Construction method for hot in-place recycling of rubber asphalt pavement

Abstract

The invention discloses a hot in-place recycling construction method for a rubber asphalt pavement. The method comprises the following steps: firstly spreading a preimpregnation agent, then carrying out heating-raking-stirring treatment to obtain a pavement milling old material, adding a second component and a first component of the rubber asphalt regenerant into the old material, then mixing with a new aggregate formed by mixing the second component and a third component of the rubber asphalt regenerant, adding a fourth component, and uniformly mixing to obtain the pavement milling old material. After uniform mixing, hot in-place recycling paving and rolling construction is carried out; and finally, uniformly spreading a vulcanization sealing layer, heating the pavement, and naturally cooling the pavement to finish in-situ thermal regeneration construction. The construction method disclosed by the invention solves the problems of high mixture viscosity, difficulty in raking, turning and stirring, difficulty in recovery of viscoelastic characteristics of an aged cementing material, poor skid resistance of the regenerated pavement and easiness in water damage of the hot in-place recycling rubber asphalt pavement, and realizes hot in-place recycling of the rubber asphalt pavement with excellent performance.

Description

Technical Field

[0001] The present invention belongs to the technical field of hot recycling of asphalt pavement, and particularly relates to a construction method for in-situ hot recycling of rubber asphalt pavement. Background Art

[0002] In-situ hot recycling technology is an efficient and highly integrated highway maintenance method. It uses professional equipment to heat and rake the old pavement, directly recycle the old asphalt mixture on-site, add an appropriate amount of regenerant, and supplement fresh asphalt mixture composed of asphalt and aggregates if necessary. After processes such as mixing, paving, and compaction, pavement regeneration is achieved. This technology not only solves the problem of waste disposal of old asphalt pavement but also significantly reduces the consumption of raw materials such as asphalt and stone, and lowers the maintenance cost. As an innovative method in the field of highway maintenance, in-situ hot recycling technology brings new development opportunities to the highway maintenance industry with its advantages of high efficiency, environmental protection, and resource conservation.

[0003] With the increase of service life, the pavements paved with rubber asphalt mixture in the early stage of our country have suffered from diseases such as cracks, potholes, looseness, and ruts, and have successively entered the peak period of maintenance. At present, when the high-value recycling of pavement materials has become a trend, the on-site recycling of rubber asphalt pavement is extremely urgent. There are the following technical difficulties in the application of in-situ hot recycling of rubber asphalt pavement: (1) The viscosity of rubber asphalt mixture is high. In the in-situ hot recycling equipment, there is a problem of insufficient temperature rise during the heating process of the heating unit for the pavement, which affects the raking of the pavement and the difficulty of homogenizing and mixing the old materials, and there is also a balance problem that too high a temperature rise causes excessive aging of the rubber asphalt pavement.

[0004] (2) The aging process of waste rubber powder modified asphalt not only involves the aging of asphalt itself but also is accompanied by characteristics such as the depolymerization of rubber powder particles and the decay of viscoelastic properties, resulting in the destruction of the phase equilibrium of the original system and the failure of the modified function of waste rubber powder. Existing regenerants cannot restore the viscoelastic properties of waste rubber powder modified asphalt in the aged rubber asphalt pavement.

[0005] (3) In the in-situ hot recycling construction, the content of old materials is usually above 85%. However, the water sensitivity of waste mixture is generally relatively high and the angularity is poor. Therefore, the regenerated pavement has the disadvantages of poor skid resistance and easy water damage. Thus, improving skid resistance and reducing water damage is a technical problem that needs to be considered for in-situ hot recycling of rubber asphalt pavement. Summary of the Invention

[0006] To solve the above technical problems, the present invention provides a construction method for in-situ hot recycling applicable to rubber asphalt pavement and the regenerated materials used in combination.

