Pouring type epoxy resin modified asphalt material
By using epoxy resin modifiers and other additives, the problems of inappropriate viscosity and poor flexibility of cast asphalt concrete at high temperatures are solved, and cast asphalt materials with excellent high and low temperature performance and friendly construction environment are achieved, which are suitable for high-demand pavement fields.
Patent Information
- Application Number
- CN202211423506.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2022-11-15
- Publication Date
- 2025-08-19
AI Technical Summary
The existing cast asphalt concrete has unsuitable viscosity under high temperature conditions, which affects fluidity, poor low-temperature flexibility and fatigue resistance, insufficient high-temperature rut resistance, high mixing temperature, short application period, and serious pollution in the construction environment.
Epoxy resin is used as a modifier, combined with super tough modifier, epoxy curing agent, rheology regulator and antioxidant aging agent, to prepare cast epoxy resin modified asphalt materials. By mixing epoxy resin, curing agent and asphalt at room temperature, the mixing temperature is reduced and the high and low temperature performance and anti-aging properties of the material are improved.
It achieves good construction and ease at low temperatures, maintains high-temperature performance, reduces flue gas emissions, reduces energy consumption, improves the construction environment, and improves the comprehensive performance and durability of materials.
Smart Images
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Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of traffic engineering materials, and in particular to a cast epoxy resin modified asphalt material, a preparation method and an application thereof. Background Art
[0002] Pouring asphalt concrete refers to an asphalt mixture with a high asphalt content (7% to 15%), a high mineral powder content (20% to 30%) and a void ratio of less than 1%, which is mixed at high temperature (220℃ to 260℃) and spread and formed by relying on the mixture's own fluidity without the need for rolling.
[0003] The main advantages of poured asphalt concrete are: (1) It is almost void-free and impermeable. The paved asphalt concrete can protect the safety of the bridge structure while preventing the combined effects of light, oxygen, water, heat, etc., ensuring durability; (2) The discharge and insulation temperature of the mixture is as high as 220℃~260℃, and there are no special requirements for the environmental conditions on site. At the same time, it does not require rolling and has good construction performance; (3) It has a high asphalt content (almost twice that of ordinary asphalt mixture), good low-temperature flexibility, excellent resistance to fatigue cracking and durability, and high vehicle driving comfort.
[0004] Despite this, poured asphalt concrete faces numerous difficult technical challenges. First, the viscosity of modified asphalt cannot be too high under high temperature conditions (220-260°C), otherwise it will affect the fluidity of the mixture, requiring an increase in mixing temperature or the amount of modified asphalt used, ultimately affecting the overall performance of the mixture. Second, traditionally, to prevent excessive shear failure and permanent deformation in the surface layer, modified asphalt requires high viscosity and stiffness under high temperature conditions, which completely contradicts the first point. Third, to ensure the mixture has good low-temperature flexibility and fatigue cracking resistance, modified asphalt must have good flowability under low temperature conditions, which contradicts the second point. Fourth, the mixture is mixed under high temperature conditions (220-260°C) for 2-6 hours, requiring the modified asphalt to have excellent anti-aging properties. However, high-temperature anti-aging properties are inversely proportional to the duration of high temperature, creating a contradiction. Furthermore, mixing under high temperature conditions releases large amounts of waste gases (such as carbon dioxide, sulfides, and nitrogen oxides), which seriously affect the health of construction workers. Fifth, the high-temperature performance of poured asphalt concrete, such as dynamic stability, is generally low, typically less than 2,000 times / mm, or even as low as 300-500 times / mm. This performance decreases dramatically with rising temperatures. Considering the combined effects of current traffic growth, overloading, and persistent high temperatures, pavement surfaces are prone to rutting, uneven surface finish, and poor skid resistance, reducing their service life and completely failing to meet practical application requirements. Fifth, high temperatures generally shorten the pot life of reactive systems, leading to demanding construction conditions and high scrap rates. Finally, compared to conventional thermoplastic polymer-modified asphalt (e.g., styrene-based (SBS, SIS, SEBS, SEPS), olefin-based (TPO, TPV), diene-based (TPB, TPI), vinyl chloride-based (TPVC, TCPE), urethane-based (TPU), ester-based (TPEE), amide-based (TPAE), organofluorine-based (TPF), silicone-based, and vinyl-based) cast concrete), two-component reactive epoxy resins offer excellent high-temperature performance but poor low-temperature performance. However, the addition of conventional thermoplastic polymers should be limited, as this will severely affect the fluidity of the system and cause construction difficulties. Furthermore, due to the low addition amount, their high-temperature performance is severely insufficient. These factors contribute to the difficulties in the development of cast asphalt concrete. Therefore, the research and development of modified asphalt materials based on cast asphalt concrete that offer low mixing temperatures, high strength, resistance to rutting, fatigue cracking, and aging has become a major concern for industry professionals. Summary of the Invention
[0005] In response to the shortcomings and deficiencies of poured asphalt concrete in the prior art, the embodiments of the present application provide a poured epoxy resin modified asphalt material, a preparation method and a use method, thereby solving the technical problems of poured asphalt concrete in the prior art, such as poor low-temperature fatigue cracking resistance, insufficient high-temperature rutting resistance, high mixing temperature, short applicability, and poor anti-aging performance. This achieves the goal of ensuring both construction workability and good comprehensive performance of poured asphalt mixtures under low mixing temperature construction; low mixing temperature reduces the aging of asphalt mixtures, while reducing smoke and saving energy, greatly improving the working environment during the construction of poured asphalt mixtures; high thermal storage stability, and high temperature is not prone to segregation and crusting; simple operation, low production cost, energy saving and environmental protection, suitable for promotion and application; and has outstanding high and low temperature performance and durability and weather resistance.
