Furan resin-based reactive asphalt cold-patch liquid, asphalt cold-patch material and preparation method of reactive asphalt cold-patch liquid and asphalt cold-patch material

Abstract

The invention discloses a reactive asphalt cold-patch liquid based on furan resin. The reactive asphalt cold-patch liquid comprises the following raw materials in parts by weight: 100 parts of matrix asphalt, 10-30 parts of a diluent, 2-10 parts of furan resin, 0.5-4 parts of a curing agent A, 0.2-2 parts of a compatilizer and 1-3 parts of a flexibilizer. The invention also discloses an asphalt cold patch material based on the reactive asphalt cold patch liquid and a preparation method thereof, so as to solve the problems of low strength, poor durability and the like of the traditional cold patch material. The asphalt cold patch material has excellent heat resistance, chemical stability and early strength, can be used in a wider temperature range, is not influenced by low-temperature and humid environments, not only improves the consistency and aging resistance of asphalt, but also enhances the rigidity, elasticity and rutting resistance of the asphalt, and has the characteristic of green construction.

Description

Technical Field

[0001] The present invention belongs to the technical field of asphalt materials, and particularly relates to a reactive asphalt cold replenishing liquid based on furan resin, an asphalt cold patch material and a preparation method thereof. Background Art

[0002] Asphalt pavements are widely used in road construction due to their driving comfort and relatively high strength. However, due to the effects of natural factors and traffic loads, asphalt pavements are prone to diseases such as potholes, which affect driving safety and comfort. At present, the repair methods for asphalt pavement potholes are mainly divided into hot patching and cold patching. The hot patching method has high requirements for construction environment and equipment and is not suitable for small-area rapid repair; while the cold patching method has better application prospects due to its simple operation, storable property and rapid traffic restoration characteristics.

[0003] Although the cold patching method has obvious advantages, the existing asphalt cold patch materials have some deficiencies, such as high requirements for storage conditions, strict construction requirements, slow formation of early strength, poor bonding performance with the original pavement, weak water damage resistance, and easy to cause secondary damage. These problems limit the wide application of cold patch materials. In order to overcome the limitations of traditional cold patch materials, researchers have developed reactive cold patch materials. Such cold patch materials use liquid petroleum asphalt doped with high molecular polymers as the binder. After adding the curing agent, the curing agent reacts with the high molecular polymer to form a three-dimensional network solid, providing molding strength and having good use performance. However, the cost of this product is relatively high, which limits its wide application.

[0004] Furan resin is considered for use in the preparation of high-performance reactive asphalt cold patch materials due to its excellent heat resistance and chemical stability. Furan resin can form a three-dimensional network structure in asphalt, enhancing the adhesion and water damage resistance of asphalt, thereby improving the early strength and durability of cold patch materials.

[0005] The current research focus is on developing cost-effective and performance-superior reactive cold patch materials. This includes finding suitable resin prepolymers and their dosages, optimizing the types of diluents, and improving the storage stability of asphalt cold replenishing liquid. In addition, researchers are also exploring how to improve the bonding performance and water damage resistance of cold patch materials through modifiers and additives. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a reactive asphalt cold replenishing liquid based on furan resin, an asphalt cold patch material and a preparation method thereof in view of the above-mentioned deficiencies of the prior art. The asphalt cold patch material of the present invention has excellent heat resistance, chemical stability and early strength, can be used in a wider temperature range, is not affected by low temperature and humid environments, not only improves the consistency and aging resistance of asphalt, but also enhances the stiffness and elasticity of asphalt, as well as rutting resistance, and at the same time has the characteristics of green construction.

[0007] To solve the above technical problems, the technical solution adopted by the present invention is as follows: A reactive asphalt cold replenishing liquid based on furan resin, characterized by comprising the following raw materials in parts by weight: 100 parts of matrix asphalt, 10 - 30 parts of diluent, 2 - 10 parts of furan resin, 0.5 - 4 parts of curing agent A, 0.2 - 2 parts of compatibilizer, and 1 - 3 parts of toughening agent.

[0008] The above reactive asphalt cold replenishing liquid based on furan resin is characterized in that the diluent is made by mixing butyl glycidyl ether, aromatic oil, anti-stripping agent, antioxidant, and stabilizer; the mass content of butyl glycidyl ether in the diluent is 30% - 50%, the mass content of aromatic oil is 40% - 60%, the mass content of anti-stripping agent is 2% - 5%, the mass content of antioxidant is 2% - 5%, and the mass content of stabilizer is 2% - 4%.

