Viscosity-time-temperature controllable and adjustable epoxy asphalt and use method thereof

Abstract

The invention belongs to the field of bridge and tunnel paving materials, and particularly relates to viscosity-time-temperature controllable and adjustable epoxy asphalt and a use method thereof. The composite material is composed of reaction-adjustable epoxy resin, a reaction-adjustable curing agent, reaction-type isolation oil and active asphalt, wherein the reaction-adjustable epoxy resin comprises 10-20 parts of high-activity epoxy resin, 30-50 parts of low-activity epoxy resin and 4-8 parts of reaction-type amino gas silicon; the reaction adjustable curing agent comprises 20-30 parts of a curing agent, 4-8 parts of reaction type epoxy group gas silicon and 1-5 parts of a medium temperature accelerant; the reaction type isolation oil comprises 30-40 parts of isolation oil and 5-10 parts of a core-shell type accelerant. The reaction type gas silicon provided by the invention and epoxy form a thixotropic network and synergistic curing network system, so that the viscosity regulation and control at the stages of mixing, transporting, paving and rolling are realized; the core-shell type accelerant is released in the rolling stage and is rapidly cured in the curing stage, and finally controllable adjustment of viscosity-time-temperature in the whole construction process of the epoxy asphalt material is achieved.

Description

Technical Field

[0001] The invention relates to the field of bridge and tunnel paving materials, and in particular to a viscosity-time-temperature controllable adjustable epoxy asphalt and a use method thereof. Background Art

[0002] In recent years, epoxy resin, as a thermosetting material with excellent performance, has been widely used in high-performance heavy-load pavement in the field of bridge and tunnel paving materials. However, as a reactive resin, the reaction viscosity of epoxy resin changes significantly with time and temperature. During the paving process, it is necessary to regulate the viscosity-time-temperature development of mixing, transportation, paving, rolling and curing in multiple stages, making construction control difficult.

[0003] In actual projects, epoxy resin, curing agent, asphalt and stone are usually added to the mixing tank at the same time for mixing. This process makes it difficult to take into account the reactivity of epoxy, the compatibility of epoxy asphalt and the stability of epoxy asphalt mixture at the same time. First, in the early stage of high-temperature mixing and transportation, the viscosity of epoxy is low, and it is easy to have problems such as segregation and phase separation. Secondly, the transportation time of the mixture fluctuates greatly, which makes it difficult to control the viscosity development in the rolling stage, which can easily cause problems such as poor construction uniformity and road diseases. In addition, the viscosity in the rolling stage needs to be within an appropriate range, so it is necessary to reduce the reaction rate of epoxy in the high-temperature mixing and transportation stage; after rolling, the viscosity needs to rise rapidly to the level that can be opened to traffic, so it is necessary to increase the reaction rate of epoxy after low-temperature rolling. Achieving the matching of epoxy asphalt reactivity and viscosity with actual construction in different stages is an urgent problem that needs to be solved.

[0004] The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art known to those skilled in the art. Summary of the invention

[0005] The first object of the present invention is to provide a viscosity-time-temperature controllable epoxy asphalt. The material increases the viscosity of the mixing section by pre-mixing epoxy and reactive gas silicon, and makes the rolling effect controllable through controllable conditions of the viscosity of the epoxy asphalt, thereby reducing the rolling sensitivity of the rolling section (the degree to which the rolling effect of the epoxy asphalt mixture is affected by the viscosity variation range of the epoxy asphalt), and uses active asphalt to improve the phase stability of the transportation section. It also achieves stable reaction at high temperature and rapid curing at low temperature by using different active epoxy resins and core-shell accelerators, ultimately achieving controllable viscosity-time-temperature regulation of the epoxy asphalt in different stages.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions:

[0007] A viscosity-time-temperature controllable epoxy asphalt, the epoxy asphalt is composed of a reaction-adjustable epoxy resin, a reaction-adjustable curing agent, a reaction-type isolation oil, and an active asphalt;

[0008] The reaction adjustable epoxy resin comprises the following components by weight:

[0009] 10-20 parts of highly active epoxy resin;

[0010] 30-50 parts of low-activity epoxy resin;

