Low-carbon high-performance composite pavement material and preparation method thereof

Abstract

The invention relates to a low-carbon high-performance composite pavement material and a preparation method thereof. The low-carbon high-performance composite pavement material comprises a macroporous resin mixture and a resin modified cement-based grouting material, the macroporous resin mixture comprises the following components in parts by mass: 90-100 parts of aggregate, 0-10 parts of mineral powder and 3-5 parts of normal-temperature fast-curing high-elastic epoxy resin, wherein the total mass of the aggregate and the mineral powder is 100 parts; the resin modified cement-based grouting material comprises the following components in parts by mass: 100 parts of cement, 10-20 parts of low-strength high-elasticity waterborne epoxy emulsion, 5-15 parts of sand, 5-15 parts of fly ash, 1-2 parts of a water reducing agent, 4-12 parts of an expanding agent, 7.5-15 parts of rubber powder and 20-40 parts of water. The low-carbon high-performance composite pavement material has the characteristics of normal-temperature construction, low carbon, energy conservation, no joint, no track, high crack resistance, capability of quickly opening traffic and the like, and is suitable for heavy-load roads, intersections, bus stations, highway toll plazas and the like.

Description

Technical Field

[0001] The invention relates to a low-carbon high-performance composite pavement material and a preparation method thereof, belonging to the technical field of low-carbon pavement materials. Background Art

[0002] As the social economy continues to develop, the number of vehicles and the load are increasing, and the road performance such as stability, durability and skid resistance of the road surface will gradually decrease, leading to the occurrence of diseases. Especially in areas where heavy vehicles repeatedly drive, accelerate and brake, such as heavy-loaded roads, intersections, bus stops, and highway toll plazas, rutting, cracks, subsidence, potholes and other road diseases occur more frequently, bringing great pressure to maintenance work.

[0003] When used in the above sections and areas, traditional pavement materials and construction techniques have obvious disadvantages. For example, asphalt pavement has good performance, but due to the visco-plastic characteristics of asphalt mixture, it is easy to produce thermal stability diseases such as rutting, pushing, and congestion, affecting driving safety and comfort; cement concrete pavement has good stiffness and anti-rutting performance, but it is easy to break, pump mud and other diseases under the action of heavy vehicles, which greatly affects the service life of the pavement.

[0004] Semi-flexible pavement is a road material with good rutting resistance. It is mainly composed of a flexible large-void asphalt mixture skeleton and a rigid cement-based grouting material. The strength and stability of the skeleton have an important influence on the overall performance of the semi-flexible pavement material. However, research and engineering practice at home and abroad have shown that conventional semi-flexible pavement materials using asphalt as a skeleton binder have the problem of mismatch between the modulus of the flexible skeleton and the rigid filling material. The modulus of the large-void asphalt mixture skeleton is low, while the modulus of the cement-based grouting material is too high. Especially when the temperature changes, the deformation of the two is not coordinated, which aggravates the stress concentration at the interface between the matrix and the grouting material, so cracking is prone to occur. Therefore, the crack resistance of traditional semi-flexible pavements needs to be enhanced urgently. At the same time, the large-void asphalt mixture skeleton of semi-flexible pavements generally uses high-viscosity modified asphalt. During construction, the material temperature needs to be raised to above 180°C, which not only consumes a lot of energy, but also emits a lot of harmful gases and smoke, polluting the environment. Summary of the invention

[0005] The purpose of the present invention is to solve the problems of insufficient crack resistance, high energy consumption and large pollution of existing semi-flexible pavement materials, and to provide a low-carbon, high-performance composite pavement material and a preparation method thereof. The low-carbon, high-performance composite pavement material has the characteristics of no rutting, strong crack resistance, normal temperature construction, low carbon energy saving, and rapid opening of traffic, and is suitable for heavy-load roads, intersections, bus stops, highway toll plazas, etc.

[0006] In order to achieve the above technical objectives, the present invention will adopt the following technical solutions:

[0007] A low-carbon high-performance composite pavement material, comprising a macroporous resin mixture and a resin-modified cement-based grouting material;

[0008] The macroporous resin mixture comprises the following components in parts by mass: 90-100 parts of aggregate, 0-10 parts of mineral powder, and 3-5 parts of room temperature fast-curing high-elastic epoxy resin;

[0009] The resin modified cement-based grouting material comprises the following components in parts by mass: 100 parts of cement, 10-20 parts of low-strength and high-elastic water-based epoxy emulsion, 5-15 parts of sand, 5-15 parts of fly ash, 1-2 parts of water reducer, 4-12 parts of expansion agent, 7.5-15 parts of rubber powder, and 20-40 parts of water.

