Anti-falling agent, anti-falling bird repellent asphalt mixture and preparation method thereof

Abstract

The application discloses an anti-falling agent, an anti-falling bird-repellent asphalt mixture and a preparation method thereof. The anti-falling agent is prepared from the following raw materials: sulfur, naphthalene series, butadiene styrene rubber, polyethylene oxide, alkyl ammonium chloride, resin, methacrylate compound, coupling agent and surfactant. The anti-falling bird-repellent asphalt mixture comprises graded stone, SBS modified asphalt and the anti-falling agent. The anti-falling bird-repellent asphalt mixture is particularly suitable for paving of an airport runway, has strong anti-falling ability, prevents flight accidents caused by stone falling, has strong adaptability to high-temperature tail flow environment of an airplane, has an ecological bird-repellent function, assists in bird repelling of an airport and reduces the bird strike rate.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of petroleum industry and basic material chemistry, and particularly relates to an anti-falling agent, anti-falling bird repellent asphalt mixture and a preparation method thereof. BACKGROUND

[0002] In the aspect of bird repellent, airports usually take the method of comprehensive prevention and control such as straw man, noise, bird cannon, etc. to prevent bird damage and reduce the bird strike rate. However, due to the habituation of birds, they will develop "immunity" to the bird repellent method after a long time and cannot produce sufficient bird repellent effect. With the improvement of the natural environment, the number and types of birds gradually increase, and the activity range expands, which causes the bird strike accidents to increase year by year and increases the difficulty of airport bird repellent. Therefore, it is necessary to continuously change the bird repellent method to resist the adaptability of birds, that is, it is necessary to continuously explore new bird repellent methods to solve the problem of bird repellent habituation. Ecological bird repellent can be used as an auxiliary means of the above bird repellent method. The so-called ecological bird repellent is to use irritating substances to force insects away from the runway surface of the airport, and to cut off the food chain of birds catching insects on the runway surface, so that birds will not enter the runway surface to forage, thereby playing an ecological bird repellent role. Tests show that the addition of sulfur and other irritating substances in asphalt can achieve an ecological bird repellent effect. However, after the sulfur is used in the asphalt mixture, the sulfur is a brittle substance at room temperature, and the simple addition of the sulfur to the asphalt or the asphalt mixture will affect the adhesion of the asphalt to the stone, causing the asphalt mixture to be prone to loose or aggregate falling. In addition, the smell of sulfur will soon dissipate, losing the bird repellent effect, and the bird repellent effect is short-term, which limits its application. In addition, the addition of sulfur to asphalt can produce a large amount of harmful gas during the processing of the asphalt mixture due to heating of the asphalt, so it is necessary to reduce the harmful gas generation amount by reducing the use temperature of the asphalt. Therefore, when the asphalt containing sulfur is used, warm mixing technology needs to be adopted. How to make the asphalt runway not only have an ecological bird repellent effect and prolong the application time of the bird repellent, but also not affect the adhesion and cause the aggregate to fall off, so that the asphalt can be used at a lower temperature has become a new research topic. SUMMARY

[0003] In view of the deficiencies of the prior art, the present application provides an anti-falling agent, anti-falling bird repellent asphalt mixture and a preparation method thereof. The anti-falling agent and the anti-falling bird repellent asphalt mixture are particularly suitable for use in airport runways, which not only has a good bird repellent effect, but also significantly improves the anti-falling and aging resistance of the asphalt.

[0004] The first aspect of the present application provides an anti-falling agent, which comprises the following raw materials in mass parts:

[0005] 11-30 parts of sulfur, 4-14 parts of naphthalene series, 1-8 parts of butadiene styrene rubber, 1-8 parts of polyethylene oxide, 1-8 parts of resin, 0.3-1.2 parts of alkyl ammonium chloride, 1-8 parts of methacrylate compound, 0.3-0.9 parts of coupling agent, 0.3-0.7 parts of surfactant.

[0006] The sulfur is the sulfur produced in the process of petroleum processing, which can be in the form of block, flake or powder, and is preferably in the form of powder.

[0007] The naphthalene series is derived from at least one of coal tar and ethylene cracking tar, and has a boiling range of 210-240℃, wherein the mass content of the naphthalene series is 55-75%.

[0008] In the butadiene styrene rubber, the combined styrene mass content is 25-45wt%; preferably, the particle size of the butadiene styrene rubber is not greater than 20mm.

