A water-reactive asphalt cold patch material, preparation method and application

Abstract

The present invention provides a water-reactive asphalt cold patch material, a preparation method and an application, which comprises the following components, calculated by mass percentage: 97-98% of asphalt pavement milling material, 0.5-1% of old asphalt activator and 1.5-2.5% of cold patch agent; the strength of the water-reactive asphalt cold patch material of the present invention is mainly derived from the solidification reaction of the old asphalt activator and the active ingredients in the cold patch agent under the action of water. Therefore, compared with traditional asphalt cold patch material, the water-reactive asphalt cold patch material of the present invention has higher initial strength, and the repaired pavement has better durability after being opened to traffic.

Description

Technical Field

[0001] The present invention belongs to the technical field of road paving, and in particular relates to a water-reactive asphalt cold patch material, a preparation method and an application thereof. Background Art

[0002] Repairing damaged or excavated pavement is an important part of daily road maintenance, and the ability to perform pavement repair operations under all-weather conditions is a practical technology that road workers have longed for and pursued. For a long time, pavement repair technologies have mainly been divided into two types: hot patching, which is mainly based on hot-mix asphalt mixtures, and cold patching, which is mainly based on cold-mix asphalt mixtures. Hot patching technology usually requires special machinery and skilled workers, and the remaining materials after the repair are discarded. This is very inconvenient for road maintenance with smaller project volumes. In addition, asphalt pavement is not suitable for construction in low temperatures, rainy days, or when the road surface is wet, which greatly limits the repair operations that may occur at any time. Cold patching technology makes up for the shortcomings of traditional hot patching methods. It is easy to operate, and the materials can be stored and used at any time. It broadens the construction temperature conditions for hot-mix asphalt pavements and has become the preferred method for small-area road repair operations.

[0003] Currently, the most commonly used cold patch material in China is solvent-based cold patch material, which is made by mixing cold patch asphalt with aggregate at a certain temperature. Cold patch asphalt generally consists of base asphalt, diluents, and additives. The diluents are generally petroleum products such as gasoline, kerosene, diesel, and motor oil. The initial strength of solvent-based cold patch material mainly depends on the interlocking force between the aggregates after compaction. The subsequent increase in strength mainly relies on the continuous rolling of the wheels after opening to traffic to further compact the aggregates and the continuous volatilization of the diluent to continuously solidify the binder. However, the initial strength of solvent-based cold patch material is generally low, and the strength growth process is relatively slow, resulting in poor performance, easy loosening and flaking, and secondary damage. The volatilization of the diluent also increases the harm to the natural environment, which conflicts with the current concept of green and sustainable development.

[0004] There are also reactive cold patch materials and emulsified cold patch materials. Reactive cold patch asphalt mixture uses liquid petroleum asphalt mixed with high molecular polymer as the binder. When repairing the road surface, a certain proportion of curing agent is added. The curing agent reacts with the high molecular polymer to form a spatial network solidified material, which provides molding strength and good performance. However, this product is expensive. Emulsified cold patch material is made by mixing emulsified asphalt and aggregate at a certain temperature. The formation of its strength mainly depends on the evaporation of water and the adhesion formed after the emulsified asphalt demulsifies. Therefore, the key is to obtain emulsified asphalt with precisely controlled demulsification time. This is difficult to achieve with existing technologies, which limits its large-scale promotion and application.

[0005] The above three cold patch materials require repairing damaged areas and applying tack coat oil during construction. They cannot be constructed when the pit is damp or there is a small amount of water accumulation. They all have the problem of long curing time and short storage time, and the diluents used are all petroleum-based. Summary of the Invention

[0006] The purpose of the present invention is to provide a water-reactive asphalt cold patch material, a preparation method and an application thereof, which solve the above-mentioned deficiencies of existing cold patch materials.

[0007] In order to achieve the above object, the technical solution adopted in the present invention is:

[0008] The present invention provides a water-reactive asphalt cold patch material, which comprises the following components in percentage by mass:

[0009] 97-98% asphalt pavement milling material, 0.5-1% old asphalt activator and 1.5-2.5% cold patch agent.

[0010] Preferably, the moisture content of the asphalt pavement milling material is less than or equal to 1%.

