A highway roadbed composite material and roadbed manufacturing method

Abstract

A highway roadbed composite material and a roadbed manufacturing method, belonging to the technical field of highway construction, the present invention provides a highway roadbed composite material comprising: a base layer, composed of oil shale waste residue, slag, crushed stone and fly ash; a cold-resistant layer compounded on the base layer, composed of impact-resistant polystyrene, water reducer and quicklime; a wear-resistant layer compounded on the cold-resistant layer, composed of waste rubber, carbon black and additives. The roadbed manufactured by the present invention has the characteristics of cold resistance and wear resistance, excellent low-temperature impact resistance, low manufacturing cost, and energy-saving and environmental protection, meeting the requirements of highway roadbed design specifications and the strength and deformation requirements of highway roadbeds. In addition, the roadbed manufactured by the present invention has a long service life, is safe and reliable to use, has a wide range of applications, and has a simple manufacturing process without the need for large-scale equipment.

Description

Technical Field

[0001] The invention belongs to the technical field of highway construction, and in particular relates to a highway roadbed composite material and a roadbed manufacturing method. Background Art

[0002] As the foundation of the highway, the roadbed is mainly built with soil or stone, and is a strip structure with a certain thickness. Based on the material, the roadbed can be divided into soil roadbed, stone roadbed and soil-stone roadbed.

[0003] At present, the existing roadbed materials are mainly made of some basic materials such as waste residue, slag, gravel, etc. This type of roadbed material only meets the most basic roadbed requirements, but does not meet some requirements in special circumstances, such as wear resistance and cold resistance. In addition, this type of roadbed material has poor low-temperature impact resistance and its service life will be greatly shortened. Therefore, the roadbed prepared with this type of roadbed material cannot be used in cold areas and on roads with high wear resistance requirements. Summary of the invention

[0004] In order to solve the problems existing in the prior art, the present invention provides a highway roadbed composite material and a roadbed manufacturing method.

[0005] The technical solution adopted by the present invention to solve the technical problem is as follows:

[0006] The present invention provides a highway subgrade composite material, comprising:

[0007] a base layer consisting of oil shale waste, slag, crushed stone and fly ash;

[0008] The cold-resistant layer compounded on the base layer is composed of high-impact polystyrene, water-reducing agent and quicklime;

[0009] The wear-resistant layer compounded on the cold-resistant layer is composed of waste rubber, carbon black and additives.

[0010] Preferably, the mass ratio of the oil shale waste residue, slag, crushed stone and fly ash is (5-10):(1-3):(2-5):(3-6).

[0011] Preferably, the mass ratio of the high-impact polystyrene, the water reducing agent and the quicklime is (3-6):(0.5-1.5):(1-2).

[0012] Preferably, the water reducing agent is composed of cis-2-butenoic acid, sodium propylene sulfonate, ester type polyether monomer, peracetic acid, ethanol and water.

[0013] Preferably, the mass ratio of cis-2-butenoic acid, sodium propylene sulfonate, ester-type polyether monomer, peracetic acid, ethanol and water is (1-3):(2-4):(3-6):(6-9):(5-10):(2.5-3.5).

[0014] Preferably, the mass ratio of the waste rubber, carbon black and additive is (10-15):(3-5):(2-6).

[0015] Preferably, the auxiliary agent is a polyethylene homopolymer or a polyethylene copolymer.

[0016] The present invention provides a method for making a roadbed, which is prepared by using the above-mentioned highway roadbed composite material. The method comprises the following steps:

[0017] S1, synthetic base layer material;

[0018] According to the mass ratio of oil shale waste residue, slag, crushed stone and fly ash (5-10):(1-3):(2-5):(3-6), the oil shale waste residue, slag, crushed stone and fly ash are uniformly mixed at room temperature to obtain a base layer material;

[0019] S2, synthetic cold-resistant layer material;

[0020] According to the mass ratio of high-impact polystyrene, water reducing agent and quicklime (3-6): (0.5-1.5): (1-2), high-impact polystyrene, water reducing agent and quicklime are uniformly mixed at room temperature to obtain a cold-resistant layer material;

[0021] S3, synthetic wear-resistant layer material;

[0022] According to the mass ratio of waste rubber, carbon black and additives (10-15):(3-5):(2-6), the waste rubber, carbon black and additives are mixed uniformly at 160-190° C. to obtain a wear-resistant layer material;

[0023] S4, making roadbed;

[0024] Take the above-prepared base layer material and prepare it into a base layer with a thickness of 30-40cm; on the basis of the base layer, evenly cover the cold-resistant layer material on the base layer to prepare a cold-resistant layer with a thickness of 20-29cm; on the basis of the cold-resistant layer, evenly cover the wear-resistant layer material on the cold-resistant layer to prepare a wear-resistant layer with a thickness of 10-19cm, thereby obtaining a roadbed.