[0006] In order to achieve the above technical objectives, the technical solutions of the present invention are as follows: A castable epoxy resin modified asphalt material comprises component A and component B in a mass ratio of 100:40-180, wherein, in parts by weight, component A comprises: 100 parts of epoxy resin and 5-35 parts of a super-tough modifier; component B comprises: 100 parts of an epoxy curing agent, 5-45 parts of a rheology modifier, and 1-8 parts of an antioxidant. The super-tough modifier in component A is obtained by reacting a monofunctional or difunctional epoxy diluent with one or more appropriate combinations of difunctional acids, amines, thiols, isocyanates, and alcohol molecules; the epoxy curing agent in component B is an amine curing agent; and the rheology modifier in component B is an asphalt extender. Preparation method of component A: Heat the epoxy resin and super tough modifier of component A to 60-100℃ respectively, mix them evenly according to the above proportions, test and package them to obtain component A; Preparation method of component B: Heat the epoxy curing agent, rheology modifier and antioxidant of component B to 40-70°C respectively, mix them evenly according to the above proportions, test and package to obtain component B; Usage: At room temperature, according to a certain oil-stone ratio, a certain mass of component A, component B and asphalt are simultaneously put into a mixing pot filled with hot aggregate and stirred evenly to obtain cast epoxy resin modified asphalt concrete, which can be spread on the road surface; the mass ratio of the sum of the components A and B to the asphalt is 100:100~1000.
[0007] Preferably, a cast epoxy resin modified asphalt material comprises a component A and a component B in a mass ratio of 100:50-150, wherein, in parts by weight, the component A comprises: 100 parts of epoxy resin and 5-25 parts of super-tough modifier; the component B comprises: 100 parts of epoxy curing agent, 10-35 parts of rheology regulator and 2-6.5 parts of antioxidant; the super-tough modifier in the component A is a monofunctional or difunctional epoxy diluent and a difunctional epoxy diluent. The epoxy curing agent is obtained by reacting one or more appropriate combinations of acid, amine, thiol, isocyanate, and alcohol molecules, and the functionality molar ratio of the epoxy diluent to the difunctional acid, amine, thiol, isocyanate, and alcohol molecules is 1: (0.7-0.9); the epoxy curing agent in component B is an amine curing agent or an acid curing agent; the rheology modifier in component B also includes a viscosity modifier, and the asphalt extender and the viscosity modifier can be mixed in any proportion; Preparation method of component A: Heat the epoxy resin and super tough modifier of component A to 60°C respectively, mix them evenly according to the above proportions, test and package to obtain component A; Preparation method of component B: Heat the epoxy curing agent, rheology modifier and antioxidant of component B to 60°C respectively, mix them evenly according to the above proportions, test and package to obtain component B; Usage: At room temperature, according to the oil-stone ratio of 6% to 15%, a certain mass of component A, component B and asphalt are simultaneously put into a mixing pot filled with hot aggregate and stirred evenly to obtain cast epoxy resin modified asphalt concrete, which can be spread on the road surface; the mass ratio of the sum of the components A and B to the asphalt is 100:100~600.
[0008] Preferably, the epoxy resin of component A is specifically a bisphenol A epoxy resin; the bisphenol A epoxy resin has an epoxy value of 0.31, 0.35, 0.42, 0.44, 0.51, 0.54 or a combination thereof.
[0009] Preferably, the monofunctional epoxy diluent specifically includes one or more combinations of C4~C20 alkyl glycidyl ether, cardanol glycidyl ether, methacrylate glycidyl ether, tertiary carboxylic acid glycidyl ester, and p-tert-butylphenyl glycidyl ether; the difunctional epoxy diluent specifically includes one or more combinations of polypropylene glycol diglycidyl ether, butanediol diglycidyl ether, pentaerythritol diglycidyl ether, ERR-0300, ERL-4201, ERL-4289, ERISYS® GS 120, EPALLOY® 7200, EPALLOY® 5000, and ADK EP-4000.
