Production process of high-wear-resistance asphalt concrete

Abstract

The invention discloses a production process of high-wear-resistance asphalt concrete, and the asphalt concrete comprises the following raw materials: 70-90 parts of matrix asphalt, 5-8 parts of modified SBS resin, 5-8 parts of organosilicon epoxy resin, 2-3 parts of functional filler, 0.1-0.5 part of benzoyl peroxide, 0.5-1 part of m-phenylenediamine, 1000-1200 parts of sandstone aggregate and 80-120 parts of mineral powder. Materimide on the functional filler can be grafted with a modified SBS resin molecular chain, meanwhile, an epoxy group on the modified SBS resin molecule can be cross-linked with organic silicon epoxy resin, an organic silicon molecular chain segment has very high flexibility, and the flexibility is beneficial to dispersing stress, reducing stress concentration and forming a plurality of cross-linking sites, so that the cross-linking effect is improved, and the service life of the organic silicon epoxy resin is prolonged. The composite structure of the bamboo fibers and the polyhedral oligomeric silsesquioxane can protect the asphalt concrete from cracking, so that the service life of the asphalt concrete is greatly prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of asphalt concrete preparation, and in particular to a production process of high-wear-resistant asphalt concrete. Background Art

[0002] Asphalt concrete is a multiphase composite material formed by mixing asphalt, aggregate, and filler materials in specific proportions. Due to its excellent ductility, asphalt concrete is better able to adapt to deformation caused by geological activity and building settlement. Asphalt concrete is a primary material for modern road pavement structures and is widely used on all types of roads, especially high-speed roads. Asphalt concrete pavements offer excellent mechanical properties and road performance, with smooth, seamless surfaces, low vibration and noise reduction, comfortable driving, and high traffic safety. Therefore, they are favored by designers and builders in highway construction. However, current asphalt concrete has poor wear resistance. After long-term use, the road surface becomes worn, uneven, and cracked, which in turn affects traffic safety. Summary of the Invention

[0003] The purpose of the present invention is to provide a production process for high-wear-resistant asphalt concrete, which solves the problem that the asphalt concrete at this stage has poor wear resistance and is easy to crack.

[0004] The purpose of the present invention can be achieved through the following technical solutions:

[0005] A production process of high wear-resistant asphalt concrete specifically comprises the following steps:

[0006] Step A1: The modified filler, maleic anhydride, and DMF are mixed and reacted at a speed of 150-200 r / min and a temperature of 25-30° C. for 2-3 hours. The temperature is then raised to 80-85° C., p-toluenesulfonic acid is added, and the reaction is continued for 4-6 hours to obtain a functional filler. SBS resin is dissolved in cyclohexane, formic acid and hydrogen peroxide are added, and the mixture is stirred at a speed of 120-150 r / min and a temperature of 70-75° C., and hexadecyltrimethylammonium chloride is added and the reaction is continued for 4-6 hours to obtain a modified SBS resin.

[0007] Step A2: Octamethylcyclotetrasiloxane, tetramethylammonium hydroxide, 3-glycidyloxypropylmethyldiethoxysilane, hexamethyldisiloxane, and deionized water were mixed, nitrogen was introduced, and the mixture was reacted at a speed of 120-150 r / min and a temperature of 90-95° C. for 10-12 hours to produce a silicone epoxy resin;

[0008] Step A3: Weigh the following raw materials in parts by weight: 70-90 parts of matrix asphalt, 5-8 parts of modified SBS resin, 5-8 parts of silicone epoxy resin, 2-3 parts of functional filler, 0.1-0.5 parts of benzoyl peroxide, 0.5-1 parts of m-phenylenediamine, 1000-1200 parts of sand and gravel aggregate, and 80-120 parts of mineral powder; mix the matrix asphalt, modified SBS resin, silicone epoxy resin, functional filler, and benzoyl peroxide; stir the mixture at a speed of 1500-1600 r / min and a temperature of 150-160° C. for 30-40 minutes; raise the temperature to 170-180° C.; add m-phenylenediamine; and stir the mixture at a speed of 4000-5000 r / min for 40-50 minutes to obtain high wear-resistant asphalt concrete.

