Mountainous area tunnel cold-state anti-skid noise-reduction maintenance material and application thereof

Abstract

The invention relates to the technical field of highway engineering, in particular to a mountainous area tunnel cold-state anti-skid noise-reduction maintenance material and a preparation method and application thereof, and the mountainous area tunnel cold-state anti-skid noise-reduction maintenance material comprises the following components in parts by weight: 10-15 parts of modified emulsified asphalt, 70-90 parts of gravel, 5-15 parts of noise-reduction particles and 0-5 parts of an inorganic powder material. During application, the gravel, the noise reduction particles and the inorganic powder material are uniformly stirred to obtain a mixture, the modified emulsified asphalt is heated to 50-60 DEG C to obtain an asphalt material, then the asphalt material and the mixture are uniformly sprayed on a pavement in sequence, and then the pavement is cured and rolled to form a wearing layer on the pavement. The pavement wearing layer formed by adopting the maintenance material disclosed by the invention has excellent skid resistance, noise reduction performance and durability, can improve the driving safety and comfort, and is formed at one time by adopting a cold-state spraying process, so that the construction speed is high, the traffic can be quickly opened, the influence on the traffic is small, and the pavement wearing layer is more economical.

Description

Technical Field

[0001] The present invention relates to the technical field of highway engineering, and particularly relates to a cold anti-slip and noise-reducing maintenance material for mountain tunnels, a preparation method thereof, and an application thereof. Background Art

[0002] With the gradual improvement of China's highway network, the highway has changed from the high-speed construction period to the maintenance period. In order to reduce the whole life cycle cost during the entire operation period of the highway, under the condition that various indicators of the highway are certain, a certain amount of preventive maintenance is carried out to repair some functional damages of the highway, which can effectively extend the comprehensive service life of the highway and reduce the whole life cycle cost of highway operation. There are many preventive maintenance technologies, and scientific and reasonable preventive maintenance technologies can be selected according to different maintenance requirements. In addition to considering the maintenance requirements, the highway preventive technology also needs to reduce the impact on traffic volume, driving safety, and carbon emissions and other objective factors. Mountain tunnels generally have constant temperature and humidity, and the temperature inside the tunnel is very different from that outside the tunnel. Moreover, according to detailed investigations, the annual temperature does not exceed 35°C, and the humidity is above 50% all year round. When using the cold maintenance technology, the requirements for materials for rapid prototyping are very high, and at the same time, the requirements for the fineness of the process are very high. At present, after 3-5 years of operation of mountain tunnels on highways, the common problems are: (1) The asphalt film on the road surface is polished, the texture depth is significantly reduced, the anti-slip function decays seriously, and the safety is insufficient; (2) A layer of oil film is formed on the road surface due to vehicle exhaust emissions, which affects the adhesion with the preventive maintenance material; (3) The driving noise in the tunnel is very large, which affects driving safety and comfort, especially for long tunnels in mountainous areas. Summary of the Invention

[0003] In order to overcome the deficiencies of the above-mentioned prior art, the purpose of the present invention is to provide a cold anti-slip and noise-reducing maintenance material for mountain tunnels, which can significantly improve the anti-slip performance of the road surface, reduce driving noise, and improve driving safety and comfort.

[0004] To achieve the above purpose, the technical solution of the present invention is a cold anti-slip and noise-reducing maintenance material for mountain tunnels, comprising the following components in parts by weight: 10-15 parts of modified emulsified asphalt, 70-90 parts of crushed stone, 5-15 parts of noise-reducing particles, and 0-5 parts of inorganic powder material.

[0005] As one of the implementation manners, the inorganic powder material is cement or mineral powder; the crushed stone is one or more of basalt crushed stone, diabase crushed stone, and emery, and the particle size is 3-8 mm; the particle size of the noise-reducing particles is 3-5 mm.

[0006] As one of the implementation manners, the noise reduction particles include the following components by weight parts: 1-20 parts of raw material oil, 30-90 parts of waste tire rubber powder, 10-30 parts of SBS modifier, and 10-30 parts of petroleum resin.

[0007] As one of the implementation manners, the raw material oil is base oil or white oil; the particle size of the waste tire rubber powder is ≤1 mm; the SBS modifier is one or more of star-shaped SBS modifier and linear SBS modifier; the petroleum resin is C9 petroleum resin, C5 petroleum resin or C5 / C9 blended petroleum resin.

[0008] As one of the implementation manners, the preparation method of the noise reduction particles includes the following steps:

[0009] S1. Heat the raw material oil to 180-200 °C and keep it warm;

[0010] S2. Add the SBS modifier and stir until the SBS modifier is fully dissolved to obtain an SBS modified elastomer;

[0011] S3. Heat the SBS modified elastomer to 200-250 °C;

[0012] S4. Slowly add the waste tire rubber powder, stir while adding, continue to add until completion after the rubber powder is preliminarily dissolved, and then stir at 180-200 °C until the rubber powder is fully dissolved;

[0013] S5. Add the petroleum resin, stir while adding until it is completely dissolved to obtain an elastic colloid;

[0014] S6. Put the elastic colloid into an extrusion granulator, extrude and granulate to obtain the noise reduction particles.