[0010] Preferably, difunctional acids, amines, thiols, isocyanates, alcohol molecules; more specifically, the acids include: one or a combination of long-chain dibasic acids, phthalic anhydride, maleic anhydride, methylhexahydrophthalic anhydride, hexahydrophthalic anhydride; the amines include: SURFONAMINE® B-200, SURFONAMINE® L-100, SURFONAMINE® L-200, SURFONAMINE® L-207, SURFONAMINE® L-300, aniline, adipic acid dihydrazide, C4~C10 fatty primary amine or secondary amine, one or more combinations thereof; the thiols specifically include: one or more combinations thereof of JLY-121, JLY-124, JLY-1225, JLY-115, JLY-215, LP-2, LP-3, LP-23, and LP-31; the isocyanates specifically include: one or more combinations thereof of toluene diisocyanate, diphenylmethane diisocyanate, and isophorone diisocyanate; when the reaction activity of the alcohols is low, a special catalyst such as triphenylphosphine, tetraphenylphosphine bromide, ethyltriphenylphosphine acetate, ethyltriphenylphosphine bromide, and ethyltriphenylphosphine chloride may be added; the alcohols specifically include: one or more combinations thereof of PEG-200, PEG-400, PEG-600, PEG-800, and PEG1000.
[0011] Further preferably, the monofunctional or difunctional epoxy diluent is obtained by reacting one or more appropriate combinations of difunctional acids, amines, thiols, isocyanates, and alcohol molecules at a molar ratio of 1:0.7-0.85.
[0012] Preferably, the epoxy curing agent is an amine curing agent or an acid curing agent; the amine curing agent specifically includes one or more combinations of polyetheramine M-600, M-1000, M-2005, M-2070, D-400, D-2000, T5000, SURFONAMINE® B-60, SURFONAMINE® B-100, C12~C24 fatty primary or secondary amines, coconut amine, oleylamine, ethylenediamine, Gaskamine328, and C10~C20 amine polyoxyethylene ether; the number of ethylene oxide (EO) in the C10~C20 amine polyoxyethylene ether is 3~18; the acid curing agent specifically includes one or more combinations of dodecenyl succinic anhydride, methyl nadic anhydride, polyazelaic anhydride, tung oil anhydride, C8~C9 olefin succinic anhydride, polysebacic anhydride, and polyeicosane diacid anhydride. It should be noted that difunctional acids and amine molecules can also be used as epoxy resin curing agents.
[0013] Preferably, the rheological agent is a viscosity modifier and an asphalt extender; the viscosity modifier is one or a combination of phthalates, aliphatic dibasic acid esters, fatty acid esters, benzene polyesters, and alkyl sulfonates; the asphalt extender is one or a combination of cyclohexane oil, furfural extracted oil, waste diesel, waste vegetable oil, waste engine oil, waste crude oil, waste vacuum pump oil, waste gear oil, waste hydraulic oil, waste heat treatment oil, and waste transformer oil.
[0014] Preferably, the antioxidant is a mixture of a resin antioxidant and an asphalt antioxidant in any proportion; the resin antioxidant is any one of antioxidant 1010, butylated hydroxytoluene, and tris[2,4-di-tert-butylphenyl]phosphite; the asphalt antioxidant is one or a combination of 2-hydroxy-4-n-octyloxybenzophenone, butylated hydroxyanisole, and antioxidant 1726.
[0015] A method for preparing a cast epoxy resin modified asphalt material and its application, comprising the following steps: (1) Preparation of component A super-tough modifier: add monofunctional or difunctional epoxy diluent to a reactor at a temperature of 60-150°C and introduce nitrogen. Then slowly drop the difunctional molecule into the reactor at a molar ratio of 1:0.7-0.9 and continue the reaction for 60-300 minutes to obtain the super-tough modifier. (2) Preparation method of component A: Heat the epoxy resin and super tough modifier to 60~100℃ respectively, add them into the reactor in batches according to the ratio and mix and stir at constant temperature for 30~60 minutes, test and package to obtain component A; (3) Preparation of component B: Heat the epoxy curing agent, rheology modifier, and antioxidant to 40-70°C respectively, add them into the reactor in batches according to the ratio, mix and stir at a constant temperature for 30-60 minutes, test, and package to obtain component B; Instructions for use: At room temperature, according to an oil-stone ratio of 7-15%, a certain mass of component A, component B, and asphalt are simultaneously put into a mixing pot filled with 120-300°C hot aggregate and stirred evenly. This is the cast epoxy resin modified asphalt concrete, which can be spread on the road surface. It can be widely used in high-requirement road paving fields such as large-span steel bridge decks, tunnels, highways, airports, etc.
