Ultraviolet curing asphalt pavement cold patch material

Abstract

The invention relates to the technical field of pavement materials, in particular to an ultraviolet light curing asphalt pavement cold patch material which is composed of cold patch liquid and aggregate, the mass ratio of the cold patch liquid to the aggregate is (4-6): 100, the cold patch liquid comprises decolorized asphalt and an ultraviolet light curing resin system, and the ultraviolet light curing resin system comprises a curing agent and a curing agent. The mass ratio of the decolorized asphalt to the ultraviolet curing resin system is 100: (10-30), and the ultraviolet curing resin system is prepared from the following components in parts by mass: 50 to 70 parts of epoxy acrylate resin, 20 to 40 parts of tripropylene glycol diacrylate, 2 to 5 parts of 2, 4, 6-trimethylbenzoyl-diphenyl phosphine oxide and 0.5 to 1 part of dimethylethanolamine. The problems that a traditional cold patch material is long in curing time and slow in strength forming are solved, a specific ultraviolet curing resin system and decolorized asphalt are adopted, rapid curing is conducted under the illumination condition, high strength is provided for pavement pit slot repairing, vehicle loads can be effectively borne, the durability of a repaired pavement is enhanced, and the requirement for rapid traffic opening is met.

Description

Technical Field

[0001] This invention relates to the field of road surface materials technology, and in particular to a UV-cured asphalt pavement cold patching material. Background Technology

[0002] Asphalt pavement is constructed from asphalt binder and aggregates, and is widely used in urban roads and highways, currently the most widely paved type of high-grade pavement in China. However, during long-term use, asphalt pavement often faces varying degrees of damage due to the combined effects of various complex factors. Low temperatures in winter can easily lead to cracking, while high temperatures in summer can cause rutting, sulking, and bleeding. During the traffic phase, water seepage can soften the base course or subgrade, reducing pavement strength; prolonged sunlight and temperature cycles can accelerate asphalt aging, resulting in decreased adhesion between the asphalt and aggregates. Furthermore, increased traffic volume and repeated vehicle loads, especially overloading and other unreasonable usage, can cause the pavement to loosen. Rainwater erosion and infiltration into the base course, combined with frequent vehicle compaction, further deteriorate the pavement condition, forming potholes. Vehicles traveling on potholed sections experience bumps, affecting driving comfort and posing a significant safety hazard. As time went on, under the combined load, the cracks continued to open and expand, and many potholes connected into one piece. The base layer and subgrade became unstable and deformed, and the local bearing capacity was lost. The road quickly evolved from functional damage to structural damage and lost its traffic function.

[0003] Currently, cold patch materials are mainly classified into three types: solvent-based, emulsion-based, and reactive. Commonly used cold patch materials are mostly solvent-based, exhibiting low initial strength, slow formation, susceptibility to damage from traffic loads, and poor water stability and durability. Traditional hot patching methods are inconvenient for road repairs involving scattered locations and small-scale projects, and cannot be applied in rainy or snowy weather. While cold patching has certain advantages, problems remain. To improve the lifespan of asphalt roads and ensure traffic safety, efficient and rapid repair methods are urgently needed. Therefore, we propose a UV-cured asphalt pavement cold patch material to achieve effective road repair, optimize pavement performance, extend lifespan, and reduce costs. Summary of the Invention

[0004] The purpose of this invention is to provide a UV-curable asphalt pavement cold patch material, which introduces a UV-curable resin system into asphalt, giving the cold patch material high strength, effectively withstanding vehicle loads, and achieving rapid curing of the asphalt cold patch material, enabling effective repair of potholes in asphalt pavement in a short time.

[0005] The technical solution adopted in this invention is as follows: a UV-curable asphalt pavement cold patching material, composed of cold patching liquid and aggregate, wherein the mass ratio of the cold patching liquid to the aggregate is (4-6):100, the cold patching liquid component includes decolorized asphalt and a UV-curable resin system, wherein the mass ratio of the decolorized asphalt to the UV-curable resin system is 100:(10-30), and the UV-curable resin system includes the following components in parts by mass: 50-70 parts of epoxy acrylate resin, 20-40 parts of tripropylene glycol diacrylate, 2-5 parts of 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, and 0.5-1 parts of dimethylethanolamine.

