Asphalt anti-stripping agent and preparation method thereof, anti-stripping asphalt and preparation method thereof
By preparing an asphalt anti-stripping agent containing phosphate esters, naphthalene aromatics and polyphosphoric acid, the problem of poor adhesion of asphalt concrete in acidic aggregates is solved, the thermal stability and durability are improved, and the service life is extended.
Patent Information
- Application Number
- CN202510989136.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-17
- Publication Date
- 2025-09-16
AI Technical Summary
Existing asphalt concrete has poor adhesion to acidic aggregates, which easily leads to water damage and spalling. In addition, organic anti-stripping agents are easily volatilized at high temperatures, affecting thermal stability and durability.
Asphalt anti-stripping agents are prepared using phosphate esters, naphthalene aromatics and polyphosphoric acids, which improve the adhesion between asphalt and aggregate through chemical adsorption and alkylation reactions, and enhance the thermal stability and durability of asphalt.
It significantly enhances the adhesion between asphalt and acidic aggregate, improves the thermal stability and durability of asphalt concrete, and extends its service life.
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Figure CN120648033A_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of material manufacturing, and in particular to a method for preparing an asphalt anti-stripping agent, an asphalt anti-stripping agent, a method for preparing an anti-stripping asphalt, and anti-stripping asphalt. Background Art
[0002] With the expansion of water conservancy project construction, acidic materials are sometimes required as aggregates for asphalt concrete, especially in areas with widespread acidic rock. However, the surface of acidic aggregates, rich in hydrophilic minerals such as SiO2, results in low surface energy and negative charge, leading to poor adhesion to asphalt. Furthermore, the long-term exposure of water conservancy projects to water environments and loads can easily lead to water damage and spalling of asphalt concrete, compromising the service life and safety of the structures.
[0003] At present, organic anti-stripping agents are commonly added to asphalt concrete. The polar group at one end of its molecular structure adsorbs on the acidic aggregate, and the non-polar group at the other end combines with the asphalt, connecting the asphalt and the acidic aggregate to improve the interfacial adhesion performance, thereby achieving the effect of anti-stripping and anti-water damage.
[0004] However, some components of organic anti-stripping agents are prone to volatilization or decomposition under high-temperature construction conditions, which not only reduces the modification effect but also affects the thermal stability and durability of asphalt concrete.
[0005] The above information disclosed in this Background section is only for enhancement of understanding of the background of the present disclosure and therefore it may contain information that does not form the prior art that is already known to a person of ordinary skill in the art. Summary of the Invention
[0006] The purpose of the present disclosure is to provide a method for preparing an asphalt anti-stripping agent, an asphalt anti-stripping agent, a method for preparing anti-stripping asphalt, and anti-stripping asphalt, which can effectively improve the adhesion between the base asphalt and the aggregate, and improve the thermal stability and durability of asphalt concrete.
[0007] To achieve the above-mentioned purpose, the present invention adopts the following technical solutions:
[0008] According to the first aspect of the present disclosure, a method for preparing an asphalt anti-stripping agent is provided, which may include: adding a phosphate substance and a naphthalene aromatic hydrocarbon substance to a reactor and stirring evenly; adding a polyphosphoric acid substance and a solvent in sequence and stirring to obtain a completely dissolved mixture; homogenizing the mixture to obtain an asphalt anti-stripping agent; wherein, with 1 equivalent as 1 part, the addition ratio of the phosphate substance includes 40 parts to 70 parts, the addition ratio of the naphthalene aromatic hydrocarbon substance includes 20 parts to 35 parts, the addition ratio of the polyphosphoric acid substance includes 10 parts to 25 parts, and the addition ratio of the solvent includes 5 parts to 10 parts.
[0009] Optionally, the phosphate ester substance includes at least one of phosphate ester and phosphate diester.
[0010] Optionally, the naphthalene-based aromatic hydrocarbon substance includes at least one of naphthalene, methylnaphthalene, and dimethylnaphthalene.
[0011] Optionally, the polyphosphate species includes pyrophosphate.
[0012] Optionally, the solvent comprises xylene.
