Regenerated rubber and plastic asphalt composite modifier based on shear force-temperature-interface modification as well as preparation method and application of regenerated rubber and plastic asphalt composite modifier

Abstract

The invention relates to a regenerated rubber and plastic asphalt composite modifier based on shear force-temperature-interface modification as well as a preparation method and application thereof. The regenerated rubber and plastic asphalt composite modifier comprises 65-75 parts of tire rubber powder, 17-25 parts of polyethylene, 8-12 parts of aromatic oil and 0-2 parts of a silane coupling agent (not 0). All the raw materials are mixed and then added into a double-screw extruder, gradient temperature control is conducted through a feeding area, a plasticizing area and a homogenizing area, and finally granulation is conducted to obtain the regenerated rubber and plastic asphalt composite modifier. Compared with the prior art, the invention creatively utilizes the effects of double-screw shear force, high temperature, interface activation of the silane coupling agent, physical melting recombination and chemical interface activation, efficiently improves the integration and activation efficiency and effect of the tire rubber powder and polyethylene, and greatly improves the performance of the modified asphalt.

Description

Technical Field

[0001] The present invention relates to the technical field of traffic engineering building materials, and in particular to a recycled rubber-plastic asphalt composite modifier based on shear force-temperature-interface modification, and a preparation method and application thereof. Background Art

[0002] Asphalt pavement is the most commonly used type of pavement on high-grade highways. Asphalt, as a key component, continues to see strong consumption as demand for highway reconstruction, expansion, and maintenance increases. Asphalt binder is key to the function and lifespan of asphalt pavement, and its quality requirements are increasing. Currently, polymer-modified asphalts such as SBS, SEBS, and TPS are often used in large-scale high-grade highway asphalt pavements to improve the material's service performance. However, polymers such as SBS have issues such as improved aging resistance, high cost, high resource consumption, and insufficient environmental friendliness. Therefore, there is an urgent need to develop low-cost, sustainable modified asphalt materials to support the construction of high-quality and green highways.

[0003] Tires and plastics contain high-molecular polymers that can improve the quality of asphalt and are high-quality raw materials for asphalt modification. Recycled rubber and plastic modified asphalt can achieve durability, improved adhesion, material sustainability and cost control through the recycling of resources such as waste tires and polyethylene. The synergistic existence of rubber due to its aging softening characteristics and asphalt aging hardening characteristics can improve the aging performance of modified asphalt. The regular molecular chain structure and crystallization behavior of polyethylene can improve the elasticity and deformation resistance of asphalt. However, as a composite material, the rubber phase and polyethylene phase form a multiphase system in the asphalt. Affected by the differences in the modification preparation process and polymer disposal methods, the free distribution and mutual penetration and cross-linking of rubber and polyethylene in the asphalt phase are random, resulting in poor storage stability and difficulty in fully exerting their high and low temperature modification effects.

[0004] In recent years, studies have been conducted on rubber powder and polyethylene through different pretreatment methods such as melt blending or high-temperature desulfurization. For example, patent CN103709770A discloses a polyethylene / rubber powder blended modified asphalt and its preparation method. Rubber powder, polyethylene and a cross-linking agent are melt-extruded at 160°C to 190°C through a twin-screw extruder to obtain a polyethylene / rubber powder blend, which is then mixed and sheared with matrix asphalt to obtain modified asphalt. This activation method has problems such as insufficient targeting and low activation efficiency. Therefore, it is urgent to develop a new activation method to ensure that the tire rubber and polyethylene plastic content and effect are fully compatible and the modification effect is achieved while improving the tire rubber and polyethylene plastic content and effect. Summary of the Invention

[0005] The purpose of the present invention is to overcome the problems of poor storage stability and poor high and low temperature modification in the existing technology of combining rubber and polyethylene, and thus provide a recycled rubber-plastic asphalt composite modifier based on shear force-temperature-interface modification and its preparation method and application.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] One of the technical solutions of the present invention is to provide a recycled rubber-plastic asphalt composite modifier based on shear force-temperature-interface modification, including 65-75 parts of tire rubber powder, 17-25 parts of polyethylene, 8-12 parts of aromatic oil, and 0-2 parts of silane coupling agent (not 0).

