Bionic high-adhesion asphalt modifier, modified asphalt material and preparation method thereof

Abstract

The present invention relates to the technical field of road and building material modification, and specifically to a bionic high-adhesion asphalt modifier, a modified asphalt material and a preparation method thereof. The high-adhesion asphalt modifier comprises, by volume parts, 45-65 parts of a solvent component, 27-40 parts of a hydrogen bond component, 4-8 parts of a metal coordination component and 4-8 parts of an initiator component; the solvent component and the hydrogen bond component each contain at least one of a hydroxyl group and a carboxyl group, and the hydrogen bond component further contains a carbon-carbon double bond; the initiator is a free radical initiator. Based on the supramolecular action composed of reversible intermolecular interactions, the present invention mimics the complex adhesion mechanism of aquatic mussels on the surfaces of different media, so that the modified asphalt material has high adhesion characteristics similar to those of mussels without affecting its road performance, effectively enhances the adhesion force between it and aggregates, reduces the risk of asphalt peeling, reduces the damage of rainwater to asphalt pavements, prolongs their service life, and has a simple preparation process and low cost.

Description

Technical Field

[0001] The present invention relates to the technical field of road and building material modification, and particularly to a bionic high-adhesion asphalt modifier, a modified asphalt material and a preparation method thereof. Background Art

[0002] With the popularization and application of asphalt pavement structures in the paving types of high-grade highways, the selection and design of asphalt pavement materials have attracted much attention. General asphalt materials are easily affected by rainwater scouring, and their adhesion ability decreases in the water environment, resulting in the behavior of asphalt peeling off from the aggregate surface, thus leading to water damage phenomena such as looseness and potholes on the asphalt pavement.

[0003] The adhesion between asphalt materials and aggregates is greatly affected by complex external environments. Direct application in road construction will have the risk of various water damages. Therefore, it is necessary to provide a high-adhesion asphalt material to endow it with stronger adhesion ability to aggregates and extend the service life of the pavement. Summary of the Invention

[0004] The purpose of the present invention is to apply bionics means to provide a bionic high-adhesion asphalt modifier, a modified asphalt material and a preparation method thereof, so as to solve the problems existing in the above-mentioned prior art, make the asphalt material have stronger adhesion characteristics, and still be able to tightly adhere to the aggregate surface under complex external environments, thereby extending the service life of the pavement.

[0005] To achieve the above purpose, the present invention provides a high-adhesion asphalt modifier, which includes by volume: 45-65 parts of a solvent component, 27-40 parts of a hydrogen bond component, 4-8 parts of a metal coordination component, and 4-8 parts of an initiator component; the solvent component and the hydrogen bond component each contain at least one of a hydroxyl group and a carboxyl group, and the hydrogen bond component further contains a carbon-carbon double bond; the initiator is a free radical initiator. Designed in this way, based on reversible intermolecular interactions of hydrogen bonds and metal coordination bonds, under the action of the initiator component, the solvent component, the hydrogen bond component and the metal coordination component are cross-linked and bonded to form supramolecular interactions. This supramolecular cross-linked structure can significantly improve the adhesion of the asphalt matrix, thereby improving the service life of the pavement.

[0006] Further preferably, the high-adhesion asphalt modifier includes by volume: 50-60 parts of a solvent component, 30-35 parts of a hydrogen bond component, 5-7 parts of a metal coordination component, and 5-7 parts of an initiator component.

[0007] Furthermore, the solvent component includes a chitosan aqueous solution; chitosan contains a large number of hydroxyl groups and amino groups, which can serve as hydrogen bond sites to improve the cross-linking effect, and the amino groups can further improve the intermolecular force through electrostatic interaction.

[0008] Preferably, the chitosan aqueous solution comprises glacial acetic acid, chitosan and distilled water with a mass ratio of 2.5 - 3.5:4 - 6:90 - 94; the chitosan aqueous solution has a certain viscosity, which can improve the viscosity of the subsequent modifier, thereby achieving a small solid content and high adhesiveness, reducing the dosage of modifier raw materials and lowering the cost.

[0009] Preferably, the deacetylation degree of the chitosan is greater than or equal to 95%.