[0013] According to the second aspect of the present disclosure, a method for preparing anti-stripping asphalt is provided, which may include: heating the base asphalt to 150°C to 160°C and adding an asphalt anti-stripping agent; the asphalt anti-stripping agent is prepared using the method of the first aspect described above; and stirring the base asphalt to which the asphalt anti-stripping agent is added at a rotation speed of 1000 to 2000 revolutions per minute to obtain the anti-stripping asphalt.
[0014] Optionally, the addition amount of the asphalt anti-stripping agent is comprised between 0.1% and 1.0%.
[0015] Optionally, the stirring time for stirring the base asphalt to which the asphalt anti-stripping agent is added is determined according to the mass of the base asphalt and is greater than or equal to 20 minutes.
[0016] According to a third aspect of the present disclosure, there is provided an asphalt anti-stripping agent, which is prepared by the asphalt anti-stripping agent preparation method of the first aspect.
[0017] According to a fourth aspect of the present disclosure, there is provided an anti-stripping asphalt prepared by the anti-stripping asphalt preparation method of the second aspect.
[0018] The present disclosure provides a method for preparing an asphalt anti-stripping agent, wherein the asphalt anti-stripping agent is prepared by mixing phosphate esters, naphthalene aromatic hydrocarbons and polyphosphoric acid substances; with 1 equivalent being 1 part, the addition ratio of the phosphate esters includes 40 to 70 parts, the addition ratio of the naphthalene aromatic hydrocarbons includes 20 to 35 parts, the addition ratio of the polyphosphoric acid substances includes 10 to 25 parts, and the addition ratio of the solvent includes 5 to 10 parts. Among them, the strong polar groups of phosphate esters can chemically adsorb with the mineral components on the aggregate surface, thereby improving the adhesion of asphalt to aggregate, especially with acidic aggregates. In addition, mixed naphthalene aromatic hydrocarbons are compatible with the aromatic components in asphalt, further improving the adhesion of asphalt to aggregate. Under certain conditions, they can also undergo alkylation reactions with small unsaturated hydrocarbon molecules in asphalt to form a colloidal structure to enhance the stability of asphalt. On this basis, polyphosphoric acid substances can react with small molecules in asphalt to increase the viscosity of asphalt, thereby improving the thermal stability and aging performance of asphalt. At the same time, the polar phosphate groups can also chemically adsorb with the mineral components on the aggregate surface, also enhancing the adhesion of asphalt to aggregate. Therefore, under the combined action of phosphate esters, naphthalene aromatic hydrocarbons, and polyphosphoric acid substances, the asphalt anti-stripping agent achieves the effect of improving the adhesion of asphalt to aggregate and improving the thermal stability and durability of asphalt concrete through the synergistic properties of different components, which can effectively extend the service life of asphalt under harsh water environments and loads.
[0019] The present disclosure provides a method for preparing anti-stripping asphalt, and an anti-stripping asphalt, wherein the anti-stripping asphalt is prepared by mixing base asphalt with an asphalt anti-stripping agent prepared by the aforementioned asphalt anti-stripping agent preparation method. The strong polar groups of the phosphate ester substances in the asphalt anti-stripping agent can undergo chemical adsorption with the mineral components on the surface of the aggregate, thereby improving the adhesion between the asphalt and the aggregate, especially having a significant adhesion enhancement effect on acidic aggregates; and mixed naphthalene aromatic hydrocarbon substances can be compatible with the aromatic components in the asphalt, further improving the adhesion between the asphalt and the aggregate, and can also undergo alkylation reaction with the unsaturated hydrocarbon small molecules in the asphalt under certain conditions to form a colloidal structure to enhance the stability of the asphalt; on this basis, polyphosphoric acid substances can react with small molecules in the asphalt, thereby increasing the viscosity of the asphalt, thereby improving the thermal stability and aging performance of the asphalt, and at the same time, the polar phosphate groups can also undergo chemical adsorption with the mineral components on the surface of the aggregate, which can also enhance the adhesion between the asphalt and the aggregate. Therefore, under the combined action of phosphate esters, naphthalene aromatic hydrocarbons, and polyphosphoric acid substances, the asphalt anti-stripping agent improves the adhesion between asphalt and aggregate in the anti-stripping asphalt through the synergistic properties of different components, improves thermal stability and durability, and effectively extends the service life of the anti-stripping asphalt under harsh water environments and loads. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0021] Figure 1 A flow chart showing the steps of a method for preparing an asphalt anti-stripping agent according to an embodiment of the present disclosure is shown.
