. The production efficiency is low, and it requires a large amount of human resources. The construction period is long. The use of manual labor during construction leads to the quality of the road cannot be guaranteed, and it pollutes the environment. The noise generated during construction is large and affects the surrounding residents. A large amount of construction waste is generated and cannot be reused, resulting in a waste of resources.

[0003] Prefabricated components refer to steel, wood or concrete components that are prefabricated in factories or on-site according to design specifications. They are various components manufactured using pre-forming methods. With the development of society, the requirements for efficiency in road construction are gradually increasing. Therefore, prefabricated components are gradually also used in road construction.

[0004] Based on this, the present invention proposes a new prefabricated road bridge component and a manufacturing method thereof. Summary of the invention

[0005] Based on the above description, the present invention provides a prefabricated road and bridge component and a method for manufacturing the same, so as to replace the cast-in-place concrete construction process in the prior art, improve the construction efficiency of roads and bridges, and reduce the subsequent maintenance costs of roads and bridges.

[0006] The technical solution of the present invention to solve the above technical problems is as follows: In a first aspect, the present invention provides a prefabricated road bridge component, including a concrete slab, wherein the concrete slab is composed of the following raw materials by weight: 100 parts of cement; 100-150 parts of sand and gravel aggregate; 30-50 parts of steel slag; 2-4 parts of water reducing agent; Foam 2-4 portions; Polypropylene fiber 0.5-1 part.

[0007] Based on the above technical solution, the present invention can also be improved as follows.

[0008] Furthermore, the concrete slab is composed of the following raw materials in parts by weight: 100 parts of cement, 100 parts of sand and gravel aggregate, 30 parts of steel slag, 2 parts of water reducing agent, 2 parts of foam and 0.5 parts of polypropylene fiber.

[0009] Furthermore, the concrete slab is composed of the following raw materials in parts by weight: 100 parts of cement, 125 parts of sand and gravel aggregate, 40 parts of steel slag, 3 parts of water reducing agent, 3 parts of foam and 0.75 parts of polypropylene fiber.

[0010] Furthermore, the concrete slab is composed of the following raw materials in parts by weight: 100 parts of cement, 150 parts of sand and gravel aggregate, 50 parts of steel slag, 4 parts of water reducing agent, 4 parts of foam and 1 part of polypropylene fiber.

[0011] Furthermore, the sand and gravel aggregate consists of sand, crushed stone and mineral powder; Among them, the composition ratio of sand, gravel and mineral powder is 10:10:1.

[0012] Furthermore, the density of the steel slag is 10 g / cm 3 , particle size is less than 300mm.

[0013] Furthermore, the foam is prepared by stirring an animal protein foaming agent and has a density of 50-60 kg / m 3 .

[0014] Furthermore, the water reducer is a naphthalene-based high-efficiency water reducer or a polycarboxylic acid high-efficiency water reducer.

[0015] Furthermore, the length of the polypropylene fiber is 10-15 mm.

[0016] In a second aspect, the present invention provides a method for depositing the prefabricated road and bridge components as described in the first aspect, comprising the following steps: S1: Mix polypropylene fiber and cement in proportion, dry mix thoroughly, add water, and continue stirring for 3-5 minutes to obtain cement slurry; S2: Dilute the animal protein foaming agent at a ratio of 1:20 and stir at high speed for 10-15 minutes to obtain a density of 50-60 kg / m 3 of bubbles; S3: adding the foam obtained in step S2 to the cement slurry obtained in step S1 according to the proportion, stirring for 3-5 minutes, to obtain a mixed cement slurry; S4: pouring the mixed cement slurry, sand and gravel aggregate, steel slag and water reducing agent obtained in step S3 into a mixing device for stirring and mixing to prepare concrete; S5: pouring the concrete obtained in step S4 into a mold for casting and molding, and demoulding the concrete after it is dried to obtain a prefabricated road and bridge component.

