A toughened non-stick wheel modified emulsified asphalt and preparation method thereof

Abstract

The present invention provides a toughened non-stick wheel modified emulsified asphalt and a preparation method thereof. The raw materials for preparing the toughened non-stick wheel modified emulsified asphalt include by mass: 50 parts of 50# hard asphalt, 0.3-0.6 parts of emulsifier, 0.2-0.3 parts of stabilizer; 2-6 parts of modifier, 42.8-45 parts of water, and pH regulator. The 50# hard asphalt in the above scheme of the present invention has a high softening point and high temperature resistance, and is suitable for construction requirements under high temperature environment. It can provide good compressive strength, wear resistance and durability in the present invention. While ensuring the long-term stability and durability of the road, it can withstand a large traffic load. By adding an elastomer modifier and a reinforcing toughening agent, the toughness of the emulsified asphalt is significantly improved, so that its crack resistance at low temperature and stability at high temperature are greatly improved, showing stronger crack resistance and deformation resistance.

Description

Technical Field

[0001] The present application relates to the technical field of modified emulsified asphalt preparation, and in particular to a toughened non-stick wheel modified emulsified asphalt and a preparation method thereof. Background Art

[0002] Toughened non-stick wheel hard asphalt modified emulsified asphalt refers to the use of low-grade asphalt for emulsification. By adding emulsifying additives, the asphaltene clusters in the low-grade asphalt are dispersed, overcoming the problem of high viscosity and difficulty in emulsification caused by the easy aggregation of asphaltene in the heavy component, and improving the wear resistance, adhesion and shear resistance of the emulsified asphalt, ensuring that the wheels will not stick during construction and ensuring the bonding effect of the adhesive layer.

[0003] At present, the preparation method of non-stick wheel emulsified asphalt uses hard asphalt as the basic raw material, and is prepared by adding auxiliary materials such as emulsifiers, modifiers, thickeners, etc., and undergoing a specific emulsification process; a common preparation method is to first heat the hard asphalt to an appropriate temperature, then add emulsifiers and water to form a soap solution, and then use equipment such as a colloid mill or a sand mill to emulsify the asphalt and the soap solution at high speed shear. Although the non-stick wheel emulsified asphalt prepared by this method has certain non-stick wheel performance and bonding strength, it still has deficiencies in terms of toughness enhancement and storage stability.

[0004] The limitations of the existing non-stick wheel emulsified asphalt preparation technology are mainly reflected in insufficient toughness, poor storage stability, complex preparation process and limited selection of modifiers. The insufficient toughness is mainly due to the limited selection and addition of modifiers, resulting in no obvious improvement in the toughness of emulsified asphalt, and the poor storage stability is related to the instability of the emulsification process and the limitations of preparation conditions, resulting in stratification and precipitation of emulsified asphalt after long-term storage. In addition, the complexity of the preparation process and the limitations of modifier selection also increase the preparation cost and limit the performance improvement of emulsified asphalt.

[0005] In summary, the existing technical solutions still have some problems and shortcomings in the preparation of toughened non-stick wheel hard asphalt modified emulsified asphalt. Summary of the invention

[0006] The technical problem to be solved by the present invention is that the existing non-stick wheel emulsified asphalt has the problems of insufficient toughness enhancement, poor storage stability, complex preparation process and limited selection of modifiers.

[0007] In order to solve the above problems, the present invention provides a toughened non-stick wheel modified emulsified asphalt. The raw materials for preparing the toughened non-stick wheel modified emulsified asphalt include, by mass:

[0008] 50 parts of 50# hard asphalt, 0.3-0.6 parts of emulsifier, 0.2-0.3 parts of stabilizer;

[0009] 2 to 6 parts of a modifier, 42.8 to 45 parts of water, and a pH adjuster for adjusting the pH value.

