A system and process for preparing solid epoxy modified asphalt for roads and bridges

Abstract

The present invention relates to the technical field of asphalt mixture production, and in particular to a system and process for preparing solid epoxy modified asphalt for roads and bridges. The system comprises: a silo, a resin heating device, a static mixing container, an asphalt storage tank, a mixture mixing cylinder, a first feeding mechanism and a metering feeding mechanism. The present invention uses the above-mentioned device to mix a solid epoxy A component and a solid epoxy B component, and then melt and heat them into an epoxy melt, and mix a part of the epoxy melt with an aggregate so that a layer of solid epoxy melt is firmly coated on the surface of the aggregate, and the other part is mixed with active asphalt to form a solid epoxy modified asphalt with good stability. The ‑COOH group in the active asphalt reacts chemically with the epoxy group in the solid epoxy melt coated on the surface of the aggregate to form a strong chemical bond connection, and finally forms a strong structure of aggregate, solid epoxy melt and solid epoxy modified asphalt from the inside to the outside, which helps to improve the quality of the solid epoxy modified asphalt mixture.

Description

Technical Field

[0001] The invention relates to the technical field of asphalt mixture production, and in particular to a system and process for preparing solid epoxy modified asphalt for roads and bridges. Background Art

[0002] Epoxy resin is a thermosetting polymer material. Epoxy asphalt materials modified with epoxy resin have excellent adhesion, strength, rutting resistance, fatigue cracking resistance and other properties and are widely used in large-span steel bridge deck paving. In fact, the excellent performance of epoxy asphalt can meet the use requirements of highways, concrete bridge deck paving, tunnel paving, etc. under the characteristics of heavy load, high temperature, and channelized traffic. However, the transportation, storage and delivery process of the most commonly used two-component liquid epoxy modifier is complicated, which is not conducive to its promotion in the field of ordinary road and bridge construction. Solid epoxy modifiers can largely solve the above problems.

[0003] Although solid epoxy modifiers have good application prospects, the current research on solid epoxy asphalt preparation equipment and processes is mostly concentrated in the field of coating and film production, and less research is done in the field of road and bridge construction. If the two-component liquid epoxy asphalt preparation method based on manual loading is directly applied, the following problems will arise: (1) Manual weighing and pouring not only require a lot of manpower and time, but also the accuracy of the proportions between the components and the construction quality cannot be guaranteed; (2) Since solid epoxy resin is mainly in powder form during use, manual production and open equipment will inevitably cause powder to escape, which will affect the health of workers and reduce the utilization rate of raw materials; (3) At present, the mixing form of solid epoxy asphalt mixture is mostly direct-cast, and the uniformity of solid epoxy component A and solid epoxy component B in the mixture is difficult to ensure, and the performance of the mixture is also difficult to guarantee.

[0004] The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the present disclosure, 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 technical problem to be solved by the present invention is to provide a solid epoxy modified asphalt preparation system and process for roads and bridges, which can efficiently and quickly obtain high-quality solid epoxy modified asphalt mixture through fully automatic metering, feeding, melting, mixing and conveying.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is: a solid epoxy modified asphalt preparation system for roads and bridges, comprising:

[0007] The resin heating device comprises a heating chamber, a first feed port and a first discharge port, wherein the first feed port is connected to two silos through a feeding pipeline, and both silos are fed into the heating chamber through a first feeding mechanism;

[0008] A melt conveying pipe, wherein the pipe inlet is connected to the first discharge port, and the pipe outlet is provided with a tee, and the other two ends of the tee are respectively connected to a static mixing container and a mixed material mixing cylinder through pipes, and the static mixing container discharge port is connected to the mixed material mixing cylinder through a pipe;

[0009] an asphalt storage tank, the discharge port of which is in communication with the static mixing container;

[0010] Wherein, metering feeding mechanisms are arranged between the tee and the static mixing container, between the tee and the mixture mixing cylinder, between the asphalt storage tank and the static mixing container, and between the static mixing container and the mixture mixing cylinder.