[0011] 4 to 8 parts of reactive amino silicon;

[0012] The reaction adjustable curing agent comprises the following components by weight:

[0013] 20-30 parts of curing agent;

[0014] 4 to 8 parts of reactive epoxy-based gas silicon;

[0015] 1 to 5 parts of medium temperature accelerator;

[0016] Reactive isolation oil includes the following components by weight:

[0017] 30-40 parts of isolation oil;

[0018] 5-10 parts of core-shell accelerator;

[0019] In the present invention, reactive amino-based silica is arranged in the reaction-adjustable epoxy resin, and reactive epoxy-based silica is arranged in the reaction-adjustable curing agent. By adjusting the viscosity and reaction rate in the initial stage, the epoxy asphalt maintains good construction and workability during the construction process, effectively controls the curing time and reaction rate, ensures that the epoxy asphalt can be constructed under different temperatures and environmental conditions, and achieves rapid curing after paving and rolling.

[0020] In the present invention, the reaction-adjustable epoxy resin, the reaction-adjustable curing agent, the reactive isolation oil, and the active asphalt interact with each other to form an optimized curing system. The reaction-adjustable epoxy resin and the reaction-adjustable curing agent form a strong cross-linked structure through chemical reaction, the reactive isolation oil delays the curing process to make the construction smoother, and the active asphalt can provide compatibility. The coordination of these components ensures that the material has appropriate viscosity, compatibility and reactivity in different stages such as construction, transportation, and rolling, thereby achieving controllable adjustment of viscosity-time-temperature and improving the final performance.

[0021] Furthermore, reactive amino silicones and reactive epoxy silicones can regulate the viscosity in different stages of construction. In the epoxy premixing stage, reactive amino silicones can form a thixotropic network and an epoxy synergistic curing network system; in the mixing stage, reactive epoxy silicones and epoxy curing network systems can improve the stability with the asphalt phase; in the transportation stage, reactive amino silicones, reactive epoxy silicones and epoxy asphalt react to form an organic-inorganic cross-linking network; in the rolling stage, the organic-inorganic cross-linking network can control the rolling viscosity within an appropriate range, thereby improving the rolling sensitivity and ensuring the construction quality during the paving process.

[0022] Furthermore, the reactive amino silica is prepared by reacting fumed silica and N-cyclohexylhydroxylamine in an organic solvent; the specific preparation method is to dissolve 5 parts of fumed silica in 20 parts of xylene, then add 3 parts of N-cyclohexylhydroxylamine, heat under reflux at 120°C for 2 to 3 hours, separate and dry the product, and obtain the reactive amino silica.

[0023] Furthermore, the reactive epoxy-based silica is prepared by reacting fumed silica and 4-hydroxybutyl acrylate glycidyl ether in an organic solvent; the specific preparation method is to dissolve 5 parts of fumed silica in xylene, then add 3 parts of 4-hydroxybutyl acrylate glycidyl ether, heat and reflux at 120°C for 2 to 3 hours, separate and dry the product, and obtain the reactive epoxy-based silica.

[0024] Furthermore, the high-activity epoxy resin is one or more of neopentyl glycol diglycidyl ether, 1,4-butanediol glycidyl ether, and 1,6-hexanediol diglycidyl ether, with a molecular weight of 200 to 1000. The molecular chain segments with a molecular weight of 200 to 1000 have high movement activity, ensuring the high reactivity of the epoxy resin; the low-activity epoxy resin is one or more of aliphatic glycidyl ether epoxy resin, polyphenol glycidyl ether epoxy resin, and aliphatic epoxidized olefin compounds, with a molecular weight of 5000 to 10000. The molecular chain segments with a molecular weight of 5000 to 10000 are long, and their movement is hindered in the reaction system, resulting in low reactivity of the epoxy resin.

[0025] Furthermore, the curing agent is one or more of imidazole, alicyclic amine, and tertiary amine salt; the activation energy of the reaction between the curing agent and the epoxy resin at 165-180°C is 50-60 kJ / mol, which can reduce the reaction rate in high-temperature mixing and transportation and regulate the rolling viscosity.