[0015] As one of the implementation manners, the modified emulsified asphalt includes the following components by weight parts: 50-65 parts of petroleum asphalt, 2-10 parts of extender, 2-10 parts of linear SBS modifier, 1-5 parts of surfactant, 1-5 parts of stabilizer, and 30-40 parts of water.

[0016] As one of the implementation manners, the preparation method of the modified emulsified asphalt includes the following steps:

[0017] S1. Heat the petroleum asphalt to 170-200 °C and keep it warm;

[0018] S2. Add the extender and stir evenly;

[0019] S3. Then add the linear SBS modifier, stir evenly, shear through a colloid mill 2-3 times, and then keep it warm at 175-185 °C and stir for 1 h-5 h to obtain the modified asphalt;

[0020] S4. Heat the water to 60 - 70 °C, keep it warm, add the surfactant and stabilizer, and stir evenly to obtain the soap solution;

[0021] S5. Add the modified asphalt into the soap solution, and shear and fuse it with a colloid mill to obtain the modified emulsified asphalt.

[0022] As one of the implementation manners, the modified emulsified asphalt further includes SBS latex with a solid content of 40% and SBR latex with a solid content of 65%. The dosage of the SBS latex is 8 - 10% of the total mass of the modified emulsified asphalt, and the dosage of the SBR latex is 4 - 6% of the total mass of the modified emulsified asphalt.

[0023] The present invention also provides an application of the cold anti - skid and noise - reducing maintenance material for mountain tunnels described in any one of the above. First, mix the crushed stones, noise - reducing particles, and inorganic powder materials evenly to obtain a mixture. Heat the modified emulsified asphalt to 50 - 60 °C to obtain the asphalt material, then evenly spray the asphalt material and the mixture onto the road surface in sequence, and then cure and roll to form a wearing course on the road surface.

[0024] As one of the implementation manners, the thickness of the wearing course is 4 - 10 mm.

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

[0026] (1) The wearing course formed on the road surface by using the maintenance material of the present invention has excellent anti - skid performance and noise - reducing performance, can increase the pendulum friction coefficient of the original road surface to 65 - 76, the texture depth to 0.7 - 1.2, reduce the driving noise by 2 - 5 dB, improve the driving safety and comfort, and has good durability;

[0027] (2) The maintenance material of the present invention adopts a cold - spraying type process for one - time forming. It not only has a fast construction speed, can realize rapid opening to traffic with little impact on traffic, but also is more economical;

[0028] (3) When constructing the maintenance material of the present invention, there is no need to consider problems such as the compatibility between the modified emulsified asphalt and the stone materials, the forming time, and the workability during construction, and the quality control is simple;

[0029] (4) The noise - reducing particles of the present invention have excellent resilience performance at an ambient temperature of 5 - 40 °C. While ensuring noise reduction, they can also ensure the durability of the road surface noise - reducing function, and are especially suitable for the maintenance of mountain tunnel road surfaces;

[0030] (5) The present invention uses crushed stones with a single particle size. After forming, both the texture depth and the skid value are increased by 50% - 200% compared with the original road surface. At the same time, the pores formed by the crushed stones can adsorb a certain amount of oil film formed by vehicle exhaust, further improving the anti - skid effect of the road surface;

[0031] (6) The crushed stones of the present invention have a particle size of 3 - 8 mm, which not only ensures sufficient anti - skid performance but also ensures that under the action of high - speed driving loads, no flying particles are generated, or even if flying particles are generated, they will not hit the driving glass and break the driving glass, etc., thus reducing potential safety hazards.

[0032] (7) The modified emulsified asphalt of the present invention has good low - temperature anti - cracking performance, with a ductility at 5°C greater than 50 cm, and the wearing course of the asphalt mixture will not shrink and crack at - 20°C.

[0033] (8) The modified emulsified asphalt of the present invention is modified with SBS and compounded with SBS latex, with a softening point greater than 80°C, higher than the maximum service temperature of the road surface, so that the entire wearing course has good high - temperature stability, and will not soften and flow at 60°C, thus avoiding road surface quality problems such as "running particles". Specific Embodiments

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] The embodiments of the present invention provide a cold - state anti - skid and noise - reducing maintenance material for mountain tunnels, which includes the following components by weight: 10 - 15 parts of modified emulsified asphalt, 70 - 90 parts of crushed stones, 5 - 15 parts of noise - reducing particles, and 0 - 5 parts of inorganic powder materials.

[0036] Among them, the inorganic powder material is cement or mineral powder, and specifically, C32.5 cement or limestone powder can be used; the crushed stones are one or more of basalt crushed stones, diabase crushed stones, and emery, with a particle size of 3 - 8 mm, which not only ensures sufficient anti - skid performance but also ensures that under the action of high - speed driving loads, no flying particles are generated, or even if flying particles are generated, they will not hit the driving glass and break the driving glass, etc., thus reducing potential safety hazards. And using single - sized crushed stones, the texture depth and skid number after forming are both increased by 50% - 200% compared with the original road surface. At the same time, the pores formed by the crushed stones can adsorb a certain amount of oil film formed by vehicle exhaust, further improving the anti - skid effect of the road surface; the basalt crushed stones and diabase crushed stones are required to have a high - temperature crushing value of the parent rock ≤18%, a Los Angeles abrasion value ≤20%, a polished stone value (PSV) ≥42, a sand equivalent ≥65, and a methylene blue value ≤1.5; the particle size of the noise - reducing particles is 3 - 5 mm.