[0022] Figure 2 A flow chart showing the steps of the method for preparing anti-stripping asphalt in an embodiment of the present disclosure is shown. DETAILED DESCRIPTION
[0023] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be more comprehensive and complete and will fully convey the concepts of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure.
[0024] However, those skilled in the art will appreciate that the technical solutions of the present disclosure can be practiced without one or more of the specific details, or can adopt other methods, components, materials, etc. In other cases, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring the main technical ideas of the present disclosure.
[0025] When a structure is “on” another structure, it may mean that the structure is integrally formed on the other structure, or that the structure is “directly” disposed on the other structure, or that the structure is “indirectly” disposed on the other structure via another structure.
[0026] The terms "a," "an," and "the" are used to indicate the presence of one or more elements / components; the terms "including" and "having" are used to indicate an open-ended inclusiveness and mean that additional elements / components / etc. may be present in addition to the listed elements / components / etc. The terms "first," "second," etc. are used merely as labels and do not limit the quantity of the items to which they refer.
[0027] Figure 1The flowchart of the steps of the method for preparing the asphalt anti-stripping agent in the embodiment of the present disclosure is shown as follows: Figure 1 As shown, the method may include steps 101 to 103. As shown below:
[0028] In step 101, phosphate esters and naphthalene aromatics are added to a reaction kettle and stirred evenly. In the disclosed embodiment, during the preparation of the asphalt anti-stripping agent, the phosphate esters and naphthalene aromatics are first added to the reactants and mixed and then stirred evenly.
[0029] Phosphate esters, typically ester derivatives of phosphoric acid, possess strong polar groups that chemically adsorb with mineral components on the aggregate surface, forming stable chemical bonds that significantly enhance the adhesion between asphalt and aggregate. Phosphate esters also have high boiling points and exhibit good thermal stability. When added to asphalt, they can effectively improve the high-temperature performance and durability of asphalt concrete.
[0030] Naphthalene aromatics generally refer to naphthalene rings and their derivatives. Among asphaltene, colloids, saturates, and aromatics, naphthalene aromatics have a molecular structure highly similar to the aromatics. Therefore, naphthalene aromatics have good compatibility with asphalt, effectively helping to improve the adhesion between asphalt and aggregate. Furthermore, under certain conditions, naphthalene aromatics can also undergo alkylation reactions with small unsaturated hydrocarbon molecules in asphalt, forming new colloidal structures within the asphalt and enhancing its thermal stability.
[0031] Adding phosphate esters and naphthalene aromatic hydrocarbons to asphalt anti-stripping agents can effectively enhance their effect on improving asphalt adhesion and thermal stability.
[0032] In an optional embodiment of the present disclosure, the phosphate ester substance includes at least one of phosphate ester and phosphate diester.
[0033] In the embodiments of the present disclosure, the phosphate ester substances may include phosphate esters, phosphate diesters, etc., and one or a combination of several can be selected according to the requirements for thermal stability. Among them, taking alkyl phosphate esters as an example, the boiling point of dodecyl phosphate at 760 mmHg (760 mmHg, 1 standard atmosphere) is 385.5°C, and the boiling point of dodecyl phosphate diester at 760 mmHg is 507.9°C. Those skilled in the art can select a specific phosphate substance according to the thermal stability requirements of the actual working conditions and the construction conditions, and the embodiments of the present disclosure do not impose specific restrictions on this.
[0034] In an optional embodiment of the present disclosure, the addition ratio of the phosphate ester substance ranges from 40 parts to 70 parts.