[0008] In some specific embodiments, the tire rubber powder is selected from tire rubber powder having a particle size of 40 to 60 mesh, a Mooney viscosity ≤ 95, and a relative density of 1 to 1.15;

[0009] The polyethylene is selected from polyethylene with a relative density of 0.94 to 1.15, a particle size of ≤3 mm, and a melt index (MFI) ≥1 g / 10 min;

[0010] The aromatic oil is selected from a group consisting of aromatic oils with a kinematic viscosity of 10 to 40 mm 2 / s of aromatic oil;

[0011] The silane coupling agent is 3-aminopropyltriethoxysilane.

[0012] More preferably, the tire rubber powder is selected from tire rubber powder with a particle size of 40 to 60 mesh, a Mooney viscosity of ≤95, and a relative density of 1 to 1.1;

[0013] The polyethylene is selected from polyethylene with a relative density of 0.95 to 1.05, a particle size of ≤2 mm, and a melt index (MFI) of (1 to 4) g / 10 min.

[0014] The second technical solution of the present invention is to provide a method for preparing the recycled rubber-plastic-asphalt composite modifier as described in one of the above technical solutions, comprising the following steps:

[0015] S1. Mix tire rubber powder, polyethylene, aromatic oil, and silane coupling agent in parts by mass to obtain a mixture A;

[0016] S2, adding the mixture A from step S1 into a twin-screw extruder, and adopting gradient temperature control in the feeding zone, plasticizing zone, and homogenizing zone to obtain a mixture B;

[0017] S3. Granulate the mixture B obtained in step S2 to form granules, which are a recycled rubber-plastic-asphalt composite modifier.

[0018] In some specific embodiments, in step S2, the speed of the twin-screw extruder is 15 r / min.

[0019] In some specific embodiments, in step S2, the temperatures of the feeding zone, the plasticizing zone, and the homogenizing zone are 200-240°C, 240-300°C, and 260-300°C, respectively.

[0020] More preferably, the temperature ratios of the feeding zone, plasticizing zone and homogenizing zone are 240°C, 260°C and 260°C.

[0021] In some specific embodiments, in step S3, the particle size of the particles is 1-3 mm.

[0022] The third technical solution of the present invention is to provide an application of the recycled rubber-plastic asphalt composite modifier as described in one of the above technical solutions in the preparation of modified asphalt.

[0023] In some specific embodiments, the method for preparing modified asphalt using the regenerated rubber-plastic asphalt composite modifier comprises the following steps:

[0024] Add recycled rubber-plastic asphalt composite modifier to the flowing matrix asphalt, stir, shear and mix at high temperature, and obtain modified asphalt after heat preservation and development.

[0025] The mass ratio of the matrix asphalt to the recycled rubber-plastic asphalt composite modifier is 100:(15-35).

[0026] In some embodiments, the high temperature is 175-185°C;

[0027] The stirring speed is 300-500 r / min each time, and the stirring time is 20-30 min each time;

[0028] The shearing speed is 4000-5000 r / min, and the shearing time is 50-70 min;

[0029] The temperature of the thermal insulation development is 175-180°C, and the time of the thermal insulation development is 20-40 minutes.

[0030] More preferably, the high temperature is 185°C and the temperature for thermal insulation and development is 175°C.

[0031] In some specific embodiments, the base asphalt is petroleum asphalt.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] (1) The present invention innovatively utilizes the shear force of the twin-screw, high temperature and interfacial activation of the silane coupling agent, and synergizes the effects of physical melt reorganization and chemical interfacial activation to effectively improve the integration, activation efficiency and effect of tire rubber powder and polyethylene. The present invention first utilizes the shear force of the twin-screw and the activation effect of the three-zone gradient heating to dissociate the stable internal structure of the tire rubber powder and polyethylene, and the two are combined to form a secondary cross-linked network, integrating the performance of the two. During the entire shear and high temperature process, the silane coupling agent releases active amino groups and other substances to enhance the surface activity of the rubber-based elastomer, thereby more efficiently improving the reaction compatibility between the modifier and asphalt, and balancing and improving the modification effect (balancing and improving high temperature performance, low temperature performance, storage stability, anti-aging performance, while ensuring that the viscosity is within a reasonable range).

[0034] (2) Compared with SBS, the low-density polyethylene selected in the present invention has more significant deformation resistance and cost advantages, and the low-density polyethylene can be derived from common plastic waste, and the source is controllable and widely available.