[0025] Preferably, the preparation method of the water reducing agent is as follows:

[0026] Weigh the raw materials according to the mass ratio of cis-2-butenoic acid, sodium propylene sulfonate, ester type polyether monomer, peracetic acid, ethanol and water (1-3):(2-4):(3-6):(6-9):(5-10):(2.5-3.5); then add sodium propylene sulfonate and ester type polyether monomer into water and stir evenly, add peracetic acid thereto to react for 0.8-1.5 hours, then add cis-2-butenoic acid and ethanol in sequence to react for 0.5-1 hour, and keep warm at 90-120° C. for 1-2 hours to obtain a water reducer.

[0027] The beneficial effects of the present invention are:

[0028] The highway roadbed composite material and the roadbed made of the highway roadbed composite material of the present invention have the characteristics of cold resistance and wear resistance, excellent low-temperature impact resistance, low production cost, and energy conservation and environmental protection. They meet the requirements of highway roadbed design specifications and the strength and deformation requirements of highway roadbeds. In addition, the roadbed made by the present invention has a long service life, is safe and reliable to use, has a wide range of applications, and has a simple production process without the need for large-scale equipment.

[0029] The present invention is a roadbed made of a highway roadbed composite material. Through testing, it can be known that the 7d unconfined compressive strength of the roadbed is greater than 2.1MPa, the 28d rebound modulus is 654MPa, and the 28d tensile strength is 0.66MPa, which can achieve good cold resistance and wear resistance. DETAILED DESCRIPTION

[0030] The present invention provides a highway roadbed composite material, which mainly comprises: a base layer material, a cold-resistant layer material and a wear-resistant layer material.

[0031] Among them, the base layer material is preferably composed of oil shale waste, slag, crushed stone and fly ash; the cold-resistant layer is compounded on the base layer, and the cold-resistant layer material is preferably composed of impact-resistant polystyrene, water reducer and quicklime; the wear-resistant layer is compounded on the cold-resistant layer, and the wear-resistant layer material is preferably composed of waste rubber, carbon black and additives.

[0032] Among them, the mass ratio of oil shale waste residue, slag, crushed stone and fly ash is preferably (5-10):(1-3):(2-5):(3-6).

[0033] Among them, the mass ratio of high-impact polystyrene, water reducer and quicklime is preferably (3-6):(0.5-1.5):(1-2).

[0034] Among them, the water reducing agent is preferably composed of cis-2-butenoic acid, sodium propylene sulfonate, ester type polyether monomer, peracetic acid, ethanol and water.

[0035] Among them, the mass ratio of cis-2-butenoic acid, sodium propylene sulfonate, ester type polyether monomer, peracetic acid, ethanol and water is preferably (1-3):(2-4):(3-6):(6-9):(5-10):(2.5-3.5).

[0036] Among them, the mass ratio of waste rubber, carbon black and additives is preferably (10-15):(3-5):(2-6).

[0037] Among them, the auxiliary agent is preferably a polyethylene homopolymer or a polyethylene copolymer.

[0038] In the present invention, the base layer material as the base material of the roadbed can ensure the seismic resistance and hardness of the roadbed and play a supporting role. In addition, the base layer is made of oil shale waste residue, slag, crushed stone and fly ash, which can also save resources and avoid environmental pollution.

[0039] In addition, the cold-resistant layer material is composed of high-impact polystyrene, water-reducing agent and quicklime, wherein high-impact polystyrene (HIPS) is cheap, easy to process and has good ultra-high impact strength performance. However, high-impact polystyrene (HIPS) contains 15% rubber material, so its fluidity is limited to a certain extent, and its cooling rate is slow. Considering that it may extend the construction period, in order to solve the problem of limited fluidity of high-impact polystyrene (HIPS), the present invention adds a water-reducing agent to increase the fluidity of high-impact polystyrene (HIPS), and quicklime is added to increase the reaction rate, further increase the cooling rate of high-impact polystyrene (HIPS), shorten the roadbed preparation time, reduce the preparation cost, and greatly reduce the deformation and shrinkage in the roadbed production process by increasing the reaction rate, thereby improving the roadbed quality.

[0040] In the present invention, the wear-resistant layer material is preferably made of waste rubber, carbon black and an additive, and the additive is preferably a polyethylene homopolymer or a polyethylene copolymer. The use of waste rubber can further achieve the purpose of energy saving and environmental protection. At the same time, the use of the additive can improve the dispersibility between carbon black and waste rubber, accelerate the chemical reaction between carbon black and waste rubber, shorten the roadbed production time, and in addition, the additive can also improve the fluidity of the waste rubber and increase the reaction rate.

