Road disease repairing material and repairing method

Abstract

The invention relates to the field of road engineering materials, and particularly discloses a road disease repairing material and method, the repairing material comprises the following raw materials: SBS modified asphalt, waste rubber powder, a tackifier, a composite fiber stabilizer, a mineral filler and a reinforcing filler; wherein the tackifier is selected from epoxy acrylate resin, and the composite fiber stabilizer comprises hydroxypropyl methyl cellulose and a modified microcrystalline cellulose / talcum powder compound; the modified microcrystalline cellulose / talcum powder compound is prepared by the following steps: treating talcum powder with gamma-methacryloxypropyltrimethoxysilane and 3-allyloxy-2-hydroxy-1-sodium propane sulfonate, mixing the treated talcum powder with microcrystalline cellulose, and reacting the mixture with terephthalic acid and glycine; the repairing method comprises the following steps that redundant crushed aggregates are removed; sticking layer oil is smeared, and then the repairing material is mixed and paved in the pit slot; the road surface repairing method has the characteristic of prolonging the service life of the repaired road surface.

Description

Technical Field

[0001] This application relates to the field of road engineering materials, and more specifically, it relates to a highway disease repair material and a repair method. Background Art

[0002] As an important infrastructure for modern transportation, the quality and durability of highways are directly related to the safety and efficiency of transportation. However, under the influence of various factors such as long-term heavy traffic, natural environment erosion, and improper maintenance, various diseases such as cracks, potholes, and ruts are inevitable on highways. These diseases not only affect the service performance of highways but also may cause traffic accidents, posing a threat to the safety of people's lives and property.

[0003] Among them, the pothole disease is one of the most prominent forms of asphalt pavement damage. The pothole disease not only seriously affects the road performance and driving comfort of asphalt pavements but also poses the most direct threat to vehicle driving safety. Especially in the southern rainy season and after the spring freeze-thaw in the north, asphalt pavement potholes will break out intensively, bringing huge challenges to road maintenance work. Therefore, the research and development of efficient, rapid, and economical highway disease repair materials are of great significance for improving highway maintenance efficiency, extending highway service life, and ensuring traffic safety.

[0004] At present, the commonly used pothole repair methods mainly include the hot paving process using hot mix asphalt mixture and the cold paving process using cold mix asphalt mixture. Among them, hot mix asphalt will cause large energy consumption and environmental pollution problems, and the high temperature will cause asphalt aging, greatly reducing the effect. The cold patch asphalt has the characteristics of simple and convenient operation, can be repaired even in rainy or snowy days, and the traffic can be opened quickly after repair, and is widely used in highway repair. However, compared with hot mix asphalt, the strength of cold mix asphalt is lower, and the road surface is prone to damage under high-strength or high-load conditions, requiring frequent maintenance; moreover, the asphalt content in cold mix asphalt is less, its bonding force is poor, it cannot effectively wrap the aggregate, forming a weak interface, thereby reducing the overall strength and stability of the mixture, leading to stress concentration and crack propagation, and then the road surface is prone to problems such as cracking, affecting the service life of the road. The above problems result in a short service life after repair.

[0005] Therefore, it is necessary to further research and develop the current cold patch asphalt for repairing diseases such as potholes, and it is crucial to develop a repair material that can improve the service life of the road surface after repair. Summary of the Invention

[0006] In order to improve the service life of the road surface after repair, this application provides a highway disease repair material and a repair method.

[0007] In the first aspect, this application provides a highway disease repair material, adopting the following technical scheme: A highway disease repair material, comprising the following raw materials in parts by weight: 10-20 parts of SBS modified asphalt, 5-10 parts of waste rubber powder, 5-15 parts of tackifier, 3-8 parts of composite fiber stabilizer, 50-80 parts of mineral filler, 5-10 parts of reinforcing filler; Among them, the tackifier is selected from epoxy acrylate resin, and the composite fiber stabilizer comprises hydroxypropyl methyl cellulose and a modified microcrystalline cellulose / talc powder complex with a mass ratio of 1:(1.5-2); The modified microcrystalline cellulose / talc powder complex is prepared by first treating talc powder with γ-methacryloxypropyltrimethoxysilane and 3-allyloxy-2-hydroxy-1-propanesulfonic acid sodium salt to obtain pretreated talc powder, mixing the pretreated talc powder with microcrystalline cellulose, and then reacting with terephthalic acid and glycine.

[0008] By adopting the above technical solution, in this application, SBS modified asphalt is used as the asphalt matrix, and in combination with mineral filler to form an asphalt repair material. The addition of waste rubber powder can improve the flexibility and fatigue resistance of the repair material. Moreover, as an elastomer, the rubber powder can form a three-dimensional network structure in the asphalt, playing a certain role in skeleton support, thereby improving the overall strength of the repair material. The mineral filler can fill the pores in the repair material, improve the density, and thus enhance the strength and stability of the overall repair material. The nano-filler significantly improves the mechanical properties and durability of the mixture. The tackifier is selected from epoxy acrylate resin, which significantly improves the adhesion between the asphalt and the filler, thereby improving the cementing performance of the repair material and reducing the cracking phenomenon. Hydroxypropyl methyl cellulose in the composite fiber stabilizer can significantly improve the adhesion between the repair material and the highway base layer and the adhesion between the asphalt matrix and the filler as an adhesive. The addition of the modified microcrystalline cellulose / talc powder complex can not only improve the mechanical properties but also improve the adhesion and compatibility with the collective materials such as asphalt. Finally, it significantly improves the strength and adhesion of the repair material, and has a longer service life.