[0010] The 50# hard asphalt in the above scheme of the present invention has a high softening point and high temperature resistance, and is suitable for construction requirements in high temperature environments. It can provide good compressive strength, wear resistance and durability in the present invention, and can withstand large traffic loads while ensuring long-term stability and durability of the road. By adding elastomer modifiers and reinforcing toughening agents, the toughness of the emulsified asphalt is significantly improved, so that its crack resistance at low temperatures and stability at high temperatures are greatly improved, showing stronger crack resistance and deformation resistance.

[0011] In the present invention, the emulsifier is used to stably disperse the asphalt in water to form a uniform emulsified substance.

[0012] According to the above scheme of the present invention, the emulsifier refers to at least one of a fast-breaking cationic type, a quaternary ammonium salt asphalt emulsifier of a heterocyclic structure, a carboxylic acid diquaternary ammonium salt type sodium hydroxypropyl sulfonate asphalt emulsifier, and a dialkylphenol polyamine asphalt emulsifier.

[0013] According to the above solution of the present invention, the stabilizer is a mixture of calcium chloride and carboxymethyl cellulose ether.

[0014] The stabilizer is composed of calcium chloride and carboxymethyl cellulose ether, which improves the stability of emulsified asphalt, can effectively increase the solubility of the emulsifier in water, and promote the emulsification of asphalt and water phase; carboxymethyl cellulose ether, as a thickener, can enhance the viscosity of the emulsion, prevent emulsion stratification, keep the asphalt particles evenly dispersed, and ensure that the emulsified asphalt will not demulsify during long-term storage or use.

[0015] According to the above aspect of the present invention, the pH adjuster is hydrochloric acid.

[0016] According to the above solution of the present invention, the modifier is at least one of a reinforcing toughening agent and an elastomer modifier.

[0017] Strengthening toughening agents mainly improve the crack resistance and flexibility of asphalt, making asphalt show better durability and fatigue resistance under low temperature and stress. Elastomer modifiers provide additional elasticity, enhance the anti-fluidity of emulsified asphalt in high temperature environment, and avoid excessive softening of asphalt at high temperature.

[0018] According to the above scheme of the present invention, the multi-chain polyolefin reinforcing and toughening agent is an ethylene-α-olefin copolymer elastomer, which has good flexibility and elasticity, and the ethylene-α-olefin copolymer elastomer is at least one of an ethylene-propylene copolymer, an ethylene-butene copolymer, and an ethylene-octene copolymer. The elastomer modifier is a waterborne polyurethane elastomer modifier.

[0019] The present invention also provides a method for preparing toughened non-stick wheel modified emulsified asphalt, comprising:

[0020] Heat 50# hard asphalt to a molten state for later use;

[0021] Determine the mass m of the remaining mixed liquid in the soap solution excluding the emulsifier and stabilizer according to the dosage of the emulsifier and stabilizer, take a certain amount of 63±3℃ hot water, slowly add the emulsifier and stabilizer into the water, and stir continuously until the emulsifier and water are integrated, use hydrochloric acid to adjust the pH value of the solution to 2-3, and continue to add 63±3℃ water to the mixed liquid until the mass of the mixed liquid excluding the emulsifier reaches m, and obtain soap solution;

[0022] Pour the prepared soap solution into the colloid mill for shearing, then slowly pour the molten 50# hard asphalt into the colloid mill for shearing;

[0023] After grinding and dispersing with a colloid mill, a non-stick wheel hard asphalt modified emulsified asphalt is obtained. After the emulsified asphalt is cooled, an elastomer modifier and a reinforcing toughening agent are added and stirred evenly to obtain a toughened non-stick wheel modified emulsified asphalt.

[0024] The above method of the present invention aims to prepare a non-stick wheel hard asphalt modified emulsified asphalt with excellent toughening and storage stability by optimizing the selection and addition amount of the modifier, improving the emulsification process and increasing the accuracy of the preparation conditions.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The 50# hard asphalt used in the present invention has a high softening point and high temperature resistance, and is suitable for construction needs under high temperature environments. It can provide good compressive strength, wear resistance and durability in the present invention, and can withstand a large traffic load while ensuring the long-term stability and durability of the road.