[0035] In the embodiments of the present disclosure, the phosphoric acid substance can be added in a ratio of 40 to 70 parts, with 1 equivalent being 1 part. For example, 40, 41, ..., 45, ..., 50, ..., 60, ..., or 70 parts of phosphoric acid substance can be added to the reactor, and those skilled in the art will not make specific limitations on this. In an optional embodiment of the present disclosure, the naphthalene-based aromatic hydrocarbon substance includes at least one of naphthalene, methylnaphthalene, and dimethylnaphthalene.
[0036] In the embodiment of the present disclosure, naphthalene-based aromatic hydrocarbon substances may include naphthalene, methylnaphthalene, dimethylnaphthalene, etc., and one or a combination of several substances may be selected according to the aromatic components in the asphalt.
[0037] In an optional embodiment of the present disclosure, the addition ratio of the naphthalene-based aromatic hydrocarbons includes 20 parts to 35 parts. In the embodiment of the present disclosure, with 1 equivalent being 1 part, the addition ratio of the naphthalene-based aromatic hydrocarbons can be any one of 20 parts to 35 parts. For example, 20 parts, 21 parts, ..., 25 parts, ..., 30 parts, ..., 35 parts of the naphthalene-based aromatic hydrocarbons can be added to the reactor, and those skilled in the art will not make specific limitations on this.
[0038] In step 102, polyphosphoric acid and solvent are added in sequence and stirred to obtain a completely dissolved mixture.
[0039] In the embodiment of the present disclosure, after the phosphate ester substance and the naphthalene aromatic hydrocarbon substance are evenly mixed, a polyphosphoric acid substance and a solvent may be added for mixing.
[0040] Polyphosphoric acid substances typically have high acidity and viscosity, reacting with small molecules in asphalt to increase asphalt viscosity and improve its high-temperature and aging properties. Furthermore, the polar phosphate groups can chemically react with mineral components on the aggregate surface, further enhancing the adhesion between asphalt and aggregate.
[0041] The solvent can adjust the viscosity of the asphalt anti-stripping agent, and the type of solvent can be selected according to the viscosity requirements of the asphalt anti-stripping agent.
[0042] In an optional embodiment of the present disclosure, the polyphosphate substance includes pyrophosphate.
[0043] In the embodiments of the present disclosure, pyrophosphoric acid can be selected as the polyphosphoric acid. Pyrophosphoric acid can promote the chemical reaction between aromatic components and colloids in asphalt, increase the asphaltene content, and enhance the stability of the colloidal structure, thereby enhancing the high-temperature performance and aging resistance of asphalt. Those skilled in the art may also select other polyphosphoric acid substances according to actual needs, and the embodiments of the present disclosure are not specifically limited in this regard.
[0044] In an optional embodiment of the present disclosure, the addition ratio of the polyphosphoric acid substance includes 10 parts to 25 parts. In the embodiment of the present disclosure, with 1 equivalent as 1 part, the addition ratio of the polyphosphoric acid substance can include any one of 10 parts to 25 parts. For example, 10 parts, 11 parts, ..., 15 parts, ..., 20 parts, ..., 25 parts of polyphosphoric acid substance can be added to the reactor, and those skilled in the art will not make specific limitations on this.
[0045] In an optional embodiment of the present disclosure, the solvent includes xylene.
[0046] In the embodiments of the present disclosure, xylene can be selected as the solvent. Xylene has a strong ability to dissolve asphalt, has a good viscosity adjustment effect, facilitates processing, and can effectively improve material uniformity. Those skilled in the art may also select another solvent, or several solvents containing xylene, or several solvents excluding xylene, for dissolution and viscosity adjustment according to actual needs. The embodiments of the present disclosure are not specifically limited in this regard.
[0047] In an optional embodiment of the present disclosure, the addition ratio of the solvent is 5 parts to 10 parts.
[0048] In the embodiments of the present disclosure, 1 equivalent is defined as 1 part, and the ratio of solvent addition can be any one of 5 parts to 10 parts. For example, 5 parts, 6 parts, 7 parts, ..., 10 parts of solvent can be added to the reactor, and those skilled in the art will not make specific limitations on this.
[0049] In step 103, the mixture is homogenized to obtain an asphalt anti-stripping agent.