[0009] The above reactive asphalt cold replenishing liquid based on furan resin is characterized in that the furan resin is one or more of furfural furan resin, furfuryl urea formaldehyde resin, furfuryl alcohol resin, furfural acetone resin, urea formaldehyde modified furan resin, phenolic modified furan resin, ketone phenolic modified furan resin, urea phenolic modified furan resin, formaldehyde modified furan resin, and high furan resin; the compatibilizer is formaldehyde and / or trioxymethylene; the curing agent A is citric acid monohydrate.

[0010] The above reactive asphalt cold replenishing liquid based on furan resin is characterized in that the toughening agent is a polyethylene glycol solution with furfuryl alcohol groups at both ends obtained by modifying polyethylene glycol with furfuryl alcohol; the matrix asphalt includes one or more of petroleum asphalt, coal tar pitch, rock asphalt, and thermoplastic polymer modified asphalt.

[0011] Furthermore, the present invention provides a method for preparing the above reactive asphalt cold replenishing liquid, characterized by comprising the following steps:

[0012] Step 1: Heat the matrix asphalt to 105°C - 140°C to make it in a flowing state;

[0013] Step 2: Add the diluent to the heated matrix asphalt in Step 1 and stir for 30 min - 50 min under the condition of 105°C - 140°C;

[0014] Step 3: Cool down. When the temperature drops to 50°C - 60°C, add furan resin, toughening agent, and compatibilizer, continue to stir for 1 h - 2 h, then add curing agent A, stir for 3 min - 5 min, and the rotation speed is 400 r / min - 800 r / min to obtain the asphalt cold replenishing liquid.

[0015] Furthermore, the present invention provides a cold asphalt patch material based on the above reactive asphalt cold replenishing liquid, which is characterized by comprising the following raw materials in parts by weight: 90 to 100 parts of aggregate, 1 to 4 parts of mineral powder, and 3 to 10 parts of asphalt cold replenishing liquid.

[0016] The above cold asphalt patch material is characterized in that the aggregate is basalt, the mass content of SiO2 in the aggregate is between 40% and 50%, and the aggregate gradation conforms to LB-10 or LB-15 specified in JTG F40-2004; the passing rate of the 0.075mm sieve hole of the mineral powder is not less than 85.0%, and the plasticity index is less than 4.

[0017] Furthermore, the present invention provides a method for preparing the above cold asphalt patch material, which is characterized by comprising: at room temperature, pouring the aggregate into a mixing pot and stirring evenly, then adding the asphalt cold replenishing liquid, adding the mineral powder after stirring, and continuing to stir to obtain the cold asphalt patch material.

[0018] Furthermore, the present invention provides a construction method for the above cold asphalt patch material, which is characterized by comprising: pre-laying the cold asphalt patch material in the area to be constructed, then evenly spraying the curing agent B on the laid cold asphalt patch material, and then rolling and leveling; the curing agent B is a p-toluenesulfonic acid solution.

[0019] The above construction method is characterized in that the mass of the curing agent B is the same as the mass of the curing agent A in the asphalt cold replenishing liquid, and the mass concentration of the p-toluenesulfonic acid solution is 30% to 60%.

[0020] The present invention has the following advantages compared with the prior art:

[0021] 1. The present invention creatively introduces furan resin into the asphalt system and realizes physical mixing with asphalt, which not only significantly improves the consistency and anti-aging performance of asphalt, but also reduces its sensitivity to temperature and humidity. In addition, this fusion also enhances the stiffness and elasticity of asphalt, as well as its resistance to rutting, thereby extending the service life of the road.

[0022] 2. The present invention preferably uses formaldehyde and / or trioxane as compatibilizers, which significantly improves the compatibility between furan resin and asphalt, and preferably uses a polyethylene glycol solution with furfuryl alcohol structures at both ends as a toughening agent, which not only enhances the viscoelasticity and plasticity of asphalt, but also effectively increases the ductility of asphalt, providing a more reliable material choice for road repair.

[0023] 3. The cold asphalt patch material of the present invention exhibits excellent environmental adaptability, can be used in a wider temperature range, and is not affected by low temperature and humid environments. This characteristic enables the products of the present invention to maintain excellent construction performance under diverse climate conditions, broadening their application scope.

[0024] 4. The furan resin of the present invention preferably originates from bio-based materials, and the main raw materials include agricultural and sideline products such as corncobs and wheat straws. These raw materials are widely sourced and highly renewable. Using these materials not only saves energy but also reduces greenhouse gas emissions, fully meeting the current environmental requirements of green construction and sustainable development.

[0025] 5. The asphalt cold patch material of the present invention has excellent heat resistance, chemical stability, and early strength, and can be used within a wider temperature range, being unaffected by low-temperature and humid environments. It not only improves the consistency and anti-aging performance of asphalt but also enhances the stiffness, elasticity, and rutting resistance of asphalt, while featuring the characteristics of green construction.