[0035] (3) The tire rubber powder and low-density polyethylene used in the present invention can both be derived from solid waste, which can significantly reduce costs while ensuring performance. It also solves the problem of urgent need to treat industrial solid waste and has significant economic and social benefits.

[0036] (4) The preparation process of the present invention is simple, efficient, easy to operate, and low in cost, and can be easily promoted and applied in practical engineering. DETAILED DESCRIPTION

[0037] The present invention is described in detail below with reference to specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0038] In the following examples and comparative examples, unless otherwise specified, raw materials or processing techniques are conventional commercially available raw materials or conventional processing techniques in the art.

[0039] Example 1

[0040] This embodiment provides a recycled rubber-plastic asphalt composite modifier and modified asphalt based on shear force-temperature-interface modification.

[0041] In this embodiment, the composition and mass proportion of each raw material of the modifier are as follows: 68 parts of 60-mesh waste tire rubber powder, 20 parts of recycled low-density polyethylene, 10 parts of aromatic oil, and 2 parts of silane coupling agent. Among them, the waste tire rubber powder was purchased from Chengdu Sitong Rubber and Plastic Co., Ltd., which is a 60-mesh rubber powder processed by a room temperature crushing method of truck tires; the recycled low-density polyethylene was purchased from Yuyao Hechang Plastic Chemical Co., Ltd., which is black 2MFI / RLDPE; the aromatic oil was purchased from Hengshui Junwei New Material Technology Co., Ltd., which is a special aromatic oil for road asphalt; the silane coupling agent is 3-aminopropyltriethoxysilane, which was purchased from Dongguan Kangjin New Material Technology Co., Ltd.

[0042] The basic properties of waste tire rubber powder, recycled low-density polyethylene and aromatic oil are shown in Tables 1, 2 and 3.

[0043] Table 1 Basic properties of waste tire rubber powder

[0044] index value unit relative density 1.05～1.15 / Mooney viscosity ML (1+4) 100℃ 91 Pa·s ash content 6 ％ Acetone extract 1.5 ％ Rubber hydrocarbon content 48 ％ Carbon black content 32 ％

[0045] Table 2 Basic properties of recycled low-density polyethylene

[0046] index value unit color black —— Particle size 2～3 mm density 0.98 <![CDATA[g / cm 3 ]]> Melt Flow Index (MFI) 2 g / 10min Elongation at break 300 ％

[0047] Table 3 Product indicators of aromatic oil for road asphalt

[0048] Test items value unit Kinematic viscosity (ratio of dynamic viscosity to density) 25 <![CDATA[100℃,mm 2 / s]]> Open flash point 220 ℃ Moisture 0.01 ％ density 0.96 <![CDATA[g / m 3 ]]> Appearance Tan -

[0049] The preparation method of the recycled rubber-plastic asphalt composite modifier based on shear force-temperature-interface modification comprises the following steps:

[0050] (1) adding waste tire rubber powder, recycled low-density polyethylene, aromatic oil, and silane coupling agent in a ratio of 68:20:10:2 by mass into a container, stirring and mixing uniformly to obtain a mixture A;

[0051] (2) Mixture A was added to a twin-screw extruder at a speed of 15 r / min. A three-zone gradient temperature control was used, with the temperatures of the feeding zone, plasticizing zone, and homogenizing zone being 240° C., 260° C., and 260° C., respectively. Circulating shear extrusion mode was not used to prepare mixture B.

[0052] (3) The mixture B is passed through an air cooler and granulated into 1-3 mm particles by a pelletizer to obtain a recycled rubber-plastic asphalt composite modifier.

[0053] The composition and mass proportion of each raw material of modified asphalt are as follows: 100 parts of asphalt, 30 parts of recycled rubber and plastic asphalt composite modifier, among which the asphalt was purchased from Sinopec Zhenhai Refining and Chemical Company and is petroleum asphalt for Road No. 70.

[0054] The preparation method of the modified asphalt comprises the following steps:

[0055] (1) Heat 100 parts of base asphalt at about 172°C until it becomes fully fluid.

[0056] (2) Slowly add 30 parts of recycled rubber-plastic asphalt composite modifier to the base asphalt. During this process, a mixer is used for continuous stirring at a stirring speed of about 400 r / min and a stirring time of 30 min. Stir evenly until there are no obvious particles to obtain mixture B.