[0009] The modified microcrystalline cellulose / talc composite is prepared by compounding modified talc with modified microcrystalline cellulose. First, talc is treated with γ-methacryloxypropyltrimethoxysilane and sodium 3-allyloxy-2-hydroxy-1-propanesulfonate. The trimethoxysilyl group in γ-methacryloxypropyltrimethoxysilane reacts with the hydroxyl groups on the surface of talc particles, introducing methacryloxy groups onto the surface of talc particles. The unsaturated double bonds in the methacryloxy groups can polymerize with the unsaturated double bonds in sodium 3-allyloxy-2-hydroxy-1-propanesulfonate. Moreover, the sulfonic acid group in sodium 3-allyloxy-2-hydroxy-1-propanesulfonate can intercalate and modify talc, achieving the modified pretreatment of talc. Then, it is mixed with microcrystalline cellulose and reacted with terephthalic acid and glycine. The carboxyl functional groups in the above reactants react with the hydroxyl groups in microcrystalline cellulose, talc, and the introduced macromolecules on talc to form ester groups, and benzene ring groups are also introduced. Moreover, the amino group in glycine can also form a chemical interaction with the hydroxyl group, finally forming a polymer network, thus significantly improving the compatibility with the asphalt matrix. More importantly, it improves the interfacial bonding force between the asphalt matrix and the filler. Finally, the prepared repair material has higher mechanical properties and bonding strength, ultimately enhancing the service life of the repair material.

[0010] Optionally, the modified microcrystalline cellulose / talc composite is prepared by the following method: 1), Mix γ-methacryloxypropyltrimethoxysilane with absolute ethanol and adjust the pH to 4-5 to obtain a silanol solution; 2), Then immerse talc in the prepared silanol solution. The immersion temperature is 50-60 °C, and the immersion time is 2-3 h. Then filter, wash with alcohol, and dry to obtain modified talc; 3), Dissolve sodium 3-allyloxy-2-hydroxy-1-propanesulfonate in water to obtain a modified solution. Then add the modified talc and disperse it by ultrasonic treatment. Then add an initiator and react at 65-75 °C for 1-2 h. Then centrifuge and wash with water and dry to obtain pretreated talc; 4), Alkaline wash microcrystalline cellulose, then wash with water and dry to obtain activated microcrystalline cellulose. Mix the activated microcrystalline cellulose with the pretreated talc and ball mill to obtain a mixture; 5), Dissolve terephthalic acid and glycine in N,N-dimethylacetamide to obtain a mixed solution. Then add the mixture, stir, add an acid catalyst, and reflux and react at 120-130 °C for 4-6 h. After the reaction is completed, wash with water and then vacuum dry to obtain the modified microcrystalline cellulose / talc composite.

[0011] By adopting the above technical solutions, in this application, first, talcum powder is impregnated in a silanol solution, so that silanol acts on the hydroxyl groups on the talcum powder to introduce methacryloxy groups. Then, under the action of an initiator, allyl groups copolymerize and graft with the silane double bonds on the surface of the talcum powder, introducing methacrylate groups, hydroxyl groups, and sulfonic acid groups on the surface of the talcum powder to obtain pretreated talcum powder. After the microcrystalline cellulose is washed with alkali, the reactivity of the hydroxyl groups on the surface of the microcrystalline cellulose is enhanced. Then, after drying, it is mixed and ball-milled with the pretreated talcum powder. Then, in the reaction solution of terephthalic acid and glycine, under the action of a catalyst, the carboxyl groups and amino groups in the above reaction solution can act on the hydroxyl groups in the pretreated talcum powder and microcrystalline cellulose, and the carboxyl group can also act on the sulfonic acid groups on the surface of the pretreated talcum powder to form a three-dimensional crosslinked network, thereby significantly improving its strength and mechanical properties. Moreover, the hydrophobic surface of the modified composite can improve the resistance to water erosion and enhance its durability. Moreover, the introduction of its benzene ring improves the compatibility with the asphalt matrix and enhances the adhesiveness between the asphalt and the filler, thereby increasing its service life.

[0012] Optionally, in the preparation process of the modified microcrystalline cellulose / talcum powder composite, the volume ratio of γ-methacryloxypropyltrimethoxysilane to anhydrous ethanol added in step 1) is 1:(6 - 8); In step 2), the mass ratio of talcum powder to the silanol solution added is 1:(5 - 6); In step 3), the mass concentration of sodium 3-allyloxy-2-hydroxy-1-propane sulfonate in the modification solution is 10 - 15 wt%, and the mass ratio of sodium 3-allyloxy-2-hydroxy-1-propane sulfonate to the modified talcum powder added is 1:(4 - 5), and the addition amount of the initiator is 0.5 - 1 wt% of the modified talcum powder; In step 4), the mass ratio of the activated microcrystalline cellulose to the pretreated talcum powder added is 1:(1.8 - 2.5); In step 5), the mass ratio of terephthalic acid to glycine added is 1:(0.5 - 0.8), and the mass ratio of terephthalic acid to water added is 1:(6 - 8), the addition amount of the acid catalyst is 1 - 2 wt% of the addition amount of terephthalic acid, and the mass ratio of terephthalic acid to the mixture added is 1:(3 - 4).

[0013] By adopting the above technical solutions, the final performance of the modified microcrystalline cellulose / talcum powder composite prepared with the above addition amounts is better when added to the repair material.

[0014] Optionally, the mineral filler includes cement, stone powder, crushed stone, and sand with a mass ratio of 1:(2 - 3):(10 - 12):(6 - 8).

[0015] By adopting the above technical solutions, materials such as stone powder and cement can absorb the micro-pores in asphalt, improve plasticity, and better adapt to external environmental influences such as road deformation and vibration. Moreover, it is found that the addition of cement can also make up for the early strength of the repair material of the present application.

[0016] Optionally, the reinforcing filler is prepared by loading nano-silica on a modified porous carrier, and the modified porous carrier is obtained by modifying a porous-based gasification slag / waste rubber powder composite with cetyltrimethylammonium chloride.

