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

Abstract

The present application relates to a kind of low-carbon high-performance composite pavement material and its preparation method.Low-carbon high-performance composite pavement material includes macroporous resin mixture and resin modified cement-based grout;Macroporous resin mixture includes: with the total mass of aggregate and mineral powder 100 parts, aggregate 90-100 parts, mineral powder 0-10 parts, normal temperature fast solid high-elasticity epoxy resin 3-5 parts;Resin modified cement-based grout includes the following mass fraction components: cement 100 parts, low-strength high-elasticity waterborne epoxy emulsion 10-20 parts, sand 5-15 parts, fly ash 5-15 parts, water reducing agent 1-2 parts, expanding agent 4-12 parts, rubber powder 7.5-15 parts, water 20-40 parts.The low-carbon high-performance composite pavement material has normal temperature construction, low-carbon energy saving, no joint, no rut, strong crack resistance, can quickly open traffic and other characteristics, is suitable for heavy load road, intersection, bus station, highway toll plaza etc.

Description

Technical Field

[0001] The present 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 socioeconomic development continues, the number of vehicles and loads continue to increase, leading to a gradual decline in road pavement stability, durability, and skid resistance, leading to the development of road conditions. Especially in areas where heavy vehicles repeatedly drive, accelerate, and brake, such as heavily loaded roads, intersections, bus stops, and highway toll plazas, road surface conditions such as rutting, cracks, subsidence, and potholes are more frequent, placing significant pressure on maintenance efforts.

[0003] Traditional pavement materials and construction techniques have significant drawbacks when used in these sections and areas. For example, while asphalt pavement offers excellent performance, the viscoplastic nature of the asphalt mixture makes it susceptible to thermal stability defects such as rutting, pushing, and packing, impacting driving safety and comfort. Cement concrete pavement offers excellent stiffness and rutting resistance, but is susceptible to cracking and mud pumping under heavy vehicle loads, significantly impacting its service life.

[0004] Semi-flexible pavement is a road material with excellent rutting resistance. It is primarily composed of a flexible, large-void asphalt mixture skeleton and a rigid, cement-based grouting material. The strength and stability of the skeleton significantly influence the overall performance of the semi-flexible pavement material. However, research and engineering practice both domestically and internationally have shown that conventional semi-flexible pavement materials using asphalt as the skeleton binder suffer from a modulus mismatch between the flexible skeleton and the rigid filler. The large-void asphalt mixture skeleton has a low modulus, while the cement-based grouting material has a high modulus. This mismatch in deformation, particularly during temperature fluctuations, exacerbates stress concentration at the interface between the matrix and grouting material, leading to cracking. Therefore, the crack resistance of conventional semi-flexible pavements urgently needs to be enhanced. Furthermore, the large-void asphalt mixture skeletons of semi-flexible pavements generally use highly viscous modified asphalt, requiring the material temperature to rise above 180°C during construction. This not only consumes significant energy but also emits significant amounts of harmful gases and dust, polluting the environment. Summary of the Invention

[0005] The present invention aims to address the problems of existing semi-flexible pavement materials, such as insufficient crack resistance, high energy consumption, and significant pollution, by providing a low-carbon, high-performance composite pavement material and its preparation method. This low-carbon, high-performance composite pavement material offers advantages such as rutting resistance, strong crack resistance, room-temperature construction, low carbon footprint, energy conservation, and rapid traffic release. It is suitable for use on heavily loaded roads, intersections, bus stops, and highway toll plazas.

[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 includes the following components in parts by mass: 100 parts of cement, 10-20 parts of low-strength and high-elasticity 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, with a content of particles with a particle size less than 0.075 mm being ≥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-elasticity 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 first-grade fly ash; the water reducer is a polycarboxylate 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 a macroporous resin mixture: Aggregate and mineral powder are mixed, and 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. The void ratio of the rolled mixture is controlled to be 22-30%, and the mixture is cured for 1-5 hours according to the on-site temperature conditions. The 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;

[0017] Step 2, preparation of resin-modified cement-based grouting material: cement, low-strength and high-elasticity water-based epoxy emulsion, sand, fly ash, water reducer, expansion agent, rubber powder and water are mixed evenly, 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 resin-modified cement-based grouting material has completely penetrated into the surface of the macroporous resin mixture after the residence time on the surface of the macroporous resin mixture is 2 to 4 seconds;

[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 residual slurry on the surface of the large-pore resin mixture, sprinkle a small amount of cement powder into the surface gaps, dry the surface moisture, and after curing, you will get a low-carbon, high-performance composite pavement.

