Pressure-sensitive asphalt repairing material as well as preparation method and application thereof

Abstract

The invention discloses a pressure-sensitive asphalt repairing material as well as a preparation method and application thereof, relates to the field of road repairing, and aims to solve the problems that road repairing is greatly influenced by the environment, VOC (volatile organic compound) gas is released and the energy consumption of a preparation process is high in the prior art. And the interface activation coupling agent is hydrogenated tallow amine polyoxyethylene ether ethyl methyl dimethoxy silane. Construction can be conducted at normal temperature, heating is not needed in the construction process, VOC release is avoided, stones are bonded into a whole after asphalt is exposed through repeated rolling of a vehicle, and the application requirement for road pit slot repairing is met. The concrete has the advantages of environment friendliness, simplicity in construction, no harm to human bodies, capability of quickly opening traffic, good use effect, high pavement strength and long duration. The raw materials are wide in source, the production process is only normal-temperature stirring, the production energy consumption is low, and the process is simple.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of road repair, in particular to a pressure-sensitive asphalt repair material and a preparation method and application thereof. BACKGROUND

[0002] At present, the repair of road pit and groove is mostly carried out by excavating, expanding groove, and then filling new hot-mixed asphalt mixture, and then rolling and forming to achieve the purpose of repair. The disadvantage is that the source of hot-mixed asphalt mixture is limited, and it is greatly affected by seasons, especially in winter. The environmental temperature is low, and the paving temperature of hot-mixed asphalt mixture usually needs to be not less than 130℃, and the rolling temperature needs to be maintained above 110℃. However, in winter, the environmental temperature is too low, and the heat of the mixture is lost very quickly. Therefore, the temperature may be below the critical value before the rolling is completed, resulting in insufficient compaction, increased void ratio of the road surface, and easy water and loose in the subsequent use process, which greatly reduces the strength and durability. Therefore, the too low environmental temperature greatly restricts the timely repair of the road pit and groove, and easily leads to traffic accidents. Secondly, the hot-mixed asphalt mixture will release VOC, which is not conducive to environmental protection.

[0003] Chinese patent CN103043962B discloses an asphalt pavement pit and groove normal temperature repair mixture, a preparation method and application thereof. The asphalt pavement pit and groove normal temperature repair mixture comprises asphalt liquid, stone, cement and waste rubber powder. The asphalt liquid comprises modified asphalt, diluent or ordinary asphalt, polymer and diluent. The diluent is selected from one or a mixture of several of No. 6 solvent oil, No. 120 solvent oil and No. 200 solvent oil. In the preparation process, the asphalt liquid needs to be prepared at 100-120℃ or 120-140℃, and then the mixture is mixed at 70-90℃.

[0004] In the existing patent, volatile organic solvents with irritating odor are used as diluents. In the construction process, as the diluent volatilizes, a high VOC release may occur at the construction site, and the processing process needs to be maintained at 70-90℃ for stirring, which has high energy consumption. SUMMARY

[0005] The technical problem to be solved by the present application is to overcome the defects of the prior art and provide a pressure-sensitive asphalt repair material and a preparation method and application thereof, which can effectively solve the problems in the background art.

[0006] In order to achieve the above-mentioned purpose, the present application discloses a pressure-sensitive asphalt repair material, which adopts the technical scheme of comprising the following components by weight:

[0007] 100 parts of stone, 3-8 parts of water-activated cold repair asphalt liquid, 1-5 parts of interface activation coupling agent, and 5-15 parts of separation agent.

[0008] The water-activated cold-patch asphalt liquid includes asphalt and a non-volatile reactive solvent. The asphalt is dissolved in the non-volatile reactive solvent and is a flowing liquid at room temperature. It can bind the stone into a whole under the viscosity of the asphalt, thereby improving the repair strength.

[0009] The interface activating coupling agent is hydrogenated tallow amine polyoxyethylene ether ethyl methyl dimethoxysilane, and its molecular structural formula is:

[0010] .

[0011] Interfacial activating coupling agents incorporate hydrophobic groups, polyoxyethylene ether groups, and siloxane groups into a single molecule. This results in a novel interfacial activating coupling agent molecule that combines the properties of an interfacial activator and a coupling agent. This allows for effective interfacial activation, coupling, and bonding of aggregates, asphalt, and release agents, thereby improving their performance.