[0026] The following further describes the technical solutions of the present invention in detail with reference to the accompanying drawings and embodiments. Description of the Drawings

[0027] Figure 1 Testing results of the initial strength and formed strength of each embodiment of the present invention;

[0028] Figure 2 Testing results of the high-temperature resistance of each embodiment of the present invention;

[0029] Figure 3 Testing results of the flexural tensile strength at failure of each embodiment of the present invention;

[0030] Figure 4 Testing results of the average flexural tensile strength of each embodiment of the present invention;

[0031] Figure 5 Testing results of the flexural stiffness modulus of each embodiment of the present invention;

[0032] Figure 6 Schematic diagram of the principle of toughener synthesis and toughener-modified furan resin of the present invention. Detailed Embodiments

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0034] Unless otherwise defined, all professional and scientific terms used herein have the same meaning as those familiar to those skilled in the art. In addition, any methods and materials similar or equivalent to the described content can be applied to the present invention. The preferred implementation methods and materials described herein are for illustrative purposes only and do not limit the content of this application.

[0035] In the experimental methods of the following examples, unless otherwise specified, they are all conventional methods. Unless otherwise specified, the test materials used in the following examples are all purchased from commercial channels. Anti-stripping agents, antioxidants, and stabilizers all use conventional reagents in this industry.

[0036] The toughening agent in the following examples is a polyethylene glycol solution with furfuryl alcohol groups at both ends obtained by modifying polyethylene glycol with furfuryl alcohol. The principles of toughening agent synthesis and toughening agent-modified furan resin are as Figure 6 shown. The specific preparation method of the toughening agent is as follows: Select 50 g of polyethylene glycol liquid with a molecular weight of 400 and add it to a 500 mL three-necked flask equipped with a thermometer, a stirring device, and a reflux condenser. Add hydrochloric acid solution to maintain the pH value at about 4. Heat it to a temperature of 75 °C, then add 24.5 g of furfuryl alcohol solution, keep the reaction warm for 1 h, and then remove the excess water in the product to obtain a polyethylene glycol solution with furfuryl alcohol structures at both ends.

[0037] Example 1

[0038] A reactive asphalt cold patching liquid based on furan resin in this example includes the following raw materials in parts by weight: 100 parts of matrix asphalt, 20 parts of diluent, 10 parts of furan resin, 2.5 parts of curing agent A, 0.8 part of compatibilizer, and 1 part of toughening agent.

[0039] The asphalt cold patching material in this example includes the following raw materials in parts by weight: 93.5 parts of aggregate, 1.5 parts of mineral powder, and 5 parts of asphalt cold patching liquid.

[0040] In this example, the aggregate is basalt, and its SiO2 content is between 40% and 50%. The aggregate gradation is LB-10.

[0041] In this example, the passing rate of the mineral powder through the 0.075 mm sieve hole should be controlled within a range not lower than 85.0%, and the plasticity index should be less than 4.

[0042] In this example, the matrix asphalt is petroleum asphalt.

[0043] In this example, the diluent is made by mixing 40% butyl glycidyl ether (BGE), 50% aromatic oil, 4% anti-stripping agent, 3% antioxidant, and 3% stabilizer.

[0044] In this example, the furan resin is furfural furan resin.

[0045] In this example, curing agent A is citric acid monohydrate, and its content ≥ 99.5% (calculated as the monohydrate).

[0046] The compatibilizer is formaldehyde.

[0047] The preparation method of the cold asphalt replenishing liquid in this embodiment includes:

[0048] Step 1: Heat the matrix asphalt to 120 °C to make it in a flowing state;

[0049] Step 2: Add the diluent to the heated matrix asphalt in Step 1 and stir for 30 min under the condition of 120 °C;

[0050] Step 3: Cool down. When the temperature drops to 55 °C, add furfural furan resin, toughening agent and compatibilizer, continue to stir for 1 h, then add curing agent A, stir for 4 min at a rotation speed of 550 r / min to obtain the cold asphalt replenishing liquid, and cool the cold asphalt replenishing liquid to room temperature for standby.

[0051] The preparation method of the cold asphalt mixture in this embodiment includes: At room temperature, pour 93.5 parts of aggregate with a grading of LB-10 into the mixing pot and stir evenly, then pour in 5 parts of the cold asphalt replenishing liquid, stir for about 90 s, then add 1.5 parts of mineral powder, and continue to stir for about 90 s, for a total stirring time of about 3 minutes to obtain the cold asphalt mixture.

