Light-colored asphalt for highway tunnel and preparation method of light-colored asphalt

Abstract

The invention provides bright-color asphalt for a highway tunnel and a preparation method of the bright-color asphalt. The bright-color asphalt is prepared from the following components in parts by weight: 30 to 38 parts of naphthenic oil, 62 to 70 parts of petroleum resin, 5 to 10 parts of EVA (Ethylene Vinyl Acetate) resin, 3 to 5 parts of SBS (Styrene Butadiene Styrene) modifier, 2 to 4 parts of anti-aging agent and 1 to 2 parts of compatilizer. The anti-aging agent comprises a 1076 antioxidant and LDHs (layered double hydroxides) in a weight ratio of 1: (2-4). The method comprises a preheating step, a heat preservation step, a dispersion step, a shearing step, an SBS modifier and compatilizer adding step, an anti-aging agent adding step and a development step, the anti-aging performance and durability of the bright-color asphalt for the highway tunnel are improved, and meanwhile the bearing capacity of the bright-color asphalt is improved.

Description

Technical Field

[0001] The present application relates to the technical field of chemical engineering and material preparation equipment, and in particular to a bright-colored asphalt for highway tunnels and a preparation method thereof. Background Art

[0002] With the rapid increase in the mileage of China's highway construction, the number and mileage of tunnels are also increasing sharply. At the same time, the frequent safety accidents in tunnels have also touched the pain points of highway managers and technicians. The reason is that, on the one hand, the tunnel is a relatively closed, narrow tubular environment, and the road surface color is relatively monotonous, mainly gray and black series. Due to insufficient lighting in the tunnel, the driving vision is poor, making the tunnel a high-accident section, seriously affecting the driving safety in the tunnel. This situation is particularly obvious in short tunnels without lighting conditions; on the other hand, the frequency of traffic accidents in the entrance and exit sections of the tunnel is significantly higher than that in the middle section of the tunnel. This is because the tunnel light environment is composed of the light environment outside the tunnel and the lighting environment inside the tunnel. The drastic changes in light and dark inside and outside the tunnel can easily make it difficult for the driver's vision to adapt in time, causing the "black hole effect" and "white hole effect". These adverse effects of the tunnel light environment will reduce the driver's visual efficacy, increase the driver's visual burden, and even cause the driver's visual illusion phenomenon, which will induce tunnel traffic accidents, seriously affecting the driving safety of the tunnel, reducing driving comfort and tunnel operation energy saving effect. Therefore, it is of great significance to study how to improve the light environment of tunnels, improve the visual environment of drivers when driving in tunnels, and improve the safety of driving in tunnels.

[0003] At present, many researchers have turned their attention to the research of bright-colored asphalt pavement. When it is applied to tunnel pavement, since the reflectivity of the bright-colored pavement is higher than that of the original black asphalt pavement, when the lights of the driving motor vehicle shine on the pavement, it can achieve the effect of increasing the brightness inside the tunnel and improve the driving comfort of the driver inside the tunnel; when applied to the entrance and exit of the tunnel, the strong reflectivity of the bright-colored asphalt pavement can reduce the brightness difference between the entrance and exit of the tunnel, thereby reducing the visual blind spot formed by the driver when entering and exiting the tunnel, and improving the driving safety of the driver between the entrance and exit of the tunnel. However, the main component of bright-colored asphalt is generally large in resin. Due to ultraviolet radiation affecting the durability of the color of the asphalt pavement, the pavement is oxidized after a certain period of use and needs maintenance, making the color of the asphalt brighter, but this type of asphalt has a short service life and increases the cost of pavement maintenance. Summary of the invention

[0004] The present application provides a bright-colored asphalt for a highway tunnel and a preparation method thereof, in order to solve the above-mentioned problems mentioned in the background technology.

[0005] The present application provides a bright asphalt for a highway tunnel, wherein the bright asphalt comprises the following components in parts by weight:

[0006] 30-38 parts by weight of cyclohexane oil, 62-70 parts by weight of petroleum resin, 5-10 parts by weight of EVA resin, 3-5 parts by weight of SBS modifier, 2-4 parts by weight of anti-aging agent and 1-2 parts by weight of compatibilizer.

[0007] The compatibilizer is furfural extracted oil, and the anti-aging agent includes 1076 antioxidant and LDHs in a weight ratio of 1:2-4.

[0008] Optionally, the anti-aging agent further includes polyethylene glycol diacrylate modified mica powder, and the weight ratio of 1076 antioxidant to polyethylene glycol diacrylate modified mica powder is 1:0.2-0.4.

[0009] Optionally, the petroleum resin is one or more of C9 petroleum resin, C5 petroleum resin or coumarone resin.

[0010] A method for preparing bright-colored asphalt for a highway tunnel, comprising:

[0011] Preheating step: Take cycloparaffinic oil by weight and preheat it at 150-160°C for 5-20 minutes.

[0012] Insulation step: Add petroleum resin to the preheated cyclohexane oil and keep it in an oven at 150-160°C for 25 minutes.

[0013] Dispersion step: Place the molten mixture of naphthenic oil and petroleum resin in a heating device at 160° C. and stir until the petroleum resin is evenly dispersed in the naphthenic oil.

[0014] Shearing step: EVA is added to the molten mixture after the dispersion step and sheared at a temperature of 165-175°C.

[0015] SBS modifier and compatibilizer adding steps: maintaining the temperature at 165-175° C., adding SBS modifier and compatibilizer, and shearing at a speed of 4500-5500 rad / min for 30-35 minutes until uniform dispersion.

[0016] Anti-aging agent adding steps: cool to 150-160°C, and add 1076 antioxidant, LDHs, polyethylene glycol diacrylate modified mica powder in sequence, and shear again at a speed of 2000-2500 rad / min for 15-20 minutes to obtain a bright asphalt primary product.

