CN112942009A

CN112942009A - Indentation-proof asphalt pavement and modified asphalt

Info

Publication number: CN112942009A
Application number: CN202110130040.8A
Authority: CN
Inventors: 袁臻; 杨毅; 苑显鹏
Original assignee: Modern Investment Co ltd
Current assignee: Modern Investment Co ltd
Priority date: 2021-01-29
Filing date: 2021-01-29
Publication date: 2021-06-11

Abstract

The invention relates to an indentation-proof asphalt pavement and modified asphalt, wherein the indentation-proof asphalt pavement comprises a first road surface layer, a second road surface layer and a third road surface layer; the first road surface layer is laid on the road surface base layer, the first road surface layer partially permeates into the road surface base layer and is stacked on the surface of the road surface base layer with the thickness of 8-12mm, the second road surface layer partially permeates into the first road surface layer and is stacked on the surface of the first road surface layer with the thickness of 7-10mm, and the third road surface layer partially permeates into the second road surface layer and is stacked on the surface of the second road surface layer with the thickness of 15-20 mm; the first pavement layer adopts the raw materials comprising first modified asphalt, crushed stone, steel slag and the like; the raw materials adopted by the second road surface layer comprise second modified asphalt, modified basalt fiber and the like; the raw materials of the third path surface layer comprise third modified asphalt, talcum powder and the like. The asphalt pavement provided by the invention has good indentation resistance, high temperature resistance and freezing resistance, can prolong the service life of the asphalt pavement, reduce the maintenance and repair cost, and improve the transportation efficiency and driving safety of road traffic.

Description

Indentation-proof asphalt pavement and modified asphalt

Technical Field

The invention relates to the technical field of road engineering, in particular to an indentation-proof asphalt pavement and modified asphalt.

Background

With the rapid development of economic construction, the construction of high-grade roads is also changing day by day. The asphalt pavement is widely applied due to the advantages of high driving comfort, convenient maintenance, high traffic speed and the like, and plays a vital role in a highway traffic network when the proportion of the total mileage of the asphalt pavement in a highway reaches more than 90 percent. However, in the use process of the existing asphalt pavement, along with the increasing traffic volume and the serious overload problem, the asphalt pavement is often subjected to the conditions of indentation, cracks and the like due to the influence of environmental conditions such as heavy rain, high temperature and the like, the transportation efficiency and the driving safety of road traffic are seriously influenced, the service life of the pavement is also greatly influenced, and the maintenance and repair cost is increased. Therefore, it is important to develop a novel modified asphalt to improve the indentation resistance and high temperature resistance of asphalt pavement.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide the indentation-proof asphalt pavement and the modified asphalt, so as to improve the indentation-proof performance, the high temperature resistance and the freezing resistance of the asphalt pavement, prolong the service life of the asphalt pavement, reduce the maintenance and repair cost, and improve the transportation efficiency and the driving safety of road traffic.

In order to achieve the purpose, the technical scheme provided by the invention is as follows:

the invention provides an indentation-proof asphalt pavement, which comprises a first road surface layer, a second road surface layer and a third road surface layer; the first road surface layer is laid on the road surface base layer, the first road surface layer partially permeates into the road surface base layer and is stacked on the surface of the road surface base layer with the thickness of 8-12mm, the second road surface layerThe two road surface layers partially penetrate into the first road surface layer and are stacked on the surface of the first road surface layer with the thickness of 7-10mm, and the third road surface layer partially penetrates into the second road surface layer and is stacked on the surface of the second road surface layer with the thickness of 15-20 mm; the first pavement layer comprises the following raw material components in parts by weight: 30-40 parts of first modified asphalt, 20-24 parts of crushed stone, 15-20 parts of steel slag, 25-30 parts of limestone mineral powder and 5-10 parts of basalt coarse aggregate; the second pavement layer comprises the following raw material components in parts by weight: 20-30 parts of second modified asphalt, 1-1.4 parts of modified basalt fiber, 20-28 parts of calcite powder and 6-10 parts of modified epoxy resin; the third surface layer comprises the following raw material components in parts by weight: 45-55 parts of third modified asphalt, 15-20 parts of talcum powder, 4-8 parts of titanium dioxide, 0.5-1 part of triethanolamine and 2-5 parts of sodium lignosulfonate. The indentation-proof asphalt pavement provided by the invention can be characterized in that a base layer can be laid on a pavement base layer, then a first pavement layer is laid, the thickness and the material selection of the base layer can be laid according to actual needs, the base layer can comprise an oil-permeable layer, an oil felt layer, the base layer and the like, and the thickness can be selected according to actual needs; the paving method of the foundation layer can be as follows: firstly, cleaning a pavement base layer, flattening the pavement base layer to ensure that the pavement base layer is clean and free of quality defects, then spreading anionic emulsified asphalt prime coat oil on the flattened pavement base layer, paving a layer of asphalt felt on the surface after the prime coat oil is soaked into the pavement base layer, and paving the base layer above the asphalt felt layer. The basalt coarse aggregate adopted by the invention is preferably as follows: the average grain diameter is 5-7.5mm, the mass ratio of the grains with the grain diameter less than 3mm, the grains with the grain diameter less than 2mm and the grains with the grain diameter less than 1mm in the macadam is 1: (0.65-0.55): (0.1-0.3); the preferred grain size of the steel slag is less than 3 mm; the limestone mineral powder is preferably S95 mineral powder with specific surface area less than or equal to 400m²Kg, a fluidity ratio of 95%, an activity index of 75% at 7d and an activity index of 95% at 28 d.

In the indentation-proof asphalt pavement provided by the invention, the preparation method of the first modified asphalt comprises the following steps: mixing the matrix pitch and lignocellulose in the ratio of (15-20): 1, heating to 180-200 ℃, adding a modifier, and stirring at 3000-4000r/min for 50-60min to obtain first modified asphalt; wherein the mass ratio of the modifier to the lignocellulose is (0.6-0.8): 1. preferably, the raw material components of the modifier comprise the following components in parts by weight: 4-6 parts of alumina powder, 20-40 parts of acetoacetoxyethyl methacrylate, 11-13 parts of manganese carbonate, 2-4 parts of N-methylmorpholine oxide, 5-7 parts of ethanol aqueous solution with the volume fraction of 40% -45%, 1-2 parts of silane coupling agent KH 550and 2-3 parts of N-methylpyrrolidone; the preparation method of the modifier comprises the following steps: mixing alumina powder, acetoacetoxyethyl methacrylate and an ethanol aqueous solution, grinding for 10-20min, adding other residual raw material components, stirring at the speed of 600-800r/min for 30-50min, heating to 80-90 ℃, preserving heat, and stirring for 3-5h to obtain the modifier. The first modified asphalt in the invention adopts the matrix asphalt which is preferably No. 70 matrix asphalt, wherein the saturated component content is 9-20 wt%, the aromatic component content is 41-60 wt%, the colloid content is 10-17 wt%, the asphaltene content is 8-15 wt%, the softening point is 46-48 ℃, the needle penetration at 25 ℃ is 65-69, the wax content is less than 2.0%, the ductility at 10 ℃ is more than 32cm, and the flash point is more than 300 ℃.