[0007] The construction method for in-situ hot recycling of rubber asphalt pavement is as follows: Step 1: First, clean the pavement to be recycled. Then, evenly sprinkle the pre - impregnating agent on the pavement surface in steps and allow it to fully penetrate and dissolve. The spreading amount of the pre - impregnating agent is not less than 300 g / m 2 ; Step 2: Heat the pavement to be recycled to 160 - 195 °C, then loosen and mix it to obtain the milled old pavement materials. Add the second component of the rubber asphalt rejuvenator to it, mix evenly, and then add the first component of the rubber asphalt rejuvenator and stir until evenly dispersed. The addition amount of the second component is 0.1 - 5% of the mass of the milled old pavement materials, and the addition amount of the first component is 1 - 20% of the mass of the asphalt in the milled old pavement materials; Step 3: Add the fourth component of the rubber asphalt rejuvenator to the mixture in Step 2, mix evenly, and then carry out in - place hot recycling paving and rolling construction. The addition amount of the fourth component is 0.2 - 2% of the mass of the asphalt in the milled old pavement materials; Step 4: Finally, evenly sprinkle the sulfurized seal coat with a spreading amount of 3 - 9 kg / m 2 , heat the pavement at no less than 110 °C for 10 - 60 min, and wait for the pavement to cool naturally to complete the in - place hot recycling construction.

[0008] In Step 2, new aggregates heated to 165 - 200 °C and mixed with the second and third components of the rubber asphalt rejuvenator are also added. The addition amount of the second component is 0.1 - 5% of the mass of the new aggregates, and the addition amount of the third component is 3 - 7% of the mass of the new aggregates. At this time, the addition amount of the fourth component in Step 3 is 0.2 - 2% of the sum of the mass of the asphalt in the milled old pavement materials and the mass of the third component.

[0009] The pre - impregnating agent is composed of 80 - 98 parts by mass of low - solid - content emulsified asphalt and / or low - solid - content modified emulsified asphalt, 1 - 10 parts by mass of naphtha, and 1 - 10 parts by mass of D - limonene.

[0010] The first component is composed of a mixture of 50 - 80 parts by mass of a component conditioner, 5 - 25 parts by mass of light oil, 0.5 - 10 parts by mass of a peptizer, and 1 - 10 parts by mass of a repair agent.

[0011] The component conditioner is one or more of furfural extract oil, rubber oil, lubricating oil base oil, FCC slurry, aromatic oil, waste engine oil, vegetable oil, and gutter oil.

[0012] The light oil is one or more of epoxy soybean oil, castor oil, tung oil, palm oil, and rapeseed oil.

[0013] The peptizer is one or more of peptizer A86, peptizer CPA, peptizer HTA, peptizer DBD, zinc isooctanoate, and PCTP.

[0014] The repair agent is one or more of BDDE, HDI, MDI, EPR, PAPI, and trimethylolpropane triglycidyl ether.

[0015] The second component is a dry-process SBS modifier.

[0016] The preparation method of the third component is as follows: Heat 100 parts by mass of petroleum asphalt to 160 - 190 °C, then add 1 - 18 parts by mass of rubber powder and stir for 30 - 80 min, then add 1 - 3 parts by mass of a warm mix additive and continue stirring for 15 - 30 min, and finally add 0.2 - 3 parts by mass of an anti-aging agent and stir for 15 - 30 min to obtain the third component.

[0017] The warm mix additive is one or more of PE wax, F-T wax, oxidized PE wax, and microcrystalline wax.

[0018] The anti-aging agent is one or more of anti-aging agent TMPPD, anti-aging agent ODA, anti-aging agent KY-405, anti-aging agent 616 (L), anti-aging agent 264, anti-aging agent 616, and anti-aging agent NDBC.

[0019] The fourth component is composed of 1 - 8 parts by mass of a vulcanizing agent, 1 - 4 parts by mass of a vulcanization accelerator, and 1 - 4 parts by mass of a vulcanization balance agent.