[0009] Furthermore, the molar ratio of amino groups and maleic anhydride on the modified filler described in step A1 is 1:1, the amount of p-toluenesulfonic acid is 3% of maleic anhydride, the amount ratio of SBS resin, cyclohexane, formic acid and hydrogen peroxide is 10g:100mL:10mL:13mL, and the amount of hexadecyltrimethylammonium chloride is 1% of the mass of SBS.

[0010] Furthermore, the usage ratio of octamethylcyclotetrasiloxane, tetramethylammonium hydroxide, 3-glycidyloxypropylmethyldiethoxysilane, hexamethyldisiloxane and deionized water in step A2 is 2.3 mol:2 mol:0.1 mol:3 mol:5 L.

[0011] Furthermore, the modified filler is prepared by the following steps:

[0012] Step B1: n-octyltriethoxysilane, isopropanol, sodium hydroxide and deionized water are mixed uniformly, reacted at a speed of 120-150 r / min and a temperature of 90-95° C. for 2-4 hours, then cooled to 20-25° C. and reacted for 12-14 hours to obtain sodium tetrasiloxane tetrasiloxide. Sodium tetrasiloxane tetrasiloxide, triethylamine and tetrahydrofuran are mixed uniformly, nitrogen protection is introduced, and methyldichlorosilane is added under stirring at a speed of 60-80 r / min and a temperature of 0-3° C., and the mixture is reacted for 3-5 hours. The temperature is then raised to 35-40° C. and the reaction is carried out for 12-14 hours to obtain dihydrogen cage-type silsesquioxane;

[0013] Step B2: The bamboo fiber and the sodium hydroxide solution are mixed evenly, stirred at a speed of 60-80 r / min and a temperature of 40-50° C. for 30-40 minutes, and then toluene and acryloyl chloride are added. The temperature is raised to 105-110° C. and the reaction is carried out for 8-10 hours to obtain functionalized fiber. The dihydrogen cage silsesquioxane, functionalized fiber, chloroplatinic acid and DMF are mixed evenly, nitrogen protection is introduced, and the reaction is carried out at a speed of 120-150 r / min and a temperature of 80-85° C. for 6-8 hours to obtain a precursor;

[0014] Step B3: Octamethylcyclotetrasiloxane, tetramethylcyclotetrasiloxane, 1,3-bis(aminopropyl)tetramethyldisiloxane, tetramethylammonium hydroxide and DMF are mixed evenly, and the mixture is reacted at a speed of 150-200 r / min and a temperature of 105-110°C for 2-3 hours to obtain a modifier. The precursor, modifier, platinic acid and DMF are mixed evenly, nitrogen is introduced for protection, and the mixture is reacted at a speed of 200-300 r / min and a temperature of 85-90°C for 4-6 hours to obtain a modified filler.

[0015] Furthermore, the amount ratio of n-octyltriethoxysilane, isopropyl alcohol, sodium hydroxide and deionized water in step B1 is 55mmol:50mL:35mmol:1mL, and the amount ratio of sodium tetrasiloxane tetrasilanolate, triethylamine, tetrahydrofuran and methyldichlorosilane is 10g:4g:30mL:2.5g.

[0016] Furthermore, the amount ratio of the bamboo fiber, sodium hydroxide solution, toluene and acryloyl chloride described in step B2 is 2g:10mL:6mL:10g, the mass ratio of dihydrogen cage silsesquioxane and functionalized fiber is 1:5, and the amount of chloroplatinic acid is 1‰ of the mass of dihydrogen cage silsesquioxane.

[0017] Furthermore, the molar ratio of octamethylcyclotetrasiloxane, tetramethylcyclotetrasiloxane, 1,3-bis(aminopropyl)tetramethyldisiloxane and tetramethylammonium hydroxide described in step B3 is 2.3 mol:0.1 mol:3 mol:2 mol, the mass ratio of the precursor and the modifier is 1:5, and the amount of chloroplatinic acid used is 2‰ of the mass of the modifier.

[0018] The beneficial effects of the present invention are as follows: a high-wear-resistant asphalt concrete disclosed in the present invention comprises the following raw materials: base asphalt, modified SBS resin, silicone epoxy resin, functional filler, benzoyl peroxide, m-phenylenediamine, sand and gravel aggregate and mineral powder; the modified SBS resin is prepared by using SBS resin, formic acid and hydrogen peroxide as raw materials, using hexadecyltrimethylammonium chloride as a phase transfer catalyst, epoxidizing double bonds in the SBS resin molecular chain into epoxy groups to obtain the modified SBS resin; the silicone epoxy resin is ring-opened using octamethylcyclotetrasiloxane as a raw material and hydrolyzed and condensed with 3-glycidyloxypropylmethyldiethoxysilane, and finally end-capping with hexamethyldisiloxane to obtain the silicone epoxy resin.