[0027] 2. The toughened non-stick wheel modified emulsified asphalt of the present invention significantly improves the toughness of the emulsified asphalt by adding an elastomer modifier and a reinforcing toughening agent, thereby greatly improving its crack resistance at low temperatures and stability at high temperatures, showing stronger crack resistance and deformation resistance.

[0028] 3. The stabilizer of the present invention is composed of calcium chloride (CaCl2) and carboxymethyl cellulose ether (CMC) in a 1:1 ratio, which can enhance the viscosity of the emulsion, prevent emulsion stratification, keep the asphalt particles evenly dispersed, and ensure that the emulsified asphalt will not demulsify during long-term storage or use.

[0029] 4. The emulsified asphalt of the present invention has a dynamic viscosity of 60°C ≥6000 Pa·s, a softening point ≥65°C, and an elongation of 5°C ≥30 cm, indicating that the emulsified asphalt has excellent adhesion, heat resistance and low temperature resistance, and can meet the application requirements of road engineering in multiple scenarios.

[0030] 5. The method for preparing the toughened non-stick wheel modified emulsified asphalt of the present invention does not reduce the effectiveness of the elastomer modifier and the reinforcing toughening agent after adding the elastomer modifier and the reinforcing toughening agent. DETAILED DESCRIPTION

[0031] The following embodiments of the technical solution of the present application are described in detail. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0032] The present application provides a method for preparing toughened non-stick wheel modified emulsified asphalt:

[0033] Heat 50# hard asphalt at 143±3℃ until it is molten and set aside;

[0034] Determine the mass m of the remaining mixed liquid in the soap solution excluding the emulsifier and stabilizer according to the dosage of the emulsifier and stabilizer, take 63±3℃ hot water with a mass of 0.8 times m, slowly add the emulsifier and stabilizer into the water, and stir continuously until the emulsifier and water are integrated, use hydrochloric acid to adjust the pH value of the solution to 2-3, and continue to add 63±3℃ water to the mixed liquid until the mass of the mixed liquid excluding the emulsifier reaches m, and obtain soap solution;

[0035] Pour the prepared soap solution into the colloid mill, turn on the colloid mill, shear for 20 to 30 minutes, then slowly pour the molten 50# hard asphalt into the colloid mill, shear for 2 to 3 minutes, and the shear rate is 3000r / min;

[0036] After grinding and dispersing with a colloid mill, a non-stick wheel hard asphalt modified emulsified asphalt is obtained. After the emulsified asphalt is cooled, an elastomer modifier and a reinforcing toughening agent are added and stirred evenly to prepare a toughened non-stick wheel modified emulsified asphalt.

[0037] According to the above embodiment, the obtained toughened non-stick wheel modified emulsified asphalt includes, by mass: 50 parts of 50# hard asphalt, 0.3-0.6 parts of emulsifier, 0.2-0.3 parts of stabilizer; 2-6 parts of modifier, 42.8-45 parts of water, and a pH adjuster for adjusting the pH value.

[0038] In the following embodiments, the emulsifiers include: fast-breaking cationic type (KL), quaternary ammonium salt asphalt emulsifier of heterocyclic structure (CHJ-1), carboxylic acid diquaternary ammonium salt type sodium hydroxypropyl sulfonate asphalt emulsifier (CHJ-2), and dialkylphenol polyamine asphalt emulsifier (CHJ-3);

[0039] Strengthening and toughening agents include: multi-chain polyolefin strengthening and toughening agents ethylene-α-olefin copolymer elastomers; elastomer modifiers include: waterborne polyurethane elastomer modifiers (WBPU)

[0040] In the present application, the ethylene-α-olefin copolymer elastomer can be selected from ethylene-propylene copolymer (EPC), ethylene-butene copolymer (EBC), ethylene-octene copolymer (POE) and the like.