[0041] The present invention provides a roadbed manufacturing method, which is prepared by using the above-mentioned highway roadbed composite material. The manufacturing method specifically comprises the following steps:

[0042] S1, synthetic base layer material;

[0043] According to the mass ratio of oil shale waste residue, slag, crushed stone and fly ash (5-10):(1-3):(2-5):(3-6), the oil shale waste residue, slag, crushed stone and fly ash are uniformly mixed at room temperature to obtain the base layer material.

[0044] In the present invention, the base layer material as the base material of the roadbed can ensure the seismic resistance and hardness of the roadbed and play a supporting role. In addition, the base layer is made of oil shale waste residue, slag, crushed stone and fly ash, which can also save resources and avoid environmental pollution.

[0045] S2, synthetic cold-resistant layer material;

[0046] According to the mass ratio of high-impact polystyrene, water reducing agent and quicklime (3-6):(0.5-1.5):(1-2), high-impact polystyrene, water reducing agent and quicklime are uniformly mixed at room temperature to obtain a cold-resistant layer material.

[0047] In the present invention, the cold-resistant layer material is composed of high-impact polystyrene, water-reducing agent and quicklime, wherein high-impact polystyrene (HIPS) is cheap, easy to process and has good ultra-high impact strength performance. However, high-impact polystyrene (HIPS) contains 15% of rubber material, so its fluidity is limited to a certain extent, and its cooling speed is slow. Considering that it may extend the construction period, in order to solve the problem of limited fluidity of high-impact polystyrene (HIPS), the present invention adds a water-reducing agent to increase the fluidity of high-impact polystyrene (HIPS), and quicklime is added to increase the reaction rate, further increase the cooling rate of high-impact polystyrene (HIPS), shorten the roadbed preparation time, reduce the preparation cost, and greatly reduce the deformation and shrinkage in the roadbed manufacturing process by increasing the reaction rate, thereby improving the roadbed quality.

[0048] S3, synthetic wear-resistant layer material;

[0049] According to the mass ratio of waste rubber, carbon black and additives (10-15):(3-5):(2-6), the waste rubber, carbon black and additives are uniformly mixed at 160-190° C. to obtain the wear-resistant layer material.

[0050] In the present invention, the wear-resistant layer material is preferably made of waste rubber, carbon black and an additive, and the additive is preferably a polyethylene homopolymer or a polyethylene copolymer. The use of waste rubber can further achieve the purpose of energy saving and environmental protection. At the same time, the use of the additive can improve the dispersibility between carbon black and waste rubber, accelerate the chemical reaction between carbon black and waste rubber, shorten the roadbed production time, and in addition, the additive can also improve the fluidity of the waste rubber and increase the reaction rate.

[0051] S4, making roadbed;

[0052] Take the above-prepared base layer material and prepare it into a base layer with a thickness of 30-40cm; on the basis of the base layer, evenly cover the cold-resistant layer material on the base layer to prepare a cold-resistant layer with a thickness of 20-29cm; on the basis of the cold-resistant layer, evenly cover the wear-resistant layer material on the cold-resistant layer to prepare a wear-resistant layer with a thickness of 10-19cm, thereby obtaining a roadbed.

[0053] The preparation method of the water reducing agent is as follows:

[0054] Weigh the raw materials according to the mass ratio of cis-2-butenoic acid, sodium propylene sulfonate, ester type polyether monomer, peracetic acid, ethanol and water (1-3):(2-4):(3-6):(6-9):(5-10):(2.5-3.5); then add sodium propylene sulfonate and ester type polyether monomer into water and stir evenly, add peracetic acid thereto to react for 0.8-1.5 hours, then add cis-2-butenoic acid and ethanol in sequence to react for 0.5-1 hour, and keep warm at 90-120° C. for 1-2 hours to obtain a water reducer.

[0055] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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 making creative work are within the scope of protection of the present invention.

[0056] Example 1 Roadbed Production

[0057] In this embodiment, the base layer is composed of oil shale waste, slag, crushed stone and fly ash in a mass ratio of 7:2:3:4; the cold-resistant layer is composed of high-impact polystyrene, water reducer and quicklime in a mass ratio of 4:1:1.5; the cold-resistant layer is composed of waste rubber, carbon black and additives in a mass ratio of 12:4:4.