[0017] By adopting the above technical solutions, in the present application, the reinforcing filler is prepared by loading nano-silica on a modified porous carrier. On the one hand, the addition of nano-silica utilizes the specific surface area of the nano-material to regulate the interfacial properties. Moreover, the hydroxyl groups on the surface of nano-silica can form chemical interactions with functional groups such as carboxyl groups and amino groups on the composite fiber stabilizer. The benzene ring on the composite fiber stabilizer can form conjugated chemical bonds with aromatic hydrocarbons in the modified asphalt. After nano-silica is loaded on the porous carrier, a porous adsorption structure is formed, and hydrogen bonds and van der Waals forces can also be formed between the surface hydroxyl groups and asphalt molecules. Finally, in the system of the present application, the adhesion between asphalt and filler is improved. The porous carrier is prepared from a gasification slag / waste rubber powder composite. In this way, while the porous carrier provides a carrier function, the gasification slag provides strength and the waste rubber powder provides toughness, thereby improving the strength and toughness of the repair material, having better mechanical properties and anti-deformation properties, and increasing its lifespan. The modification of the porous-based gasification slag / waste rubber powder composite with cetyltrimethylammonium chloride makes the surface of the gasification slag carry a positive charge, so that it can generate electrostatic adsorption with negatively charged asphalt. Finally, the addition of the reinforcing filler in the present application can not only increase strength but also improve toughness. More importantly, it forms interactions with asphalt, filler, and composite fiber stabilizer to improve the bonding force, and finally the prepared repair material has better durability.

[0018] Optionally, the porous-based gasification slag / waste rubber powder composite is prepared by the following method: Mix the gasification slag and waste rubber powder to obtain a mixed powder, then mix the mixed powder with water, disperse it ultrasonically, add hydroxyethyl cellulose and mix, then add a polyurethane prepolymer and mix, stir and foam, stand and solidify, and then air-dry to obtain the porous-based gasification slag / waste rubber powder composite.

[0019] By adopting the above technical solutions, in the present application, during the stirring process of the polyurethane prepolymer and water, the isocyanate groups in the polyurethane prepolymer react with water to generate carbon dioxide gas to form bubbles, which are uniformly distributed in the mixed solution to form a porous structure. Combining with the rich pore structure of the gasification slag itself, a porous carrier with a rich pore structure is formed, realizing the formation of a porous adsorption structure after loading nano-silica, realizing the close interaction between asphalt and filler, and improving mechanical properties and stability.

[0020] Optionally, during the preparation of the porous base gasification slag / waste rubber powder composite, the added mass ratio of gasification slag to waste rubber powder is 1:(0.4 - 0.5), the added mass ratio of the mixed powder to water is 1:(6 - 8), the addition amount of hydroxyethyl cellulose is 1 - 3 wt% of the added amount of the mixed powder, and the added mass ratio of polyurethane prepolymer to the mixed powder is 1:(3 - 5).

[0021] By adopting the above technical solution, through the addition ratio of gasification slag to waste rubber powder, the comprehensive properties of strength and toughness of the final repair material are better, with higher strength and better anti-deformation performance, and ultimately better durability. The addition of hydroxyethyl cellulose plays a certain role in preventing sedimentation and helps the dispersion of the mixed powder in water.

[0022] Optionally, the reinforcing filler is prepared by the following method: After mixing and dissolving cetyltrimethylammonium chloride and water according to a mass ratio of 1:(4 - 6), the porous base gasification slag / waste rubber powder composite is added, and the added mass ratio of the porous base gasification slag / waste rubber powder composite to cetyltrimethylammonium chloride is 1:(0.2 - 0.3). It is impregnated for 40 - 60 min at an impregnation temperature of 30 - 40 °C. After impregnation, it is filtered and dried to obtain a modified porous carrier; Disperse nano-silica in ethanol, and the added mass ratio of nano-silica to ethanol is 1:(4 - 5). Polyethylene glycol is added, and after ultrasonic treatment, a suspension is obtained. Then the modified porous carrier is added to the suspension and impregnated under pressure. The impregnation pressure is 0.5 - 0.8 MPa. After impregnation for 30 - 50 min, it is first dried at 50 - 60 °C for 1.5 - 2.5 h, and then heated to 120 - 130 °C for treatment for 3 - 4 h to obtain the reinforcing filler. Among them, the addition amount of polyethylene glycol is 3 - 5 wt% of the added amount of nano-silica, and the added mass ratio of the modified porous carrier to nano-silica is 1:(0.4 - 0.6).

[0023] Optionally, when preparing the reinforcing filler, after the modified porous carrier is impregnated under pressure in the suspension and dried, it is also impregnated in a silane coupling agent solution and then dried to obtain the reinforcing filler.

[0024] By adopting the above technical solution, after loading nano-silica on the modified porous carrier and then treating it with a silane coupling agent, the nano-silica and the porous carrier are bonded through siloxane bonds, improving its loading fastness.

[0025] Optionally, the repair material is prepared by the following method: Mix the mineral filler, reinforcing filler, and composite fiber stabilizer, and then add waste rubber powder to obtain a preliminary mixture by mixing; Mix the SBS modified asphalt with the tackifier and then add it to the premix and stir to obtain the repair material.

[0026] In a second aspect, the present application provides a method for repairing highway diseases, adopting the following technical solution: A method for repairing highway diseases includes the following steps: S1. Remove the excess debris in the pothole; S2. Apply tack coat oil around the inner wall and bottom of the pothole, and then mix and spread the repair material in the pothole; S3. Roll and level the highway pavement.

[0027] By adopting the above technical solution, the repair method in the present application can quickly repair the pothole diseases of the highway. Light vehicles can pass after 1 hour, reducing traffic impact. Moreover, its strength and anti-deformation performance are better, and its service life is longer, alleviating the current easy-to-occur cracking phenomenon.