[0010] Furthermore, the hydrogen bond component includes an unsaturated acid or its derivative; preferably, the unsaturated acid includes an unsaturated acid having 3 - 18 carbon atoms; more preferably, the unsaturated acid is one or more of acrylic acid, crotonic acid, pentenoic acid, and acrylic acid is preferably used. The carboxyl group in the unsaturated acid molecule can serve as a crosslinking site to form a crosslinked structure with metal ions and the solvent component, and further form a supramolecular interaction through double bond polymerization. In the present invention, the use of small molecule unsaturated acids facilitates crosslinking with metal ions and the solvent component, preventing the problem that the crosslinked structure is limited due to restricted molecular movement when directly using acrylic acid polymers.

[0011] Furthermore, the metal coordination component includes one or more of iron salts, aluminum salts, and zinc salts; preferably an iron salt solution; preferably, the metal coordination component includes ferric chloride hexahydrate and distilled water with a mass ratio of 2 - 3:97 - 98.

[0012] Furthermore, the initiator component includes a potassium persulfate solution, a sodium persulfate solution, or an ammonium persulfate solution; preferably, the potassium persulfate solution includes potassium persulfate and distilled water with a mass ratio of 5 - 6:94 - 95.

[0013] To achieve the above object, the present invention provides a preparation method of a high - adhesion asphalt modifier, comprising: sequentially adding the hydrogen bond component, the metal coordination component, and the initiator component to the solvent component according to the ratio, and performing stirring to obtain the modifier. By operating in this way, first, the hydrogen bond component forms a hydrogen bond interaction with the solvent component, then the coordination component is added to form a coordination bond, and then under the action of the initiator, the initially formed crosslinked structure is further polymerized to increase the crosslinking richness, thereby obtaining a high - adhesion modifier.

[0014] Furthermore, the stirring temperature is 18 - 25 °C; the stirring rate is 850 - 950 revolutions per minute; the stirring times of the hydrogen bond component, the metal coordination component, and the initiator component are 70 - 90 minutes, 15 - 25 minutes, and 70 - 90 minutes, respectively.

[0015] Further, prepare the above solvent component, hydrogen bond component, metal coordination component and initiator component under the condition of 18 - 25°C, and successively mix the above solvent component, hydrogen bond component, metal coordination component and initiator component for 70 - 90 minutes, 15 - 25 minutes and 70 - 90 minutes under the same temperature and the working condition of 850 - 950 revolutions per minute.

[0016] To achieve the above object, the present invention provides a modified asphalt material, comprising an asphalt matrix and a high - adhesion asphalt modifier.

[0017] Further, the mass content of the high - adhesion asphalt modifier in the modified asphalt material is 1 - 10%; the asphalt modifier prepared by the present invention has extremely high adhesion, so the adhesion of the asphalt material can be ensured with a lower dosage, thereby reducing the modification cost.

[0018] Preferably, the preparation method of the modified asphalt material comprises: heating the asphalt matrix to 130 - 140°C, and then adding the high - adhesion asphalt modifier and mixing to obtain the modified asphalt material.

[0019] Preferably, first mix under the condition of 4000 - 4500 revolutions per minute for 30 - 50 minutes, and then mix under the condition of 1000 - 1500 revolutions per minute for 8 - 15 minutes.

[0020] Based on the reversible intermolecular interactions of hydrogen bonds and metal coordination bonds, under the action of the initiator component, the solvent component, hydrogen bond component and metal coordination component cross - link and bond with each other to form a supramolecular interaction. The principle is as follows: -OH in the solvent component can form a hydrogen bond with -COOH in the hydrogen bond component. At the same time, Fe in the metal coordination component 3+ can form a metal coordination bond with -OH in the solvent component, -COOH in the hydrogen bond component or both. Finally, under the action of the initiator component, acrylic acid in the hydrogen bond component polymerizes into a long - chain polymer, making the solvent component, hydrogen bond component and metal coordination component cross - link with each other to form a supramolecular interaction, and further obtaining a bionic high - adhesion asphalt modifier, which neither affects the various properties and normal use functions of the road, and at the same time has high - adhesion characteristics similar to mussels.

[0021] The beneficial effects of the present invention are as follows:

[0022] 1. The high - adhesion asphalt modifier provided by the present invention is based on the supramolecular interaction composed of reversible intermolecular interactions, imitates the adhesion mechanism of aquatic organisms mussels, and provides a bionic high - adhesion asphalt modifier including a solvent component, a hydrogen bond component, a metal coordination component and an initiator component. Using this bionic high - adhesion asphalt modifier, a bionic high - adhesion asphalt material can be prepared, which neither affects the various properties and normal use functions of the road, nor fully realizes the high - adhesion characteristics of the asphalt material.