[0041] In the following examples, polyvinyl acetate is represented by PVAC; ethylene-vinyl acetate block copolymer is represented by EVA; and styrene-butadiene-styrene block copolymer is represented by SBS.

[0042] In the following specific embodiments, the toughened non-stick wheel modified emulsified asphalt obtained according to the above method is as follows:

[0043] Example 1

[0044] In this embodiment, the toughened non-stick wheel modified emulsified asphalt includes, by mass: 50 parts of 50# hard asphalt, 0.5 parts of fast-cracking cationic emulsifier, 0.2 parts of stabilizer, 4 parts of modifier, 0.5 parts of pH adjuster, and the remainder is made up with water. The modifier is a mixture of reinforcing toughening agent and elastomer modifier prepared in a ratio of 1:1; the stabilizer is a mixture of calcium chloride and carboxymethyl cellulose ether prepared in a ratio of 1:1.

[0045] Example 2

[0046] The dosage of the emulsifier in the toughened non-stick wheel modified emulsified asphalt of Example 2 is different from that of Example 1, and the rest is the same as that of Example 1, specifically:

[0047] The emulsifier is CHJ-1; the dosage is 0.3 parts; see Table 1 for details.

[0048] Example 3

[0049] The type and dosage of the emulsifier in the toughened non-stick wheel modified emulsified asphalt of Example 3 are different from those of Example 1, and the rest are the same as Example 1, specifically:

[0050] The emulsifier is CHJ-2; the dosage is 0.6 parts; see Table 1 for details.

[0051] Example 4

[0052] The type and dosage of the emulsifier in the toughened non-stick wheel modified emulsified asphalt of Example 4 are different from those of Example 1, and the rest are the same as Example 1, specifically:

[0053] The emulsifier is CHJ-3 additive; the dosage is 0.5 parts; see Table 1 for details.

[0054] Example 5

[0055] The dosage of the stabilizer in the toughened non-stick wheel modified emulsified asphalt of Example 5 is different from that of Example 1, and the rest is the same as that of Example 1, specifically:

[0056] The dosage of stabilizer is 0.3 parts, see Table 1 for details.

[0057] Example 6

[0058] The type and dosage of the modifier in the toughened non-stick wheel modified emulsified asphalt of Example 6 are different from those of Example 1, and the rest are the same as those of Example 1, specifically:

[0059] The modifier is a reinforcing and toughening agent, and the dosage is 4 parts; see Table 1 for details.

[0060] Example 7

[0061] The type and dosage of the modifier in the toughened non-stick wheel modified emulsified asphalt of Example 7 are different from those of Example 1, and the rest are the same as those of Example 1, specifically:

[0062] The modifier is an elastomer modifier, and the dosage is 4 parts; see Table 1 for details.

[0063] Example 8

[0064] The dosage of the modifier in the toughened non-stick wheel modified emulsified asphalt of Example 8 is different from that of Example 1, and the rest is the same as that of Example 1, specifically:

[0065] The modifier is a mixture of a reinforcing toughening agent and an elastomer modifier in a ratio of 1:1; the dosage is 6 parts; see Table 1 for details.

[0066] Comparative Example 1

[0067] The difference between Comparative Example 1 and Example 1 is that the type and dosage of hard asphalt are different from those in Example 1, and the rest are the same as Example 1, specifically:

[0068] The hard asphalt is 30# hard asphalt, and the dosage is 60 parts; see Table 1 for details.

[0069] Comparative Example 2

[0070] The difference between Comparative Example 2 and Example 1 is that no modifier (reinforcement toughening agent and elastomer modifier) ​​is added, and the rest is the same as Example 1, see Table 1 for details.

[0071] Comparative Example 3

[0072] The difference between Comparative Example 3 and Example 1 is that the reinforcing and toughening agent is polyvinyl acetate, and the rest is the same as Example 1, see Table 1 for details.

