High-viscosity and high-elasticity emulsified asphalt, preparation and application thereof, sand-containing fog seal material and application of sand-containing fog seal material

Abstract

The invention provides high-viscosity high-elasticity emulsified asphalt and preparation and application thereof, and a sand-containing fog seal material and application thereof, and belongs to the technical field of building materials. The high-viscosity and high-elasticity emulsified asphalt disclosed by the invention can be used for enhancing the skid resistance of a pavement, improving the flexibility of the pavement and improving the adhesive property of the pavement, and is excellent in waterproof performance, capable of reducing noise and high in ageing resistance; the high-viscosity and high-elasticity emulsified asphalt has excellent bonding performance, the bonding strength is 2-3 times higher than that of common emulsified asphalt, and the high-viscosity and high-elasticity emulsified asphalt is particularly suitable for a sand-containing fog seal layer, an ultrathin wearing layer and the like.

Description

Technical Field

[0001] This invention relates to the field of building materials technology, and in particular to a high-viscosity, high-elasticity emulsified asphalt and its preparation and application, and a sand-containing fog seal material and its application. Background Technology

[0002] Asphalt pavement is the main structural form of road surface. With increasing traffic volume, the development of heavy-load traffic, and the complexity and diversity of service conditions and climatic conditions, higher requirements are placed on the performance of asphalt mixtures and binders.

[0003] High-viscosity, high-elasticity modified asphalt refers to asphalt with a dynamic viscosity (60℃) greater than 20,000 Pa*s, achieved through the addition of high-viscosity, high-elasticity modifiers or physical modification. Compared to ordinary modified asphalt, high-viscosity asphalt typically exhibits higher viscosity, higher viscosity-toughness, and a higher softening point. Therefore, high-viscosity, high-elasticity modified asphalt is primarily used in open-graded asphalt mixtures (OGFCs), and is also widely applied in road wearing courses and sand-containing fog seal layers.

[0004] However, existing high viscoelastic modified asphalt has problems such as insufficient anti-aging properties, poor high-temperature storage stability, insufficient viscosity and toughness, and poor workability, which affect construction efficiency and quality. Summary of the Invention

[0005] The purpose of this invention is to provide a high-viscosity, high-elasticity emulsified asphalt and its preparation and application, as well as a sand-containing fog seal material and its application, which can improve the anti-aging and storage stability of high-viscosity, high-elasticity modified asphalt, enhance its viscosity and toughness, and thus improve the service life of the pavement.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solution:

[0007] This invention provides a high-viscosity, high-elasticity emulsified asphalt, comprising the following components by weight: 100-150 parts base asphalt, 3-7 parts SBS rubber, 25-35 parts solubilizer, 1-5 parts stabilizer, 4-8 parts high-viscosity modifier, 1-5 parts emulsifier, and 90-110 parts water.

[0008] The high viscoelastic modifier includes petroleum resin, natural rubber, or acrylate polymer.

[0009] Preferably, the SBS rubber is linear; the solubilizer includes light oil, vegetable oil, or coal tar.

[0010] Preferably, the stabilizer includes sulfide stabilizers, organic polymer stabilizers, or compound stabilizers.

[0011] Preferably, the emulsifier includes one or more of sodium dodecyl diphenyl ether disulfonate, sodium dodecyl sulfate, and sodium dodecylbenzene sulfonate.

[0012] This invention provides a method for preparing the high-viscosity, high-elasticity emulsified asphalt described in the above technical solution, comprising the following steps:

[0013] Modified asphalt is obtained by heating and swelling base asphalt, SBS rubber, and solubilizer.

[0014] After the modified asphalt is heated and sheared, a stabilizer is added and shearing is continued. The resulting asphalt product undergoes a first thermal development to obtain SBS modified asphalt.

[0015] The SBS modified asphalt was heated and mixed with a high viscoelastic modifier, and then subjected to a second thermal development to obtain composite modified asphalt.

[0016] The composite modified asphalt was mixed with emulsifier and water, and then ground to obtain high-viscosity and high-elasticity emulsified asphalt.