[0017] Development steps: Place the initial bright-colored asphalt product in a 165°C oven for development for 1.5-2 hours to obtain bright-colored asphalt.

[0018] Optionally, in the shearing step, after adding EVA, shearing is performed at a speed of 1500-2000 rad / min for 5-10 min, and then at a speed of 3000-3500 rad / min for 20-25 min.

[0019] Optionally, the preparation process of polyethylene glycol diacrylate modified mica powder includes:

[0020] (1) Dispersing mica powder in deionized water to obtain a first mica powder suspension.

[0021] (2) Add the first mica powder suspension into a grinder, heat to 40-90° C., and grind for 30 min-120 min to obtain a second mica powder suspension.

[0022] (3) Adding polyethylene glycol diacrylate to the second mica powder suspension, continuing grinding at a temperature of 45-95° C., reacting for 0.5-1.5 hours, and obtaining a water-containing modified mica powder.

[0023] (4) Drying the water-modified mica powder to obtain polyethylene glycol diacrylate modified mica powder.

[0024] Optionally, in the first mica powder suspension, the weight ratio of deionized water to mica powder is 2-6:1.

[0025] Optionally, the mass ratio of polyethylene glycol diacrylate to mica powder is 1:1.2-1.5.

[0026] Optionally, the water-containing modified mica powder is vacuum dried to a moisture content of less than or equal to 8%.

[0027] The bright-colored asphalt for highway tunnels and the preparation method thereof provided in the present application realize the preparation of bright-colored asphalt, and have the following beneficial effects compared with the prior art:

[0028] (1) By using cyclohexane oil and petroleum resin as the main raw materials, adding SBS modifier and EVA resin, SBS can form a compound with EVA to achieve a better modification effect, improve the thermoplasticity of light-colored asphalt, and improve the penetration of light-colored asphalt. Through the synergistic effect of 1076 antioxidant and LDHs, the antioxidant property of light-colored asphalt is improved together, and the service life of light-colored asphalt is extended, so that the light-colored asphalt not only has good color rendering after paving, but also improves the safety and comfort of driving in tunnel roads, and can also improve the anti-aging property of light-colored asphalt, extend the service life, and reduce the maintenance cost of tunnel roads. The compatibilizer uses furfural extracted oil, which can further improve the compatibility of each component in the light-colored asphalt.

[0029] (2) Mica powder is modified by using polyethylene glycol diacrylate. The surface of mica powder particles contains active groups such as hydroxyl groups, which can react with polyethylene glycol diacrylate. At the same time, the surface of mica powder has strong adsorption capacity, and polyethylene glycol diacrylate is easily adsorbed on the surface. Polyethylene glycol diacrylate wraps the surface of mica powder and is grafted in a small amount between the mica powder layers. This can reduce the surface energy of mica powder, improve the compatibility between mica powder and bright asphalt, and make the modified mica powder more stable in bright asphalt. It can also improve the strength and toughness of bright asphalt, and at the same time, it can also improve the oxidation resistance of bright asphalt.

[0030] (3) The method for preparing the bright-colored asphalt for highway tunnels provided in this application is easy to operate, the experimental conditions are easy to control, and all the raw materials used are environmentally friendly. It is suitable for large-scale production, has strong practicality, and has a wide range of applications. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application is clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the present application.

[0032] A bright asphalt for a highway tunnel, the bright asphalt comprising the following components in parts by weight:

[0033] 30-38 parts by weight of cyclohexane oil, 62-70 parts by weight of petroleum resin, 5-10 parts by weight of EVA resin, 3-5 parts by weight of SBS modifier, 2-4 parts by weight of anti-aging agent and 1-2 parts by weight of compatibilizer.

[0034] The compatibilizer is furfural extracted oil, and the anti-aging agent includes 1076 antioxidant and LDHs in a weight ratio of 1:2-4.

[0035] Specifically, cycloparaffinic oil is a petroleum fraction with cycloparaffin as the main component, containing a large number of saturated cyclic carbon chain structure molecules, which has a good promoting effect on the penetration of asphalt. Petroleum resin is an important auxiliary agent that can increase the adhesion of asphalt, and at the same time can increase the surface hardness and wear resistance of asphalt. SBS modifier combines the elasticity of rubber and the thermoplasticity of resin, and can simultaneously improve the low-temperature performance of light-colored asphalt; EVA resin can reconcile the compatibility of each component in asphalt and improve the low-temperature performance of light-colored asphalt. SBS can form a compound with EVA to improve the thermoplasticity of light-colored asphalt while improving the penetration of light-colored asphalt. When asphalt is laid on the ground, it is inevitably exposed to oxygen, rainwater and ultraviolet rays. During long-term use, light-colored asphalt is oxidized and aged. Anti-aging agents can slow down the contact reaction of light-colored asphalt with oxygen, ultraviolet rays and water, improve the durability of light-colored asphalt, and extend the use time of light-colored asphalt. 1076 antioxidant can promote the antioxidant properties of light-colored asphalt. LDHs is a new type of supramolecular anti-photooxidation aging agent, which is essentially a layered dihydroxy complex metal hydroxide. The structure of LDHs contains inorganic layers that can shield the action of ultraviolet light, which can greatly reduce the excitation effect of ultraviolet light during the photooxidation aging process of asphalt. Moreover, under the synergistic effect of 1076 antioxidant and LDHs, the antioxidant property of bright asphalt is improved together, the service life of bright asphalt is extended, and the bright asphalt has better color rendering within the time after paving, which improves the safety of driving in tunnel roads, increases the service life of bright asphalt, and reduces the maintenance cost of tunnel roads. The compatibilizer uses furfural extracted oil, which can further improve the compatibility of each component in bright asphalt.