[0073] Comparative Example 4

[0074] The difference between Comparative Example 4 and Example 1 is that the reinforcing and toughening agent is ethylene-vinyl acetate block copolymer, and the rest is the same as Example 1, see Table 1 for details.

[0075] Comparative Example 5

[0076] The difference between Comparative Example 5 and Example 1 is that the reinforcing and toughening agent is styrene-butadiene-styrene block copolymer, and the other components are the same as Example 1, as shown in Table 1 for details.

[0077] Comparative Example 6

[0078] The difference between Comparative Example 6 and Example 1 is that SBS modified asphalt is used instead of 50# hard asphalt, and the rest is the same as Example 1, specifically:

[0079] The SBS modified asphalt includes, by mass: 100 parts of 70# base asphalt, 4.5 parts of YH-791H linear SBS modifier, and 2 parts of modifier, where the modifier is a silicone resin interfacial enhancer.

[0080] The non-stick wheel SBS modified emulsified asphalt includes, by mass: 60 parts of 70# base asphalt, 0.5 parts of slow-cracking cationic emulsifier, 0.2 parts of stabilizer, 0.3 parts of pH adjuster, and the rest is made up with water.

[0081] The above-mentioned non-stick wheel SBS modified emulsified asphalt is prepared by the following method: slowly adding an emulsifier and a stabilizer into water at 65-70°C according to a specified proportion, slowly adding an emulsifier into water, and constantly stirring until the emulsifier and water are integrated, using hydrochloric acid to adjust the pH value of the solution to 2-3 to obtain a soap solution, and keeping it warm for use; pouring the soap solution into a colloid mill, turning on the colloid mill, and shearing for 10-20 minutes; slowly pouring the SBS modified emulsified asphalt in a molten state at 145°C to 150°C into the colloid mill, shearing for 3-5 minutes, and the shear rate is 3000r / min; after grinding and dispersing in a colloid mill, the non-stick wheel SBS modified emulsified asphalt is obtained.

[0082] Comparative Example 7

[0083] The difference between Comparative Example 7 and Example 1 is that the steps in the preparation process are different, specifically:

[0084] Heat 50# hard asphalt at 143±3℃ until it is molten and set aside;

[0085] Determine the mass m of the remaining mixed liquid in the soap solution excluding the emulsifier and stabilizer according to the dosage of the emulsifier and stabilizer, take 63±3℃ hot water with a mass of 0.8 times m, slowly add the emulsifier, stabilizer, elastomer modifier and reinforcing toughening agent into the water, and stir continuously until the emulsifier and water are integrated, adjust the pH value of the solution to 2-3 with hydrochloric acid, and continue to add 63±3℃ water to the mixed liquid until the mass of the mixed liquid excluding the emulsifier reaches m, and obtain the soap solution;

[0086] Pour the prepared soap solution into the colloid mill, turn on the colloid mill, shear for 20 to 30 minutes, then slowly pour the molten 50# hard asphalt into the colloid mill, shear for 2 to 3 minutes, and the shear rate is 3000r / min;

[0087] After grinding and dispersing by a colloid mill, a non-stick wheel hard asphalt modified emulsified asphalt is obtained. After the emulsified asphalt is cooled, a toughened non-stick wheel modified emulsified asphalt can be prepared.

[0088] Table 1: Composition of modified emulsified asphalt obtained in each example and comparative example

[0089]

[0090]

[0091] The high-viscosity modified emulsified asphalts prepared in the above Examples 1-8 and Comparative Examples 1-7 were subjected to performance tests in accordance with the "Testing Procedures for Asphalt and Asphalt Mixtures in Highway Engineering" (JTG E20-2011). The results obtained are shown in Table 2.