[0017] Preferably, the heating and swelling temperature is 160–175°C, and the time is 20–30 min; the heating and shearing temperature is 175–185°C, the shearing rate is 5000–6000 rad / min, and the shearing time is 25–30 min; the first thermal development temperature is 165–175°C, and the time is 25–35 min; the heating and mixing temperature is 175–185°C; and the second thermal development temperature is 165–180°C, and the time is 25–35 min.

[0018] This invention provides the application of the high-viscosity, high-elasticity emulsified asphalt described in the above-described technical solution or the high-viscosity, high-elasticity emulsified asphalt prepared by the above-described technical solution in sealing materials.

[0019] This invention provides a high-viscosity, high-elasticity sand-containing fog seal material, comprising the following components by mass: 90-120 parts of high-viscosity, high-elasticity emulsified asphalt and 30-50 parts of aggregate; wherein the high-viscosity, high-elasticity emulsified asphalt is the high-viscosity, high-elasticity emulsified asphalt described in the above technical solution or the high-viscosity, high-elasticity emulsified asphalt prepared by the preparation method described in the above technical solution.

[0020] Preferably, the aggregate includes one or more of corundum, basalt sand and quartz sand.

[0021] This invention provides the application of the high-viscosity, high-elasticity sand-containing fog seal material described in the above technical solution in road maintenance.

[0022] This invention provides a high-viscosity, high-elasticity emulsified asphalt. SBS rubber significantly improves the high and low temperature performance and durability of asphalt, and also resists aging, delays asphalt oxidative hardening, and extends pavement life. A solubilizer promotes the melting of SBS rubber in the base asphalt. A stabilizer improves the thermal stability of the high-viscosity, high-elasticity modified asphalt, solving the problem of storage segregation. The high-viscosity, high-elasticity modifier has better adhesion properties, enhancing the bond between asphalt and aggregates and improving the overall performance of the modified asphalt. An emulsifier enables the oil and water phases to mix uniformly to form a stable emulsion, effectively reducing the surface tension at the oil-water interface. Through the added components, the anti-aging properties, storage stability, and viscosity-toughness of the high-viscosity, high-elasticity emulsified asphalt can be improved.

[0023] The high-viscosity, high-elasticity emulsified asphalt of this invention has an Engler viscosity of 3.5, exhibiting excellent bonding properties. Its bond strength (demonstrated by pull-out strength) is 2 to 3 times higher than that of ordinary emulsified asphalt, making it particularly suitable for sand-containing fog seal layers, ultra-thin wearing layers, etc. Detailed Implementation

[0024] Unless otherwise specified, all raw materials or reagents used in this invention are commercially available products well known in the art.

[0025] This invention provides a high-viscosity, high-elasticity emulsified asphalt, comprising the following components by weight: 100-150 parts base asphalt, 3-7 parts SBS rubber, 25-35 parts solubilizer, 1-5 parts stabilizer, 4-8 parts high-viscosity modifier, 1-5 parts emulsifier, and 90-110 parts water.

[0026] The high viscoelastic modifier includes petroleum resin, natural rubber, or acrylate polymer.

[0027] The high-viscosity, high-elasticity emulsified asphalt material provided by the present invention comprises 100-150 parts of base asphalt, preferably 120-130 parts, by weight.

[0028] In this invention, the softening point of the base asphalt is preferably 44-54℃; the penetration of the base asphalt at 25℃ is preferably 60-80 (1 / 10 mm); the ductility of the asphalt is preferably >100 cm at a temperature of 15℃ and a tensile speed of 5 cm / min; the base asphalt is preferably 70# petroleum asphalt with a viscosity of 160 Pa·s; 70# asphalt has good temperature adaptability and strong durability, and is commonly used as a base material for modified asphalts such as SBS and SBR. Through modification, its properties such as high-temperature rutting resistance and low-temperature crack resistance can be further improved, making it suitable for heavy loads or special climatic conditions.

[0029] Based on the mass fraction of the base asphalt, the high-viscosity, high-elasticity emulsified asphalt material provided by the present invention includes 3 to 7 parts of SBS rubber, preferably 4 to 6 parts, and more preferably 5 parts.