[0011] Furthermore, the first feeding mechanism is an air blowing system, which is installed at the end of the material delivery pipeline away from the resin heating device, and the two silos are installed on the material delivery pipeline at intervals. The air blowing system is used to continuously blow air into the material delivery pipeline to blow the material dropped from the silo into the heating chamber.

[0012] It should be noted that both the solid epoxy component A and the solid epoxy component B are powdered materials and are located in one of the silos respectively. The two are physically premixed in the conveying pipeline through the airflow of the blowing system, and then enter the resin heating device for heating. Compared with directly pouring the materials into the resin heating device manually, the above-mentioned feeding method can make the mixing of the solid epoxy component A and the solid epoxy component B more uniform.

[0013] Furthermore, a first silo door that can be opened and closed is provided in the middle of the silo, and a second silo door that can be opened and closed is provided at the bottom discharge port, and a gravity sensor is provided on the first silo door.

[0014] Furthermore, it also includes two conveyor belts, and each conveyor belt outlet is set corresponding to one of the silos. The two conveyor belts respectively transport the solid epoxy A component and the solid epoxy B component to one of the silos. The mass ratio of the solid epoxy A component and the solid epoxy B component is 5:5-8:2. The two are transported to the silo through the conveyor belts. When the weight of the material reaches the set value of the gravity sensor, the first silo door opens, and the material above the first silo door falls between the first silo door and the second silo door. Before the blowing system works, the second silo door needs to be opened to allow the material to fall into the feeding channel below. When the blowing system works, the second silo door is closed to ensure that the device is in a sealed state during the entire loading process to ensure that the powdered material does not escape.

[0015] Furthermore, a heat preservation buffer tank is arranged between the resin heating device and the melt conveying pipe. The heat preservation buffer tank is arranged so that the solid epoxy melt heated to a specified temperature can remain in a molten state in the heat preservation buffer tank, and also plays a role of fluid buffering.

[0016] Furthermore, the resin heating device adopts a spiral heating box, and a spiral conveying rod and an inner coil are arranged in the spiral heating box.

[0017] Furthermore, the metering feeding mechanism adopts an electronic metering pump, which is used to regulate the flow rate of the fluid in the pipe. The densities of the solid epoxy melt, active asphalt and solid epoxy modified asphalt are known. The solid epoxy content range is usually between 20% and 50%. According to specific needs, the mass ratio of solid epoxy melt and active asphalt is strictly controlled to be 0.2-0.4:0.4-0.8. The controllable flow rate of the electronic metering pump is 1-50L / s.

[0018] Furthermore, it also includes a controller, which is signal-connected to at least the first feeding mechanism, the first bin door, the second bin door, the gravity sensor, the resin heating device and the metering feeding mechanism to achieve refined control of the asphalt preparation process and ensure the coordination of the entire asphalt preparation process.

[0019] The second object of the present invention is to provide a process for preparing solid epoxy modified asphalt for roads and bridges, by heating solid epoxy A component and solid epoxy B component into a molten state, partially diverting and adding special active asphalt to form a firm solid epoxy modified asphalt mixture structure.

[0020] The above technical objectives of the present invention are achieved through the following technical solutions:

[0021] A process for preparing solid epoxy modified asphalt for roads and bridges, comprising the following steps:

[0022] Step 1: Solid epoxy component A and solid epoxy component B are physically premixed under the action of the blowing system and then enter the resin heating device;

[0023] Step 2: solid epoxy component A and solid epoxy component B are mixed and heated in the resin heating device into a melt state to form a solid epoxy melt;

[0024] Step 3: The solid epoxy melt flows into the mixture mixing tank according to the designed proportion to mix with the aggregate to form the aggregate primary mixture, and the remaining part enters the static mixing container to mix with the active asphalt to form the solid epoxy modified asphalt;

[0025] Step 4: The solid epoxy modified asphalt is transported to the mixture mixing tank through a pipeline and mixed with the aggregate primary mixture to form a solid epoxy modified asphalt mixture.