[0012] The release agent coats the asphalt-coated aggregate to prevent it from sticking together. During storage and transportation, it keeps the repair material in a loose state. After repair, repeated vehicle driving causes the release agent to peel off and crack under friction, exposing the internal asphalt and allowing it to bond.

[0013] This pressure-sensitive asphalt repair material can directly fill potholes at room temperature without heating or excavation. It is easy to apply and produces no VOCs or other polluting gases, making it environmentally friendly and suitable for construction workers.

[0014] As a preferred embodiment of the present invention, the separating agent includes talc powder, mica powder, and natural asphalt.

[0015] This invention also discloses a method for preparing the aforementioned pressure-sensitive asphalt repair material. The technical solution involves adding 100 parts of aggregate to a mixer, adding 3-8 parts of water-activated cold-applied asphalt liquid to the mixer, and mixing until the aggregate is coated with the water-activated cold-applied asphalt liquid; then adding 1-5 parts of an interface activating coupling agent to the mixer and mixing evenly; finally, adding 5-15 parts of a release agent to the mixer and mixing evenly to obtain the pressure-sensitive asphalt repair material. The preparation method is simple and convenient.

[0016] As a preferred embodiment of the present invention, the preparation method of the interface activating coupling agent includes the following steps:

[0017] Step 1: Add vinylmethyldimethoxysilane to the hydrogenated tallow amine polyoxyethylene ether solution;

[0018] Step 2: Proceed with the synthesis reaction;

[0019] Step 3: Remove the isopropanol.

[0020] As a preferred embodiment of the present invention, the hydrogenated tallow amine polyoxyethylene ether solution is a solution formed by dissolving hydrogenated tallow amine polyoxyethylene ether in isopropanol.

[0021] As a preferred embodiment of the present invention, in step 1, the molar ratio of hydrogenated tallow amine polyoxyethylene ether to vinylmethyl dimethoxysilane is 1:(1.00-2.05).

[0022] In a preferred embodiment of the present invention, in step 2, the reaction temperature of the synthesis reaction is 60–80°C and the reaction time is 3–5 h.

[0023] As a preferred embodiment of the present invention, in step 3, the isopropanol is removed by atmospheric distillation.

[0024] The present invention also discloses the application of the above-mentioned pressure-sensitive asphalt repair material. The technical solution adopted is to fill the pothole with the pressure-sensitive asphalt repair material at ambient temperature, and then compact it by a passing vehicle.

[0025] Compared with existing technologies, the beneficial effects of this invention are as follows: This invention mixes water-activated cold-mix asphalt liquid with aggregate, and adds hydrogenated tallow amine polyoxyethylene ether ethyl methyl dimethoxysilane interfacial activating coupling agent and release agent to prepare a pressure-sensitive asphalt repair material that can be applied at room temperature. No heating is required during construction, and there is no VOC release. Repeated vehicle compaction exposes the asphalt, causing the aggregate to bond together as a whole, meeting the application requirements for road pothole repair. It has the advantages of being environmentally friendly, simple to apply, harmless to humans, allowing for rapid reopening to traffic, good performance, high pavement strength, and long service life. Furthermore, the raw materials for this invention are widely available, the production process involves only room-temperature mixing, resulting in low energy consumption and a simple process. It can be applied year-round, unaffected by weather or rain, ensuring timely repair of road potholes and reducing negative impacts on road traffic. Attached Figure Description

[0026] Figure 1 The infrared spectrum of the hydrogenated tallow amine polyoxyethylene ether ethyl methyl dimethoxysilane product prepared in Example 1 of this invention. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Example 1

[0029] As a first embodiment of the present invention, a pressure-sensitive asphalt repair material is disclosed. The technical solution adopted is as follows: 100kg of stone, 5kg of water-activated cold-mix asphalt liquid, 3kg of hydrogenated tallow amine polyoxyethylene ether ethyl methyl dimethoxysilane (interface activation coupling agent), and 9kg of release agent (comprising 3kg of talc powder, 3kg of mica powder and 3kg of natural asphalt mixed together).

[0030] Stone materials with a particle size of 0-3mm and 3-5mm are mixed at a mass ratio of 1:1 for production.

