Emulsified rubber asphalt material as well as preparation method and production system thereof

Abstract

The invention relates to the technical field of emulsified rubber asphalt, and particularly discloses an emulsified rubber asphalt material as well as a preparation method and a production system thereof. The emulsified rubber asphalt material comprises 50 to 60 parts of rubber asphalt, 38 to 50 parts of a mixed emulsion and 0.2 to 0.4 part of an auxiliary agent, the mixed emulsion comprises a compound stabilizer and a compound emulsifier, and the auxiliaries comprise coal tar pitch and naphtha. The compound emulsifier is used for emulsifying rubber asphalt, and the compound stabilizer can improve the stability and constructability of the emulsified rubber asphalt material; and the auxiliary agent can improve the uniformity and adhesion of the emulsified rubber asphalt material, is beneficial to improving the adhesion among aggregate particles, enhances the interlayer bonding strength of a pavement structure, and ensures the stability of the pavement structure. By limiting the ratio of the raw materials, the synergistic interaction among the raw materials is realized, the uniform dispersity and the emulsification stability of the emulsified rubber asphalt material are improved, the preparation cost is reduced, and the emulsified rubber asphalt material has a relatively good market application value.

Description

Technical Field

[0001] The present invention relates to the technical field of emulsified rubber asphalt, and in particular to an emulsified rubber asphalt material, a preparation method thereof and a production system. Background Art

[0002] Emulsified rubber asphalt is a viscous rubber-modified asphalt (abbreviated as rubber asphalt) that is dispersed in water containing an emulsifier in the form of fine droplets through heat fusion and mechanical shearing, forming an oil-in-water (O / W) type rubber asphalt emulsion. The emulsifier reduces the surface tension during the emulsification of rubber asphalt, liquefying it into a building material with lower viscosity and better fluidity at normal temperature. As an environmentally friendly, energy-saving and easy-to-construct road building material, emulsified rubber asphalt can be used at normal temperature or together with cold and wet stone materials. Emulsified rubber asphalt not only reduces energy consumption and environmental pollution, but also improves construction efficiency, and is especially suitable for the maintenance, repair, slurry seal and bonding layer of old road surfaces in road construction.

[0003] Emulsified rubber asphalt can first modify the asphalt with rubber and then emulsify the rubber asphalt, or first emulsify the asphalt and then modify the emulsified asphalt with rubber. To improve the emulsification effect and thus enhance the stability and mechanical properties of emulsified rubber asphalt, the prior art generally adds nano materials or carbon fiber modified materials to the raw materials; or adopts a multi-stage shear dispersion technology to reduce the particle size of the dispersed phase (rubber asphalt) and improve the dispersion effect and production efficiency. However, the prior art has not studied the problems such as high emulsification difficulty of rubber asphalt and poor stability of the finished product after emulsification, and there are problems such as complex process, high energy consumption and environmental pollution. Therefore, there is an urgent need to develop an emulsified rubber asphalt with high emulsification stability at present, make full use of the advantages of emulsified asphalt and rubber asphalt to improve the material properties, reduce the production cost and reduce environmental pollution, so as to meet the requirements of the road construction and maintenance fields for high-performance and environmentally friendly asphalt materials. Summary of the Invention

[0004] Aiming at the problems such as high emulsification difficulty of rubber asphalt and poor stability of the finished product after emulsification, the present invention provides an emulsified rubber asphalt material, a preparation method thereof and a production system. Through the design of each raw material component, the uniform dispersion and emulsification stability of the emulsified rubber asphalt are greatly improved, which is beneficial to improving the bonding effect of the emulsified rubber asphalt as a tack coat on the upper and lower road surface layers, thus ensuring the stability of the road surface structure.

[0005] To solve the above technical problems, the technical solution provided by the present invention is: In the first aspect, the present invention provides an emulsified rubber asphalt material, which comprises the following raw materials in parts by mass: 50 parts to 60 parts of rubber asphalt, 38 parts to 50 parts of mixed emulsion, and 0.2 parts to 0.4 parts of auxiliary agent; The mixed emulsion includes a composite stabilizer and a composite emulsifier, and the auxiliary agent includes coal tar pitch and naphtha.

[0006] Compared with the prior art, the emulsified rubber asphalt material provided by the present invention shows excellent performance in terms of elasticity, crack resistance, temperature stability, durability, water damage resistance, skid resistance, environmental protection, noise reduction, construction performance, and economic benefits, and is widely used in projects such as high-grade highways and airport runways; the composite emulsifier is used to emulsify the rubber asphalt, and the composite stabilizer can improve the stability and workability of the emulsified rubber asphalt material; the auxiliary agent can further increase the uniformity and adhesion of the emulsified rubber asphalt material, which is beneficial to improving the adhesion strength between the emulsified rubber asphalt material and the stone materials of the upper and lower pavement layers, improving the mechanical properties of the emulsified rubber asphalt mixture, thereby ensuring the stability of the pavement structure and effectively avoiding environmental pollution. The viscosity of coal tar pitch is relatively large, and naphtha needs to be compounded and added to adjust the viscosity of the auxiliary agent to make it easier to emulsify.

[0007] By defining the ratio of each raw material, the present invention realizes the synergistic effect between the raw materials, improves the uniform dispersion and emulsification stability of the emulsified rubber asphalt material, reduces the preparation cost, and has good market application value.

[0008] Preferably, the rubber asphalt includes matrix asphalt and desulfurized rubber with a mass ratio of (70~80):(14~30).

[0009] By limiting the dosages of the matrix asphalt and the desulfurized rubber, the present invention can further adapt to the application effect of the emulsified rubber asphalt material in road construction, improve its mechanical properties, and at the same time reduce the emulsification difficulty.

[0010] Exemplarily, the matrix asphalt is petroleum asphalt of grade A-70 or A-90.

[0011] Exemplarily, the desulfurized rubber can be desulfurized waste tire powder.

[0012] Vulcanized rubber is a polymer material with a three-dimensional network structure and cannot be emulsified. In order to facilitate emulsification, it is necessary to destroy the three-dimensional network structure and reduce the molecular weight. Therefore, it is necessary to desulfurize and activate the rubber to break the sulfur bonds of the vulcanized rubber.

[0013] More preferably, the particle size of the desulfurized rubber is 40 mesh to 80 mesh.

[0014] Preferably, the preparation method of the rubber asphalt includes the following steps: After melting the matrix asphalt, add the desulfurized rubber and mix well, then disperse and develop to obtain the rubber asphalt.