[0030] In this invention, the SBS rubber, namely styrene-butadiene-styrene triblock copolymer, is a thermoplastic elastomer, where S represents the styrene segment and B represents the butadiene segment, and it has linear and star-shaped structures. In this invention, the SBS rubber is preferably linear SBS. Due to its unique molecular structure and properties, SBS rubber possesses excellent physical properties. The styrene segment (hard segment) in the molecular chain provides strength, while the butadiene segment (soft segment) imparts elasticity. Its linear structure allows for a tensile recovery rate of over 80%, resulting in strong resistance to permanent deformation. SBS rubber exhibits good compatibility and good dispersibility when mixed with asphalt, resin, fillers, etc. Especially when used as an asphalt modifier, it can significantly improve the high and low temperature performance and durability of asphalt. In summer, it enhances asphalt performance, improving high-temperature rutting resistance, increasing asphalt viscosity, raising the softening point to above 70℃, and reducing summer pavement deformation. In winter, it improves low-temperature crack resistance and enhances ductility, allowing asphalt mixtures to resist cracking even at -20℃. In addition, SBS rubber can resist aging, delay the oxidation and hardening of asphalt, and extend the service life of the road surface (up to 1.5 to 2 times that of ordinary asphalt).

[0031] Based on the mass fraction of the base asphalt, the high-viscosity, high-elasticity emulsified asphalt material provided by the present invention includes 25 to 35 parts of solubilizer, preferably 28 to 32 parts, and more preferably 30 parts.

[0032] In this invention, the solubilizer preferably includes light oil, vegetable oil, or coal tar, more preferably light oil. This invention does not impose any special limitations on the specific source and specifications of the light oil, vegetable oil, and coal tar; commercially available products well-known in the art or obtained in a manner well-known in the art are acceptable.

[0033] In this invention, the light oil contains a large amount of aromatic compounds with benzene rings as the basic structural unit. SBS linear rubber is a styrene-butadiene-styrene block copolymer, whose molecular chain contains styrene units, and styrene molecules contain benzene ring structures. Both possess the structural characteristic of benzene rings. They exhibit a certain degree of unsaturation: the aromatics in the light oil with high aromatic content have highly unsaturated benzene rings. The butadiene units in the SBS linear rubber molecular chain contain carbon-carbon double bonds and are unsaturated. Therefore, both exhibit a certain degree of unsaturation in their chemical properties and are relatively prone to addition and oxidation reactions.

[0034] In this invention, the solubilizer has a structure similar to the butadiene segments of SBS and the aromatic components in asphalt. It can fill the spaces between SBS molecular chains, reduce intermolecular forces, and promote the uniform dispersion of SBS in asphalt. In addition, it can reduce the viscosity of modified asphalt, delay the phase separation of SBS and asphalt, and prolong the storage stability of modified asphalt.

[0035] Based on the mass fraction of the base asphalt, the high-viscosity, high-elasticity emulsified asphalt material provided by the present invention includes 1 to 5 parts of stabilizer, preferably 2 to 4 parts, and more preferably 3 parts.

[0036] In this invention, the stabilizer preferably includes sulfide stabilizers, organic polymer stabilizers, or compound stabilizers, and more preferably sulfide stabilizers.

[0037] In this invention, the sulfide stabilizer is preferably tetramethylthiuram disulfide, and the organic polymer stabilizer is preferably maleic anhydride; the compound stabilizer is preferably sulfur, aromatic oil, and carbon black. This invention does not impose any special limitations on the proportions of each component in the compound stabilizer; adjustments can be made according to actual needs.

[0038] In this invention, tetramethylthiuram disulfide exhibits good vulcanization-promoting effects and can improve the crosslinking degree of modified asphalt. The reaction mechanism is as follows: under certain thermal conditions, the stabilizer generates active free radicals, which undergo crosslinking and grafting reactions with the SBS polymer molecular chains and the active functional groups of the asphalt, forming a stable colloidal system between the polymer and the asphalt. This improves the thermal stability of the modified asphalt, solves the problem of segregation during storage, and allows the modified asphalt product to maintain a storage stability of over 60 days. After adding the stabilizer, a stable interfacial adsorption layer is formed between the polymer phase and the matrix asphalt phase in the modified asphalt, reducing the surface tension of the interfacial layer and increasing the affinity between the two phases.