[0092] Table 2 Performance test results of modified emulsified asphalt in Example and Comparative Example

[0093]

[0094] It can be found from Examples 1 to 8 that the needle penetration of the toughened non-stick wheel modified emulsified asphalt is in the range of 28 to 36 (0.1 mm), the softening point is greater than 55° C., and the dynamic viscosity at 60° C. is greater than 5000 Pa·s.

[0095] By comparing the above-mentioned Examples 6 and 7 with Example 1, it can be found that the toughened non-stick wheel modified emulsified asphalt obtained by adding the reinforcing toughening agent and the elastomer modifier at the same time has better performance.

[0096] Through Example 1 and Comparative Example 1, it can be found that the hard asphalt in Comparative Example 1 is 30# hard asphalt, and the dosage is 60 parts. The needle penetration, force ductility, maximum tensile force at 5°C, dynamic viscosity at 60°C, force ductility, adhesion pull-out strength and other indicators in Comparative Example 1 are significantly lower than those in Example 1. This shows that the type of hard asphalt also affects the performance of toughened non-stick wheel emulsified asphalt.

[0097] Through Examples 1 to 8 and Comparative Example 2, it can be found that the force-measuring ductility, maximum tensile force at 5°C, dynamic viscosity at 60°C, adhesion pull-out strength and other indicators of Examples 1 to 8 are significantly higher than those of Comparative Example 2. This shows that the addition of the reinforcing toughening agent and the elastomer modifier will change the low-temperature toughness of the toughened non-stick wheel modified emulsified asphalt.

[0098] Through Example 1 and Comparative Example 3, it can be found that compared with Example 1, the 60°C dynamic viscosity in Comparative Example 3 decreases significantly; it does not meet the requirements of non-stick wheel emulsified asphalt, especially the force ductility decreases significantly; the adhesion pull strength also decreases. This shows that the effect of polyvinyl acetate (PVAC) reinforcing toughening agent is general and cannot meet the index requirements of non-stick wheel emulsified asphalt.

[0099] Through Example 1 and Comparative Example 4, it can be found that compared with Example 1, the 60°C dynamic viscosity of Comparative Example 4 has a significant decrease, which does not meet the requirements of non-stick wheel emulsified asphalt. The ethylene-vinyl acetate block copolymer (EVA) reinforcing toughening agent has also significantly decreased in terms of force ductility and adhesion pull strength, and the 60°C dynamic viscosity does not meet the index requirements of non-stick wheel emulsified asphalt. At the same time, from the perspective of non-stick wheel effect, Comparative Example 4 has a poor effect. This shows that polyvinyl acetate (PVAC) cannot meet the index requirements of non-stick wheel emulsified asphalt.

[0100] Through Example 1 and Comparative Example 5, it can be found that compared with Example 1, the softening point of Comparative Example 2 is significantly reduced, only 83% of that of Example 1; the 60°C dynamic viscosity is reduced; at the same time, from the perspective of the non-stick wheel effect, the effect of Comparative Example 5 is not good. It shows that the styrene-butadiene-styrene block copolymer (SBS) reinforcing and toughening agent only improves the force measurement strength, the difference in adhesion and pull-out strength is small, and the softening point and 60°C dynamic viscosity do not meet the index requirements of non-stick wheel emulsified asphalt.

[0101] Through Example 1 and Comparative Example 6, it can be found that compared with Example 1, the 60°C dynamic viscosity in Comparative Example 6 has a large decrease, which is only 75% of that in Example 1, the force ductility decreases significantly, which is reduced by 32N, and the adhesion pull strength is also reduced, which is 64% of that in Example 1. In addition, from the perspective of the non-stick wheel effect, the effect of Comparative Example 5 is not good. This shows that the toughened non-stick wheel hard asphalt modified emulsified asphalt has better crack resistance and deformation resistance and stronger bonding ability than the ordinary non-stick wheel SBS modified emulsified asphalt.