[0009] The molecular weight of the polyethylene oxide is 130-400 million, and is preferably 150-380 million.

[0010] The resin is selected from one or more of petroleum resin, terpene resin, rosin resin, coumarone resin, phenolic resin, polyester resin and polyamide resin.

[0011] The alkyl ammonium chloride is selected from one or more of octadecyl trimethyl ammonium chloride and hexadecyl trimethyl ammonium chloride.

[0012] The methacrylate compound is selected from one or more of 2-hydroxyethyl methacrylate, 2-ethylhexyl methacrylate and ethyl methacrylate.

[0013] The coupling agent is selected from one or more of silane coupling agent, aluminate coupling agent and titanate coupling agent.

[0014] The surfactant is selected from one or more of glycerol monostearate, sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan tristearate, sorbitan monooleate, sorbitan trioleate, polyethylene glycol monolaurate and diethylene glycol monolaurate.

[0015] The second aspect of the present application provides a preparation method of the anti-falling agent, comprising:

[0016] (1) reacting the sulfur with the naphthalene series;

[0017] (2) mixing the butadiene styrene rubber, polyethylene oxide, resin, alkyl ammonium chloride, methacrylate compound, coupling agent and surfactant with the reaction product obtained in step (1), and extruding to obtain the anti-falling agent.

[0018] In step (1), the reaction is carried out under an inert atmosphere; the inert atmosphere is at least one of nitrogen and carbon dioxide; the reaction conditions are as follows: the reaction temperature is 150-180 DEG C, the reaction pressure is 2-4 MPa, and the reaction time is 40-90 min.

[0019] In step (2), the mixing conditions include: the mixing temperature is 120-150 DEG C, and the mixing time is 50-90 min; and the extrusion temperature is 120-150 DEG C.

[0020] The third aspect of the present application provides an anti-falling bird repellent asphalt mixture, which comprises, in mass parts:

[0021] 92-96 parts of graded stones,

[0022] 4-8 parts of SBS modified asphalt,

[0023] 2-6 parts of the anti-falling agent according to the first aspect.

[0024] The graded stones are any one of graded stones of asphalt mastic mixture gradations SMA-16 and SMA-13 according to the requirements of the civil aviation system "MH5010-2017 Design Specification for Asphalt Pavement of Civil Airports".

[0025] The SBS modified asphalt is modified asphalt obtained by modifying asphalt with a styrene-butadiene-styrene block copolymer and can be prepared by a conventional method in the art. The 25 DEG C penetration of the SBS modified asphalt is 50-110 dmm. The mass content of SBS in the SBS modified asphalt is 2-5% by mass.

[0026] The fourth aspect of the present application provides a preparation method of the anti-falling bird repellent asphalt mixture, which comprises:

[0027] The anti-falling agent is added to the preheated graded stones and mixed uniformly, then the molten SBS modified asphalt is added and mixed uniformly to obtain the anti-falling bird repellent asphalt mixture.

[0028] The preheating temperature of the graded stones is 150-170 DEG C, and the heating and melting temperature of the SBS modified asphalt is 150-170 DEG C.

[0029] Further, after the anti-falling agent is added and mixed, the mixing temperature is 140-160 DEG C, and the mixing time is 40-80 seconds.

[0030] Further, after the molten SBS modified asphalt is added, the mixing temperature is 140-160 DEG C, and the mixing time is 40-80 seconds.

[0031] The mixing is generally carried out in an asphalt mixing kettle.

[0032] The anti-stripping agent of the present application is particularly suitable for paving of airport runway.

[0033] The present application has the following advantages:

[0034] 1. The sulfur and naphthalene contained in the anti-stripping agent have certain irritating odor. After mixing with styrene-butadiene rubber, polyethylene oxide, alkyl ammonium chloride, resin, methacrylate compound and surfactant, the anti-stripping agent can achieve slow release effect, and the slow-released irritating odor can force insects to stay away from the asphalt pavement and cut off the food chain of birds catching insects on the asphalt pavement, thus achieving the function of driving away birds.

[0035] 2. The anti-stripping agent of the present application uses coupling agent as initiator, and combines sulfur, naphthalene, styrene-butadiene rubber, polyethylene oxide, alkyl ammonium chloride, resin, methacrylate compound and surfactant in a kneader to form an anti-stripping agent which, when added to asphalt or mixture, can improve the anti-stripping ability, improve the adaptability to high-temperature wake environment of aircraft, and reduce the stripping of aggregate.

