Composite asphalt warm-mixing agent, preparation method and application and asphalt, asphalt mixture

Abstract

The application discloses a composite asphalt warm-mixing agent, a preparation method and application thereof, and asphalt and asphalt mixture, wherein the warm-mixing agent comprises long-chain hydrocarbon compounds, amphoteric ionic surfactants, non-ionic surfactants and a catalyst; the long-chain hydrocarbon compounds comprise at least one of plant / animal wax, petroleum wax and synthetic wax; the amphoteric ionic surfactants have at least two hydrocarbon chains, one cation and one anion, and contain unsaturated double bonds in the chain segments; and the non-ionic surfactants are ethoxylated surfactants and / or hydroxylated surfactants. The unsaturated double bonds in the amphoteric ionic surfactants are added and polymerized with the long-chain hydrocarbon compounds, and then the non-ionic surfactants are compounded, so that a single-component composite warm-mixing agent with multiple properties is prepared for the first time, and the cohesive property of the asphalt can be effectively improved, and the high-temperature and low-temperature properties and water damage resistance of the asphalt and the mixture are significantly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of asphalt mixing, in particular to a composite warm asphalt agent, a preparation method and application thereof, and asphalt and asphalt mixture. BACKGROUND

[0002] Warm mix asphalt (WMA) technology originated in Europe in the 1990s, and its processing temperature is between that of hot mix asphalt (150-180℃) and cold mix asphalt (10-40℃), and its performance is similar to that of hot mix asphalt. The reduced mixing, paving and compaction temperature of warm mix asphalt not only reduces the energy consumption in the production process of asphalt mixture, but also reduces the emission of harmful gases and dust, and at the same time, it has basically the same road performance and construction workability as hot mix asphalt, which meets the strategy of green road construction and low-carbon environmental protection development in China.

[0003] At present, WMA can be divided into three categories according to the mechanism: 1) foaming type, 2) surfactant type, and 3) organic viscosity reduction type. The first foaming type warm agent sprays micro water bubbles into the molten asphalt, forms a lubricating structure on the surface of the asphalt, reduces the viscosity of the asphalt, and thus achieves the effect of warm mixing; the second surfactant type warm agent forms a large number of structural water films inside the asphalt to act as a lubricating structure, reduces the cohesion of the asphalt, and thus enhances the flowability of the asphalt mixture at a lower temperature, achieving the effect of warm mixing. The most typical product is warm agent Zytel. After the addition of the warm agent, the compaction of the asphalt mixture test piece is improved, the void ratio is reduced, the risk of rutting of the mixture is reduced, the modulus of resilience is improved, and at the same time, the adhesion between the asphalt and the aggregate is also improved, and the low-temperature performance is less affected; the third organic viscosity reduction type warm agent can separate the originally closely acting asphalt macromolecules from each other after melting, form a lubricating effect inside the asphalt, reduce the cohesion of the asphalt, and thus enhance the flowability of the asphalt chain segment at high temperature, achieving the purpose of reducing the viscous flow temperature. The most typical product is Sasobit. After the addition of Sasobit, the risk of rutting of the asphalt mixture is reduced, and the modulus of resilience of the asphalt mixture is slightly affected.

[0004] However, each warm agent with different mechanisms has defects, such as the first foaming type warm agent, if the water amount is too large, not only a large amount of water vapor will be produced to cause boiling and equipment corrosion, which brings inconvenience to production, and the remaining water will also change the properties of the asphalt; if the water amount is too small, the foaming effect will be poor and the viscosity reduction effect will be poor; at the same time, the foaming type warm asphalt needs special foaming equipment, which is expensive and has general prospects for promotion; the second surfactant type warm agent can reduce the processing temperature of the asphalt mixture by 30-50℃, but the imported Warm mix agent can reduce the softening point of asphalt, resulting in more rutting disease of asphalt mixture; at the same time, it is expensive and not suitable for large-scale application; the third kind of organic viscosity-reducing warm mix agent significantly reduces the penetration and 10℃ ductility of asphalt, making asphalt brittle and hard, and reducing the maximum bending strain of asphalt mixture; at the same time, most organic viscosity-reducing agents reduce the adhesion between asphalt and aggregate due to their low surface energy characteristics, which easily leads to the reduction of water resistance; in addition, although Sasobit has a lower price than Sasol, the price is still high and not suitable for large-scale use in China.