[0019] The functional filler is made of modified filler and maleic anhydride as raw materials, so that the amino group on the modified filler reacts with maleic anhydride to form a maleimide structure. The modified filler is hydrolyzed and condensed with n-octyltriethoxysilane to form tetrasiloxane tetrasilanolate sodium containing n-octyl. The tetrasiloxane tetrasilanolate sodium reacts with methyldichlorosilane, so that the sodium silanol on the tetrasiloxane tetrasilanolate reacts with the chlorine atom site on the methyldichlorosilane to obtain dihydrogen cage-type silsesquioxane. The bamboo fiber is treated with sodium hydroxide solution to obtain alcoholic hydroxyl groups converted into sodium alcoholate, which is then reacted with acryloyl chloride. The present invention relates to a method for preparing a modified filler by reacting a double bond on the bamboo fiber molecule to obtain a functionalized fiber, reacting the functionalized fiber with a dihydrogen cage silsesquioxane to obtain a double bond on the functional fiber and a Si-H bond on the dihydrogen cage silsesquioxane to obtain a precursor, ring-opening polymerization of octamethylcyclotetrasiloxane and tetramethylcyclotetrasiloxane, and then capping the mixture with 1,3-bis(aminopropyl)tetramethyldisiloxane to obtain a modifier, and reacting the precursor with the modifier to obtain a modified filler by reacting the remaining double bond on the precursor with the Si-H bond on the modifier.

[0020] During the raw material mixing process, under the action of benzoyl peroxide, the maleimide on the functional filler will be grafted with the modified SBS resin molecular chain. At the same time, under the action of m-phenylenediamine, the epoxy group on the modified SBS resin molecule will be cross-linked with the silicone epoxy resin. The silicone molecular chain segment has high flexibility. This is mainly because the bond angle of the silicon-oxygen bond is large and the bond length is long, which makes the molecular chain easier to rotate and bend. This flexibility helps to disperse stress, reduce stress concentration, and form multiple cross-linking sites, thereby improving the wear resistance of asphalt concrete. The composite structure of bamboo fiber and cage-type silsesquioxane can increase the protection of asphalt concrete from cracking, greatly improving the service life of asphalt concrete. DETAILED DESCRIPTION

[0021] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0022] Example 1: A production process for highly wear-resistant asphalt concrete, comprising the following steps:

[0023] Step A1: The modified filler, maleic anhydride, and DMF were mixed and reacted at a speed of 150 r / min and a temperature of 25°C for 2 hours. The temperature was then raised to 80°C, p-toluenesulfonic acid was added, and the reaction was continued for 4 hours to obtain a functional filler. SBS resin was dissolved in cyclohexane, formic acid and hydrogen peroxide were added, and the mixture was stirred at a speed of 120 r / min and a temperature of 70°C. Hexadecyltrimethylammonium chloride was added and the reaction was continued for 4 hours to obtain a modified SBS resin.

[0024] Step A2: Octamethylcyclotetrasiloxane, tetramethylammonium hydroxide, 3-glycidyloxypropylmethyldiethoxysilane, hexamethyldisiloxane, and deionized water were mixed, nitrogen was introduced, and the mixture was reacted at a speed of 120 r / min and a temperature of 90° C. for 10 hours to produce an organosilicon epoxy resin;

[0025] Step A3: Weigh the following raw materials in parts by weight: 70 parts of base asphalt, 5 parts of modified SBS resin, 5 parts of silicone epoxy resin, 2 parts of functional filler, 0.1 parts of benzoyl peroxide, 0.5 parts of m-phenylenediamine, 1000 parts of sand and gravel aggregate and 80 parts of mineral powder, mix the base asphalt, modified SBS resin, silicone epoxy resin, functional filler and benzoyl peroxide, stir at a speed of 1500 r / min and a temperature of 150°C for 30 minutes, raise the temperature to 170°C, add m-phenylenediamine, stir at a speed of 4000 r / min for 40 minutes, and obtain high wear-resistant asphalt concrete.