[0058] When making the roadbed, oil shale waste residue, slag, crushed stone and fly ash are mixed evenly at room temperature to obtain a base layer; impact-resistant polystyrene, water reducer and quicklime are mixed evenly at room temperature to obtain a cold-resistant layer; waste rubber, carbon black and additives are mixed evenly at 186°C to obtain a wear-resistant layer; the above-prepared base layer materials are taken and prepared into a base layer with a thickness of 35m; on the basis of the base layer, the cold-resistant layer materials are evenly covered on the base layer to prepare a cold-resistant layer with a thickness of 25cm; on the basis of the cold-resistant layer, the wear-resistant layer materials are evenly covered on the cold-resistant layer to prepare a wear-resistant layer with a thickness of 15m, thereby obtaining the roadbed.

[0059] After testing, it can be known that the roadbed prepared in this embodiment can meet the requirements of road technical standards. The 7d unconfined compressive strength of the obtained roadbed is greater than 2.1MPa, the 28d rebound modulus is 654MPa, and the 28d tensile strength is 0.66MPa, which can achieve good cold resistance and wear resistance.

[0060] Example 2 Roadbed Production

[0061] In this embodiment, the base layer is composed of oil shale waste, slag, crushed stone and fly ash in a mass ratio of 5:3:2:5; the cold-resistant layer is composed of impact-resistant polystyrene, water reducer and quicklime in a mass ratio of 6:0.5:1.5; the cold-resistant layer is composed of waste rubber, carbon black and additives in a mass ratio of 11:4:5.

[0062] When making the roadbed, oil shale waste residue, slag, crushed stone and fly ash are mixed evenly at room temperature to obtain a base layer; impact-resistant polystyrene, water reducer and quicklime are mixed evenly at room temperature to obtain a cold-resistant layer; waste rubber, carbon black and additives are mixed evenly at 160°C to obtain a wear-resistant layer; the above-prepared base layer materials are taken and prepared into a base layer with a thickness of 35 cm; on the basis of the base layer, the cold-resistant layer materials are evenly covered on the base layer to prepare a cold-resistant layer with a thickness of 26 cm; on the basis of the cold-resistant layer, the wear-resistant layer materials are evenly covered on the cold-resistant layer to prepare a wear-resistant layer with a thickness of 10 cm, thereby obtaining the roadbed.

[0063] After testing, it can be known that the roadbed prepared in this embodiment can meet the requirements of road technical standards. The 7d unconfined compressive strength of the obtained roadbed is greater than 2.0MPa, the 28d rebound modulus is 650MPa, and the 28d tensile strength is 0.65MPa, which can achieve good cold resistance and wear resistance.

[0064] Example 3 Roadbed Production

[0065] In this embodiment, the base layer is composed of oil shale waste, slag, crushed stone and fly ash in a mass ratio of 10:1:2:6; the cold-resistant layer is composed of high-impact polystyrene, water reducer and quicklime in a mass ratio of 4:1:1; the cold-resistant layer is composed of waste rubber, carbon black and additives in a mass ratio of 15:4:3.

[0066] When making the roadbed, oil shale waste residue, slag, crushed stone and fly ash are mixed evenly at room temperature to obtain a base layer; impact-resistant polystyrene, water reducer and quicklime are mixed evenly at room temperature to obtain a cold-resistant layer; waste rubber, carbon black and additives are mixed evenly at 190°C to obtain a wear-resistant layer; the above-prepared base layer materials are taken and prepared into a base layer with a thickness of 40 cm; on the basis of the base layer, the cold-resistant layer materials are evenly covered on the base layer to prepare a cold-resistant layer with a thickness of 20 cm; on the basis of the cold-resistant layer, the wear-resistant layer materials are evenly covered on the cold-resistant layer to prepare a wear-resistant layer with a thickness of 10 cm, thereby obtaining the roadbed.

[0067] After testing, it can be known that the roadbed prepared in this embodiment can meet the requirements of road technical standards. The 7d unconfined compressive strength of the obtained roadbed is greater than 2.1MPa, the 28d rebound modulus is 651MPa, and the 28d tensile strength is 0.64MPa, which can achieve good cold resistance and wear resistance.

[0068] Example 4 Roadbed Production

[0069] In this embodiment, the base layer is composed of oil shale waste, slag, crushed stone and fly ash in a mass ratio of 7:1.5:5:4; the cold-resistant layer is composed of high-impact polystyrene, water reducer and quicklime in a mass ratio of 3:0.5:1.5; the cold-resistant layer is composed of waste rubber, carbon black and additives in a mass ratio of 15:4:3.