[0016] Compared with the existing technology, this technical solution has at least the following technical advantages: 1. Due to the use of a reactive resin system, that is, epoxy resin as a modifier for cast asphalt materials, it has excellent rutting resistance and good low-temperature flexibility. It can also provide corresponding operating time according to different requirements (the pot life is long and adjustable). At the same time, it is environmentally friendly and can be adjusted to meet different performance requirements. It has excellent fatigue resistance and weathering resistance. It maintains excellent high-temperature performance while also ensuring excellent low-temperature performance, resulting in excellent overall performance.
[0017] 2. The present invention reduces the mixing temperature and reduces the aging of asphalt mixture. At the same time, it can reduce smoke and save energy, which greatly improves the working environment during the construction of pouring asphalt mixture.
[0018] 3. The castable epoxy resin-modified asphalt material of the present invention has high thermal storage stability and is not prone to segregation and crusting at high temperatures. It is also simple to operate, low in production cost, energy-efficient and environmentally friendly, making it suitable for widespread application.
[0019] 4. The pourable epoxy resin-modified asphalt material of this invention is simpler to use. The epoxy, curing agent, and asphalt are simply added to the mixing kettle. Compared with conventional methods (where the epoxy and curing agent are heated separately, the epoxy resin and curing agent are then mixed uniformly and added simultaneously with the asphalt), this method significantly reduces mixture production time and ensures a continuous supply of the mixture.
[0020] 5. The castable epoxy resin-modified asphalt material of this invention is suitable for demanding applications such as long-span steel bridge decks, tunnels, highways, and airports. It can also be used in urban arterial roads, bus stops, and intersections. It can also be used as a waterproofing material, sealant, adhesive, or vibration and noise reduction material for high-speed railways. DETAILED DESCRIPTION
[0021] To better understand the above technical solution, the above technical solution will be described and illustrated in detail below in conjunction with specific implementation methods. Once those skilled in the art understand the basic inventive concept, they may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention, or if such changes and modifications fall within the scope of the claims of the present invention and their equivalents, then the present invention also includes such changes and modifications, that is, they all fall within the scope of protection of this application.
[0022] In the following examples, if specific conditions are not specified, conventional conditions or manufacturer-recommended conditions were followed, such as those in JTG / T 3364-02-2019, "Technical Specification for Design and Construction of Highway Steel Bridge Deck Pavements," and JTGE20-2011, "Test Procedure for Asphalt and Asphalt Mixtures in Highway Engineering." Reagents and instruments used without manufacturer's indication are commercially available.
[0023] Example 1 This embodiment provides a castable epoxy resin modified asphalt material, the preparation method of which is as follows: (1) Preparation of component A super-tough modifier: add monofunctional or difunctional epoxy diluent (propylene glycol diglycidyl ether, p-tert-butylphenyl glycidyl ether, C12-14 glycidyl ether in a molar ratio of 0.3:0.35:0.35) to a reactor heated to 145°C, then slowly add difunctional molecule (SURFONAMINE® L-100) to the reactor and continue the reaction for 60 minutes, wherein the molar ratio of diluent to difunctional compound molecule functionality is 1:0.73, thus obtaining super-tough modifier; (2) Preparation method of component A: Heat the epoxy resin (epoxy values 0.42 and 0.54 mixed at a molar ratio of 1:1) and the super-tough modifier (see the above step (1)) of component A to 60°C, add them into the reactor at a mass ratio of 100:24.1 and mix them, stir at a constant temperature for 30 minutes, test and package to obtain component A; (3) Preparation of component B: Prepare the epoxy curing agent (SURFONAMINE® B-100, C 18 Fatty secondary amine, C 16 Amine polyoxyethylene ether (EO) (the quantity is 6, mixed in a molar ratio of 0.45:0.3:0.25), rheology regulator (diethyl phthalate and naphthenic oil KN4016 are mixed in a molar ratio of 1:2), and antioxidant aging agent (butylated hydroxyanisole and antioxidant 1010 are mixed in a molar ratio of 1:1) are added into a reactor heated to 60°C in a mass ratio of 100:17.4:2.5 and mixed. The mixture is stirred at a constant temperature for 30 minutes, tested, and packaged to obtain component B.