[0015] Exemplarily, the preparation method of the rubber asphalt is carried out in a colloid mill.

[0016] More preferably, the temperature of the melting is 170°C to 180°C.

[0017] More preferably, the stirring speed for dispersion is 4000 rpm to 6000 rpm, the dispersion temperature is 170°C to 180°C, and the dispersion time is 60 min to 240 min (more preferably 120 min to 200 min).

[0018] More preferably, the temperature for development is 170°C to 180°C, the stirring rate is 4000 rpm to 6000 rpm, and the development time is 40 min to 60 min.

[0019] Preferably, the ductility of the rubber asphalt at 5 cm / min and 5°C is ≥20 cm, the penetration is 40 - 80 (0.1 mm), the softening point is ≥55°C, and the apparent viscosity at 180°C is 1 Pa·s to 4 Pa·s.

[0020] Preferably, the mixed emulsion comprises the following components in parts by mass: 0.1 part to 0.4 part of a composite stabilizer, 0.6 part to 1 part of a composite emulsifier, and 38 parts to 48.5 parts of water.

[0021] Preferably, the composite stabilizer comprises a water-soluble polymer, an organic solvent, a cellulose derivative, an organically modified layered silicate, and an inorganic salt.

[0022] More preferably, the composite stabilizer comprises polyvinyl alcohol, solvent oil, hydroxycellulose, organophilic montmorillonite, and calcium chloride in a mass ratio of (5 - 15):(15 - 25):(5 - 15):(5 - 15):(40 - 70).

[0023] Polyvinyl alcohol (PVA) has the functions of reducing the oil-water interfacial tension and thickening, can form a protective film on the surface of the rubber asphalt, prevent particle agglomeration, improve the viscosity and adhesion of the emulsified rubber asphalt material, and facilitate construction; calcium chloride has an electrolyte stabilizing effect, can promote the demulsification of the emulsified rubber asphalt material after construction, improve its adhesion to the base material, and can also lower the freezing point of water and enhance the stability of the emulsified rubber asphalt material at low temperatures; hydroxycellulose and organophilic montmorillonite both have the characteristics of anti-settling, strong adsorption, and good dispersion, which are beneficial to improving the high-temperature performance and temperature stability of the emulsified rubber asphalt material; solvent oil can improve the colloidal structure of the matrix asphalt, increase the content of saturated components, and is beneficial to enhancing the stability of the oil-water interfacial film. By limiting the dosage of each component of the composite stabilizer in the present invention, the synergistic effect of each component is better exerted, and the stability and constructability of the emulsified rubber asphalt material are further improved.

[0024] Further preferably, the mass ratio of polyvinyl alcohol, solvent oil, hydroxycellulose, organic montmorillonite and calcium chloride is (8 - 12):(8 - 12):(18 - 22):(8 - 12):(50 - 60).

[0025] Further preferably, the solvent oil includes at least one of kerosene or diesel oil.

[0026] Preferably, the composite emulsifier includes a nonionic surfactant and a cationic surfactant.

[0027] Further preferably, the nonionic surfactant includes octylphenol polyoxyethylene ether.

[0028] Further preferably, the cationic surfactant includes cetyltrimethylammonium bromide.

[0029] Further preferably, the mass ratio of the nonionic surfactant to the cationic surfactant is (1 - 2):(2.5 - 3).

[0030] The nonionic surfactant has good thermal stability and low surface tension, but there are problems such as many vacancies at the oil - water interface and loose interfacial film; the cationic surfactant has good emulsifying effect and can effectively enhance the charge density at the interface, but has deficiencies such as poor thermal stability. In the present invention, the two emulsifiers are used in combination according to a specific ratio, which can take into account the advantages of the two emulsifiers and further improve the emulsifying effect.

[0031] Preferably, the pH of the mixed emulsion is 1.5 - 2.5.

[0032] Exemplarily, hydrochloric acid is used to adjust the pH value of the mixed emulsion.

[0033] Exemplarily, the water can be distilled water.

[0034] Exemplarily, the coal tar pitch includes at least one of T - 7, T - 8 or T - 9, and the naphtha includes aromatic naphtha.

[0035] Preferably, the mass ratio of the coal tar pitch to the naphtha is (2.5 - 3.5):2, and further preferably (2.8 - 3.2):2.

[0036] Preferably, the solid content of the evaporation residue of the emulsified rubber asphalt material is ≥55%, the ductility of the evaporation residue at 5 cm / min and 5 °C is ≥20 cm, the penetration of the evaporation residue is 40 - 80 (0.1 mm), the softening point of the evaporation residue is ≥55 °C, and the apparent viscosity of the evaporation residue at 180 °C is 1 Pa·s - 4 Pa·s.

[0037] Second aspect, the present invention provides a method for preparing the emulsified rubber asphalt material, comprising the following steps: S1. Add the composite stabilizer and the composite emulsifier into water, and after adjusting the pH value of the mixed system, obtain a mixed emulsion; Mix coal tar pitch and naphtha to obtain an auxiliary agent; S2. Add the rubber asphalt and the mixed emulsion into a first colloid mill, and perform first emulsification at 110°C to 120°C and 1.5 MPa to 2.0 MPa, then cool to below 90°C to obtain a primary product of emulsified rubber asphalt; S3. Add the primary product of emulsified rubber asphalt and the auxiliary agent into a second colloid mill for second emulsification to obtain the emulsified rubber asphalt material.

[0038] Since a relatively high temperature is required during the emulsification of rubber asphalt, and the thermal stability of the auxiliary agent is poor and it is not suitable to be added at a high temperature (above 100°C), therefore, the present invention performs two-stage emulsification on the rubber asphalt. The first emulsification mainly solves the emulsification problem of rubber asphalt, and the second emulsification mainly solves the problem of effective addition of the auxiliary agent. The second emulsification adds the heat-sensitive auxiliary agent into the primary product of emulsified rubber asphalt, realizing the improvement of the performance of the emulsified rubber asphalt material. A relatively high emulsification temperature (110°C to 120°C) can increase the uniformity of the first emulsification. However, under normal pressure, water has already boiled and evaporated at this emulsification temperature, resulting in the demulsification of the primary product of emulsified rubber asphalt. Pressurization (1.5 MPa to 2.0 MPa) can ensure that water remains in a liquid state, thus ensuring that the primary product of emulsified rubber asphalt does not demulsify. The present invention performs the first emulsification under specific temperature and pressure (closed high-pressure conditions), effectively ensuring the production of the primary product of emulsified rubber asphalt at a relatively high temperature, which is beneficial to improving the emulsification effect of rubber asphalt.