[0026] Furthermore, the solid epoxy melt is coated on the aggregate surface by atomizing spraying, and the solid epoxy modified asphalt is also coated on the aggregate primary mixture surface by atomizing spraying.

[0027] Furthermore, the solid epoxy A component is E12, and the solid epoxy B component is any one of SJ3A, SJ6200, SJ7202-4, and P5881.

[0028] Furthermore, the active asphalt is formed by grafting base asphalt with maleic anhydride. The active asphalt has -COOH groups, which can react with epoxy groups in the solid epoxy melt to form a strong chemical bond connection.

[0029] The beneficial effects of the present invention are as follows: the solid epoxy modified asphalt preparation system for roads and bridges provided by the present invention can achieve the purpose of precise batching without the need for manual weighing of components, pouring and stirring, by mixing solid epoxy component A and solid epoxy component B, melting and heating them into an epoxy melt, and mixing a portion of the epoxy melt with aggregates, making full use of the beneficial bonding of the epoxy melt to the aggregates, so that the surface of the aggregate is firmly coated with a layer of solid epoxy melt, and the other portion forms a solid epoxy modified asphalt with good stability with active asphalt in a static mixing container, the -COOH group in the active asphalt chemically reacts with the epoxy group in the solid epoxy melt coated on the surface of the aggregate to form a strong chemical bond connection, and finally a strong structure of aggregate, solid epoxy melt and solid epoxy modified asphalt is formed from the inside to the outside, which helps to improve the quality of the solid epoxy modified asphalt mixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] 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 description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 This is a schematic diagram of the structure of a system for preparing solid epoxy modified asphalt for roads and bridges in Example 1 of the present invention;

[0032] Figure 2 This is a flow chart of a process for preparing solid epoxy modified asphalt for roads and bridges in Example 1 of the present invention;

[0033] Figure 3This is a schematic diagram of the connection structure of aggregate, solid epoxy melt and solid epoxy modified asphalt in Example 1 of the present invention;

[0034] Figure 4 This is a schematic diagram of the connection structure between aggregate and activated asphalt in Comparative Example 1 of the present invention;

[0035] Figure 5 This is a schematic diagram of the connection structure of aggregate, solid epoxy melt and solid epoxy asphalt in Comparative Example 2 of the present invention;

[0036] Figure 6 This is a schematic diagram of the connection structure of aggregate, solid epoxy melt and activated asphalt in Comparative Example 3 of the present invention;

[0037] Figure 7 This is a schematic diagram of the connection between aggregate and solid epoxy modified asphalt in Comparative Example 4 of the present invention.

[0038] Figure numerals: 1. spiral heating box; 2. feed pipeline; 3. silo; 4. blowing system; 5. melt conveying pipe; 6. tee; 7. static mixing container; 8. mixture mixing cylinder; 9. asphalt storage tank; 10. first silo door; 11. second silo door; 12. gravity sensor; 13. conveyor belt; 14. insulation buffer tank; 15. spiral conveying rod; 16. inner coil; 17. electronic metering pump; 18. controller; 19. atomizing nozzle; 20. solid epoxy modified asphalt; 21. aggregate; 22. chemical bond connection; 23. physical connection; 24. solid epoxy melt; 25. active asphalt; 26. solid epoxy asphalt. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0041] Sources of raw materials used in the examples:

[0042] Solid epoxy resin component A: E12 (softening point 90-93°C, EEW=741-847), Anhui Hengyuan New Materials Co., Ltd.

[0043] Solid epoxy resin component B: polyester resin SJ3A (acid value 70-80 mgKOH / g), polyester resin SJ6200 (acid value 45-55 mgKOH / g), polyester resin SJ7202-4 (acid value 30-36 mgKOH / g), polyester resin P5881 (acid value 18-23 mgKOH / g), Anhui Shenjian New Materials Co., Ltd.

[0044] In order to facilitate those skilled in the art to understand the preparation system of the present invention, the present invention is further described below in conjunction with the accompanying drawings.