[0028] In summary, the present application has the following beneficial effects: 1. In the present application, hydroxypropyl methylcellulose in the composite fiber stabilizer can significantly improve the adhesion between the repair material and the highway base course and the adhesion between the asphalt matrix and the filler as an adhesive. The addition of the modified microcrystalline cellulose / talc composite can not only improve the mechanical properties but also improve the adhesion and the compatibility with collective materials such as asphalt. Finally, it significantly improves the strength and adhesion of the repair material and has a longer service life; 2. In the present application, the reinforcing filler is prepared by loading nano-silica on a modified porous carrier. On the one hand, the addition of nano-silica utilizes the specific surface area of the nano-material to regulate the interfacial properties. Moreover, the hydroxyl groups on the surface of nano-silica can form chemical interactions with functional groups such as carboxyl groups and amino groups on the composite fiber stabilizer. The benzene ring on the composite fiber stabilizer can form conjugated chemical bonds with the aromatic hydrocarbons in the modified asphalt. And after nano-silica is loaded on the porous carrier, a porous adsorption structure is formed, and hydrogen bonds and van der Waals forces can also be formed between the surface hydroxyl groups and asphalt molecules. Finally, in the system of the present application, the adhesion between asphalt and filler is improved. Moreover, the porous carrier is prepared from a gasification slag / waste rubber powder composite system. In this way, while the porous carrier provides a carrier function, the gasification slag provides strength and the waste rubber powder provides toughness, thereby improving the strength and toughness of the repair material, having better mechanical properties and anti-deformation performance, and increasing its service life. Specific Embodiments

[0029] The following further elaborates on the present application in combination with embodiments. It should be specifically noted that: for those not indicating specific conditions in the following embodiments, they are carried out according to conventional conditions or conditions recommended by the manufacturer. All raw materials used in the following embodiments can be obtained from ordinary commercial sources unless otherwise specified.

[0030] In the following examples, the SBS modified asphalt is the Degjia No. 70 SBS modified asphalt sold by Xingtai Degjia Road Materials Sales Co., Ltd.; The epoxy acrylate resin is the epoxy acrylate resin of Langfang Fuchen New Materials Co., Ltd.; The polyurethane prepolymer is the polyurethane prepolymer with the brand of Yamaide from Hubei Yamaide Biopharmaceutical Co., Ltd., and the NCO is 7.8%; The cement is P.O42.5 ordinary Portland cement, the stone powder is the stone powder with a particle size of 200 - 400 mesh formed after grinding stones; the crushed stone is the crushed stone with a continuous particle size of 5 - 20 mm; the sand is the quartz sand with a particle size of 1 - 3 mm.

[0031] The following preparation example is the preparation example of microcrystalline cellulose / talc composite Preparation Example 1 A preparation method of microcrystalline cellulose / talc composite, comprising the following steps: 1), Mix γ - methacryloyloxypropyltrimethoxysilane and absolute ethanol according to a volume ratio of 1:7, and then adjust the pH to 4.5 to obtain a silanol solution; 2), Then immerse talc in the obtained silanol solution, the added mass ratio of talc to silanol solution is 1:5.5, the immersion temperature is 55 °C, the immersion time is 2.5 h, then filter and wash with alcohol, and dry to obtain modified talc; 3), Dissolve sodium 3 - allyloxy - 2 - hydroxy - 1 - propane sulfonate in water to obtain a modified solution, the mass concentration of sodium 3 - allyloxy - 2 - hydroxy - 1 - propane sulfonate in the modified solution is 12 wt%, then add the modified talc and disperse it by ultrasonic wave, then add the initiator ammonium persulfate and react at 70 °C for 1.5 h, then centrifuge and wash with water, and dry to obtain pretreated talc; Wherein, the added mass ratio of sodium 3 - allyloxy - 2 - hydroxy - 1 - propane sulfonate to the modified talc is 1:4.5, and the addition amount of the initiator is 0.8 wt% of the modified talc; 4), Alkaline wash microcrystalline cellulose in a sodium hydroxide solution with a mass concentration of 10 wt%, the sodium hydroxide solution is 4 times the mass of microcrystalline cellulose, then wash with water and dry to obtain activated microcrystalline cellulose, mix the activated microcrystalline cellulose and the pretreated talc according to a mass ratio of 1:2 and ball - mill to obtain a mixture; 5), Mix terephthalic acid and glycine in a mass ratio of 1:0.6, then mix with water to obtain a mixed solution. The added mass ratio of terephthalic acid to water is 1:7. Then add a mixture to the mixed solution, and the added mass ratio of terephthalic acid to the mixture is 1:3.5. After stirring, add a hydrochloric acid catalyst with a mass concentration of 40%. The addition amount of the hydrochloric acid catalyst is 1.5 wt% of the addition amount of terephthalic acid. Carry out reflux reaction at 125 °C for 5 h. After the reaction is completed, wash with water and then vacuum dry to obtain a modified microcrystalline cellulose / talc composite.

[0032] Preparation Example 2 A method for preparing a microcrystalline cellulose / talc composite, comprising the following steps: 1), Mix γ-methacryloxypropyltrimethoxysilane and absolute ethanol in a volume ratio of 1:6, and then adjust the pH to 4 to obtain a silanol solution; 2), Then impregnate talc in the obtained silanol solution. The added mass ratio of talc to the silanol solution is 1:5. The impregnation temperature is 50 °C and the impregnation time is 3 h. Then filter and wash with alcohol and dry to obtain modified talc; 3), Dissolve sodium 3-allyloxy-2-hydroxy-1-propanesulfonate in water to obtain a modified solution. The mass concentration of sodium 3-allyloxy-2-hydroxy-1-propanesulfonate in the modified solution is 10 wt%. Then add the modified talc and disperse it by ultrasonic wave. Then add ammonium persulfate as an initiator and react at 65 °C for 2 h. Then carry out centrifugal separation, wash with water and dry to obtain pretreated talc; Among them, the added mass ratio of sodium 3-allyloxy-2-hydroxy-1-propanesulfonate to the modified talc is 1:4, and the addition amount of the initiator is 0.5 wt% of the modified talc; 4), Carry out alkali washing of microcrystalline cellulose in a sodium hydroxide solution with a mass concentration of 10 wt%. The sodium hydroxide solution is 3 times the mass of microcrystalline cellulose. Then wash with water and dry to obtain activated microcrystalline cellulose. Mix the activated microcrystalline cellulose and the pretreated talc in a mass ratio of 1:1.8 and then ball mill to obtain a mixture; 5), Mix terephthalic acid and glycine in a mass ratio of 1:0.5, then mix with water to obtain a mixed solution. The added mass ratio of terephthalic acid to water is 1:6. Then add the mixture to the mixed solution, and the added mass ratio of terephthalic acid to the mixture is 1:3. After stirring, add a hydrochloric acid catalyst with a mass concentration of 40%. The addition amount of the hydrochloric acid catalyst is 1 wt% of the addition amount of terephthalic acid. Carry out reflux reaction at 120 °C for 6 h. After the reaction is completed, wash with water and then vacuum dry to obtain a modified microcrystalline cellulose / talc composite.