[0039] Based on the mass fraction of the base asphalt, the high-viscosity, high-elasticity emulsified asphalt material provided by the present invention includes 4 to 8 parts of a high-viscosity, high-elasticity modifier, preferably 5 to 7 parts, and more preferably 6 parts.

[0040] In this invention, the high viscoelastic modifier preferably includes petroleum resin, natural rubber, or acrylate polymer, with the petroleum resin more preferably being C9 petroleum resin (softening point of 112°C); the natural rubber is preferably ENR-50 epoxidized natural rubber; and the acrylate polymer is preferably polyurethane acrylate.

[0041] In this invention, C9 petroleum resin has high viscosity, which can significantly increase the viscosity of asphalt, resulting in better adhesion during use. This enhances the bond between asphalt and aggregates, improving the overall performance of the modified asphalt. Petroleum resin is a thermoplastic resin polymerized from the C9 fraction, a byproduct of ethylene production from petroleum cracking. C9 petroleum resin has good compatibility with asphalt, allowing it to be uniformly dispersed in the asphalt to form a stable system, thus ensuring the stable performance of the modified asphalt. C9 petroleum resin also possesses certain water resistance and weather resistance, improving the water resistance and anti-aging properties of the modified asphalt and extending its service life.

[0042] Based on the mass fraction of the base asphalt, the high-viscosity, high-elasticity emulsified asphalt material provided by the present invention comprises 1 to 5 parts of emulsifier, preferably 2 to 4 parts, and more preferably 3 parts. In the present invention, the emulsifier preferably includes one or more of sodium dodecyl diphenyl ether disulfonate (cationic emulsifier), sodium dodecyl sulfate, and sodium dodecylbenzene sulfonate, more preferably sodium dodecyl diphenyl ether disulfonate.

[0043] Among them, sodium dodecyl diphenyl ether disulfonate emulsifier has strong emulsifying ability: it can make the oil phase and water phase mix evenly to form a stable emulsion, effectively reduce the surface tension of the oil-water interface, make the particle size distribution of the emulsion narrower, and have high stability; it has high chemical stability: it is not easy to react chemically with other components in the emulsion, has a certain tolerance to acids and alkalis, and can maintain the performance of the emulsifier in different chemical environments.

[0044] Based on the mass fraction of the base asphalt, the high-viscosity, high-elasticity emulsified asphalt material provided by the present invention comprises 90-110 parts of water, preferably 95-105 parts, and more preferably 100 parts. In the present invention, the water preferably does not contain soluble salts, the pH value of the water is preferably 6.0-8.0, and the water is preferably drinking water.

[0045] This invention provides a method for preparing the high-viscosity, high-elasticity emulsified asphalt described in the above technical solution, comprising the following steps:

[0046] Modified asphalt is obtained by heating and swelling base asphalt, SBS rubber, and solubilizer.

[0047] After the modified asphalt is heated and sheared, a stabilizer is added and shearing is continued. The resulting asphalt product undergoes a first thermal development to obtain SBS modified asphalt.

[0048] The SBS modified asphalt was heated and mixed with a high viscoelastic modifier, and then subjected to a second thermal development to obtain composite modified asphalt.

[0049] The composite modified asphalt was mixed with emulsifier and water, and then ground to obtain high-viscosity and high-elasticity emulsified asphalt.

[0050] In this invention, the heating and swelling temperature is preferably 160-175°C, more preferably 170°C, and the time is preferably 20-30 min, more preferably 30 min; the heating and shearing temperature is preferably 175-185°C, more preferably 185°C, the shearing speed is preferably 5000-6000 rad / min, more preferably 5500 rad / min, and the shearing time is preferably 25-30 min, more preferably 25 min; after adding the stabilizer, the shearing is continued for 5 min.