In the indentation-proof asphalt pavement provided by the invention, the second modified asphalt comprises the following raw material components in parts by weight: 240 parts of matrix asphalt, 1-2 parts of hydroxypropyl methyl cellulose, 2-4 parts of stearic acid amide, 1-2 parts of hydroxyethyl methacrylate, 8-10 parts of dibutyl phthalate, 2-5 parts of urea, 1-3 parts of melamine phosphate, 3-5 parts of diethanolamine, 2-6 parts of silicone oil, 1-3 parts of molybdenum disulfide, 15-20 parts of ethyl acrylate and 20-25 parts of N-hydroxymethyl acrylamide. Preferably, the preparation method of the second modified asphalt comprises the steps of: mixing matrix asphalt, hydroxypropyl methyl cellulose, stearic acid amide, hydroxyethyl methacrylate and dibutyl phthalate, then mixing, keeping the pressure at 0.15-0.2MPa all the time, heating the mixer to 145-165 ℃ at the heating rate of 0.5-1 ℃/min, mixing for 140min, adding other residual raw material components, heating to 180-190 ℃ at the temperature of 1-2 ℃/min, and continuously mixing for 210min to obtain the second modified asphalt. The base asphalt used in the second modified asphalt of the present invention is preferably No. 90 base asphalt.

In the indentation-proof asphalt pavement provided by the invention, the preparation method of the third modified asphalt comprises the following steps: heating the matrix asphalt to 140-; wherein the mass ratio of the matrix asphalt, the polybutylene terephthalate, the divinylbenzene and the carbon aerogel is (35-40): (5-6): (0.25-0.30): 1. preferably, the preparation method of the carbon aerogel comprises the following steps: dissolving 4-5 parts of hydroquinone in 25-30 parts of water by weight, adding 0.2-0.4 part of potassium chloride, stirring uniformly, adding 5-7 parts of furfural to obtain a white viscous solution, placing the white viscous solution in a water bath at the temperature of 55-65 ℃ for reacting for 8-10 hours, and gradually turning the reaction solution into black to generate a hydrogel microsphere solution; and (3) washing the hydrogel microsphere solution with water until the pH value is not changed any more, filtering to remove filtrate, and carbonizing the obtained product at the temperature of 900-1000 ℃ for 3-5h to obtain the carbon aerogel. The base asphalt used in the third modified asphalt of the present invention is preferably No. 70 base asphalt.

In the invention, the first modified asphalt and the preparation method thereof, the second modified asphalt and the preparation method thereof, and the third modified asphalt and the preparation method thereof, and the applications of the first modified asphalt, the second modified asphalt and the third modified asphalt in the anti-indentation asphalt pavement are all within the protection scope of the invention.

The preparation method of the modified basalt fiber in the indentation-preventing asphalt pavement provided by the invention comprises the following steps: cutting basalt fibers into sections, soaking in a 0.5-2mol/L hydrochloric acid solution for 0.5-1.5h, taking out, drying, then soaking in a 1, 4-butanediol dimethacrylate solution for 0.5-1h, and taking out to obtain modified basalt fibers; wherein, the 1, 4-butanediol dimethacrylate solution is prepared by mixing 1, 4-butanediol dimethacrylate of every 0.3mol with 1L of 0.5M NaCl solution.

The preparation method of the modified epoxy resin in the anti-indentation asphalt pavement provided by the invention comprises the following steps: mixing 2-3 parts of bisphenol A epoxy resin and 1.5-1.9 parts of bismaleimide, stirring for 1-2h at the temperature of 100 ℃ and 120 ℃, then cooling to 40-50 ℃ at the cooling rate of 0.8-1.0 ℃/min, adding 2.2-3.4 parts of methyltetrahydrophthalic anhydride, continuing to stir for 30-40min, then adding 1.4-2.8 parts of methyl isobutyl ketone, 0.8-2.8 parts of diboron trioxide and 2-3 parts of strontium chromate, and continuing to stir for 60-80min to obtain the modified epoxy resin.

The invention also provides a laying method of the indentation-proof asphalt pavement, which comprises the following steps: cleaning a pavement base layer, rolling, uniformly mixing raw material components of a first pavement layer, unloading the mixture to the surface of the pavement base layer, and uniformly spreading, compacting and ironing the mixture by using a spreading machine to form the first pavement layer; uniformly mixing the raw material components of the second pavement layer, unloading the mixture to the surface of the first pavement layer, and uniformly spreading, compacting and ironing the mixture by using a spreading machine to form the second pavement layer; then mixing the raw material components of the third path of surface layer, heating to 130-150 ℃, spraying the obtained mixture to the surface of the second path of surface layer, uniformly spreading by using a spreading machine, and rolling and compacting to form the third path of surface layer; and then reversely driving the paver to carry out repressing until the road surface is smooth and compacted.

The technical scheme provided by the invention has the following beneficial effects: (1) the invention creatively provides three different modified asphalts which are respectively prepared by different raw materials and specific processes, and the prepared modified asphalts have different performances and can meet the performance requirements of different layers of asphalt pavements; (2) the invention can obviously improve the compressive strength and the flexural strength of the paved asphalt pavement by specifically adopting different modified asphalts at different layers, has good high temperature resistance and freezing resistance, can effectively prevent indentation, can prolong the service life of the asphalt pavement, reduce the maintenance and repair cost, improve the transportation efficiency and the driving safety of road traffic, and has higher social benefit.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Detailed Description

The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby. The experimental procedures in the following examples are conventional unless otherwise specified. The test materials used in the following examples were purchased from a conventional reagent store unless otherwise specified. In the quantitative tests in the following examples, three replicates were set, and the data are the mean or the mean ± standard deviation of the three replicates.

The invention provides an indentation-proof asphalt pavement, which comprises a first road surface layer, a second road surface layer and a third road surface layer; the first road surface layer is laid on the road surface base layer, the first road surface layer partially permeates into the road surface base layer and is stacked on the surface of the road surface base layer for 8-12mm in thickness, the second road surface layer partially permeates into the first road surface layer and is stacked on the surface of the first road surface layer for 7-10mm in thickness, and the third road surface layer partially permeates into the second road surface layer and is stacked on the surface of the second road surface layer for 15-20mm in thickness.

The first pavement layer comprises the following raw material components in parts by weight: 30-40 parts of first modified asphalt, 20-24 parts of crushed stone, 15-20 parts of steel slag, 25-30 parts of limestone mineral powder and 5-10 parts of basalt coarse aggregate; the preparation method of the first modified asphalt comprises the following steps: mixing No. 70 matrix asphalt and lignocellulose in the weight ratio of (15-20): 1, heating to 180-200 ℃, and then adding a modifier, wherein the mass ratio of the modifier to the lignocellulose is (0.6-0.8): 1, stirring for 50-60min at the speed of 3000-4000r/min to obtain first modified asphalt; the modifier comprises the following raw material components in parts by weight: 4-6 parts of alumina powder, 20-40 parts of acetoacetoxyethyl methacrylate, 11-13 parts of manganese carbonate, 2-4 parts of N-methylmorpholine oxide, 5-7 parts of ethanol aqueous solution with the volume fraction of 40% -45%, 1-2 parts of silane coupling agent KH 550and 2-3 parts of N-methylpyrrolidone; the preparation method of the modifier comprises the following steps: mixing alumina powder, acetoacetoxyethyl methacrylate and an ethanol aqueous solution, grinding for 10-20min, adding other residual raw material components, stirring at the speed of 600-800r/min for 30-50min, heating to 80-90 ℃, preserving heat, and stirring for 3-5h to obtain the modifier.