[0036] 3. In the preparation method of the anti-stripping agent of the present application, naphthalene is first reacted with sulfur to obtain naphthalene-sulfide, and then mixed with styrene-butadiene rubber, polyethylene oxide, alkyl ammonium chloride, resin, methacrylate compound, coupling agent and surfactant to obtain the anti-stripping agent. The components in the anti-stripping agent can improve the compatibility of the anti-stripping agent with asphalt and overcome the poor mutual solubility of sulfur when added alone. When the anti-stripping agent with bird-repelling function of the present application is mixed with stone, the naphthalene has strong polarity, and the naphthalene-sulfide obtained by reacting sulfur with naphthalene overcomes the poor adhesion between asphalt and stone when sulfur is added alone. The surfactant can reduce the friction between the molecular layers of asphalt, thereby reducing the viscosity of asphalt during use, and the surfactant, alkyl ammonium chloride and sulfur can synergistically produce warm-mixing effect. DETAILED DESCRIPTION

[0037] The technical solutions of the present application are described in detail below in combination with examples, but the present application is not limited to the following examples. In the present application, wt% is mass fraction.

[0038] In the present application, the bird-repelling effect is evaluated by the following method:

[0039] The asphalt is made into a test block with a size of 300x300x50mm. In order not to affect the normal take-off and landing of the aircraft, the test block is placed on the lawn beside the airport runway, and the placement area is 100m 2The camera is used to monitor and record the bird situation of the test area and the blank contrast area in real time. In order to evaluate the bird repelling effect, a bird situation analysis and bird repelling effect evaluation system based on BP neural network is established, and the working mode is as follows:

[0040] By recording the bird activity range and collecting bird activity images, according to the spatio-temporal characteristics and danger level of bird distribution, statistical analysis is carried out, the collected bird activity image data is uploaded to the server, and the analysis module of the server can make statistical analysis on the space and time law of bird damage; the BP neural network technology and the airport bird strike management monitoring data are used to establish an airport bird strike prediction and evaluation model. The evaluation system method can consider the effectiveness weight of different bird strike prevention methods, so as to comprehensively evaluate the bird repelling effect of the bird repelling asphalt pavement material. The BP neural network has data processing and prediction capabilities, and can predict bird strike accidents.

[0041] Example 1

[0042] The styrene-containing butadiene rubber with a content of 26wt% is crushed in advance, and the particle size is 2-11mm, which is ready for use. The kneader is heated and ready for use.

[0043] (I) Preparation of anti-falling agent

[0044] Sulfur 11.50 kg, coal tar (boiling range 210-220°C, naphthalene content 74%) 4.20 kg are added to a sealed container, heated and reacted in the presence of a protective gas to obtain a naphthalene-sulfide. The protective gas is nitrogen; the reaction temperature is 178°C, the reaction pressure is 2.2MPa, and the reaction time is 42min.

[0045] Take butadiene rubber 1.20 kg, polyethylene oxide with a molecular weight of 150,000 1.20 kg, epoxy resin 1.20 kg, octadecyl trimethyl ammonium chloride 0.32 kg, 2-hydroxyethyl methacrylate 1.20 kg, silane coupling agent 0.32 kg, glycerol monostearate 0.32 kg, and place them in a kneader to mix evenly. Add the naphthalene-sulfide prepared above while mixing, continue mixing after the naphthalene-sulfide is completely added, the temperature is 122°C, and the mixing time is 52min; then extrude, the extrusion temperature is 122°C, to obtain the anti-falling agent. The component amount of the prepared anti-falling agent is shown in Table 1.

[0046] (II) Preparation of anti-falling bird repelling asphalt mixture

[0047] Take the pre-prepared asphalt mixture SMA-13 gradation stone 92.2 kg which meets the requirements of "MH5010-2017 Design Specification for Civil Airport Asphalt Pavement" of civil aviation system, place it in a constant temperature oven and heat it to 152°C constant temperature standby; take 7.8 kg of SBS modified asphalt with 108 dmm penetration at 25°C (the mass content of SBS is 2%), place it in a constant temperature oven and heat it to 152°C constant temperature standby; take 2.2 kg of the above anti-falling agent for standby; heat the mixing kettle to 152°C standby. The component usage of the asphalt mixture is shown in Table 2, and the mixing and molding temperature of the asphalt mixture is shown in Table 5.