[0051] In this invention, the temperature of the first thermal development is preferably 165-175°C, more preferably 170°C, and the time is preferably 25-35 min, more preferably 30 min.

[0052] In this invention, the heating and mixing temperature is preferably 175-185°C, more preferably 180°C, and the time is preferably 10 min.

[0053] The preferred temperature for the second thermal development is 165–180°C, more preferably 180°C, and the preferred time is 25–35 min, more preferably 30 min.

[0054] The present invention preferably involves first heating the base asphalt, adding SBS rubber and a solubilizer, heating to a molten state, and continuously stirring in a zigzag pattern with a glass rod for 30 minutes to disperse the SBS in the base asphalt and allow it to swell, thus obtaining modified asphalt. After heating, the modified asphalt is sheared on a high-speed shearing machine, and then a stabilizer is added followed by shearing for another 5 minutes. The sheared SBS modified asphalt undergoes a first thermal development in an oven. The resulting SBS modified asphalt is then heated, and a high-viscoelastic modifier is added to an oil bath for heating and mixing. The product is then transferred to an oven for a second thermal development, resulting in composite modified asphalt. An emulsifier and water are mixed (the resulting emulsifier aqueous solution is at 70°C) and added to the composite modified asphalt (at 180°C). The mixture is then ground in a colloid mill at a speed of 5000 rad / min for 10 minutes to obtain high-viscosity, high-elasticity emulsified asphalt.

[0055] This invention provides the application of the high-viscosity, high-elasticity emulsified asphalt described in the above-described technical solution or the high-viscosity, high-elasticity emulsified asphalt prepared by the above-described technical solution in sealing materials.

[0056] This invention provides a high-viscosity, high-elasticity sand-containing fog seal material, comprising the following components by mass: 90-120 parts of high-viscosity, high-elasticity emulsified asphalt and 30-50 parts of aggregate; wherein the high-viscosity, high-elasticity emulsified asphalt is the high-viscosity, high-elasticity emulsified asphalt described in the above technical solution or the high-viscosity, high-elasticity emulsified asphalt prepared by the preparation method described in the above technical solution.

[0057] By weight, the high-viscosity, high-elasticity sand-containing fog seal material provided by this invention comprises 90-120 parts, preferably 100-110 parts, of the aforementioned high-viscosity, high-elasticity emulsified asphalt. The high-viscosity, high-elasticity emulsified asphalt of this invention has a viscosity of 80 mPa·s, exhibits excellent bonding performance, and has a bonding strength 2-3 times higher than ordinary emulsified asphalt, making it particularly suitable for sand-containing fog seals, ultra-thin wearing courses, etc.

[0058] Based on the mass fraction of the high-viscosity, high-elasticity emulsified asphalt, the high-viscosity, high-elasticity sand-containing fog seal material provided by the present invention includes 30 to 50 parts of aggregate, preferably 35 to 45 parts, and more preferably 40 parts.

[0059] In this invention, the aggregate preferably comprises one or more of corundum, basalt sand, and quartz sand. In this invention, the particle passing rate through a 2.0 mm sieve is 95–100 wt%, more preferably 95.8 wt%; the particle passing rate through a 1.5 mm sieve is 20–35 wt%, more preferably 25.9 wt%; and the particle passing rate through a 0.6 mm sieve is 0–10 wt%, more preferably 8.4 wt%.

[0060] The present invention does not impose any special limitations on the preparation method of the high-viscosity and high-elasticity sand-containing fog seal material. The aggregate is added to the high-viscosity and high-elasticity emulsified asphalt and mixed evenly according to the methods known in the art.

[0061] This invention provides the application of the high-viscosity, high-elasticity sand-containing fog seal material described in the above technical solution in road maintenance.

[0062] The specific embodiments of the present invention are described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention. Unless otherwise specified, the experimental methods described in the embodiments of the present invention are conventional methods.

[0063] Unless otherwise specified, the experimental and testing methods described below are conventional methods; unless otherwise specified, the reagents and raw materials described below are commercially available.