[0037] Optimizing the above - mentioned embodiment, the noise - reducing particles include the following components by weight: 1 - 20 parts of raw oil, 30 - 90 parts of waste tire rubber powder, 10 - 30 parts of SBS modifier, and 10 - 30 parts of petroleum resin.

[0038] Among them, the feedstock oil is base oil or white oil (Xinyue SY-AS); the particle size of the waste tire rubber powder is ≤1 mm, and waste tire rubber powder with 20 mesh, 40 mesh or 60 mesh can be specifically used; the SBS modifier is one or more of star SBS modifiers (4303, 161B), linear SBS modifiers (791, 6303, 7302), and scraps in the processing process; the petroleum resin is C9 petroleum resin, C5 petroleum resin or C5 / C9 blended petroleum resin.

[0039] Furthermore, the preparation method of the noise reduction particles includes the following steps:

[0040] S1. Heat the feedstock oil to 180 - 200 °C and keep it warm.

[0041] S2. Add the SBS modifier to the feedstock oil that has been heated and kept warm, control the stirring rate at 300 - 500 r / min, stir until the SBS modifier is fully dissolved, and the stirring time is 30 - 180 min to obtain an SBS modified elastomer.

[0042] S3. Heat the melted SBS modified elastomer to 200 - 250 °C.

[0043] S4. Slowly add the waste tire rubber powder to the heated SBS modified elastomer, stir while adding, continue to add until completion after the rubber powder is initially dissolved; then stir at 180 - 200 °C for 120 min - 240 min, and keep it warm for use after the rubber powder is fully dissolved.

[0044] S5. Add the petroleum resin, stir while adding until the petroleum resin is completely dissolved to obtain an elastic colloid.

[0045] S6. Put the prepared elastic colloid into an extrusion granulator, extrude and granulate according to the designed specifications to obtain noise reduction particles.

[0046] In this embodiment, the waste tire rubber powder is fully dissolved by using the feedstock oil, the synthetic rubber and natural rubber in the rubber are fully released, and by utilizing the excellent elastic properties of the synthetic rubber and natural rubber, the SBS modifier and the petroleum resin react fully to make the SBS form a stable three-dimensional network structure, improving the strength and toughness of the rubber particles, so that the noise reduction particles have excellent resilience and excellent durability at 5 - 40 °C, and are especially suitable for the maintenance of mountain tunnel pavements.

[0047] Optimize the above embodiment. The modified emulsified asphalt comprises the following components in parts by weight: 50 - 65 parts of petroleum asphalt, 2 - 10 parts of extender, 2 - 10 parts of linear SBS modifier, 1 - 5 parts of surfactant, 1 - 5 parts of stabilizer, and 30 - 40 parts of water. The modified emulsified asphalt of this embodiment has good low-temperature anti-cracking property, with a ductility at 5°C greater than 50 cm, and the thin layer of asphalt mixture will not shrink and crack at -20°C.

[0048] Among them, the petroleum asphalt is 70A or 90A road petroleum asphalt; the extender is Shandong Furunda extender, Wuhan Kangrun extender, or Shanghai Lukang extender; the linear SBS modifier is one or more products of linear polymer elastomer 791 produced by Yueyang Petrochemical Company and Huizhou Lee Chang Yung Rubber Co., Ltd.; the surfactant is one or more of Xinyue SY-MK7, Jiangsu Jinyang Technology R7M, Jinan Shengquan L7, Jinan Shengquan A3, and Jinan Shengquan A9; the stabilizer is one or more of barium sulfate, hydroxyethyl methyl cellulose, and acrylate.

[0049] Furthermore, the preparation method of the modified emulsified asphalt comprises the following steps:

[0050] S1. Heat the petroleum asphalt to 170 - 200°C and keep it warm.

[0051] S2. Add the extender to the petroleum asphalt that has been heated and kept warm, keep it warm and stir, with a stirring speed of 300 - 1000 r / min, stir evenly to ensure that the extender is fully integrated with the petroleum asphalt, and the stirring time is 30 min - 1 h.

[0052] S3. Then add the linear SBS modifier to the petroleum asphalt after fusing the extender, control the molecular weight of SBS at 80000 - 120000, stir evenly, shear through a colloid mill 2 - 3 times, then keep it warm at 175 - 185°C and stir for 1 h - 5 h to obtain the modified asphalt.

[0053] S4. Heat the water to 60 - 70°C and keep it warm, add the surfactant and stabilizer to the water, and stir evenly to obtain the soap solution.

[0054] S5. Add the modified asphalt to the soap solution, shear and fuse through a colloid mill to obtain the modified emulsified asphalt, and cool it to room temperature or the use temperature for standby.

[0055] Optimally, the modified emulsified asphalt further comprises SBS latex with a solid content of 40% and SBR latex with a solid content of 65%. The dosage of the SBS latex is 8-10% of the total mass of the modified emulsified asphalt, and the dosage of the SBR latex is 4-6% of the total mass of the modified emulsified asphalt. In this embodiment, by adding appropriate amounts of SBS latex and SBR latex to the modified emulsified asphalt, the bonding performance of the viscoelastic modified emulsified asphalt, the high-temperature resistance at 180-200°C, and the low-temperature resistance of the entire material can be improved.