[0026] The molar ratio of amino groups and maleic anhydride on the modified filler described in step A1 is 1:1, the amount of p-toluenesulfonic acid is 3% of the maleic anhydride, the amount ratio of SBS resin, cyclohexane, formic acid and hydrogen peroxide is 10g:100mL:10mL:13mL, the amount of hexadecyltrimethylammonium chloride is 1% of the mass of SBS, and the SBS resin model is D1101.

[0027] The amount ratio of octamethylcyclotetrasiloxane, tetramethylammonium hydroxide, 3-glycidyloxypropylmethyldiethoxysilane, hexamethyldisiloxane and deionized water described in step A2 is 2.3 mol:2 mol:0.1 mol:3 mol:5 L.

[0028] The matrix asphalt described in step A3 is 70 grade A asphalt, the particle size of the sand and gravel aggregate is 8 mm, and the particle size of the mineral powder is 0.05 mm.

[0029] The modified filler is prepared by the following steps:

[0030] Step B1: n-octyltriethoxysilane, isopropyl alcohol, sodium hydroxide and deionized water were mixed uniformly, reacted at a speed of 120 r / min and a temperature of 90°C for 2 hours, then cooled to 20°C and reacted for 12 hours to obtain sodium tetrasiloxane tetrasilanolate. Sodium tetrasiloxane tetrasilanolate, triethylamine and tetrahydrofuran were mixed uniformly, nitrogen protection was introduced, and methyldichlorosilane was added under stirring at a speed of 60 r / min and a temperature of 0°C. The mixture was reacted for 3 hours, then heated to 35°C and reacted for 12 hours to obtain dihydrogen cage-type silsesquioxane;

[0031] Step B2: The bamboo fiber and the sodium hydroxide solution were mixed evenly, stirred at a speed of 60 r / min and a temperature of 40°C for 30 minutes, and then toluene and acryloyl chloride were added. The temperature was raised to 105°C and the reaction was carried out for 8 hours to obtain functionalized fiber. The dihydrogen cage silsesquioxane, functionalized fiber, chloroplatinic acid and DMF were mixed evenly, nitrogen was introduced, and the reaction was carried out at a speed of 120 r / min and a temperature of 80°C for 6 hours to obtain a precursor.

[0032] Step B3: Octamethylcyclotetrasiloxane, tetramethylcyclotetrasiloxane, 1,3-bis(aminopropyl)tetramethyldisiloxane, tetramethylammonium hydroxide and DMF were mixed evenly, and the reaction was carried out at a speed of 150 r / min and a temperature of 105 ° C for 2 hours to obtain a modifier. The precursor, modifier, platinic acid and DMF were mixed evenly, nitrogen was introduced for protection, and the reaction was carried out at a speed of 200 r / min and a temperature of 85 ° C for 4 hours to obtain a modified filler.

[0033] The amount ratio of n-octyltriethoxysilane, isopropyl alcohol, sodium hydroxide and deionized water described in step B1 is 55mmol:50mL:35mmol:1mL, and the amount ratio of sodium tetrasiloxane tetrasilanolate, triethylamine, tetrahydrofuran and methyldichlorosilane is 10g:4g:30mL:2.5g.

[0034] The amount ratio of the bamboo fiber, sodium hydroxide solution, toluene and acryloyl chloride described in step B2 is 2g:10mL:6mL:10g, the mass ratio of dihydrogen cage silsesquioxane and functionalized fiber is 1:5, and the amount of chloroplatinic acid is 1‰ of the mass of dihydrogen cage silsesquioxane.

[0035] The molar ratio of octamethylcyclotetrasiloxane, tetramethylcyclotetrasiloxane, 1,3-bis(aminopropyl)tetramethyldisiloxane and tetramethylammonium hydroxide in step B3 is 2.3 mol:0.1 mol:3 mol:2 mol, the mass ratio of the precursor to the modifier is 1:5, and the amount of chloroplatinic acid used is 2‰ of the mass of the modifier.