[0052] Add 2.5 parts of curing agent B (40% mass concentration p-toluenesulfonic acid solution) to the prepared cold asphalt mixture, stir for 10 - 30 s, and then prepare specimens that meet the performance requirements for testing for testing.

[0053] Comparative Example 1

[0054] This comparative example is basically the same as Example 1, except that the cold asphalt replenishing liquid in Comparative Example 1 does not contain a compatibilizer and a toughening agent.

[0055] Comparative Example 2

[0056] This comparative example is basically the same as Example 1, except that the weight part of curing agent A in Comparative Example 1 is 4.5 parts, and the weight part of curing agent B is 4.5 parts.

[0057] Comparative Example 3

[0058] This comparative example is basically the same as Example 1, except that the weight part of curing agent A in Comparative Example 1 is 0.4 parts, and the weight part of curing agent B is 0.4 parts.

[0059] Table 1 Performance of the cold asphalt mixture in Example 1 and Comparative Examples 1 - 3

[0060]

[0061] It can be seen from the experimental data in Table 1 that an appropriate increase in the curing agent can significantly shorten the strength forming time of the cold asphalt mixture. However, too much curing agent will have an adverse effect on the workability of the cold asphalt mixture during construction.

[0062] Example 2

[0063] A reactive asphalt cold replenishing liquid based on furan resin in this embodiment comprises the following raw materials in parts by weight: 100 parts of matrix asphalt, 20 parts of diluent, 2 parts of furan resin, 0.5 part of curing agent A, 0.2 part of compatibilizer, and 1 part of toughening agent.

[0064] The asphalt cold patch material in this embodiment comprises the following raw materials in parts by weight: 93.5 parts of aggregate, 1.5 parts of mineral powder, and 5 parts of asphalt cold replenishing liquid.

[0065] In this embodiment, the aggregate is basalt, its SiO2 content is between 40% and 50%, and the aggregate gradation is LB-10.

[0066] In this embodiment, the passing rate of the 0.075mm sieve hole of the mineral powder should be not less than 85.0%, and the plasticity index should be less than 4.

[0067] In this embodiment, the matrix asphalt is petroleum asphalt.

[0068] In this embodiment, the diluent is made by mixing 30% of butyl glycidyl ether (BGE), 56% of aromatic oil, 5% of anti-stripping agent, 5% of antioxidant, and 4% of stabilizer.

[0069] In this embodiment, the furan resin is furfural furan resin.

[0070] In this embodiment, the curing agent A is citric acid monohydrate, and its content ≥ 99.5% (calculated as monohydrate).

[0071] The compatibilizer is trioxane.

[0072] The preparation method of the asphalt cold replenishing liquid in this embodiment includes:

[0073] Step 1: Heat the matrix asphalt to 105°C to make it in a flowing state;

[0074] Step 2: Add the diluent to the heated matrix asphalt in Step 1 and stir for 50 min at 105°C;

[0075] Step 3: Cool down. When the temperature drops to 50°C, add furfural furan resin, toughening agent, and compatibilizer, continue to stir for 2 h, then add curing agent A and stir for 5 min at a rotation speed of 400 r / min to obtain the asphalt cold replenishing liquid, and cool the asphalt cold replenishing liquid to room temperature for standby.

[0076] The preparation method of the asphalt cold patch material in this embodiment includes: at room temperature, pour 93.5 parts of aggregate with the gradation of LB-10 into the mixing pot and stir evenly, then pour in 5 parts of asphalt cold replenishing liquid and stir for about 90 s, then add 1.5 parts of mineral powder and continue to stir for about 90 s, and stir for about 3 minutes in total to obtain the asphalt cold patch material.

[0077] Add 0.5 part of curing agent B (p-toluenesulfonic acid solution with a mass concentration of 60%) to the prepared cold asphalt mixture, stir for 10 - 30 s, and then prepare specimens that meet the performance requirements for testing.

[0078] Example 3

[0079] A reactive cold asphalt liquid based on furan resin in this example includes the following raw materials in parts by weight: 100 parts of matrix asphalt, 20 parts of diluent, 10 parts of furan resin, 4 parts of curing agent A, 0.2 part of compatibilizer, and 1 part of toughening agent.

[0080] The cold asphalt mixture in this example includes the following raw materials in parts by weight: 93.5 parts of aggregate, 1.5 parts of mineral powder, and 5 parts of cold asphalt liquid.

[0081] In this example, the aggregate is basalt, its SiO2 content is between 40% and 50%, and the aggregate gradation is LB - 10.

[0082] In this example, the passing rate of the 0.075 mm sieve hole of the mineral powder should be not less than 85.0%, and the plasticity index should be less than 4.