[0056] In step S5, the modified asphalt is added to the soap solution. After shear fusion by a colloid mill, SBS latex with a solid content of 40% and SBR latex with a solid content of 65% are added, and then stirred evenly to obtain the modified emulsified asphalt. This process can be stirred manually or dispersed evenly by a special stirring device. It is preferred to use a special stirring device.

[0057] The storage time of the modified emulsified asphalt prepared by the above method is 1-10 days. If it is used beyond this storage time, segregation is likely to occur, affecting the use effect.

[0058] The present invention also provides an application of the cold anti-skid and noise-reducing maintenance material for mountain tunnels described in any one of the above. First, the crushed stones, noise-reducing particles, and inorganic powder materials are mixed evenly to obtain a mixture. The modified emulsified asphalt is heated to 50-60°C to obtain asphalt material. Then, the asphalt material and the mixture are evenly sprayed onto the road surface in sequence, and then cured and rolled to form a wearing course on the road surface.

[0059] Furthermore, the thickness of the wearing course is 4-10 mm. Using the anti-skid and noise-reducing maintenance material of this embodiment can form a relatively thin wearing course, which not only has a low cost, does not raise the original road surface and affect the original traffic facilities, but also can effectively extend the service life of the road.

[0060] Specifically, before construction, the traffic is diverted and the road surface is blown clean. During construction, first, the speed of the spraying vehicle is calibrated. The crushed stones, noise-reducing particles, and inorganic powder materials are mixed evenly to obtain a mixture. The modified emulsified asphalt is heated to 50-60°C to obtain asphalt material, and the asphalt material and the mixture are respectively loaded into the asphalt material tank and the mixture tank of the spraying vehicle. The asphalt material tank is connected with an asphalt material spraying mechanism, and the mixture tank is connected with a mixture tank spraying machine. Then, the spraying vehicle is started and driven at the calibrated speed, which can be 100-200 m / min, preferably 6.4 km / h. The asphalt material is evenly sprayed onto the road surface by the asphalt material spraying mechanism, and the mixture is evenly sprayed onto the asphalt material on the road surface by the mixture tank spraying machine located behind the asphalt material spraying mechanism in the driving direction. Then, it is naturally cured for 1.5-2 h, and then rolled 2-4 times by a 15-30 t rubber-tyred roller to form a wearing course on the road surface, and then the traffic is opened.

[0061] This embodiment adopts a cold-spraying process for one-time forming, with a fast construction speed. From traffic diversion to the end of construction, it generally takes 2 - 4 hours, and the traffic can be opened about 3 - 5 hours after construction ends, with little impact on traffic. Moreover, quality control is simple, without the need to consider issues such as the compatibility between modified emulsified asphalt and aggregates, forming time, and workability during construction. After calibrating the vehicle speed and spraying volume, stable construction can be carried out.

[0062] The wearing course formed by using the maintenance materials and methods of this embodiment has good durability, with a service life of 3 - 5 years, which is basically the same as or even higher than that of traditional cold maintenance processes, and is more economical. Compared with the traditional cold mixing process, the unit cost is reduced by 30% - 40%, and compared with hot mix asphalt mixture, the cost is reduced by 50%, with extremely high cost performance.

[0063] The cold anti-skid and noise-reducing maintenance materials for mountain tunnels of the present invention will be described below through specific embodiments.

[0064] In the following examples and comparative examples, the experimental methods are all conventional methods unless otherwise specified. The raw materials, reagent materials, etc. used in the following examples are all commercially available products unless otherwise specified. Among them,

[0065] The particle size of basalt gravel and diabase gravel is 3 - 8 mm, and the high-temperature crushing value of the parent rock ≤ 18%, Los Angeles abrasion value ≤ 20%, polished stone value (PSV) ≥ 42, sand equivalent ≥ 65, methylene blue value ≤ 1.5;

[0066] The raw material oil is selected from the base oil produced by Xinyue, the star-shaped SBS modifier uses the star-shaped SBS modifier 4303, the linear SBS modifier uses the linear SBS modifier 791, the extender uses the extender produced by Shandong Furunda, and the surfactant uses Xinyue SY-MK7.

[0067] Example 1

[0068] This embodiment provides a cold anti-skid and noise-reducing maintenance material for mountain tunnels, including the following components by weight: 10 parts of modified emulsified asphalt, 90 parts of basalt gravel, 5 parts of noise-reducing particles, and 3 parts of cement;

[0069] Among them, the noise-reducing particles include the following components by weight: 10 parts of base oil, 50 parts of 40-mesh waste tire rubber powder, 20 parts of star-shaped SBS modifier, and 20 parts of C9 petroleum resin; the preparation method of the noise-reducing particles includes the following steps:

[0070] S1. Heat the base oil to 200 °C and keep it warm;

[0071] S2. Add star-shaped SBS modifier to the base oil that has been heated and kept warm, control the stirring rate at 400 r / min, stir until the star-shaped SBS modifier is fully dissolved, and the stirring time is 100 min to obtain SBS modified elastomer;

[0072] S3. Heat the melted SBS modified elastomer to 250 °C;