[0011] Preferably, the old asphalt activator comprises the following components in terms of mass percentage:

[0012] 15-25% biodiesel, 70-80% aromatic oil, 2-3% potassium pyrophosphate, 1-2% dibutyl phthalate, and 1-2% fumed silica.

[0013] Preferably, the cold patch agent comprises the following components by mass percentage: 45-55% of No. 70 base asphalt, 40-50% of vegetable oil, 2-3% of anti-stripping agent, and 3-5% of manganese naphthenate.

[0014] Preferably, the asphalt pavement milling material is composed of three grades of aggregates: 0-5mm, 5-10mm and 10-15mm, and the gradation range of the three grades of aggregates meets LB-13 or LB-10.

[0015] A method for preparing a water-reactive asphalt cold patch material comprises the following steps:

[0016] According to the mass percentage, weigh 97-98% of asphalt pavement milling material, 0.5-1% of old asphalt activator and 1.5-2.5% of cold patch agent;

[0017] Mix the asphalt pavement milling material and the old asphalt activator evenly at room temperature;

[0018] Then add the cold patch agent and continue stirring until there is no white material and the coverage is even, to obtain the water-reactive asphalt cold patch material.

[0019] Preferably, the old asphalt activator is prepared by the following steps:

[0020] According to mass percentage, 15-25% of biodiesel, 70-80% of aromatic oil, 2-3% of potassium pyrophosphate, 1-2% of dibutyl phthalate, and 1-2% of fumed silica are weighed;

[0021] The weighed biodiesel and aromatic oil are mixed and heated and stirred evenly;

[0022] Then add potassium pyrophosphate and dibutyl phthalate and continue stirring evenly;

[0023] Then add fumed silica and stir evenly at room temperature to obtain the old asphalt activator.

[0024] Preferably, the cold patch is prepared by the following steps:

[0025] According to the mass percentage, weigh 45-55% of No. 70 base asphalt, 40-50% of vegetable oil, 2-3% of anti-stripping agent, and 3-5% of manganese naphthenate;

[0026] Heat the weighed No. 70 base asphalt to 135-140°C, then pour the vegetable oil into the No. 70 base asphalt and stir evenly, finally add the anti-stripping agent and manganese cyclohexaneate, continue stirring evenly at a temperature of 60-70°C, and then cool to room temperature to obtain the cold patch.

[0027] An application of the water-reactive asphalt cold patch material, wherein the water-reactive asphalt cold patch material is used for road surface repair operations.

[0028] Preferably, when the water-reactive asphalt cold patch material is used for pavement repair operations, water accounting for 2% of the mass of the water-reactive asphalt cold patch material needs to be sprinkled on the surface of the water-reactive asphalt cold patch material before rolling.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] The present invention provides a water-reactive asphalt cold patch material, which uses asphalt pavement milling material as raw material, realizes 100% recycling and reuse of asphalt pavement milling material and regeneration under normal temperature conditions, and can save more than 80% of new asphalt and 100% new sand and gravel aggregate. At the same time, the strength formation of traditional asphalt cold patch material is mainly related to the volatilization degree of its organic solvent, while the water-reactive asphalt cold patch material of the present invention has no solvent volatilization, and the strength formation mainly comes from the solidification reaction of the old asphalt activator and the active ingredients in the cold patch agent under the action of water. Therefore, compared with traditional asphalt cold patch material, the water-reactive asphalt cold patch material of the present invention has higher initial strength, and the repaired pavement has better durability after opening to traffic. At the same time, the water-reactive asphalt cold patch material of the present invention is superior to traditional cold patch materials in initial strength, water stability and durability of the repaired pavement under harsh repair operation environments such as high altitude, high cold, low temperature rain and snow weather and pothole water accumulation.

[0031] The present invention provides a method for preparing a water-reactive asphalt cold patch material. During its production and use, no heating is required, no fuel is consumed, and no carbon dioxide and toxic and harmful gas emissions are generated. At the same time, the road surface repaired with the cold patch material basically does not produce volatile gases, which is safe and environmentally friendly. DETAILED DESCRIPTION

[0032] In the following description, specific details such as specific system structures and techniques are provided for purposes of illustration rather than limitation to facilitate a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid obscuring the description of the present application with unnecessary detail.

[0033] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or collections thereof.