[0026] Furthermore, the medium-temperature accelerator is one or more of tertiary amine, resorcinol, and aminophenol; the activation energy of the reaction between the medium-temperature accelerator and the epoxy system is 30 to 40 kJ / mol, and the activation energy of 30 to 40 kJ / mol can satisfy the rapid reaction of the high-activity epoxy resin during medium-temperature pre-curing.

[0027] Furthermore, the core-shell type accelerator is prepared by adding a room temperature accelerator to a poor solvent to form microspheres, and the nano-silicon dioxide generated by the hydrolysis of tetraethyl silicate is grown in situ on the surface of the microspheres and then amino-modified; the specific preparation method is to stir and disperse 10 parts of polythiol in 30 parts of ammonia water, and then add 20 parts of deionized water, the solution presents a milky white suspension, and 10 parts of tetraethyl silicate are added to the suspension in batches, and the reaction is stirred at room temperature for 4 to 5 hours, and finally centrifuged, washed and dried to obtain a core-shell type accelerator. Preferably, the reaction activation energy of the room temperature accelerator and epoxy is 15 to 20 kJ / mol, and the activation energy of 15 to 20 kJ / mol can meet the rapid reaction of low-activity epoxy resin at room temperature; under the rolling action of the core-shell type accelerator, the shell structure is broken, and the internal accelerator is released, so that rapid curing in the curing stage is achieved, which greatly shortens the time that can be opened to traffic.

[0028] Furthermore, the core-shell type accelerator is added to the isolation oil and stirred evenly to obtain the reactive isolation oil. The reactive isolation oil is added during paving to avoid the destruction of the core-shell type accelerator during the mixing and transportation stage and to improve the permeability of the core-shell accelerator. In the reactive isolation oil, the aminosilica shell of the core-shell type accelerator reacts with the isolation oil to improve the uniformity of dispersion and prevent sinking. The isolation oil is one or more of epoxy bio-oil, epoxy linseed oil, epoxy castor oil, and epoxy soybean oil. The viscosity of the isolation oil is 0.2 to 0.5 Pa·s, which can meet the high permeability, facilitates the core-shell room temperature accelerator to fully contact with the mixture, and the epoxy group of the isolation oil can participate in the reaction of the epoxy curing network system.

[0029] Furthermore, the active asphalt is obtained by modifying the base asphalt with a reactive compatibilizer; the reactive compatibilizer is one or more of a long-chain aliphatic dibasic acid, a long-chain alkylphenol, and a long-chain alkyl imidazoline. The reactive compatibilizer can increase the polarity of the asphalt and react with epoxy to improve the compatibility of the asphalt with the epoxy resin.

[0030] The second object of the present invention is to provide a method for preparing and using a viscosity-time-temperature controllable adjustable epoxy asphalt, which has the same technical effect.

[0031] A method for using a viscosity-time-temperature controllable epoxy asphalt, comprising the following steps:

[0032] S1, premixing a reaction-adjustable epoxy resin and a reaction-adjustable curing agent to form an epoxy premix;

[0033] Furthermore, a high-activity epoxy resin, a low-activity epoxy resin, and a reactive amino-based gas silica are shear-dispersed to obtain a reaction-adjustable epoxy resin; a curing agent, a reactive epoxy-based gas silica, and a medium-temperature accelerator are shear-dispersed to obtain a reaction-adjustable curing agent; the reaction-adjustable epoxy resin and the reaction-adjustable curing agent are premixed at 100-120° C. for 10 minutes to obtain an epoxy premix; by adjusting the temperature and premixing time, the starting timing and curing speed of the reaction process can be controlled, thereby ensuring that the material has good fluidity and adaptability during construction, and has good strength and stability after curing.

[0034] S2. Mixing the active asphalt and the stone at 165-180° C. to form an active asphalt mixture; mixing at high temperature helps the active asphalt and the stone to fully combine, ensuring that the active asphalt can completely wet the surface of the stone. In the present invention, the active asphalt is modified by a reactive compatibilizer and has better bonding properties than ordinary asphalt. Under high temperature conditions, the bonding force of the active asphalt is enhanced, and the stone can be effectively coated and the bonding strength of the asphalt mixture is improved.