[0057] (3) Mixture B was sheared using a high-speed shearing machine at a shearing speed of 4500 r / min and a shearing time of 60 min to obtain mixture C.

[0058] (4) Mixture C was continuously stirred using a stirrer at a stirring speed of 500 r / min for 30 min to obtain mixture D.

[0059] The operations from steps (2) to (4) are all carried out at 185°C.

[0060] (5) The mixture D is kept warm and developed for 30 minutes at a development temperature of 175°C. After the development is completed, the recycled rubber-plastic composite modified asphalt is obtained.

[0061] Example 2

[0062] This embodiment provides a recycled rubber-plastic asphalt composite modifier and modified asphalt based on shear force-temperature-interface modification.

[0063] In this embodiment, the composition and mass proportion of each raw material of the modifier are as follows: 64 parts of 60-mesh waste tire rubber powder, 19 parts of recycled low-density polyethylene, 16 parts of aromatic oil, and 1 part of silane coupling agent. Among them, the waste tire rubber powder was purchased from Chengdu Sitong Rubber and Plastic Co., Ltd., which is a 60-mesh rubber powder processed by a room temperature crushing method for truck tires; the recycled low-density polyethylene was purchased from Yuyao Hechang Plastic Chemical Co., Ltd., which is black 2MFI / RLDPE; the aromatic oil was purchased from Hengshui Junwei New Material Technology Co., Ltd., which is a special aromatic oil for road asphalt; the silane coupling agent is 3-aminopropyltriethoxysilane, which was purchased from Dongguan Kangjin New Material Technology Co., Ltd.

[0064] The basic properties of waste tire rubber powder, recycled low-density polyethylene, and aromatic oil are the same as those in Example 1.

[0065] The preparation method of the recycled rubber-plastic asphalt composite modifier based on shear force-temperature-interface modification comprises the following steps:

[0066] (1) adding waste tire rubber powder, recycled low-density polyethylene, aromatic oil, and silane coupling agent in a ratio of 64:19:16:1 by mass into a container, stirring and mixing uniformly to obtain a mixture A;

[0067] (2) Mixture A was added to a twin-screw extruder at a speed of 15 r / min. A three-zone gradient temperature control was used, with the temperatures of the feeding zone, plasticizing zone, and homogenizing zone being 240° C., 260° C., and 260° C., respectively. Circulating shear extrusion mode was not used to prepare mixture B.

[0068] (3) The mixture B is passed through an air cooler and granulated into 1-3 mm particles by a pelletizer to obtain a recycled rubber-plastic asphalt composite modifier.

[0069] The composition and mass ratio of the raw materials of the modified asphalt in this embodiment and the preparation method are the same as those in Example 1.

[0070] Example 3

[0071] This embodiment provides a recycled rubber-plastic asphalt composite modifier and modified asphalt based on shear force-temperature-interface modification.

[0072] In this embodiment, the composition and mass ratio of each raw material of the modifier and the preparation method are consistent with those in Example 1.

[0073] The composition and mass proportion of each raw material of modified asphalt are as follows: 100 parts of asphalt, 20 parts of recycled rubber and plastic asphalt composite modifier, among which the asphalt was purchased from Sinopec Zhenhai Refining and Chemical Company and is petroleum asphalt for Road No. 70.

[0074] The preparation method of the modified asphalt comprises the following steps:

[0075] (1) Heat 100 parts of base asphalt at about 172°C until it becomes fully fluid.

[0076] (2) Slowly add 20 parts of recycled rubber-plastic asphalt composite modifier to the base asphalt. During this process, a mixer is used for continuous stirring at a stirring speed of about 400 r / min and a stirring time of 30 min. Stir evenly until there are no obvious particles to obtain mixture B.

[0077] (3) Mixture B was sheared using a high-speed shearing machine at a shearing speed of 4500 r / min and a shearing time of 60 min to obtain mixture C.

[0078] (4) Mixture C was continuously stirred using a stirrer at a stirring speed of 500 r / min for 30 min to obtain mixture D.

[0079] The operations from steps (2) to (4) are all carried out at 185°C.

[0080] (5) The mixture D is kept warm and developed for 30 minutes at a development temperature of 175°C. After the development is completed, the recycled rubber-plastic composite modified asphalt is obtained.