[0006] Furthermore, the aggregate is of the AC-13 gradation type for dense-graded asphalt concrete.

[0007] The basic principle of this invention is that under ultraviolet light irradiation, the photoinitiator absorbs ultraviolet light energy to generate free radicals, which triggers the cross-linking reaction of epoxy acrylate resin. The components undergo rapid chemical reactions and gradually form a three-dimensional network structure. This structure can give the cold patch material high strength, achieving the purpose of rapid and high-strength repair of road potholes.

[0008] The present invention has the following advantages over the prior art:

[0009] 1. This invention solves the problems of long curing time and slow strength development of traditional cold patch materials. It utilizes a specific UV-curing resin system and decolorized asphalt, which cures rapidly under UV light, providing high strength for road pothole repair. This effectively withstands vehicle loads and enhances the durability of the repaired road surface.

[0010] 2. This invention solves the problem that traditional cold patching materials for asphalt pavements cannot be opened to traffic quickly after application. The cold patching material of this invention can meet the requirements for rapid traffic opening within 0.5 hours after application.

[0011] 3. The preparation method of the cold patch material of the present invention is simple. It is mixed evenly according to a specific ratio. It can be quickly cured by light after being spread during construction. The operation is simple. Detailed Implementation

[0012] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that the following specific embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0013] Example 1

[0014] Preparation of cold patching solution: 55 parts by weight of epoxy acrylate resin, 35 parts by weight of tripropylene glycol diacrylate, 3.5 parts by weight of 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, and 0.8 parts by weight of dimethylethanolamine were stirred until homogeneous to obtain a UV-curable resin system. The UV-curable resin system was added to the weighed decolorized asphalt and sheared using a high-speed shearing machine. The mass ratio of decolorized asphalt to UV-curable resin system was 100:15, yielding the cold patching solution.

[0015] Preparation of cold patching material: The cold patching liquid is mixed with the aggregates in AC-13 gradation at a mass ratio of 4:100. The aggregate particle size distribution is as follows: 100% for 16.0mm, 90% for 13.2mm, 0% for 9.5mm, 68% for 4.75mm, 38% for 2.36mm, 24% for 1.18mm, 15% for 0.6mm, 10% for 0.3mm, 7% for 0.15mm, and 5% for 0.075mm. After mixing, the mixture is bagged and sealed to obtain UV-cured asphalt pavement cold patching material.

[0016] The UV-cured asphalt pavement cold patch material prepared in Example 1 was subjected to Marshall stability performance testing in accordance with the "Test Procedure for Asphalt and Asphalt Mixtures in Highway Engineering" (JTG E20-2011). The specific method was as follows: 1200g of cold patch material was weighed and placed in a constant temperature chamber at 25℃ for 2 hours to reach a constant temperature. After that, it was taken out and placed into a mold. The front and back sides of the specimen were compacted 75 times each using a Marshall compactor. After cooling to room temperature and demolding, the specimen was placed on a Marshall stability tester. The tester applied a gradually increasing load to the specimen until the specimen failed. The maximum load was recorded as the Marshall stability value.

[0017] Example 2

[0018] Preparation of cold patching solution: 60 parts by weight of epoxy acrylate resin, 35 parts by weight of tripropylene glycol diacrylate, 3.5 parts by weight of 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, and 0.8 parts by weight of dimethylethanolamine were stirred until homogeneous to obtain a UV-curable resin system. The UV-curable resin system was added to the weighed decolorized asphalt and sheared using a high-speed shearing machine. The mass ratio of decolorized asphalt to UV-curable resin system was 100:15, yielding the cold patching solution.

[0019] Preparation of cold patching material: The cold patching liquid and the aggregate in AC-13 gradation are mixed at a mass ratio of 4.5:100, wherein the aggregate particle size distribution is the same as in Example 1. After mixing, the mixture is bagged and sealed to obtain UV-cured asphalt pavement cold patching material.

[0020] Marshall stability performance was tested for Example 2 using the same method as in Example 1. The test results are shown in Table 1.