[0035] S3. Adding epoxy premix to active asphalt mixture and mixing at high temperature to obtain viscosity-time-temperature controllable epoxy asphalt mixture; the addition of epoxy premix can maintain a lower viscosity at high temperature, making the mixture easier to lay during the construction process.

[0036] S4. Add reactive isolation oil during paving. The reactive isolation oil has a core-shell structure with a silicon dioxide shell and a room-temperature accelerator core. It helps to maintain the stability of the isolation oil during high-temperature paving and gradually releases its effect during subsequent rolling and curing. The reactive isolation oil provides an immediate isolation effect during the construction process and can gradually achieve its stable viscosity adjustment effect when the mixture is cooled and cured, thereby ensuring the durability of the road surface in the later stage.

[0037] S5. Rolling. The addition of reactive isolation oil can optimize the rolling performance of the mixture. The isolation oil can reduce the adhesion of the mixture to the rolling roller during the rolling process, making the rolling process smoother and avoiding the adhesion of asphalt materials on the surface of the rolling roller, thereby ensuring the uniformity and density of the mixture during rolling. The core-shell accelerator can be gradually released during the rolling process to adjust the viscosity of the material, so that the material maintains moderate fluidity during the rolling stage and provides the required reaction activation energy in the later curing process.

[0038] S6, maintain health at normal temperature, open to traffic;

[0039] Furthermore, the viscosity-time-temperature controllable adjustable epoxy asphalt has a viscosity of 0.5-1 Pa·s in the mixing and transportation stage; a viscosity of 1-2 Pa·s in the paving stage; and a viscosity of 2-3 Pa·s, 3-10 Pa·s and 10-200 Pa·s in the initial compaction, repeated compaction and final compaction stages respectively; and can reach the level of being open to traffic after curing at room temperature for one day.

[0040] The present invention maintains a low viscosity during the mixing and paving stages, and during the rolling stage, as the rolling temperature gradually decreases, the viscosity of the mixture gradually increases, which helps to achieve a better compaction effect. Viscosity control at different stages can effectively avoid premature solidification or over-compaction during the rolling process.

[0041] Beneficial effects:

[0042] (1) In the mixing stage of the viscosity-time-temperature controllable epoxy asphalt provided by the present invention, reactive amino silicon and reactive epoxy silicon form an inorganic thixotropic network in the epoxy premix to adjust the viscosity to 0.5-1 Pa·s; in the transportation stage, the active asphalt improves the phase stability; in the rolling stage, the viscosity is adjusted to 1-200 Pa·s through the inorganic-organic synergistic effect of epoxy, reactive amino silicon and reactive epoxy silicon; after rolling, the core-shell accelerator is released to achieve rapid curing, and the open traffic intensity can be reached after curing for 1 day.

[0043] (2) The reactive amino-based silicone and reactive epoxy-based silicone provided by the present invention form an inorganic thixotropic network in the epoxy premix, wherein the epoxy and amino groups of the side chains participate in the epoxy curing reaction to further enhance the synergistic effect of the inorganic-organic hybrid network, thereby reducing the rolling sensitivity and increasing the plasticity.

[0044] (3) During the mixing stage of the epoxy asphalt provided by the present invention, the high-activity epoxy resin preferentially reacts under the action of the medium-temperature accelerator to form a cured network system with a low cross-linking density, thereby increasing the initial viscosity; during the transportation stage, the low-activity epoxy resin reacts slowly with the medium-temperature accelerator, thereby regulating the viscosity within a range suitable for rolling; during the rolling and curing stages, the low-activity epoxy resin is rapidly cured under the action of the core-shell type room-temperature accelerator, thereby achieving rapid curing.

[0045] (4) The epoxy group of the isolation oil in the reactive isolation oil provided by the present invention can participate in the epoxy reaction, wherein the core-shell type accelerator slowly releases the room temperature accelerator under pressure, and realizes rapid curing at room temperature with the low-activity epoxy resin. The addition of reactive isolation oil in the paving stage can avoid the destruction of the core-shell accelerator structure during mixing, and with the help of the high permeability of the isolation oil, it is easy to penetrate into the interior of the mixture, further ensuring the uniformity of curing and realizing overall rapid curing.