[0070] When making the roadbed, oil shale waste residue, slag, crushed stone and fly ash are mixed evenly at room temperature to obtain a base layer; impact-resistant polystyrene, water reducer and quicklime are mixed evenly at room temperature to obtain a cold-resistant layer; waste rubber, carbon black and additives are mixed evenly at 170°C to obtain a wear-resistant layer; the above-prepared base layer materials are taken and prepared into a base layer with a thickness of 39m; on the basis of the base layer, the cold-resistant layer materials are evenly covered on the base layer to prepare a cold-resistant layer with a thickness of 20cm; on the basis of the cold-resistant layer, the wear-resistant layer materials are evenly covered on the cold-resistant layer to prepare a wear-resistant layer with a thickness of 13cm, thereby obtaining the roadbed.

[0071] After testing, it can be known that the roadbed prepared in this embodiment can meet the requirements of road technical standards. The 7d unconfined compressive strength of the obtained roadbed is greater than 2.1MPa, the 28d rebound modulus is 652MPa, and the 28d tensile strength is 0.63MPa, which can achieve good cold resistance and wear resistance.

[0072] The present invention discloses a highway roadbed composite material and a roadbed manufacturing method. Those skilled in the art can refer to the content of this article and appropriately improve the process parameters to achieve the desired effect. It should be particularly noted that all similar substitutions and modifications are obvious to those skilled in the art and are considered to be included in the present invention. The product of the present invention has been described through preferred embodiments, and relevant personnel can obviously modify or appropriately change and combine the product described herein without departing from the content, spirit and scope of the present invention to implement and apply the technology of the present invention.

Claims

1. A highway roadbed composite material, characterized in that: include: a base layer consisting of oil shale waste, slag, crushed stone and fly ash; The cold-resistant layer compounded on the base layer is composed of high-impact polystyrene, water-reducing agent and quicklime; The wear-resistant layer compounded on the cold-resistant layer is composed of waste rubber, carbon black and additives; The mass ratio of the oil shale waste residue, slag, crushed stone and fly ash is (5-10): (1-3): (2-5): (3-6); The mass ratio of the impact-resistant polystyrene, the water reducing agent and the quicklime is (3-6): (0.5-1.5): (1-2); The water reducing agent is composed of cis-2-butenoic acid, sodium propylene sulfonate, ester type polyether monomer, peracetic acid, ethanol and water; The mass ratio of cis-2-butenoic acid, sodium propylene sulfonate, ester type polyether monomer, peracetic acid, ethanol and water is (1-3): (2-4): (3-6): (6-9): (5-10): (2.5-3.5); The mass ratio of the waste rubber, carbon black and additive is (10-15): (3-5): (2-6); The auxiliary agent is a polyethylene homopolymer or a polyethylene copolymer.

2. A roadbed manufacturing method, characterized in that: The highway subgrade composite material is prepared by the method according to claim 1, and the preparation method comprises the following steps: S1, synthetic base layer material; According to the mass ratio of oil shale waste residue, slag, crushed stone and fly ash (5-10): (1-3): (2-5): (3-6), the oil shale waste residue, slag, crushed stone and fly ash are uniformly mixed at room temperature to obtain a base layer material; S2, synthetic cold-resistant layer material; According to the mass ratio of high-impact polystyrene, water reducing agent and quicklime (3-6): (0.5-1.5): (1-2), high-impact polystyrene, water reducing agent and quicklime are uniformly mixed at room temperature to obtain a cold-resistant layer material; S3, synthetic wear-resistant layer material; According to the mass ratio of waste rubber, carbon black and additives (10-15): (3-5): (2-6), the waste rubber, carbon black and additives are mixed uniformly at 160-190° C. to obtain a wear-resistant layer material; S4, making roadbed; Take the prepared base layer material and prepare it into a base layer with a thickness of 30-40cm; on the basis of the base layer, evenly cover the cold-resistant layer material on the base layer to prepare a cold-resistant layer with a thickness of 20-29cm; on the basis of the cold-resistant layer, evenly cover the wear-resistant layer material on the cold-resistant layer to prepare a wear-resistant layer with a thickness of 10-19cm, thereby obtaining a roadbed.

3. A roadbed manufacturing method according to claim 2, characterized in that: The preparation method of the water reducing agent is as follows: Weigh the raw materials according to the mass ratio of cis-2-butenoic acid, sodium propylene sulfonate, ester type polyether monomer, peracetic acid, ethanol and water (1-3): (2-4): (3-6): (6-9): (5-10): (2.5-3.5); then add sodium propylene sulfonate and ester type polyether monomer into water and stir evenly, add peracetic acid thereto and react for 0.8-1.5 hours, then add cis-2-butenoic acid and ethanol in sequence and react for 0.5-1 hour, keep warm at 90-120°C for 1-2 hours to obtain a water reducer.