[0050] In the embodiment of the present disclosure, based on the mixture obtained in the aforementioned step 102, the mixture can be homogenized, such as by high-speed shearing to fully homogenize the mixture, or those skilled in the art can also adopt other homogenization processes according to actual needs, and the embodiment of the present disclosure does not impose specific limitations on this.
[0051] The preparation method of asphalt anti-stripping agent provided by the present invention is prepared by mixing phosphate substances, naphthalene aromatic hydrocarbon substances and polyphosphoric acid substances; taking 1 equivalent as 1 part, the addition ratio of phosphate substances includes 40 parts to 70 parts, the addition ratio of naphthalene aromatic hydrocarbon substances includes 20 parts to 35 parts, the addition ratio of polyphosphoric acid substances includes 10 parts to 25 parts, and the addition ratio of solvent includes 5 parts to 10 parts. Among them, the strong polar groups of phosphate esters can chemically adsorb with the mineral components on the aggregate surface, thereby improving the adhesion of asphalt to aggregate, especially with acidic aggregates. In addition, mixed naphthalene aromatic hydrocarbons are compatible with the aromatic components in asphalt, further improving the adhesion of asphalt to aggregate. Under certain conditions, they can also undergo alkylation reactions with small unsaturated hydrocarbon molecules in asphalt to form a colloidal structure to enhance the stability of asphalt. On this basis, polyphosphoric acid substances can react with small molecules in asphalt to increase the viscosity of asphalt, thereby improving the thermal stability and aging performance of asphalt. At the same time, the polar phosphate groups can also chemically adsorb with the mineral components on the aggregate surface, also enhancing the adhesion of asphalt to aggregate. Therefore, under the combined action of phosphate esters, naphthalene aromatic hydrocarbons, and polyphosphoric acid substances, the asphalt anti-stripping agent achieves the effect of improving the adhesion of asphalt to aggregate and improving the thermal stability and durability of asphalt concrete through the synergistic properties of different components, which can effectively extend the service life of asphalt under harsh water environments and loads.
[0052] Figure 2 The flowchart of the method for preparing anti-stripping asphalt in the embodiment of the present disclosure is shown as follows: Figure 2 As shown, the method may include steps 201 to 202. As shown below:
[0053] In step 201, the base asphalt is heated to 150° C. to 160° C., and an asphalt anti-stripping agent is added; the asphalt anti-stripping agent is prepared using the above-mentioned asphalt anti-stripping agent preparation method.
[0054] In the disclosed embodiments, when preparing the anti-stripping asphalt, the base asphalt can be heated to 150°C to 160°C. For example, the base asphalt can be heated to 150°C, 151°C, ..., 155°C, ..., or 160°C, and this is not particularly limited by those skilled in the art. The base asphalt can be petroleum asphalt, natural asphalt, modified asphalt, and the like.
[0055] In the embodiment of the present disclosure, an asphalt anti-stripping agent can be added to the base asphalt after heating and softening. The asphalt anti-stripping agent is composed of the above Figure 1 The asphalt anti-stripping agent is prepared by the preparation method. For details, please refer to the above related descriptions, and to avoid repetition, they will not be described here.
[0056] In step 202, the base asphalt to which the asphalt anti-stripping agent is added is stirred at a rotation speed of 1000 to 2000 revolutions per minute to obtain anti-stripping asphalt.
[0057] In the embodiment of the present disclosure, after adding the asphalt anti-stripping agent to the heated and softened base asphalt, low-speed stirring can be performed at a rotation speed of 1000 to 2000 revolutions per minute to ensure that the base asphalt and the asphalt anti-stripping agent are fully and evenly mixed to obtain anti-stripping asphalt.
[0058] In an optional embodiment of the present disclosure, the addition amount of the asphalt anti-stripping agent ranges from 0.1% to 1.0%.
[0059] In the disclosed embodiments, the asphalt anti-stripping agent may be added in an amount ranging from 0.1% to 1.0%, representing the mass percentage of the asphalt anti-stripping agent relative to the total mass of the modified asphalt. For example, the asphalt anti-stripping agent may be added to the heated base asphalt in an amount of 0.1%, 0.2%, ..., 0.5%, ..., or 1.0%, and this is not particularly limited by those skilled in the art.