[0036] The present application realizes the preparation of light-colored asphalt through the above scheme. By using cyclohexane oil and petroleum resin as the main raw materials, adding SBS modifier and EVA resin, SBS can form a compound with EVA to achieve a better modification effect. SBS can form a compound with EVA to improve the thermoplasticity of light-colored asphalt while improving the penetration of light-colored asphalt. Through the synergistic effect of 1076 antioxidant and LDHs, the antioxidant property of light-colored asphalt is improved together, and the service life of light-colored asphalt is extended, so that the light-colored asphalt has better color rendering within the time after paving, and the safety of driving in tunnel roads is improved, the service life of light-colored asphalt is improved, and the maintenance cost of tunnel roads is reduced. The compatibilizer adopts furfural extracted oil, which can further improve the compatibility of each component in the light-colored asphalt.

[0037] The preparation method is easy to operate, the experimental conditions are easy to control, and all the raw materials used are environmentally friendly. It is suitable for large-scale production, has strong practicality, and has a wide range of applications.

[0038] Optionally, the anti-aging agent further includes polyethylene glycol diacrylate modified mica powder, and the weight ratio of 1076 antioxidant to polyethylene glycol diacrylate modified mica powder is 1:0.2-0.4.

[0039] Specifically, mica powder is a layered silicate with a structure consisting of a compound silicon oxide layer composed of two layers of silicon oxide tetrahedrons sandwiching a layer of aluminum oxide octahedron. The mica powder is modified by using polyethylene glycol diacrylate. The surface of the mica powder particles contains active groups such as hydroxyl groups, which can react with polyethylene glycol diacrylate. At the same time, the surface of the mica powder has a strong adsorption capacity and can easily adsorb polyethylene glycol diacrylate on the surface. The polyethylene glycol diacrylate wraps the surface of the mica powder and is grafted in small amounts between the mica powder layers. This can reduce the surface energy of the mica powder, improve the compatibility between the mica powder and the bright asphalt, and make the modified mica powder more stable in the bright asphalt. The modified mica powder can not only improve the strength and toughness of the bright asphalt, but also improve the oxidation resistance of the bright asphalt. And they are entangled on the surface of mica powder. Mica powder has a layered structure. Polyethylene glycol diacrylate is grafted on the surface and interlayers of mica powder, so that the modified mica powder can be better dispersed in the bright asphalt, and the binding ability between the modified mica powder and the components in the bright asphalt is enhanced, and it has good compatibility with other components. Polyethylene glycol diacrylate is not only connected to the surface of mica powder, but also can adsorb 1076 antioxidants and LDHs, and embed other components into the structure of modified mica powder. The three work synergistically to improve the anti-aging property of bright asphalt, making the durability of bright asphalt stronger, while improving the strength of bright asphalt and the antioxidant property of bright asphalt, making the durability of bright asphalt stronger.

[0040] Optionally, the petroleum resin is one or more of C9 petroleum resin, C5 petroleum resin or coumarone resin.

[0041] Specifically, increasing the viscosity of the asphalt improves the performance of the asphalt, increases the viscosity and adhesion of the coating, and improves the waterproof effect. More preferably, a C9 type petroleum resin with a high softening point is used.

[0042] A method for preparing bright-colored asphalt for a highway tunnel, comprising:

[0043] Preheating step: Take cycloparaffinic oil by weight and preheat it at 150-160°C for 5-20 minutes.

[0044] Specifically, cyclohexane oil is used as solvent oil. The cyclohexane oil is first heated and melted, which is beneficial for subsequent uniform mixing of various component reactants and is beneficial for the reaction.

[0045] Insulation step: Add petroleum resin to the preheated cyclohexane oil and keep it in an oven at 150-160°C for 25 minutes.

[0046] Dispersion step: Place the molten mixture of naphthenic oil and petroleum resin in a heating device at 160° C. and stir until the petroleum resin is evenly dispersed in the naphthenic oil.

[0047] Specifically, petroleum resin is added to preheated cyclohexane oil and kept at 150-160° C., so that the petroleum resin can melt at high temperature to facilitate subsequent reactions. At the same time, the compatibility of each component is improved by stirring, which is conducive to efficient reaction.

[0048] Shearing step: EVA is added to the molten mixture after the dispersion step and sheared at a temperature of 165-175°C.

[0049] Specifically, the temperature is increased and EVA is added to ensure that the reaction efficiency is guaranteed while the materials are in a molten state. EVA can improve the compatibility between the components.

[0050] SBS modifier and compatibilizer adding steps: maintaining the temperature at 165-175° C., adding SBS modifier and compatibilizer, and shearing at a speed of 4500-5500 rad / min for 30-35 minutes until uniform dispersion.

[0051] Anti-aging agent adding step: cool to 150-160°C, and add 1076 antioxidant, LDHs and polyethylene glycol diacrylate modified mica powder in sequence, and shear again at a speed of 2000-2500 rad / min for 15-20 minutes to obtain a bright asphalt primary product.

[0052] Development steps: Place the initial bright-colored asphalt product in a 165°C oven for development for 1.5-2 hours to obtain bright-colored asphalt.

[0053] Specifically, SBS modifier, compatibilizer and anti-aging agent are added in sequence, and the components are uniformly mixed and reacted under stirring to jointly improve the anti-aging property of the bright color asphalt.

[0054] Optionally, in the shearing step, after adding EVA, shearing is performed at a speed of 1500-2000 rad / min for 5-10 min, and then at a speed of 3000-3500 rad / min for 20-25 min.

[0055] Specifically, after adding EVA, stirring is first performed at a relatively low speed so that the various component materials are evenly mixed, and then stirring is performed at a relatively high speed to shear the mixed materials, thereby improving the reaction efficiency and further increasing the production rate of bright asphalt.