[0083] In this example, the matrix asphalt is petroleum asphalt.

[0084] In this example, the diluent is made by mixing 50% of butyl glycidyl ether (BGE), 44% of aromatic oil, 2% of anti - stripping agent, 2% of antioxidant, and 2% of stabilizer.

[0085] In this example, the furan resin is furfural - furan resin.

[0086] In this example, curing agent A is citric acid monohydrate, and its content ≥ 99.5% (calculated as the monohydrate).

[0087] The compatibilizer is trioxane.

[0088] The preparation method of the cold asphalt liquid in this example includes:

[0089] Step 1: Heat the matrix asphalt to 140 °C to make it in a flowing state;

[0090] Step 2: Add the diluent to the matrix asphalt heated in Step 1 and stir at 140 °C for 40 min;

[0091] Step 3: Cool. When the temperature drops to 60 °C, add furfuryl urea - formaldehyde resin, toughening agent, and compatibilizer, continue to stir for 1.5 h, then add curing agent A, stir for 3 min at a rotation speed of 800 r / min to obtain the cold asphalt liquid, and cool the cold asphalt liquid to room temperature for standby.

[0092] The preparation method of the cold asphalt patching material in this embodiment includes: at normal temperature, pour 93.5 parts of aggregate with a grading of LB-10 into a mixing pot and stir evenly, then pour in 5 parts of cold asphalt liquid, stir for about 90 s, add 1.5 parts of mineral powder, and continue to stir for about 90 s, and stir for about 3 minutes in total to obtain the cold asphalt patching material.

[0093] Add 4 parts of curing agent B (p-toluenesulfonic acid solution with a mass concentration of 30%) to the prepared cold asphalt patching material, stir for 10 - 30 s, and then prepare specimens that meet the performance requirements for testing.

[0094] Example 4

[0095] Compared with Example 3, the difference in this embodiment is that the composition materials of the cold asphalt liquid are as follows by weight: 100 parts of asphalt, 10 parts of diluent, 2 parts of furan resin, 0.5 part of curing agent A, 0.2 part of compatibilizer, and 1.2 parts of toughening agent. Others are the same.

[0096] Example 5

[0097] Compared with Example 3, the difference in this embodiment is that the composition materials of the cold asphalt liquid are as follows by weight: 100 parts of asphalt, 20 parts of diluent, 4 parts of furan resin, 1 part of curing agent A, 0.32 part of compatibilizer, and 1 part of toughening agent. Others are the same.

[0098] Example 6

[0099] Compared with Example 3, the difference in this embodiment is that the composition materials of the cold asphalt liquid are as follows by weight: 100 parts of asphalt, 20 parts of diluent, 6 parts of furan resin, 1.5 parts of curing agent A, 0.48 part of compatibilizer, and 1.5 parts of toughening agent. Others are the same.

[0100] Example 7

[0101] Compared with Example 3, the difference in this embodiment is that the composition materials of the cold asphalt liquid are as follows by weight: 100 parts of asphalt, 20 parts of diluent, 7 parts of furan resin, 2 parts of curing agent A, 0.56 part of compatibilizer, and 1.75 parts of toughening agent. Others are the same.

[0102] Example 8

[0103] Compared with Example 3, the difference in this embodiment is that the composition materials of the cold asphalt liquid are as follows by weight: 100 parts of asphalt, 20 parts of diluent, 8 parts of furan resin, 2 parts of curing agent A, 0.68 part of compatibilizer, and 2 parts of toughening agent. Others are the same.

[0104] Example 9

[0105] This embodiment is different from Embodiment 3 in that the composition materials of the cold replenishing liquid are as follows by weight: 100 parts of asphalt, 30 parts of diluent, 9 parts of furan resin, 4 parts of curing agent A, 2 parts of compatibilizer, and 3 parts of toughening agent. Others are the same.

[0106] The initial strength, forming strength, high-temperature resistance, and low-temperature resistance of the cold patch asphalt mixtures prepared in each embodiment and comparative example were tested.

[0107] The Marshall test method was used for the initial strength and forming strength tests. The method referred to the asphalt mixture Marshall stability test in the "Specifications for Tests of Bitumen and Bituminous Mixtures for Highway Engineering" (JTG E20-2011). The initial strength test method was as follows: Take 1200 g of cold patch asphalt mixture and place it in a constant temperature oven at 25°C for 2 h. Then take it out, mold it, and compact the specimen on both sides with a Marshall compactor 75 times each. After demolding, keep it in a constant temperature water bath at 25°C for 30 min, and then take it out to measure its strength. The forming strength test method: Take 1200 g of cold patch asphalt mixture, put it into the test mold, and compact it on both sides with a Marshall compactor 50 times each. Then place it in a constant temperature oven at 60°C for 24 h of curing. After that, take it out and compact it on both sides with a Marshall compactor 25 times each, and then cure it at room temperature for 24 h. After the room temperature curing is completed, keep it in a constant temperature water bath at 60°C for 30 min, and measure its strength after 30 min of water bath. The test results are shown in Figure 1 .