[0005] It is a difficult problem to be solved urgently to invent a warm mix agent which can realize warm mix, does not affect the high and low temperature performance of asphalt and asphalt mixture, and has low cost, stable performance and simple preparation method. However, there are few studies on this problem at present. The only solution is to physically mix organic viscosity-reducing agent with cationic surfactant and / or other additives, although the obtained products can reduce the mixing temperature of mixture, but due to the poor compatibility between components, the influence on the cohesion of asphalt is still great, resulting in different degrees of reduction of the performance of asphalt and mixture.

[0006] ​CN103204644A discloses a warm mix asphalt modifier, which is composed of the following raw materials in parts by weight: amide substance 60-90 parts, aromatic oil 10-35 parts, asphalt binder 2-5 parts; the preparation method thereof is as follows: 1) heating the amide substance to make it into liquid state; 2) heating the aromatic oil to make it into liquid or fluid state; 3) mixing and stirring the substances obtained in steps 1) and 2) uniformly to obtain a mixture a; 4) adding the asphalt binder to the mixture a obtained in step 3) and stirring uniformly to obtain a mixture b; 5) granulating the mixture b obtained in step 4) after cooling to viscous state, drying at normal temperature, then crushing, passing through a 20-mesh sieve, and taking the undersize to obtain the warm mix asphalt modifier. The amide wax in the present application is one or both of ethylene bis-oleic acid amide and erucic acid amide, which plays a role in high-temperature viscosity reduction and lubrication; the binder is one or several of dimethylaminopropylamine, N-aminoethylpiperazine, diethylenetriamine, triethylenetetramine and tetraethylenepentamine, which is an amine cationic surfactant, and which improves the adhesion of asphalt and stone or eliminates the adverse effect of the amide substance on the adhesion of asphalt and stone. However, the method only physically mixes the binder and the amide wax without chemical reaction, so that segregation is easily caused, the cohesion of asphalt is affected, and then the low-temperature ductility of asphalt and the adhesion to stone are affected; meanwhile, the warm mix agent does not have universality, needs to be adjusted according to different types of asphalt, is not suitable for large-scale promotion; in addition, the binder has a high heating temperature in use, a large amount of toxic steam is generated, the smell is bad, the environment is affected, and the health of the operator is damaged.

[0007] Therefore, it has become a difficulty in the development of warm mix asphalt to develop a warm mix agent which has simple process, can reduce the high-temperature viscosity of asphalt, does not affect or even improves the high-temperature and low-temperature performance, and has sufficient chemical action between components to avoid segregation. SUMMARY

[0008] In order to solve the above technical problems, the present application provides a composite warm mix asphalt agent, a preparation method and application thereof, and asphalt and asphalt mixture, the composite warm mix asphalt agent is prepared by addition polymerization of long-chain hydrocarbon compound and the unsaturated double bond in zwitterionic surfactant, and compounding with non-ionic surfactant, a single-component composite warm mix agent with multiple properties is prepared for the first time, which effectively improves the cohesion of asphalt, and significantly improves the high and low temperature performance and water resistance of asphalt and mixture.

[0009] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0010] A composite warm mix asphalt agent, comprising long-chain hydrocarbon compound, zwitterionic surfactant, non-ionic surfactant and catalyst.