The second pavement layer comprises the following raw material components in parts by weight: 20-30 parts of second modified asphalt, 1-1.4 parts of modified basalt fiber, 20-28 parts of calcite powder and 6-10 parts of modified epoxy resin; the second modified asphalt comprises the following raw material components in parts by weight: 240 parts of No. 90 matrix asphalt, 1-2 parts of hydroxypropyl methyl cellulose, 2-4 parts of stearic amide, 1-2 parts of hydroxyethyl methacrylate, 8-10 parts of dibutyl phthalate, 2-5 parts of urea, 1-3 parts of melamine phosphate, 3-5 parts of diethanolamine, 2-6 parts of silicone oil, 1-3 parts of molybdenum disulfide, 15-20 parts of ethyl acrylate and 20-25 parts of N-hydroxymethyl acrylamide; the preparation method of the second modified asphalt comprises the following steps: mixing 90 # matrix asphalt, hydroxypropyl methylcellulose, stearic acid amide, hydroxyethyl methacrylate and dibutyl phthalate, then mixing, keeping the pressure at 0.15-0.2MPa all the time, heating the mixer to 145-165 ℃ at the heating rate of 0.5-1 ℃/min, mixing for 120-140min, adding other residual raw material components, heating to 180-190 ℃ at the temperature of 1-2 ℃/min, and continuing mixing for 200-210min to obtain second modified asphalt; the preparation method of the modified basalt fiber comprises the following steps: cutting basalt fibers into sections, soaking in a 0.5-2mol/L hydrochloric acid solution for 0.5-1.5h, taking out, drying, then soaking in a 1, 4-butanediol dimethacrylate solution for 0.5-1h, and taking out to obtain modified basalt fibers; wherein, the 1, 4-butanediol dimethacrylate solution is prepared by mixing 1, 4-butanediol dimethacrylate of every 0.3mol with 1L of 0.5M NaCl solution; the preparation method of the modified epoxy resin comprises the following steps: mixing 2-3 parts of bisphenol A epoxy resin and 1.5-1.9 parts of bismaleimide, stirring for 1-2h at the temperature of 100 ℃ and 120 ℃, then cooling to 40-50 ℃ at the cooling rate of 0.8-1.0 ℃/min, adding 2.2-3.4 parts of methyltetrahydrophthalic anhydride, continuing to stir for 30-40min, then adding 1.4-2.8 parts of methyl isobutyl ketone, 0.8-2.8 parts of diboron trioxide and 2-3 parts of strontium chromate, and continuing to stir for 60-80min to obtain the modified epoxy resin.

The third surface layer comprises the following raw material components in parts by weight: 45-55 parts of third modified asphalt, 15-20 parts of talcum powder, 4-8 parts of titanium dioxide, 0.5-1 part of triethanolamine and 2-5 parts of sodium lignosulfonate; the preparation method of the third modified asphalt comprises the following steps: heating No. 70 matrix asphalt to 140-150 ℃, adding polybutylene terephthalate and divinylbenzene, shearing and stirring for 8-10min at the speed of 3500-7000 r/min, then adding carbon aerogel, shearing and stirring for 15-18min at the speed of 6500-7000r/min, and obtaining third modified asphalt; wherein the mass ratio of the matrix asphalt, the polybutylene terephthalate, the divinylbenzene and the carbon aerogel is (35-40): (5-6): (0.25-0.30): 1; the preparation method of the carbon aerogel comprises the following steps: dissolving 4-5 parts of hydroquinone in 25-30 parts of water by weight, adding 0.2-0.4 part of potassium chloride, stirring uniformly, adding 5-7 parts of furfural to obtain a white viscous solution, placing the white viscous solution in a water bath at the temperature of 55-65 ℃ for reacting for 8-10 hours, and gradually turning the reaction solution into black to generate a hydrogel microsphere solution; and (3) washing the hydrogel microsphere solution with water until the pH value is not changed any more, filtering to remove filtrate, and carbonizing the obtained product at the temperature of 900-1000 ℃ for 3-5h to obtain the carbon aerogel.

The invention also provides a paving method of the indentation-proof asphalt pavement, which comprises the following steps: cleaning a pavement base layer, rolling, uniformly mixing raw material components of a first pavement layer, unloading the mixture to the surface of the pavement base layer, and uniformly spreading, compacting and ironing the mixture by using a spreading machine to form the first pavement layer; uniformly mixing the raw material components of the second pavement layer, unloading the mixture to the surface of the first pavement layer, and uniformly spreading, compacting and ironing the mixture by using a spreading machine to form the second pavement layer; then mixing the raw material components of the third path of surface layer, heating to 130-150 ℃, spraying the obtained mixture to the surface of the second path of surface layer, uniformly spreading by using a spreading machine, and rolling and compacting to form the third path of surface layer; and then reversely driving the paver to carry out repressing until the road surface is smooth and compacted.

The technical solution provided by the present invention is further illustrated below with reference to specific examples.

Example 1

The embodiment provides an indentation-proof asphalt pavement, which comprises a first pavement layer, a second pavement layer and a third pavement layer; the first road surface layer is laid on the road surface base layer, the first road surface layer partially permeates into the road surface base layer and is stacked with the thickness of 8mm on the surface of the road surface base layer, the second road surface layer partially permeates into the first road surface layer and is stacked with the thickness of 7mm on the surface of the first road surface layer, and the third road surface layer partially permeates into the second road surface layer and is stacked with the thickness of 15mm on the surface of the second road surface layer.

The first pavement layer comprises the following raw material components in parts by weight: 30 parts of first modified asphalt, 24 parts of crushed stone, 15 parts of steel slag, 30 parts of limestone mineral powder and 5 parts of basalt coarse aggregate; the preparation method of the first modified asphalt comprises the following steps: number 70 matrix pitch and lignocellulose were mixed at 15: 1, heating to 180 ℃, and then adding a modifier, wherein the mass ratio of the modifier to the lignocellulose is 0.6: 1, stirring for 50min at the speed of 3000r/min to obtain first modified asphalt; the modifier comprises the following raw material components in parts by weight: 4 parts of alumina powder, 40 parts of acetoacetoxyethyl methacrylate, 11 parts of manganese carbonate, 4 parts of N-methylmorpholine oxide, 5 parts of ethanol aqueous solution with the volume fraction of 40%, KH 5502 parts of silane coupling agent and 2 parts of N-methylpyrrolidone; the preparation method of the modifier comprises the following steps: mixing alumina powder, acetoacetoxyethyl methacrylate and an ethanol aqueous solution, grinding for 10min, adding other residual raw material components, stirring at a speed of 600r/min for 30min, heating to 80 ℃, preserving heat, and stirring for 3h to obtain the modifier.