[0045] like Figure 1 As shown, the solid epoxy modified asphalt preparation system for roads and bridges provided by the present invention includes two conveyor belts 13, two silos 3, a feed pipeline 2, a first feeding mechanism, a resin heating device, an insulation buffer tank 14, a melt conveying pipe 5, a tee 6, a static mixing container 7, an asphalt storage tank 9, a mixture mixing cylinder 8, a metering feeding mechanism and a controller 18.

[0046] Among them, the solid epoxy resin component A and the solid epoxy resin component B are respectively fed into one of the silos 3 using one of the conveyor belts 13. The material first falls onto the first silo door 10, which is in a closed state. The gravity sensor 12 is used to weigh the material above the first silo door 10. When the set value is reached, the first silo door 10 is opened, and the material falls onto the second silo door 11. After all the material falls in, the first silo door 10 is closed, and the second silo door 11 and the first feeding mechanism are opened. In this embodiment, the first feeding mechanism adopts a blowing system 4, and the powdered material falling into the feed pipe 2 through the second silo door 11 enters the resin heating device under the continuous blowing of the blowing system 4. The resin heating device of this embodiment adopts a spiral heating box 1, and a spiral conveying rod 15 and an inner coil 16 are provided in the spiral heating box 1 for heating the resin. The material is heated into a solid epoxy melt 24 in the spiral heating box 1, and the solid epoxy melt 24 flows downward into the insulation In the buffer tank 14, the metering feeding mechanism adopted in this embodiment adopts an electronic metering pump 17. The electronic metering pump 17 first draws the solid epoxy melt 24 in the insulation buffer tank 14 into the melt conveying pipe 5, and then conveys part of it to the static mixing container 7, and part of it is directly conveyed to the mixture mixing cylinder 8. The asphalt storage tank 9 is connected with the static mixing container 7 through a pipeline and conveys active asphalt 25 to the static mixing container 7. The active asphalt 25 is mixed with the solid epoxy melt 24 to generate solid epoxy modified asphalt 20, and the solid epoxy melt 24 directly conveyed to the mixture mixing cylinder 8 is first preliminarily mixed with the aggregate to generate an aggregate primary mixture. After being mixed evenly, the solid epoxy modified asphalt 20 is also sprayed onto the aggregate primary mixture through the atomizing nozzle 19. After mixing, a solid epoxy modified asphalt mixture is generated. The operation of all the above devices is remotely controlled by the controller 18, and the controller 18 can be wirelessly connected to each other for signal connection.

[0047] In order to demonstrate the technical effects of the present invention and help those skilled in the art to master the process of the present invention, the present invention will be specifically described below in conjunction with embodiments.

[0048] Example 1

[0049] The components used in this embodiment are solid epoxy A component E12, solid epoxy B component polyester resin SJ3A, the ratio of the two is 5:5, the asphalt used is active asphalt, the mass ratio of solid epoxy to active asphalt is 0.3:0.45, and the solid epoxy content is 40%; 50% of the solid epoxy melt is first mixed with the aggregate, and the other 50% is mixed with the active asphalt to form a solid epoxy modified asphalt. The specific preparation process includes the following steps:

[0050] Step 1: The solid epoxy component A and the solid epoxy component B in the silo 3 are physically premixed under the action of the blowing system 4 and then enter the resin heating device;

[0051] Step 2: The solid epoxy A component and the solid epoxy B component are mixed and heated in a resin heating device into a melt state to form a solid epoxy melt 24;

[0052] Step 3: The solid epoxy melt 24 flows into the mixture mixing tank 8 according to the designed proportion to mix with the aggregate 21 to form the aggregate primary mixture, and the remaining part enters the static mixing container 7 to mix with the active asphalt 25 to form the solid epoxy modified asphalt 20;

[0053] Step 4: The solid epoxy modified asphalt 20 is transported to the mixture mixing tank 8 through a pipeline and mixed with the aggregate primary mixture to form a solid epoxy modified asphalt mixture.