[0011] The long-chain hydrocarbon compound component in the present application includes at least one of plant / animal wax, petroleum wax and synthetic wax; the plant / animal wax includes at least one of carnauba wax, ouricury wax and beeswax; the petroleum wax includes at least one of montan wax, paraffin wax and microcrystalline wax; the synthetic wax includes at least one of polyethylene wax, polypropylene wax, modified montan wax, fatty acid amide wax and Fischer-Tropsch wax.

[0012] The zwitterionic surfactant in the present application has at least two hydrocarbon chains, one cationic functional group and one anionic functional group, and contains unsaturated double bonds in the chain segment. In some specific embodiments, the zwitterionic surfactant is at least one of a reaction product of tall oil acid and a polyalkylene polyamine reactant, a complex of a reaction product of tall oil acid and a polyethylene polyamine with a dimer of C18-unsaturated acid and tall oil acid, a reaction product of tall oil acid and linseed oil acid dimer, a tallow-based dihydroxyethyl betaine, an N-hydrogenated tallow-based propylene diamine acetate, an isobutenyl amide propyl trimethyl ammonium methyl sulfate, a bis-tallow-based dimethyl ammonium alkyl sulfate, and an N-tallow alkyl trimethylene diamine ethoxylate.

[0013] The non-ionic surfactant in the present application is an ethoxylated surfactant and / or a hydroxylated surfactant. In some specific embodiments, the non-ionic surfactant is at least one of a cetyl alcohol polyether-1, a polyethylene glycol and its derivatives, a polyvinyl alcohol, an alcohol ethoxylate, a fatty alcohol polyoxyethylene ether, a fatty acid methyl ester ethoxylate, a fatty amine ethoxylate, a copolymer of propylene oxide and ethylene oxide, and a polyglycerol ester.

[0014] The catalyst in the present application is at least one of dibenzoyl peroxide, isopropylbenzene peroxide, dicumyl peroxide, benzoyl peroxide tert-butyl ester, methyl ethyl ketone peroxide, azobis isobutyronitrile, azobis isohexyl nitrile, and dimethyl azobis isobutyrate.

[0015] The composite warm asphalt modifier of the present application utilizes the addition polymerization reaction of the unsaturated double bonds of the zwitterionic surfactant and the long-chain hydrocarbon compound under heating and catalysis to produce a new long-chain alkane-zwitterionic surfactant intermediate. The ionic part of the intermediate can be combined with the non-ionic surfactant by hydrogen bond / dipole interaction, reducing the phase separation between the components of the warm modifier. The long-chain part also interacts with the asphalt components, improving the compatibility of the warm modifier with the asphalt and reducing the occurrence of segregation.

[0016] Preferably, the long-chain hydrocarbon compound accounts for 40%-90% of the composite warm asphalt modifier by weight; further preferably 50%-80%.

[0017] Preferably, the weight percentage of the amphoteric surfactant in the complex asphalt warm agent is 5-30%, and further preferably 10-20%.

[0018] Preferably, the weight percentage of the non-ionic surfactant in the complex asphalt warm agent is 5-30%, and further preferably 10-20%.

[0019] Preferably, the weight percentage of the catalyst in the complex asphalt warm agent is 0.1-1%.

[0020] The complex asphalt warm agent can be added with other additives such as aromatic oil and anti-aging agent in a weight percentage of 0.1-9% according to actual application needs without affecting the performance of the complex asphalt warm agent.

[0021] The application also provides a preparation method of the complex asphalt warm agent.

[0022] S1, adding a formula amount of amphoteric surfactant and catalyst into the long-chain hydrocarbon compound after melting, heating and stirring to obtain an intermediate;

[0023] S2, adding a formula amount of non-ionic surfactant into the intermediate obtained in step S1, heating and stirring, and cooling to obtain the complex asphalt warm agent.

[0024] Preferably, the heating and stirring in step S1 is stirring at 70-110℃ for 60-120min.

[0025] Preferably, the heating and stirring in step S2 is stirring at 70-110℃ for 30-60min, and then continuing to stir and cool to 40-50℃.