[0017] Compared with the prior art, the technical solution of this application has the following beneficial technical effects: The prefabricated road and bridge components provided by the present invention have the following beneficial effects: 1. By adding a small amount of polypropylene fiber into concrete, the fiber collides and rubs against the cement, steel slag and sand and gravel aggregates in the concrete, so that the polypropylene fiber is fully opened and evenly distributed in the concrete, so that the polypropylene fiber and the concrete surface have good bonding force, and the concrete precast components are bonded into a stable whole, thereby improving the overall strength and service life of the concrete precast components. At the same time, the precast concrete components are processed by this production method, which can speed up the casting and demoulding efficiency of the precast components while ensuring the overall strength of the precast components, thereby improving the production and processing efficiency of the precast components.

[0018] 2. By mixing the foam made of animal protein foaming agent into concrete, the number of pores inside the concrete can be effectively reduced, and the pore distribution inside the concrete can be more even. Since the distance between the pore walls is far, the structure of the precast concrete components can be more compact.

[0019] 3. By mixing steel slag with a particle size of less than 300 mm into concrete, it can be combined with the added sand, gravel and mineral powder to effectively fill the gaps between cement particles, reduce the gaps in precast concrete components, improve the strength of precast components, allow precast concrete components to be formed faster, and improve the production efficiency of precast components, thereby improving the construction efficiency of roads and bridges.

[0020] 4. By using prefabricated components to construct roads and bridges, the construction period can be effectively shortened and the labor intensity of construction workers can be reduced. At the same time, the overall strength and density of prefabricated concrete components are better, which can improve the overall strength and service life of roads and bridges. At the same time, it is convenient to repair damaged areas on the surface of multiple roads and bridges, reducing the subsequent road and bridge maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A flow chart of a method for manufacturing prefabricated road and bridge components provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] The following is combined with Figure 1 The embodiments of the present invention are further described in detail with examples. The following examples are used to illustrate the present invention but cannot be used to limit the scope of the present invention.

[0025] The road bridge prefabricated component provided by the present invention comprises a concrete slab, which is composed of the following raw materials by weight: 100 parts of cement, 100-150 parts of sand and gravel aggregate, 30-50 parts of steel slag, 2-4 parts of water reducing agent, 2-4 parts of foam and 0.5-1 part of polypropylene fiber.

[0026] The crushed stone aggregate is composed of sand, crushed stone and mineral powder, and the composition ratio of sand, crushed stone and mineral powder is 10:10:1.

[0027] The steel slag has a density of 10 g / cm3 and a particle size of less than 300 mm.

[0028] The water reducer is a naphthalene-based high-efficiency water reducer or a polycarboxylic acid high-efficiency water reducer.

[0029] The foam is prepared by stirring an animal protein foaming agent and has a density of 50-60 kg / m 3 .

[0030] The length of the polypropylene fiber is 10-15 mm.

[0031] A method for manufacturing a prefabricated road bridge component, such as Figure 1 As shown, the following steps are included: S1: Weigh the required polypropylene fiber and cement, dry-mix them thoroughly, add water and continue stirring for 3-5 minutes to obtain cement slurry.

[0032] Specifically, by adding a small amount of polypropylene fiber into concrete, the fiber collides and rubs against the cement, steel slag and sand and gravel aggregates in the concrete, so that the polypropylene fiber is fully opened and evenly distributed in the concrete, so that the polypropylene fiber and the concrete surface have good bonding force, and the concrete precast components are bonded into a stable whole, thereby improving the overall strength and service life of the concrete precast components. At the same time, by processing the concrete precast components through the above-mentioned manufacturing method, the casting and demoulding efficiency of the precast components can be accelerated while ensuring the overall strength of the precast components, thereby improving the production and processing efficiency of the precast components.

[0033] S2: Dilute the animal protein foaming agent at a ratio of 1:20 and stir at high speed for 10-15 minutes using a blender to obtain a foaming agent with a density of 50-60 kg / m 3 of bubbles.

[0034] S3: Add the foam into the cement slurry according to the proportion and stir for 3-5 minutes to obtain a mixed cement slurry.

[0035] Specifically, by mixing foam made from animal protein foaming agent into concrete, the number of pores inside the concrete can be effectively reduced, and the pore distribution inside the concrete can be made more uniform. At the same time, since the distance between the pore walls is relatively far, the structure of the precast concrete components can be made denser.

[0036] S4: Pour the mixed cement slurry, sand and gravel aggregate, steel slag and water reducing agent into a mixing device for stirring and mixing to make concrete.