[0046] (5) The active asphalt provided by the present invention can ensure the phase stability of epoxy and asphalt during the transportation stage. The active groups such as carboxyl contained in the active asphalt can improve the polarity of asphalt and react with epoxy resin to form a chemical bond between epoxy and asphalt, thereby enhancing the compatibility and stability of asphalt and epoxy resin and avoiding phase separation of epoxy asphalt during the transportation stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments in the records of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0048] Figure 1 The figure shows a schematic diagram of a synergistic system of a reactive gas-silicon network and an epoxy curing network composed of reactive amino-based gas-silicon and reactive epoxy-based gas-silicon;

[0049] Figure 2 Shown are the viscosity-time-temperature curves of Example 2, Comparative Example 1 and Comparative Example 5;

[0050] Figure 3 Shown is a flow chart for the use of viscosity-time-temperature controllable adjustable epoxy asphalt.

[0051] Figure numerals: 1. Epoxy cured network; 2. Reactive gas-silicon network. DETAILED DESCRIPTION

[0052] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, a viscosity-time-temperature controllable adjustable epoxy asphalt provided by the present invention, its specific implementation method, characteristics and effects are described in detail as follows.

[0053] Sources of raw materials used in the examples:

[0054] Highly active epoxy resin: 1,4-butanediol glycidyl ether, Shanghai Aladdin Biochemical Technology Co., Ltd.

[0055] Low-activity epoxy resin: polyethylene glycol diglycidyl ether, Sinopharm Chemical Reagent Co., Ltd.

[0056] Fumed silica, Shanghai Aladdin Biochemical Technology Co., Ltd.

[0057] Amine modifier: N-cyclohexylhydroxylamine, Shanghai Aladdin Biochemical Technology Co., Ltd.

[0058] Epoxy modifier: 4-hydroxybutyl acrylate glycidyl ether, Shanghai Aladdin Biochemical Technology Co., Ltd.

[0059] Curing agent: Imidazole, Shanghai MacLean Biochemical Technology Co., Ltd.

[0060] Medium temperature accelerator: 2,4,6-tris(dimethylaminomethyl)phenol, Sinopharm Chemical Reagent Co., Ltd.

[0061] Isolation oil: Epoxidized soybean oil, Shanghai Aladdin Biochemical Technology Co., Ltd.

[0062] Room temperature accelerator: polythiol, Shanghai McLean Biochemical Technology Co., Ltd.

[0063] <Test method for viscosity-time-temperature controllable epoxy asphalt mixture>:

[0064] The viscosity-time-temperature controllable epoxy asphalt mixture is prepared by mixing the viscosity-time-temperature controllable mixed initial material indoors and then heat-insulating it in an oven to simulate the transportation process, and then adding reactive isolation oil after the heat-insulation to obtain the viscosity-time-temperature controllable mixed final material, and finally repeatedly rolling and molding at different temperatures and then curing at room temperature;

[0065] <Test method for adhesive-time-temperature controllable epoxy asphalt binder>:

[0066] After the viscosity-time-temperature controllable epoxy asphalt is mixed, the epoxy asphalt sample is placed in the rotational rheometer. The temperature program of the rotational rheometer is: keep at 180℃ for 2-3h, cool down to 150℃ at 3℃ / min, then cool down to 120℃ at 2℃ / min, and finally cool down to 80℃ at 2℃ / min.

[0067] Embodiment 1:

[0068] The epoxy asphalt material provided in this embodiment is calculated by weight: the reaction-adjustable epoxy resin includes 10 parts of 1,4-butanediol glycidyl ether, 50 parts of polyethylene glycol diglycidyl ether, and 4 parts of reactive amino silicones; the reaction-adjustable curing agent includes 30 parts of imidazole, 4 parts of reactive epoxy silicones, and 2 parts of 2,4,6-tris(dimethylaminomethyl)phenol; the reactive isolation oil includes 30 parts of epoxy soybean oil and 10 parts of core-shell accelerator.