[0026] Preferably, the cooling in step S2 is standing cooling to room temperature.

[0027] The application also provides an application of the complex asphalt warm agent in asphalt and asphalt mixture.

[0028] Preferably, the addition amount of the complex asphalt warm agent is 1-10% of the weight of the asphalt, and further preferably 1-5%, and most preferably 3%.

[0029] The application also provides an asphalt comprising the complex asphalt warm agent.

[0030] Preferably, the asphalt is base asphalt and / or SBS modified asphalt.

[0031] The application also provides a preparation method of the asphalt, comprising mixing the complex asphalt warm agent and the asphalt and stirring uniformly.

[0032] Preferably, the temperature of the stirring is 100-120℃, and the time of the stirring is 15-30min.

[0033] The application also provides an asphalt mixture comprising the composite warm mix asphalt additive.

[0034] Preferably, the asphalt is base asphalt and / or SBS modified asphalt.

[0035] The application also provides the application of the above-mentioned asphalt and / or asphalt mixture in engineering construction.

[0036] The application has the following advantages:

[0037] 1) The addition polymerization reaction of the zwitterionic surfactant and the unsaturated double bond of the long-chain hydrocarbon compound occurs under heating and catalytic conditions to prepare a new long-chain alkane-zwitterionic surfactant intermediate. The ionic part of the intermediate can be combined with the non-ionic surfactant component by hydrogen bond / dipole interaction to reduce the phase separation between the components of the warm mix additive. The long-chain part also interacts with the asphalt component to improve the compatibility of the warm mix additive with the asphalt and reduce the occurrence of segregation.

[0038] 2) The prepared warm mix additive has the functions of the components and improves the shortcomings of the components: the alkane branches of the prepared warm mix additive reduce the viscosity of the asphalt, improve the flowability of the asphalt at the mixing and compaction temperature, and reduce the surface tension of the asphalt at the mixing temperature, while the ionic chain segment increases the cohesive energy of the asphalt and the wrapping capacity of the asphalt, thereby improving the cohesive force of the asphalt and the adhesion to the mineral aggregate, so that the asphalt can better resist moisture damage.

[0039] 3) The obtained warm mix additive is solid at room temperature, changes into a viscous state when heated, and changes into a liquid state when the temperature exceeds the melting point. Therefore, the molten liquid warm mix additive has good flow performance at the mixing and compaction time, can penetrate into the asphalt to mix uniformly with the asphalt, and reduces the viscosity of the asphalt, thereby reducing the mixing temperature of the asphalt to achieve the effect of warm mixing. After the temperature is reduced, the original crystal structure of the long-chain hydrocarbon branch is destroyed by the ionic chain segment to form a microcrystalline structure, thereby reducing the influence on various properties of the asphalt. At low temperature, the non-ionic surfactant component of the warm mix additive can play the effect of antifreeze to improve the low-temperature ductility of the asphalt.

[0040] 4) The obtained warm mix additive not only reduces the rotary viscosity of the asphalt at 135℃ by >30%, but also reduces the mixing temperature of the asphalt mixture by 20-30℃, and improves the softening point of the asphalt, the low-temperature ductility of the asphalt, the adhesion of the asphalt to the aggregate, and the air void ratio and rutting risk of the mixture. At the same time, the warm mix additive of the application can achieve the purpose of warm mixing of various asphalts such as base asphalt and modified asphalt.

[0041] 5) The prepared warm mix agent is solid at room temperature, used as a single composite warm mix agent, easy to add, transport and store, and conducive to large-scale promotion.

[0042] 6) The obtained warm mix agent is suitable for various asphalts, has universality, and also has the advantages of good stability, high temperature resistance, simple preparation method, low production cost, and simple use method. DETAILED DESCRIPTION

[0043] The advantages and effects of the present application can be easily understood by those skilled in the art from the disclosure of the present specification. The present application can also be implemented or applied by different specific embodiments, and various modifications or changes can be made to the details in the specification without departing from the spirit of the present application.