[0023] 2. The present invention uses unsaturated acid small molecules as raw materials. After initially forming cross-linking bonds and then initiating cross-linking to form supramolecular interactions, it helps to improve the coordination bond degree of the modifier, thereby enhancing the adhesion. Meanwhile, it can also reduce the usage amount of the modifier while ensuring the same adhesion effect, thus reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 It is the result of the adhesion force of the bionic highly adhesive asphalt. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] To make the objectives, technical solutions, and advantages of the present invention clearer, the following clearly and completely describes the technical solutions in the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0027] Example 1

[0028] This example provides a bionic highly adhesive asphalt modifier, which includes a solvent component, a hydrogen bond component, a metal coordination component, and an initiator component.

[0029] In the bionic highly adhesive asphalt modifier of this example, the volume percentage of the solvent component is 48%, the volume percentage of the hydrogen bond component is 37%, the volume percentage of the metal coordination component is 8%, and the volume percentage of the initiator component is 7%.

[0030] The mass percentages of the substances in the solvent component are: glacial acetic acid 3%, chitosan 5%, and distilled water 92%.

[0031] The mass percentages of the substances in the metal coordination component are: ferric chloride hexahydrate 3%, and distilled water 97%.

[0032] The mass percentages of the substances in the initiator component are: potassium persulfate 5%, and distilled water 95%.

[0033] This example also provides a preparation method for the bionic highly adhesive asphalt modifier, including:

[0034] (1) Weigh the solvent component and the hydrogen bond component in a certain proportion, and mix them at 20 °C and 860 revolutions per minute for 75 minutes;

[0035] (2) Weigh a certain proportion of the metal coordination component and add it, and mix it at 22 °C and 880 revolutions per minute for 20 minutes;

[0036] (3) Weigh a certain proportion of the initiator component and add it, and mix it at 23 °C and 920 revolutions per minute for 78 minutes.

[0037] Example 2

[0038] This example provides a bionic high-adhesion asphalt modifier, including a solvent component, a hydrogen bond component, a metal coordination component, and an initiator component.

[0039] In the bionic high-adhesion asphalt modifier of this example, the volume percentage of the solvent component is 53%, the volume percentage of the hydrogen bond component is 35%, the volume percentage of the metal coordination component is 7%, and the volume percentage of the initiator component is 5%.

[0040] The mass percentages of the substances in the solvent component are: glacial acetic acid 3.3%, chitosan 6%, and distilled water 90.7%.

[0041] The mass percentages of the substances in the metal coordination component are: ferric chloride hexahydrate 2.5%, and distilled water 97.5%.

[0042] The mass percentages of the substances in the initiator component are: potassium persulfate 6%, and distilled water 94%.

[0043] This example also provides a preparation method of a bionic high-adhesion asphalt modifier, including:

[0044] (1) Weigh the solvent component and the hydrogen bond component in a certain proportion, and mix them at 25 °C and 920 revolutions per minute for 85 minutes;

[0045] (2) Weigh a certain proportion of the metal coordination component and add it, and mix it at 20 °C and 850 revolutions per minute for 18 minutes;

[0046] (3) Weigh a certain proportion of the initiator component and add it, and mix it at 22 °C and 900 revolutions per minute for 85 minutes.

[0047] Example 3

[0048] This example provides a bionic high-adhesion asphalt modifier, including a solvent component, a hydrogen bond component, a metal coordination component, and an initiator component.

[0049] In the bionic high-adhesion asphalt modifier of this embodiment, the volume percentage of the solvent component is 55%, the volume percentage of the hydrogen-bond component is 33%, the volume percentage of the metal coordination component is 6%, and the volume percentage of the initiator component is 6%.

[0050] The mass percentages of the substances in the solvent component are: glacial acetic acid 2%, chitosan 6%, and distilled water 92%.

[0051] The mass percentages of the substances in the metal coordination component are: ferric chloride hexahydrate 2%, and distilled water 98%.

[0052] The mass percentages of the substances in the initiator component are: potassium persulfate 5.5%, and distilled water 95.5%.