[0034] To address the numerous issues with traditional cold patch materials, this application has developed a new technology that uses 100% milled waste material as raw material, adds a certain amount of additives, and mixes at room temperature to produce a finished cold patch material. This cold patch material, made entirely of milled waste material and produced at room temperature, offers significant cost advantages. The initial strength of the repaired road surface is higher than that of traditional cold patch materials, resulting in greater durability. Furthermore, this cold patch material can be bagged and stored for long periods at room temperature, ensuring excellent workability and repair results.

[0035] The present application provides a water-reactive asphalt cold patch material, which comprises the following components in percentage by mass:

[0036] 97-98% asphalt pavement milling material, 0.5-1% old asphalt activator and 1.5-2.5% cold patch agent.

[0037] Specifically:

[0038] The moisture content of the asphalt pavement milling material is less than or equal to 1%.

[0039] The old asphalt activator includes the following components in terms of mass percentage:

[0040] 15-25% biodiesel, 70-80% aromatic oil, 2-3% potassium pyrophosphate, 1-2% dibutyl phthalate, and 1-2% fumed silica.

[0041] The cold patch agent comprises the following components in terms of mass percentage: 45-55% of No. 70 base asphalt, 40-50% of vegetable oil, 2-3% of anti-stripping agent, and 3-5% of manganese cyclohexaneate.

[0042] The asphalt pavement milling material is composed of three grades of aggregates: 0-5mm, 5-10mm and 10-15mm, and the gradation range of the three grades of aggregates meets LB-13 or LB-10.

[0043] The present application also provides a method for preparing a water-reactive asphalt cold patch material, comprising the following steps:

[0044] According to the mass percentage, weigh 97-98% of asphalt pavement milling material, 0.5-1% of old asphalt activator and 1.5-2.5% of cold patch agent;

[0045] Mix the asphalt pavement milling material and the old asphalt activator evenly at room temperature;

[0046] Then add the cold patch agent and continue stirring until there is no white material and the coverage is even, to obtain the water-reactive asphalt cold patch material.

[0047] Specifically, the old asphalt activator is prepared by the following steps:

[0048] According to mass percentage, 15-25% of biodiesel, 70-80% of aromatic oil, 2-3% of potassium pyrophosphate, 1-2% of dibutyl phthalate, and 1-2% of fumed silica are weighed;

[0049] The weighed biodiesel and aromatic oil are mixed and heated and stirred evenly;

[0050] Then add potassium pyrophosphate and dibutyl phthalate and continue stirring evenly;

[0051] Then add fumed silica and stir evenly at room temperature to obtain the old asphalt activator.

[0052] The cold patching agent is prepared by the following steps:

[0053] According to the mass percentage, weigh 45-55% of No. 70 base asphalt, 40-50% of vegetable oil, 2-3% of anti-stripping agent, and 3-5% of manganese naphthenate;

[0054] Heat the weighed No. 70 base asphalt to 135-140°C, then pour the vegetable oil into the No. 70 base asphalt and stir evenly, finally add the anti-stripping agent and manganese cyclohexaneate, continue stirring evenly at a temperature of 60-70°C, and then cool to room temperature to obtain the cold patch.

[0055] The present application also provides an application of a water-reactive asphalt cold patch material, which is used for pavement repair operations. When the water-reactive asphalt cold patch material is used for pavement repair operations, 2% of the mass of the water-reactive asphalt cold patch material must be sprinkled on the surface of the water-reactive asphalt cold patch material before rolling.

[0056] Example 1

[0057] This embodiment provides a water-reactive asphalt cold patch material, comprising the following components:

[0058] Asphalt pavement milling material 97%

[0059] Old asphalt activator 1%

[0060] Cold Tonic 2%

[0061] Among them: the moisture content of the asphalt pavement milling material does not exceed 1%, and it is composed of three grades of aggregates: 0-5mm, 5-10mm and 10-15mm. The gradation range meets the requirements of LB-13 and LB-10. The pass rate of each sieve hole is shown in Table 1.

[0062] Table 1 Passage rate of each sieve hole of LB-13 and LB-10 gradation (%)

[0063]

[0064] The old asphalt activator consists of the following components by mass percentage: 15% of biodiesel, 80% of aromatic oil, 2% of potassium pyrophosphate, 2% of dibutyl phthalate and 1% of fumed silica.

[0065] The cold patch agent is composed of the following components by mass percentage: 55% of No. 70 base asphalt, 40% of vegetable oil, 2% of anti-stripping agent and 3% of manganese naphthenate.