[0054] Testing and Conclusion

[0055] The Marshall properties, water stability, low temperature properties and asphalt-aggregate adhesion properties of the solid epoxy modified asphalt mixture specimens in this embodiment were tested and recorded. The test results are shown in Table 1.

[0056] Table 1 Performance test results of solid epoxy modified asphalt mixture in Example 1

[0057]

[0058] Comparative Example 1

[0059] The active asphalt mixture preparation process provided in this comparative example comprises the following steps:

[0060] Step 1: Active asphalt is directly mixed with aggregate to form an active asphalt mixture.

[0061] The Marshall properties, water stability, low temperature properties and asphalt-aggregate adhesion properties of the active asphalt mixture specimens in this comparative example were tested and recorded. The test results are shown in Table 2.

[0062] Table 2 Comparative Example 1 Active Asphalt Mixture Performance Test Results

[0063]

[0064] Comparative Example 2

[0065] The components used in this comparative example are solid epoxy A component E12, solid epoxy B component SJ3A polyester resin, the ratio of the two is 5:5, the asphalt used is matrix asphalt, the mass ratio of solid epoxy to matrix asphalt is 0.3:0.45, the solid epoxy content is 40%, 50% of the solid epoxy melt is first mixed with the aggregate, and the other 50% is mixed with the matrix asphalt to form solid epoxy asphalt. Specifically, the following steps are included:

[0066] Step 1: The solid epoxy component A and the solid epoxy component B in the silo 3 are physically premixed under the action of the blowing system 4 and then enter the resin heating device;

[0067] Step 2: The solid epoxy A component and the solid epoxy B component are mixed and heated in a resin heating device into a melt state to form a solid epoxy melt 24;

[0068] Step 3: The solid epoxy melt 24 flows into the mixture mixing cylinder 8 according to the designed proportion to mix with the aggregate 21 to form the aggregate primary mixture, and the remaining part enters the static mixing container 7 to mix with the base asphalt to form solid epoxy asphalt;

[0069] Step 4: The solid epoxy asphalt is transported to the mixture mixing tank 8 through a pipeline and mixed with the aggregate primary mixture to form a solid epoxy asphalt mixture.

[0070] The Marshall properties, water stability, low temperature properties and asphalt-aggregate adhesion properties of the solid epoxy asphalt mixture specimens in this comparative example were tested and recorded. The test results are shown in Table 3.

[0071] Table 3 Comparative Example 2 Solid Epoxy Asphalt Mixture Performance Test Results

[0072]

[0073] Comparative Example 3

[0074] The components used in this comparative example are solid epoxy A component E12, solid epoxy B component SJ3A polyester resin, the ratio of the two is 5:5, the asphalt used is active asphalt, the mass ratio of solid epoxy to active asphalt is 0.3:0.45, the solid epoxy content is 40%, and 100% of the solid epoxy melt is first mixed with the aggregate. Specifically, the following steps are included:

[0075] Step 1: The solid epoxy component A and the solid epoxy component B in the silo 3 are physically premixed under the action of the blowing system 4 and then enter the resin heating device;

[0076] Step 2: The solid epoxy A component and the solid epoxy B component are mixed and heated in a resin heating device into a melt state to form a solid epoxy melt 24;

[0077] Step 3: The solid epoxy melt 24 flows into the mixture mixing tank 8 according to the designed ratio of 100% and is mixed with the aggregate 21 to form an aggregate primary mixture;

[0078] Step 4: The active asphalt 25 enters the mixture mixing cylinder 8 and is mixed with the aggregate primary mixture to form a solid epoxy modified asphalt mixture.

[0079] The Marshall properties, water stability, low temperature properties and asphalt-aggregate adhesion properties of the solid epoxy asphalt mixture specimens in this comparative example were tested and recorded. The test results are shown in Table 4.