[0024] Example 2 This embodiment provides a castable epoxy resin modified asphalt material, the preparation method of which is as follows: (1) Preparation of super tough modifier component A: Monofunctional or difunctional epoxy diluent (EPALLOY ® 7200 and cardanol glycidyl ether (mixed in a molar ratio of 0.7:0.3) were added to a reactor heated to 110°C. Then, bifunctional compound molecules (decylamine, hexadecylamine, and SURFONAMINE® L-300 (mixed in a molar ratio of 0.25:0.3:0.45) were slowly added to the reactor for continuous reaction. The molar ratio of diluent to bifunctional compound molecules was 1:0.8. This yielded the super-tough modifier. (2) Preparation method of component A: Heat the epoxy resin of component A (epoxy value 0.51, epoxy value 0.54 in a molar ratio of 0.6:0.4) and the super flexible diluent (see the above step (1)) to 60°C, add them into the reactor in a mass ratio of 100:7.9 and mix them, stir at a constant temperature for 45 minutes, test and package to obtain component A; (3) Preparation method of component B: add the epoxy curing agent of component B (polyetheramine M-2005, C16 fatty primary amine in a molar ratio of 0.25:0.75, mix evenly), rheology regulator (dioctyl phthalate, furfural extracted oil in a mass ratio of 0.35:0.65, mix evenly), antioxidant aging agent (tris[2,4-di-tert-butylphenyl]phosphite, 2-hydroxy-4-n-octyloxybenzophenone in a molar ratio of 0:65:0.35, mix evenly), add them into a 60℃ reactor in a mass ratio of 100:30:5.5, mix, stir at a constant temperature for 35 minutes, test and package, and obtain component B.
[0025] Example 3 This embodiment provides a castable epoxy resin modified asphalt material, the preparation method of which is as follows: (1) Preparation of super tough modifier component A: Monofunctional or difunctional epoxy diluent (C 12 ~C 14 Glycidyl ether, ERL-4289, ERISYS ® GS 120 (mixed evenly in a molar ratio of 0.31:0.21:0.48) was added to a reactor heated to 100°C, and then bifunctional compound molecules (liquid polythiol LP-2 and JLY-215 mixed evenly in a molar ratio of 0.5:0.5) were slowly added to the reactor for continuous reaction. The molar ratio of diluent to bifunctional compound molecules was 1:0.77. This yielded the super-tough modifier. (2) Preparation method of component A: Component A epoxy resin (epoxy value 0.51, epoxy value 0.35, epoxy value 0.42 are mixed in a molar ratio of 0.4:0.33:0.27) and super tough modifier (see the above step (1)) are heated to 85 ° C, added into the reactor in a mass ratio of 100:18.2 and mixed, stirred at a constant temperature for 60 minutes, tested and packaged to obtain component A; (3) Preparation method of component B: add the epoxy curing agent of component B (polyeicosane diacid anhydride, dodecane dicarboxylic acid, tung oil anhydride mixed at a molar ratio of 0.5:0.35:0.15), rheology regulator (diisooctyl sebacate, waste diesel oil, waste vegetable oil mixed at a mass ratio of 0.4:0.35:0.25), anti-aging agent (antioxidant 1010, dibutyl hydroxytoluene mixed at a molar ratio of 0.5:0.5) into a 60°C reactor at a mass ratio of 100:33.8:4.6 and mix, stir at a constant temperature for 40 minutes, test and package to obtain component B.
[0026] Example 4 This embodiment provides a castable epoxy resin modified asphalt material, the preparation method of which is as follows: (1) Preparation of component A super-tough modifier: add monofunctional or difunctional epoxy diluent (methacrylate glycidyl ether) to a reactor heated to 95°C, then slowly drop difunctional molecules (diphenylmethane diisocyanate and liquid polythiol LP-31 mixed in a molar ratio of 0.5:0.49) into the reactor for continuous reaction, wherein the molar ratio of diluent to difunctional compound molecules is 1:0.83; thus, the super-tough modifier is obtained; (2) Preparation method of component A: add the epoxy resin of component A (epoxy value 0.31, epoxy value 0.54 according to the molar ratio of 0.2:0.8) and the super tough modifier (see the above step (1)) in a mass ratio of 100:6.8 into a reactor heated to 60°C and mix them, stir at a constant temperature for 55 minutes, test and package to obtain component A; (3) Preparation of component B: Add the epoxy curing agent (octadecylamine, C 18 Amine polyoxyethylene 1805 is added into a reactor heated to 60°C in a molar ratio of 0.65:0.35, a rheology regulator (di(2-ethylhexyl) sebacate, cyclohexane oil KN4010, and waste vegetable oil are mixed in a mass ratio of 0.2:0.45:0.35), and an antioxidant (2-hydroxy-4-n-octyloxybenzophenone) is added in a mass ratio of 100:13.2:3 respectively and mixed. The mixture is stirred at a constant temperature for 40 minutes, tested, and packaged to obtain component B.