[0039] The method for preparing the emulsified rubber asphalt material provided by the present invention has a simple and continuous process. The obtained emulsified rubber asphalt material has a uniform composition, enhancing the compatibility between the rubber asphalt and the modifiers (including the composite stabilizer, the composite emulsifier, and the auxiliary agent), thereby improving the storage stability, bonding effect, workability during construction, and environmental friendliness of the emulsified rubber asphalt material.

[0040] Exemplarily, in S1, the temperature of water is below 30°C.

[0041] Exemplarily, in S2, the rubber asphalt is the rubber asphalt at 170°C to 185°C after melting.

[0042] Preferably, in S2, the power of the first emulsification is 20 kW to 30 kW, and the flow rate is 6 m 3 / h to 10 m 3 / h.

[0043] Preferably, in S3, the temperature of the second emulsification is 75°C to 90°C, the power of the second emulsification is 20 kW to 30 kW, and the flow rate is 6 m 3 / h to 10 m 3 / h.

[0044] It should be noted that the present invention does not require the pressure of the second emulsification. To ensure the continuity of the production system of the emulsified rubber asphalt material, the pressure of the second emulsification can be the same as that of the first emulsification. The present invention controls the emulsification time by limiting the power and flow rate of the first emulsification and the second emulsification.

[0045] Exemplarily, after the second emulsification in S3, it further includes: cooling to below 60°C and reducing the pressure to atmospheric pressure to ensure stable storage of the emulsified rubber asphalt material in the best state.

[0046] In a third aspect, the present invention provides a production system for the emulsified rubber asphalt material described above, including a feeding device, a shearing and grinding device, a cooling device, and a finished product conveying device; wherein, The feeding device is used for short-term storage and heating of each raw material; The shearing and grinding device, connected to the feeding device, includes a first colloid mill and a second colloid mill. The first colloid mill is used for the preparation of the mixed emulsion and the first emulsification, and the second colloid mill is used for the second emulsification; The cooling device, with an inlet connected to the first colloid mill and an outlet connected to the second colloid mill, is used for cooling the initial product of the emulsified rubber asphalt after the first emulsification; The finished product conveying device, connected to the second colloid mill, is used for conveying and storing the emulsified rubber asphalt material.

[0047] The production system for the emulsified rubber asphalt material provided by the present invention realizes the automatic control of the production of emulsified rubber asphalt, greatly improves the production efficiency and product quality, thereby reducing the production cost; the use of the shearing and grinding device realizes the two-stage emulsification of the rubber asphalt, significantly improves the emulsification effect of the rubber asphalt, and thus improves the comprehensive performance of the emulsified rubber asphalt material.

[0048] Preferably, the production system for the emulsified rubber asphalt material further includes an emulsion preparation device, connected to the feeding device, for preparing rubber asphalt and additives.

[0049] Preferably, the feeding device includes a mixed emulsion tank, a rubber asphalt tank, and an additive tank.

[0050] Preferably, a metering device is connected between the feeding device and the shearing and grinding.

[0051] Preferably, a metering device is connected between the cooling device and the second colloid mill.

[0052] Exemplarily, the cooling device can rapidly cool the initial product of emulsified rubber asphalt by circulating cooling water to prevent the initial product of emulsified rubber asphalt from demulsifying under high-temperature conditions, and at the same time can meet the temperature requirement (below 90°C) for the second emulsification after adding additives.

[0053] Preferably, motors are respectively connected to the first colloid mill and the second colloid mill.

[0054] Preferably, the finished product conveying device includes more than 2 finished product tanks to achieve continuous production.

[0055] Preferably, the finished product conveying device includes a cooling device and a pressure reducing device.

[0056] When the emulsified rubber asphalt material provided by the present invention is used for road construction, it can significantly improve the bonding effect between aggregate particles, consolidate loose stones, enhance the bonding strength between pavement structural layers, and can effectively prevent the erosion of the upper layer water of the pavement to the base layer, provide sufficient bonding force to ensure the stability of the pavement structure, not only reduce energy consumption and environmental pollution, but also improve construction efficiency, and is particularly suitable for the maintenance, repair, slurry seal and bonding layer of old pavements in road construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 is a schematic structural diagram of a production system of an emulsified rubber asphalt material provided by the present invention; In the figure, 101 represents a rubber asphalt tank, 102 represents a mixed emulsion tank, and 103 represents an additive tank; 201 represents a first colloid mill, 202 represents a second colloid mill, and 203 represents a motor; 300 represents a cooling device; 401 and 402 respectively represent finished product tanks; 501 and 502 respectively represent metering devices. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0058] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0059] An embodiment of the present invention provides a production system of an emulsified rubber asphalt material (see Figure 1 ), including a feeding device, a shearing and grinding device, a cooling device 300 and a finished product conveying device; wherein, The feeding device is used for short-term storage and heating of each raw material; The shearing and grinding device, connected to the feeding device, includes a first colloid mill 201 and a second colloid mill 201. The first colloid mill 201 is used for the preparation of a mixed emulsion and the first emulsification, and the second colloid mill 202 is used for the second emulsification; The cooling device 300 has an inlet connected to the first colloid mill 201 and an outlet connected to the second colloid mill 202, and is used to cool the primary emulsified rubber asphalt product after the first emulsification. The finished product conveying device is connected to the second colloid mill 202 and is used to convey and store the emulsified rubber asphalt material.

[0060] In some embodiments, the production system of the emulsified rubber asphalt material further includes an emulsion preparation device ( Figure 1 not shown in the figure), which is connected to the feeding device and is used to prepare rubber asphalt and additives.

[0061] In some embodiments, the feeding device includes a rubber asphalt tank 101, a mixed emulsion tank 102, and an additive tank 103.

[0062] In some embodiments, a metering device 501 is connected between the feeding device and the shearing and grinding device.

[0063] In some embodiments, a metering device 502 is connected between the cooling device 300 and the second colloid mill 202.

[0064] In some embodiments, motors 203 are respectively connected to the first colloid mill 201 and the second colloid mill 202.

[0065] In some embodiments, the finished product conveying device includes two finished product tanks 401 and 402 to achieve continuous production.

[0066] In some embodiments, the finished product conveying device includes a cooling device and a pressure reducing device.