The second pavement layer comprises the following raw material components in parts by weight: 20 parts of second modified asphalt, 1.4 parts of modified basalt fiber, 20 parts of calcite powder and 10 parts of modified epoxy resin; the second modified asphalt comprises the following raw material components in parts by weight: 200 parts of No. 90 matrix asphalt, 2 parts of hydroxypropyl methyl cellulose, 2 parts of stearic acid amide, 2 parts of hydroxyethyl methacrylate, 8 parts of dibutyl phthalate, 5 parts of urea, 1 part of melamine phosphate, 5 parts of diethanolamine, 2 parts of silicone oil, 3 parts of molybdenum disulfide, 15 parts of ethyl acrylate and 25 parts of N-hydroxymethyl acrylamide; the preparation method of the second modified asphalt comprises the following steps: mixing No. 90 matrix asphalt, hydroxypropyl methyl cellulose, stearic acid amide, hydroxyethyl methacrylate and dibutyl phthalate, then mixing, keeping the pressure at 0.15MPa all the time, heating the mixer to 145 ℃ at the heating rate of 0.5 ℃/min, mixing for 120min, adding other residual raw material components, heating to 180 ℃ at the temperature of 1 ℃/min, and continuing mixing for 200min to obtain second modified asphalt; the preparation method of the modified basalt fiber comprises the following steps: cutting basalt fibers into sections, soaking in a 0.5mol/L hydrochloric acid solution for 0.5h, taking out, drying, then soaking in a 1, 4-butanediol dimethacrylate solution for 0.5h, and taking out to obtain modified basalt fibers; wherein, the 1, 4-butanediol dimethacrylate solution is prepared by mixing 1, 4-butanediol dimethacrylate of every 0.3mol with 1L of 0.5M NaCl solution; the preparation method of the modified epoxy resin comprises the following steps: mixing 2 parts by weight of bisphenol A epoxy resin and 1.5 parts by weight of bismaleimide, stirring for 1 hour at 100 ℃, then cooling to 40 ℃ at a cooling rate of 0.8 ℃/min, adding 2.2 parts by weight of methyl tetrahydrophthalic anhydride, continuing to stir for 30 minutes, then adding 1.4 parts by weight of methyl isobutyl ketone, 0.8 parts by weight of boron trioxide and 2 parts by weight of strontium chromate, and continuing to stir for 60 minutes to obtain the modified epoxy resin.

The third surface layer comprises the following raw material components in parts by weight: 45 parts of third modified asphalt, 20 parts of talcum powder, 4 parts of titanium dioxide, 1 part of triethanolamine and 2 parts of sodium lignosulfonate; the preparation method of the third modified asphalt comprises the following steps: heating No. 70 matrix asphalt to 140 ℃, adding polybutylene terephthalate and divinylbenzene, shearing and stirring at a speed of 3500r/min for 8min, adding carbon aerogel, shearing and stirring at a speed of 6500r/min for 15min, and obtaining third modified asphalt; wherein the mass ratio of the matrix asphalt to the polybutylene terephthalate to the divinylbenzene to the carbon aerogel is 35: 5: 0.25: 1; the preparation method of the carbon aerogel comprises the following steps: dissolving 4 parts by weight of hydroquinone in 25 parts by weight of water, adding 0.2 part by weight of potassium chloride, stirring uniformly, adding 5 parts by weight of furfural to obtain a white viscous solution, and then placing the white viscous solution in a water bath at 55 ℃ for reacting for 8 hours, wherein the reaction solution gradually becomes black to generate a hydrogel microsphere solution; and (3) washing the hydrogel microsphere solution with water until the pH value is not changed any more, filtering to remove filtrate, and carbonizing the obtained product at 900 ℃ for 3h to obtain the carbon aerogel.

The paving method of the indentation-proof asphalt pavement comprises the following steps: cleaning a pavement base layer, rolling, uniformly mixing raw material components of a first pavement layer, unloading the mixture to the surface of the pavement base layer, and uniformly spreading, compacting and ironing the mixture by using a spreading machine to form the first pavement layer; uniformly mixing the raw material components of the second pavement layer, unloading the mixture to the surface of the first pavement layer, and uniformly spreading, compacting and ironing the mixture by using a spreading machine to form the second pavement layer; then mixing the raw material components of the third path of surface layer, heating to 130 ℃, spraying the obtained mixture to the surface of the second path of surface layer, uniformly spreading by using a spreading machine, and rolling and compacting to form a third path of surface layer; and then reversely driving the paver to carry out repressing until the road surface is smooth and compacted.

Example 2

The embodiment provides an indentation-proof asphalt pavement, which comprises a first pavement layer, a second pavement layer and a third pavement layer; the first road surface layer is laid on the road surface base layer, the first road surface layer partially permeates into the road surface base layer and is stacked on the surface of the road surface base layer for 12mm in thickness, the second road surface layer partially permeates into the first road surface layer and is stacked on the surface of the first road surface layer for 10mm in thickness, and the third road surface layer partially permeates into the second road surface layer and is stacked on the surface of the second road surface layer for 20mm in thickness.

The first pavement layer comprises the following raw material components in parts by weight: 40 parts of first modified asphalt, 20 parts of crushed stone, 20 parts of steel slag, 25 parts of limestone mineral powder and 10 parts of basalt coarse aggregate; the preparation method of the first modified asphalt comprises the following steps: number 70 matrix pitch and lignocellulose were mixed at a 20: 1, heating to 200 ℃, and then adding a modifier, wherein the mass ratio of the modifier to the lignocellulose is 0.8: 1, stirring for 60min at the speed of 4000r/min to obtain first modified asphalt; the modifier comprises the following raw material components in parts by weight: 6 parts of alumina powder, 20 parts of acetoacetoxyethyl methacrylate, 13 parts of manganese carbonate, 2 parts of N-methylmorpholine oxide, 7 parts of 45% ethanol aqueous solution by volume fraction, KH5501 parts of silane coupling agent and 3 parts of N-methylpyrrolidone; the preparation method of the modifier comprises the following steps: mixing alumina powder, acetoacetoxyethyl methacrylate and ethanol water solution, grinding for 20min, adding other residual raw material components, stirring at the speed of 800r/min for 50min, heating to 90 ℃, preserving heat and stirring for 5h to obtain the modifier.

The second pavement layer comprises the following raw material components in parts by weight: 30 parts of second modified asphalt, 1 part of modified basalt fiber, 28 parts of calcite powder and 6 parts of modified epoxy resin; the second modified asphalt comprises the following raw material components in parts by weight: 240 parts of No. 90 matrix asphalt, 1 part of hydroxypropyl methyl cellulose, 4 parts of stearic acid amide, 1 part of hydroxyethyl methacrylate, 10 parts of dibutyl phthalate, 2 parts of urea, 3 parts of melamine phosphate, 3 parts of diethanolamine, 6 parts of silicone oil, 1 part of molybdenum disulfide, 20 parts of ethyl acrylate and 20 parts of N-hydroxymethyl acrylamide; the preparation method of the second modified asphalt comprises the following steps: mixing No. 90 matrix asphalt, hydroxypropyl methyl cellulose, stearic acid amide, hydroxyethyl methacrylate and dibutyl phthalate, then mixing, keeping the pressure at 0.2MPa all the time, heating the mixer to 165 ℃ at the heating rate of 1 ℃/min, mixing for 140min, adding other residual raw material components, heating to 190 ℃ at the temperature of 2 ℃/min, and continuing mixing for 210min to obtain second modified asphalt; the preparation method of the modified basalt fiber comprises the following steps: cutting basalt fibers into sections, soaking the sections in 2mol/L hydrochloric acid solution for 1.5h, taking out the sections, drying the sections, then soaking the sections in 1, 4-butanediol dimethacrylate solution for 1h, and taking out the sections to obtain modified basalt fibers; wherein, the 1, 4-butanediol dimethacrylate solution is prepared by mixing 1, 4-butanediol dimethacrylate of every 0.3mol with 1L of 0.5M NaCl solution; the preparation method of the modified epoxy resin comprises the following steps: mixing 3 parts by weight of bisphenol A epoxy resin and 1.9 parts by weight of bismaleimide, stirring for 2 hours at 120 ℃, then cooling to 50 ℃ at a cooling rate of 1.0 ℃/min, adding 3.4 parts by weight of methyl tetrahydrophthalic anhydride, continuing to stir for 40 minutes, then adding 2.8 parts by weight of methyl isobutyl ketone, 2.8 parts by weight of boron trioxide and 3 parts by weight of strontium chromate, and continuing to stir for 80 minutes to obtain the modified epoxy resin.