[0044] Before further describing the specific embodiments of the present application, it should be understood that the scope of protection of the present application is not limited to the following specific embodiments; it should also be understood that the terms used in the embodiments are for the purpose of describing the specific embodiments, and are not intended to limit the scope of protection of the present application.

[0045] When the embodiments give numerical ranges, it should be understood that, unless otherwise specified by the present application, each numerical range has two endpoints and any number between the two endpoints can be selected. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as generally understood by those skilled in the art to which the present application belongs.

[0046] The present application does not limit the source of the raw materials used, and unless otherwise specified, the raw materials used in the present application are all commercially available in the technical field.

[0047] Example 1: Composite asphalt warm mix agent and warm mix asphalt

[0048] 70 parts of Fischer-Tropsch wax were placed in a reaction vessel, heated to a molten state at 100°C, then 10 parts of a complex of a reaction product of a zwitterionic surfactant, a reaction product of tall oil acid and polyethylene polyamine, and a dimer of C18-unsaturated acid and tall oil acid (CAS 68910-91-8), and 0.5 parts of azobisisobutyronitrile were added, and stirring was continued at 100°C for 90 min, to obtain an intermediate; the temperature was lowered to 80°C, 10 parts of a non-ionic surfactant, polyethylene glycol, was added to the intermediate, and constant temperature stirring was continued for 40 min, heating was stopped, and stirring was stopped after cooling to 50°C, and after cooling to room temperature, a composite warm mix agent was obtained. The component ratio is shown in Table 1.

[0049] The warm agent of this example was weighed 3 parts, added to 97 parts of 70# asphalt with a temperature of 120°C, stirred for 30 min, to obtain the warm asphalt (number WB-1) of the application. The warm effect is shown in Table 2.

[0050] Example 2 Compound type asphalt warm agent and warm asphalt

[0051] 80 parts of microcrystalline wax were placed in a reaction vessel, heated to a molten state at 80°C, then 5 parts of zwitterionic surfactant N-tallow alkyl trimethylene diamine ethoxylate and 0.5 parts of azobisisobutyronitrile were added, and stirring was continued at 80°C for 90 min to obtain an intermediate; the temperature was kept at 100°C, 5 parts of non-ionic surfactant cetyl alcohol polyether-1 were added to the intermediate, and stirring was continued for 40 min, heating was stopped, and stirring was cooled to 50°C, then stirring was stopped, and after cooling to room temperature, the compound type warm agent was obtained. The component allocation ratio is shown in Table 1.

[0052] The warm agent of this example was weighed 3 parts, added to 97 parts of 70# asphalt with a temperature of 120°C, stirred for 30 min, to obtain the warm asphalt (number WB-2) of the application. The warm effect is shown in Table 2.

[0053] Example 3 Compound type asphalt warm agent and warm asphalt

[0054] 60 parts of polyethylene wax were placed in a reaction vessel, heated to a molten state at 110°C, then 19 parts of zwitterionic surfactant tall oil acid and linoleic acid dimer (CAS 68910-85-0) and 1 part of azobisisobutyronitrile were added, and stirring was continued at 110°C for 120 min to obtain an intermediate; the temperature was kept at 80°C, 20 parts of non-ionic surfactant polyvinyl alcohol were added to the intermediate, and stirring was continued for 30 min, heating was stopped, and stirring was cooled to 50°C, then stirring was stopped, and after cooling to room temperature, the compound type warm agent was obtained. The component allocation ratio is shown in Table 1.

[0055] The warm agent of this example was weighed 3 parts, added to 97 parts of 70# asphalt with a temperature of 120°C, stirred for 30 min, to obtain the warm asphalt (number WB-3) of the application. The warm effect is shown in Table 2.