[0108] The rutting test method was used for the high-temperature resistance test. The method referred to the asphalt mixture rutting test in the "Specifications for Tests of Bitumen and Bituminous Mixtures for Highway Engineering" (JTG E20-2011). The specific steps were as follows: Weigh 10 kg of cold patch asphalt mixture and put it into the rutting plate test mold. At normal temperature of 25°C, roll the rutting plate back and forth 12 times on a rutting compactor, cure it under natural conditions for 12 h, then roll it back and forth 8 times for supplementary compaction, and then place it for 14 d of curing under natural conditions. Finally, test the dynamic stability of the specimen according to the conventional rutting test method, and the wheel load conditions were 60 W and 0.7 MPa. The test results are shown in Figure 2 .

[0109] The small beam bending test method was used for the low-temperature resistance test. The method referred to the asphalt mixture low-temperature small beam bending test in the "Specifications for Tests of Bitumen and Bituminous Mixtures for Highway Engineering" (JTG E20-2011). After the rutting plate was compacted and formed, it was cured under natural conditions for 20 d and then cut into small beam specimens. The size of the small beam specimens was 250×30×35 mm, the test temperature was -10°C, and the loading rate was 50 mm / min. The test results are shown in Figures 3 - 5 .

[0110] According to the experimental data and the results of the drawings in Embodiments 1 to 9, each embodiment showed significantly better technical effects than the industry standards. The specific performance comparisons are as follows:

[0111] AsFigure 1 As shown, the initial strength (3h) of all examples exceeds 2 kN, and the forming strength (24h) is higher than 5 kN. By improving the synergistic effect of furan resin and toughening agent, the early strength and curing efficiency of Examples 6 to 9 are further optimized compared with the basic formulation, verifying the positive effect of the adjustment of component ratio on the crosslinking density of the material.

[0112] Figure 2 The rutting resistance test shows that the rutting resistance of each example far exceeds the industry benchmark, and the dynamic stability of Examples 1 to 9 is particularly prominent. By controlling the mixing ratio range of furan resin and toughening agent, the three-dimensional network structure of the material is strengthened, and it can still maintain stable anti-deformation ability under high-temperature environment. As Figures 3 to 5 shown, the flexural strength, flexural strain and flexural stiffness modulus of all examples are significantly better than those of traditional cold patch materials. In particular, Examples 6 to 9 show excellent anti-cracking performance under extremely low temperature conditions through optimizing the ratio of resin and toughening agent, fully meeting the requirements of relevant technical specifications.

[0113] Each example can use bio-based furan resin (such as renewable raw materials like corncobs and wheat straws), meeting the green environmental protection standards. By balancing the resin content and workability in construction, while ensuring performance, the synergistic optimization of construction efficiency and environmental protection requirements is achieved.

[0114] Examples 1 to 9 verify the wide applicability of the cold patch liquid formulation. Among them, Examples 6 to 9 have the best comprehensive performance, with balanced improvement in early strength, high-temperature stability and low-temperature anti-cracking performance, suitable for different climate and load conditions.

[0115] Example 10

[0116] A reactive asphalt cold patch liquid based on furan resin in this example includes the following raw materials in parts by weight: 100 parts of matrix asphalt, 20 parts of diluent, 10 parts of furan resin, 2.5 parts of curing agent A, 0.8 part of compatibilizer, and 1 part of toughening agent.

[0117] The asphalt cold patch material in this example includes the following raw materials in parts by weight: 90 parts of aggregate, 1 part of mineral powder, and 10 parts of asphalt cold patch liquid.

[0118] In this example, the aggregate is basalt, its SiO2 content is between 40% and 50%, and the aggregate gradation is LB-10.

[0119] In this example, the passing rate of the mineral powder through the 0.075 mm sieve hole should be controlled not less than 85.0%, and the plasticity index should be less than 4.

[0120] In this example, the matrix asphalt is coal tar pitch (which can also be replaced by one or several of petroleum asphalt, coal tar pitch, rock asphalt and thermoplastic polymer modified asphalt).

[0121] In this embodiment, the diluent is made by mixing 46% butyl glycidyl ether (BGE), 40% aromatic oil, 5% anti-stripping agent, 5% antioxidant and 4% stabilizer.