[0031] The main components of water-activated cold patch asphalt solution include asphalt and non-volatile reactive solvents. The asphalt is dissolved in the non-volatile reactive solvent, and it is a flowing liquid at room temperature. The water-activated cold patch asphalt solution uses the LT-WRA type, produced and sold by Xinxiang Longteng Highway Technology Co., Ltd., and represents existing technology.

[0032] The molecular structure of the interface-activating coupling agent hydrogenated tallow amine polyoxyethylene ether ethyl methyl dimethoxysilane is as follows:

[0033] ;

[0034] The preparation method of the interface activating coupling agent hydrogenated tallow amine polyoxyethylene ether ethyl methyl dimethoxysilane is as follows:

[0035] 1589.0 g of hydrogenated tallow amine polyoxyethylene ether (A-1830) (1 mol) was dissolved in 650 g of isopropanol at 75 °C. Then, 137.5 g of vinylmethyl dimethoxysilane (1.04 mol, with a molar ratio of 1:1.04 between hydrogenated tallow amine polyoxyethylene ether and vinylmethyl dimethoxysilane) was added. The mixture was stirred at 75 °C for 4 h. The isopropanol was then evaporated under normal pressure to obtain hydrogenated tallow amine polyoxyethylene ether ethylmethyl dimethoxysilane.

[0036] Hydrogenated tallow amine polyoxyethylene ether is:

[0037]

[0038] The equation for the reaction is:

[0039]

[0040] Infrared spectral analysis of the prepared hydrogenated tallow amine polyoxyethylene ether ethylmethyl dimethoxysilane yielded the following results: Figure 1 As shown: 3404 cm -1 Peak 1 is the absorption peak of the OH stretching vibration, at 2923 cm⁻¹. -1 Peak 2 is the absorption peak of the asymmetric stretching vibration of the methylene group, at 2862 cm⁻¹. -1Peak 3 is the peak of the symmetric stretching vibration of the methylene group, at 1456 cm⁻¹. -1 (peak 4) represents the asymmetric bending vibration of the methylene group, at 1353 cm⁻¹. -1 (peak 5) represents the symmetrical bending vibration of the methylene group, 1103 cm⁻¹. -1 Peak 6 is the absorption peak of CN stretching vibration, at 839 cm⁻¹. -1 Peak 7 is the absorption peak of the Si-C stretching vibration, at 723 cm⁻¹. -1 (peak 8) represents the in-plane rocking vibration of the methylene group, 480 cm⁻¹. -1 (peak 9) is the absorption peak of Si-O stretching vibration.

[0041] This embodiment also discloses a method for preparing the aforementioned pressure-sensitive asphalt repair material. The technical solution involves adding aggregate to a mixer according to a specified weight ratio, adding water-activated cold-applied asphalt liquid to the mixer, and mixing until the aggregate is coated with the water-activated cold-applied asphalt liquid. Then, hydrogenated tallow amine polyoxyethylene ether ethyl methyl dimethoxysilane is added to the mixer and mixed evenly. Finally, a release agent is added to the mixer and mixed evenly to obtain the pressure-sensitive asphalt repair material. Due to the barrier effect of the release agent, this pressure-sensitive asphalt repair material remains in a dispersed state during storage or transportation at room temperature.

[0042] The application method of the above-mentioned pressure-sensitive asphalt repair material is as follows:

[0043] Clean the potholes in the road surface to be repaired, fill them with pressure-sensitive asphalt repair material, and spread it out. The pressure-sensitive asphalt repair material should be 1cm higher than the road surface. It can be compacted by passing vehicles. During the repeated compaction process, the release agent on the surface of the pressure-sensitive asphalt repair material will crack and peel off under mutual friction, exposing the internal water to activate the asphalt in the cold-applied asphalt liquid, so that the adjacent stones can bond together to form a whole.

[0044] Example 2

[0045] The difference between this embodiment and Embodiment 1 is that the pressure-sensitive asphalt repair material includes 100kg of aggregate, 3kg of water-activated cold patch asphalt liquid, 1kg of hydrogenated tallow amine polyoxyethylene ether ethyl methyl dimethoxysilane (interface activation coupling agent), and 6kg of release agent (comprising 2kg of talc powder, 2kg of mica powder, and 2kg of natural asphalt).