[0056] Optionally, the preparation process of polyethylene glycol diacrylate modified mica powder includes:

[0057] (1) Dispersing mica powder in deionized water to obtain a first mica powder suspension.

[0058] (2) Add the first mica powder suspension into a grinder, heat to 40-90° C., and grind for 30 min-120 min to obtain a second mica powder suspension.

[0059] (3) Adding polyethylene glycol diacrylate to the second mica powder suspension, continuing grinding at a temperature of 45-95° C., reacting for 0.5-1.5 hours, and obtaining a water-containing modified mica powder.

[0060] (4) Drying the water-modified mica powder to obtain polyethylene glycol diacrylate modified mica powder.

[0061] Specifically, mica powder is first dispersed in deionized water to obtain a first mica powder suspension, and then the first mica powder suspension is ground to reduce the particle size of the mica powder, which can increase the specific surface area of ​​the mica powder and also increase the reaction area of ​​the mica powder and polyethylene glycol diacrylate, which is conducive to the reaction of the mica powder and polyethylene glycol diacrylate, so that more polyethylene glycol diacrylate is grafted to the surface and interlayer of the mica powder, which is conducive to the modification of the mica powder. After grinding, the first mica powder suspension is obtained, and the polyethylene glycol diacrylate is added to the second mica powder suspension, and the reaction is carried out during grinding, which can improve the modification efficiency of the mica powder and make the modification reaction more sufficient. The reaction temperature is 45-95°C, which ensures the efficient progress of the reaction.

[0062] More preferably, when preparing the second mica powder suspension, the first mica powder suspension is added to a grinder, an acid with a concentration of 0.05 mol / L is added, heated to 40-90°C, and ground for 30min-120min to obtain a second mica powder suspension of 0.05 mol / L. The acid is selected from hydrochloric acid or nitric acid. The addition of acid can activate the surface of the mica powder, increase the active groups on the surface of the mica powder, and increase the subsequent grafting probability of polyethylene glycol diacrylate on the surface of the mica powder, thereby improving the compatibility between the mica powder and the bright asphalt, and can also improve the strength and toughness of the bright asphalt, thereby increasing the service life of the bright asphalt. Among them, the volume weight ratio of acid to mica powder is 20-30mL:1g.

[0063] Optionally, in the first mica powder suspension, the weight ratio of deionized water to mica powder is 2-6:1.

[0064] Specifically, deionized water is used to disperse mica powder and provide a reaction solvent for the modification of mica powder, which is conducive to the efficient reaction. If the amount of deionized water is too little, the dispersion effect of mica powder is poor, which in turn affects the reaction effect. If the amount of deionized water is too much, it not only causes a waste of deionized water, but also makes the mica powder too dispersed and the effective reaction rate is reduced, and more time and labor are required in the drying process.

[0065] Optionally, the mass ratio of polyethylene glycol diacrylate to mica powder is 1:1.2-1.5.

[0066] Specifically, this ensures that the modification reaction of the mica powder is carried out stably without causing waste of polyethylene glycol diacrylate.

[0067] Optionally, the water-containing modified mica powder is vacuum dried to a moisture content of less than or equal to 8%.

[0068] Specifically, keeping the modified mica powder dry is beneficial to the stable reaction in the preparation of bright asphalt.

[0069] The technical solution of the present application is described in detail below with reference to specific embodiments.

[0070] Example 1

[0071] In this embodiment, the bright asphalt for highway tunnel and the preparation method thereof, the operation process during specific operation is as follows:

[0072] Preheating step: Take cycloparaffinic oil by weight and preheat it at 150-160°C for 5-20 minutes.

[0073] Insulation step: adding petroleum resin to the preheated cyclohexane oil and keeping it in an oven at 150-160°C for 25 minutes. The petroleum resin is C9 type petroleum resin.

[0074] Dispersion step: Place the molten mixture of naphthenic oil and petroleum resin in a heating device at 160° C. and stir until the petroleum resin is evenly dispersed in the naphthenic oil.

[0075] Shearing step: EVA is added to the molten mixture after the dispersion step, and sheared at a speed of 1500-2000 rad / min for 5-10 min at a temperature of 165-175° C., and then sheared at a speed of 3000-3500 rad / min for 20-25 min.

[0076] SBS modifier and compatibilizer adding steps: maintaining the temperature at 165-175° C., adding SBS modifier and compatibilizer, and shearing at a speed of 4500-5500 rad / min for 30-35 minutes until uniform dispersion.

[0077] Anti-aging agent adding steps: cool down to 150-160°C, and add 1076 antioxidant and LDHs in sequence, and shear again at a speed of 2000-2500 rad / min for 15-20 minutes to obtain a bright asphalt primary product.

[0078] Development steps: Place the initial bright-colored asphalt product in a 165°C oven for development for 1.5-2 hours to obtain bright-colored asphalt.

[0079] Among them, 30 parts by weight of naphthenic oil, 62 parts by weight of petroleum resin, 5 parts by weight of EVA resin, 33 parts by weight of SBS modifier, 22 parts by weight of anti-aging agent, and 1 part by weight of compatibilizer. The compatibilizer adopts furfural extracted oil, and the anti-aging agent includes 1076 antioxidant and LDHs in a weight ratio of 1:2.

[0080] Example 2

[0081] In this embodiment, the bright asphalt for highway tunnel and the preparation method thereof, the operation process during specific operation is as follows:

[0082] Preparation steps of polyethylene glycol diacrylate modified mica powder:

[0083] (1) Dispersing mica powder in deionized water to obtain a first mica powder suspension, wherein the weight ratio of deionized water to mica powder is 2:1.

[0084] (2) Add the first mica powder suspension into a grinder, add 0.05 mol / L hydrochloric acid, heat to 40-90° C., and grind for 30 min-120 min to obtain a second mica powder suspension.