[0033] Preparation Example 3 A method for preparing a microcrystalline cellulose / talc composite, comprising the following steps: 1), Mix γ-methacryloxypropyltrimethoxysilane and absolute ethanol according to a volume ratio of 1:8, and then adjust the pH to 5 to obtain a silanol solution; 2), Then immerse talc in the prepared silanol solution. The added mass ratio of talc to the silanol solution is 1:6, the immersion temperature is 60 °C, and the immersion time is 2 h. Then filter and wash with alcohol, and dry to obtain modified talc; 3), Dissolve sodium 3-allyloxy-2-hydroxy-1-propane sulfonate in water to obtain a modified solution. The mass concentration of sodium 3-allyloxy-2-hydroxy-1-propane sulfonate in the modified solution is 15 wt%. Then add the modified talc and disperse it by ultrasonic wave. Then add ammonium persulfate as an initiator and react at 75 °C for 1 h. Then centrifuge and wash with water, and dry to obtain pretreated talc; Among them, the added mass ratio of sodium 3-allyloxy-2-hydroxy-1-propane sulfonate to the modified talc is 1:5, and the addition amount of the initiator is 1 wt% of the modified talc; 4), Alkaline wash microcrystalline cellulose in a sodium hydroxide solution with a mass concentration of 10 wt%. The sodium hydroxide solution is 5 times the mass of microcrystalline cellulose. Then wash with water and dry to obtain activated microcrystalline cellulose. Mix the activated microcrystalline cellulose and the pretreated talc according to a mass ratio of 1:2.5 and ball mill to obtain a mixture; 5), Mix terephthalic acid and glycine according to a mass ratio of 1:0.8, and then mix with water to obtain a mixed solution. The added mass ratio of terephthalic acid to water is 1:8. Then add the mixture to the mixed solution. The added mass ratio of terephthalic acid to the mixture is 1:4. After stirring, add a hydrochloric acid catalyst with a mass concentration of 40%. The addition amount of the hydrochloric acid catalyst is 2 wt% of the addition amount of terephthalic acid. Reflux and react at 130 °C for 4 h. After the reaction is completed, wash with water and then dry under vacuum to obtain a modified microcrystalline cellulose / talc composite.

[0034] Comparative Preparation Example 1 A method for preparing a microcrystalline cellulose / talc composite is carried out according to the method in Preparation Example 1, except that in step 5), glycine is replaced with terephthalic acid in equal amount.

[0035] Comparative Preparation Example 2 A method for preparing a microcrystalline cellulose / talc composite is carried out according to the method in Preparation Example 1, except that step 3) is not carried out. In step 4), the activated microcrystalline cellulose is directly mixed with the modified talc prepared in step 2) and ball milled to obtain a mixture.

[0036] Example 1 A preparation method of a highway disease repair material, comprising the following steps: After mixing 65 kg of mineral filler, 8 kg of reinforcing filler, and 5 kg of composite fiber stabilizer, add 8 kg of waste rubber powder and mix to obtain a preliminary mixture; After mixing 15 kg of SBS modified asphalt and 10 kg of tackifier, add them to the preliminary mixture and stir to obtain the repair material.

[0037] Among them, the mineral filler includes cement, stone powder, crushed stone, and sand with a mass ratio of 1:2.5:11:7; the tackifier is selected as epoxy acrylate resin, and the composite fiber stabilizer includes a mixture of hydroxypropyl methyl cellulose and the modified microcrystalline cellulose / talc powder composite prepared in Preparation Example 1 with a mass ratio of 1:1.8; The reinforcing filler is prepared by the following method: Step 1: Prepare a porous base gasification slag / waste rubber powder composite: Mix gasification slag and waste rubber powder according to a mass ratio of 1:0.4 to obtain a mixed powder, then mix the mixed powder with water according to a mass ratio of 1:7, perform ultrasonic dispersion, add hydroxyethyl cellulose and mix, the addition amount of hydroxyethyl cellulose is 2 wt% of the addition amount of the mixed powder, then add polyurethane prepolymer and mix, the addition mass ratio of polyurethane prepolymer to the mixed powder is 1:4, stir and foam, stand for 24 h to solidify and then air-dry to obtain a porous base gasification slag / waste rubber powder composite; Step 2: Prepare a modified porous carrier: After dissolving cetyltrimethylammonium chloride and water according to a mass ratio of 1:5, add the porous base gasification slag / waste rubber powder composite prepared in Step 1, the addition mass ratio of the porous base gasification slag / waste rubber powder composite to cetyltrimethylammonium chloride is 1:0.2, impregnate for 50 min, the impregnation temperature is 35 °C, and after impregnation, filter and dry to obtain a modified porous carrier; Step 3: Disperse nano-silica in ethanol, and the addition mass ratio of nano-silica to ethanol is 1:4.5, add polyethylene glycol, perform ultrasonic treatment to obtain a suspension, then add the modified porous carrier prepared in Step 2 to the suspension, perform pressure impregnation, the impregnation pressure is 0.6 MPa, after impregnating for 40 min, first dry at 55 °C for 2 h, and then heat to 125 °C and treat for 3.5 h to obtain the reinforcing filler, wherein the addition amount of polyethylene glycol is 4 wt% of the addition amount of nano-silica, and the addition mass ratio of the modified porous carrier to nano-silica is 1:0.5.