[0056] Example 4 Compound type asphalt warm agent and warm asphalt

[0057] Take 50 parts of montan wax into a reaction vessel, after heating to a molten state at 90°C, add 20 parts of zwitterionic surfactant N-hydrogenated tallow propylene diamine acetate and 0.8 parts of azobis isobutyronitrile, continue to stir at 90°C for 120 min to obtain an intermediate; keep the temperature at 80°C, add 20 parts of non-ionic surfactant polyglycerol ester to the intermediate, continue to stir for 30 min, stop heating, and after stirring to cool to 50°C, stop stirring, and after cooling to room temperature, the composite warm mix agent is obtained. The component allocation ratio is shown in Table 1.

[0058] Take 3 parts of the warm mix agent of the present example, add to 97 parts of 70# asphalt with a temperature of 120°C, stir for 30 min to obtain warm mix asphalt (No. WB-4). The warm mix effect is shown in Table 2.

[0059] Example 5 Composite asphalt warm mix agent and warm mix asphalt

[0060] Take 50 parts of microcrystalline wax into a reaction vessel, after heating to a molten state at 70°C, add 20 parts of zwitterionic surfactant tallow dihydroxyethyl betaine (CAS 70750-46-8) and 0.5 parts of azobis isobutyronitrile, continue to stir at 70°C for 90 min to obtain an intermediate; after reducing the temperature to 80°C, add 30 parts of non-ionic surfactant copolymer of propylene oxide and ethylene oxide to the intermediate, continue to stir at constant temperature for 40 min, stop heating, and after stirring to cool to 50°C, stop stirring, and after cooling to room temperature, the composite warm mix agent is obtained. The component allocation ratio is shown in Table 1.

[0061] Take 3 parts of the warm mix agent of the present example, add to 97 parts of SBS I-C modified asphalt with a temperature of 150°C, stir for 30 min to obtain modified warm mix asphalt (No. WB-5). The warm mix effect is shown in Table 2.

[0062] Example 6 Composite asphalt warm mix agent and warm mix asphalt

[0063] Take 30 parts of Brazil palm wax into a reaction vessel, after heating to a molten state at 100°C, add 20 parts of zwitterionic surfactant isobutenyl amide propyl trimethyl ammonium methyl sulfate (CAS 51441-65-7) and 0.2 parts of dibenzoyl peroxide, continue to stir at 100°C for 90 min to obtain an intermediate; after reducing the temperature to 80°C, add 20 parts of non-ionic surfactant alcohol ethoxylate to the intermediate, continue to stir at constant temperature for 40 min, stop heating, and after stirring to cool to 50°C, stop stirring, and after cooling to room temperature, the composite warm mix agent is obtained. The component allocation ratio is shown in Table 1.

[0064] The warm agent of this example was weighed 3 parts, added to 97 parts of SBS I-D modified asphalt with a temperature of 150°C, stirred for 30 min, and modified warm asphalt (number WB-6) was obtained. The warm effect is shown in Table 2.

[0065] Example 7 Composite type asphalt warm agent and warm asphalt

[0066] 40 parts of montan wax was placed in a reaction vessel, after heating to a molten state at 100°C, 30 parts of zwitterionic surfactant N-tallow alkyl trimethylene diamine ethoxylate and 1 part of azobisdimethyl isobutyrate were added, and stirring was continued at 100°C for 90 min to obtain an intermediate; after reducing the temperature to 80°C, 29 parts of non-ionic surfactant fatty acid methyl ester ethoxylate was added to the intermediate, and constant temperature stirring was continued for 40 min, heating was stopped, and stirring was stopped after cooling to 50°C, and after cooling to room temperature, the composite type warm agent was obtained. The component ratio is shown in Table 1.

[0067] The warm agent of this example was weighed 3 parts, added to 97 parts of SBS I-D modified asphalt with a temperature of 150°C, stirred for 30 min, and modified warm asphalt (number WB-6) was obtained. The warm effect is shown in Table 2.