[0085] (3) Adding polyethylene glycol diacrylate to the second mica powder suspension, grinding is continued at a temperature of 45-95° C., reacting for 0.5-1.5 hours, and obtaining water-containing modified mica powder. The mass ratio of polyethylene glycol diacrylate to mica powder is 1:1.2-1.5, and the volume weight ratio of hydrochloric acid to mica powder is 20 mL:1 g.

[0086] (4) Drying the water-containing modified mica powder until the moisture content is less than or equal to 8% to obtain polyethylene glycol diacrylate modified mica powder.

[0087] Preheating step: Take cycloparaffinic oil by weight and preheat it at 150-160°C for 5-20 minutes.

[0088] Insulation step: adding petroleum resin to the preheated cyclohexane oil and keeping it in an oven at 150-160°C for 25 minutes, the petroleum resin is C9 type petroleum resin.

[0089] Dispersion step: Place the molten mixture of naphthenic oil and petroleum resin in a heating device at 160° C. and stir until the petroleum resin is evenly dispersed in the naphthenic oil.

[0090] Shearing step: EVA is added to the molten mixture after the dispersion step, and sheared at a speed of 1500-2000 rad / min for 5-10 min at a temperature of 165-175° C., and then sheared at a speed of 3000-3500 rad / min for 20-25 min.

[0091] SBS modifier and compatibilizer adding steps: maintaining the temperature at 165-175° C., adding SBS modifier and compatibilizer, and shearing at a speed of 4500-5500 rad / min for 30-35 minutes until uniform dispersion.

[0092] Anti-aging agent adding step: cool to 150-160°C, and add 1076 antioxidant, LDHs and polyethylene glycol diacrylate modified mica powder in sequence, and shear again at a speed of 2000-2500 rad / min for 15-20 minutes to obtain a bright asphalt primary product.

[0093] Development steps: Place the initial bright-colored asphalt product in a 165°C oven for development for 1.5-2 hours to obtain bright-colored asphalt.

[0094] Among them, 31.2 parts by weight of naphthenic oil, 63.8 parts by weight of petroleum resin, 6 parts by weight of EVA resin, 4 parts by weight of SBS modifier, 2 parts by weight of anti-aging agent, and 1 part by weight of compatibilizer. The compatibilizer is furfural extracted oil, and the anti-aging agent is composed of 1076 antioxidant, LDHs and modified mica powder in a weight ratio of 1:2:0.2.

[0095] Example 3

[0096] In this embodiment, the bright asphalt for highway tunnel and the preparation method thereof, the operation process during specific operation is as follows:

[0097] The difference from Example 1 is that:

[0098] Preparation steps of polyethylene glycol diacrylate modified mica powder:

[0099] (1) Dispersing mica powder in deionized water to obtain a first mica powder suspension, wherein the weight ratio of deionized water to mica powder is 3:1.

[0100] (2) The first mica powder suspension was added to a grinder, hydrochloric acid with a concentration of 0.05 mol / L was added, heated to 50° C., and ground for 30 min to obtain a second mica powder suspension.

[0101] (3) Adding polyethylene glycol diacrylate to the second mica powder suspension, grinding is continued at a temperature of 55° C., reacting for 0.5-1.5 hours, and obtaining water-modified mica powder. The mass ratio of polyethylene glycol diacrylate to mica powder is 1:1.3, and the volume weight ratio of hydrochloric acid to mica powder is 22 mL:1 g.

[0102] Preheating step: Take cycloparaffinic oil by weight and preheat it at 160°C for 15 minutes.

[0103] Insulation step: adding petroleum resin to the preheated cyclohexane oil and keeping it in an oven at 160°C for 25 minutes. The petroleum resin is C9 type petroleum resin.

[0104] Dispersion step: Place the molten mixture of naphthenic oil and petroleum resin in a heating device at 160° C. and stir until the petroleum resin is evenly dispersed in the naphthenic oil.

[0105] Shearing step: EVA was added to the molten mixture after the dispersion step, and the mixture was sheared at a speed of 2000 rad / min for 8 min and then at a speed of 3000 rad / min for 25 min at a temperature of 170°C.

[0106] SBS modifier and compatibilizer addition steps: maintain the temperature at 170° C., add SBS modifier and compatibilizer, and shear at a speed of 5500 rad / min for 35 minutes until they are evenly dispersed.

[0107] Anti-aging agent adding steps: cool down to 155°C, and add 1076 antioxidant, LDHs and polyethylene glycol diacrylate modified mica powder in sequence, and shear again at a speed of 2000 rad / min for 20 minutes to obtain a bright asphalt preliminary product.

[0108] Development steps: Place the initial bright-colored asphalt product in a 165°C oven for development for 1.5-2 hours to obtain bright-colored asphalt.

[0109] Among them, 33.3 parts by weight of naphthenic oil, 66.7 parts by weight of petroleum resin, 8 parts by weight of EVA resin, 4 parts by weight of SBS modifier, 3 parts by weight of anti-aging agent, and 1.5 parts by weight of compatibilizer. The compatibilizer is furfural extracted oil, and the anti-aging agent is composed of 1076 antioxidant, LDHs and modified mica powder in a weight ratio of 1:2.5:0.25.

[0110] Example 4

[0111] In this embodiment, the bright asphalt for highway tunnel and the preparation method thereof, the operation process during specific operation is as follows:

[0112] The difference from Example 1 is that:

[0113] Preparation steps of polyethylene glycol diacrylate modified mica powder:

[0114] (1) Dispersing mica powder in deionized water to obtain a first mica powder suspension, wherein the weight ratio of deionized water to mica powder is 4:1.

[0115] (2) The first mica powder suspension was added to a grinder, 0.05 mol / L nitric acid was added, the mixture was heated to 60° C., and ground for 120 min to obtain a second mica powder suspension.