[0010] Preferably, the aggregate is one of basalt and limestone, with a particle size ranging from 0.15 to 26.5 mm; the mineral powder is limestone mineral powder, and the content of particles with a particle size less than 0.075 mm is ≥85%.

[0011] Preferably, the room temperature fast curing high elastic epoxy resin is a polymer formed by uniformly mixing a polyurethane modified epoxy resin and a modified amine epoxy curing agent at a mass ratio of 1: (0.8-1.0) at room temperature.

[0012] Preferably, the cement is selected from any one of magnesium phosphate cement, sulphoaluminate cement, silicate cement, ordinary silicate cement and composite silicate cement, preferably magnesium phosphate cement or sulphoaluminate cement, because these two cements have the characteristics of fast drying and early strength, which is conducive to opening traffic as soon as possible after construction.

[0013] Preferably, the low-strength and high-elastic water-based epoxy emulsion is an emulsion formed by uniformly mixing a water-based epoxy resin and a water-based epoxy curing agent at a mass ratio of 1: (0.6-1.0) at room temperature.

[0014] Preferably, the sand is river sand with a fineness modulus of 1.5 to 3.0 and a mud content of ≤2.0%; the fly ash is primary fly ash; the water reducer is a polycarboxylic acid water reducer; the expansion agent is a magnesium oxide expansion agent; and the rubber powder particle size range is ≤0.25 mm.

[0015] Another technical object of the present invention is to provide a pavement construction method of a low-carbon high-performance composite pavement material, comprising the following steps:

[0016] Step 1, preparation of macroporous resin mixture: aggregate and mineral powder are mixed, then room temperature fast curing high elastic epoxy resin is added, stirred evenly, and then spread and rolled to make it flush with the road surface, and the void ratio of the mixture after rolling is controlled to be 22-30%, and cured for 1-5 hours according to the temperature conditions on site; room temperature fast curing high elastic epoxy resin is prepared by the following method: polyurethane modified epoxy resin and modified amine epoxy curing agent are measured, mixed and stirred evenly, and room temperature fast curing high elastic epoxy resin can be obtained for standby use;

[0017] Step 2, preparation of resin-modified cement-based grouting material: cement, low-strength and high-elastic water-based epoxy emulsion, sand, fly ash, water reducer, expansion agent, rubber powder and water are uniformly stirred, and the amount of water is adjusted according to the residence time of the resin-modified cement-based grouting material on the surface of the macroporous resin mixture, until the residence time of the resin-modified cement-based grouting material on the surface of the macroporous resin mixture is 2 to 4 seconds and the grouting material is completely infiltrated;

[0018] Step 3: Pour the prepared resin-modified cement-based grouting material into the macroporous resin mixture until turbid grouting material slurry overflows from the surface;

[0019] Step 4: Clean the remaining slurry on the surface of the macroporous resin mixture, sprinkle a small amount of cement dry powder into the surface gaps, dry the surface moisture, and obtain a low-carbon, high-performance composite pavement after curing.

[0020] Based on the above technical objectives, the present invention has the following advantages over the prior art:

[0021] 1. The low-carbon, high-performance composite pavement material prepared by the present invention is constructed at room temperature throughout the entire process, does not require heating, has a simple process, is easy to construct, and greatly reduces energy consumption and the generation of harmful gases, and has excellent low-carbon and environmental benefits.

[0022] 2. The present invention utilizes the characteristics of high strength, high toughness, strong adhesion, low temperature sensitivity and fast curing speed of high-elastic epoxy resin that cures quickly at room temperature to prepare a large-pore resin mixture with a large porosity but a solid skeleton structure. The strength and stability are much higher than the high-viscosity modified asphalt matrix of traditional semi-flexible pavement materials, which is conducive to the free flow of resin-modified cement-based grouting materials into the matrix and complete filling of the voids, reducing the porosity and internal defects of low-carbon, high-performance composite pavement materials, and improving the overall strength, crack resistance, water stability and fatigue durability.

[0023] 3. Both the macroporous resin mixture and the resin-modified cement-based grouting material contain epoxy groups and active hydrogen functional groups, which can form chemical bonds, resulting in the formation of a cross-linked structure between the epoxy resin molecules, thereby enhancing the adhesion of the interface between the macroporous resin mixture and the resin-modified cement-based grouting material and effectively preventing interface cracking.