[0064] In the following Examples 1 to 5, the specific types of each raw material are as follows:

[0065] The base asphalt is 70# petroleum asphalt with a viscosity of 160 Pa·s and a softening point of 44–54℃.

[0066] The SBS rubber is linear SBS rubber, sourced from Sinopec Baling Petrochemical.

[0067] The solubilizer is a light oil sourced from Shandong Kaiyuan Runfeng Environmental Protection Technology Co., Ltd.

[0068] The stabilizer is tetramethylthiuram disulfide, sourced from Shandong Shangshun Chemical Co., Ltd.

[0069] The high viscoelastic modifier is C9 petroleum resin with a softening point of 112℃, sourced from Maoming Huayue Petroleum Resin Co., Ltd.

[0070] The emulsifier is sodium dodecyl diphenyl ether disulfonate, sourced from Hubei Chenghai Chemical Co., Ltd.

[0071] The water is for drinking water.

[0072] The aggregate is corundum. The passing rate of particles passing through a 2.0 mm sieve is 95.8 wt%, the passing rate of particles passing through a 1.5 mm sieve is 25.9 wt%, and the passing rate of particles passing through a 0.6 mm sieve is 8.4 wt%.

[0073] Example 1

[0074] 1) Weigh the high-viscosity and high-elasticity emulsified asphalt raw materials according to the following mass parts: 120 parts base asphalt, 5 parts SBS rubber, 30 parts solubilizer, 3 parts stabilizer, 5 parts high-viscosity and high-elasticity modifier, 3 parts emulsifier, and 100 parts water.

[0075] The raw materials for high-viscosity and high-elasticity emulsified asphalt are: 240g base asphalt, 10g SBS rubber, 60g solubilizer, 6g stabilizer, 10g high-viscosity and high-elasticity modifier, 6g emulsifier, and 200g water.

[0076] 2) Heat the base asphalt in the oil bath to 170°C, add SBS rubber and solubilizer in sequence, heat to a molten state, and continuously stir and mix with a glass rod in a zigzag pattern for 30 minutes until it swells to obtain modified asphalt;

[0077] 3) Raise the temperature to 185℃, shear the modified asphalt on a high-speed shear machine at a speed of 5500 rad / min for 25 minutes, then add the stabilizer and continue shearing for another 5 minutes;

[0078] 4) Place the sheared SBS modified bitumen into a 170℃ oven for 30 minutes to mature;

[0079] 5) Heat the developed modified asphalt to 180℃, place it in a 180℃ oil bath, add a high viscoelastic modifier, and stir at 60 r / min for 10 min; transfer the resulting composite modified asphalt to a 180℃ oven for 30 min of development.

[0080] 6) Mix the emulsifier and water to form an emulsifier aqueous solution, and control the temperature at 70℃. Control the temperature of the composite modified asphalt at 180℃. Grind the aqueous solution and the composite modified asphalt together in a colloid mill at a speed of 5000 rad / min for 10 min to obtain high-viscosity and high-elasticity emulsified asphalt.

[0081] Weigh the high-viscosity, high-elasticity sand-containing fog seal material according to the following mass ratio: 110 parts of high-viscosity, high-elasticity emulsified asphalt and 40 parts of aggregate; the corresponding mass of the high-viscosity, high-elasticity sand-containing fog seal material is: 330g of high-viscosity, high-elasticity emulsified asphalt and 120g of aggregate.

[0082] High-viscosity, high-elasticity emulsified asphalt material is mixed with aggregates to obtain a high-viscosity, high-elasticity sand-containing fog seal material.

[0083] Example 2

[0084] In this embodiment: High-viscosity and high-elasticity emulsified asphalt raw materials: 120 parts of base asphalt, 4 parts of SBS rubber, 28 parts of solubilizer, 3 parts of stabilizer, 6 parts of high-viscosity and high-elasticity modifier, 3 parts of emulsifier, and 100 parts of water.