[0020] The vulcanizing agent is one or more of a mixture of p-tert-butylphenol disulfide and stearic acid, brominated p-tert-octylphenol formaldehyde resin, p-tert-octylphenol formaldehyde resin, p-tert-butylphenol formaldehyde resin, di-tert-butyl peroxide, dicumyl peroxide, tert-butyl peroxybenzoate, p-benzoquinone dioxime, N,N'-m-phenylene bismaleimide, N,N'-4,4'-diphenylmethane bismaleimide, 1,1'-dithiobis(hexanecarboximide), and hexasulfide bis(pentamethylene thiuram).

[0021] The accelerator is one or more of accelerator ZMBT, accelerator 64#, accelerator TBzTD, accelerator TIBTD, accelerator TeDEC, accelerator SbDEC, accelerator ZDIBC, accelerator TMTM, accelerator TETD, accelerator DBTU, and diisopropyl xanthogen tetrasulfide.

[0022] The vulcanization balance agent is one or more of Si-17, coupling agent Si69-50, 1,3-bis(2-furylmethylenimide methyl)benzene, and disodium hexamethylenedithiocarbamate dihydrate.

[0023] The vulcanized seal coat consists of 0.1 - 2 parts by mass of a vulcanizing agent, 0.1 - 2 parts by mass of a vulcanization accelerator, 100 - 500 parts by mass of an infiltration agent, and 300 - 1500 parts by mass of crushed stone.

[0024] The penetrant is one or more of silicon asphalt, solvent-based liquid asphalt, emulsified asphalt, and modified emulsified asphalt.

[0025] The crushed stone is single-sized crushed stone with a size of 3-5 mm.

[0026] The beneficial effects of the in-situ hot recycling construction method for rubber asphalt pavement of the present invention are as follows: 1. Aiming at the problem that the mixture of the in-situ hot recycled rubber asphalt pavement has a high viscosity and is difficult to rake, loosen and mix, the present invention solves it by the combined use of the process of step 1 in the recycling method and the material pre-soaking agent.

[0027] Each component in the pre-soaking agent can be compatible with the aged rubber asphalt system and can restore and adjust the aged binder. The pre-soaking agent can quickly penetrate into the interior of the aged pavement, achieving the beneficial effects of reducing the viscosity of the aged rubber asphalt mixture and increasing the workability. In addition, the residual moisture in the emulsified asphalt system infiltrated into the pavement can also play a role in foaming and viscosity reduction during the milling and mixing process of the mixture, enhancing the viscosity reduction effect. In summary, reducing the viscosity of the mixture system, increasing the workability, and restoring the aged binder system are the effects achieved by the pre-soaking agent in step 1.

[0028] 2. Aiming at the problem that the aging process of rubber-modified asphalt is complex, the viscoelasticity decay of the binder system is large and difficult to restore. The four components in the special rubber asphalt regenerant of the present invention work together. They can not only reconcile and restore the components of the aged rubber asphalt binder, promote the reshaping of the network structure of the binder system, but also implement the processes of desulfurization and vulcanization in stages, thereby meeting the technical requirements of in-situ hot recycling technology with low viscosity during milling and mixing and high viscosity during rolling and forming.

[0029] (1) The functions of the first component in the special rubber asphalt regenerant include: Conduct component blending and regeneration restoration on aged matrix asphalt to promote the desulfurization and crosslinking reaction process of crumb rubber modified asphalt, essentially reduce the viscosity of the binder system, increase the constructability of the regeneration process, and in addition, repair the aging degradation products of SBS and crumb rubber. The component blending agent contains a large amount of light components, which can restore the regenerated components of the aged matrix asphalt system and also reduce the viscosity of the binder system. The highly polar light oil promotes the dispersion of asphaltenes in the aged asphalt, reduces the viscosity of the system and increases the fluidity while improving the permeability. In addition, the epoxy groups after ring opening can reconnect the broken SBS and crumb rubber chain segments, contributing to the restoration of the structure. The crosslinked network inside the vulcanized rubber in rubber asphalt severely restricts the entry of asphalt molecules into the crumb rubber, becoming an obstacle to recycling. The peptizer can break the macromolecular chains of rubber, shorten the molecular chains from long to short, reduce the molecular weight of raw rubber and improve plasticity, and also significantly reduce the viscosity of the aged rubber asphalt binder system. SBS and crumb rubber will degrade during construction and service. There are active groups such as hydroxyl groups and carboxyl groups in the degradation products. The isocyanate groups and epoxy groups contained in the repair agent can react with active groups such as hydroxyl groups and carboxyl groups, prompting the reconnection of the broken SBS chain segments and the degraded crumb rubber, and generating new molecular chains with greater rigidity through chemical reactions to achieve the reshaping of the spatial network structure.