[0069] The preparation and use process of a viscosity-time-temperature controllable epoxy asphalt is as follows:

[0070] S1. Preheat 50 parts of adjustable reaction epoxy resin and 50 parts of adjustable reaction curing agent at 60°C, add them into a mixing tank, and pre-cure them at 100-120°C for 10 minutes to form an epoxy premix;

[0071] S2, mixing 3 parts of active asphalt and 94 parts of stone at 165-180° C. to form an active asphalt mixture;

[0072] S3, adding 3 parts of epoxy premix to the active asphalt mixture, and mixing at 165-180° C. for 2 minutes to obtain a viscosity-time-temperature controllable epoxy asphalt mixture;

[0073] S4. Add reactive isolation oil during paving. Add 1% of the mixture mass of reactive isolation oil during paving;

[0074] S5, forming by initial pressing, secondary pressing and final pressing at different temperatures in the rolling stage;

[0075] S6, test after normal temperature maintenance;

[0076] Performance Test:

[0077] Table 1. Test results of epoxy asphalt materials in Example 1

[0078]

[0079] Embodiment 2:

[0080] The epoxy asphalt material provided in this embodiment is calculated by weight: the reaction-adjustable epoxy resin includes 15 parts of 1,4-butanediol glycidyl ether, 40 parts of polyethylene glycol diglycidyl ether, and 6 parts of reactive amino silicones; the reaction-adjustable curing agent includes 30 parts of imidazole, 6 parts of reactive epoxy silicones, and 2 parts of 2,4,6-tris(dimethylaminomethyl)phenol; the reactive isolation oil includes 30 parts of epoxy soybean oil and 10 parts of core-shell accelerator.

[0081] The preparation and use process of the epoxy asphalt material provided in this embodiment is the same as that in Example 1.

[0082] Performance Test:

[0083] Table 2. Test results of epoxy asphalt materials in Example 2

[0084]

[0085] Embodiment 3:

[0086] The epoxy asphalt material provided in this embodiment is calculated by weight: the reaction-adjustable epoxy resin includes 20 parts of 1,4-butanediol glycidyl ether, 30 parts of polyethylene glycol diglycidyl ether, and 8 parts of reactive amino silicones; the reaction-adjustable curing agent includes 30 parts of imidazole, 8 parts of reactive epoxy silicones, and 2 parts of 2,4,6-tris(dimethylaminomethyl)phenol; the reactive isolation oil includes 30 parts of epoxy soybean oil and 10 parts of core-shell accelerator.

[0087] The preparation and use process of the epoxy asphalt material provided in this embodiment is the same as that in Example 1.

[0088] Performance Test:

[0089] Table 3. Test results of epoxy asphalt materials in Example 3

[0090]

[0091]

[0092] Comparative Example 1:

[0093] The epoxy asphalt material provided in this comparative example has the same preparation steps as Example 2 except that the reactive gas silicon is used in place of the ordinary gas silicon.

[0094] The steps for using the epoxy asphalt material in this comparative example are the same as those in Example 2.

[0095] Performance Test:

[0096] Table 4. Test results of epoxy asphalt materials in Comparative Example 1

[0097]

[0098] Compared with Example 2, the reactive gas silica was replaced with ordinary gas silica in Comparative Example 1. The results showed that from mixing to paving, at the same time and temperature, the viscosity of the epoxy asphalt and the Marshall void ratio of the mixture of Comparative Example 1 were lower than those of Example 2. This is because ordinary gas silica only plays the role of regulating the inorganic thixotropic system in the system and cannot form an inorganic-organic cross-linked network, thereby reducing the compressive resistance of the epoxy asphalt, resulting in a Marshall void ratio of less than 4%, and the final strength of 55-60 kN was reached after 2 days of curing.

[0099] Comparative Example 2:

[0100] In the preparation process of the epoxy asphalt material provided in this comparative example, except that the reaction adjustable epoxy resin and the reaction adjustable curing agent are not pre-cured, the remaining preparation steps are the same as those in Example 2.