[0038] Example 2 A preparation method of a highway disease repair material, comprising the following steps: After mixing 50 kg of mineral filler, 5 kg of reinforcing filler, and 3 kg of composite fiber stabilizer, add 5 kg of waste rubber powder and mix to obtain a preliminary mixture; Mix 10 kg of SBS modified asphalt with 5 kg of tackifier and add the mixture to the premix for stirring and mixing to obtain the repair material.

[0039] Among them, the mineral filler includes cement, stone powder, crushed stone and sand with a mass ratio of 1:2:10:6; the tackifier is selected as epoxy acrylate resin, and the composite fiber stabilizer includes a mixture of hydroxypropyl methylcellulose and the modified microcrystalline cellulose / talc powder composite prepared in Preparation Example 2 with a mass ratio of 1:1.5; The reinforcing filler is prepared by the following method: Step 1: Prepare a porous base gasification slag / waste rubber powder composite: Mix the gasification slag and waste rubber powder according to a mass ratio of 1:0.4 to obtain a mixed powder, then mix the mixed powder with water according to a mass ratio of 1:6, perform ultrasonic dispersion, add hydroxyethyl cellulose and mix, the addition amount of hydroxyethyl cellulose is 1 wt% of the addition amount of the mixed powder, then add a polyurethane prepolymer and mix, the addition mass ratio of the polyurethane prepolymer to the mixed powder is 1:3, stir and foam, and stand for 24 h to solidify and then air-dry to obtain the porous base gasification slag / waste rubber powder composite; Step 2: Prepare a modified porous carrier: After dissolving cetyltrimethylammonium chloride and water according to a mass ratio of 1:4, add the porous base gasification slag / waste rubber powder composite prepared in Step 1, the addition mass ratio of the porous base gasification slag / waste rubber powder composite to cetyltrimethylammonium chloride is 1:0.2, impregnate for 40 min, the impregnation temperature is 40 °C, and after the impregnation is completed, filter and dry to obtain the modified porous carrier; Step 3: Disperse nano-silica in ethanol, and the addition mass ratio of nano-silica to ethanol is 1:4, add polyethylene glycol, and obtain a suspension after ultrasonic treatment, then add the modified porous carrier prepared in Step 2 to the suspension, perform pressure impregnation, the impregnation pressure is 0.5 MPa, after impregnating for 50 min, first dry at 50 °C for 2.5 h, and then heat up to 120 °C for treatment for 4 h to obtain the reinforcing filler, wherein the addition amount of polyethylene glycol is 3 wt% of the addition amount of nano-silica, and the addition mass ratio of the modified porous carrier to nano-silica is 1:0.4.

[0040] Example 3 A preparation method of a highway disease repair material includes the following steps: Mix 80 kg of mineral filler, 10 kg of reinforcing filler, and 8 kg of composite fiber stabilizer, add 10 kg of waste rubber powder, and mix to obtain a premix; Mix 20 kg of SBS modified asphalt with 15 kg of tackifier and add the mixture to the premix for stirring and mixing to obtain the repair material.

[0041] Among them, the mineral filler includes cement, stone powder, crushed stone and sand with a mass ratio of 1:3:12:8; the tackifier is selected as epoxy acrylate resin, and the composite fiber stabilizer includes a mixture of hydroxypropyl methylcellulose and the modified microcrystalline cellulose / talc composite prepared in Preparation Example 3 with a mass ratio of 1:2; The reinforcing filler is prepared by the following method: Step 1: Prepare a porous base gasification slag / waste rubber powder composite: Mix the gasification slag and waste rubber powder in a mass ratio of 1:0.5 to obtain a mixed powder, then mix the mixed powder with water in a mass ratio of 1:8, ultrasonically disperse, add hydroxyethyl cellulose and mix, the addition amount of hydroxyethyl cellulose is 3wt% of the addition amount of the mixed powder, then add a polyurethane prepolymer and mix, the addition mass ratio of the polyurethane prepolymer to the mixed powder is 1:5, stir and foam, and stand for 24h to solidify and then air-dry to obtain a porous base gasification slag / waste rubber powder composite; Step 2: Prepare a modified porous carrier: After dissolving cetyltrimethylammonium chloride and water in a mass ratio of 1:6, add the porous base gasification slag / waste rubber powder composite prepared in Step 1, the addition mass ratio of the porous base gasification slag / waste rubber powder composite to cetyltrimethylammonium chloride is 1:0.3, impregnate for 60min, the impregnation temperature is 30°C, and after impregnation, filter and dry to obtain a modified porous carrier; Step 3: Disperse nano-silica in ethanol, and the addition mass ratio of nano-silica to ethanol is 1:5, add polyethylene glycol, and obtain a suspension after ultrasonic treatment, then add the modified porous carrier prepared in Step 2 to the suspension, pressurize and impregnate, the impregnation pressure is 0.8MPa, after impregnating for 30min, first dry at 60°C for 1.5h, and then heat up to 130°C and treat for 3h to obtain a reinforcing filler, wherein the addition amount of polyethylene glycol is 5wt% of the addition amount of nano-silica, and the addition mass ratio of the modified porous carrier to nano-silica is 1:0.6.

[0042] Example 4 A preparation method of a highway disease repair material is carried out according to the method in Example 1, the difference is that when preparing the reinforcing filler, in Step 3, the porous base gasification slag / waste rubber powder composite forms a primary filler after pressurized impregnation and drying in the suspension, and the primary filler is also impregnated in a KH-550 silane coupling agent solution with a mass concentration of 5wt% for 30min and then dried to obtain a reinforcing filler, wherein the silane coupling agent solution is 8 mass times of the primary filler, and the impregnation temperature is 30°C.

[0043] Example 5 A preparation method of a highway disease repair material is carried out according to the method in Example 1, except that when preparing the reinforcing filler, in Step 3, the porous-based gasification slag / waste rubber powder composite is pressure-impregnated in a suspension and dried to form a primary filler, and the primary filler is further impregnated in a KH-550 silane coupling agent solution with a mass concentration of 5 wt% for 20 min and then dried to obtain the reinforcing filler, where the silane coupling agent solution is 7 times the mass of the primary filler and the impregnation temperature is 35 °C.