[0053] This embodiment also provides a preparation method of the bionic high-adhesion asphalt modifier, including:

[0054] (1) Weigh the solvent component and the hydrogen-bond component according to a certain ratio, and mix them at 24 °C and 900 revolutions per minute for 80 minutes;

[0055] (2) Weigh a certain proportion of the metal coordination component and add it, and mix it at 20 °C and 910 revolutions per minute for 20 minutes;

[0056] (3) Weigh a certain proportion of the initiator component and add it, and mix it at 20 °C and 890 revolutions per minute for 80 minutes.

[0057] Example 4

[0058] This embodiment provides a bionic high-adhesion asphalt modifier, including a solvent component, a hydrogen-bond component, a metal coordination component, and an initiator component.

[0059] In the bionic high-adhesion asphalt modifier of this embodiment, the volume percentage of the solvent component is 61%, the volume percentage of the hydrogen-bond component is 30%, the volume percentage of the metal coordination component is 5%, and the volume percentage of the initiator component is 4%.

[0060] The mass percentages of the substances in the solvent component are: glacial acetic acid 3%, chitosan 4%, and distilled water 93%.

[0061] The mass percentages of the substances in the metal coordination component are: ferric chloride hexahydrate 2%, and distilled water 98%.

[0062] The mass percentages of the substances in the initiator component are: potassium persulfate 6%, and distilled water 94%.

[0063] This embodiment also provides a preparation method of the bionic high-adhesion asphalt modifier, including:

[0064] (1) Weigh the solvent component and the hydrogen bond component according to a certain ratio, and mix them at 19 °C and 930 revolutions per minute for 83 minutes;

[0065] (2) Weigh a certain proportion of the metal coordination component and add it, and mix it at 20 °C and 950 revolutions per minute for 17 minutes;

[0066] (3) Weigh a certain proportion of the initiator component and add it, and mix it at 18 °C and 900 revolutions per minute for 83 minutes.

[0067] Example 5

[0068] This example provides a bionic high-adhesion asphalt material, including matrix asphalt and a bionic high-adhesion asphalt modifier.

[0069] Among them, the mass percentage of the matrix asphalt is 99%, and the mass percentage of the bionic high-adhesion asphalt modifier is 1%.

[0070] In the bionic high-adhesion asphalt modifier of this example, the volume percentage of the solvent component is 48%, the volume percentage of the hydrogen bond component is 37%, the volume percentage of the metal coordination component is 8%, and the volume percentage of the initiator component is 7%.

[0071] The mass percentages of the substances in the solvent component are: glacial acetic acid 3%, chitosan 5%, and distilled water 92%.

[0072] The mass percentages of the substances in the metal coordination component are: ferric chloride hexahydrate 3%, and distilled water 97%.

[0073] The mass percentages of the substances in the initiator component are: potassium persulfate 5%, and distilled water 95%.

[0074] Taking the preparation of 1000 g of bionic high-adhesion asphalt as an example, 990 g of matrix asphalt is required, and 10 g of bionic high-adhesion asphalt modifier needs to be prepared.

[0075] This example also provides a preparation method of the above bionic high-adhesion asphalt material, as follows:

[0076] (1) Heat the matrix asphalt to the mixing temperature;

[0077] (2) Add the bionic high-adhesion asphalt modifier to the matrix asphalt that has been heated to the mixing temperature and mix.

[0078] Among them, the mixing temperature of the matrix asphalt and the bionic high-adhesion asphalt modifier is 140 °C, and the mixing conditions are to mix at 4500 revolutions per minute for 45 minutes first, and then mix at 1200 revolutions per minute for 12 minutes.

[0079] Among them, the preparation method of the bionic high-adhesion asphalt modifier includes:

[0080] (1) Weigh the solvent component and the hydrogen bond component in a certain proportion, and mix them at 20 °C and 860 revolutions per minute for 75 minutes;

[0081] (2) Weigh a certain proportion of the metal coordination component and add it, and mix it at 22 °C and 880 revolutions per minute for 20 minutes;

[0082] (3) Weigh a certain proportion of the initiator component and add it, and mix it at 23 °C and 920 revolutions per minute for 78 minutes.

[0083] Example 6

[0084] This example provides a bionic highly adhesive asphalt material, including matrix asphalt and a bionic highly adhesive asphalt modifier.