[0080] Table 4 Comparative Example 3 Solid Epoxy Asphalt Mixture Performance Test Results

[0081]

[0082] Comparative Example 4

[0083] The solid epoxy component A for roads and bridges provided in this comparative example is E12, and the solid epoxy component B is polyester resin SJ3A, and the ratio of the two is 5:5; the asphalt used is active asphalt; the mass ratio of solid epoxy to active asphalt is 0.3:0.45, and the solid epoxy dosage is 40%; 100% of the solid epoxy melt is mixed with the active asphalt to form solid epoxy modified asphalt.

[0084] Step 1: The solid epoxy component A and the solid epoxy component B in the silo 3 are physically premixed under the action of the blowing system 4 and then enter the resin heating device;

[0085] Step 2: The solid epoxy A component and the solid epoxy B component are mixed and heated in a resin heating device into a melt state to form a solid epoxy melt 24;

[0086] Step 3: The solid epoxy melt 24 flows into the static mixing container 7 according to the designed ratio of 100% and is mixed with the active asphalt 25 to form the solid epoxy modified asphalt 20;

[0087] Step 4: The solid epoxy modified asphalt 20 flows into the mixture mixing tank 8 and is mixed with the aggregate 21 to form a solid epoxy modified asphalt mixture.

[0088] The Marshall properties, water stability, low temperature properties and asphalt-aggregate adhesion properties of the solid epoxy asphalt mixture specimens in this comparative example were tested and recorded. The test results are shown in Table 5.

[0089] Table 5 Comparative Example 4 Solid Epoxy Asphalt Mixture Performance Test Results

[0090]

[0091]

[0092] Results and Discussion

[0093] like Figure 3 and Figure 4As shown, compared with Example 1, Comparative Example 1 does not contain solid epoxy, only active asphalt, and the aggregate and the active asphalt only rely on weak physical connection, and the adhesion grade between the asphalt and the aggregate is only level 4; there is only a weak physical connection between the aggregates, resulting in poor performance of the mixture. The test results also show that the Marshall stability, water stability and anti-rutting performance of the mixture are very poor.

[0094] like Figure 3 and 5 As shown, compared with Example 1, the asphalt used in Comparative Example 2 is base asphalt, which is mixed with solid epoxy melt to form solid epoxy asphalt. A layer of solid epoxy melt is coated on the surface of the aggregate, but since the base asphalt does not contain -COOH groups that can react with epoxy groups, the connection between the aggregate and the solid epoxy asphalt is still a physical connection and is not strong. Therefore, the adhesion grade between the asphalt and the aggregate is only level 4. The addition of solid epoxy slightly enhances the connection between the aggregates, but it is still a physical connection. The performance of the mixture is still poorer than that of Example 1. The test results show that the Marshall stability, water stability and low-temperature performance of the mixture are slightly lower than those of Example 1, and the anti-rutting performance is only half of that of Example 1.

[0095] like Figure 3 and Figure 6 As shown, compared with Example 1, all the solid epoxy melts in Comparative Example 3 are mixed with the aggregates, and a thicker layer of solid epoxy melt is coated on the surface of the aggregates, and the epoxy groups therein react with the -COOH groups in the active asphalt to form a strong chemical bond connection, so the adhesion level between the asphalt and the aggregates reaches level 5. However, the aggregates are connected by the active asphalt and the active asphalt itself will not react, and they are still physically connected. The performance of the mixture is worse than that of Example 1. The test results show that the Marshall stability, water stability and low temperature performance of the mixture are slightly lower than those of Example 1, and the anti-rutting performance is only half of that of Example 1.

[0096] like Figure 3 and Figure 7 As shown, compared with Example 1, all the solid epoxy melts in Comparative Example 4 are mixed with active asphalt to form solid epoxy modified asphalt. Aggregates are directly mixed with solid epoxy modified asphalt, and there is a physical connection between aggregates and solid epoxy modified asphalt, and the connection between the two is not strong, so the adhesion level between asphalt and aggregates is only level 4. Aggregates are connected by solid modified asphalt and solid epoxy modified asphalt, and there are epoxy groups and -COOH groups between them. The two react to form a chemical bond connection, and the performance of the mixture is close to that of Example 1. The test results also show that the Marshall stability, water stability, low temperature performance and anti-rutting performance of the mixture are close to those of Example 1.