[0116] (3) Adding polyethylene glycol diacrylate to the second mica powder suspension, grinding is continued at a temperature of 65° C., reacting for 0.5-1.5 hours, and obtaining water-modified mica powder. The mass ratio of polyethylene glycol diacrylate to mica powder is 1:1.4, and the volume weight ratio of nitric acid to mica powder is 24 mL:1 g.

[0117] Preheating step: Take cycloparaffinic oil by weight and preheat it at 155°C for 15 minutes.

[0118] Insulation step: adding petroleum resin to the preheated cyclohexane oil and keeping it in an oven at 155°C for 20 minutes. The petroleum resin is C9 type petroleum resin.

[0119] Dispersion step: Place the molten mixture of naphthenic oil and petroleum resin in a heating device at 160° C. and stir until the petroleum resin is evenly dispersed in the naphthenic oil.

[0120] Shearing step: EVA was added to the molten mixture after the dispersion step, and the mixture was sheared at a speed of 1800 rad / min for 10 min and then at a speed of 3500 rad / min for 20 min at a temperature of 175°C.

[0121] SBS modifier and compatibilizer addition steps: maintain the temperature at 175° C., add SBS modifier and compatibilizer, and shear at a speed of 5500 rad / min for 35 minutes until uniform dispersion.

[0122] Anti-aging agent adding steps: cool down to 160°C, and add 1076 antioxidant, LDHs and polyethylene glycol diacrylate modified mica powder in sequence, and shear again at a speed of 2500 rad / min for 15 minutes to obtain a bright asphalt preliminary product.

[0123] Development steps: Place the initial bright-colored asphalt product in a 170°C oven for development for 1.5-2 hours to obtain bright-colored asphalt.

[0124] Among them, 33.3 parts by weight of naphthenic oil, 66.7 parts by weight of petroleum resin, 10 parts by weight of EVA resin, 5 parts by weight of SBS modifier, 3 parts by weight of anti-aging agent, and 1.5 parts by weight of compatibilizer. The compatibilizer is furfural extracted oil, and the anti-aging agent is composed of 1076 antioxidant, LDHs and modified mica powder in a weight ratio of 1:3:0.3.

[0125] Example 5

[0126] In this embodiment, the bright asphalt for highway tunnel and the preparation method thereof, the operation process during specific operation is as follows:

[0127] The difference from Example 1 is that:

[0128] Preparation steps of polyethylene glycol diacrylate modified mica powder:

[0129] (1) Dispersing mica powder in deionized water to obtain a first mica powder suspension, wherein the weight ratio of deionized water to mica powder is 2-5:1.

[0130] (2) The first mica powder suspension was added to a grinder, 0.05 mol / L nitric acid was added, the mixture was heated to 70° C., and ground for 120 min to obtain a second mica powder suspension.

[0131] (3) Adding polyethylene glycol diacrylate to the second mica powder suspension, grinding is continued at a temperature of 75° C., reacting for 0.5-1.5 hours, and obtaining water-modified mica powder. The mass ratio of polyethylene glycol diacrylate to mica powder is 1:1.4, and the volume weight ratio of nitric acid to mica powder is 27 mL:1 g.

[0132] (4) Drying the water-containing modified mica powder until the moisture content is less than or equal to 8% to obtain modified mica powder.

[0133] Preheating step: Take cycloparaffinic oil by weight and preheat it at 160°C for 20 minutes.

[0134] Insulation step: adding petroleum resin to the preheated cyclohexane oil and keeping it in an oven at 160°C for 25 minutes. The petroleum resin is C9 type petroleum resin.

[0135] Dispersion step: Place the molten mixture of naphthenic oil and petroleum resin in a heating device at 160° C. and stir until the petroleum resin is evenly dispersed in the naphthenic oil.

[0136] Shearing step: EVA was added to the molten mixture after the dispersion step, and the mixture was sheared at a speed of 2000 rad / min for 10 min and then at a speed of 3500 rad / min for 20 min at a temperature of 165°C.

[0137] SBS modifier and compatibilizer addition steps: maintain the temperature at 165° C., add SBS modifier and compatibilizer, and shear at a speed of 5500 rad / min for 30 minutes until they are evenly dispersed.

[0138] Anti-aging agent adding steps: cool down to 155°C, and add 1076 antioxidant, LDHs and polyethylene glycol diacrylate modified mica powder in sequence, and shear again at a speed of 2500 rad / min for 20 minutes to obtain a bright asphalt preliminary product.

[0139] Development steps: Place the initial bright-colored asphalt product in a 165°C oven for development for 1.5-2 hours to obtain bright-colored asphalt.

[0140] Among them, 37.5 weight parts of naphthenic oil, 67.3 weight parts of petroleum resin, 10 weight parts of EVA resin, 5 weight parts of SBS modifier, 4 weight parts of anti-aging agent, and 1.2 weight parts of compatibilizer. The compatibilizer adopts furfural extracted oil, and the anti-aging agent is composed of 1076 antioxidant, LDHs and modified mica powder in a weight ratio of 1:4:0.4.

[0141] Example 6

[0142] In this embodiment, the bright asphalt for highway tunnel and the preparation method thereof, the operation process during specific operation is as follows:

[0143] The difference from Example 1 is that:

[0144] Preparation steps of polyethylene glycol diacrylate modified mica powder:

[0145] (1) Dispersing mica powder in deionized water to obtain a first mica powder suspension, wherein the weight ratio of deionized water to mica powder is 6:1.

[0146] (2) The first mica powder suspension was added to a grinder, 0.05 mol / L nitric acid was added, the mixture was heated to 90° C., and ground for 120 min to obtain a second mica powder suspension.