[0036] Example 2: A production process for highly wear-resistant asphalt concrete, comprising the following steps:

[0037] Step A1: The modified filler, maleic anhydride, and DMF were mixed and reacted at a speed of 150 r / min and a temperature of 30°C for 2 hours. The temperature was then raised to 80°C, p-toluenesulfonic acid was added, and the reaction was continued for 5 hours to obtain a functional filler. SBS resin was dissolved in cyclohexane, formic acid and hydrogen peroxide were added, and the mixture was stirred at a speed of 150 r / min and a temperature of 70°C. Hexadecyltrimethylammonium chloride was added and the reaction was continued for 5 hours to obtain a modified SBS resin.

[0038] Step A2: Octamethylcyclotetrasiloxane, tetramethylammonium hydroxide, 3-glycidyloxypropylmethyldiethoxysilane, hexamethyldisiloxane, and deionized water were mixed, nitrogen was introduced, and the mixture was reacted at a speed of 120 r / min and a temperature of 95° C. for 11 to produce an organosilicon epoxy resin;

[0039] Step A3: Weigh the following raw materials in parts by weight: 80 parts of matrix asphalt, 6.5 parts of modified SBS resin, 6.5 parts of silicone epoxy resin, 2.5 parts of functional filler, 0.3 parts of benzoyl peroxide, 0.8 parts of m-phenylenediamine, 1100 parts of sand and gravel aggregate and 100 parts of mineral powder; mix the matrix asphalt, modified SBS resin, silicone epoxy resin, functional filler and benzoyl peroxide; stir at a speed of 1500 r / min and a temperature of 155°C for 35 minutes; raise the temperature to 175°C; add m-phenylenediamine; stir at a speed of 4000 r / min for 45 minutes to obtain high wear-resistant asphalt concrete.

[0040] The molar ratio of amino groups and maleic anhydride on the modified filler described in step A1 is 1:1, the amount of p-toluenesulfonic acid is 3% of the maleic anhydride, the amount ratio of SBS resin, cyclohexane, formic acid and hydrogen peroxide is 10g:100mL:10mL:13mL, the amount of hexadecyltrimethylammonium chloride is 1% of the mass of SBS, and the SBS resin model is D1101.

[0041] The amount ratio of octamethylcyclotetrasiloxane, tetramethylammonium hydroxide, 3-glycidyloxypropylmethyldiethoxysilane, hexamethyldisiloxane and deionized water described in step A2 is 2.3 mol:2 mol:0.1 mol:3 mol:5 L.

[0042] The matrix asphalt described in step A3 is 70 grade A asphalt, the particle size of the sand and gravel aggregate is 8 mm, and the particle size of the mineral powder is 0.05 mm.

[0043] The modified filler is prepared by the following steps:

[0044] Step B1: n-octyltriethoxysilane, isopropyl alcohol, sodium hydroxide and deionized water were mixed uniformly, reacted at a speed of 120 r / min and a temperature of 95°C for 3 hours, then cooled to 20°C and reacted for 14 hours to obtain sodium tetrasiloxane tetrasilanolate. Sodium tetrasiloxane tetrasilanolate, triethylamine and tetrahydrofuran were mixed uniformly, nitrogen protection was introduced, and methyldichlorosilane was added under stirring at a speed of 60 r / min and a temperature of 3°C. The mixture was reacted for 4 hours, then heated to 35°C and reacted for 14 hours to obtain dihydrogen cage-type silsesquioxane;

[0045] Step B2: The bamboo fiber and the sodium hydroxide solution were mixed evenly, stirred at a speed of 60 r / min and a temperature of 45°C for 35 minutes, and then toluene and acryloyl chloride were added. The temperature was raised to 108°C and the reaction was carried out for 9 hours to obtain functionalized fiber. The dihydrogen cage silsesquioxane, functionalized fiber, chloroplatinic acid and DMF were mixed evenly, nitrogen was introduced, and the reaction was carried out at a speed of 120 r / min and a temperature of 85°C for 7 hours to obtain a precursor.

[0046] Step B3: Octamethylcyclotetrasiloxane, tetramethylcyclotetrasiloxane, 1,3-bis(aminopropyl)tetramethyldisiloxane, tetramethylammonium hydroxide and DMF were mixed evenly, and the reaction was carried out at a speed of 150 r / min and a temperature of 110°C for 2 hours to obtain a modifier. The precursor, modifier, platinic acid and DMF were mixed evenly, nitrogen was introduced for protection, and the reaction was carried out at a speed of 300 r / min and a temperature of 85°C for 5 hours to obtain a modified filler.