[0048] After the temperature of the above materials and the mixing kettle reaches the required temperature, pour the above-mentioned graded stone into the mixing kettle, add the anti-falling agent, and stir at a constant temperature of 142°C for 42 seconds, then add the SBS modified asphalt, and stir at a constant temperature of 142°C for 42 seconds, to obtain the anti-falling bird repellent asphalt mixture.

[0049] (Three) Test the anti-falling performance

[0050] Use the Los Angeles abrasion tester produced by Beijing High-speed Rail Construction Technology Development Co., Ltd. to evaluate the anti-falling performance of the anti-falling bird repellent asphalt mixture according to the Kentorbury Spatter Test method for asphalt mixture specified in "MH5010-2017 Design Specification for Civil Airport Asphalt Pavement", and the results are shown in Table 3.

[0051] (Four) The results of the airport bird repellent experiment are shown in Table 4.

[0052] Example 2

[0053] Pre-crush the butadiene-styrene rubber with a styrene content of 34wt% to a particle size of 7-15mm for standby. Heat the kneader for standby.

[0054] (One) Preparation of anti-falling agent

[0055] Add sulfur 29.00 kg and coal tar (boiling range 220-240°C, naphthalene content 56%) 13.00 kg into a sealed container, heat and melt in the presence of protective gas, and react to obtain naphthalene-sulfide. The protective gas is carbon dioxide gas; the reaction temperature is 152°C, the reaction pressure is 3.8 MPa, and the reaction time is 78 min.

[0056] Styrene-butadiene rubber 7.80 kg, polyethylene oxide with a molecular weight of 3.7 million 7.80 kg, terpene resin 7.80 kg, cetyl trimethyl ammonium chloride 1.10 kg, 2-ethylhexyl methacrylate 7.80 kg, aluminate coupling agent 0.88 kg, sorbitan monopalmitate 0.68 kg, were placed in a kneader and mixed uniformly, while mixing, the above prepared naphthalene-sulfide was added, after the naphthalene-sulfide was completely added, the mixing was continued, the temperature was 148℃, the mixing time was 88 min; then extruded, the extrusion temperature was 148℃, to obtain an anti-falling agent, the amount of anti-falling agent component used is shown in Table 1.

[0057] (II) Preparation of anti-falling bird repellent asphalt mixture

[0058] The pre-prepared asphalt mixture SMA-16 graded aggregate meeting the requirements of "MH5010-2017 Design Specification for Civil Airport Asphalt Pavement" of the civil aviation system was weighed 95.8 kg and placed in a constant temperature oven to heat to 168℃ constant temperature standby; SBS modified asphalt with a penetration of 52 dmm at 25℃ (the mass content of SBS is 5%) 4.2 kg, placed in a constant temperature oven and heated to 168℃ constant temperature standby; weigh the above anti-falling agent 5.8 kg standby; heat the mixing kettle to 168℃ standby. The amount of asphalt mixture component used is shown in Table 2, and the asphalt mixture mixing and molding temperature is shown in Table 5.

[0059] After the temperature of the above materials and the mixing kettle reaches the required temperature, pour the above graded aggregate into the mixing kettle, add the anti-falling agent, and stir at a temperature of 158℃ for 78 seconds, then add the SBS modified asphalt, and stir at a temperature of 158℃ for 78 seconds, to obtain an anti-falling bird repellent asphalt mixture.

[0060] (III) Test anti-falling performance

[0061] The Los Angeles abrasion tester produced by Beijing High-speed Rail Technology Development Co., Ltd. was used to evaluate the anti-falling performance of the anti-falling bird repellent asphalt mixture according to the Kentorbury flying test method for asphalt mixture specified in "MH5010-2017 Design Specification for Civil Airport Asphalt Pavement", and the results are shown in Table 3.

[0062] (Four) The results of the bird repellent experiment are shown in Table 4.

[0063] Example 3

[0064] The styrene-butadiene rubber with a combined styrene content of 44wt% was crushed in advance, the particle size was 9-18mm, and was standby. The kneader was heated standby.

[0065] (I) Preparation of anti-falling agent

[0066] Sulfur 20.00 kg, ethylene cracking tar (boiling range of 210-240°C, mass content of naphthalene series 65%) 9.00 kg were added into a closed container, heated and melted in the presence of a protective gas, and reacted to obtain naphthalene-sulfur compounds. The protective gas was nitrogen; the reaction temperature was 165°C, the reaction pressure was 3.0 MPa, and the reaction time was 60 min.