[0097] 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 process for preparing solid epoxy modified asphalt for roads and bridges, characterized in that: The following steps are involved: Step 1: Solid epoxy component A and solid epoxy component B are physically premixed under the action of the blowing system and then enter the resin heating device; Step 2: solid epoxy component A and solid epoxy component B are mixed and heated in the resin heating device into a melt state to form a solid epoxy melt; Step 3: The solid epoxy melt flows into the mixture mixing tank according to the designed proportion to mix with the aggregate to form the aggregate primary mixture, and the remaining part enters the static mixing container to mix with the active asphalt to form the solid epoxy modified asphalt; Step 4: The solid epoxy modified asphalt is transported to the mixture mixing tank through a pipeline and mixed with the aggregate primary mixture to form a solid epoxy modified asphalt mixture; The solid epoxy modified asphalt preparation system for roads and bridges comprises: The resin heating device comprises a heating chamber, a first feed port and a first discharge port, wherein the first feed port is connected to two silos through a feeding pipeline, and both silos are fed into the heating chamber through a first feeding mechanism; A melt conveying pipe, wherein the pipe inlet is connected to the first discharge port, and the pipe outlet is provided with a tee, and the other two ends of the tee are respectively connected to a static mixing container and a mixed material mixing cylinder through pipes, and the static mixing container discharge port is connected to the mixed material mixing cylinder through a pipe; an asphalt storage tank, the discharge port of which is in communication with the static mixing container; Wherein, metering feeding mechanisms are arranged between the tee and the static mixing container, between the tee and the mixture mixing cylinder, between the asphalt storage tank and the static mixing container, and between the static mixing container and the mixture mixing cylinder.

2. The process for preparing solid epoxy modified asphalt for roads and bridges according to claim 1, characterized in that: In the preparation system, the first feeding mechanism is an air blowing system, which is installed at the end of the material delivery pipeline away from the resin heating device, and the two silos are installed on the material delivery pipeline at intervals. The air blowing system is used to continuously blow air into the material delivery pipeline to blow the material dropped from the silo into the heating chamber.

3. The process for preparing solid epoxy modified asphalt for roads and bridges according to claim 2, characterized in that: A first silo door that can be opened and closed is arranged in the middle of the silo, and a second silo door that can be opened and closed is arranged at the bottom discharge port, and a gravity sensor is arranged on the first silo door.

4. The process for preparing solid epoxy modified asphalt for roads and bridges according to claim 3, characterized in that: The preparation system also includes two conveyor belts, each of which has an outlet corresponding to one of the silos, and the two conveyor belts transport the solid epoxy A component and the solid epoxy B component to one of the silos respectively.

5. The process for preparing solid epoxy modified asphalt for roads and bridges according to claim 3 or 4, characterized in that: A heat preservation buffer tank is also arranged between the resin heating device and the melt conveying pipe.

6. The process for preparing solid epoxy modified asphalt for roads and bridges according to claim 5, characterized in that: The resin heating device adopts a spiral heating box, and a spiral conveying rod and an inner coil are arranged in the spiral heating box.

7. The process for preparing solid epoxy modified asphalt for roads and bridges according to claim 6, characterized in that: The metering feeding mechanism adopts an electronic metering pump.

8. The process for preparing solid epoxy modified asphalt for roads and bridges according to claim 7, characterized in that: The preparation system further includes a controller, which is signal-connected to at least the first feeding mechanism, the first bin door, the second bin door, the gravity sensor, the resin heating device and the metering feeding mechanism.

9. The process for preparing solid epoxy modified asphalt for roads and bridges according to claim 1, characterized in that: The solid epoxy melt is coated on the aggregate surface by atomizing spraying, and the solid epoxy modified asphalt is also coated on the aggregate primary mixture surface by atomizing spraying.

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