[0085] The corresponding raw material weights for high-viscosity and high-elasticity emulsified asphalt are: 240g base asphalt, 8g SBS rubber, 56g solubilizer, 6g stabilizer, 12g high-viscosity and high-elasticity modifier, 6g emulsifier, and 200g water.

[0086] In this embodiment: High-viscosity, high-elasticity sand-containing fog seal material: 110 parts of high-viscosity, high-elasticity emulsified asphalt and 40 parts of aggregate; the corresponding mass of high-viscosity, high-elasticity sand-containing fog seal material is: 330g of high-viscosity, high-elasticity emulsified asphalt and 120g of aggregate.

[0087] The corresponding mass of high-viscosity, high-elasticity sand-containing fog seal material is: 330g of high-viscosity, high-elasticity emulsified asphalt and 120g of aggregate.

[0088] The preparation method is the same as in Example 1.

[0089] Example 3

[0090] In this embodiment: High-viscosity and high-elasticity emulsified asphalt raw materials: 120 parts of base asphalt, 6 parts of SBS rubber, 32 parts of solubilizer, 3 parts of stabilizer, 7 parts of high-viscosity and high-elasticity modifier, 3 parts of emulsifier, and 100 parts of water.

[0091] The mass fraction of the high-viscosity and high-elasticity emulsified asphalt raw materials is as follows: base asphalt 240g, SBS rubber 12g, solubilizer 64g, stabilizer 6g, high-viscosity and high-elasticity modifier 14g, emulsifier 6g, and water 200g.

[0092] In this embodiment: High-viscosity, high-elasticity sand-containing fog seal material: 110 parts of high-viscosity, high-elasticity emulsified asphalt and 40 parts of aggregate; the corresponding mass of high-viscosity, high-elasticity sand-containing fog seal material is: 330g of high-viscosity, high-elasticity emulsified asphalt and 120g of aggregate.

[0093] The preparation method is the same as in Example 1.

[0094] Comparative Example 1

[0095] Jiangsu Expressway New Material Technology Co., Ltd. was selected; the emulsified asphalt model is BCR.

[0096] High-viscosity, high-elasticity sand-containing fog seal material: 110 parts of high-viscosity, high-elasticity emulsified asphalt BCR and 40 parts of aggregate; correspondingly weigh 330g of high-viscosity, high-elasticity emulsified asphalt and 120g of aggregate from Jiangsu Expressway New Materials.

[0097] Performance testing

[0098] The performance of the high-viscosity, high-elasticity emulsified asphalt in Examples 1-3 and Comparative Example 1 was tested according to the method described in the industry standard JTG F40-2004. The results are shown in Table 1.

[0099] Table 1 Performance Indicators of High-Viscosity and High-Elasticity Emulsified Asphalt

[0100]

[0101] Table 1 shows that the high-viscosity, high-elasticity emulsified asphalt of the present invention has a sieve residue of 0; Engrade viscosity of 3.2-3.8; content greater than 60%; softening point of 74-77℃; penetration of 39-42; ductility at 5℃ of 50-56; elastic recovery of 95.6-96.9%; dynamic viscosity of 119525-128654 Pa*s; storage stability of 0.45-0.56% after 1 day; and storage stability of 2.36-3.23% after 5 days. In contrast, the high-viscosity, high-elasticity emulsified asphalt of Comparative Example 1 has a sieve residue of 0; Engrade viscosity of 2.7; content of 55%; softening point of 55℃; penetration of 109; ductility at 5℃ of 33; elastic recovery of 90.2%; dynamic viscosity of 95469 Pa*s; storage stability of 3.69% after 1 day; and storage stability of 8.84% after 5 days. The indicators of Examples 1 to 3 of the present invention are all superior to those of Comparative Example 1.

[0102] 2) The performance of the high-viscosity, high-elasticity sand-containing fog seal materials in Examples 1-3 and Comparative Example 1 was tested according to the method described in the industry standard JTG E20-2011. The results are shown in Table 2.