[0067] SBS modified asphalt (mass content of SBS 3.5%) 6 kg was weighed and placed in a constant temperature oven to be heated to 160°C for standby; the anti-falling agent 4 kg was weighed for standby; the mixing kettle was heated to 160°C for standby. The component dosage of the asphalt mixture is shown in Table 2, and the mixing and molding temperature of the asphalt mixture is shown in Table 5.

[0068] (ii) Preparation of anti-falling bird repellent asphalt mixture

[0069] The asphalt mixture SMA-16 grading stone prepared in advance to meet the requirements of the Civil Aviation System "MH5010-2017 Design Specification for Civil Airport Asphalt Pavement" was weighed at 94 kg and placed in a constant temperature oven to be heated to 160°C for standby; SBS modified asphalt (mass content of SBS 3.5%) 6 kg was weighed and placed in a constant temperature oven to be heated to 160°C for standby; the anti-falling agent 4 kg was weighed for standby; the mixing kettle was heated to 160°C for standby. The component dosage of the asphalt mixture is shown in Table 2, and the mixing and molding temperature of the asphalt mixture is shown in Table 5.

[0070] After the temperature of the above materials and the mixing kettle reached the required temperature, the above grading stone was poured into the mixing kettle, the anti-falling agent was added, and the temperature was kept at 150°C for 60 seconds, then the SBS modified asphalt was added, and the temperature was kept at 150°C for 60 seconds to obtain the anti-falling bird repellent asphalt mixture.

[0071] (III) Test the falling performance

[0072] The Los Angeles abrasion tester produced by Beijing High-speed Rail Technology Development Co., Ltd. was used to evaluate the anti-falling performance of the anti-falling bird repellent asphalt mixture according to the Kentorbury Spatter Test Method for Asphalt Mixture specified in the "MH5010-2017 Design Specification for Civil Airport Asphalt Pavement", and the results are shown in Table 3.

[0073] (iv) The results of the bird repellent experiment are shown in Table 4.

[0074] Example 4

[0075] The styrene-containing butadiene rubber with a content of 30 wt% was crushed in advance, and the particle size was 6-19 mm, ready for use. The kneader was heated and ready for use.

[0076] (I) Preparation of anti-falling agent

[0077] Sulfur 15.00 kg, ethylene cracking tar (boiling range 215-235°C, naphthalene content 60%) 8.00 kg were added to a sealed container, heated and reacted in the presence of a protective gas to obtain naphthalene-sulfide. The protective gas is carbon dioxide gas; the reaction temperature is 175°C, the reaction pressure is 3.2 MPa, and the reaction time is 55 min.

[0078] Take butadiene rubber 3.50 kg, polyethylene oxide with a molecular weight of 6.50 kg, polyamide resin 5.50 kg, cetyl trimethyl ammonium chloride 0.55 kg, ethyl methacrylate 4.00 kg, silane coupling agent 0.40 kg, sorbitol tristearate 0.40 kg, place in the kneader and mix evenly, add the naphthalene-sulfide prepared above while mixing, continue mixing after the naphthalene-sulfide is completely added, the temperature is 130°C, and the mixing time is 60 min; then extrude, the extrusion temperature is 130°C, to obtain the anti-falling agent, the preparation of anti-falling agent component dosage see table 1.

[0079] (II) Preparation of anti-falling bird repellent asphalt mixture

[0080] Take 95 kg of asphalt mixture SMA-13 graded aggregate prepared in advance according to the requirements of "MH5010-2017 Design Specification for Civil Airport Asphalt Pavement" of the civil aviation system, place it in a constant temperature oven and heat it to 155°C constant temperature ready for use; take 5 kg of SBS modified asphalt with a penetration of 90 dmm at 25°C (SBS content 4.2%) and place it in a constant temperature oven and heat it to 155°C constant temperature ready for use; take 3 kg of the above anti-falling agent ready for use; heat the mixing kettle to 155°C ready for use. The asphalt mixture component dosage is shown in Table 2, and the asphalt mixture mixing and molding temperature is shown in Table 5.

[0081] After the temperature of the above materials and the mixing kettle reaches the required temperature, pour the above graded aggregate into the mixing kettle, add the anti-falling agent, and stir at a constant temperature of 145°C for 50 seconds, then add the SBS modified asphalt, and stir at a constant temperature of 145°C for 50 seconds to obtain the anti-falling bird repellent asphalt mixture.