[0073] S4. Slowly add waste tire rubber powder to the heated SBS modified elastomer while stirring. After the rubber powder is initially dissolved, continue to add until completion; then stir at 190 °C for 200 min. After the rubber powder is fully dissolved, keep it warm for standby;

[0074] S5. Add C9 petroleum resin while stirring until the C9 petroleum resin is completely dissolved to obtain elastic colloid;

[0075] S6. Put the prepared elastic colloid into an extrusion granulator for extrusion granulation to obtain noise reduction particles with a particle size of 3 - 5 mm;

[0076] The modified emulsified asphalt includes the following components by weight: 55 parts of 90A road petroleum asphalt, 6 parts of extender, 7 parts of linear SBS modifier, 3 parts of surfactant, 2 parts of barium sulfate, 35 parts of water, and also includes SBS latex with a solid content of 40% and SBR latex with a solid content of 65%. And the dosage of the SBS latex is 9% of the total mass of the modified emulsified asphalt, and the dosage of the SBR latex is 5% of the total mass of the modified emulsified asphalt; The preparation method of the modified emulsified asphalt includes the following steps:

[0077] S1. Heat 90A road petroleum asphalt to 170 °C and keep it warm;

[0078] S2. Add extender to the petroleum asphalt that has been heated and kept warm, keep it warm and stir, the stirring speed is 500 r / min, stir evenly to ensure that the extender is fully integrated with the petroleum asphalt, and the stirring time is 45 min;

[0079] S3. Then add linear SBS modifier to the petroleum asphalt after integrating the extender, control the molecular weight of SBS at 80,000 - 120,000, stir evenly, shear it twice through a colloid mill, and then keep it warm at 185 °C and stir for 1 h to obtain modified asphalt;

[0080] S4. Heat water to 70 °C and keep it warm. Add surfactant and barium sulfate to the water and stir evenly to obtain soap solution;

[0081] S5. Add the modified asphalt to the soap solution, shear and fuse it through a colloid mill, add SBS latex with a solid content of 40% and SBR latex with a solid content of 65%, stir evenly to obtain modified emulsified asphalt, and cool it to room temperature or the use temperature for standby.

[0082] Example 2

[0083] This example provides a cold anti - skid and noise - reducing maintenance material for mountain tunnels, which includes the following components by weight: 15 parts of modified emulsified asphalt, 70 parts of basalt gravel, 15 parts of noise - reducing particles, and 3 parts of cement;

[0084] Among them, the noise - reducing particles include the following components by weight: 20 parts of base oil, 90 parts of waste tire rubber powder with a mesh size of 60, 30 parts of star - shaped SBS modifier, and 30 parts of C5 petroleum resin; the preparation method of the noise - reducing particles includes the following steps:

[0085] S1. Heat the base oil to 180 °C and keep it warm;

[0086] S2. Add the star - shaped SBS modifier to the base oil that has been heated and kept warm, control the stirring rate at 300 r / min, stir until the star - shaped SBS modifier is fully dissolved, and the stirring time is 100 min to obtain the SBS - modified elastomer;

[0087] S3. Heat the melted SBS - modified elastomer to 200 °C;

[0088] S4. Slowly add the waste tire rubber powder to the heated SBS - modified elastomer, stir while adding, and continue to add until completion after the rubber powder is initially dissolved; then stir at 180 °C for 120 min, keep it warm for use after the rubber powder is fully dissolved;

[0089] S5. Add C5 petroleum resin, stir while adding until the C5 petroleum resin is completely dissolved to obtain an elastic colloid;

[0090] S6. Put the prepared elastic colloid into an extrusion granulator, extrude and granulate to obtain noise - reducing particles with a particle size of 3 - 5 mm;

[0091] The modified emulsified asphalt includes the following components by weight: 50 parts of 90A road petroleum asphalt, 2 parts of extender, 2 parts of linear SBS modifier, 1 part of surfactant, 1 part of acrylate, 30 parts of water, and also includes SBS latex with a solid content of 40% and SBR latex with a solid content of 65%. The dosage of the SBS latex is 8% of the total mass of the modified emulsified asphalt, and the dosage of the SBR latex is 4% of the total mass of the modified emulsified asphalt; the preparation method of the modified emulsified asphalt includes the following steps:

[0092] S1. Heat the 90A road petroleum asphalt to 200 °C and keep it warm;

[0093] S2. Add an extender to the petroleum asphalt that has been heated and kept warm, keep it warm and stir at a stirring speed of 1000 r / min until it is evenly stirred to ensure that the extender is fully integrated with the petroleum asphalt. The stirring time is 30 min.

[0094] S3. Then add a linear SBS modifier to the petroleum asphalt after integrating the extender. Control the molecular weight of SBS within 80,000 - 120,000, stir evenly, shear it twice through a colloid mill, then keep it warm at 185 °C and stir for 1 h to obtain modified asphalt.

[0095] S4. Heat 40 parts of water to 60 °C, keep it warm, add a surfactant and acrylate to the water, and stir evenly to obtain a soap solution.

[0096] S5. Add the modified asphalt to the soap solution, shear and integrate it through a colloid mill, add an SBS latex with a solid content of 40% and an SBR latex with a solid content of 65%, stir evenly to obtain modified emulsified asphalt, and cool it to room temperature or the use temperature for standby.