[0103] Table 2 Performance Indicators of High-Viscosity, High-Elasticity Sand-Containing Fog Seal Materials

[0104]

[0105] Table 2 shows that the wet wheel abrasion value of the high-viscosity, high-elasticity sand-containing mist seal material of the present invention is 48.5-56.4 m. 2 The tensile strength at 25℃ is 2.13-2.31 MPa; the permeability coefficient is 52-63 mL / min; the anti-slip index (BPN20) is 62-65; and the structural depth requirement (TD) is 0.54-0.62.

[0106] The comparison shows that the average wet wheel wear value of the examples is 11 higher than that of Comparative Example 1; the average tensile strength at 25℃ is 1.31 higher than that of Comparative Example 1; the average water permeability coefficient of the examples is 73 lower than that of Comparative Example 1; and the average anti-slip index of the examples is 21 higher than that of Comparative Example 1. This indicates that the high-viscosity and high-elasticity sand-containing fog seal material of the present invention has good anti-slip performance, high bonding strength, good water permeability, and strong anti-aging performance.

[0107] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A high-viscosity, high-elasticity emulsified asphalt, characterized in that, By weight, it comprises the following components: 100-150 parts base asphalt, 3-7 parts SBS rubber, 25-35 parts solubilizer, 1-5 parts stabilizer, 4-8 parts high viscoelastic modifier, 1-5 parts emulsifier, and 90-110 parts water. The high viscoelastic modifier includes petroleum resin, natural rubber, or acrylate polymer.

2. The high-viscosity, high-elasticity emulsified asphalt according to claim 1, characterized in that, The SBS rubber is linear; the solubilizer includes light oil, vegetable oil, or coal tar.

3. The high-viscosity, high-elasticity emulsified asphalt according to claim 1, characterized in that, The stabilizers include sulfide stabilizers, organic polymer stabilizers, or compound stabilizers.

4. The high-viscosity, high-elasticity emulsified asphalt according to claim 1, characterized in that, The emulsifier includes one or more of sodium dodecyl diphenyl ether disulfonate, sodium dodecyl sulfate, and sodium dodecylbenzene sulfonate.

5. The method for preparing high-viscosity, high-elasticity emulsified asphalt according to any one of claims 1 to 4, characterized in that, Includes the following steps: Modified asphalt is obtained by heating and swelling base asphalt, SBS rubber, and solubilizer. After the modified asphalt is heated and sheared, a stabilizer is added and shearing is continued. The resulting asphalt product undergoes a first thermal development to obtain SBS modified asphalt. The SBS modified asphalt was heated and mixed with a high viscoelastic modifier, and then subjected to a second thermal development to obtain composite modified asphalt. The composite modified asphalt was mixed with emulsifier and water, and then ground to obtain high-viscosity and high-elasticity emulsified asphalt.

6. The preparation method according to claim 5, characterized in that, The heating and swelling temperature is 160–175°C, and the time is 20–30 min; the heating and shearing temperature is 175–185°C, the shearing rate is 5000–6000 rad / min, and the shearing time is 25–30 min; the first thermal development temperature is 165–175°C, and the time is 25–35 min; the heating and mixing temperature is 175–185°C; and the second thermal development temperature is 165–180°C, and the time is 25–35 min.

7. The application of the high-viscosity, high-elasticity emulsified asphalt according to any one of claims 1 to 4, or the high-viscosity, high-elasticity emulsified asphalt prepared by the preparation method according to claim 5 or 6, in sealing materials.

8. A high-viscosity, high-elasticity sand-containing fog seal material, comprising the following components by mass: 90-120 parts of high-viscosity, high-elasticity emulsified asphalt and 30-50 parts of aggregate; wherein the high-viscosity, high-elasticity emulsified asphalt is the high-viscosity, high-elasticity emulsified asphalt according to any one of claims 1-4 or the high-viscosity, high-elasticity emulsified asphalt prepared by the preparation method according to claim 5 or 6.

9. The high-viscosity, high-elasticity sand-containing fog sealing material according to claim 8, characterized in that, The aggregate includes one or more of corundum, basalt sand and quartz sand.

10. The application of the high-viscosity, high-elasticity sand-containing fog seal material as described in claim 8 or 9 in road maintenance.

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