[0067] Exemplarily, before and after preparing the emulsified rubber asphalt, it is necessary to clean the first colloid mill 201, the second colloid mill 202, and the pipeline: preheat the first colloid mill 201 to 80°C - 90°C, add the mixed emulsion to the first colloid mill 201, after standing for 1 min - 5 min, turn on the motor 203 of the first colloid mill 201, disperse for 2 min and then discharge; pass through the cooling device 300 and the second colloid mill 202 preheated to 80°C - 90°C in sequence, after standing for 1 min - 5 min in the second colloid mill 202, turn on the motor 203 of the second colloid mill 202, disperse for 2 min and then discharge; then clean the first colloid mill 201, the second colloid mill 202, and the pipeline with clean water at 60°C.

[0068] Before preparing the emulsified rubber asphalt, by cleaning the first colloid mill 201, the second colloid mill 202 and the pipeline as described above, a protective film can be formed in the first colloid mill 201, the second colloid mill 202 and the pipeline, reducing the residue amount of raw materials in the production system during the preparation of emulsified rubber asphalt (non-sticking equipment), and making the production system easier to clean after preparing the emulsified rubber asphalt.

[0069] In the present invention, aromatic naphtha is selected as the naphtha, and materials without special instructions are all commercially available products.

[0070] Example 1 This example provides an emulsified rubber asphalt material, which includes the following raw materials in parts by mass: 55 parts of rubber asphalt, 45 parts of mixed emulsion, and 0.3 parts of additives.

[0071] The rubber asphalt includes matrix asphalt (A-70) and 40-mesh desulfurized rubber with a mass ratio of 79.3:14.

[0072] The mixed emulsion includes the following components in parts by mass: 0.2 part of composite stabilizer, 0.7 part of composite emulsifier, and 44.1 parts of water. The composite stabilizer includes polyvinyl alcohol, kerosene, hydroxycellulose, organic montmorillonite, and calcium chloride with a mass ratio of 10:20:10:10:50. The composite emulsifier includes octylphenol polyoxyethylene ether and cetyltrimethylammonium bromide with a mass ratio of 1.2:2.9. The pH of the mixed emulsion is 2.5.

[0073] The additives include coal tar pitch (T-7) and naphtha with a mass ratio of 3:2.

[0074] The preparation method of the above emulsified rubber asphalt material includes the following steps: Sa, preparing rubber asphalt: Melt 4632.5 g of matrix asphalt in an oven at 180 °C until it is in a flowing state, place it on a heating device, slowly add 817.5 g of desulfurized rubber under stirring at 300 rpm, keep it for 30 min, then transfer it to a high-speed shearing device, disperse it at 6000 rpm and 175 °C for 130 min, take it out and place it in an oven at 180 °C, develop it at a stirring rate of 6000 rpm for 45 min to obtain rubber asphalt, put it into the rubber asphalt tank 101 and keep it warm.

[0075] Sb, preparing the mixed emulsion: Weigh each component according to the designed ratio, mix the components of the composite stabilizer to obtain the composite stabilizer; mix the components of the composite emulsifier to obtain the composite emulsifier; Add the composite stabilizer and the composite emulsifier to water in sequence. The temperature of the water is below 30°C. After mixing evenly, add dilute hydrochloric acid dropwise to adjust the pH value of the mixed system, and then raise the temperature to 65°C at 300 rpm and 1.5°C / min. Stir at a constant temperature for 30 min to obtain a mixed emulsion, which is put into the mixed emulsion tank 102 and kept warm.

[0076] Sc, Preparation of additives: Mix coal tar pitch and naphtha to obtain additives, which are put into the additive tank 103.

[0077] It should be noted that the order between Sa and Sc is not limited in this embodiment.

[0078] Sd, Preparation of the initial product of emulsified rubber asphalt: Introduce dry hot air into the production system of emulsified rubber asphalt materials, pressurize to 1.5 MPa to reach a closed high-pressure state, add rubber asphalt and the mixed emulsion to the first colloid mill 201, and carry out the first emulsification at 110°C (power is 25 kW, flow rate is 8 m 3 / h), and then cool to 85°C through the cooling device 300 to obtain the initial product of emulsified rubber asphalt.

[0079] Se, Preparation of emulsified rubber asphalt materials: Add the initial product of emulsified rubber asphalt and the additives to the second colloid mill 202, and carry out the second emulsification at 85°C (power is 25 kW, flow rate is 8 m 3 / h), and then transport it to the finished product tanks 401 and 402 through pipelines, cool to 60°C, and reduce the pressure to atmospheric pressure to obtain emulsified rubber asphalt materials.

[0080] Example 2 This example provides an emulsified rubber asphalt material, which includes the following raw materials in parts by mass: 60 parts of rubber asphalt, 49.5 parts of mixed emulsion, and 0.4 part of additives.

[0081] The rubber asphalt includes matrix asphalt (A-70) and 80-mesh desulfurized rubber with a mass ratio of 75:25.

[0082] The mixed emulsion includes the following components in parts by mass: 0.15 part of composite stabilizer, 1 part of composite emulsifier, and 48.35 parts of water. The composite stabilizer includes polyvinyl alcohol, kerosene, hydroxycellulose, organic montmorillonite, and calcium chloride with a mass ratio of 15:25:15:15:65. The composite emulsifier includes octylphenol polyoxyethylene ether and cetyltrimethylammonium bromide with a mass ratio of 1:2.5. The pH of the mixed emulsion is 2.

[0083] The additives include coal tar pitch (T-8) and naphtha with a mass ratio of 2.6:2.

[0084] The preparation method of the above emulsified rubber asphalt material comprises the following steps: Sa, preparing rubber asphalt: Melt 4080.0 g of base asphalt (A70) in an oven at 170 °C until it becomes a flowing state, place it on a heating device, slowly add 1360.0 g of desulfurized rubber under stirring at 300 rpm, keep it for 30 min, then transfer it to a high-speed shearing device, disperse it at 5000 rpm and 170 °C for 180 min, take it out and place it in an oven at 170 °C, develop it at a stirring rate of 5000 rpm for 50 min to obtain rubber asphalt, put it into rubber asphalt tank 101 and keep it warm.

[0085] Sb, preparing a mixed emulsion: Weigh each component according to the designed ratio, mix the components of the composite stabilizer to obtain the composite stabilizer; mix the components of the composite emulsifier to obtain the composite emulsifier; Add the composite stabilizer and the composite emulsifier to water in sequence, the temperature of the water is below 30 °C. After mixing evenly, add dilute hydrochloric acid dropwise to adjust the pH value of the mixed system, then raise the temperature to 65 °C at 300 rpm and 1.5 °C / min, and stir constantly at a constant temperature for 30 min to obtain a mixed emulsion, put it into mixed emulsion tank 102 and keep it warm.