[0082] (III) Test anti-falling performance

[0083] The anti-stripping performance of the anti-stripping bird repellent asphalt mixture was evaluated by using the Los Angeles abrasion tester produced by Beijing High-speed Rail Construction Technology Development Co., Ltd. and the Kentaur flying test method for asphalt mixture specified in "MH5010-2017 Design Specification for Asphalt Pavement of Civil Airport". The results are shown in Table 3.

[0084] (IV) The results of the bird repellent experiment are shown in Table 4.

[0085] Comparative Example 1

[0086] The pre-prepared asphalt mastic mixture SMA-16 graded aggregate meeting the requirements of "MH5010-2017 Design Specification for Asphalt Pavement of Civil Airport" of the civil aviation system was weighed 94 kg and placed in a constant temperature oven to heat to 180°C constant temperature standby; 6 kg of SBS modified asphalt with 80 dmm penetration at 25°C (same as Example 3) was placed in a constant temperature oven and heated to 180°C constant temperature standby; the mixing pot was heated to 180°C standby.

[0087] After the temperature of the above materials and the mixing pot reached the required temperature, the above graded aggregate was poured into the mixing pot, and stirred at 175°C for 60 seconds, then the SBS modified asphalt was added, and stirred at 175°C for 60 seconds to obtain the asphalt mixture. The component usage of the asphalt mixture is shown in Table 2, and the mixing and molding temperature of the asphalt mixture is shown in Table 5.

[0088] The anti-stripping performance of the asphalt mixture was evaluated by using the Los Angeles abrasion tester produced by Beijing High-speed Rail Construction Technology Development Co., Ltd. and the Kentaur flying test method for asphalt mixture specified in "MH5010-2017 Design Specification for Asphalt Pavement of Civil Airport". The results are shown in Table 3. The results of the bird repellent experiment are shown in Table 4.

[0089] Comparative Example 2

[0090] The pre-prepared asphalt mastic mixture SMA-16 graded aggregate meeting the requirements of "MH5010-2017 Design Specification for Asphalt Pavement of Civil Airport" of the civil aviation system was weighed 94 kg and placed in a constant temperature oven to heat to 180°C constant temperature standby; 6 kg of SBS modified asphalt with 80 dmm penetration at 25°C (same as Example 3) was placed in a constant temperature oven and heated to 180°C constant temperature standby; 4.0 kg of commercial granular anti-stripping agent JW-AS1 produced by Shenzhen Jia Shengwei was weighed for standby; the mixing pot was heated to 180°C standby.

[0091] After the temperature of the above materials and the mixing pot reached the required temperature, the above graded aggregate was poured into the mixing pot, and the commercial anti-stripping agent was added, and stirred at 175°C for 60 seconds, then the SBS modified asphalt was added, and stirred at 175°C for 60 seconds to obtain the asphalt mixture. The component usage of the asphalt mixture is shown in Table 2, and the mixing and molding temperature of the asphalt mixture is shown in Table 5.

[0092] The anti-stripping performance of the asphalt mixture was evaluated by the Kentaur Spreading Test method specified in the "MH5010-2017 Design Specification for Airport Pavement Structures" using the Los Angeles abrasion tester produced by Beijing High-speed Rail Construction Technology Development Co., Ltd. The results are shown in Table 3. The bird repellent test results are shown in Table 4.

[0093] Comparative Example 3

[0094] The pre-prepared asphalt mastic mixture SMA-16 graded aggregate meeting the requirements of the "MH5010-2017 Design Specification for Airport Pavement Structures" of the civil aviation system was weighed 94 kg and placed in a constant temperature oven to heat to 170°C for standby; 6 kg of SBS modified asphalt with a penetration of 80 dmm at 25°C (same as Example 3) was placed in a constant temperature oven and heated to 170°C for standby; 1.66 kg of sulfur powder was weighed for standby; the mixing pot was heated to 170°C for standby.

[0095] After the temperature of the above materials and the mixing pot reached the required temperature, the above graded aggregate was poured into the mixing pot, sulfur powder was added, and constant temperature stirring was carried out at 165°C for 60 seconds, then SBS modified asphalt was added, and constant temperature stirring was carried out at 165°C for 60 seconds to obtain the asphalt mixture. The component usage of the asphalt mixture is shown in Table 2, and the mixing and molding temperature of the asphalt mixture is shown in Table 5.