The third surface layer comprises the following raw material components in parts by weight: 55 parts of third modified asphalt, 15 parts of talcum powder, 8 parts of titanium dioxide, 0.5 part of triethanolamine and 5 parts of sodium lignosulfonate; the preparation method of the third modified asphalt comprises the following steps: heating No. 70 matrix asphalt to 150 ℃, adding polybutylene terephthalate and divinylbenzene, shearing and stirring for 10min at the speed of 3700r/min, then adding carbon aerogel, shearing and stirring for 18min at the speed of 7000r/min, and obtaining third modified asphalt; wherein the mass ratio of the matrix asphalt, the polybutylene terephthalate, the divinylbenzene and the carbon aerogel is 40: 6: 0.30: 1; the preparation method of the carbon aerogel comprises the following steps: dissolving 5 parts by weight of hydroquinone in 30 parts by weight of water, adding 0.4 part by weight of potassium chloride, uniformly stirring, adding 7 parts by weight of furfural to obtain a white viscous solution, and then placing the white viscous solution in a water bath at 65 ℃ for reaction for 10 hours, wherein the reaction solution gradually becomes black to generate a hydrogel microsphere solution; and (3) washing the hydrogel microsphere solution with water until the pH value is not changed any more, filtering to remove filtrate, and carbonizing the obtained product at 1000 ℃ for 5 hours to obtain the carbon aerogel.

The paving method of the indentation-proof asphalt pavement comprises the following steps: cleaning a pavement base layer, rolling, uniformly mixing raw material components of a first pavement layer, unloading the mixture to the surface of the pavement base layer, and uniformly spreading, compacting and ironing the mixture by using a spreading machine to form the first pavement layer; uniformly mixing the raw material components of the second pavement layer, unloading the mixture to the surface of the first pavement layer, and uniformly spreading, compacting and ironing the mixture by using a spreading machine to form the second pavement layer; then mixing the raw material components of the third path of surface layer, heating to 150 ℃, spraying the obtained mixture to the surface of the second path of surface layer, uniformly spreading by using a spreading machine, and rolling and compacting to form a third path of surface layer; and then reversely driving the paver to carry out repressing until the road surface is smooth and compacted.

Example 3

The embodiment provides an indentation-proof asphalt pavement, which comprises a first pavement layer, a second pavement layer and a third pavement layer; the first road surface layer is laid on the road surface base layer, the first road surface layer partially permeates into the road surface base layer and is stacked on the surface of the road surface base layer for 10mm in thickness, the second road surface layer partially permeates into the first road surface layer and is stacked on the surface of the first road surface layer for 9mm in thickness, and the third road surface layer partially permeates into the second road surface layer and is stacked on the surface of the second road surface layer for 18mm in thickness.

The first pavement layer comprises the following raw material components in parts by weight: 35 parts of first modified asphalt, 224 parts of crushed stone, 17 parts of steel slag, 26 parts of limestone mineral powder and 9 parts of basalt coarse aggregate; the preparation method of the first modified asphalt comprises the following steps: number 70 matrix pitch and lignocellulose were mixed at 16: 1, heating to 190 ℃, and then adding a modifier, wherein the mass ratio of the modifier to the lignocellulose is 0.7: 1, stirring for 55min at a speed of 3500r/min to obtain first modified asphalt; the modifier comprises the following raw material components in parts by weight: 5 parts of alumina powder, 30 parts of acetoacetoxyethyl methacrylate, 12 parts of manganese carbonate, 3 parts of N-methylmorpholine oxide, 6 parts of ethanol aqueous solution with the volume fraction of 42%, KH 5501.5 parts of silane coupling agent and 2.5 parts of N-methylpyrrolidone; the preparation method of the modifier comprises the following steps: mixing alumina powder, acetoacetoxyethyl methacrylate and an ethanol aqueous solution, grinding for 15min, adding other residual raw material components, stirring at the speed of 700r/min for 40min, heating to 85 ℃, preserving heat and stirring for 4h to obtain the modifier.

The second pavement layer comprises the following raw material components in parts by weight: 25 parts of second modified asphalt, 1.2 parts of modified basalt fiber, 24 parts of calcite powder and 8 parts of modified epoxy resin; the second modified asphalt comprises the following raw material components in parts by weight: 220 parts of No. 90 matrix asphalt, 1.5 parts of hydroxypropyl methyl cellulose, 3 parts of stearic amide, 1.5 parts of hydroxyethyl methacrylate, 9 parts of dibutyl phthalate, 3 parts of urea, 2 parts of melamine phosphate, 4 parts of diethanolamine, 4 parts of silicone oil, 2 parts of molybdenum disulfide, 18 parts of ethyl acrylate and 22 parts of N-hydroxymethyl acrylamide; the preparation method of the second modified asphalt comprises the following steps: mixing No. 90 matrix asphalt, hydroxypropyl methyl cellulose, stearic acid amide, hydroxyethyl methacrylate and dibutyl phthalate, then mixing, keeping the pressure at 0.18MPa all the time, heating the mixer to 155 ℃ at the heating rate of 0.7 ℃/min, mixing for 130min, adding other residual raw material components, heating to 185 ℃ at the temperature of 1.5 ℃/min, and continuing mixing for 205min to obtain second modified asphalt; the preparation method of the modified basalt fiber comprises the following steps: cutting basalt fibers into sections, soaking in 1.2mol/L hydrochloric acid solution for 1h, taking out, drying, then soaking in 1, 4-butanediol dimethacrylate solution for 0.8h, and taking out to obtain modified basalt fibers; wherein, the 1, 4-butanediol dimethacrylate solution is prepared by mixing 1, 4-butanediol dimethacrylate of every 0.3mol with 1L of 0.5M NaCl solution; the preparation method of the modified epoxy resin comprises the following steps: mixing 2.5 parts of bisphenol A epoxy resin and 1.7 parts of bismaleimide, stirring for 1.5 hours at 110 ℃, then cooling to 45 ℃ at a cooling rate of 0.9 ℃/min, adding 2.8 parts of methyltetrahydrophthalic anhydride, continuing to stir for 35 minutes, then adding 2.0 parts of methyl isobutyl ketone, 1.6 parts of boron trioxide and 2.5 parts of strontium chromate, and continuing to stir for 70 minutes to obtain the modified epoxy resin.

The third surface layer comprises the following raw material components in parts by weight: 50 parts of third modified asphalt, 18 parts of talcum powder, 6 parts of titanium dioxide, 0.8 part of triethanolamine and 4 parts of sodium lignosulfonate; the preparation method of the third modified asphalt comprises the following steps: heating No. 70 matrix asphalt to 145 ℃, adding polybutylene terephthalate and divinylbenzene, shearing and stirring at the speed of 3600r/min for 9min, then adding carbon aerogel, shearing and stirring at the speed of 6800r/min for 16min, and obtaining third modified asphalt; wherein the mass ratio of the matrix asphalt, the polybutylene terephthalate, the divinylbenzene and the carbon aerogel is 38: 5.5: 0.26: 1; the preparation method of the carbon aerogel comprises the following steps: dissolving 4.5 parts by weight of hydroquinone in 28 parts by weight of water, adding 0.3 part by weight of potassium chloride, stirring uniformly, adding 6 parts by weight of furfural to obtain a white viscous solution, and then placing the white viscous solution in a water bath at 60 ℃ for reaction for 9 hours, wherein the reaction solution gradually becomes black to generate a hydrogel microsphere solution; and (3) washing the hydrogel microsphere solution with water until the pH value is not changed any more, filtering to remove filtrate, and carbonizing the obtained product at 950 ℃ for 4 hours to obtain the carbon aerogel.