[0030] (2) The functions of the second component in the rubber asphalt exclusive regenerant include: Adding dry-process SBS modifiers can avoid the construction problems of wet-process SBS modified asphalt, such as the need for re-preparation and processing and the difficulty of uniform dispersion into the aged binder system, thus enabling more convenient and efficient reshaping and improvement of the road performance of recycled rubber asphalt pavements.

[0031] (3) The functions of the third component in the rubber asphalt exclusive regenerant include: The rubber asphalt prepared from crumb rubber and matrix asphalt can play the role of supplementing excellent and "fresh" binders, forming a hierarchical aged binder system. The warm mix agent can not only reduce the viscosity of the rubber asphalt system, but also act as a physical anti-aging agent for rubber materials to delay the aging of crumb rubber. The anti-aging agent can delay the aging process of the recycled rubber asphalt binder and mixture during service and extend the service life of the pavement.

[0032] (4) The functions of the fourth component in the rubber asphalt exclusive regenerant include: Vulcanizing agents and vulcanization accelerators are used to chemically crosslink the aforementioned linear rubber macromolecules that have been depolymerized into a three-dimensional network structure. The vulcanization equilibrium agent is used to balance the vulcanization system, keeping the vulcanization crosslinking density in a dynamic constant state and eliminating the phenomenon of vulcanization reversion. The fourth component, on the one hand, reduces the active functional groups in the rubber macromolecular structure, increasing chemical stability. On the other hand, the reconstructed three-dimensional network structure can restore the strength and stability of the aged binder, improve the strength and compactness of the recycled pavement, and at the same time avoid the problem of difficult mixing of the recycled binder caused by the vulcanization reaction during the mixing stage.

[0033] In summary, the synergistic cooperation of the rubber asphalt exclusive regenerant in this construction method can solve the problem of difficult regeneration and restoration of rubber asphalt binders. Moreover, the synergistic cooperation of each component and the pre-impregnating agent can solve the problems of high viscosity of waste rubber asphalt mixtures and difficult in-situ hot recycling construction at present.

[0034] 3. To meet the technical requirements of improving skid resistance and reducing water loss in in-situ hot recycled rubber asphalt pavements, the present invention solves this through step 4 in the recycling method.

[0035] In the vulcanized seal coat, the vulcanizing agent, vulcanization accelerator, and vulcanization equilibrium agent penetrate into the road surface after rolling under the drive of the penetrant flow medium and continue to promote the vulcanization reaction. While promoting the overall strength improvement of the road surface interior, it can also strengthen the vulcanization strength of the binder on the road surface layer, achieving a two-way increase in density and strength, which is of great benefit to sealing water on the road surface, improving strength, and bonding crushed stones to increase skid resistance. In addition, besides acting as the above-mentioned flow medium, the penetrant can also achieve the waterproofing of the seal coat and bond single-sized crushed stones. In summary, while ensuring the various performance of the recycled pavement, the vulcanized seal coat endows the in-situ hot recycled rubber asphalt pavement with the functions of skid resistance, wear resistance, water sealing, and water resistance, which is of great benefit to extending the serviceability and service life of the recycled pavement.

[0036] In summary, the combined use of the pre-impregnating agent, the four components of the rubber asphalt exclusive regenerant, and the vulcanized seal coat in this recycling method achieves the technical goals of low viscosity during the milling and mixing stage of the in-situ hot recycled rubber asphalt pavement, high viscosity during the rolling and paving forming stage, and double improvement in skid resistance and water sealing. Specific Embodiments

[0037] The present invention will be further described below in conjunction with embodiments: Example 1

[0038] The upper surface layer of a certain rubber asphalt pavement is 4 cm thick, with an ARAC-13 gradation, and the binder is a rubber powder composite SBS modified asphalt. This section of the road needs to be treated by in-situ hot recycling.