[0086] Sc, preparing an auxiliary agent: Mix coal tar pitch and naphtha to obtain an auxiliary agent, and put it into auxiliary agent tank 103.

[0087] It should be noted that the order between Sa and Sc is not limited in this embodiment.

[0088] Sd, preparing a preliminary product of emulsified rubber asphalt: Introduce dry hot air into the production system of the emulsified rubber asphalt material, pressurize it to 1.8 MPa to reach a closed high-pressure state, add the rubber asphalt and the mixed emulsion to the first colloid mill 201, carry out the first emulsification at 115 °C (the power is 30 kW, the flow rate is 10 m 3 / h), and then cool it to 90 °C through the cooling device 300 to obtain a preliminary product of emulsified rubber asphalt.

[0089] Se, preparing the emulsified rubber asphalt material: Add the preliminary product of emulsified rubber asphalt and the auxiliary agent to the second colloid mill 202, carry out the second emulsification at 90 °C (the power is 30 kW, the flow rate is 10 m 3 / h), and then transport it to the finished product tanks 401 and 402 through a pipeline, cool it to 50 °C, and reduce the pressure to atmospheric pressure to obtain the emulsified rubber asphalt material.

[0090] Example 3 This embodiment provides an emulsified rubber asphalt material, which comprises the following raw materials in parts by mass: 50 parts of rubber asphalt, 39 parts of mixed emulsion, and 0.2 parts of additives.

[0091] The rubber asphalt comprises matrix asphalt (A-90) and 60-mesh desulfurized rubber with a mass ratio of 70:30.

[0092] The mixed emulsion comprises the following components in parts by mass: 0.4 part of composite stabilizer, 0.6 part of composite emulsifier, and 38 parts of water. The composite stabilizer comprises polyvinyl alcohol, diesel, hydroxycellulose, organic montmorillonite, and calcium chloride with a mass ratio of 5:15:5:5:40. The composite emulsifier comprises octylphenol polyoxyethylene ether and cetyltrimethylammonium bromide with a mass ratio of 1.8:3. The pH value of the mixed emulsion is 1.5.

[0093] The additives comprise coal tar pitch (T-9) and naphtha with a mass ratio of 3.4:2.

[0094] The preparation method of the above emulsified rubber asphalt material comprises the following steps: Sa, preparing rubber asphalt: Melting 3794.0 g of matrix asphalt in an oven at 185 °C until it becomes a flowing state, placing it on a heating device, slowly adding 1626.0 g of desulfurized rubber under stirring at 300 rpm, maintaining for 30 min, then transferring it to a high-speed shearing device, dispersing at 4500 rpm and 180 °C for 210 min, taking it out and placing it in an oven at 185 °C, developing at a stirring rate of 4500 rpm for 60 min to obtain rubber asphalt, putting it into rubber asphalt tank 101 and keeping it warm.

[0095] Sb, preparing mixed emulsion: Weighing each component according to the designed ratio, mixing the components of the composite stabilizer to obtain the composite stabilizer; mixing the components of the composite emulsifier to obtain the composite emulsifier; Adding the composite stabilizer and the composite emulsifier into water in sequence, the temperature of the water is below 30 °C. After mixing evenly, dropping dilute hydrochloric acid to adjust the pH value of the mixed system, then raising the temperature to 65 °C at 300 rpm and 1.5 °C / min, and stirring at a constant temperature for 30 min to obtain the mixed emulsion, putting it into mixed emulsion tank 102 and keeping it warm.

[0096] Sc, preparing additives: Mixing coal tar pitch and naphtha to obtain additives, putting them into additive tank 103.

[0097] It should be noted that this embodiment does not limit the sequence between Sa and Sc.

[0098] Sd, preparing the initial product of emulsified rubber asphalt: Dry hot air is introduced into the production system of the emulsified rubber asphalt material, pressurized to 2.0 MPa to reach a closed high-pressure state, and the rubber asphalt and the mixed emulsion are added to the first colloid mill 201, and the first emulsification is carried out at 120 °C (the power is 20 kW, and the flow rate is 6 m 3 / h), and then cooled to 85 °C through the cooling device 300 to obtain the preliminary product of the emulsified rubber asphalt.

[0099] Se, to prepare the emulsified rubber asphalt material: The preliminary product of the emulsified rubber asphalt and the additives are added to the second colloid mill 202, and the second emulsification is carried out at 75 °C (the power is 20 kW, and the flow rate is 6 m 3 / h), and then transported to the product tanks 401 and 402 through pipelines, cooled to 55 °C, and depressurized to atmospheric pressure to obtain the emulsified rubber asphalt material.

[0100] Example 4 This example provides an emulsified rubber asphalt material, which is similar to Example 2, except that: the composite stabilizer is composed of polyvinyl alcohol and calcium chloride with a mass ratio of 1:5. The other raw material components and their ratios are the same as those in Example 2, and will not be repeated here.

[0101] The preparation method of the above emulsified rubber asphalt material is the same as that in Example 2, and will not be repeated here.

[0102] Example 5 This example provides an emulsified rubber asphalt material, which is similar to Example 2, except that: the composite stabilizer is composed of kerosene, hydroxycellulose and organic montmorillonite with a mass ratio of 2:1:1. The other raw material components and their ratios are the same as those in Example 2, and will not be repeated here.

[0103] The preparation method of the above emulsified rubber asphalt material is the same as that in Example 2, and will not be repeated here.

[0104] Example 6 This example provides an emulsified rubber asphalt material, which is similar to Example 1, except that: the composite emulsifier is composed of octylphenol polyoxyethylene ether and anionic surfactant kzw-803Y with a mass ratio of 1.2:2.9, and the pH of the mixed emulsion is 11. The other raw material components and their ratios are the same as those in Example 1, and will not be repeated here.

[0105] The preparation method of the above emulsified rubber asphalt material is the same as that in Example 1, and will not be repeated here.

[0106] Comparative Example 1 This comparative example provides an emulsified rubber asphalt material, which is similar to Example 1, except that: the additive is coal tar pitch (T-7). The other raw material components and their ratios are the same as those in Example 1, and will not be repeated here.

[0107] The preparation method of the above emulsified rubber asphalt material comprises the following steps: Sa to Sb are the same as in Example 1 and will not be elaborated herein.