[0066] A method for preparing a water-reactive asphalt cold patch material comprises the following steps:

[0067] The first step is to prepare the old asphalt activator: pour biodiesel and aromatic oil into the reaction vessel, heat to 60°C, stir for 30 minutes, then add potassium pyrophosphate and dibutyl phthalate and continue stirring for 40 minutes. Finally, add fumed silica and stir at high speed at room temperature for 20 minutes at a stirring speed of 1200r / min to obtain the old asphalt activator.

[0068] The second step is the preparation of the cold patch agent: heat the No. 70 base asphalt to 140°C, then pour the vegetable oil into the No. 70 base asphalt and stir evenly, finally add the anti-stripping agent and manganese cyclohexaneate, continue stirring at a temperature of 65°C for 20 minutes, the stirring speed is 240r / min, and cool to room temperature to obtain the cold patch agent.

[0069] The third step is the preparation of water-reactive cold patch material: pour the asphalt pavement milling material into a drum mixer or a twin-shaft mixer, add the old asphalt activator and stir for 3 minutes under room temperature conditions, and finally add the cold patch agent and continue stirring for 4 minutes to obtain the water-reactive asphalt cold patch material of the present invention.

[0070] Example 2

[0071] This embodiment provides a water-reactive asphalt cold patch material, comprising the following components:

[0072] Asphalt pavement milling material 97%

[0073] Old asphalt activator 0.5%

[0074] Cold Tonic 2.5%

[0075] The moisture content requirement, gradation type and pass rate of each sieve hole of the asphalt pavement milling material in this embodiment are the same as those in Example 1.

[0076] The old asphalt activator is composed of the following components by mass percentage: 20% biodiesel, 75% aromatic oil, 2% potassium pyrophosphate, 2% dibutyl phthalate, and 1% fumed silica; the cold patch agent is composed of the following components by mass percentage: 45% No. 70 base asphalt, 50% vegetable oil, 2% anti-stripping agent, and 3% manganese cyclopentaneate.

[0077] The preparation process of the water-reactive asphalt cold patch material is the same as that in Example 1.

[0078] Example 3

[0079] This embodiment provides a water-reactive asphalt cold patch material, comprising the following components:

[0080] Asphalt pavement milling material 98%

[0081] Old asphalt activator 0.5%

[0082] Cold Tonic 1.5%

[0083] The moisture content requirement, gradation type and pass rate of each sieve hole of the asphalt pavement milling material in this embodiment are the same as those in Example 1.

[0084] The old asphalt activator is composed of the following components by mass percentage: 15% biodiesel, 80% aromatic oil, 3% potassium pyrophosphate, 1% dibutyl phthalate, and 1% fumed silica; the cold patch agent is composed of the following components by mass percentage: 45% No. 70 base asphalt, 50% vegetable oil, 2% anti-stripping agent, and 3% manganese cyclopentaneate.

[0085] The preparation process of the water-reactive asphalt cold patch material is the same as that in Example 1.

[0086] Example 4

[0087] This embodiment provides a water-reactive asphalt cold patch material, comprising the following components:

[0088] Asphalt pavement milling material 98%

[0089] Old asphalt activator 1%

[0090] Cold Tonic 1%

[0091] The moisture content requirement, gradation type and pass rate of each sieve hole of the asphalt pavement milling material in this embodiment are the same as those in Example 1.

[0092] The old asphalt activator is composed of the following components by mass percentage: 25% biodiesel, 70% aromatic oil, 3% potassium pyrophosphate, 1% dibutyl phthalate, and 1% fumed silica; the cold patch agent is composed of the following components by mass percentage: 45% No. 70 base asphalt, 50% vegetable oil, 2% anti-stripping agent, and 3% manganese cyclopentaneate.

[0093] The preparation process of the water-reactive asphalt cold patch material is the same as that in Example 1.

[0094] Example 5

[0095] This embodiment provides a water-reactive asphalt cold patch material, comprising the following components:

[0096] Asphalt pavement milling material 97%

[0097] Old asphalt activator 0.5%

[0098] Cold Tonic 2.5%

[0099] The moisture content requirement, gradation type and pass rate of each sieve hole of the asphalt pavement milling material in this embodiment are the same as those in Example 1.