[0081] Comparative Example 1

[0082] This comparative example provides a recycled rubber-plastic asphalt composite modifier and modified asphalt preparation.

[0083] Compared with Example 1, most of the components are the same, and the only difference is that the raw material composition of the modifier does not contain a silane coupling agent.

[0084] That is, the mass proportions of the modifier in the comparative example are as follows: 68 parts of 60-mesh waste tire rubber powder, 20 parts of recycled low-density polyethylene, and 10 parts of aromatic oil.

[0085] Comparative Example 2

[0086] This comparative example provides a recycled rubber-plastic asphalt composite modifier and modified asphalt.

[0087] Compared with Example 1, most of them are the same, the only difference is:

[0088] When preparing the modifier, the raw materials were not prepared using a twin-screw extruder, but were stirred in a dispersed form according to the same mass ratio as in Example 1.

[0089] The process of the dispersed form is: simply stir and mix the raw materials in a container.

[0090] Comparative Example 3

[0091] This comparative example provides a recycled rubber-plastic asphalt composite modifier and modified asphalt.

[0092] Compared to Example 1, most of the components are identical, differing only in the raw material composition and weight ratio of the modifier, which is as follows: 77 parts of 60-mesh scrap tire rubber powder and 23 parts of recycled low-density polyethylene. Furthermore, this modifier is not prepared through a twin-screw extruder, but rather is prepared in a dispersed form according to the weight ratio of the raw materials.

[0093] Comparative Example 4

[0094] This comparative example provides an SBS modified asphalt and its preparation. The raw material composition and weight ratio are as follows: 100 parts of base asphalt and 4 parts of SBS. The SBS is type 791 and was purchased from Beijing Yanshan Branch of Sinopec.

[0095] Other steps are the same as in Example 1.

[0096] Comparative Example 5

[0097] This comparative example provides a desulfurized rubber powder-modified asphalt and its preparation. The raw material composition and mass ratio are as follows: 100 parts base asphalt, 20 parts desulfurized tire rubber powder. The desulfurized tire rubber powder has a particle size of 60-mesh truck tire desulfurized rubber powder, purchased from Chengdu Sitong Rubber & Plastic Co., Ltd., and is obtained by high-temperature desulfurization of 60-mesh truck tire rubber powder using a room-temperature crushing method. The basic properties of the desulfurized tire rubber powder are shown in Table 4. The preparation method of this desulfurized tire rubber powder-modified asphalt is the same as that in Example 1.

[0098] Table 4 Basic properties of desulfurized tire rubber powder

[0099] index value unit relative density 1.15 / ash content 4.5 ％ Acetone extract 6 ％ Rubber hydrocarbon content 48 ％ Carbon black content 32 ％

[0100] Comparative Example 6

[0101] This comparative example provides a recycled rubber-plastic asphalt composite modifier and modified asphalt.

[0102] Compared with Example 1, most of them are the same, and the only difference is that in step (2), the temperatures of the feeding zone, plasticizing zone, and homogenizing zone are set to 180° C., 200° C., and 200° C., respectively.

[0103] The modified asphalts prepared in Examples 1 to 3 and Comparative Examples 1 to 6 were tested, and the results are shown in Table 5:

[0104] Table 5 Comparison of asphalt properties between examples and comparative examples

[0105]

[0106]

[0107] As can be seen from the above table, compared with all the comparative examples, the embodiments of the present invention can well balance high-temperature performance (reflected in the improvement of softening point), low-temperature performance (reflected in the improvement of ductility), and storage stability (reflected in the reduction of softening point difference), and all indicators meet and exceed the requirements of "Road Waste Tire Rubber Powder Rubber Asphalt (JT / T798-2019)".

[0108] Compared with Comparative Example 1, Example 1 improves the high-temperature performance, low-temperature performance, and storage stability of the modified asphalt in a balanced manner. It can be seen that in the present invention, the silane coupling agent can release active amino groups during the entire shear and high-temperature process to enhance the surface activity of the rubber-based elastomer, thereby more efficiently improving the reaction compatibility between the modifier and asphalt and improving the modification effect in a balanced manner.

[0109] Compared with Comparative Examples 2 and 6, Example 1 improves the low-temperature performance, storage stability, and anti-aging performance of the modified asphalt in a balanced manner, while ensuring that the viscosity is within a reasonable range. It can be seen that in the present invention, the shear force of the twin-screw and the activation effect of the three-zone gradient heating can be utilized to dissociate the tire rubber powder and the stable internal structure of the polyethylene, and the two are combined to form a secondary cross-linked network, integrating the performance of the two.