[0108] Sc: Put coal tar pitch into the auxiliary agent tank 103.

[0109] Sd to Se are the same as in Example 1 and will not be elaborated herein.

[0110] Comparative Example 2 This comparative example provides an emulsified rubber asphalt material, which is similar to Example 1, except that the auxiliary agent is naphtha. The other raw material components and their ratios are the same as in Example 1 and will not be elaborated herein.

[0111] The preparation method of the above emulsified rubber asphalt material comprises the following steps: Sa to Sb are the same as in Example 1 and will not be elaborated herein.

[0112] Sc: Put naphtha into the auxiliary agent tank 103.

[0113] Sd to Se are the same as in Example 1 and will not be elaborated herein.

[0114] Comparative Example 3 This comparative example provides an emulsified rubber asphalt material, which is similar to Example 2, except that the composite emulsifier is replaced with sodium lignosulfonate (an anionic surfactant) of the same mass, and the pH value of the mixed emulsion is 11. The other raw material components and their ratios are the same as in Example 2 and will not be elaborated herein.

[0115] The preparation method of the above emulsified rubber asphalt material comprises the following steps: Sa is the same as in Example 1 and will not be elaborated herein.

[0116] Sb: Prepare a mixed emulsion: Weigh each component according to the designed ratio, mix the components of the composite stabilizer to obtain the composite stabilizer; Add the composite stabilizer and the emulsifier (sodium lignosulfonate) to water in sequence. The temperature of the water is below 30°C. After mixing evenly, add dilute hydrochloric acid to adjust the pH value of the mixed system, and then raise the temperature to 65°C at 300 rpm and 1.5°C / min, and stir constantly for 30 min to obtain the mixed emulsion, which is put into the mixed emulsion tank 102 and kept warm.

[0117] Sc to Se are the same as in Example 1 and will not be elaborated herein.

[0118] Comparative Example 4 This comparative example provides an emulsified rubber asphalt material, which is similar to Example 3, except that the mass fraction of the rubber asphalt is 80 parts. The other raw material components and their ratios are the same as in Example 3 and will not be elaborated herein.

[0119] The preparation method of the above emulsified rubber asphalt material is the same as that of Example 3 and will not be elaborated here.

[0120] Comparative Example 5 This comparative example provides an emulsified asphalt material, which is similar to Example 3, except that the rubber asphalt is replaced with the same mass of matrix asphalt A-70. The other raw material components and their ratios are the same as those of Example 3 and will not be elaborated here.

[0121] The preparation method of the above emulsified asphalt material includes the following steps: Sa. Put 542.0 g of matrix asphalt into the rubber asphalt tank 101 and keep it warm.

[0122] Sb - Se are similar to Example 3, except that the rubber asphalt in Sd is replaced with matrix asphalt, and will not be elaborated here.

[0123] Comparative Example 6 This comparative example provides a preparation method of an emulsified rubber asphalt material, which is similar to Example 1, except that the auxiliary agent, the composite stabilizer and the composite emulsifier are used as a mixed solution and only one emulsification is carried out. Specifically, it includes the following steps: Sa is the same as Example 1 and will not be elaborated here.

[0124] Sb. Prepare the mixed emulsion: Weigh each component according to the designed ratio. Mix the components of the composite stabilizer to obtain the composite stabilizer; mix the components of the composite emulsifier to obtain the composite emulsifier; mix the coal tar pitch and the naphtha to obtain the auxiliary agent; Add the composite stabilizer, the composite emulsifier and the auxiliary agent into water in sequence. The temperature of the water is below 30°C. After mixing evenly, add dilute hydrochloric acid dropwise to adjust the pH value of the mixed system, and then raise the temperature to 65°C at 300 rpm and 1.5°C / min, and stir constantly for 30 min to obtain the mixed emulsion, which is put into the mixed emulsion tank 102 and kept warm.

[0125] It should be noted that the order between Sa and Sb in this example is not limited.

[0126] Sc. Prepare the emulsified rubber asphalt material: Introduce dry hot air into the production system of the emulsified rubber asphalt material, pressurize it to 1.5 MPa to reach the closed high-pressure state, add the rubber asphalt and the mixed emulsion into the first colloid mill 201, and carry out the first emulsification at 110°C (the power is 25 kW, and the flow rate is 8 m 3 / h), and then transport it to the finished product tanks 401 and 402 through pipelines, cool it to 60°C, and reduce the pressure to atmospheric pressure to obtain the emulsified rubber asphalt material.

[0127] The raw material components and their ratios of the above emulsified rubber asphalt material are the same as those in Example 1, and will not be elaborated here.

[0128] Comparative Example 7 This comparative example provides a method for preparing an emulsified rubber asphalt preliminary product, which is similar to Example 2, except that in Sd, the first emulsification is carried out under normal pressure. The specific steps are as follows: Steps Sa - Sc are the same as those in Example 2 and will not be elaborated here.

[0129] Sd: Prepare the emulsified rubber asphalt preliminary product: Under normal pressure, add the rubber asphalt and the mixed emulsion into the first colloid mill 201, and carry out the first emulsification at 95°C (power is 30 kW, flow rate is 10 m 3 / h), then cool to 50°C to obtain the emulsified rubber asphalt preliminary product.

[0130] The raw material components and their ratios of the above emulsified rubber asphalt preliminary product are the same as those in Example 2 and will not be elaborated here.

[0131] Comparative Example 8 This comparative example provides a method for preparing an emulsified rubber asphalt preliminary product, which is similar to Example 2, except that in Sd, no cooling is carried out after the first emulsification, and in Se, the temperature of the second emulsification is 100°C. The specific steps are as follows: Steps Sa - Sc are the same as those in Example 2 and will not be elaborated here.

[0132] Sd: Prepare the emulsified rubber asphalt preliminary product: Introduce dry hot air into the production system of the emulsified rubber asphalt material, pressurize it to 1.8 MPa to reach a closed high-pressure state, add the rubber asphalt and the mixed emulsion into the first colloid mill 201, and carry out the first emulsification at 115°C (power is 30 kW, flow rate is 10 m 3 / h), then obtain the emulsified rubber asphalt preliminary product.

[0133] Se: Prepare the emulsified rubber asphalt material: Add the emulsified rubber asphalt preliminary product and the additives into the second colloid mill 202, and carry out the second emulsification at 100°C (power is 30 kW, flow rate is 10 m 3 / h), then transport it to the finished product tanks 401 and 402 through pipelines, cool to 50°C, and reduce the pressure to normal pressure to obtain the emulsified rubber asphalt material.