[0100] The old asphalt activator is composed of the following components by mass percentage: 25% biodiesel, 68% aromatic oil, 3% potassium pyrophosphate, 2% dibutyl phthalate, and 2% fumed silica; the cold patch agent is composed of the following components by mass percentage: 47% No. 70 base asphalt, 45% vegetable oil, 3% anti-stripping agent, and 5% manganese cyclopentaneate.

[0101] The preparation process of the water-reactive asphalt cold patch material is the same as that in Example 1.

[0102] Example 6

[0103] This embodiment provides a water-reactive asphalt cold patch material, comprising the following components:

[0104] Asphalt pavement milling material 97.5%

[0105] Old asphalt activator 0.5%

[0106] Cold Tonic 2%

[0107] The moisture content requirement, gradation type and pass rate of each sieve hole of the asphalt pavement milling material in this embodiment are the same as those in Example 1.

[0108] The old asphalt activator is composed of the following components by mass percentage: 20% biodiesel, 75% aromatic oil, 3% potassium pyrophosphate, 1% dibutyl phthalate, and 1% fumed silica; the cold patch agent is composed of the following components by mass percentage: 45% No. 70 base asphalt, 50% vegetable oil, 3% anti-stripping agent, and 2% manganese cyclopentaneate.

[0109] The preparation process of the water-reactive asphalt cold patch material is the same as that in Example 1.

[0110] To verify the beneficial effects of the products of the present invention, the water-reactive asphalt cold patch materials prepared in Examples 1-6 were tested in accordance with the relevant technical requirements and test methods of the "Asphalt Pavement Pothole Cold Patch Finished Material" (JT / T 972-2015) and the "Technical Specification for Highway Asphalt Pavement Construction" (JTJF40-2004). The test results are shown in Tables 2 and 3. During the Marshall test piece forming process, water (2% by weight of the cold patch material) was added to the water-reactive asphalt cold patch materials. The comparative examples in Tables 2 and 3 are commercially available cold patch materials with LB-13 and LB-10 gradations.

[0111] Table 2 Performance test results of LB-13 water-reactive asphalt cold patch material

[0112]

[0113]

[0114] Table 3 Performance test results of LB-10 water-reactive asphalt cold patch material

[0115]

[0116] The test results in Tables 2 and 3 show that the road technical performance of the water-reactive asphalt cold patch material implementation columns 1-6 of the present invention all meet the technical requirements of the specifications, indicating that the old asphalt activator and cold patch agent of the present invention achieve 100% recycling and reuse of asphalt pavement milling materials and regeneration under normal temperature conditions; the test results of the Marshall stability and water stability indicators of the water-reactive asphalt cold patch material implementation columns 1-6 are significantly better than those of the control example, indicating that the water-reactive asphalt cold patch material of the present invention has better durability.

[0117] The strength of asphalt cold patch material is crucial for the durability of repaired pavement. As a type of asphalt mixture, its strength is essentially the same as that of hot asphalt mixture, determined by the mixture's internal friction and cohesion. However, the former's strength development is related to the degree of organic solvent volatilization, which dictates two strength requirements for cold patch material in engineering applications: initial strength and final strength. Immediately after application, cold patch material has not yet fully reached its final strength. To meet the requirements of immediate reopening to traffic, the mixture must possess a certain initial strength and stiffness to withstand vehicle loads. Furthermore, to ensure that pavement repaired with cold patch material does not develop new pavement defects during long-term use, particularly under the repeated effects of traffic loads during the hot summer months, the asphalt cold patch material must possess sufficient strength and stability to withstand external loads, known as final strength.

[0118] The difference in strength formation between the water-reactive asphalt cold patch material of the present invention and the traditional asphalt cold patch material is that the strength formation of the traditional asphalt cold patch material is mainly related to the volatilization degree of its organic solvent, while the water-reactive asphalt cold patch material of the present invention has no solvent volatilization, and the strength formation mainly comes from the solidification reaction of the old asphalt activator and the active ingredients in the cold patch agent under the action of water. Therefore, compared with the traditional asphalt cold patch material, the water-reactive asphalt cold patch material of the present invention has higher initial strength, and the repaired road surface has better durability after being opened to traffic.

[0119] To verify the beneficial effect of the present invention on initial strength, the water-reactive asphalt cold patch materials prepared in Examples 1-6 were tested using the modified Marshall test method. The test results are shown in Table 4. During the Marshall test, water (2% by weight of the cold patch material) was added to the water-reactive asphalt cold patch materials. The comparative examples in Table 4 are the same as those in Tables 2 and 3.