The paving method of the indentation-proof asphalt pavement comprises the following steps: cleaning a pavement base layer, rolling, uniformly mixing raw material components of a first pavement layer, unloading the mixture to the surface of the pavement base layer, and uniformly spreading, compacting and ironing the mixture by using a spreading machine to form the first pavement layer; uniformly mixing the raw material components of the second pavement layer, unloading the mixture to the surface of the first pavement layer, and uniformly spreading, compacting and ironing the mixture by using a spreading machine to form the second pavement layer; then mixing the raw material components of the third path of surface layer, heating to 140 ℃, spraying the obtained mixture to the surface of the second path of surface layer, uniformly spreading by using a spreading machine, and rolling and compacting to form a third path of surface layer; and then reversely driving the paver to carry out repressing until the road surface is smooth and compacted.

Comparative example 1

The comparative example provides an indentation-resistant asphalt pavement, comprising a first road surface layer, a second road surface layer and a third road surface layer; the first road surface layer is laid on the road surface base layer, the first road surface layer partially permeates into the road surface base layer and is stacked on the surface of the road surface base layer for 10mm in thickness, the second road surface layer partially permeates into the first road surface layer and is stacked on the surface of the first road surface layer for 9mm in thickness, and the third road surface layer partially permeates into the second road surface layer and is stacked on the surface of the second road surface layer for 18mm in thickness.

The first pavement layer comprises the following raw material components in parts by weight: 35 parts of second modified asphalt, 224 parts of broken stone, 17 parts of steel slag, 26 parts of limestone mineral powder and 9 parts of basalt coarse aggregate; the second modified asphalt comprises the following raw material components in parts by weight: 220 parts of No. 90 matrix asphalt, 1.5 parts of hydroxypropyl methyl cellulose, 3 parts of stearic amide, 1.5 parts of hydroxyethyl methacrylate, 9 parts of dibutyl phthalate, 3 parts of urea, 2 parts of melamine phosphate, 4 parts of diethanolamine, 4 parts of silicone oil, 2 parts of molybdenum disulfide, 18 parts of ethyl acrylate and 22 parts of N-hydroxymethyl acrylamide; the preparation method of the second modified asphalt comprises the following steps: mixing No. 90 matrix asphalt, hydroxypropyl methyl cellulose, stearic acid amide, hydroxyethyl methacrylate and dibutyl phthalate, then mixing, keeping the pressure at 0.18MPa all the time, heating the mixer to 155 ℃ at the heating rate of 0.7 ℃/min, mixing for 130min, adding other residual raw material components, heating to 185 ℃ at the temperature of 1.5 ℃/min, and continuing mixing for 205min to obtain second modified asphalt.

The second pavement layer comprises the following raw material components in parts by weight: 25 parts of first modified asphalt, 1.2 parts of modified basalt fiber, 24 parts of calcite powder and 8 parts of modified epoxy resin; the preparation method of the first modified asphalt comprises the following steps: number 70 matrix pitch and lignocellulose were mixed at 16: 1, heating to 190 ℃, and then adding a modifier, wherein the mass ratio of the modifier to the lignocellulose is 0.7: 1, stirring for 55min at a speed of 3500r/min to obtain first modified asphalt; the modifier comprises the following raw material components in parts by weight: 5 parts of alumina powder, 30 parts of acetoacetoxyethyl methacrylate, 12 parts of manganese carbonate, 3 parts of N-methylmorpholine oxide, 6 parts of ethanol aqueous solution with the volume fraction of 42%, KH 5501.5 parts of silane coupling agent and 2.5 parts of N-methylpyrrolidone; the preparation method of the modifier comprises the following steps: mixing alumina powder, acetoacetoxyethyl methacrylate and an ethanol aqueous solution, grinding for 15min, adding other residual raw material components, stirring at the speed of 700r/min for 40min, heating to 85 ℃, preserving heat and stirring for 4h to obtain a modifier; the preparation method of the modified basalt fiber comprises the following steps: cutting basalt fibers into sections, soaking in 1.2mol/L hydrochloric acid solution for 1h, taking out, drying, then soaking in 1, 4-butanediol dimethacrylate solution for 0.8h, and taking out to obtain modified basalt fibers; wherein, the 1, 4-butanediol dimethacrylate solution is formed by mixing 1, 4-butanediol dimethacrylate of every 0.3mol with 1L0.5M NaCl solution; the preparation method of the modified epoxy resin comprises the following steps: mixing 2.5 parts of bisphenol A epoxy resin and 1.7 parts of bismaleimide, stirring for 1.5 hours at 110 ℃, then cooling to 45 ℃ at a cooling rate of 0.9 ℃/min, adding 2.8 parts of methyltetrahydrophthalic anhydride, continuing to stir for 35 minutes, then adding 2.0 parts of methyl isobutyl ketone, 1.6 parts of boron trioxide and 2.5 parts of strontium chromate, and continuing to stir for 70 minutes to obtain the modified epoxy resin.

Comparative example 2

The second pavement layer comprises the following raw material components in parts by weight: 25 parts of third modified asphalt, 1.2 parts of modified basalt fiber, 24 parts of calcite powder and 8 parts of modified epoxy resin; the preparation method of the third modified asphalt comprises the following steps: heating No. 70 matrix asphalt to 145 ℃, adding polybutylene terephthalate and divinylbenzene, shearing and stirring at the speed of 3600r/min for 9min, then adding carbon aerogel, shearing and stirring at the speed of 6800r/min for 16min, and obtaining third modified asphalt; wherein the mass ratio of the matrix asphalt, the polybutylene terephthalate, the divinylbenzene and the carbon aerogel is 38: 5.5: 0.26: 1; the preparation method of the carbon aerogel comprises the following steps: dissolving 4.5 parts by weight of hydroquinone in 28 parts by weight of water, adding 0.3 part by weight of potassium chloride, stirring uniformly, adding 6 parts by weight of furfural to obtain a white viscous solution, and then placing the white viscous solution in a water bath at 60 ℃ for reaction for 9 hours, wherein the reaction solution gradually becomes black to generate a hydrogel microsphere solution; washing the hydrogel microsphere solution with water until the pH value is not changed, filtering to remove filtrate, and carbonizing the obtained product at 950 ℃ for 4 hours to obtain carbon aerogel; the preparation method of the modified basalt fiber comprises the following steps: cutting basalt fibers into sections, soaking in 1.2mol/L hydrochloric acid solution for 1h, taking out, drying, then soaking in 1, 4-butanediol dimethacrylate solution for 0.8h, and taking out to obtain modified basalt fibers; wherein, the 1, 4-butanediol dimethacrylate solution is prepared by mixing 1, 4-butanediol dimethacrylate of every 0.3mol with 1L of 0.5M NaCl solution; the preparation method of the modified epoxy resin comprises the following steps: mixing 2.5 parts of bisphenol A epoxy resin and 1.7 parts of bismaleimide, stirring for 1.5 hours at 110 ℃, then cooling to 45 ℃ at a cooling rate of 0.9 ℃/min, adding 2.8 parts of methyltetrahydrophthalic anhydride, continuing to stir for 35 minutes, then adding 2.0 parts of methyl isobutyl ketone, 1.6 parts of boron trioxide and 2.5 parts of strontium chromate, and continuing to stir for 70 minutes to obtain the modified epoxy resin.