[0039] Pre-impregnating agent: It is composed of 85 parts by mass of emulsified asphalt with a solid content of 30%, 8 parts by mass of naphtha, and 2 parts by mass of D-limonene.

[0040] The first component of the rubber asphalt rejuvenator consists of 50 parts by mass of furfural extract oil, 10 parts by mass of rubber oil, 15 parts by mass of gutter oil, 15 parts by mass of epoxidized soybean oil, 0.4 part by mass of peptizer A86, 0.4 part by mass of peptizer HTA, 4 parts by mass of HDI, and 4 parts by mass of MDI.

[0041] The second component of the rubber asphalt rejuvenator is a dry-process SBS modifier.

[0042] The preparation method of the third component of the rubber asphalt rejuvenator is as follows: Heat 100 parts by mass of 90# petroleum asphalt to 180 °C, then add 15 parts by mass of vulcanized rubber powder and stir for 60 min, then add 3 parts by mass of F-T wax and continue to stir for 25 min, and finally add 0.5 part by mass of anti-aging agent KY-405 and 0.5 part by mass of anti-aging agent NDBC and stir for 20 min to obtain the third component.

[0043] The fourth component of the rubber asphalt rejuvenator consists of 3 parts by mass of 1,1'-dithiobis(hexanecarboxamide), 2 parts of hexasulfide bis(pentamethylene thiuram disulfide), 1 part of accelerator 64#, 0.5 part of accelerator TETD, 0.5 part of Si-17, and 0.5 part of coupling agent Si69-50.

[0044] The curing seal coat consists of 0.5 part by mass of di-tert-butyl peroxide, 0.5 part by mass of diisopropyl xanthogen tetrasulfide, 300 parts of solvent-based liquid asphalt, and 1000 parts of single-sized aggregate with a size of 3-5 mm.

[0045] In-situ hot recycling construction method for rubber asphalt pavement: Step 1: First, clean the pavement to be recycled, and then evenly sprinkle the pre-soaking agent on the pavement surface in steps and fully penetrate and dissolve it. The spreading amount of the pre-soaking agent is 400 g / m 2 ; Step 2: Use the in-situ hot recycling equipment to heat the pavement to be recycled to 180 °C, then rake and mix it to obtain the milled old pavement materials. Add the second component of the rubber asphalt rejuvenator to it, mix evenly, and then add the first component of the rubber asphalt rejuvenator and stir and disperse evenly. The addition amount of the second component is 1% of the mass of the milled old pavement materials, and the addition amount of the first component is 8% of the asphalt mass in the milled old pavement materials; Step 3: Stir and mix the second component of the rubber asphalt rejuvenator with the new aggregate heated to 190 °C evenly. The addition amount of the second component of the rubber asphalt rejuvenator is 2% of the mass of the new aggregate, and then add the third component and mix and stir evenly. The addition amount of the third component is 5.5% of the mass of the new aggregate.

[0046] Step 4: Mix the mixture from Step 2 and Step 3 together at a mass ratio of 9:1, and then add the fourth component of the rubber asphalt regenerant to the mixture. After mixing evenly, conduct in-situ hot recycling paving and rolling construction; the addition amount of the fourth component is 1% of the sum of the asphalt mass in the milled old pavement materials and the mass of the third component.

[0047] Step 5: Uniformly spread the curing seal coat on the freshly paved and rolled recycled pavement, with a spreading amount of 5 kg / m 2 , and use the heating module of the in-situ hot recycling equipment to heat the pavement at 160 °C for 40 min again. Wait for the pavement to cool naturally to complete the construction.

[0048] Table 1 Quality Test Results of the Original Paved Rubber Asphalt Pavement and the In-situ Hot Recycled Rubber Asphalt Pavement Example 2

[0049] The upper layer of a certain rubber asphalt pavement is 4 cm thick, with an ARAC-13 gradation, and the binder is rubber powder composite SBS modified asphalt. Conduct in-situ hot recycling treatment on this section with 100% old material content.