[0097] Example 3

[0098] This example provides a cold anti-skid and noise-reducing maintenance material for mountain tunnels, which includes the following components by weight: 12 parts of modified emulsified asphalt, 80 parts of basalt gravel, 7 parts of noise-reducing particles, and 5 parts of cement.

[0099] Among them, the noise-reducing particles include the following components by weight: 1 part of base oil, 30 parts of waste tire rubber powder with a mesh size of 40, 10 parts of star-shaped SBS modifier, and 10 parts of C9 petroleum resin. The preparation method of the noise-reducing particles includes the following steps:

[0100] S1. Heat the base oil to 200 °C and keep it warm.

[0101] S2. Add a star-shaped SBS modifier to the base oil that has been heated and kept warm, control the stirring rate at 500 r / min, stir until the star-shaped SBS modifier is fully dissolved, and the stirring time is 180 min to obtain an SBS modified elastomer.

[0102] S3. Heat the melted SBS modified elastomer to 220 °C.

[0103] S4. Slowly add waste tire rubber powder to the heated SBS modified elastomer while stirring. After the rubber powder is initially dissolved, continue to add until it is completed; then stir at 200 °C for 240 min. After the rubber powder is fully dissolved, keep it warm for standby.

[0104] S5. Add C9 petroleum resin while stirring until the C9 petroleum resin is completely dissolved to obtain an elastic colloid.

[0105] S6. Put the prepared elastic colloid into an extrusion granulator, extrude and granulate to obtain noise reduction particles with a particle size of 3 - 5 mm;

[0106] The modified emulsified asphalt comprises the following components by weight: 65 parts of 90A road petroleum asphalt, 20 parts of extender, 10 parts of linear SBS modifier, 5 parts of surfactant, 5 parts of barium sulfate, 40 parts of water, and also comprises SBS latex with a solid content of 40% and SBR latex with a solid content of 65%. And the dosage of the SBS latex is 10% of the total mass of the modified emulsified asphalt, and the dosage of the SBR latex is 6% of the total mass of the modified emulsified asphalt. The preparation method of the modified emulsified asphalt comprises the following steps:

[0107] S1. Heat the 90A road petroleum asphalt to 185 °C and keep it warm;

[0108] S2. Add the extender to the heated and warmed petroleum asphalt, keep it warm and stir at a stirring speed of 300 r / min, stir evenly to ensure that the extender is fully integrated with the petroleum asphalt, and the stirring time is 60 min;

[0109] S3. Then add the linear SBS modifier to the petroleum asphalt after fusing the extender, control the molecular weight of SBS at 80000 - 120000, stir evenly, shear twice through a colloid mill, and then keep it warm at 175 °C and stir for 5 h to obtain modified asphalt;

[0110] S4. Heat the water to 70 °C and keep it warm, add the surfactant and barium sulfate to the water, and stir evenly to obtain a soap solution;

[0111] S5. Add the modified asphalt to the soap solution, shear and fuse through a colloid mill, add SBS latex with a solid content of 40% and SBR latex with a solid content of 65%, stir evenly to obtain the modified emulsified asphalt, and cool it to room temperature or the using temperature for standby.

[0112] Example 4

[0113] This example provides a cold anti - skid and noise reduction maintenance material for mountain tunnels, which comprises the following components by weight: 10 parts of modified emulsified asphalt, 90 parts of basalt gravel, and 5 parts of noise reduction particles;

[0114] Among them, the noise reduction particles comprise the following components by weight: 10 parts of base oil, 50 parts of 40 - mesh waste tire rubber powder, 20 parts of star - shaped SBS modifier, and 20 parts of C9 petroleum resin. The preparation method of the noise reduction particles is the same as that in Example 1;

[0115] The modified emulsified asphalt comprises the following components by weight: 55 parts of 90A road petroleum asphalt, 6 parts of extender, 7 parts of linear SBS modifier, 3 parts of surfactant, 2 parts of barium sulfate, and also comprises SBS latex with a solid content of 40% and SBR latex with a solid content of 65%. Moreover, the dosage of the SBS latex is 9% of the total mass of the modified emulsified asphalt, and the dosage of the SBR latex is 5% of the total mass of the modified emulsified asphalt; the preparation method of the modified emulsified asphalt is the same as that of Example 1.

[0116] Example 5

[0117] This example provides an anti-skid and noise-reducing maintenance material, which comprises the following components by weight: 10 parts of modified emulsified asphalt, 90 parts of basalt gravel, 5 parts of noise-reducing particles, and 3 parts of cement;

[0118] Among them, the noise-reducing particles comprise the following components by weight: 10 parts of base oil, 50 parts of waste tire rubber powder with a mesh size of 40, 20 parts of star-shaped SBS modifier, and 20 parts of C9 petroleum resin; the preparation method of the noise-reducing particles is the same as that of Example 1;

[0119] The modified emulsified asphalt comprises the following components by weight: 55 parts of 90A road petroleum asphalt, 6 parts of extender, 7 parts of linear SBS modifier, 3 parts of surfactant, 2 parts of barium sulfate; the preparation method of the modified emulsified asphalt adopts the preparation method in Example 1, and the difference is only that the SBS latex with a solid content of 40% and the SBR latex with a solid content of 65% are not added in step S5.