[0085] Among them, the mass percentage of the matrix asphalt is 98%, and the mass percentage of the bionic highly adhesive asphalt modifier is 2%.

[0086] In the bionic highly adhesive asphalt modifier of this example, the volume percentage of the solvent component is 53%, the volume percentage of the hydrogen bond component is 35%, the volume percentage of the metal coordination component is 7%, and the volume percentage of the initiator component is 5%.

[0087] The mass percentages of the substances in the solvent component are: glacial acetic acid 3.3%, chitosan 6%, and distilled water 90.7%.

[0088] The mass percentages of the substances in the metal coordination component are: ferric chloride hexahydrate 2.5%, and distilled water 97.5%.

[0089] The mass percentages of the substances in the initiator component are: potassium persulfate 6%, and distilled water 94%.

[0090] Taking the preparation of 1000 g of bionic highly adhesive asphalt as an example, 980 g of matrix asphalt is required, and 20 g of bionic highly adhesive asphalt modifier needs to be prepared.

[0091] This example also provides a preparation method of the above bionic highly adhesive asphalt material, as follows:

[0092] (1) Heat the matrix asphalt to the mixing temperature;

[0093] (2) Add the bionic highly adhesive asphalt modifier to the matrix asphalt that has been heated to the mixing temperature and mix.

[0094] Among them, the mixing temperature of the matrix asphalt and the bionic highly adhesive asphalt modifier is 138 °C, and the mixing conditions are to mix at 4200 revolutions per minute for 42 minutes first, and then mix at 1100 revolutions per minute for 11 minutes.

[0095] Among them, the preparation method of the bionic high-adhesion asphalt modifier includes:

[0096] (1) Weigh the solvent component and the hydrogen bond component in a certain proportion, and mix them at 25°C and 920 revolutions per minute for 85 minutes;

[0097] (2) Weigh a certain proportion of the metal coordination component and add it, and mix it at 20°C and 850 revolutions per minute for 18 minutes;

[0098] (3) Weigh a certain proportion of the initiator component and add it, and mix it at 22°C and 900 revolutions per minute for 85 minutes.

[0099] Example 7

[0100] This example provides a bionic high-adhesion asphalt material, including matrix asphalt and a bionic high-adhesion asphalt modifier.

[0101] Among them, the mass percentage of the matrix asphalt is 96%, and the mass percentage of the bionic high-adhesion asphalt modifier is 4%.

[0102] In the bionic high-adhesion asphalt modifier of this example, the volume percentage of the solvent component is 55%, the volume percentage of the hydrogen bond component is 33%, the volume percentage of the metal coordination component is 6%, and the volume percentage of the initiator component is 6%.

[0103] The mass percentages of the substances in the solvent component are: glacial acetic acid 2%, chitosan 6%, and distilled water 92%.

[0104] The mass percentages of the substances in the metal coordination component are: ferric chloride hexahydrate 2%, and distilled water 98%.

[0105] The mass percentages of the substances in the initiator component are: potassium persulfate 5.5%, and distilled water 95.5%.

[0106] Taking the preparation of 1000 g of bionic high-adhesion asphalt as an example, 960 g of matrix asphalt is required, and 40 g of bionic high-adhesion asphalt modifier needs to be prepared.

[0107] This example also provides the preparation method of the above bionic high-adhesion asphalt material, as follows:

[0108] (1) Heat the matrix asphalt to the mixing temperature;

[0109] (2) Add the bionic high-adhesion asphalt modifier to the matrix asphalt that has been heated to the mixing temperature and mix.

[0110] Among them, the mixing temperature of the matrix asphalt and the bionic high-adhesion asphalt modifier is 135°C. The mixing conditions are as follows: first, mix at 4400 revolutions per minute for 44 minutes, and then mix at 1300 revolutions per minute for 13 minutes.

[0111] Among them, the preparation method of the bionic high-adhesion asphalt modifier includes:

[0112] (1) Weigh the solvent component and the hydrogen bond component in a certain proportion, and mix them at 24°C and 900 revolutions per minute for 80 minutes;

[0113] (2) Weigh a certain proportion of the metal coordination component and add it, and mix at 20°C and 910 revolutions per minute for 20 minutes;

[0114] (3) Weigh a certain proportion of the initiator component and add it, and mix at 20°C and 890 revolutions per minute for 80 minutes.