[0134] The raw material components and their ratios of the above emulsified rubber asphalt preliminary product are the same as those in Example 2 and will not be elaborated here.

[0135] Verification test The samples (primary emulsified rubber asphalt and emulsified rubber asphalt materials) of Examples 1-6 and Comparative Examples 1-8 were respectively subjected to performance tests. The test standards refer to the "Test Procedures for Asphalt and Asphalt Mixtures in Highway Engineering" JTG E20-2011, and the test results are shown in Tables 1-2.

[0136] Table 1 Performance Test Results of Examples 1-3

[0137] Table 2 Performance Test Results of Examples 4-6 and Comparative Examples 1-8

[0138] It can be seen from the table that: (1) The raw materials and mixing ratio processes of Example 4 and Example 2 are similar, except for the difference in stabilizers. Polyvinyl alcohol and calcium chloride are used as stabilizers, which mainly improve the formation of the interfacial protective film and the interfacial double electric layer. Their effects on the stability of the emulsion system are relatively single. For materials with greater emulsification difficulty such as rubber asphalt, the formation of the water-in-oil system is worse than that of Example 2, and the unemulsified rubber asphalt increases the content of sieve residues, resulting in a certain decrease in storage stability; due to the decrease in rubber asphalt in the sample emulsion, the penetration of its evaporation residue increases, the softening point decreases, and the ductility decreases, and the overall indexes of high-temperature deformation resistance and low-temperature crack resistance both decrease.

[0139] (2) The raw materials and mixing ratio processes of Example 5 and Example 2 are similar, except for the difference in stabilizers. Kerosene and organic montmorillonite are used as stabilizers, and their main function is to promote the formation of steric hindrance effects on the surface of rubber asphalt oil droplets. Kerosene can increase the interlayer spacing of organic montmorillonite and extend into a three-dimensional network structure at the interface. The three-dimensional network structure formed by the interaction of hydroxycellulose and water molecules increases the viscosity of the solution and delays the aggregation of rubber asphalt oil droplets; however, due to the lack of interfacial charge effects, it is difficult to exert the effect of emulsifier molecules, and the formation of the water-in-oil system is worse than that of Example 2, and the unemulsified rubber asphalt further increases the content of sieve residues, resulting in a significant decrease in storage stability; due to the decrease in the solid content in the stable system of the sample, the penetration of its evaporation residue increases, the softening point decreases, and the ductility decreases, and the overall index of high-temperature deformation resistance decreases and the low-temperature crack resistance decreases.

[0140] (3) Example 6 is similar to Example 1 in terms of raw materials and proportioning process, except for the difference in emulsifiers. Non-ionic surfactants (octylphenol polyoxyethylene ether) have good thermal stability and low surface tension, but there are problems such as many vacancies at the oil-water interface and loose interfacial films; anionic surfactants (kzw-803Y) have good emulsifying effects, can effectively strengthen the charge density at the interface, and have good storage stability, but there are deficiencies such as slow demulsification speed, weak water resistance, and slow film-forming speed. Anionic surfactants result in unqualified adhesion index between the sample emulsion system and coarse aggregates, and due to the presence of anionic emulsifiers in the evaporation residue of the sample, water remains, resulting in a decrease in the high-temperature index performance of the evaporation residue.

[0141] (4) Comparative Example 1 is similar to Example 1 in terms of raw materials and proportioning process, except for the difference in additives. The main components of coal tar pitch are polycyclic aromatic hydrocarbons (PAHs), heterocyclic compounds, oxygen / sulfur-containing groups, and contain surface active substances (such as phenols, acidic groups), which can reduce the oil-water interface tension. Coal tar pitch can significantly improve the adhesion between the sample and coarse aggregates, making the asphalt film on the stone surface without peeling, and the wrapping area reaching 100%. Coal tar pitch has little effect on the properties of the evaporation residue of the sample.

[0142] (5) Comparative Example 2 is similar to Example 1 in terms of raw materials and proportioning process, except for the difference in additives. Naphtha contains light alkanes, cycloalkanes, and a small amount of aromatic hydrocarbons, has low viscosity and is easy to disperse, has a certain promoting effect on adhesion, is easily soluble in rubber asphalt, and can improve the colloidal structure. The sample emulsion system of Comparative Example 2 is basically similar to that of Example 1; Naphtha improves the colloidal structure of rubber asphalt, increases the ductility of the evaporation residue of the sample, while the softening point decreases, the penetration increases, the low-temperature performance is improved, and the high-temperature deformation resistance decreases slightly.

[0143] (6) Comparative Example 3 is similar to Example 2 in terms of raw materials and proportioning process, except for the difference in emulsifiers. Anionic surfactants (sodium lignosulfonate) result in poor adhesion between the sample emulsion system and coarse aggregates, and the wrapping area is 3 / 10 - 5 / 10; the high-temperature index performance of the evaporation residue of the sample decreases, and the low-temperature anti-cracking index decreases slightly, which is related to the slow-breaking and slow-setting structural characteristics of anionic emulsifiers. In an alkaline environment, sodium lignosulfonate has good emulsifying effects, can be qualitatively adsorbed on the rubber asphalt-water interface to form a dense protective film, and has good storage stability, but there are deficiencies such as slow demulsification speed, weak water resistance, slow film-forming speed, and the need for specific conditions to achieve demulsification.

[0144] (7) Comparative Example 4 was similar to Example 3 in terms of raw materials, except that the mass ratio of rubber asphalt was increased. Without increasing the emulsifier, stabilizer, and additives, significantly increasing the content of rubber asphalt would result in a lack of sufficient surfactant amphiphilic molecules at the interface between the rubber asphalt droplets dispersed in the aqueous solution and water, a lack of sufficient emulsification system stabilizer, and a lack of additive materials to increase the wrapping viscosity. This would lead to excessive sieve residues and poor storage stability of the sample. Affected by the increase in the proportion of rubber asphalt, the high-temperature deformation resistance of the distillation product of the sample increased to a certain extent. However, the excessive rubber asphalt with poor dispersion effect made the internal structure uniformity of the sample worse, and thus the low-temperature performance decreased to a certain extent.