[0102] Through Example 1 and Comparative Example 7, it can be found that compared with Example 1, the decrease in 60°C dynamic viscosity in Comparative Example 7 is the most obvious, which is only 70% of that in Example 1. At the same time, the dynamometric viscosity and softening point are both reduced; this shows that the preparation process of the toughened non-stick wheel modified emulsified asphalt has a great influence on the performance indicators, especially the timing of adding the elastomer modifier and the reinforcing toughening agent has a great influence on the performance indicators. In Comparative Example 7, the emulsifier, stabilizer, elastomer modifier and reinforcing toughening agent are added to the water, and are integrated with the emulsifier and water, thereby reducing the effectiveness of the elastomer modifier and the reinforcing toughening agent.

[0103] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A toughened non-stick wheel modified emulsified asphalt, characterized in that: The raw materials for preparing the toughened non-stick wheel modified emulsified asphalt include, by mass: 50 parts of 50# hard asphalt, 0.3-0.6 parts of emulsifier, 0.2-0.3 parts of stabilizer; 4 to 6 parts of a modifier, 42.8 to 45 parts of water, and a pH adjuster for adjusting the pH value.

2. The toughened non-stick wheel modified emulsified asphalt according to claim 1, characterized in that: The emulsifier is at least one of a fast-cracking cationic emulsifier, a quaternary ammonium salt asphalt emulsifier with a heterocyclic structure, a carboxylic acid diquaternary ammonium salt type sodium hydroxypropyl sulfonate asphalt emulsifier, and a dialkylphenol polyamine asphalt emulsifier.

3. The toughened non-stick wheel modified emulsified asphalt according to claim 1, characterized in that: The stabilizer is a mixture of calcium chloride and carboxymethyl cellulose ether.

4. The toughened non-stick wheel modified emulsified asphalt according to claim 1, characterized in that: The pH adjuster is hydrochloric acid.

5. The toughened non-stick wheel modified emulsified asphalt according to claim 1, characterized in that: The modifier is at least one of a reinforcing toughening agent and an elastomer modifier.

6. The toughened non-stick wheel modified emulsified asphalt according to claim 5, characterized in that: The reinforcing and toughening agent is a multi-chain polyolefin reinforcing and toughening agent.

7. The toughened non-stick wheel modified emulsified asphalt according to claim 6, characterized in that: The multi-chain polyolefin reinforcing and toughening agent is an ethylene-α-olefin copolymer elastomer.

8. The toughened non-stick wheel modified emulsified asphalt according to claim 7, characterized in that: The ethylene-α-olefin copolymer elastomer is at least one of an ethylene-propylene copolymer, an ethylene-butene copolymer and an ethylene-octene copolymer.

9. The toughened non-stick wheel modified emulsified asphalt according to claim 5, characterized in that: The elastomer modifier is a waterborne polyurethane elastomer modifier.

10. A method for preparing the toughened non-stick wheel modified emulsified asphalt according to any one of claims 1 to 9, characterized in that: include: Heat 50# hard asphalt to a molten state for later use; Determine the mass m of the remaining mixed liquid in the soap solution excluding the emulsifier and stabilizer according to the dosage of the emulsifier and stabilizer, take a certain amount of 63±3℃ hot water, slowly add the emulsifier and stabilizer into the water, and stir continuously until the emulsifier and water are integrated, use hydrochloric acid to adjust the pH value of the solution to 2-3, and continue to add 63±3℃ water to the mixed liquid until the mass of the mixed liquid excluding the emulsifier reaches m, and obtain the soap solution; Pour the prepared soap solution into the colloid mill for shearing, then slowly pour the molten 50# hard asphalt into the colloid mill for shearing; After grinding and dispersing with a colloid mill, a non-stick wheel hard asphalt modified emulsified asphalt is obtained. After the emulsified asphalt is cooled, an elastomer modifier and a reinforcing toughening agent are added and stirred evenly to obtain a toughened non-stick wheel modified emulsified asphalt.

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