[0101] The steps for using a viscosity-time-temperature controllable epoxy asphalt are as follows:

[0102] S1. Preheat the reaction-adjustable epoxy resin and the reaction-adjustable curing agent at 60° C. respectively and evenly;

[0103] S3, adding the preheated evenly adjustable reaction epoxy resin and adjustable reaction curing agent to the active asphalt mixture respectively, and mixing at 180° C. for 2 minutes to obtain a viscosity-time-temperature controllable adjustable epoxy asphalt mixture, wherein the mass ratio of the adjustable reaction epoxy resin, the adjustable reaction curing agent and the active asphalt is 0.5:0.5:1;

[0104] The remaining steps for using the epoxy asphalt material in this comparative example are the same as those in Example 2.

[0105] Performance Test:

[0106] Table 5. Test results of epoxy asphalt materials in Comparative Example 2

[0107]

[0108] Compared with Example 2, the reaction-adjustable epoxy resin and the reaction-adjustable curing agent in Comparative Example 2 were not pre-cured. The results showed that at the same time and temperature, the viscosity of the epoxy asphalt in Comparative Example 2 was lower than that in Example 2, and the Marshall void ratio of the mixture in Comparative Example 1 was lower than that in Example 2, and the curing time was greater than 1 day. This is because the epoxy was not pre-cured, and a preliminary epoxy curing network could not be formed. In addition, the dilution effect of asphalt reduced the curing rate, slowed the overall viscosity growth rate, and prolonged the time to reach the final strength.

[0109] Comparative Example 3:

[0110] The epoxy asphalt material provided in this comparative example has the same preparation and use steps as Example 2 except that only high-activity epoxy resin is added.

[0111] The steps for using the epoxy asphalt material in this comparative example are the same as those in Example 2.

[0112] Performance Test:

[0113] Table 6. Test results of epoxy asphalt materials in Comparative Example 3

[0114]

[0115] Compared with Example 2, only high-activity epoxy resin was added in Comparative Example 3. The results showed that the viscosity of the epoxy asphalt and the Marshall void ratio of the mixture in Comparative Example 3 were much higher than those in Example 2. This was because the high-activity epoxy resin could not play a role in regulating the reaction rate at each stage, and the viscosity of the system increased rapidly, resulting in difficulty in compaction during the rolling stage and a high Marshall void ratio.

[0116] Comparative Example 4:

[0117] The epoxy asphalt material provided in this comparative example has the same preparation and use steps as Example 2, except that the active asphalt is replaced by ordinary base asphalt.

[0118] The steps for using the epoxy asphalt material in this comparative example are the same as those in Example 2.

[0119] Performance Test:

[0120] Table 7. Test results of epoxy asphalt materials in Comparative Example 4

[0121]

[0122] Compared with Example 2, the active asphalt was replaced with ordinary base asphalt in Comparative Example 4. The results showed that the viscosity of the epoxy asphalt and the Marshall void ratio of the mixture in Comparative Example 4 were slightly lower than those in Example 2. This was due to the poor compatibility of the base asphalt with the epoxy resin, which resulted in a low cross-linking density of the epoxy asphalt cured network.

[0123] Comparative Example 5:

[0124] The epoxy asphalt material provided in this comparative example has the same preparation and use steps as in Example 2, except that the core-shell type accelerator is added to the reaction adjustable curing agent for premixing.

[0125] The steps for using the epoxy asphalt material in this comparative example are the same as those in Example 2.

[0126] Performance Test:

[0127] Table 8. Test results of epoxy asphalt materials in Comparative Example 5

[0128]

[0129]

[0130] Compared with Example 2, in Comparative Example 5, the core-shell type accelerator was added in the premixing stage. The results showed that the epoxy asphalt viscosity and the Marshall void ratio of the mixture of Comparative Example 5 were higher than those of Example 2. This was because part of the core-shell type accelerator structure was destroyed during the mixing and transportation process, resulting in the release of the core-shell type room temperature accelerator, thereby accelerating the reaction rate of the system.