[0021] Example 3

[0022] Preparation of cold patching solution: 65 parts by weight of epoxy acrylate resin, 35 parts by weight of tripropylene glycol diacrylate, 3.5 parts by weight of 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, and 0.8 parts by weight of dimethylethanolamine were stirred until homogeneous to obtain a UV-curable resin system. The UV-curable resin system was added to the weighed decolorized asphalt and sheared using a high-speed shearing machine. The mass ratio of decolorized asphalt to UV-curable resin system was 100:15, yielding the cold patching solution.

[0023] Preparation of cold patching material: The cold patching liquid and the aggregate in AC-13 gradation are mixed at a mass ratio of 5:100, wherein the aggregate particle size distribution is the same as in Example 1. After mixing, the mixture is bagged and sealed to obtain UV-cured asphalt pavement cold patching material.

[0024] Marshall stability performance was tested for Example 3 using the same method as in Example 1. The test results are shown in Table 1.

[0025] Comparative Example

[0026] Preparation of traditional cold patch material: The weighed base asphalt is heated to 145℃ until it is in a fluid state. Diesel oil is added as a diluent at 10% of the asphalt mass, and the mixture is stirred evenly to obtain diluted asphalt. The aggregate is graded according to AC-13 and dried in an oven at 105℃ to constant weight. After cooling to room temperature, it is preheated to 70℃. The aggregate is added to the heated diluted asphalt at a mass ratio of 5:100. The mixture is stirred for 15 minutes at a stirring rate of 900 r / min to obtain the traditional cold patch material for asphalt pavement.

[0027] The Marshall stability performance of the comparative example was tested using the same method as in Example 1. The test results are shown in Table 1.

[0028] The Marshall stability test results of cold patch materials in Examples 1-3 and comparative examples are shown in Table 1.

[0029] Table 1. Marshall stability of cold-mixed materials in Examples 1-3 and the comparative examples of the present invention at different curing times.

[0030]

[0031] Comparing the data in Table 1, the Marshall stability of the cold patch materials in Examples 1, 2, and 3 is significantly higher than that of the comparative example. This indicates that the addition of the UV-cured resin system gives the cold patch materials better load-bearing capacity and resistance to deformation. Compared to traditional asphalt pavement cold patch materials that use diesel as a diluent, UV-cured asphalt pavement cold patch materials exhibit superior durability.

[0032] With the increase of epoxy acrylate resin content in the UV-curable resin system, the number of active sites in the photocuring reaction increases, and the Marshall stability of the cold patch material shows an upward trend at different curing times. Under UV irradiation, more resin molecules can participate in the curing and cross-linking reaction, accelerating the formation of a three-dimensional network structure. The cold patch material can reach the initial strength condition of 3kN for traffic opening only 0.5 hours after construction. Compared with traditional cold patch materials, which cannot be quickly opened to traffic after construction, this can greatly reduce traffic congestion time, improve road use efficiency, and meet the requirements for rapid traffic opening. At the same time, the increased relative content of the cold patch liquid makes it easier to mix evenly during construction, improving the convenience of construction.

[0033] The present invention has been described in detail above through embodiments, but the content described is only a preferred embodiment of the present invention and should not be considered as limiting the scope of implementation of the embodiments of the present invention. The protection scope of the embodiments of the present invention is defined by the claims. Any technical solutions designed by those skilled in the art using the technical solutions described in the embodiments of the present invention, or designed by those skilled in the art under the inspiration of the technical solutions of the embodiments of the present invention, within the substance and protection scope of the embodiments of the present invention, to achieve the above-mentioned technical effects, or equivalent changes and improvements made to the scope of the application, should still fall within the patent protection scope of the embodiments of the present invention.

Claims

1. A UV-cured asphalt pavement cold patching material, characterized in that, Composed of cold patching fluid and aggregate, wherein the mass ratio of cold patching fluid to aggregate is (4-6):100, wherein the components of cold patching fluid include decolorized asphalt and UV-curable resin system, wherein the mass ratio of decolorized asphalt to UV-curable resin system is 100:(10-30), wherein the UV-curable resin system comprises the following components in parts by mass: 50-70 parts of epoxy acrylate resin, 20-40 parts of tripropylene glycol diacrylate, 2-5 parts of 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, and 0.5-1 parts of dimethylethanolamine.

2. The UV-cured asphalt pavement cold patching material according to claim 1, characterized in that, The aggregate used is the AC-13 graded dense-graded asphalt concrete.

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