[0050] The pre-soaking agent: It is composed of 85 parts by mass of emulsified asphalt with a solid content of 35%, 8 parts by mass of naphtha, and 2 parts by mass of D-limonene.

[0051] The first component of the rubber asphalt regenerant consists of 50 parts by mass of furfural extract oil, 10 parts by mass of rubber oil, 15 parts by mass of gutter oil, 15 parts by mass of epoxidized soybean oil, 0.4 part by mass of peptizer A86, 0.4 part by mass of peptizer HTA, 4 parts by mass of HDI, and 4 parts by mass of MDI.

[0052] The second component of the rubber asphalt regenerant is a dry-process SBS modifier.

[0053] The fourth component of the rubber asphalt regenerant consists of 3 parts by mass of 1,1'-dithiobis(hexanamide), 2 parts of hexasulfide bis(pentamethylene thiuram disulfide), 1 part of accelerator 64#, 0.5 part of accelerator TETD, 0.5 part of Si-17, and 0.5 part of coupling agent Si69-50.

[0054] The curing seal coat consists of 0.5 part by mass of di-tert-butyl peroxide, 0.5 part by mass of diisopropyl xanthogen tetrasulfide, 300 parts of solvent-based liquid asphalt, and 1000 parts of 3-5 mm single-sized crushed stones.

[0055] In-situ hot recycling construction method for rubber asphalt pavement: Step 1: First, clean the pavement to be recycled, and then uniformly spread the pre-soaking agent on the pavement surface step by step and fully penetrate and dissolve it. The spreading amount of the pre-soaking agent is 400 g / m 2 ; Step 2: Use the in-situ hot recycling equipment to heat the pavement to be recycled to 180°C, then rake and mix it to obtain the milled old pavement materials. Add the second component of the rubber asphalt rejuvenator to it, mix evenly, and then add the first component of the rubber asphalt rejuvenator and stir and disperse evenly. The addition amount of the second component is 1.5% of the mass of the milled old pavement materials, and the addition amount of the first component is 9% of the mass of the asphalt in the milled old pavement materials. Step 3: Add the fourth component of the rubber asphalt rejuvenator to the mixture in Step 2, mix evenly, and then carry out in-situ hot recycling paving and rolling construction. The addition amount of the fourth component is 1.2% of the mass of the asphalt in the milled old pavement materials.

[0056] Step 4: Uniformly spread the sulfurized seal coat on the freshly paved and rolled recycled pavement, with a spreading amount of 4.5 kg / m 2 , and use the heating module of the in-situ hot recycling equipment to heat the pavement to 155°C again for 45 minutes, and wait for the pavement to cool naturally to complete the construction.

[0057] Table 2 Quality inspection results of the original paved rubber asphalt pavement and the 100% old material in-situ hot recycled rubber asphalt pavement

Claims

1. A method for in-situ hot regeneration of rubber asphalt pavement, characterized in that: The specific steps of the construction method are: Step 1: First, clean the road surface to be regenerated, then evenly spread the pre-impregnant on the road surface step by step and fully penetrate and dissolve it. The amount of pre-impregnant spread should not be less than 300g / m 2 ; Step 2: After heating the regenerated pavement at 160-195°C, harrow and stir to obtain the milled pavement, add the second component of the rubber asphalt regeneration agent to it, mix evenly, then add the first component of the rubber asphalt regeneration agent, stir and disperse evenly; the amount of the second component added is 0.1-5% of the mass of the milled pavement, and the amount of the first component added is 1-20% of the mass of the asphalt in the milled pavement; Step 3: Add the fourth component of the rubber asphalt regeneration agent to the mixture of step 2, mix well and then perform on-site hot regeneration paving and rolling construction; the amount of the fourth component added is 0.2-2% of the mass of asphalt in the old road milling material; Step 4: Finally, spread the vulcanized seal layer evenly, with a spreading amount of 3-9kg / m 2 , then heat the road surface at no less than 110℃ for 10-60min, wait for the road surface to cool naturally, and complete the in-situ hot regeneration construction.