[0096] The anti-stripping performance of the asphalt mixture was evaluated by the Kentaur Spreading Test method specified in the "MH5010-2017 Design Specification for Airport Pavement Structures" using the Los Angeles abrasion tester produced by Beijing High-speed Rail Construction Technology Development Co., Ltd. The results are shown in Table 3. The bird repellent test results are shown in Table 4.

[0097] Comparative Example 4

[0098] The pre-prepared asphalt mastic mixture SMA-16 graded aggregate meeting the requirements of the "MH5010-2017 Design Specification for Airport Pavement Structures" of the civil aviation system was weighed 94 kg and placed in a constant temperature oven to heat to 170°C for standby; 6 kg of SBS modified asphalt with a penetration of 80 dmm at 25°C (same as Example 3) was placed in a constant temperature oven and heated to 170°C for standby; 4.0 kg of commercial granular anti-stripping agent JW-AS1 produced by Shenzhen Jia Shengwei was weighed for standby; 1.66 kg of sulfur powder was weighed for standby; the mixing pot was heated to 170°C for standby.

[0099] After the temperature of the above material and the mixing pot reaches the requirement, the above graded stone is poured into the mixing pot, commercial anti-stripping agent and sulfur powder are added, constant temperature stirring is carried out at 165 DEG C for 60 seconds, then SBS modified asphalt is added, constant temperature stirring is carried out at 165 DEG C for 60 seconds, and the asphalt mixture is obtained. The component dosage of the asphalt mixture is shown in Table 2, and the mixing and molding temperature of the asphalt mixture is shown in Table 5.

[0100] The anti-stripping performance of the asphalt mixture is evaluated by using the Los Angeles abrasion tester produced by Beijing High-speed Rail Construction Technology Development Co., Ltd. according to the Kentaur flying test method for asphalt mixture in the “MH5010-2017 Design Specification for Asphalt Pavement of Civil Airport”. The results are shown in Table 3. The results of the bird repelling experiment are shown in Table 4.

[0101] Table 1 Component dosage of anti-stripping agent

[0102] Example 1 Example 2 Example 3 Example 4 Sulfur / kg 11.50 29.00 20.00 15.00 Naphthalene / kg 4.20 13.00 9.00 8.00 Styrene butadiene rubber / kg 1.20 7.80 4.50 3.50 Polyethylene oxide / kg 1.20 7.80 4.50 6.50 Resin / kg 1.20 7.80 4.50 5.50 Alkyl ammonium chloride / kg 0.32 1.10 0.75 0.55 Methacrylate compound / kg 1.20 7.80 4.50 4.00 Coupling agent / kg 0.32 0.88 0.60 0.40 Surfactant / kg 0.32 0.68 0.50 0.40

[0103] Table 2 Component dosage of anti-stripping and bird repelling asphalt mixture

[0104]

[0105]

[0106] Table 3 Results of Kentaur flying test of asphalt mixture

[0107]

[0108] *Note: MH5010-2017 Design Specification for Asphalt Pavement of Civil Airport.

[0109] In the Kentaur flying test of the asphalt mixture, the smaller the loss of the asphalt mixture, the stronger the anti-loosening and anti-stripping ability of the mixture. As can be seen from Table 3, the anti-stripping and bird repelling asphalt mixture of the present application has strong anti-stripping ability.

[0110] Table 4 Bird activity frequency in the bird repelling test area

[0111]

[0112] As can be seen from Table 4, the bird activity frequency in the test area of the anti-stripping and bird repelling asphalt mixture of the present application is significantly less than the bird activity frequency in the test area of the asphalt of the comparative examples, which indicates that the bird repelling effect of the anti-stripping and bird repelling asphalt mixture of the present application is obviously better. In Comparative Example 3 and Comparative Example 4, sulfur is added, and in the initial stage of the test, due to the presence of sulfur, there is also a certain bird repelling effect, but as time goes on, the bird repelling effect gradually weakens; while in the test area of the asphalt of the present application, with the change of seasons, there is also an increase in the bird season, but as time goes on, the bird repelling effect does not weaken obviously or even does not weaken, which indicates that the odor has a slow-release effect.

[0113] Table 5 Asphalt mixture mixing and molding temperature

[0114]

[0115] As can be seen from Table 5, after adding the anti-stripping agent of the present application, the mixing temperature of asphalt and stone and the asphalt concrete rolling molding temperature are obviously reduced, energy can be saved, the amount of harmful gas generated can be reduced, and the environment can be protected.