[0046] In the preparation method of hydrogenated tallow amine polyoxyethylene ether ethyl methyl dimethoxysilane, 1589.0 g of hydrogenated tallow amine polyoxyethylene ether (A-1830) (1 mol) is dissolved in 650 g of isopropanol at 60 °C, and then 267.1 g of vinyl methyl dimethoxysilane (2.02 mol, the molar ratio of hydrogenated tallow amine polyoxyethylene ether to vinyl methyl dimethoxysilane is 1:2.02) is added. The mixture is stirred and reacted at 60 °C for 5 h. The isopropanol is then evaporated under normal pressure to obtain hydrogenated tallow amine polyoxyethylene ether ethyl methyl dimethoxysilane.

[0047] Example 3

[0048] The difference between this embodiment and Embodiment 1 is that the pressure-sensitive asphalt repair material includes 100kg of aggregate, 8kg of water-activated cold patch asphalt liquid, 5kg of hydrogenated tallow amine polyoxyethylene ether ethyl methyl dimethoxysilane (interface activation coupling agent), and 15kg of release agent (including 5kg of talc powder, 5kg of mica powder and 5kg of natural asphalt mixed together).

[0049] In the preparation method of hydrogenated tallow amine polyoxyethylene ether ethylmethyl dimethoxysilane, 1589.0g of hydrogenated tallow amine polyoxyethylene ether (A-1830) (1mol) is dissolved in 650g of isopropanol at 80℃, and then 194.4g of vinylmethyl dimethoxysilane (1.47mol, the molar ratio of hydrogenated tallow amine polyoxyethylene ether to vinylmethyl dimethoxysilane is 1:1.47) is added. The mixture is stirred and reacted at 80℃ for 3h. The isopropanol is then evaporated under normal pressure to obtain hydrogenated tallow amine polyoxyethylene ether ethylmethyl dimethoxysilane.

[0050] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pressure-sensitive asphalt repair material, characterized in that, The components are included by weight as follows: 100 parts stone, 3-8 parts water-activated cold patch asphalt liquid, 1-5 parts interface activation coupling agent, 5-15 parts release agent; The water-activated cold patch asphalt liquid includes asphalt and a non-volatile reactive solvent. The asphalt is dissolved in the non-volatile reactive solvent and is a flowing liquid at room temperature. The interface activating coupling agent is hydrogenated tallow amine polyoxyethylene ether ethyl methyl dimethoxysilane, and its molecular structural formula is: 。 2. The pressure-sensitive asphalt repair material according to claim 1, characterized in that: The separating agent includes talc powder, mica powder, and natural asphalt.

3. A method for preparing the pressure-sensitive asphalt repair material as described in claim 1, characterized in that: Add 100 parts of aggregate to the mixer, add 3-8 parts of water-activated cold patch asphalt liquid to the mixer, and mix until the aggregate is coated with water-activated cold patch asphalt liquid; then add 1-5 parts of interface activation coupling agent to the mixer and mix evenly; add 5-15 parts of release agent to the mixer and mix evenly to obtain pressure-sensitive asphalt repair material.

4. The method according to claim 3, characterized in that, The preparation method of the interface activating coupling agent includes the following steps: Step 1: Add vinylmethyldimethoxysilane to the hydrogenated tallow amine polyoxyethylene ether solution; Step 2: Proceed with the synthesis reaction; Step 3: Remove the isopropanol.

5. The method according to claim 4, characterized in that: The hydrogenated tallow amine polyoxyethylene ether solution is a solution formed by dissolving hydrogenated tallow amine polyoxyethylene ether in isopropanol.

6. The method according to claim 4, characterized in that: In step 1, the molar ratio of hydrogenated tallow amine polyoxyethylene ether to vinylmethyl dimethoxysilane is 1:(1.00-2.05).

7. The method according to claim 4, characterized in that: In step 2, the reaction temperature of the synthesis reaction is 60–80°C, and the reaction time is 3–5 h.

8. The method according to claim 4 or 5, characterized in that: In step 3, the isopropanol is removed by atmospheric distillation.

9. An application of the pressure-sensitive asphalt repair material as described in claim 1, characterized in that: The pressure-sensitive asphalt repair material is filled into the pothole at ambient temperature and then compacted by passing vehicles.

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