[0110] Compared with Example 3, although Example 3 has better high-temperature performance, its waste tire rubber powder and recycled low-density polyethylene have not been activated, have poor compatibility, and retain larger particles inside, resulting in poor low-temperature ductility and storage stability, and excessively high viscosity, which affects the compaction performance during construction.

[0111] Compared with Comparative Examples 4 and 5, Example 1 also balancedly improves the high-temperature performance, storage stability, and anti-aging performance of the modified asphalt, and is significantly better than traditional asphalt modifiers. It can be seen that the modifier prepared by the present invention has a more comprehensive improvement in high and low temperature performance, aging performance, and storage stability for asphalt compared with SBS and desulfurized rubber powder.

[0112] The above description of the embodiments is intended to facilitate understanding and use of the invention by those skilled in the art. It will be apparent that those skilled in the art can readily make various modifications to these embodiments and apply the general principles described herein to other embodiments without requiring inventive effort. Therefore, the present invention is not limited to the above-described embodiments. Improvements and modifications made by those skilled in the art based on the disclosure of the present invention, without departing from the scope of the present invention, should be within the scope of protection of the present invention.

Claims

1. A recycled rubber-plastic asphalt composite modifier based on shear force-temperature-interface modification, characterized in that: The invention comprises 65-75 parts of tire rubber powder, 17-25 parts of polyethylene, 8-12 parts of aromatic oil and 0-2 parts of silane coupling agent (0 is not allowed).

2. The recycled rubber-plastic asphalt composite modifier according to claim 1, characterized in that: The tire rubber powder is selected from tire rubber powder with a particle size of 40 to 60 mesh, a Mooney viscosity of ≤95, and a relative density of 1 to 1.15; The polyethylene is selected from polyethylene with a relative density of 0.94 to 1.15, a particle size of ≤3 mm, and a melt index (MFI) ≥1 g / 10 min; The aromatic oil is selected from a group consisting of aromatic oils with a kinematic viscosity of 10 to 40 mm 2 / s of aromatic oil; The silane coupling agent is 3-aminopropyltriethoxysilane.

3. A method for preparing the recycled rubber-plastic-asphalt composite modifier according to any one of claims 1 or 2, characterized in that: The steps include: S1. Mix tire rubber powder, polyethylene, aromatic oil, and silane coupling agent in parts by mass to obtain a mixture A; S2, adding the mixture A from step S1 into a twin-screw extruder, and adopting gradient temperature control in the feeding zone, plasticizing zone, and homogenizing zone to obtain a mixture B; S3. Granulate the mixture B obtained in step S2 to form granules, which are a recycled rubber-plastic-asphalt composite modifier.

4. The preparation method according to claim 3, characterized in that In step S2, the speed of the twin-screw extruder is 15 r / min.

5. The preparation method according to claim 3, characterized in that In step S2, the temperatures of the feeding zone, the plasticizing zone, and the homogenizing zone are 200-240°C, 240-300°C, and 260-300°C, respectively.

6. The preparation method according to claim 3, characterized in that In step S3, the particle size of the particles is 1 to 3 mm.

7. Use of the regenerated rubber-plastic asphalt composite modifier according to any one of claims 1 or 2 in the preparation of modified asphalt.

8. The use according to claim 7, characterized in that The method for modifying asphalt using the regenerated rubber-plastic asphalt composite modifier comprises the following steps: Add recycled rubber-plastic asphalt composite modifier to the flowing matrix asphalt, stir, shear and mix at high temperature, and obtain modified asphalt after heat preservation and development. The mass ratio of the matrix asphalt to the recycled rubber-plastic asphalt composite modifier is 100:(15-35).

9. The use according to claim 8, characterized in that The high temperature is 175-185°C; the stirring speed is 300-500 r / min, and the stirring time is 20-30 minutes. The shearing speed is 4000-5000 r / min, and the shearing time is 50-70 min; The temperature of the thermal insulation development is 175-180°C, and the time of the thermal insulation development is 20-40 minutes.

10. The use according to claim 8, characterized in that The matrix asphalt is petroleum asphalt.

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