[0027] Example 5 This embodiment provides a castable epoxy resin modified asphalt material, the preparation method of which is as follows: (1) Preparation of super tough modifier component A: Monofunctional or difunctional epoxy diluent (C 18Alkyl glycidyl ether and ERR-0300 (mixed evenly at a molar ratio of 0.38:0.62) were added to a reactor heated to 90°C, and then bifunctional compound molecules (PEG200, PEG-600, PEG1000 at a molar ratio of 0.25:0.35:0.4) were slowly dripped into the reactor for continuous reaction, wherein the molar ratio of diluent to bifunctional compound molecules was 1:0.79; thus, a super-tough modifier was obtained; (2) Preparation method of component A: add the epoxy resin of component A (epoxy value 0.32, epoxy value 0.44, epoxy value 0.54 according to the molar ratio of 0.1:0.36:0.64) and the super tough modifier (see the above step (1)) into a reactor heated to 60°C at a mass ratio of 100:23.5 and mix them. Stir at constant temperature for 45 minutes, test and package to obtain component A. (3) Preparation method of component B: add the epoxy curing agent (methyl nadic anhydride and polyeicosane diacid anhydride) of component B into a reactor heated to 60°C in a mass ratio of 100:18.5:2.7 respectively and mix them. Stir at a constant temperature for 30 minutes, test and package to obtain component B.
[0028] Example 6 Same as Example 1, except that: Preparation method of component B: Add component B epoxy curing agent (SURFONAMINE® L-207, polyetheramine M-2070, and tetradecylamine, mixed at a molar ratio of 0.15:0.23:0.62), rheology modifier (PriEco 8002 benzene polyester and naphthenic oil KN4006, mixed at a molar ratio of 0.39:0.61), and antioxidant (butylated hydroxyanisole) at a mass ratio of 100:17.4:5.8 to a reactor heated to 60°C and mix. Stir at constant temperature for 30 minutes, test, and package to obtain component B.
[0029] Example 7 Same as Example 2, except that: Preparation of super tough modifier component A: monofunctional or difunctional epoxy diluent (EPALLOY ®5000, ERR-0300, and glycidyl methacrylate (mixed evenly in a molar ratio of 0.2:0.43:0.37) were added to a reactor heated to 140°C. Then, difunctional compound molecules (octadecylamine, SURFONAMINE® L-200, and octadecyl secondary amine (mixed in a molar ratio of 0.36:0.29:0.35) were slowly added to the reactor for continuous reaction. The molar ratio of diluent to difunctional compound molecules was 1:0.83, resulting in a super-tough modifier.
[0030] Example 8 Same as Example 3, except that: ERISYS ® GS 120 was replaced with ADKEP-4000; the epoxy value of 0.35 was replaced with 0.44; polyeicosane diacid anhydride was replaced with octadecane dicarboxylic acid, and the mass ratio of component B was 100:13.8:3.1.
[0031] The epoxy resin modified asphalt materials prepared in Examples 1, 2, 3, 4, 5, 6, 7, and 8 and commercially available high-performance polymer cast asphalt (control group) were used to prepare cast epoxy resin modified asphalt concrete. The specific method of use is as follows: At room temperature, a predetermined mass of Component A, Component B, and asphalt was added to a mixing kettle filled with hot aggregate at 120-300°C at a 7%-15% asphalt-to-stone ratio and stirred evenly. This produced a castable epoxy resin-modified asphalt concrete. The mass ratio of the sum of Component A and Component B to asphalt was 100:100-600. Test specimens were then formed and subjected to various tests. The castable epoxy resin-modified asphalt material of the present invention is widely applicable to demanding road paving applications such as long-span steel bridge decks, tunnels, highways, and airports. The test results are shown in Tables 1 and 2 below.
[0032] Table 1 Molding conditions of specimens of Examples 1 to 8 Table 2 Performance of cast epoxy resin modified asphalt concrete in Examples 1 to 8 Note: The applicable period is the time required for the Brookfield rotation viscosity to rise to 1000mPa.s at different temperatures.
[0033] The curing agent used in the present invention is a monofunctional curing agent, which reacts with the epoxy resin in the early stage of mixing to form a three-dimensional cured network with a low crosslinking density, thereby ensuring that the epoxy resin material is in a state of slowly increasing viscosity within 2 hours before mixing: on the other hand, after the epoxy resin material is mixed with low-viscosity hot asphalt in different mass ratios, the latter has a strong dilution effect on the former, thereby further ensuring that the viscosity of the cast epoxy resin modified asphalt material before mixing still meets the mixing requirements of the mixture. At the same time, due to the long-term high temperature state during pouring construction, the light components of the asphalt volatilize, resulting in a shortened application period and severe aging. The present invention cleverly designs an asphalt extender, which effectively avoids the volatilization of light components caused by high temperature. At the same time, the provision of an antioxidant aging agent also compensates for the high-temperature aging and oxidation effects of the resin and asphalt. In addition, the super-tough modifier compensates for the traditional influence of the poor low-temperature performance of reactive resins.