[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, thereby having 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 at room temperature to prepare a large-pore resin mixture with a large porosity but a strong 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 completely filling 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 cross-linked structures between epoxy resin molecules, 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 to obtain a low-carbon, high-performance composite pavement material with 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. On the other hand, by adding relatively flexible low-strength high-elastic water-based epoxy emulsion and rubber powder, the modulus of the cement-based grouting material is reduced and the toughness is improved, 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 and the grouting material. At the same time, the addition of an expansion agent reduces 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. The comprehensive curing time is ≤5h, which can greatly reduce the time of closed traffic compared with traditional technologies. 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. Void; 4. Grouting material. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection of the present invention. Unless otherwise specified, the relative arrangement of components and steps, expressions and numerical values ​​described in these embodiments do not limit the scope of the present invention. Technologies, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the technologies, methods and equipment should be considered part of the specification. In all examples shown and discussed here, any specific values ​​should be interpreted as merely exemplary and not as limitations. 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 with reference to several embodiments.

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

[0032] The polyurethane modified epoxy resin was 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 Lude Jinyou New Material Technology Co., Ltd.

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

[0035] The water-based epoxy curing agent is REA-B type from Nanjing Dingrui New Material 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, polyurethane modified epoxy resin and modified amine epoxy curing agent are mixed in a mass ratio of 1:0.8 and stirred evenly to obtain room temperature fast curing high elastic epoxy resin for standby 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 the resin-modified cement-based grouting material: First, mix a water-based epoxy resin and a water-based epoxy curing agent in a mass ratio of 1:0.6 and stir continuously until uniform. This produces a low-strength, high-elasticity water-based epoxy emulsion for use. After curing, the low-strength, high-elasticity water-based epoxy emulsion has a tensile strength of ≤2.0 MPa at 23°C and an elongation at break of ≥200%. Next, mix 100 parts of 52.5-grade sulphoaluminate cement, 10 parts of the low-strength, high-elasticity water-based epoxy emulsion, 5 parts of river sand, 5 parts of fly ash, 1.5 parts of a polycarboxylate superplasticizer, 4 parts of a magnesium oxide expansive agent, 7.5 parts of rubber powder, and 50 parts of water and stir until uniform. This produces the resin-modified cement-based grouting material. The river sand has a fineness modulus of 1.5-3.0 and a mud content of ≤2.0%. The fly ash is Grade 1, and the rubber powder has a particle size of ≤0.25 mm.

[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 slurry on the surface and open it to traffic after curing for 4 hours.

[0042] Example 2

[0043] Preparation of macroporous resin mixture: First, polyurethane modified epoxy resin and modified amine epoxy curing agent are mixed in a mass ratio of 1:1 and stirred evenly to obtain room temperature fast-curing high-elastic epoxy resin for standby use; then 100 parts of basalt aggregate, 0 parts of mineral powder and 3 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 12 cm. The void ratio after rolling is controlled to 30%, and the macroporous resin mixture is obtained 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 slurry on the surface and open it to traffic after curing for 2 hours.

[0046] Example 3

[0047] Preparation of macroporous resin mixture: First, polyurethane modified epoxy resin and modified amine epoxy curing agent are mixed in a mass ratio of 1:0.9 and stirred evenly to obtain room temperature fast-curing high-elastic epoxy resin for standby use; then 95 parts of basalt aggregate, 5 parts of mineral powder and 4 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 8 cm. The void ratio after rolling is controlled to 25%, and the macroporous resin mixture is obtained after curing at room temperature.

[0048] Preparation of resin-modified cement-based grouting material: first, mix water-based epoxy resin and 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 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 slurry on the surface and open it to traffic after curing for 4 hours.

[0050] Example 4

[0051] Preparation of macroporous resin mixture: First, polyurethane modified epoxy resin and modified amine epoxy curing agent are mixed in a mass ratio of 1:0.95 and stirred evenly to obtain room temperature fast curing high elastic epoxy resin for standby use; then 92 parts of basalt aggregate, 8 parts of mineral powder and 4.5 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 7 cm. The void ratio after rolling is controlled to 24%, and the macroporous resin mixture is obtained after curing at room temperature.