[0047] The amount ratio of n-octyltriethoxysilane, isopropyl alcohol, sodium hydroxide and deionized water described in step B1 is 55mmol:50mL:35mmol:1mL, and the amount ratio of sodium tetrasiloxane tetrasilanolate, triethylamine, tetrahydrofuran and methyldichlorosilane is 10g:4g:30mL:2.5g.

[0048] The amount ratio of the bamboo fiber, sodium hydroxide solution, toluene and acryloyl chloride described in step B2 is 2g:10mL:6mL:10g, the mass ratio of dihydrogen cage silsesquioxane and functionalized fiber is 1:5, and the amount of chloroplatinic acid is 1‰ of the mass of dihydrogen cage silsesquioxane.

[0049] The molar ratio of octamethylcyclotetrasiloxane, tetramethylcyclotetrasiloxane, 1,3-bis(aminopropyl)tetramethyldisiloxane and tetramethylammonium hydroxide in step B3 is 2.3 mol:0.1 mol:3 mol:2 mol, the mass ratio of the precursor to the modifier is 1:5, and the amount of chloroplatinic acid used is 2‰ of the mass of the modifier.

[0050] Example 3: A production process for highly wear-resistant asphalt concrete, comprising the following steps:

[0051] Step A1: The modified filler, maleic anhydride, and DMF were mixed and reacted at a speed of 200 r / min and a temperature of 30°C for 3 hours. The temperature was then raised to 85°C, p-toluenesulfonic acid was added, and the reaction was continued for 6 hours to obtain a functional filler. SBS resin was dissolved in cyclohexane, formic acid and hydrogen peroxide were added, and the mixture was stirred at a speed of 150 r / min and a temperature of 75°C. Hexadecyltrimethylammonium chloride was added and the reaction was continued for 6 hours to obtain a modified SBS resin.

[0052] Step A2: Octamethylcyclotetrasiloxane, tetramethylammonium hydroxide, 3-glycidyloxypropylmethyldiethoxysilane, hexamethyldisiloxane, and deionized water were mixed, nitrogen was introduced, and the mixture was reacted at a speed of 150 r / min and a temperature of 95° C. for 12 hours to produce an organosilicon epoxy resin;

[0053] Step A3: Weigh the following raw materials in parts by weight: 90 parts of base asphalt, 8 parts of modified SBS resin, 8 parts of silicone epoxy resin, 3 parts of functional filler, 0.5 parts of benzoyl peroxide, 1 part of m-phenylenediamine, 1200 parts of sand and gravel aggregate and 120 parts of mineral powder, mix the base asphalt, modified SBS resin, silicone epoxy resin, functional filler and benzoyl peroxide, stir at a speed of 1600 r / min and a temperature of 160°C for 40 minutes, raise the temperature to 180°C, add m-phenylenediamine, stir at a speed of 5000 r / min for 50 minutes, and obtain high wear-resistant asphalt concrete.

[0054] The molar ratio of amino groups and maleic anhydride on the modified filler described in step A1 is 1:1, the amount of p-toluenesulfonic acid is 3% of the maleic anhydride, the amount ratio of SBS resin, cyclohexane, formic acid and hydrogen peroxide is 10g:100mL:10mL:13mL, the amount of hexadecyltrimethylammonium chloride is 1% of the mass of SBS, and the SBS resin model is D1101.

[0055] The amount ratio of octamethylcyclotetrasiloxane, tetramethylammonium hydroxide, 3-glycidyloxypropylmethyldiethoxysilane, hexamethyldisiloxane and deionized water described in step A2 is 2.3 mol:2 mol:0.1 mol:3 mol:5 L.

[0056] The matrix asphalt described in step A3 is 70 grade A asphalt, the particle size of the sand and gravel aggregate is 8 mm, and the particle size of the mineral powder is 0.05 mm.