2. The construction method according to claim 1, characterized in that: In the step 2, new aggregate heated to 165-200°C is also added to be mixed with the second component and the third component of the rubber asphalt regeneration agent, the amount of the second component added is 0.1-5% of the mass of the new aggregate, and the amount of the third component added is 3-7% of the mass of the new aggregate; at this time, the amount of the fourth component added in step 3 is 0.2-2% of the sum of the mass of asphalt in the old road milling material and the mass of the third component.

3. The construction method according to claim 1 or 2, characterized in that: The prepreg is composed of 80-98 parts by mass of low-solid emulsified asphalt and / or low-solid modified emulsified asphalt, 1-10 parts by mass of naphtha and 1-10 parts by mass of D-limonene.

4. The construction method according to claim 1 or 2, characterized in that: The first component material is composed of a mixture of 50-80 parts by mass of a component regulator, 5-25 parts by mass of a light oil, 0.5-10 parts by mass of a peptizer and 1-10 parts by mass of a repair agent; the component regulator is one or more of furfural extracted oil, rubber oil, lubricating oil base oil, FCC slurry, aromatic oil, waste engine oil, vegetable oil, and waste cooking oil; the repair agent is one or more of BDDE, HDI, MDI, EPR, PAPI, and trimethylolpropane triglycidyl ether.

5. The construction method according to claim 1 or 2, characterized in that: The second component is a dry SBS modifier.

6. The construction method according to claim 1 or 2, characterized in that: The preparation method of the third component is: heating 100 parts by mass of petroleum asphalt to 160-190° C., then adding 1-18 parts by mass of rubber powder and stirring for 30-80 minutes, then adding 1-3 parts by mass of warm-mix agent and continuing to stir for 15-30 minutes, and finally adding 0.2-3 parts by mass of anti-aging agent and stirring for 15-30 minutes to obtain the third component; the warm-mix agent is one or more of PE wax, FT wax, oxidized PE wax, and microcrystalline wax.

7. The construction method according to claim 1 or 2, characterized in that: The fourth component consists of 1-8 parts by mass of a vulcanizing agent, 1-4 parts by mass of a vulcanization accelerator and 1-4 parts by mass of a vulcanization balancing agent.

8. The construction method according to claim 7, characterized in that: The vulcanization seal layer is composed of 0.1-2 parts by mass of a vulcanizing agent, 0.1-2 parts by mass of a vulcanization accelerator, 100-500 parts by mass of a penetrant, and 300-1500 parts by mass of crushed stone.

9. The construction method according to claim 8, characterized in that: The vulcanizing agent is one or more of a mixture of p-tert-butylphenol disulfide and stearic acid, brominated p-tert-octylphenol formaldehyde resin, p-tert-octylphenol formaldehyde resin, p-tert-butylphenol formaldehyde resin, di-tert-butyl peroxide, diisopropylbenzene peroxide, tert-butyl perbenzoate, dibenzoyl-p-benzoquinone dioxime, N'N-m-phenylene bismaleimide, N,N'-4,4'-diphenylmethane bismaleimide, 1,1'-dithiobiscaprolactam, and dipentamethylenethiuram hexasulfide; The accelerator is one or more of accelerator ZMBT, accelerator 64#, accelerator TBzTD, accelerator TIBTD, accelerator TeDEC, accelerator SbDEC, accelerator ZDIBC, accelerator TMTM, accelerator TETD, accelerator DBTU, and diisopropyl xanthogen tetrasulfide; the vulcanization balance agent is one or more of Si-17, coupling agent Si69-50, 1,3-bis(citricarboxylic imide methyl)benzene, and dihydrated disodium hexamethylene dithiosulfate.

10. The construction method according to claim 8, characterized in that: The penetrant is one or more of silicon asphalt, solvent-based liquid asphalt, emulsified asphalt, and modified emulsified asphalt.

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