[0044] Example 6 A preparation method of a highway disease repair material is carried out according to the method in Example 1, except that the reinforcing filler is zeolite and nano-silica with a mass ratio of 1:0.5.

[0045] Example 7 A preparation method of a highway disease repair material is carried out according to the method in Example 1, except that the reinforcing filler is gasification slag and nano-silica with a mass ratio of 1:0.5.

[0046] Example 8 A preparation method of a highway disease repair material is carried out according to the method in Example 1, except that in the preparation of the reinforcing filler, Step 1 treatment is not carried out, and in Step 2, the porous-based gasification slag / waste rubber powder composite is replaced with zeolite in equal amount, and the rest is carried out according to the method in Example 1.

[0047] Comparative Example 1-2 A preparation method of a highway disease repair material is carried out according to the method in Example 1, except that the modified microcrystalline cellulose / talc powder composite is respectively the modified microcrystalline cellulose / talc powder composites prepared in Comparative Example 1 and Comparative Example 2.

[0048] Comparative Example 3 A preparation method of a highway disease repair material is carried out according to the method in Example 1, except that in the composite fiber stabilizer, the modified microcrystalline cellulose / talc powder composite is replaced with microcrystalline cellulose in equal amount, that is, the composite fiber stabilizer includes hydroxypropyl methyl cellulose and microcrystalline cellulose with a mass ratio of 1:1.8.

[0049] Comparative Example 4 A preparation method of a highway disease repair material is carried out according to the method in Example 1, except that in the composite fiber stabilizer, the modified microcrystalline cellulose / talc powder composite is replaced with a mixture of microcrystalline cellulose and talc powder in equal amount, and the added mass ratio of microcrystalline cellulose to talc powder is 1:2.

[0050] Comparative Example 5 A preparation method of a highway disease repair material is carried out according to the method in Example 1, except that no composite fiber stabilizer is added to the raw materials.

[0051] Comparative Example 6 A preparation method of a highway disease repair material is carried out according to the method in Example 1, except that no reinforcing filler is added to the raw materials.

[0052] This application also discloses a method for repairing highway diseases using the above repair material, including the following steps: S1. Remove the excess debris in the pothole; S2. Apply tack coat oil (PC-3 cationic emulsified asphalt of Maoming Zhengcheng Petrochemical Co., Ltd.) around the inner wall and bottom of the pothole, and then mix and spread the repair material in the pothole; S3. Roll and level the highway pavement.

[0053] Performance testing First, pour the repair materials prepared in the examples and comparative examples of this application into the test mold, level and compact them, compact the specimens, demold the specimens after 95 compaction times, and detect the compressive strength of the specimens. In addition, according to "Cold Patch Finished Materials for Asphalt Pavement Potholes" (JT / T 972-2015) and "Test Procedures for Bitumen and Bituminous Mixtures in Highway Engineering", detect the adhesion between asphalt and aggregates, penetration strength, Marshall stability and residual stability. The test results are shown in Table 1 below.

[0054] Table 1: Continued Table 1: Referring to the test results in Table 1 above, the repair materials prepared in the examples of this application have higher compressive strength and penetration strength, higher bearing capacity and anti-destruction performance, and also have good adhesion. The bonding force between asphalt and aggregates is better, and their Marshall stability and residual stability are higher, with good durability. Referring to the test results of Example 1 and Examples 4-5, when preparing the reinforcing filler, after loading nano-silica on the porous carrier, it is also treated with silane coupling agent, and its strength, adhesion and durability are all improved, which not only helps the chemical bonding between nano-silica and the porous carrier, but also helps the compatibility and interaction with other asphalt and fillers in the system, thereby further improving the performance of the repair material.

[0055] Combined with the test results of Example 1 and Examples 6-7, when the reinforcing filler is selected as ordinary zeolite or gasified slag and simply mixed with nano-silica, its performance decreases. When added in a loaded and modified manner in this application, it not only helps to improve the anti-deformation performance but also can increase its service life. Combined with the test results of Example 8, when nano-silica is directly loaded on zeolite and added, its penetration strength decreases and its durability also decreases. The selection of the porous carrier in the reinforcing filler is conducive to the loading of nano-silica and is more beneficial to the anti-deformation performance. Referring to the test results of Example 1, Comparative Example 1 and Comparative Example 2, when the microcrystalline cellulose / talc composite is prepared without adding glycine, its comprehensive performance decreases. The introduction of amino and carboxyl groups in glycine not only helps to act with the hydroxyl groups on the surfaces of microcrystalline cellulose and talc but also can form chemical bonds with the reinforcing filler, contributing to the improvement of the bonding force and durability of the overall repair material. Combined with the test results of Comparative Example 3, when microcrystalline cellulose is directly added in the composite fiber stabilizer or directly added after mixing microcrystalline cellulose and talc in Comparative Example 4, their performances are similar and far weaker than the test results in Example 1. Combined with the test results of Comparative Example 5 and Comparative Example 6, when the composite fiber stabilizer and the reinforcing filler are not added, its performance decreases significantly.

[0056] This specific embodiment is only an interpretation of this application and does not limit this application. After reading this specification, those skilled in the art can make modifications to this embodiment without creative contributions as needed, but as long as it is within the scope of the claims of this application, it is protected by the patent law.

Claims

1. A highway disease repair material, characterized in that, It includes the following raw materials in parts by weight: 10 - 20 parts of SBS modified asphalt, 5 - 10 parts of waste rubber powder, 5 - 15 parts of tackifier, 3 - 8 parts of composite fiber stabilizer, 50 - 80 parts of mineral filler, 5 - 10 parts of reinforcing filler; Among them, the tackifier is selected as epoxy acrylate resin, and the composite fiber stabilizer includes hydroxypropyl methylcellulose and modified microcrystalline cellulose / talc powder complex with a mass ratio of 1:(1.5 - 2); The modified microcrystalline cellulose / talc powder complex is prepared by first treating talc powder with γ - methacryloxypropyltrimethoxysilane and 3 - allyloxy - 2 - hydroxy - 1 - propane sulfonate sodium salt to obtain pretreated talc powder, and then mixing the pretreated talc powder with microcrystalline cellulose and reacting with terephthalic acid and glycine.