[0060] In an optional embodiment of the present disclosure, the stirring time for stirring the base asphalt to which the asphalt anti-stripping agent is added is determined according to the mass of the base asphalt and is greater than or equal to 20 minutes.
[0061] In the embodiment of the present disclosure, after adding the asphalt anti-stripping agent to the base asphalt after heating and softening, the stirring time can be determined according to the mass of the base asphalt. Generally, the greater the mass of the base asphalt, the longer the stirring time is to ensure sufficient uniformity. The specific relationship between the mass of the base asphalt and the stirring time can be set according to actual conditions and can be greater than or equal to 20 minutes. The embodiment of the present disclosure does not impose any specific restrictions on this.
[0062] The present disclosure provides a method for preparing anti-stripping asphalt, which is prepared by mixing base asphalt with an asphalt anti-stripping agent prepared by the aforementioned asphalt anti-stripping agent preparation method. The strong polar groups of the phosphate ester substances in the asphalt anti-stripping agent can undergo chemical adsorption with the mineral components on the aggregate surface, thereby improving the adhesion between the asphalt and the aggregate, especially having a significant adhesion enhancement effect on acidic aggregates; and mixed naphthalene aromatic hydrocarbon substances can be compatible with the aromatic components in the asphalt, further improving the adhesion between the asphalt and the aggregate, and can also undergo alkylation reactions with the unsaturated hydrocarbon small molecules in the asphalt under certain conditions to form a colloidal structure to enhance the stability of the asphalt; on this basis, polyphosphoric acid substances can react with small molecules in the asphalt, thereby increasing the viscosity of the asphalt to improve the thermal stability and aging performance of the asphalt. At the same time, the polar phosphate groups can also undergo chemical adsorption with the mineral components on the aggregate surface, which can also enhance the adhesion between the asphalt and the aggregate. Therefore, under the combined action of phosphate esters, naphthalene aromatic hydrocarbons, and polyphosphoric acid substances, the asphalt anti-stripping agent improves the adhesion between asphalt and aggregate in the anti-stripping asphalt through the synergistic properties of different components, improves thermal stability and durability, and effectively extends the service life of the anti-stripping asphalt under harsh water environments and loads.
[0063] The present disclosure also provides an asphalt anti-stripping agent, which is prepared by the above-mentioned asphalt anti-stripping agent preparation method. For details, please refer to the relevant description of the above-mentioned asphalt anti-stripping agent preparation method, and to avoid repetition, it will not be repeated here.
[0064] The present disclosure also provides an anti-stripping asphalt, which is prepared by the aforementioned anti-stripping asphalt preparation method. For details, please refer to the relevant description of the aforementioned anti-stripping asphalt preparation method. To avoid repetition, it will not be repeated here. For example, the present disclosure conducted a comparative test on the time when asphalt starts to peel and the aging index, and the test asphalt was added with asphalt anti-stripping agent A, asphalt anti-stripping agent B and conventional anti-stripping agent C respectively. Among them, asphalt anti-stripping agent A adopts 55 parts of dodecyl phosphate diester, 30 parts of naphthalene aromatic hydrocarbons, 15 parts of polyphosphoric acid substances, and 5 parts of solvent, and is prepared by the aforementioned asphalt anti-stripping preparation method. Asphalt anti-stripping agent B adopts 55 parts of dodecyl phosphate diester, 20 parts of naphthalene aromatic hydrocarbons, 15 parts of polyphosphoric acid substances, and 5 parts of solvent, and is prepared by the aforementioned asphalt anti-stripping agent preparation method.
[0065] Conventional anti-stripping agent C is a commercially available amine anti-stripping agent. As a control group, its recommended addition amount is 0.6%. Based on this, Hydraulic Engineering No. 70 asphalt was selected as the base asphalt, and asphalt anti-stripping agent A, asphalt anti-stripping agent B, and conventional anti-stripping agent C were added, respectively. Asphalt anti-stripping agent A was added at 0.3%, 0.4%, and 0.5%, asphalt anti-stripping agent B was added at 0.3%, 0.4%, and 0.5%, and asphalt anti-stripping agent C was added at 0.6%. The test results are shown in Table 1 below:
[0066] Table 1 Asphalt peeling start time and aging index
[0067]
[0068]
[0069] Table 1 shows that when using the same asphalt anti-stripping agent, the onset of spalling gradually increases with increasing addition levels of Asphalt Anti-stripping Agents A and B. At the same addition level, Asphalt Anti-stripping Agent A exhibits a relatively later onset of spalling, indicating better adhesion to the aggregate. Furthermore, Asphalt Anti-stripping Agent A exhibits a relatively higher penetration ratio and a relatively lower softening point increase, indicating superior thermal stability.