Claims

1. An anti-falling agent, comprising the following raw materials in mass fraction: 11-30 parts of sulfur, 4-14 parts of naphthalene series, 1-8 parts of butadiene styrene rubber, 1-8 parts of polyethylene oxide, 1-8 parts of resin, 0.3-1.2 parts of alkyl ammonium chloride, 1-8 parts of methacrylate compound, and 0.3-0.7 parts of surfactant. The naphthalene series is derived from at least one of coal tar and ethylene cracking tar, and has a boiling range of 210-240 ℃, wherein the mass content of the naphthalene series is 55-75%.

2. The anti-dropout agent according to claim 1, characterized by The butadiene styrene rubber has a combined styrene mass content of 25-45 wt%.

3. The anti-dropout agent according to claim 2, characterized by The particle size of the butadiene styrene rubber is not greater than 20 mm.

4. The anti-dropout agent according to claim 1, characterized by The molecular weight of the polyethylene oxide is 130-400 million.

5. The anti-dropout agent according to claim 4, characterized by The molecular weight of the polyethylene oxide is 150-380 million.

6. The anti-dropout agent according to claim 1, characterized by The resin is selected from one or more of petroleum resin, terpene resin, rosin resin, coumarone resin, phenolic resin, polyester resin, and polyamide resin.

7. The anti-dropout agent according to claim 1, characterized by The alkyl ammonium chloride is one or a mixture of both of octadecyl trimethyl ammonium chloride and hexadecyl trimethyl ammonium chloride.

8. The anti-dropout agent according to claim 1, characterized by The methacrylate compound is selected from one or a mixture of several of 2-hydroxyethyl methacrylate, 2-ethylhexyl methacrylate, and ethyl methacrylate.

9. The anti-dropout agent according to claim 1, characterized by The surfactant is selected from one or more of glycerol monostearate, sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan tristearate, sorbitan monooleate, sorbitan trioleate, polyethylene glycol monolaurate, and diethylene glycol monolaurate. 10.A method for preparing the anti-falling agent according to any one of claims 1-9, comprising: (1) reacting sulfur with naphthalene series; (2) mixing butadiene styrene rubber, polyethylene oxide, alkyl ammonium chloride, resin, methacrylate compound, and surfactant with the reaction product obtained in step (1), and extruding to obtain the anti-falling agent.

11. The preparation method according to claim 10, characterized in that, In step (1), the reaction is carried out in an inert atmosphere, which is at least one of nitrogen and carbon dioxide; the reaction conditions are as follows: reaction temperature 150-180 ℃, reaction pressure 2-4 MPa, and reaction time 40-80 min.

12. The preparation method according to claim 10, characterized in that, In step (2), the mixing conditions include: mixing temperature 120-150 ℃ and mixing time 50-90 min; the extrusion temperature is 120-150 ℃. 13.An anti-falling bird repellent asphalt mixture, comprising the following in mass fraction: graded aggregate 92-96 parts, SBS modified asphalt 4-8 parts, the anti-falling agent according to any one of claims 1-9 2-6 parts.

14. The anti-stripping bird-resistant asphalt mixture according to claim 13, wherein, The graded aggregate is any one of SMA-16 and SMA-13, which are asphalt mastic graded aggregates meeting the requirements of "MH5010-2017 Design Specification for Asphalt Pavement of Civil Airports".

15. The anti-stripping bird-resistant asphalt mixture according to claim 13, wherein, The SBS modified asphalt has a penetration of 50-110 dmm at 25 ℃. 16.A method for preparing the anti-falling bird repellent asphalt mixture according to any one of claims 13-15, comprising: The anti-falling agent is added into the preheated graded stone and mixed uniformly, then the heated and melted SBS modified asphalt is added and mixed uniformly, so as to obtain the anti-falling and bird-repelling asphalt mixture.

17. The preparation method according to claim 16, characterized in that, The preheating temperature of the graded stone is 150-170 DEG C, and the heating and melting temperature of the SBS modified asphalt is 150-170 DEG C.

18. The preparation method according to claim 16, characterized in that, After the anti-falling agent is added and mixed, the mixing temperature is 140-160 DEG C, and the mixing time is 40-80 seconds; after the melted SBS modified asphalt is added and mixed, the mixing temperature is 140-160 DEG C, and the mixing time is 40-80 seconds.

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