[0147] (3) Adding polyethylene glycol diacrylate to the second mica powder suspension, grinding is continued at a temperature of 95° C., reacting for 0.5-1.5 hours, and obtaining water-modified mica powder. The mass ratio of polyethylene glycol diacrylate to mica powder is 1:1.5, and the volume weight ratio of nitric acid to mica powder is 30 mL:1 g.

[0148] (4) Drying the water-containing modified mica powder until the moisture content is less than or equal to 8% to obtain modified mica powder.

[0149] Preheating step: Take cycloparaffinic oil by weight and preheat it at 160°C for 20 minutes.

[0150] Insulation step: adding petroleum resin to the preheated cyclohexane oil and keeping it in an oven at 160°C for 25 minutes. The petroleum resin is C9 type petroleum resin.

[0151] Dispersion step: Place the molten mixture of naphthenic oil and petroleum resin in a heating device at 160° C. and stir until the petroleum resin is evenly dispersed in the naphthenic oil.

[0152] Shearing step: EVA was added to the molten mixture after the dispersion step, and the mixture was sheared at a speed of 2000 rad / min for 10 min and then at a speed of 3500 rad / min for 25 min at a temperature of 175°C.

[0153] SBS modifier and compatibilizer addition steps: maintain the temperature at 175° C., add SBS modifier and compatibilizer, and shear at a speed of 5500 rad / min for 35 minutes until uniform dispersion.

[0154] Anti-aging agent adding steps: cool down to 160°C, and add 1076 antioxidant, LDHs and polyethylene glycol diacrylate modified mica powder in sequence, and shear again at a speed of 2500 rad / min for 20 minutes to obtain a bright asphalt preliminary product.

[0155] Development steps: Place the initial bright-colored asphalt product in a 165°C oven for development for 1.5-2 hours to obtain bright-colored asphalt.

[0156] Among them, 38 parts by weight of naphthenic oil, 68 parts by weight of petroleum resin, 8 parts by weight of EVA resin, 5 parts by weight of SBS modifier, 4 parts by weight of anti-aging agent, and 2 parts by weight of compatibilizer. The compatibilizer adopts furfural extracted oil, and the anti-aging agent is composed of 1076 antioxidant, LDHs and modified mica powder in a weight ratio of 1:4:0.4.

[0157] Comparative Example 1

[0158] In this embodiment, the bright asphalt for highway tunnel and the preparation method thereof, the operation process during specific operation is as follows:

[0159] The difference from Example 4 is that:

[0160] Preparation steps of polyethylene glycol diacrylate modified mica powder:

[0161] (1) Dispersing mica powder in deionized water to obtain a first mica powder suspension, wherein the weight ratio of deionized water to mica powder is 7:1.

[0162] (2) The first mica powder suspension was added to a grinder, 0.05 mol / L nitric acid was added, the mixture was heated to 60° C., and ground for 120 min to obtain a second mica powder suspension.

[0163] (3) Adding polyethylene glycol diacrylate to the second mica powder suspension, grinding is continued at a temperature of 65° C., reacting for 0.5-1.5 hours, and obtaining water-modified mica powder. The mass ratio of polyethylene glycol diacrylate to mica powder is 1:1.6, and the volume weight ratio of nitric acid to mica powder is 31 mL:1 g.

[0164] Among them, 33.3 parts by weight of naphthenic oil, 66.7 parts by weight of petroleum resin, 8 parts by weight of EVA resin, 4 parts by weight of SBS modifier, 3 parts by weight of anti-aging agent, and 1.5 parts by weight of compatibilizer. The compatibilizer is furfural extracted oil, and the anti-aging agent is composed of 1076 antioxidant, LDHs and modified mica powder in a weight ratio of 1:3:0.4.

[0165] Comparative Example 2

[0166] In this embodiment, the bright asphalt for highway tunnel and the preparation method thereof, the operation process during specific operation is as follows:

[0167] The difference from Example 4 is that:

[0168] Preparation steps of polyethylene glycol diacrylate modified mica powder:

[0169] (1) Dispersing mica powder in deionized water to obtain a first mica powder suspension, wherein the weight ratio of deionized water to mica powder is 1:1.

[0170] (2) The first mica powder suspension was added to a grinder, 0.05 mol / L nitric acid was added, the mixture was heated to 60° C., and ground for 120 min to obtain a second mica powder suspension.

[0171] (3) Adding polyethylene glycol diacrylate to the second mica powder suspension, grinding is continued at a temperature of 65° C., reacting for 0.5-1.5 hours, and obtaining water-modified mica powder. The mass ratio of polyethylene glycol diacrylate to mica powder is 1:1.0, and the volume weight ratio of nitric acid to mica powder is 19 mL:1 g.

[0172] Among them, 33.3 parts by weight of naphthenic oil, 66.7 parts by weight of petroleum resin, 8 parts by weight of EVA resin, 4 parts by weight of SBS modifier, 3 parts by weight of anti-aging agent, and 1.5 parts by weight of compatibilizer. The compatibilizer is furfural extracted oil, and the anti-aging agent is composed of 1076 antioxidant, LDHs and modified mica powder in a weight ratio of 1:3:0.1.

[0173] Comparative Example 3

[0174] In this embodiment, the bright asphalt for highway tunnel and the preparation method thereof, the operation process during specific operation is as follows:

[0175] The difference from Example 4 is that:

[0176] No antioxidants added.

[0177] Among them, 33.3 weight parts of naphthenic oil, 66.7 weight parts of petroleum resin, 10 weight parts of EVA resin, 5 weight parts of SBS modifier, and 1.5 weight parts of compatibilizer are used. The compatibilizer is furfural extracted oil.