[0037] Specifically, by mixing steel slag with a particle size of less than 300 mm into concrete, it can be combined with the added sand, gravel and mineral powder to effectively fill the gaps between cement particles, reduce the gaps in precast concrete components, improve the strength of precast components, allow precast concrete components to be formed faster, and improve the production efficiency of precast components, thereby improving the construction efficiency of roads and bridges.

[0038] S5: pouring concrete into a mold to cast and shape the concrete, and demoulding the concrete after it dries to obtain a prefabricated road and bridge component.

[0039] In summary, the use of prefabricated components for the construction of roads and bridges can effectively shorten the construction period and reduce the labor intensity of construction workers. At the same time, the overall strength and density of prefabricated concrete components are better, which can improve the overall strength and service life of roads and bridges. At the same time, it is convenient to repair damaged areas on the surface of multiple roads and bridges, reducing the subsequent road and bridge maintenance costs.

[0040] The following is further introduced in conjunction with specific embodiments: Example 1 The present embodiment provides a prefabricated component for a road and bridge, comprising the following raw materials in parts by weight: 100 parts of cement, 100 parts of sand and gravel aggregate, 30 parts of steel slag, 2 parts of water reducing agent, 2 parts of foam and 0.5 parts of polypropylene fiber.

[0041] Among them, sand and gravel aggregate is composed of sand, crushed stone and mineral powder, and the composition ratio of sand, crushed stone and mineral powder is 10:10:1.

[0042] The density of steel slag is 10g / cm 3 , particle size is less than 300mm.

[0043] The foam is made by stirring animal protein foaming agent with a density of 50 kg / m 3 .

[0044] The water reducer is a naphthalene-based high-efficiency water reducer.

[0045] The length of the polypropylene fiber is 10 mm.

[0046] The prefabricated road bridge components are manufactured using the manufacturing method provided in the aforementioned content. For the corresponding manufacturing method, please refer to the above introduction and will not be repeated here.

[0047] The compressive strength test of the precast concrete components made by using the above-mentioned raw materials was carried out. It was found that the surface of the precast concrete components would not break until they were subjected to a pressure of 60 MPa. At the same time, there were no obvious gaps and air bubbles on the fracture surface, indicating that the overall structure of the precast concrete components was tight and strong.

[0048] Example 2 The present embodiment provides a prefabricated component for a road and bridge, comprising the following raw materials in parts by weight: 100 parts of cement, 125 parts of sand and gravel aggregate, 40 parts of steel slag, 3 parts of water reducing agent, 3 parts of foam and 0.75 parts of polypropylene fiber.

[0049] Among them, sand and gravel aggregate is composed of sand, crushed stone and mineral powder, and the composition ratio of sand, crushed stone and mineral powder is 10:10:1.

[0050] The density of steel slag is 10g / cm 3 , particle size is less than 300mm.

[0051] The foam is made by stirring animal protein foaming agent with a density of 55 kg / m 3 .

[0052] The water reducer is a polycarboxylic acid high efficiency water reducer.

[0053] The length of the polypropylene fiber is 15 mm.

[0054] The prefabricated road bridge components are manufactured using the manufacturing method provided in the aforementioned content. For the corresponding manufacturing method, please refer to the above introduction and will not be repeated here.

[0055] The compressive strength test of the precast concrete components made by using the above-mentioned raw materials was carried out. It was found that the surface of the precast concrete components would not break until they were subjected to a pressure of 65Mpa. At the same time, there were no obvious gaps and air bubbles on the fracture surface, indicating that the overall structure of the precast concrete components was tight and strong.

[0056] Example 3 The present embodiment provides a prefabricated component for a road and bridge, comprising the following raw materials in parts by weight: 100 parts of cement, 150 parts of sand and gravel aggregate, 50 parts of steel slag, 4 parts of water reducing agent, 4 parts of foam and 1 part of polypropylene fiber.

[0057] Sand and gravel aggregate is composed of sand, crushed stone and mineral powder, and the composition ratio of sand, crushed stone and mineral powder is 10:10:1.

[0058] The density of steel slag is 10g / cm 3 , particle size is less than 300mm.