[0068] Table 1 Warm agent formula of examples 1-7 of the present application

[0069]

[0070]

[0071] Comparative example 1 Composite type asphalt warm agent and warm asphalt

[0072] The difference between this comparative example and example 1 is that the zwitterionic surfactant is replaced by dimethyl aminopropyl amine.

[0073] The warm agent of this example was weighed 3 parts, added to 97 parts of SBS I-D modified asphalt with a temperature of 150°C, stirred for 30 min, and modified warm asphalt (number WB-6) was obtained. The warm effect is shown in Table 2.

[0074] Comparative example 2 Composite type asphalt warm agent and warm asphalt

[0075] The difference between this comparative example and example 1 is that the non-ionic surfactant is replaced by tetraethylene pentamine.

[0076] The warm agent of this example was weighed 3 parts, added to 97 parts of SBS I-D modified asphalt with a temperature of 150°C, stirred for 30 min, and modified warm asphalt (number WB-6) was obtained. The warm effect is shown in Table 2.

[0077] Comparative Example 3 Composite warm-mix asphalt agent and warm-mix asphalt

[0078] The difference between the present comparative example and Example 1 is that the long-chain hydrocarbon compound is 19.9 wt%, the zwitterionic surfactant is 40 wt%, the non-ionic surfactant is 40 wt%, and the catalyst is 0.1 wt%.

[0079] The present comparative example is a viscous semi-solid (No. DB-3) due to the low content of long-chain hydrocarbon compound, and cannot form a solid during preparation, as shown in Table 2.

[0080] Table 2. Test results of warm-mix asphalt performance

[0081]

[0082]

[0083] In summary, the unsaturated double bonds in the long-chain hydrocarbon compound and the unsaturated double bonds of the surfactant component undergo addition copolymerization under catalysis to generate a novel composite warm-mix agent. The warm-mix agent can avoid phase separation with asphalt, improve the cohesion of warm-mix asphalt, and improve the storage stability of warm-mix asphalt, while also having the advantages of both organic viscosity-reducing warm-mix agents and surfactant-type warm-mix agents. Not only can the warm-mix agent improve the high-temperature and low-temperature performance of asphalt, reduce the mixing temperature of asphalt mixture, but also can improve the anti-stripping performance and water damage resistance of asphalt and stone. At the same time, the present warm-mix agent can reduce the viscosity of various asphalts such as base asphalt and modified asphalt to achieve the purpose of warm-mixing. In addition, the present warm-mix agent also has the advantages of easy collection of raw materials, stable performance, simple preparation method, and low production cost.

[0084] The above is a further description of the present application in combination with specific examples, but these examples are merely exemplary and do not constitute any limitation on the scope of the present application. Those skilled in the art should understand that the details and forms of the technical solutions of the present application can be modified or replaced without deviating from the spirit and scope of the present application, and such modifications and replacements all fall within the protection scope of the present application.

Claims

1. A compound asphalt warm mix agent, characterized by, comprising long-chain hydrocarbon compounds 40%-90%, zwitterionic surfactants 5%-30%, non-ionic surfactants 5%-30% and catalysts 0.1%-1% by 100% weight percentage; the long-chain hydrocarbon compounds comprise at least one of montan wax, vegetable wax, animal wax, petroleum wax and synthetic wax; the zwitterionic surfactants are at least one of a reaction product of tall oil acid and a polyalkylene polyamine reactant, a complex of a reaction product of tall oil acid and a polyethylene polyamine with a dimer of C18-unsaturated acid and tall oil acid, a reaction product of tall oil acid and a linseed oil acid dimer, a tallow-based dihydroxyethyl betaine, an N-hydrogenated tallow-based propylene diamine acetate, an isobutenyl amide propyl trimethyl ammonium methyl sulfate, a bis-tallow-based dimethyl ammonium alkyl sulfate, and an N-tallow alkyl trimethylene diamine ethoxylate; the non-ionic surfactants are ethoxylated surfactants and / or hydroxyl-containing surfactants; the catalysts are at least one of dibenzoyl peroxide, isopropyl benzene peroxide, dicumyl peroxide, benzoyl peroxide tert-butyl ester, methyl ethyl ketone peroxide, azobis isobutyronitrile, azobis isohexyl nitrile and dimethyl azobis isobutyrate; the preparation method of the complex asphalt warm-mixing agent comprises the following steps: S1, adding formula amount of zwitterionic surfactants and catalysts to the long-chain hydrocarbon compounds after melting, heating and stirring to obtain an intermediate; S2, adding formula amount of non-ionic surfactants to the intermediate obtained in step S1, heating and stirring, and cooling to obtain the complex asphalt warm-mixing agent.