[0024] 4. The present invention proposes that resin-modified cement-based grouting material is poured into a macroporous resin mixture, and the resulting low-carbon, high-performance composite pavement material has a three-dimensional "interpenetrating network" structure, and both phases are thermosetting materials. Therefore, the composite material is a pavement material with excellent anti-rutting performance.

[0025] 5. On the one hand, the present invention utilizes room temperature fast-curing high-elastic epoxy resin to increase the modulus of the macroporous resin mixture, and on the other hand, reduces the modulus of the cement-based grouting material and improves its toughness by adding a relatively flexible low-strength high-elastic water-based epoxy emulsion and rubber powder, so that the modulus between the macroporous resin mixture and the resin-modified cement-based grouting material "increases and decreases", and the gap is greatly narrowed, which effectively coordinates the synergistic deformation of the matrix-grouting material. At the same time, the expansion agent is added to reduce the shrinkage cracking of the resin-modified cement-based grouting material. These measures significantly improve the crack resistance of low-carbon, high-performance composite pavement materials.

[0026] 6. The curing time of the low-carbon, high-performance composite pavement material prepared by the present invention depends on the environmental climate, and the comprehensive curing time is ≤5h. Compared with traditional technologies, it can greatly reduce the time of closed traffic. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a cross-sectional view of the low-carbon high-performance composite pavement material of the present invention;

[0028] In the figure: 1. aggregate; 2. resin; 3. voids; 4. grouting material. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means any limitation to the present invention and its application or use. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Unless otherwise specified, the relative arrangement, expressions and numerical values ​​of the components and steps described in these embodiments do not limit the scope of the present invention. The techniques, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but in appropriate cases, the techniques, methods and equipment should be regarded as part of the specification. In all the examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values.

[0030] The technical solution of the present invention will be described in detail below in conjunction with several embodiments.

[0031] For the convenience of description, the sources of some raw materials used in the examples are described below:

[0032] The polyurethane modified epoxy resin is CSA-A type from Nanjing Lude Jinyou New Material Technology Co., Ltd.

[0033] The modified amine epoxy curing agent is CSA-B type from Nanjing Luther Jinyou New Material Technology Co., Ltd.

[0034] The water-based epoxy resin is REA-A type produced by Nanjing Dingrui New Materials Technology Co., Ltd.

[0035] The water-based epoxy curing agent is REA-B type from Nanjing Dingrui New Materials Technology Co., Ltd.

[0036] The polycarboxylate water reducer is PCA-V type produced by Jiangsu Subote New Materials Co., Ltd.

[0037] The magnesium oxide expansion agent is HME-I type produced by Jiangsu Subote New Materials Co., Ltd.

[0038] Example 1

[0039] Preparation of macroporous resin mixture: first, mix the polyurethane modified epoxy resin and the modified amine epoxy curing agent in a mass ratio of 1:0.8 and stir evenly to obtain a room temperature fast-curing high-elastic epoxy resin for stand-alone use. After curing, the room temperature fast-curing high-elastic epoxy resin has a tensile strength of ≥2.0MPa at 23°C, an elongation at break ≥100%, and a curing time ≤5h; then, 90 parts of basalt aggregate, 10 parts of mineral powder and 5 parts of room temperature fast-curing high-elastic epoxy resin are mixed and stirred evenly, and the mixed mixture is spread with a spreading thickness of 6cm. The void ratio after rolling is controlled to be 22%, and the macroporous resin mixture is obtained after curing at room temperature.

[0040] Preparation of resin-modified cement-based grouting material: First, water-based epoxy resin and water-based epoxy curing agent are mixed at a mass ratio of 1:0.6, and stirred continuously until uniform, and low-strength and high-elastic water-based epoxy emulsion is obtained for standby use. After the low-strength and high-elastic water-based epoxy emulsion is cured, the tensile strength at 23°C is ≤2.0MPa, and the elongation at break is ≥200%; then 100 parts of 52.5 grade sulphoaluminate cement, 10 parts of low-strength and high-elastic water-based epoxy emulsion, 5 parts of river sand, 5 parts of fly ash, 1.5 parts of polycarboxylic acid water reducer, 4 parts of magnesium oxide expansion agent, 7.5 parts of rubber powder and 50 parts of water are mixed and stirred uniformly to obtain resin-modified cement-based grouting material. The fineness modulus of river sand is 1.5-3.0, and the mud content is ≤2.0%. The fly ash is first-grade fly ash, and the particle size range of rubber powder is ≤0.25mm.