[0057] The modified filler is prepared by the following steps:

[0058] Step B1: n-octyltriethoxysilane, isopropanol, sodium hydroxide and deionized water were mixed uniformly, reacted at a speed of 150 r / min and a temperature of 95°C for 4 hours, then cooled to 25°C and reacted for 14 hours to obtain sodium tetrasiloxane tetrasilanolate. Sodium tetrasiloxane tetrasilanolate, triethylamine and tetrahydrofuran were mixed uniformly, nitrogen protection was introduced, and methyldichlorosilane was added under stirring at a speed of 80 r / min and a temperature of 3°C. After reacting for 5 hours, the temperature was raised to 40°C and the reaction was carried out for 14 hours to obtain dihydrogen cage-type silsesquioxane;

[0059] Step B2: The bamboo fiber and the sodium hydroxide solution were mixed evenly, stirred at a speed of 80 r / min and a temperature of 50° C. for 40 minutes, and then toluene and acryloyl chloride were added. The temperature was raised to 110° C. and the reaction was carried out for 10 hours to obtain functionalized fiber. The dihydrogen cage silsesquioxane, functionalized fiber, chloroplatinic acid and DMF were mixed evenly, nitrogen was introduced, and the reaction was carried out at a speed of 150 r / min and a temperature of 85° C. for 8 hours to obtain a precursor.

[0060] Step B3: Octamethylcyclotetrasiloxane, tetramethylcyclotetrasiloxane, 1,3-bis(aminopropyl)tetramethyldisiloxane, tetramethylammonium hydroxide and DMF were mixed evenly, and the mixture was reacted at a speed of 200 r / min and a temperature of 110°C for 3 hours to obtain a modifier. The precursor, modifier, platinic acid and DMF were mixed evenly, nitrogen was introduced for protection, and the mixture was reacted at a speed of 300 r / min and a temperature of 90°C for 6 hours to obtain a modified filler.

[0061] The amount ratio of n-octyltriethoxysilane, isopropyl alcohol, sodium hydroxide and deionized water described in step B1 is 55mmol:50mL:35mmol:1mL, and the amount ratio of sodium tetrasiloxane tetrasilanolate, triethylamine, tetrahydrofuran and methyldichlorosilane is 10g:4g:30mL:2.5g.

[0062] The amount ratio of the bamboo fiber, sodium hydroxide solution, toluene and acryloyl chloride described in step B2 is 2g:10mL:6mL:10g, the mass ratio of dihydrogen cage silsesquioxane and functionalized fiber is 1:5, and the amount of chloroplatinic acid is 1‰ of the mass of dihydrogen cage silsesquioxane.

[0063] The molar ratio of octamethylcyclotetrasiloxane, tetramethylcyclotetrasiloxane, 1,3-bis(aminopropyl)tetramethyldisiloxane and tetramethylammonium hydroxide in step B3 is 2.3 mol:0.1 mol:3 mol:2 mol, the mass ratio of the precursor to the modifier is 1:5, and the amount of chloroplatinic acid used is 2‰ of the mass of the modifier.

[0064] Comparative Example 1: Compared with Example 1, this comparative example does not add silicone epoxy resin, and the remaining steps are the same.

[0065] Comparative Example 2: Compared with Example 1, this comparative example uses functionalized bamboo fiber instead of the precursor, and the remaining steps are the same.

[0066] Comparative Example 3: Compared with Example 1, this comparative example uses a modifier instead of a modified filler, and the remaining steps are the same.

[0067] The asphalt concretes prepared in Examples 1-3 and Comparative Examples 1-3 were laid on a test bench of equal weight to form standard pavements. The initial weight of each standard pavement was measured, and the initial weight of each standard pavement remained consistent at 500 kg. Under normal lighting at room temperature, the pavement was rubbed 10,000 times at the same speed using rubber wheels of the same specifications and the same surface friction coefficient, with each rubbing interval of 10 seconds. The standard pavement with the test bench was then removed, and the debris on the wear-resistant recycled asphalt concrete was blown away with a hair dryer. The pavement was then weighed, and the difference between the weight and the initial weight was recorded. In accordance with the standard of JTG-E20-2011, the specimens were made into cylindrical specimens with a diameter of 100 mm and a height of 100 mm. The uniaxial compressive strength was tested at a loading rate of 1 mm / min. The test results are shown in Table 1 below.

[0068] Table 1

[0069]

[0070] It can be seen from the above table that this application has a very good wear-resistant effect.

[0071] The above content is merely an example and explanation of the concept of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined by the claims, they should all fall within the scope of protection of the present invention.