[0145] (8) Comparative Example 5 was similar to Example 3 in terms of raw materials and the mixing ratio process, except that rubber asphalt was replaced with matrix asphalt A-70. Under the action of a strong emulsifier, stabilizer, and additives, the solid content, sieve residue, adhesion to coarse aggregate, and storage stability of the sample were all well demonstrated. In the evaporation residue of the sample, due to the lack of a modifier and the influence of the emulsifier, stabilizer, and additives, the performance was basically the same as that of matrix asphalt A-70, and there was a slight deterioration in high-temperature stability.

[0146] (9) Comparative Example 6 had the same raw materials and mixing ratio process as Example 1, but only one emulsification was carried out. Since only one emulsification was carried out under a closed high-pressure state, for the additive materials that were only suitable for emulsification at a lower temperature, the coal tar pitch was over-aged and part of the naphtha volatilized. As a result, the adhesion of the sample to the coarse aggregate was not improved, the low-temperature crack resistance of the evaporation residue of the sample decreased, and there was a certain hardening phenomenon.

[0147] (10) Comparative Example 7 had the same raw materials and mixing ratio process as Example 2, except that the first emulsification was carried out at normal pressure. Due to the relatively low temperature at normal pressure, the viscosity of the sample entering the colloid mill 203 was high, the particle size of the rubber asphalt micro-droplets was large, and the adsorption effect of the emulsifier molecules was poor. This led to poor emulsification and stability of the rubber asphalt. For example, the sieve residue of the sample was relatively large, the storage stability was poor, and it was difficult to use. The content of rubber asphalt in the evaporation residue of the sample was low, and the improvement effect of various properties (compared with the matrix asphalt) was limited.

[0148] (11) Comparative Example 8 had the same raw materials and mixing ratio process as Example 2, except that the temperature of the second emulsification was 100°C. Since the emulsified rubber asphalt initial product system had a high energy due to the failure to cool the rubber asphalt in time after the first emulsification, the system quickly underwent demulsification. The system showed: low solid content, excessive sieve particles, low adhesion to coarse aggregate, and poor storage stability, making it difficult to use. In the evaporation residue of the sample, since most of the rubber asphalt was demulsified and mainly consisted of matrix asphalt with a small amount of rubber asphalt, its performance was only slightly better than that of the matrix asphalt.

[0149] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An emulsified rubber asphalt material, characterized in that: The raw materials include the following parts by weight: 50 to 60 parts of rubber asphalt, 38 to 50 parts of mixed emulsion and 0.2 to 0.4 parts of additives; The mixed emulsion comprises a composite stabilizer and a composite emulsifier, and the auxiliary agent comprises coal tar pitch and naphtha.

2. The emulsified rubber asphalt material according to claim 1, characterized in that: The rubber asphalt comprises base asphalt and desulfurized rubber in a mass ratio of (70-80):(14-30); The mass ratio of the coal tar pitch to naphtha is (2.5-3.5):

2.

3. The emulsified rubber asphalt material according to claim 1, characterized in that: The mixed emulsion comprises the following components in parts by weight: 0.1 to 0.4 parts of a composite stabilizer, 0.6 to 1 parts of a composite emulsifier and 38 to 48.5 parts of water; and / or The pH of the mixed emulsion is 1.5-2.

5.

4. The emulsified rubber asphalt material according to claim 1 or 3, characterized in that: The composite stabilizer includes a water-soluble polymer, an organic solvent, a cellulose derivative, an organically modified layered silicate and an inorganic salt; The composite emulsifier comprises a nonionic surfactant and a cationic surfactant.

5. The emulsified rubber asphalt material according to claim 4, characterized in that: The composite stabilizer comprises polyvinyl alcohol, solvent oil, hydroxy cellulose, organic montmorillonite and calcium chloride in a mass ratio of (5-15):(15-25):(5-15):(5-15):(40-70); and / or The mass ratio of the nonionic surfactant to the cationic surfactant is (1-2):(2.5-3).

6. The emulsified rubber asphalt material according to claim 5, characterized in that: The solvent oil comprises at least one of kerosene or diesel; and / or The nonionic surfactant comprises octylphenol polyoxyethylene ether; and / or The cationic surfactant includes cetyltrimethylammonium bromide.

7. The method for preparing the emulsified rubber asphalt material according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1, adding a composite stabilizer and a composite emulsifier into water, and adjusting the pH value of the mixed system to obtain a mixed emulsion; Mix coal tar pitch and naphtha to obtain an additive; S2, adding the rubber asphalt and the mixed emulsion into a first colloid mill, performing a first emulsification at 110° C. to 120° C. and 1.5 MPa to 2.0 MPa, and then cooling to below 90° C. to obtain a primary emulsified rubber asphalt product; S3, adding the initial emulsified rubber asphalt product and the additives into a second colloid mill, performing a second emulsification, and obtaining an emulsified rubber asphalt material.

8. The method for preparing the emulsified rubber asphalt material according to claim 7, characterized in that: In S2, the power of the first emulsification is 20kW~30kW, and the flow rate is 6m 3 / h~10m 3 / h; and / or In S3, the temperature of the second emulsification is 75°C to 90°C, the power of the second emulsification is 20kW to 30kW, and the flow rate is 6m 3 / h~10m 3 / h.

9. The production system of the emulsified rubber asphalt material according to any one of claims 1 to 6, characterized in that: It includes a feeding device, a shearing and grinding device, a cooling device and a finished product conveying device; wherein, The feeding device is used for short-term storage and heating of various raw materials; The shearing and grinding device is connected to the feeding device, and includes a first colloid mill and a second colloid mill, wherein the first colloid mill is used for the preparation of the mixed emulsion and the first emulsification, and the second colloid mill is used for the second emulsification; The cooling device, whose inlet is connected to the first colloid mill and whose outlet is connected to the second colloid mill, is used to cool the initial emulsified rubber asphalt product after the first emulsification; The finished product conveying device is connected to the second colloid mill and is used for conveying and storing emulsified rubber asphalt materials.

10. The production system of emulsified rubber asphalt material according to claim 9, characterized in that: The production system of the emulsified rubber asphalt material also includes an emulsion preparation device, which is connected to the feeding device and is used to prepare rubber asphalt and additives; and / or The feeding device comprises a mixed emulsion tank, a rubber asphalt tank and an additive tank; and / or A metering device is connected between the feeding device and the shearing grinder; and / or A metering device is connected between the cooling device and the second colloid mill; and / or The first colloid mill and the second colloid mill are respectively connected to motors; and / or The finished product conveying device includes more than two finished product tanks to achieve continuous production; and / or The finished product conveying device includes a cooling device and a pressure reducing device.

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