[0041] Preparation of low-carbon, high-performance composite pavement: Pour the prepared resin-modified cement-based grouting material into the macroporous resin mixture. When the grouting is full, clean the remaining grout on the surface and open it to traffic after curing for 4 hours.

[0042] Example 2

[0043] Preparation of macroporous resin mixture: first, mix the polyurethane modified epoxy resin and the modified amine epoxy curing agent in a mass ratio of 1:1 and stir evenly to obtain a room temperature fast-curing high-elastic epoxy resin for stand-alone use; then, mix 100 parts of basalt aggregate, 0 parts of mineral powder and 3 parts of room temperature fast-curing high-elastic epoxy resin and stir evenly, spread the mixed mixture with a spreading thickness of 12 cm, control the void ratio after rolling to 30%, and obtain a macroporous resin mixture after curing at room temperature.

[0044] Preparation of resin-modified cement-based grouting material: first, mix the water-based epoxy resin and the water-based epoxy curing agent in a mass ratio of 1:1, and continue stirring until uniform to obtain a low-strength and high-elastic water-based epoxy emulsion for stand-alone use; then mix 100 parts of 42.5 grade magnesium phosphate cement, 20 parts of low-strength and high-elastic water-based epoxy emulsion, 15 parts of river sand, 15 parts of fly ash, 1 part of polycarboxylic acid water reducer, 12 parts of magnesium oxide expansion agent, 15 parts of rubber powder and 30 parts of water, and stir evenly to obtain the resin-modified cement-based grouting material.

[0045] Preparation of low-carbon, high-performance composite pavement: Pour the prepared resin-modified cement-based grouting material into the macroporous resin mixture. When the grouting is full, clean the remaining grout on the surface and open it to traffic after curing for 2 hours.

[0046] Example 3

[0047] Preparation of macroporous resin mixture: first, mix the polyurethane modified epoxy resin and the modified amine epoxy curing agent in a mass ratio of 1:0.9 and stir evenly to obtain a room temperature fast-curing high-elastic epoxy resin for stand-alone use; then, mix 95 parts of basalt aggregate, 5 parts of mineral powder and 4 parts of room temperature fast-curing high-elastic epoxy resin and stir evenly, spread the mixed mixture with a spreading thickness of 8 cm, control the void ratio after rolling to 25%, and obtain a macroporous resin mixture after curing at room temperature.

[0048] Preparation of resin-modified cement-based grouting material: first, mix the water-based epoxy resin and the water-based epoxy curing agent in a mass ratio of 1:0.7, and continue stirring until uniform to obtain a low-strength and high-elastic water-based epoxy emulsion for stand-alone use; then mix 100 parts of 42.5 grade sulphoaluminate cement, 15 parts of low-strength and high-elastic water-based epoxy emulsion, 8 parts of river sand, 10 parts of fly ash, 2 parts of polycarboxylic acid water reducer, 8 parts of magnesium oxide expansion agent, 9 parts of rubber powder and 40 parts of water, and stir evenly to obtain the resin-modified cement-based grouting material.

[0049] Preparation of low-carbon, high-performance composite pavement: Pour the prepared resin-modified cement-based grouting material into the macroporous resin mixture. When the grouting is full, clean the remaining grout on the surface and open it to traffic after curing for 4 hours.

[0050] Example 4

[0051] Preparation of macroporous resin mixture: first, mix the polyurethane modified epoxy resin and the modified amine epoxy curing agent in a mass ratio of 1:0.95 and stir evenly to obtain a room temperature fast-curing high-elastic epoxy resin for stand-alone use; then, mix 92 parts of basalt aggregate, 8 parts of mineral powder and 4.5 parts of room temperature fast-curing high-elastic epoxy resin and stir evenly, spread the mixed mixture with a spreading thickness of 7 cm, control the void ratio after rolling to 24%, and obtain a macroporous resin mixture after curing at room temperature.