2. The complex pitch warm mix agent according to claim 1, characterized in that, the vegetable wax comprises at least one of carnauba wax and small crown coconut wax; the animal wax comprises beeswax; the petroleum wax comprises at least one of paraffin wax and microcrystalline wax; and the synthetic wax comprises at least one of polyethylene wax, polypropylene wax, modified montan wax, fatty acid amide wax and Fischer-Tropsch wax.

3. The complex pitch warm mix agent according to claim 1, characterized in that, the non-ionic surfactants are polyethers.

4. The complex pitch warm mix agent according to claim 1, characterized in that, the non-ionic surfactants are cetyl alcohol polyether-1.

5. The complex pitch warm mix agent according to claim 1, characterized in that, the non-ionic surfactants are polyethylene glycol and derivatives thereof.

6. The complex pitch warm mix agent according to claim 1, characterized in that, the non-ionic surfactants are polyvinyl alcohol.

7. The complex pitch warm mix agent according to claim 1, characterized in that, the non-ionic surfactants are alcohol ethoxylates.

8. The complex pitch warm mix agent according to claim 1, characterized in that, the non-ionic surfactants are fatty alcohol polyoxyethylene ethers.

9. The complex pitch warm mix agent according to claim 1, characterized in that, the non-ionic surfactants are fatty acid methyl ester ethoxylates.

10. The complex asphalt warm mix agent of claim 1, wherein the non-ionic surfactants are fatty amine ethoxylates.

11. The complex pitch warm mix agent according to claim 1, characterized in that, the non-ionic surfactants are copolymers of propylene oxide and ethylene oxide.

12. The complex asphalt warm mix agent of claim 1, wherein the non-ionic surfactants are polyglycerol esters.

13. The method of producing a complex asphalt warm mix agent according to any one of claims 1 to 12, characterized in that, comprising the following steps: S1, adding formula amount of zwitterionic surfactants and catalysts to the long-chain hydrocarbon compounds after melting, heating and stirring to obtain an intermediate; S2, adding formula amount of non-ionic surfactants to the intermediate obtained in step S1, heating and stirring, and cooling to obtain the complex asphalt warm-mixing agent.

14. The method of claim 13, wherein, the heating and stirring in step S1 is stirring at 70-110°C for 60-120 min; and the heating and stirring in step S2 is stirring at 70-110°C for 30-60 min, and then continuing to stir and cool to 40-50°C.

15. Use of the complex asphalt warm-mix agent of any one of claims 1-12 in the preparation of asphalt and asphalt mixture.

16. The use according to claim 15, characterized in that, The addition amount of the complex asphalt warm-mix agent is 1%-10% by weight of the asphalt.

17. An asphalt characterized in that, The complex asphalt warm-mix agent of any one of claims 1-12.

18. An asphalt mixture characterized in that, The complex asphalt warm-mix agent of any one of claims 1-12.

19. Use of the asphalt of claim 17 in engineering construction.

20. Use of the asphalt mixture of claim 18 in engineering construction.

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