2. The highway disease repair material according to claim 1, characterized in that: The modified microcrystalline cellulose / talc powder complex is prepared by the following method: 1). Mix γ - methacryloxypropyltrimethoxysilane with absolute ethanol and adjust the pH to 4 - 5 to obtain a silanol solution; 2). Then immerse talc powder in the prepared silanol solution, with the immersion temperature of 50 - 60°C and the immersion time of 2 - 3 h, then filter and wash with alcohol, and dry to obtain modified talc powder; 3). Dissolve 3 - allyloxy - 2 - hydroxy - 1 - propane sulfonate sodium salt in water to obtain a modified solution, then add the modified talc powder and ultrasonically disperse, then add an initiator and react at 65 - 75°C for 1 - 2 h, then centrifuge and wash with water, and dry to obtain pretreated talc powder; 4). Alkaline wash microcrystalline cellulose and then wash and dry with water to obtain activated microcrystalline cellulose, mix the activated microcrystalline cellulose with the pretreated talc powder and ball - mill to obtain a mixture; 5). Dissolve terephthalic acid and glycine in N,N - dimethylacetamide to obtain a mixed solution, then add the mixture, stir and add an acid catalyst, reflux and react at 120 - 130°C for 4 - 6 h, after the reaction is completed, wash with water and then vacuum - dry to obtain the modified microcrystalline cellulose / talc powder complex.

3. The highway disease repair material according to claim 2, characterized in that: During the preparation process of the modified microcrystalline cellulose / talc powder complex, the addition volume ratio of γ - methacryloxypropyltrimethoxysilane to absolute ethanol in step 1) is 1:(6 - 8); The addition mass ratio of talc powder to the silanol solution in step 2) is 1:(5 - 6); In step 3), the mass concentration of 3 - allyloxy - 2 - hydroxy - 1 - propane sulfonate sodium salt in the modified solution is 10 - 15 wt%, and the addition mass ratio of 3 - allyloxy - 2 - hydroxy - 1 - propane sulfonate sodium salt to the modified talc powder is 1:(4 - 5), and the addition amount of the initiator is 0.5 - 1 wt% of the modified talc powder; The addition mass ratio of activated microcrystalline cellulose to the pretreated talc powder in step 4) is 1:(1.8 - 2.5); In step 5), the addition mass ratio of terephthalic acid to glycine is 1:(0.5 - 0.8), and the addition mass ratio of terephthalic acid to water is 1:(6 - 8), the addition amount of the acid catalyst is 1 - 2 wt% of the addition amount of terephthalic acid, and the addition mass ratio of terephthalic acid to the mixture is 1:(3 - 4).

4. A highway disease repair material according to claim 1, characterized in that: The mineral filler includes cement, stone powder, crushed stone and sand with a mass ratio of 1:(2 - 3):(10 - 12):(6 - 8).

5. A highway disease repair material according to claim 1, characterized in that: The reinforcing filler is prepared by loading nano-silica on a modified porous carrier, and the modified porous carrier is obtained by modifying a porous base gasification slag / waste rubber powder composite with cetyltrimethylammonium chloride.

6. The highway disease repair material according to claim 5, characterized in that: The porous base gasification slag / waste rubber powder composite is prepared by the following method: Mix the gasification slag and waste rubber powder to obtain a mixed powder, then mix the mixed powder with water, ultrasonically disperse it, add hydroxyethyl cellulose and mix, then add a polyurethane prepolymer and mix, stir and foam, stand for solidification and then air-dry to obtain the porous base gasification slag / waste rubber powder composite.

7. The highway disease repair material according to claim 6, characterized in that: During the preparation of the porous base gasification slag / waste rubber powder composite, the mass ratio of the added gasification slag to the waste rubber powder is 1:(0.4 - 0.5), the mass ratio of the added mixed powder to water is 1:(6 - 8), the addition amount of hydroxyethyl cellulose is 1 - 3 wt% of the addition amount of the mixed powder, and the mass ratio of the added polyurethane prepolymer to the mixed powder is 1:(3 - 5).

8. A highway disease repair material according to claim 5, characterized in that: The reinforcing filler is prepared by the following method: After dissolving cetyltrimethylammonium chloride and water according to a mass ratio of 1:(4 - 6), add the porous base gasification slag / waste rubber powder composite. The mass ratio of the added porous base gasification slag / waste rubber powder composite to cetyltrimethylammonium chloride is 1:(0.2 - 0.3), impregnate for 40 - 60 min, the impregnation temperature is 30 - 40 °C, and after impregnation, filter and dry to obtain the modified porous carrier; Disperse nano-silica in ethanol, and the mass ratio of the added nano-silica to ethanol is 1:(4 - 5), add polyethylene glycol, obtain a suspension after ultrasonic treatment, then add the modified porous carrier to the suspension, carry out pressure impregnation, the impregnation pressure is 0.5 - 0.8 MPa, after impregnating for 30 - 50 min, first dry at 50 - 60 °C for 1.5 - 2.5 h, then raise the temperature to 120 - 130 °C and treat for 3 - 4 h to obtain the reinforcing filler, wherein the addition amount of polyethylene glycol is 3 - 5 wt% of the addition amount of nano-silica, and the mass ratio of the added modified porous carrier to nano-silica is 1:(0.4 - 0.6).

9. A highway disease repair material according to claim 8, characterized in that: When preparing the reinforcing filler, after the modified porous carrier is pressure-impregnated and dried in the suspension, it is also impregnated and treated in a silane coupling agent solution and then dried to obtain the reinforcing filler.

10. A method for repairing highway diseases, characterized in that: It includes the following steps: S1. Remove the excess crushed materials in the pothole; S2. Apply a tack coat oil around the inner wall and at the bottom of the pothole, and then mix and spread the repair material in the pothole; S3. Roll and level the road surface.

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