[0034] As shown in the test data in Tables 1 and 2, the castable epoxy resin-modified asphalt material prepared by the present invention can be applied over a wide temperature range, with pressure-free application possible at mixing temperatures from 110°C to 200°C. It has a pot life of at least 70 minutes, and even exhibits a viscosity below 1 Pa.s within the tested temperature range. By lowering the mixing temperature of the mixture, the aging properties of the asphalt or polymer material are significantly improved, while also reducing energy waste and improving the working environment for construction workers.
[0035] From the mixture performance results in Table 2, it can be seen that due to the use of a reactive resin system, that is, using epoxy resin as a modifier for cast asphalt materials, it has excellent anti-rutting performance and can meet different construction requirements. It also has good low-temperature flexibility and room-temperature fatigue resistance. At the same time, it is environmentally friendly and suitable for high-requirement occasions such as large-span steel bridge decks, tunnels, highways, airports, etc. It can also be used in urban arterial roads, bus stops and intersections, and can also be used as a waterproof material, sealant, adhesive or shock-absorbing and noise-reducing material for high-speed railways.
Claims
1. A cast epoxy resin modified asphalt material, characterized in that: The invention comprises component A and component B in a mass ratio of 100:40-180, wherein, in parts by weight, the component A comprises: 100 parts of epoxy resin and 5-35 parts of super-tough modifier; the component B comprises: 100 parts of epoxy curing agent, 5-45 parts of rheology regulator and 1-8 parts of antioxidant. The super-tough modifier in component A is obtained by reacting a monofunctional or difunctional epoxy diluent with one or more appropriate combinations of difunctional acids, amines, thiols, isocyanates, and alcohol molecules; The epoxy curing agent in the B component is an amine curing agent; The rheology modifier in the B component is an asphalt extender; Preparation method of component A: Heat the epoxy resin and super tough modifier of component A to 60-100℃ respectively, mix them evenly according to the above proportions, test and package them to obtain component A; Preparation method of component B: Heat the epoxy curing agent, rheology modifier and antioxidant of component B to 40-70°C respectively, mix them evenly according to the above proportions, test and package them to obtain component B; Usage: At room temperature, according to a certain asphalt-stone ratio, add a certain mass of component A, component B, and asphalt into a mixing pot filled with hot aggregate and mix them evenly to obtain pouring epoxy resin modified asphalt concrete, which can be spread on the road surface. The mass ratio of the sum of the A component and the B component to the asphalt is 100:100-1000.
2. A castable epoxy resin modified asphalt material according to claim 1, characterized in that: The invention comprises component A and component B in a mass ratio of 100:50-150, wherein, in parts by weight, the component A comprises: 100 parts of epoxy resin and 5-25 parts of super-tough modifier; the component B comprises: 100 parts of epoxy curing agent, 10-35 parts of rheology regulator and 2-6.5 parts of antioxidant. The super-tough modifier in component A is obtained by reacting a monofunctional or difunctional epoxy diluent with one or more appropriate combinations of difunctional acids, amines, thiols, isocyanates, and alcohol molecules, and the functionality molar ratio of the epoxy diluent to the difunctional acids, amines, thiols, isocyanates, and alcohol molecules is 1:(0.7-0.9); The epoxy curing agent of component B is an amine curing agent or an acid curing agent; The rheology modifier in the B component also includes a viscosity modifier, and the asphalt extender and the viscosity modifier can be mixed in any proportion; Preparation method of component A: Heat the epoxy resin and super tough modifier of component A to 60°C respectively, mix them evenly according to the above proportions, test and package them to obtain component A; Preparation method of component B: Heat the epoxy curing agent, rheology modifier and antioxidant of component B to 60°C respectively, mix them evenly according to the above proportions, test and package them to obtain component B; Usage: At room temperature, add a certain amount of component A, component B, and asphalt into a mixing pot filled with hot aggregate at a ratio of 6% to 15% of oil to stone. Stir evenly to obtain pourable epoxy resin modified asphalt concrete, which can be spread on the road surface. The asphalt is petroleum asphalt, and the mass ratio of the sum of component A and component B to asphalt is 100:100-600.
3. The cast epoxy resin modified asphalt material according to claim 1 or 2, characterized in that: The epoxy resin of component A is preferably one or more bisphenol A epoxy resins with epoxy values of 0.31, 0.35, 0.42, 0.44, 0.51, or 0.
54.