[0120] Modified Marshall test method: take an appropriate amount of cold patch material, take the height of the compacted specimen as 63.5±1.3mm as the standard, seal it with a plastic bag and place it in a constant temperature chamber at 25℃ for 12 hours, take it out and put it into the Marshall test mold, compact it 75 times on both sides, and then put it into a constant temperature chamber at 25℃ together with the demoulding for another 12 hours. After taking it out, demould it immediately and measure its Marshall stability directly on the Marshall stability instrument, which is the initial Marshall stability.

[0121] Table 4 Test results of initial strength of water-reactive asphalt cold patch material

[0122]

[0123] The test results in Table 4 show that the initial strength of the water-reactive asphalt cold patch material embodiments 1-6 of the present invention is not only significantly better than that of the control example, but also meets the technical requirements (>3kN) for the Marshall stability index of asphalt cold patch material in the "Asphalt Pavement Pothole Cold Patch Finished Material" (JT / T 972-2015) and the "Technical Specifications for Highway Asphalt Pavement Construction" (JTJ F40-2004), once again proving the beneficial effects of the water-reactive asphalt cold patch material of the present invention.

[0124] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A water-reactive asphalt cold patch material, characterized in that: Calculated by mass percentage, it includes the following components: 97-98% asphalt pavement milling material, 0.5-1% old asphalt activator and 1.5-2.5% cold patch; The old asphalt activator comprises the following components in percentage by mass: 15-25% biodiesel, 70-80% aromatic oil, 2-3% potassium pyrophosphate, 1-2% dibutyl phthalate, 1-2% fumed silica; The cold patching agent comprises the following components in terms of mass percentage: 45-55% of No. 70 base asphalt, 40-50% of vegetable oil, 2-3% of anti-stripping agent, and 3-5% of manganese naphthenate.

2. A water-reactive asphalt cold patch material according to claim 1, characterized in that: The moisture content of asphalt pavement milling material is less than or equal to 1%.

3. The water-reactive asphalt cold patch material according to claim 1, characterized in that: The asphalt pavement milling material is composed of three grades of aggregates: 0-5mm, 5-10mm and 10-15mm, and the gradation range of the three grades of aggregates meets LB-13 or LB-10.

4. A method for preparing a water-reactive asphalt cold patch material, characterized in that: The following steps are involved: According to the mass percentage, weigh 97-98% of asphalt pavement milling material, 0.5-1% of old asphalt activator and 1.5-2.5% of cold patch agent; Mix the asphalt pavement milling material and the old asphalt activator evenly at room temperature; Then add the cold patch agent and continue stirring until there is no white material and the mixture is evenly covered to obtain the water-reactive asphalt cold patch material; The old asphalt activator is prepared by the following steps: According to mass percentage, 15-25% of biodiesel, 70-80% of aromatic oil, 2-3% of potassium pyrophosphate, 1-2% of dibutyl phthalate, and 1-2% of fumed silica are weighed; The weighed biodiesel and aromatic oil are mixed and heated and stirred evenly; Then add potassium pyrophosphate and dibutyl phthalate and continue stirring evenly; Then add fumed silica and stir evenly at room temperature to obtain the old asphalt activator; The cold patching agent is prepared by the following steps: According to the mass percentage, 45-55% of No. 70 base asphalt, 40-50% of vegetable oil, 2-3% of anti-stripping agent, and 3-5% of manganese naphthenate are weighed; Heat the weighed No. 70 base asphalt to 135-140°C, then pour the vegetable oil into the No. 70 base asphalt and stir evenly, finally add the anti-stripping agent and manganese cyclohexaneate, continue stirring evenly at a temperature of 60-70°C, and then cool to room temperature to obtain the cold patch.

5. An application of the water-reactive asphalt cold patch material according to any one of claims 1 to 3, characterized in that: The water-reactive asphalt cold patch material is used for road surface repair operations.

6. The use of a water-reactive asphalt cold patch material according to claim 5, characterized in that: When using water-reactive asphalt cold patch material for road repair operations, it is necessary to spread 2% water by mass of the water-reactive asphalt cold patch material on the surface of the water-reactive asphalt cold patch material before rolling it.

Images