[0059] The foam is made by stirring animal protein foaming agent with a density of 60 kg / m 3 .

[0060] The water reducer is a naphthalene-based high-efficiency water reducer.

[0061] The length of the polypropylene fiber is 15 mm.

[0062] The prefabricated road bridge components are manufactured using the manufacturing method provided in the aforementioned content. For the corresponding manufacturing method, please refer to the above introduction and will not be repeated here.

[0063] The compressive strength test of the precast concrete components made by using the above-mentioned raw materials was carried out. It was found that the surface of the precast concrete components would not break until they were subjected to a pressure of 65Mpa. At the same time, there were no obvious gaps and air bubbles on the fracture surface, indicating that the overall structure of the precast concrete components was tight and strong.

[0064] In summary, it can be seen from the above-mentioned multiple embodiments that the precast concrete components made from the total amount of component raw materials have better compressive resistance and overall strength than the existing road bridge decks, and are convenient for transportation and construction, and can effectively improve the construction efficiency of roads and bridges.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A prefabricated component for a road or bridge, characterized in that: The invention comprises a concrete slab, wherein the concrete slab is composed of the following raw materials by weight: 100 parts of cement; 100-150 parts of sand and gravel aggregate; 30-50 parts of steel slag; 2-4 parts of water reducing agent; Foam 2-4 portions; Polypropylene fiber 0.5-1 part.

2. The prefabricated road and bridge component according to claim 1 is characterized in that: The concrete slab is composed of the following raw materials in parts by weight: 100 parts of cement, 100 parts of sand and gravel aggregate, 30 parts of steel slag, 2 parts of water reducing agent, 2 parts of foam and 0.5 parts of polypropylene fiber.

3. The prefabricated road and bridge component according to claim 1 is characterized in that: The concrete slab is composed of the following raw materials in parts by weight: 100 parts of cement, 125 parts of sand and gravel aggregate, 40 parts of steel slag, 3 parts of water reducing agent, 3 parts of foam and 0.75 parts of polypropylene fiber.

4. The prefabricated road and bridge component according to claim 1, characterized in that: The concrete slab is composed of the following raw materials in parts by weight: 100 parts of cement, 150 parts of sand and gravel aggregate, 50 parts of steel slag, 4 parts of water reducing agent, 4 parts of foam and 1 part of polypropylene fiber.

5. The prefabricated road bridge component according to any one of claims 1 to 4, characterized in that: The sand and gravel aggregate consists of sand, crushed stone and mineral powder; Among them, the composition ratio of sand, gravel and mineral powder is 10:10:

1.

6. The prefabricated road and bridge component according to any one of claims 1 to 4, characterized in that: The density of the steel slag is 10 g / cm 3 , particle size is less than 300mm.

7. The prefabricated road and bridge component according to any one of claims 1 to 4, characterized in that: The foam is prepared by stirring an animal protein foaming agent and has a density of 50-60 kg / m 3 .

8. The prefabricated road and bridge component according to any one of claims 1 to 4, characterized in that: The water reducer is a naphthalene-based high-efficiency water reducer or a polycarboxylic acid high-efficiency water reducer.

9. The prefabricated road and bridge component according to any one of claims 1 to 4, characterized in that: The length of the polypropylene fiber is 10-15 mm.

10. A method for manufacturing a prefabricated road bridge component according to any one of claims 1 to 9, characterized in that: The steps include: S1: Mix polypropylene fiber and cement in proportion, dry mix thoroughly, add water, and continue stirring for 3-5 minutes to obtain cement slurry; S2: Dilute the animal protein foaming agent at a ratio of 1:20 and stir at high speed for 10-15 minutes to obtain a density of 50-60 kg / m 3 of bubbles; S3: adding the foam obtained in step S2 to the cement slurry obtained in step S1 according to the proportion, stirring for 3-5 minutes, to obtain a mixed cement slurry; S4: pouring the mixed cement slurry, sand and gravel aggregate, steel slag and water reducing agent obtained in step S3 into a mixing device for stirring and mixing to prepare concrete; S5: pouring the concrete obtained in step S4 into a mold for casting and molding, and demoulding the concrete after it is dried to obtain a prefabricated road and bridge component.

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