Claims

1. A production process for highly wear-resistant asphalt concrete, characterized by: The specific steps include: Step A1: After the modified filler, maleic anhydride, and DMF are mixed and reacted, the temperature is increased and p-toluenesulfonic acid is added and the reaction is continued to produce a functional filler. SBS resin is dissolved in cyclohexane, formic acid and hydrogen peroxide are added, and the mixture is stirred and hexadecyltrimethylammonium chloride is added and reacted to produce a modified SBS resin. Step A2: Octamethylcyclotetrasiloxane, tetramethylammonium hydroxide, 3-glycidyloxypropylmethyldiethoxysilane, hexamethyldisiloxane and deionized water are mixed, nitrogen is introduced for protection, and the mixture is reacted to prepare an organosilicon epoxy resin; Step A3: Weigh the following raw materials in parts by weight: 70-90 parts of base asphalt, 5-8 parts of modified SBS resin, 5-8 parts of silicone epoxy resin, 2-3 parts of functional filler, 0.1-0.5 parts of benzoyl peroxide, 0.5-1 parts of m-phenylenediamine, 1000-1200 parts of sand and gravel aggregate and 80-120 parts of mineral powder, mix the raw materials evenly, and prepare high wear-resistant asphalt concrete.

2. The production process of a highly wear-resistant asphalt concrete according to claim 1, characterized in that: The molar ratio of amino groups and maleic anhydride on the modified filler described in step A1 is 1:1, and the amount ratio of SBS resin, cyclohexane, formic acid and hydrogen peroxide is 10g:100mL:10mL:13mL.

3. The production process of a highly wear-resistant asphalt concrete according to claim 1, characterized in that: The amount ratio of octamethylcyclotetrasiloxane, tetramethylammonium hydroxide, 3-glycidyloxypropylmethyldiethoxysilane, hexamethyldisiloxane and deionized water described in step A2 is 2.3 mol:2 mol:0.1 mol:3 mol:5 L.

4. The production process of a highly wear-resistant asphalt concrete according to claim 1, characterized in that: The modified filler is prepared by the following steps: Step B1: n-octyltriethoxysilane, isopropyl alcohol, sodium hydroxide and deionized water are mixed to react to prepare sodium tetrasiloxane tetrasilanolate, sodium tetrasiloxane tetrasilanolate, triethylamine and tetrahydrofuran are uniformly mixed, nitrogen is passed through, and methyldichlorosilane is added with stirring to react to prepare dihydrogen cage-type silsesquioxane; Step B2: After mixing and stirring bamboo fiber and sodium hydroxide solution, toluene and acryloyl chloride are added, and the temperature is raised to react to obtain functionalized fiber; dihydrogen cage silsesquioxane, functionalized fiber, chloroplatinic acid and DMF are evenly mixed, and nitrogen protection is introduced to react to obtain a precursor; Step B3: octamethylcyclotetrasiloxane, tetramethylcyclotetrasiloxane, 1,3-bis(aminopropyl)tetramethyldisiloxane, tetramethylammonium hydroxide and DMF are mixed and reacted to obtain a modifier, and the precursor, modifier, platinic acid and DMF are uniformly mixed, nitrogen protection is introduced, and the reaction is carried out to obtain a modified filler.

5. The production process of a highly wear-resistant asphalt concrete according to claim 4, characterized in that: The amount ratio of n-octyltriethoxysilane, isopropyl alcohol, sodium hydroxide and deionized water described in step B1 is 55mmol:50mL:35mmol:1mL, and the amount ratio of sodium tetrasiloxane tetrasilanolate, triethylamine, tetrahydrofuran and methyldichlorosilane is 10g:4g:30mL:2.5g.

6. The production process of a highly wear-resistant asphalt concrete according to claim 4, characterized in that: The amount ratio of the bamboo fiber, sodium hydroxide solution, toluene and acryloyl chloride described in step B2 is 2g:10mL:6mL:10g, and the mass ratio of dihydrogen cage silsesquioxane to functionalized fiber is 1:

5.

7. The production process of high wear-resistant asphalt concrete according to claim 4, characterized in that: The molar ratio of octamethylcyclotetrasiloxane, tetramethylcyclotetrasiloxane, 1,3-bis(aminopropyl)tetramethyldisiloxane and tetramethylammonium hydroxide described in step B3 is 2.3 mol:0.1 mol:3 mol:2 mol, and the mass ratio of the precursor to the modifier is 1:5.

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