[0052] Preparation of resin-modified cement-based grouting material: first, mix water-based epoxy resin and 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 slurry on the surface and open it to traffic after curing for 2 hours.

[0054] Example 5

[0055] Preparation of macroporous resin mixture: First, polyurethane modified epoxy resin and modified amine epoxy curing agent are mixed in a mass ratio of 1:0.8 and stirred evenly to obtain room temperature fast-curing high-elastic epoxy resin for standby use; then 98 parts of basalt aggregate, 2 parts of mineral powder and 3.5 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 10 cm. The void ratio after rolling is controlled to 28%, and the macroporous resin mixture is obtained after curing at room temperature.

[0056] Preparation of resin-modified cement-based grouting material: first, mix water-based epoxy resin and 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 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 slurry 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 with limestone aggregate with a particle size range of 0.15 to 26.5 mm. The mineral powder used is limestone powder, with a particle size of less than 0.075 mm containing ≥85%.

[0059] The present invention has been described in detail above with reference to 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 modified to form multiple specific embodiments, which are all within the common variation range of the present invention and will not be described in detail here.

[0060] Performance Testing

[0061] According to the "Test Procedures 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 a semi-flexible pavement material (Comparative Example 1) of a conventional hot-mix asphalt large-void matrix composite cement grouting material. 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 greater 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 greater the dynamic stability, the better the rutting resistance. Fracture energy is used to characterize the material's ability to resist fracture. The larger the value, the better the material's crack resistance.

[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 traditional semi-flexible pavement materials, and its Marshall stability is increased 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 9080 MPa, 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 traditional semi-flexible pavement materials; 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 2839 με, which is about 36% higher than that of traditional semi-flexible pavement materials; in terms of room temperature crack resistance, the average fracture energy of the low-carbon, high-performance composite pavement material prepared by the present invention is 5045 J / 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. 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 room-temperature fast-curing high-elastic epoxy resin has a tensile strength of ≥2.0 MPa at 23° C. after curing, an elongation at break ≥100%, and a curing time ≤5 hours. The polymer is formed by uniformly mixing a polyurethane-modified epoxy resin and a modified amine epoxy curing agent at a mass ratio of 1:0.8 at room temperature; The resin-modified cement-based grouting material includes the following components in parts by mass: 100 parts of cement, 10-20 parts of low-strength and high-elasticity 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; the low-strength and high-elasticity water-based epoxy emulsion is an emulsion formed by uniformly mixing water-based epoxy resin and water-based epoxy curing agent at a mass ratio of 1: (0.6-1.0) at room temperature.

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 range of 0.15 to 26.5 mm; the mineral powder is limestone mineral powder, with a content of particles with a particle size less than 0.075 mm of ≥85%.

3. 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.

4. 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%.

5. 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.

6. A construction method of the low-carbon, high-performance composite pavement material according to claim 1, characterized in that: The steps include: Step 1: Prepare a macroporous resin mixture: Mix the aggregate and mineral powder, then add a room-temperature fast-curing, high-elastic epoxy resin, stir evenly, and then spread and roll it flush with the road surface. Control the void ratio of the rolled mixture to 22-30%, and cure it for 1-5 hours depending on the site temperature. Prepare the room-temperature fast-curing, high-elastic epoxy resin by the following method: Measure, mix, and evenly stir a polyurethane-modified epoxy resin and a modified amine epoxy curing agent to obtain a room-temperature fast-curing, high-elastic epoxy resin for use. Step 2, preparation of resin-modified cement-based grouting material: cement, low-strength and high-elasticity water-based epoxy emulsion, sand, fly ash, water reducer, expansion agent, rubber powder and water are mixed evenly, 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 resin-modified cement-based grouting material has completely penetrated into the surface of the macroporous resin mixture after the residence time on the surface of the macroporous resin mixture is 2 to 4 seconds; 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 residual slurry on the surface of the macroporous resin mixture, sprinkle a small amount of cement powder into the surface gaps, dry the surface moisture, and after curing, you will get a low-carbon, high-performance composite pavement.

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