[0070] In addition, compared with asphalt anti-stripping agent C, asphalt anti-stripping agents A and B have better performance in local or all indicators when the addition amount is relatively lower.
[0071] Therefore, compared with amine anti-stripping agents, the addition of phosphates, naphthalene aromatics and polyphosphates significantly improves the adhesion between asphalt and aggregate, and improves the thermal stability of asphalt. It should be noted that although the various steps of the method in the present disclosure are described in a specific order in the accompanying drawings, this does not require or imply that these steps must be performed in this specific order, or that all the steps shown must be performed to achieve the desired results. Additionally or alternatively, certain steps may be omitted, multiple steps may be combined into one step, and / or one step may be decomposed into multiple steps, etc., which should all be considered part of the present disclosure.
[0072] It should be understood that the present disclosure is not limited in its application to the detailed structure and arrangement of the components proposed in this specification. The present disclosure is capable of other embodiments and can be implemented and executed in a variety of ways. The aforementioned variations and modifications fall within the scope of the present disclosure. It should be understood that the present disclosure disclosed and defined in this specification extends to all alternative combinations of two or more individual features mentioned or evident in the text and / or the drawings. All of these different combinations constitute multiple alternative aspects of the present disclosure. The embodiments of this specification illustrate the best mode known for implementing the present disclosure and will enable those skilled in the art to utilize the present disclosure.
Claims
1. A method for preparing an asphalt anti-stripping agent, characterized in that: The method comprises: Add phosphate substances and naphthalene aromatic substances into the reaction kettle and stir evenly; Add polyphosphoric acid and solvent in sequence, stirring to obtain a completely dissolved mixture; homogenizing the mixture to obtain an asphalt anti-stripping agent; Among them, with 1 equivalent as 1 part, the addition ratio of the phosphate substance includes 40 parts to 70 parts, the addition ratio of the naphthalene aromatic hydrocarbon substance includes 20 parts to 35 parts, the addition ratio of the polyphosphoric acid substance includes 10 parts to 25 parts, and the addition ratio of the solvent includes 5 parts to 10 parts.
2. The method according to claim 1, characterized in that The phosphate ester substance includes at least one of phosphate ester and phosphate diester.
3. The method according to claim 1, characterized in that The naphthalene series aromatic hydrocarbon substances include at least one of naphthalene, methylnaphthalene and dimethylnaphthalene.
4. The method according to claim 1, wherein The polyphosphate substances include pyrophosphate.
5. The method according to claim 1, wherein The solvent includes xylene.
6. A method for preparing anti-stripping asphalt, characterized in that: The method comprises: The base asphalt is heated to 150° C. to 160° C., and an asphalt anti-stripping agent is added; the asphalt anti-stripping agent is prepared by the method according to any one of claims 1 to 5; The base asphalt to which the asphalt anti-stripping agent is added is stirred at a rotation speed of 1000 to 2000 revolutions per minute to obtain anti-stripping asphalt.
7. The method according to claim 6, characterized in that The addition amount of the asphalt anti-stripping agent ranges from 0.1% to 1.0%.
8. The method according to claim 6 or 7, characterized in that The stirring time for stirring the base asphalt to which the asphalt anti-stripping agent is added is determined according to the mass of the base asphalt and is greater than or equal to 20 minutes.
9. An asphalt anti-stripping agent, characterized in that: The asphalt anti-stripping agent is prepared by the method described in any one of claims 1 to 5. 10.An anti-stripping asphalt, characterized in that: The anti-stripping asphalt is prepared by the method described in any one of claims 6 to 8.