[0115] Example 8

[0116] This example provides a bionic high-adhesion asphalt material, including matrix asphalt and a bionic high-adhesion asphalt modifier.

[0117] Among them, the mass percentage of the matrix asphalt is 92%, and the mass percentage of the bionic high-adhesion asphalt modifier is 8%.

[0118] In the bionic high-adhesion asphalt modifier of this example, the volume percentage of the solvent component is 61%, the volume percentage of the hydrogen bond component is 30%, the volume percentage of the metal coordination component is 5%, and the volume percentage of the initiator component is 4%.

[0119] The mass percentages of the substances in the solvent component are: glacial acetic acid 3%, chitosan 4%, and distilled water 93%.

[0120] The mass percentages of the substances in the metal coordination component are: ferric chloride hexahydrate 2%, and distilled water 98%.

[0121] The mass percentages of the substances in the initiator component are: potassium persulfate 6%, and distilled water 94%.

[0122] Taking the preparation of 1000 g of bionic high-adhesion asphalt as an example, 920 g of matrix asphalt is required, and 80 g of bionic high-adhesion asphalt modifier needs to be prepared.

[0123] This example also provides the preparation method of the above bionic high-adhesion asphalt material, as follows:

[0124] (1) Heat the matrix asphalt to the mixing temperature;

[0125] (2) Add the bionic high-adhesion asphalt modifier to the matrix asphalt that has been heated to the mixing temperature and mix.

[0126] Among them, the mixing temperature of the matrix asphalt and the bionic high-adhesion asphalt modifier is 138 °C, and the mixing conditions are first mixing for 43 minutes at 4300 revolutions per minute, and then mixing for 10 minutes at 1000 revolutions per minute.

[0127] Among them, the preparation method of the bionic high-adhesion asphalt modifier includes:

[0128] (1) Weigh the solvent component and the hydrogen bond component according to a certain ratio, and mix them at 19 °C and 930 revolutions per minute for 83 minutes;

[0129] (2) Weigh a certain proportion of the metal coordination component and add it, and mix it at 20 °C and 950 revolutions per minute for 17 minutes;

[0130] (3) Weigh a certain proportion of the initiator component and add it, and mix it at 18 °C and 900 revolutions per minute for 83 minutes.

[0131] Comparative Example 1

[0132] This example provides a bionic high-adhesion asphalt material, including matrix asphalt and acrylic acid.

[0133] Among them, the mass percentage of the matrix asphalt is 99%, and the mass percentage of the acrylic acid is 1%.

[0134] This example also provides the preparation method of the above-mentioned bionic high-adhesion asphalt material, as follows:

[0135] (1) Heat the matrix asphalt to the mixing temperature;

[0136] (2) Add the acrylic acid to the matrix asphalt that has been heated to the mixing temperature and mix it.

[0137] Among them, the mixing temperature of the matrix asphalt and the acrylic acid is 140 °C, and the mixing conditions are first mixing for 45 minutes at 4500 revolutions per minute, and then mixing for 12 minutes at 1200 revolutions per minute.

[0138] Comparative Example 2

[0139] This example provides a bionic high-adhesion asphalt material, including matrix asphalt and acrylic acid.

[0140] Among them, the mass percentage of the matrix asphalt is 98%, and the mass percentage of the acrylic acid is 2%.

[0141] This example also provides the preparation method of the above-mentioned bionic high-adhesion asphalt material, as follows:

[0142] (1) Heat the matrix asphalt to the mixing temperature;

[0143] (2) Add acrylic acid to the base asphalt that has been heated to the mixing temperature and mix.

[0144] The mixing temperature of the base asphalt and acrylic acid is 138 °C. The mixing conditions are to mix for 42 minutes at 4200 revolutions per minute first, and then mix for 11 minutes at 1100 revolutions per minute.

[0145] Comparative Example 3

[0146] Same as Example 5, except that the bionic high-adhesion asphalt modifier does not contain a solvent component and a metal coordination component.

[0147] Comparative Example 4

[0148] Same as Example 6, except that the bionic high-adhesion asphalt modifier does not contain an added solvent component and a metal coordination component.

[0149] Comparative Example 5

[0150] Same as Example 7, except that the bionic high-adhesion asphalt modifier does not contain an initiator component.