[0052] Preparation of resin-modified cement-based grouting material: first, mix the water-based epoxy resin and the water-based epoxy curing agent in a mass ratio of 1:0.9, and continue stirring until uniform to obtain a low-strength and high-elastic water-based epoxy emulsion for stand-alone use; then mix 100 parts of 52.5 grade magnesium phosphate cement, 13 parts of low-strength and high-elastic water-based epoxy emulsion, 12 parts of river sand, 12 parts of fly ash, 1.8 parts of polycarboxylic acid water reducer, 6 parts of magnesium oxide expansion agent, 13.5 parts of rubber powder and 46 parts of water, and stir evenly to obtain resin-modified cement-based grouting material.

[0053] Preparation of low-carbon, high-performance composite pavement: Pour the prepared resin-modified cement-based grouting material into the macroporous resin mixture. When the grouting is full, clean the remaining grout on the surface and open it to traffic after curing for 2 hours.

[0054] Example 5

[0055] Preparation of macroporous resin mixture: first, mix the polyurethane modified epoxy resin and the modified amine epoxy curing agent in a mass ratio of 1:0.8 and stir evenly to obtain a room temperature fast-curing high-elastic epoxy resin for stand-alone use; then, mix 98 parts of basalt aggregate, 2 parts of mineral powder and 3.5 parts of room temperature fast-curing high-elastic epoxy resin and stir evenly, spread the mixed mixture with a spreading thickness of 10 cm, control the void ratio after rolling to 28%, and obtain a macroporous resin mixture after curing at room temperature.

[0056] Preparation of resin-modified cement-based grouting material: first, mix the water-based epoxy resin and the water-based epoxy curing agent in a mass ratio of 1:0.8, and continue stirring until uniform to obtain a low-strength and high-elastic water-based epoxy emulsion for stand-alone use; then mix 100 parts of 42.5 grade sulphoaluminate cement, 18 parts of low-strength and high-elastic water-based epoxy emulsion, 10 parts of river sand, 8 parts of fly ash, 1.2 parts of polycarboxylic acid water reducer, 10 parts of magnesium oxide expansion agent, 10.5 parts of rubber powder and 35 parts of water, and stir evenly to obtain the resin-modified cement-based grouting material.

[0057] Preparation of low-carbon, high-performance composite pavement: Pour the prepared resin-modified cement-based grouting material into the macroporous resin mixture. When the grouting is full, clean the remaining grout on the surface and open it to traffic after curing for 3 hours.

[0058] In the above embodiment, in the macroporous resin mixture, the basalt aggregate used can be replaced by limestone aggregate with a particle size range of 0.15 to 26.5 mm. The mineral powder used is limestone powder, and the content of particles with a particle size less than 0.075 mm is ≥ 85%.

[0059] The present invention has been described in detail above in conjunction with the embodiments. However, those skilled in the art will appreciate that, without departing from the spirit of the present invention, the specific parameters in the above embodiments may be changed to form a plurality of specific embodiments, which are all within the common variation range of the present invention and will not be described in detail herein.

[0060] Performance Testing

[0061] According to the specification "Test Procedure for Asphalt and Asphalt Mixtures for Highway Engineering (JTG E20-2011)" and related test methods, the performance of the low-carbon high-performance composite pavement materials prepared in Examples 1-5 was tested, and compared with the semi-flexible pavement material of the traditional hot mix asphalt large void matrix composite cement grouting material (Comparative Example 1). The test results are shown in the following table:

[0062] Table 1 Performance test results of low-carbon high-performance composite pavement materials

[0063]

[0064]

[0065] In the above table, Marshall stability is used to characterize the strength of the material. The larger the Marshall stability, the higher the material strength; dynamic modulus is used to characterize the dynamic response of the material under vehicle load. The larger the value, the stronger the material's ability to resist dynamic deformation; dynamic stability is used to characterize the high-temperature stability of the material. The larger the dynamic stability, the better the anti-rutting performance; fracture energy is used to characterize the material's ability to resist fracture. The larger the value, the better the material's anti-cracking performance.

[0066] From the test results in the above table, it can be seen that the strength of the macroporous resin mixture matrix prepared by the present invention is much higher than that of the traditional semi-flexible pavement material, and its Marshall stability is improved by 2.5 to 5.6 times; the average difference in dynamic modulus between the macroporous resin mixture matrix and the resin-modified cement-based grouting material is 9080MPa, which is about 30% of the traditional semi-flexible pavement material; in terms of high-temperature rutting resistance, the average dynamic stability of the low-carbon, high-performance composite pavement material prepared by the present invention is 31060, which is about 1 times higher than that of the traditional semi-flexible pavement material; in terms of low-temperature crack resistance, the average maximum bending strain of the low-carbon, high-performance composite pavement material prepared by the present invention is 2839με, which is about 36% higher than that of the traditional semi-flexible pavement material; in terms of normal temperature crack resistance, the average fracture energy of the low-carbon, high-performance composite pavement material prepared by the present invention is 5045J / m 2 , which is about 2.78 times that of traditional semi-flexible pavement materials.