The third surface layer comprises the following raw material components in parts by weight: 50 parts of second modified asphalt, 18 parts of talcum powder, 6 parts of titanium dioxide, 0.8 part of triethanolamine and 4 parts of sodium lignosulfonate; the second modified asphalt comprises the following raw material components in parts by weight: 220 parts of No. 90 matrix asphalt, 1.5 parts of hydroxypropyl methyl cellulose, 3 parts of stearic amide, 1.5 parts of hydroxyethyl methacrylate, 9 parts of dibutyl phthalate, 3 parts of urea, 2 parts of melamine phosphate, 4 parts of diethanolamine, 4 parts of silicone oil, 2 parts of molybdenum disulfide, 18 parts of ethyl acrylate and 22 parts of N-hydroxymethyl acrylamide; the preparation method of the second modified asphalt comprises the following steps: mixing No. 90 matrix asphalt, hydroxypropyl methyl cellulose, stearic acid amide, hydroxyethyl methacrylate and dibutyl phthalate, then mixing, keeping the pressure at 0.18MPa all the time, heating the mixer to 155 ℃ at the heating rate of 0.7 ℃/min, mixing for 130min, adding other residual raw material components, heating to 185 ℃ at the temperature of 1.5 ℃/min, and continuing mixing for 205min to obtain second modified asphalt.

Comparative example 3

The second pavement layer comprises the following raw material components in parts by weight: 25 parts of first modified asphalt, 1.2 parts of modified basalt fiber, 24 parts of calcite powder and 8 parts of modified epoxy resin; wherein the preparation method of the first modified asphalt is the same as that of the first modified asphalt; the preparation method of the modified basalt fiber comprises the following steps: cutting basalt fibers into sections, soaking in 1.2mol/L hydrochloric acid solution for 1h, taking out, drying, then soaking in 1, 4-butanediol dimethacrylate solution for 0.8h, and taking out to obtain modified basalt fibers; wherein, the 1, 4-butanediol dimethacrylate solution is prepared by mixing 1, 4-butanediol dimethacrylate of every 0.3mol with 1L of 0.5M NaCl solution; the preparation method of the modified epoxy resin comprises the following steps: mixing 2.5 parts of bisphenol A epoxy resin and 1.7 parts of bismaleimide, stirring for 1.5 hours at 110 ℃, then cooling to 45 ℃ at a cooling rate of 0.9 ℃/min, adding 2.8 parts of methyltetrahydrophthalic anhydride, continuing to stir for 35 minutes, then adding 2.0 parts of methyl isobutyl ketone, 1.6 parts of boron trioxide and 2.5 parts of strontium chromate, and continuing to stir for 70 minutes to obtain the modified epoxy resin.

Comparative example 4

The third surface layer comprises the following raw material components in parts by weight: 50 parts of third modified asphalt, 18 parts of talcum powder, 6 parts of titanium dioxide, 0.8 part of triethanolamine and 4 parts of sodium lignosulfonate; the preparation method of the third modified asphalt comprises the following steps: heating No. 70 matrix asphalt to 145 ℃, adding polybutylene terephthalate and divinylbenzene, shearing and stirring at a speed of 3600r/min for 9min, and then shearing and stirring at a speed of 6800r/min for 16min to obtain third modified asphalt; wherein the mass ratio of the matrix asphalt to the polybutylene terephthalate to the divinylbenzene is 38: 5.5: 0.26.

Comparative example 5

The second pavement layer comprises the following raw material components in parts by weight: 25 parts of second modified asphalt, 1.2 parts of modified basalt fiber and 24 parts of calcite powder; the second modified asphalt comprises the following raw material components in parts by weight: 220 parts of No. 90 matrix asphalt, 1.5 parts of hydroxypropyl methyl cellulose, 3 parts of stearic amide, 1.5 parts of hydroxyethyl methacrylate, 9 parts of dibutyl phthalate, 3 parts of urea, 2 parts of melamine phosphate, 4 parts of diethanolamine, 4 parts of silicone oil, 2 parts of molybdenum disulfide, 18 parts of ethyl acrylate and 22 parts of N-hydroxymethyl acrylamide; the preparation method of the second modified asphalt comprises the following steps: mixing No. 90 matrix asphalt, hydroxypropyl methyl cellulose, stearic acid amide, hydroxyethyl methacrylate and dibutyl phthalate, then mixing, keeping the pressure at 0.18MPa all the time, heating the mixer to 155 ℃ at the heating rate of 0.7 ℃/min, mixing for 130min, adding other residual raw material components, heating to 185 ℃ at the temperature of 1.5 ℃/min, and continuing mixing for 205min to obtain second modified asphalt; the preparation method of the modified basalt fiber comprises the following steps: cutting basalt fibers into sections, soaking in 1.2mol/L hydrochloric acid solution for 1h, taking out, drying, then soaking in 1, 4-butanediol dimethacrylate solution for 0.8h, and taking out to obtain modified basalt fibers; wherein, the 1, 4-butanediol dimethacrylate solution is prepared by mixing 1, 4-butanediol dimethacrylate of every 0.3mol with 1L of 0.5M NaCl solution.

The effect of the indentation-proof asphalt pavement paved in the embodiment 1 to the embodiment 3 of the invention is evaluated by a functional test, and the indentation-proof asphalt pavement paved in the comparative example 1 to the comparative example 5 is used as a control.

1. Determination of flexural Strength Properties

The anti-indentation asphalt pavements paved in examples 1 to 3 of the present invention and comparative examples 1 to 5 were cured at normal temperature for 28d, placed at 50 ℃ for 28d in a high temperature environment, and placed at-10 ℃ for 28d in a freezing environment, and then the flexural strength thereof was measured, respectively, and the measurement results are shown in table 1 below.

TABLE 1 determination of flexural Strength Properties

2. Determination of compressive Strength Properties

The indentation-proof asphalt pavements paved according to examples 1 to 3 and comparative examples 1 to 5 of the present invention were cured and cured at normal temperature for 28d, placed at 60 ℃ for 28d in a high temperature environment, and placed at-10 ℃ for 28d in a freezing environment, and then their compressive strengths were measured, respectively, and the results are shown in table 2 below.

TABLE 2 determination of compressive Strength Properties

According to the test results, the invention adopts different modified asphalts on different layers, can obviously improve the compressive strength and the flexural strength of the paved asphalt pavement, has good high temperature resistance and freezing resistance, can effectively prevent indentation, can prolong the service life of the asphalt pavement, reduces the maintenance and repair cost, improves the transportation efficiency and the driving safety of road traffic, and has higher social benefit.

It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains. Unless specifically stated otherwise, the relative steps, numerical expressions, and values of the components and steps set forth in these embodiments do not limit the scope of the present invention. In all examples shown and described herein, unless otherwise specified, any particular value should be construed as merely illustrative, and not restrictive, and thus other examples of example embodiments may have different values.