[0122] In this embodiment, the furan resin is furfuryl alcohol resin (one or several of furfural furan resin, furfuryl alcohol urea resin, furfuryl alcohol resin, furfural acetone resin, urea-modified furan resin, phenolic-modified furan resin, ketophenolic-modified furan resin, ureophenolic-modified furan resin, formaldehyde-modified furan resin and high furan resin can be used instead).

[0123] In this embodiment, the curing agent A is citric acid monohydrate, and the content is ≥ 99.5% (calculated as the monohydrate).

[0124] The compatibilizer is formaldehyde.

[0125] The preparation method of the cold asphalt replenishing liquid in this embodiment includes:

[0126] Step 1: Heat the matrix asphalt to 120 °C to make it in a flowing state;

[0127] Step 2: Add the diluent to the heated matrix asphalt in Step 1 and stir for 30 min at 120 °C;

[0128] Step 3: Cool. When the temperature drops to 55 °C, add furfuryl alcohol resin, toughening agent and compatibilizer, continue to stir for 1 h, then add curing agent A and stir for 4 min at a rotation speed of 550 r / min to obtain the cold asphalt replenishing liquid, and cool the cold asphalt replenishing liquid to room temperature for standby.

[0129] The preparation method of the cold asphalt mixture in this embodiment includes: At normal temperature, pour 93.5 parts of aggregate with a grading of LB-10 into the mixing pot and stir evenly, then pour in 5 parts of the cold asphalt replenishing liquid, stir for about 90 s, then add 1.5 parts of mineral powder, and continue to stir for about 90 s. Stir for about 3 minutes in total to obtain the cold asphalt mixture.

[0130] Add 2.5 parts of curing agent B (30% p-toluenesulfonic acid solution by mass concentration) to the prepared cold asphalt mixture, stir for 10 - 30 s, and then prepare specimens that meet the performance requirements for testing for testing.

[0131] Example 11

[0132] A reaction-type cold asphalt replenishing liquid based on furan resin in this embodiment includes the following raw materials in parts by weight: 100 parts of matrix asphalt, 20 parts of diluent, 10 parts of furan resin, 2.5 parts of curing agent A, 0.8 part of compatibilizer, and 1 part of toughening agent.

[0133] The cold asphalt patch material of this embodiment comprises raw materials in the following parts by weight: 100 parts of aggregate, 4 parts of mineral powder, and 3 parts of cold asphalt liquid.

[0134] In this embodiment, the aggregate is basalt, with its SiO2 content between 40% and 50%, and the aggregate gradation is LB-10.

[0135] In this embodiment, the passing rate of the mineral powder through a 0.075mm sieve hole should be controlled within a range not lower than 85.0%, and the plasticity index should be less than 4.

[0136] In this embodiment, the base asphalt is rock asphalt (one or several of petroleum asphalt, coal asphalt, rock asphalt, and thermoplastic polymer modified asphalt can also be used for substitution).

[0137] In this embodiment, the diluent is made by mixing 30% butyl glycidyl ether (BGE), 60% aromatic oil, 4% anti-stripping agent, 3% antioxidant, and 3% stabilizer.

[0138] In this embodiment, the furan resin is phenolic modified furan resin (one or several of furfural furan resin, furfuryl urea formaldehyde resin, furfuryl alcohol resin, furfural acetone resin, urea modified furan resin, phenolic modified furan resin, ketone phenolic modified furan resin, urea phenolic modified furan resin, formaldehyde modified furan resin, and high furan resin can also be used for substitution).

[0139] In this embodiment, the curing agent A is citric acid monohydrate, and its content ≥ 99.5% (calculated as the monohydrate).

[0140] The compatibilizer is formaldehyde.

[0141] The preparation method of the cold asphalt liquid of this embodiment includes:

[0142] Step 1: Heat the base asphalt to 120°C to make it in a flowing state;

[0143] Step 2: Add the diluent to the base asphalt heated in Step 1, and stir at 120°C for 30 min;

[0144] Step 3: Cool. When the temperature drops to 55°C, add phenolic modified furan resin, toughening agent, and compatibilizer, continue to stir for 1 h, then add curing agent A, stir for 4 min, at a rotation speed of 550 r / min, to obtain the cold asphalt liquid. Cool the cold asphalt liquid to room temperature for standby.

[0145] The preparation method of the cold asphalt patch material of this embodiment includes: At normal temperature, pour 93.5 parts of aggregate with a gradation of LB-10 into a mixing pot and stir evenly, then pour in 5 parts of cold asphalt liquid, stir for about 90 s, then add 1.5 parts of mineral powder, and continue to stir for about 90 s. Stir for about 3 minutes in total to obtain the cold asphalt patch material.