[0120] Comparative Example 1

[0121] This comparative example provides an anti-skid and noise-reducing maintenance material, which comprises the following components by weight: 10 parts of modified emulsified asphalt, 90 parts of basalt gravel, 0 parts of noise-reducing particles, and 3 parts of cement;

[0122] Among them, the modified emulsified asphalt comprises the following components by weight: 55 parts of 90A road petroleum asphalt, 6 parts of extender, 7 parts of linear SBS modifier, 3 parts of surfactant, 2 parts of barium sulfate, and also comprises SBS latex with a solid content of 40% and SBR latex with a solid content of 65%. Moreover, the dosage of the SBS latex is 9% of the total mass of the modified emulsified asphalt, and the dosage of the SBR latex is 5% of the total mass of the modified emulsified asphalt; the preparation method of the modified emulsified asphalt is the same as that of Example 1.

[0123] Comparative Example 2

[0124] This comparative example provides an anti-skid and noise-reducing maintenance material, which comprises the following components by weight: 8 parts of modified emulsified asphalt, 90 parts of basalt gravel, 5 parts of noise-reducing particles, and 3 parts of cement;

[0125] Among them, the noise reduction particles include the following components by weight: 10 parts of base oil, 50 parts of waste tire rubber powder with a mesh size of 40, 20 parts of star-shaped SBS modifier, and 20 parts of C9 petroleum resin; the preparation method of the noise reduction particles is the same as that of Example 1;

[0126] The modified emulsified asphalt includes the following components by weight: 55 parts of 90A road petroleum asphalt, 6 parts of extender, 7 parts of linear SBS modifier, 3 parts of surfactant, 2 parts of barium sulfate, and also includes SBS latex with a solid content of 40% and SBR latex with a solid content of 65%. Moreover, the dosage of the SBS latex is 9% of the total mass of the modified emulsified asphalt, and the dosage of the SBR latex is 5% of the total mass of the modified emulsified asphalt; the preparation method of the modified emulsified asphalt is the same as that of Example 1.

[0127] Comparative Example 3

[0128] This embodiment provides an anti-skid and noise reduction maintenance material, which includes the following components by weight: 20 parts of modified emulsified asphalt, 80 parts of basalt gravel, 5 parts of noise reduction particles, and 3 parts of cement;

[0129] Among them, the noise reduction particles include the following components by weight: 10 parts of base oil, 50 parts of waste tire rubber powder with a mesh size of 40, 20 parts of star-shaped SBS modifier, and 20 parts of C9 petroleum resin; the preparation method of the noise reduction particles is the same as that of Example 1;

[0130] The modified emulsified asphalt includes the following components by weight: 55 parts of 90A road petroleum asphalt, 6 parts of extender, 7 parts of linear SBS modifier, 3 parts of surfactant, 2 parts of barium sulfate, and also includes SBS latex with a solid content of 40% and SBR latex with a solid content of 65%. Moreover, the dosage of the SBS latex is 9% of the total mass of the modified emulsified asphalt, and the dosage of the SBR latex is 5% of the total mass of the modified emulsified asphalt; the preparation method of the modified emulsified asphalt is the same as that of Example 1.

[0131] The performance of the anti-skid and noise-reducing maintenance materials of Example 1, Example 2, Example 3, Example 4, Example 5, Comparative Example 1, Comparative Example 2, and Comparative Example 3 was tested in the laboratory respectively. The specific method is as follows: 1) Prepare a piece of tarpaulin first and measure its area; 2) Mix the designed weight portions of basalt gravel, noise-reducing particles, and cement to obtain a mixture, and heat the designed weight portion of modified emulsified asphalt to 55 °C to obtain asphalt material; 3) According to the known area of the tarpaulin, first spread the asphalt material, and then spread the mixture to complete the production of the anti-skid and noise-reducing material; 4) Slightly tamp the basalt gravel and noise-reducing particles with a small rammer; 5) Cure in the same natural environment until the anti-skid and noise-reducing material is completely formed; 6) Place the anti-skid and noise-reducing material under the experimental wheel roller and roll back and forth 48 times for secondary forming; 7) Test indexes such as pendulum friction coefficient, texture depth, water permeability coefficient, noise, and forming time. Among them, the pendulum friction coefficient, texture depth, and water permeability coefficient of the anti-skid and noise-reducing maintenance materials refer to the methods recorded in JTGE20-2011 "Test Procedures for Asphalt and Asphalt Mixtures in Highway Engineering" and JTG3450-2019 "Field Test Procedures for Highway Subgrade and Pavement"; the noise detection refers to "Handheld Noise Spectrum Analyzer" T0986-2019. The performance test results of the anti-skid and noise-reducing maintenance materials of Example 1, Example 2, Example 3, Example 4, Example 5, Comparative Example 1, Comparative Example 2, and Comparative Example 3 are shown in Table 1.