[0067] In summary, the low-carbon, high-performance composite pavement material prepared by the present invention is a low-carbon, energy-saving, green and environmentally friendly road construction material, and its high-temperature rutting resistance, low-temperature crack resistance and room-temperature fracture resistance are all very excellent, and its strength is formed quickly, and it can be quickly opened to traffic, and has good application value.

Claims

1. A low-carbon, high-performance composite pavement material, characterized in that: Including macroporous resin mixture and resin modified cement-based grouting material; The macroporous resin mixture comprises the following components in parts by mass: 90-100 parts of aggregate, 0-10 parts of mineral powder, and 3-5 parts of room temperature fast-curing high-elastic epoxy resin; The resin modified cement-based grouting material comprises the following components in parts by mass: 100 parts of cement, 10-20 parts of low-strength and high-elastic water-based epoxy emulsion, 5-15 parts of sand, 5-15 parts of fly ash, 1-2 parts of water reducer, 4-12 parts of expansion agent, 7.5-15 parts of rubber powder, and 20-40 parts of water.

2. The low-carbon high-performance composite pavement material according to claim 1, characterized in that: The aggregate is one of basalt and limestone, with a particle size ranging from 0.15 to 26.5 mm; the mineral powder is limestone mineral powder, and the content of particles with a particle size less than 0.075 mm is ≥85%.

3. The low-carbon high-performance composite pavement material according to claim 1, characterized in that: The room temperature fast-curing high-elastic epoxy resin is a polymer formed by uniformly mixing polyurethane modified epoxy resin and modified amine epoxy curing agent at a mass ratio of 1: (0.8-1.0) at room temperature.

4. The low-carbon high-performance composite pavement material according to claim 1, characterized in that: The cement is selected from any one of magnesium phosphate cement, sulphoaluminate cement, silicate cement, ordinary silicate cement and composite silicate cement.

5. The low-carbon high-performance composite pavement material according to claim 1, characterized in that: The low-strength and high-elastic water-based epoxy emulsion is an emulsion formed by uniformly mixing a water-based epoxy resin and a water-based epoxy curing agent at a mass ratio of 1: (0.6-1.0) at room temperature.

6. The low-carbon high-performance composite pavement material according to claim 1, characterized in that: The sand is river sand with a fineness modulus of 1.5 to 3.0 and a mud content of ≤2.0%.

7. The low-carbon high-performance composite pavement material according to claim 1, characterized in that: The fly ash is first-grade fly ash, the water reducer is a polycarboxylic acid water reducer, the expansion agent is a magnesium oxide expansion agent, and the rubber powder particle size range is ≤0.25 mm.

8. A construction method for a low-carbon, high-performance composite pavement material, characterized in that: The steps include: Step 1, preparation of macroporous resin mixture: mix aggregate and mineral powder, then add room temperature fast curing high elastic epoxy resin, stir evenly, then spread and roll it to make it flush with the road surface, control the void ratio of the mixture after rolling to 22-30%, and cure for 1-5 hours according to the temperature conditions on site; room temperature fast curing high elastic epoxy resin is prepared by the following method: polyurethane modified epoxy resin and modified amine epoxy curing agent are measured, mixed and stirred evenly to obtain room temperature fast curing high elastic epoxy resin for standby use; Step 2, preparation of resin-modified cement-based grouting material: cement, low-strength and high-elastic water-based epoxy emulsion, sand, fly ash, water reducer, expansion agent, rubber powder and water are uniformly stirred, and the amount of water is adjusted according to the residence time of the resin-modified cement-based grouting material on the surface of the macroporous resin mixture, until the residence time of the resin-modified cement-based grouting material on the surface of the macroporous resin mixture is 2 to 4 seconds and the grouting material is completely infiltrated; Step 3: Pour the prepared resin-modified cement-based grouting material into the macroporous resin mixture until turbid grouting material slurry overflows from the surface; Step 4: Clean the remaining slurry on the surface of the macroporous resin mixture, sprinkle a small amount of cement dry powder into the surface gaps, dry the surface moisture, and obtain a low-carbon, high-performance composite pavement after curing.

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