[0178] Experimental example

[0179] The bright asphalt products prepared by the methods of Examples 1 to 5 and Comparative Examples 1 to 5 were tested. The test methods were based on the relevant requirements in the "Testing Procedures for Asphalt and Asphalt Mixtures for Highway Engineering" (JTG E20-2011). The test results are shown in Table 1:

[0180] Table 1

[0181]

[0182]

[0183] From the test results of needle penetration, ductility and softening point in Table 1, it can be seen that the light-colored asphalt in the above embodiments and control examples has good performance in various road performances and has good properties. Among them, the softening point of the light-colored asphalt in Examples 2 to 6 is higher, indicating that the light-colored asphalt has good strength and high-temperature performance. The ductility in Examples 2 to 6 is relatively large, indicating that the light-colored asphalt has good deformation resistance, crack resistance and low-temperature performance, and can effectively resist pavement cracking caused by temperature changes. Combined with the above test data, it can be seen that the various indicators of the light-colored asphalt in Examples 3 and 4 have reached the relevant requirements of SBS IC modified asphalt in the "Technical Specifications for Highway Asphalt Pavement Construction" JTG F40, and not only has the functionality of light-colored asphalt, but also has the excellent performance of SBS modified asphalt.

[0184] Through the RTFOT aging test, it can be seen that the mass loss of the bright asphalt products prepared by the methods of Examples 2 to 6 is significantly smaller than that of Comparative Examples 1 to 3, which shows that the embodiments of the present application not only have good road performance, but also have certain durability.

[0185] From Example 2 to Example 6, it is known that the addition of polyethylene glycol diacrylate modified mica powder reduces mass loss, increases the penetration ratio, and significantly improves the anti-aging performance of bright asphalt. The lower the sensitivity of asphalt to temperature, the wider the use temperature range of bright asphalt, and the longer the service life of bright asphalt. At the same time, compared with Comparative Example 3, it is shown that polyethylene glycol diacrylate modified mica powder can adsorb 1076 antioxidant and LDHs, and the three act synergistically, and embed other components into the modified mica powder structure, which jointly improves the anti-aging performance of bright asphalt, making the durability of bright asphalt stronger and extending the service life of bright asphalt.

[0186] The above description is only a preferred embodiment of the present application and is not intended to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are included in the protection scope of the present application.

[0187] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A bright asphalt for highway tunnels, characterized in that: The bright asphalt comprises the following components in parts by weight: 30-38 parts by weight of naphthenic oil, 62-70 parts by weight of petroleum resin, 5-10 parts by weight of EVA resin, 3-5 parts by weight of SBS modifier, 2-4 parts by weight of anti-aging agent, and 1-2 parts by weight of compatibilizer; The compatibilizer is furfural extracted oil, and the anti-aging agent includes 1076 antioxidant and LDHs in a weight ratio of 1:2-4.

2. The bright color asphalt for highway tunnel according to claim 1, characterized in that: The anti-aging agent also includes polyethylene glycol diacrylate modified mica powder, and the weight ratio of the 1076 antioxidant to the polyethylene glycol diacrylate modified mica powder is 1:0.2-0.

4.

3. The bright color asphalt for highway tunnel according to claim 1, characterized in that: The petroleum resin is one or more of C9 petroleum resin, C5 petroleum resin or coumarone resin.

4. A method for preparing bright-colored asphalt for highway tunnels according to any one of claims 1 to 3, characterized in that: include: Preheating step: taking the naphthenic oil by weight and preheating it at 150-160° C. for 5-20 minutes; Insulation step: adding the petroleum resin to the preheated naphthenic oil and keeping it in an oven at 150-160° C. for 25 minutes; Dispersing step: placing the molten mixture of the naphthenic oil and the petroleum resin in a heating device at 160° C. and stirring until the petroleum resin is evenly dispersed in the naphthenic oil; Shearing step: adding the EVA to the molten mixture after the dispersing step, and shearing at a temperature of 165-175° C.; SBS modifier and compatibilizer adding steps: maintaining the temperature at 165-175°C, adding SBS modifier and compatibilizer, and shearing at a speed of 4500-5500 rad / min for 30-35 minutes until uniform dispersion; Anti-aging agent adding step: cooling to 150-160° C., and sequentially adding the 1076 antioxidant, the LDHs and the polyethylene glycol diacrylate modified mica powder, and shearing again at a speed of 2000-2500 rad / min for 15-20 min to obtain a primary bright asphalt product; Development step: Place the bright-colored asphalt product in an oven at 165° C. for 1.5-2 hours to obtain bright-colored asphalt.

5. The method for preparing bright-colored asphalt for highway tunnels according to claim 4, characterized in that: In the shearing step, after adding the EVA, shearing is first performed at a speed of 1500-2000 rad / min for 5-10 min, and then at a speed of 3000-3500 rad / min for 20-25 min.

6. The method for preparing bright-colored asphalt for highway tunnels according to claim 4, characterized in that: The preparation process of the polyethylene glycol diacrylate modified mica powder comprises: (1) dispersing mica powder in deionized water to obtain a first mica powder suspension; (2) adding the first mica powder suspension into a grinder, heating to 40-90° C., and grinding for 30 min-120 min to obtain a second mica powder suspension; (3) adding polyethylene glycol diacrylate to the second mica powder suspension, continuing grinding at a temperature of 45-95° C., reacting for 0.5-1.5 hours, and obtaining a water-containing modified mica powder; (4) Drying the water-containing modified mica powder to obtain polyethylene glycol diacrylate modified mica powder.

7. The method for preparing bright-colored asphalt for highway tunnels according to claim 6, characterized in that: In the first mica powder suspension, the weight ratio of the deionized water to the mica powder is 2-6:

1.

8. The method for preparing bright-colored asphalt for highway tunnels according to claim 7, characterized in that: The mass ratio of the polyethylene glycol diacrylate to the mica powder is 1:1.2-1.

5.

9. The method for preparing bright-colored asphalt for highway tunnels according to claim 8, characterized in that: The water-containing modified mica powder is vacuum dried until the moisture content is less than or equal to 8%.

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