[0132] Table 1 Performance Test Results of Anti-Skid and Noise-Reducing Maintenance Materials

[0133] Test Items Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example 1 Comparative Example 2 Comparative Example 3 Pendulum Friction Coefficient (BPN) 74 65 70 75 76 74 75 58 Texture Depth (mm) 1.1 0.7 0.8 1.2 1.1 1.2 1.2 0.48 Permeability Coefficient (ml / min) 0 0 0 0 0 0 100 0 Noise (dB) 60 60 62 64 63 64 64 60 Molding Duration (h) 2 2 1.5 3 2 2 2 2

[0134] As can be seen from Table 1, using the anti-skid and noise-reducing maintenance material of the present invention can significantly increase the pendulum friction coefficient of the road surface to 65-76 BPN, the texture depth to 0.7-1.2 mm, and the driving noise to 60-64 dB, improving driving safety and comfort. Comparing Example 1 and Comparative Example 1, it can be seen that the anti-skid and noise-reducing maintenance material of the present invention adds noise-reducing particles and can significantly reduce noise; comparing Example 1, Comparative Example 2, and Comparative Example 3, the anti-skid and noise-reducing maintenance material of the present invention uses a certain amount of modified emulsified asphalt and basalt gravel, which can significantly increase the water permeability coefficient, ensure the anti-water damage performance of the road surface, and at the same time ensure sufficient anti-skid effect and the anti-skid durability of the road surface.

[0135] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A cold anti-slip and noise-reducing maintenance material for mountain tunnels, characterized in that, It includes the following components by weight parts: 10-15 parts of modified emulsified asphalt, 70-90 parts of crushed stone, 5-15 parts of noise reduction particles, and 0-5 parts of inorganic powder materials.

2. The cold anti-slip and noise-reducing maintenance material for mountain tunnels according to claim 1, wherein: The inorganic powder material is cement or mineral powder; the crushed stone is one or more of basalt crushed stone, diabase crushed stone, and emery, with a particle size of 3-8 mm; the particle size of the noise reduction particles is 3-5 mm.

3. The cold anti-slip and noise-reducing maintenance material for mountain tunnels according to claim 1, characterized in that, The noise reduction particles include the following components by weight parts: 1-20 parts of raw material oil, 30-90 parts of waste tire rubber powder, 10-30 parts of SBS modifier, and 10-30 parts of petroleum resin.

4. The cold anti-skid and noise-reducing maintenance material for mountain tunnels according to claim 3, characterized in that: The raw material oil is base oil or white oil; the particle size of the waste tire rubber powder is ≤1 mm; the SBS modifier is one or more of star-shaped SBS modifier and linear SBS modifier; the petroleum resin is C9 petroleum resin, C5 petroleum resin, or C5 / C9 blended petroleum resin.

5. The cold anti-slip and noise-reducing maintenance material for mountain tunnels according to claim 3 or 4, characterized in that, The preparation method of the noise reduction particles includes the following steps: S1. Heat the raw material oil to 180-200 °C and keep it warm. S2. Add the SBS modifier and stir until the SBS modifier is fully dissolved to obtain an SBS modified elastomer. S3. Heat the SBS modified elastomer to 200-250 °C. S4. Slowly add the waste tire rubber powder, stirring while adding. After the rubber powder is initially dissolved, continue to add until completion, and then stir at 180-200 °C until the rubber powder is fully dissolved. S5. Add the petroleum resin, stirring while adding until it is completely dissolved to obtain an elastic colloid. S6. Put the elastic colloid into an extrusion granulator, extrude and granulate to obtain noise reduction particles.

6. The cold anti-slip and noise-reducing maintenance material for mountain tunnels according to claim 1, wherein: The modified emulsified asphalt includes the following components by weight parts: 50-65 parts of petroleum asphalt, 2-10 parts of extender, 2-10 parts of linear SBS modifier, 1-5 parts of surfactant, 1-5 parts of stabilizer, and 30-40 parts of water.

7. The cold anti-slip and noise-reducing maintenance material for mountain tunnels according to claim 6, characterized in that, The preparation method of the modified emulsified asphalt includes the following steps: S1. Heat the petroleum asphalt to 170-200 °C and keep it warm. S2. Add the extender and stir evenly. S3. Then add the linear SBS modifier, stir evenly, shear through a colloid mill 2-3 times, and then keep it warm at 175-185 °C and stir for 1 h-5 h to obtain modified asphalt. S4. Heat the water to 60-70 °C, keep it warm, add the surfactant and stabilizer, and stir evenly to obtain a soap solution. S5. Add the modified asphalt to the soap solution and shear and fuse through a colloid mill to obtain modified emulsified asphalt.

8. The cold anti-skid and noise-reducing maintenance material for mountain tunnels according to claim 6, characterized in that: The modified emulsified asphalt also includes SBS latex with a solid content of 40% and SBR latex with a solid content of 65%. The dosage of the SBS latex is 8-10% of the total mass of the modified emulsified asphalt, and the dosage of the SBR latex is 4-6% of the total mass of the modified emulsified asphalt.

9. Application of the cold anti-slip and noise-reducing maintenance material for mountain tunnels according to any one of claims 1-8, characterized in that: First, mix the crushed stone, noise reduction particles, and inorganic powder materials evenly to obtain a mixture. Heat the modified emulsified asphalt to 50-60 °C to obtain an asphalt material, and then evenly spray the asphalt material and the mixture onto the road surface in sequence. After that, perform curing and rolling to form a wearing course on the road surface.

10. The application according to claim 9, wherein: The thickness of the wearing course is 4-10 mm.