[0146] Add 2.5 parts of curing agent B (p-toluenesulfonic acid solution with a mass concentration of 60%) to the prepared cold asphalt mixture, stir for 10 - 30 s, and then prepare specimens that meet the performance requirements for testing.

[0147] Table 2 Performance of the cold asphalt mixture in Examples 10 and 11

[0148]

[0149] It can be seen from the experimental data in Table 2 that the performance of the cold asphalt mixture in Examples 10 and 11 meets the technical requirements.

[0150] In summary, the present invention not only has innovation in theory, but also demonstrates excellent performance in practical applications. Especially in improving the high-temperature stability and low-temperature resistance of the cold asphalt mixture, it has obvious technical advantages and application potential.

[0151] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A reactive asphalt cold replenishing liquid based on furan resin, characterized in that, It comprises the following raw materials in parts by weight: 100 parts of matrix asphalt, 10 - 30 parts of diluent, 2 - 10 parts of furan resin, 0.5 - 4 parts of curing agent A, 0.2 - 2 parts of compatibilizer, and 1 - 3 parts of toughening agent.

2. The reactive asphalt cold replenishing liquid based on furan resin according to claim 1, characterized in that The diluent is made by mixing butyl glycidyl ether, aromatic oil, anti-stripping agent, antioxidant and stabilizer; the mass content of butyl glycidyl ether in the diluent is 30% - 50%, the mass content of aromatic oil is 40% - 60%, the mass content of anti-stripping agent is 2% - 5%, the mass content of antioxidant is 2% - 5% and the mass content of stabilizer is 2% - 4%.

3. A reactive asphalt cold replenishing liquid based on furan resin according to claim 1, characterized in that, The furan resin is one or more of furfural furan resin, furfuryl alcohol urea formaldehyde resin, furfuryl alcohol resin, furfural acetone resin, urea formaldehyde modified furan resin, phenolic modified furan resin, ketophenolic modified furan resin, ureaphenolic modified furan resin, formaldehyde modified furan resin and high furan resin; the compatibilizer is formaldehyde and / or trioxane; the curing agent A is citric acid monohydrate.

4. A reactive asphalt cold replenishing liquid based on furan resin according to claim 1, characterized in that, The toughening agent is a polyethylene glycol solution with furfuryl alcohol groups at both ends obtained by modifying polyethylene glycol with furfuryl alcohol; the matrix asphalt includes one or more of petroleum asphalt, coal tar pitch, rock asphalt and thermoplastic polymer modified asphalt.

5. A method for preparing the reactive asphalt cold replenishing liquid as described in claim 1, characterized in that, It comprises the following steps: Step 1: Heat the matrix asphalt to 105°C - 140°C to make it in a flowing state. Step 2: Add the diluent to the heated matrix asphalt in Step 1 and stir at 105°C - 140°C for 30 min - 50 min. Step 3: Cool down. When the temperature drops to 50°C - 60°C, add the furan resin, toughening agent and compatibilizer, continue to stir for 1 h - 2 h, then add the curing agent A, stir for 3 min - 5 min, with the rotation speed of 400 r / min - 800 r / min to obtain the cold asphalt replenishing liquid.

6. A cold asphalt patch material based on the reactive cold asphalt replenishing liquid according to claim 1, characterized in that, It comprises the following raw materials in parts by weight: 90 - 100 parts of aggregate, 1 - 4 parts of mineral powder, and 3 - 10 parts of cold asphalt replenishing liquid.

7. The cold asphalt patch material according to claim 6, characterized in that, The aggregate is basalt, the mass content of SiO2 in the aggregate is between 40% - 50%, and the aggregate gradation conforms to LB - 10 or LB - 15 specified in JTG F40 - 2004; the passing rate of the mineral powder through the 0.075 mm sieve hole is not less than 85.0%, and the plasticity index is less than 4.

8. A method for preparing the cold asphalt patch material as described in claim 7, characterized in that, It includes: At normal temperature, pour the aggregate into the mixing pot and stir evenly, then add the cold asphalt replenishing liquid, stir and then add the mineral powder, and continue to stir to obtain the cold asphalt patch material.

9. A construction method of the cold asphalt patch material as described in claim 6, characterized in that, It includes: Pre - lay the cold asphalt patch material in the area to be constructed, then evenly spray the curing agent B on the laid cold asphalt patch material, and then roll and level it. The curing agent B is p - toluenesulfonic acid solution.

10. The construction method according to claim 9, wherein, The mass of the curing agent B is the same as the mass of the curing agent A in the cold asphalt replenishing liquid, and the mass concentration of the p - toluenesulfonic acid solution is 30% - 60%.

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