[0151] Comparative Example 6

[0152] Same as Example 8, except that the bionic high-adhesion asphalt modifier does not contain an initiator component.

[0153] Test Example

[0154] Characterize the adhesion properties of the bionic high-adhesion asphalt prepared in Examples 5-8. Use an atomic force microscope to perform a force curve test at 20 μm × 20 μm, and further obtain the adhesion property parameters of the asphalt material. The adhesion force results are as Figure 1 shown. The key adhesion force parameters are shown in Table 1. The greater the adhesion force, the stronger the adhesion ability of the asphalt material.

[0155] Comparative Test Example

[0156] Characterize the adhesion properties of the bionic high-adhesion asphalt prepared in Comparative Examples 1-6. Use an atomic force microscope to perform a force curve test at 20 μm × 20 μm, and further obtain the adhesion property parameters of the asphalt material. The adhesion force results are as Figure 1 shown. The key adhesion force parameters are shown in Table 1. The greater the adhesion force, the stronger the adhesion ability of the asphalt material.

[0157] Table 1 Adhesion Force Test Results of Examples and Comparative Examples

[0158]

[0159]

[0160] From Figure 1 Table 1, it can be seen that the bionic highly adhesive asphalt has excellent adhesion characteristics, far exceeding those of the matrix asphalt. The increase in the average adhesion force ranges from 299.50% to 360.89%, and the increase in the median adhesion force ranges from 297.10% to 364.73%. The differences between the comparative examples and the examples are significant, indicating that it is impossible to prepare bionic highly adhesive asphalt by adding only a certain component or adding less of a certain component.

[0161] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A preparation method of a modified asphalt material, characterized in that, Comprising: Heat the asphalt matrix to 130 - 140 °C, then add the high - adhesion asphalt modifier, first mix at 4000 - 4500 revolutions per minute for 30 - 50 minutes, and then mix at 1000 - 1500 revolutions per minute for 8 - 15 minutes to obtain; The high - adhesion asphalt modifier, by volume fraction, comprises: 45 - 65 parts of a solvent component, 27 - 40 parts of a hydrogen - bond component, 4 - 8 parts of a metal - coordination component, and 4 - 8 parts of an initiator component; The solvent component and the hydrogen - bond component respectively contain at least one of a hydroxyl group and a carboxyl group, and the hydrogen - bond component also contains a carbon - carbon double bond; the initiator is a free - radical initiator; The preparation method of the high - adhesion asphalt modifier comprises: Prepare the above - mentioned solvent component, hydrogen - bond component, metal - coordination component, and initiator component at 18 - 25 °C, and successively mix the above - mentioned solvent component, hydrogen - bond component, metal - coordination component, and initiator component at the same temperature and under the condition of 850 - 950 revolutions per minute for 70 - 90 minutes, 15 - 25 minutes, and 70 - 90 minutes to obtain; The solvent component includes a chitosan aqueous solution; The chitosan aqueous solution includes glacial acetic acid, chitosan, and distilled water with a mass ratio of 2.5 - 3.5:4 - 6:90 - 94; The hydrogen - bond component includes acrylic acid or its derivatives; The metal - coordination component includes ferric chloride hexahydrate and distilled water with a mass ratio of 2 - 3:97 - 98.

2. The preparation method of the modified asphalt material according to claim 1, characterized in that The degree of deacetylation of the chitosan is greater than or equal to 95%.

3. The preparation method of the modified asphalt material according to claim 1, characterized in that, The initiator component includes a potassium persulfate solution, a sodium persulfate solution, or an ammonium persulfate solution.

4. The preparation method of the modified asphalt material according to claim 3, wherein The initiator component includes potassium persulfate and distilled water with a mass ratio of 5 - 6:94 - 95.

5. The preparation method of the modified asphalt material according to any one of claims 1-4, characterized in that, By volume fraction, the high - adhesion asphalt modifier comprises: 50 - 60 parts of a solvent component, 30 - 35 parts of a hydrogen - bond component, 5 - 7 parts of a metal - coordination component, and 5 - 7 parts of an initiator component.

6. The preparation method of the modified asphalt material according to claim 1, characterized in that, The mass content of the high - adhesion asphalt modifier in the modified asphalt material is 1 - 10%.

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