4. The cast epoxy resin modified asphalt material according to claim 1 or 2, characterized in that: The monofunctional epoxy diluent is preferably C4~C 20 One or more appropriate combinations of alkyl glycidyl ether, cardanol glycidyl ether, and methacrylic acid glycidyl ether; the bifunctional epoxy diluent is preferably propylene glycol diglycidyl ether, butanediol diglycidyl ether, pentaerythritol diglycidyl ether, ERR-0300, ERL-4201, ERL-4289, ERISYS ® GS120, EPALLOY ® 7200、EPALLOY ® 5000, ADKEP-4000 or a combination of them.
5. The cast epoxy resin modified asphalt material according to claim 1 or 2, characterized in that: The bifunctional acids, amines, thiols, isocyanates, and alcohol molecules, more specifically, the acids are preferably one or a combination of long-chain dibasic acids; the amines are preferably C4~C 10 Fatty primary or secondary amines, one or more combinations of SURFONAMINE® B-200, SURFONAMINE® L-100, SURFONAMINE® L-200, SURFONAMINE® L-207, and SURFONAMINE® L-300; the thiols are preferably one or more combinations of JLY-121, JLY-124, JLY-1225, JLY-115, JLY-215, LP-2, LP-3, LP-23, and LP-31; the isocyanates are preferably one or more combinations of toluene diisocyanate, diphenylmethane diisocyanate, and isophorone diisocyanate; the alcohols are preferably one or more combinations of PEG-200, PEG-400, PEG-600, PEG-800, and PEG1000.
6. The cast epoxy resin modified asphalt material according to any one of claims 1, 2, 4 and 5, characterized in that: The monofunctional or difunctional epoxy diluent is obtained by reacting one or several appropriate combinations of difunctional acids, amines, thiols, isocyanates and alcohol molecules at a molar ratio of 1:0.7-0.
85.
7. The cast epoxy resin modified asphalt material according to claim 1 or 2, characterized in that: The amine curing agent is preferably polyetheramine M-600, M-1000, M-2005, M-2070, D-400, D-2000, T5000, SURFONAMINE® B-60, SURFONAMINE® B-100, C 12 ~C 24 Fatty primary or secondary amines, Gaskamine 328, C 10 ~C 20 One or more combinations of amine polyoxyethylene ethers, C 10 ~C 20 The number of ethylene oxide (EO) groups in the amine polyoxyethylene ether is 3 to 18; the acid curing agent is preferably one or a combination of dodecenyl succinic anhydride, methyl nadic anhydride, polyazelaic anhydride, tung oil anhydride, C8 to C9 olefin succinic anhydride, polysebacic anhydride, and polyeicosane diacid anhydride.
8. The cast epoxy resin modified asphalt material according to claim 1, characterized in that: The viscosity regulator is one or a combination of phthalates, aliphatic dibasic acid esters, fatty acid esters, benzene polyesters, and alkyl sulfonates; the asphalt extender is one or a combination of cyclohexane oil, furfural extracted oil, waste diesel oil, and waste vegetable oil.
9. The cast epoxy resin modified asphalt material according to claim 1, characterized in that: The antioxidant is a mixture of a resin antioxidant and an asphalt antioxidant in any proportion; the resin antioxidant is any one of antioxidant 1010 and butylated hydroxytoluene; the asphalt antioxidant is one or a combination of 2-hydroxy-4-octyloxybenzophenone, butylated hydroxyanisole, and antioxidant 1726.
10. A method for preparing a cast epoxy resin modified asphalt material according to any one of claims 1 to 9 and its application, characterized in that: The following steps are involved: (1) Preparation of component A super-tough modifier: add monofunctional or difunctional epoxy diluent to a reactor at a temperature of 60-150°C and introduce nitrogen. Then slowly drop the difunctional molecule into the reactor at a molar ratio of 1:0.7-0.9 and continue the reaction for 60-300 minutes to obtain the super-tough modifier. (2) Preparation method of component A: Heat the epoxy resin and super tough modifier to 60~100℃ respectively, add them into the reactor in batches according to the ratio and mix and stir at constant temperature for 30~60 minutes, test and package to obtain component A; (3) Preparation of component B: Heat the epoxy curing agent, rheology modifier, and antioxidant to 40-70°C respectively, add them into the reactor in batches according to the ratio, mix and stir at a constant temperature for 30-60 minutes, test, and package to obtain component B; Instructions for use: At room temperature, according to an oil-stone ratio of 7-15%, a certain mass of component A, component B, and asphalt are simultaneously put into a mixing pot filled with 120-300°C hot aggregate and stirred evenly. This is the cast epoxy resin modified asphalt concrete, which can be spread on the road surface. It can be widely used in high-requirement road paving fields such as large-span steel bridge decks, tunnels, highways, airports, etc.