[0131] Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A viscosity-time-temperature controllable epoxy asphalt, characterized in that: The controllable and adjustable epoxy asphalt is composed of a reaction-adjustable epoxy resin, a reaction-adjustable curing agent, a reaction-type isolation oil, and an active asphalt; The adjustable reaction epoxy resin comprises the following components in parts by mass: 10~20 parts of highly active epoxy resin; 30~50 parts of low-activity epoxy resin; 4~8 parts of reactive amino silicon; The adjustable reaction curing agent comprises the following components in parts by mass: 20~30 parts of curing agent; 4~8 parts of reactive epoxy-based gas silicon; 1~5 parts of medium temperature accelerator; The reactive isolation oil comprises the following components by weight: 30~40 parts of isolation oil; 5~10 parts of core-shell accelerator; The ratio of the reaction-adjustable epoxy resin, the reaction-adjustable curing agent, the active asphalt and the reaction-type isolation oil is 0.5:0.5:1:0.3-0.4; The controllable and adjustable epoxy asphalt has a viscosity of 0.5-1 Pa·s in the mixing stage, and the core-shell type accelerator is released in the rolling stage to achieve a viscosity of 1-200 Pa·s.

2. The viscosity-time-temperature controllable epoxy asphalt according to claim 1, characterized in that: The reactive amino-based gas silicon is prepared by grafting amino-based compounds on the side chains of gas-phase silica; the reactive epoxy-based gas silicon is prepared by grafting epoxy-based compounds on the side chains of gas-phase silica.

3. The viscosity-time-temperature controllable epoxy asphalt according to claim 1, characterized in that: The core-shell accelerator consists of a silica shell and a room-temperature accelerator core; the room-temperature accelerator is one or more of polyamide, polythiol, and aliphatic polyamine; and the activation energy of the reaction between the room-temperature accelerator and the epoxy system is 15-20 kJ / mol.

4. The viscosity-time-temperature controllable epoxy asphalt according to claim 1, characterized in that: The medium-temperature accelerator is one or more of tertiary amine, resorcinol, and aminophenol; the activation energy of the reaction between the medium-temperature accelerator and the epoxy system is 30-40 kJ / mol.

5. The viscosity-time-temperature controllable epoxy asphalt according to claim 1, characterized in that: The high-activity epoxy resin is one or more of neopentyl glycol diglycidyl ether, 1,4-butanediol glycidyl ether, and 1,6-hexanediol diglycidyl ether; the molecular weight of the high-activity epoxy resin is 200-1000; the low-activity epoxy resin is one or more of aliphatic glycidyl ether epoxy resin, polyphenol glycidyl ether epoxy resin, and aliphatic epoxidized olefin compound; the molecular weight of the low-activity epoxy resin is 5000-10000.

6. The viscosity-time-temperature controllable epoxy asphalt according to claim 1, characterized in that: The curing agent is one or more of imidazole, alicyclic amine, and tertiary amine salt; the reaction activation energy of the curing agent and epoxy system at 165-180° C. is 50-60 kJ / mol.

7. The viscosity-time-temperature controllable epoxy asphalt according to claim 1, characterized in that: The isolation oil is one or more of epoxy linseed oil, epoxy castor oil and epoxy soybean oil; and the viscosity of the isolation oil is 0.2-0.5 Pa·s.

8. The viscosity-time-temperature controllable epoxy asphalt according to claim 1, characterized in that: The active asphalt is obtained by modifying base asphalt with a reactive expander; the reactive expander is one or more of a long-chain aliphatic dibasic acid, a long-chain alkylphenol, and a long-chain alkyl imidazoline.

9. The method for using the viscosity-time-temperature controllable epoxy asphalt according to claim 1, characterized in that: The steps include: S1, premixing a reaction-adjustable epoxy resin and a reaction-adjustable curing agent at 100-120° C. to form an epoxy premix; S2, mixing the active asphalt and stone at 165-180°C to form an active asphalt mixture; S3, adding the epoxy premix to the active asphalt mixture and mixing to obtain a viscosity-time-temperature controllable epoxy asphalt mixture; S4. Add reactive isolation oil during paving; S5, rolling; S6. Maintain health at normal temperature and open traffic.

10. The method for using the viscosity-time-temperature controllable epoxy asphalt according to claim 9, characterized in that: The amount of the reactive isolation oil used is 0.5% to 1% by weight of the viscosity-time-temperature controllable adjustable epoxy asphalt mixture.

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