In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention, and all of the technical solutions are covered in the protective scope of the present invention.

Claims

1. The utility model provides an anti-indentation bituminous pavement which characterized in that: the indentation-proof asphalt pavement comprises a first road surface layer, a second road surface layer and a third road surface layer; the first road surface layer is laid on the road surface base layer, the first road surface layer partially permeates into the road surface base layer and is stacked on the surface of the road surface base layer with the thickness of 8-12mm, the second road surface layer partially permeates into the first road surface layer and is stacked on the surface of the first road surface layer with the thickness of 7-10mm, and the third road surface layer partially permeates into the second road surface layer and is stacked on the surface of the second road surface layer with the thickness of 15-20 mm; the first pavement layer comprises the following raw material components in parts by weight: 30-40 parts of first modified asphalt, 20-24 parts of crushed stone, 15-20 parts of steel slag, 25-30 parts of limestone mineral powder and 5-10 parts of basalt coarse aggregate; the second pavement layer comprises the following raw material components in parts by weight: 20-30 parts of second modified asphalt, 1-1.4 parts of modified basalt fiber, 20-28 parts of calcite powder and 6-10 parts of modified epoxy resin; the third path surface layer comprises the following raw material components in parts by weight: 45-55 parts of third modified asphalt, 15-20 parts of talcum powder, 4-8 parts of titanium dioxide, 0.5-1 part of triethanolamine and 2-5 parts of sodium lignosulfonate.

2. The indentation-proof asphalt pavement according to claim 1, wherein the preparation method of the first modified asphalt comprises the following steps: mixing the matrix pitch and lignocellulose in the ratio of (15-20): 1, heating to 180-200 ℃, adding a modifier, and stirring at 3000-4000r/min for 50-60min to obtain the first modified asphalt; wherein the mass ratio of the modifier to the lignocellulose is (0.6-0.8): 1.

3. the indentation-proof asphalt pavement according to claim 2, wherein the modifier comprises the following raw material components in parts by weight: 4-6 parts of alumina powder, 20-40 parts of acetoacetoxyethyl methacrylate, 11-13 parts of manganese carbonate, 2-4 parts of N-methylmorpholine oxide, 5-7 parts of ethanol aqueous solution with the volume fraction of 40% -45%, 1-2 parts of silane coupling agent KH 550and 2-3 parts of N-methylpyrrolidone; the preparation method of the modifier comprises the following steps: mixing alumina powder, acetoacetoxyethyl methacrylate and an ethanol aqueous solution, grinding for 10-20min, adding other residual raw material components, stirring at the speed of 600-800r/min for 30-50min, heating to 80-90 ℃, preserving heat, and stirring for 3-5h to obtain the modifier.

4. The indentation-proof asphalt pavement according to claim 1, wherein the second modified asphalt comprises the following raw material components in parts by weight: 240 parts of matrix asphalt, 1-2 parts of hydroxypropyl methyl cellulose, 2-4 parts of stearic acid amide, 1-2 parts of hydroxyethyl methacrylate, 8-10 parts of dibutyl phthalate, 2-5 parts of urea, 1-3 parts of melamine phosphate, 3-5 parts of diethanolamine, 2-6 parts of silicone oil, 1-3 parts of molybdenum disulfide, 15-20 parts of ethyl acrylate and 20-25 parts of N-hydroxymethyl acrylamide.

5. The indentation-proof asphalt pavement according to claim 4, wherein the second modified asphalt is prepared by a method comprising the steps of: mixing matrix asphalt, hydroxypropyl methyl cellulose, stearic acid amide, hydroxyethyl methacrylate and dibutyl phthalate, then mixing, keeping the pressure at 0.15-0.2MPa all the time, heating the mixer to 145-165 ℃ at the heating rate of 0.5-1 ℃/min, mixing for 120-140min, adding other residual raw material components, heating to 180-190 ℃ at the temperature of 1-2 ℃/min, and continuing mixing for 200-210min to obtain the second modified asphalt.

6. The indentation-proof asphalt pavement according to claim 1,

the preparation method of the third modified asphalt comprises the following steps: heating the matrix asphalt to 140-150 ℃, adding polybutylene terephthalate and divinylbenzene, shearing and stirring for 8-10min at the speed of 3500-3700r/min, then adding carbon aerogel, shearing and stirring for 15-18min at the speed of 6500-7000r/min, and obtaining the third modified asphalt; wherein the mass ratio of the matrix asphalt, the polybutylene terephthalate, the divinylbenzene and the carbon aerogel is (35-40): (5-6): (0.25-0.30): 1.

7. the indentation-proof asphalt pavement according to claim 6, wherein the carbon aerogel is prepared by a method comprising the steps of: dissolving 4-5 parts of hydroquinone in 25-30 parts of water by weight, adding 0.2-0.4 part of potassium chloride, stirring uniformly, adding 5-7 parts of furfural to obtain a white viscous solution, placing the white viscous solution in a water bath at the temperature of 55-65 ℃ for reacting for 8-10 hours, and gradually turning the reaction solution into black to generate a hydrogel microsphere solution; and (3) washing the hydrogel microsphere solution with water until the pH value is not changed any more, filtering to remove filtrate, and carbonizing the obtained product at the temperature of 900-1000 ℃ for 3-5h to obtain the carbon aerogel.

8. The indentation-proof asphalt pavement according to claim 1, wherein the preparation method of the modified basalt fiber comprises the following steps: cutting basalt fibers into sections, soaking in a 0.5-2mol/L hydrochloric acid solution for 0.5-1.5h, taking out, drying, then soaking in a 1, 4-butanediol dimethacrylate solution for 0.5-1h, and taking out to obtain the modified basalt fibers; wherein, the 1, 4-butanediol dimethacrylate solution is prepared by mixing 1, 4-butanediol dimethacrylate of every 0.3mol with 1L of 0.5M NaCl solution.

9. The indentation-proof asphalt pavement according to claim 1, wherein the preparation method of the modified epoxy resin comprises the following steps: mixing 2-3 parts of bisphenol A epoxy resin and 1.5-1.9 parts of bismaleimide, stirring for 1-2h at the temperature of 100 ℃ and 120 ℃, then cooling to 40-50 ℃ at the cooling rate of 0.8-1.0 ℃/min, adding 2.2-3.4 parts of methyltetrahydrophthalic anhydride, continuing to stir for 30-40min, then adding 1.4-2.8 parts of methyl isobutyl ketone, 0.8-2.8 parts of diboron trioxide and 2-3 parts of strontium chromate, and continuing to stir for 60-80min to obtain the modified epoxy resin.

10. The method of laying an indentation-proof asphalt pavement according to any one of claims 1 to 9, comprising the steps of: cleaning a pavement base layer, rolling, uniformly mixing raw material components of a first pavement layer, unloading the mixture to the surface of the pavement base layer, and uniformly spreading, compacting and ironing the mixture by using a spreading machine to form the first pavement layer; uniformly mixing the raw material components of the second road surface layer, unloading the mixture to the surface of the first road surface layer, and uniformly spreading, compacting and ironing the mixture by using a spreading machine to form the second road surface layer; then mixing the raw material components of the third path of surface layer, heating to 130-150 ℃, spraying the obtained mixture to the surface of the second path of surface layer, uniformly spreading by a spreading machine, rolling and compacting to form the third path of surface layer; and then reversely driving the paver to carry out repressing until the road surface is smooth and compacted.