Slow-release ice-melting aggregate for road skid-resistant wearing layer and preparation and application thereof

Abstract

This application relates to a slow-release snow-melting aggregate for road anti-skid wear layers, its preparation, and its application, aiming to solve the technical problems of existing de-icing agents having significant side effects, existing wear layer mixtures having limited road performance, and insufficient wear resistance and high-temperature stability. The slow-release snow-melting aggregate provided in this application is made from a mixture of sodium acetate, magnesium peroxide, potassium pyrophosphate, sodium alginate, single-layer graphene oxide powder, nano-SiO2, de-icing agent carrier, surfactant, polymer emulsion, cement, water, and additives. The synergistic effect of the various raw material components in this application improves the wear resistance and high-temperature stability of the mixture, enabling the road surface constructed from this mixture to possess excellent wear resistance. Furthermore, under high-temperature conditions, its internal temperature decreases from top to bottom, actively melting ice and snow, preventing road icing, and exhibiting excellent road performance. It plays a crucial role in timely snow and ice removal, ensuring winter road driving safety, and extending the service life of asphalt pavements.

Description

Technical Field

[0001] This application relates to the field of road surface de-icing and snow removal technology, specifically to a slow-release snow-melting aggregate for road anti-skid wear layer and its preparation and application. Background Technology

[0002] Transportation is the lifeblood of the national economy, but snow and ice accumulation on roads severely impacts traffic safety and efficiency, and is a significant constraint on economic development in high-altitude and cold regions. In most parts of northern China, snowfall frequently leads to snow and ice accumulation on roads during winter. This causes car tires to come into direct contact with the icy and snowy surface, hindering tire contact and reducing tire friction. This can result in vehicle skidding and braking difficulties, easily leading to loss of control, traffic accidents, and loss of life and property.

[0003] With the rapid development of highway infrastructure in my country, highway transportation is shifting from a construction-oriented to a construction-maintenance-oriented development model. Currently, asphalt pavements face urgent demands for large-scale maintenance and winter snow and ice melting. Therefore, there is a pressing need to develop pavement materials with snow melting, ice melting, and maintenance functions to meet the requirements of low-cost, environmentally friendly, high-quality road de-icing and long-term road lifespan. Thus, developing a pavement material that combines active maintenance and snow melting capabilities is particularly crucial.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the background technology of this disclosure and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0005] This application provides a method for preparing and applying an anti-skid wear layer mixture, aiming to solve the technical problems of existing de-icing agents having large side effects, existing wear layer mixtures having limited road performance, and insufficient wear resistance and high-temperature stability.

[0006] According to one aspect of this application, a slow-release snow and ice melting aggregate for road anti-skid wear layer is provided, which is made from the following raw materials in parts by weight:

[0007] Sodium acetate 1-5 parts, magnesium peroxide 0.5-2.5 parts, potassium pyrophosphate 1-3 parts, sodium alginate 1-3 parts, monolayer graphene oxide powder 0.1-0.7 parts, nano-SiO2 0.5-1.1 parts; de-icing agent carrier 60-100 parts, surfactant 1-5 parts; polymer emulsion 1-7 parts, cement 30-50 parts, water 80-120 parts, additives 0.34-0.38 parts.

[0008] In some embodiments of this application, the slow-release snow and ice melting aggregate is made from the following raw materials in parts by weight:

[0009] Sodium acetate 2-4 parts, magnesium peroxide 1-2 parts, potassium pyrophosphate 1.5-2.5 parts, sodium alginate 1.5-2.5 parts, monolayer graphene oxide powder 0.2-0.5 parts, nano-SiO2 0.6-0.9 parts; de-icing agent carrier 60-100 parts, surfactant 2-4 parts; polymer emulsion 2-5 parts, cement 30-50 parts, water 90-110 parts, additives 0.34-0.38 parts.

[0010] In some embodiments of this application, the de-icing agent carrier is crushed shale ceramsite.

[0011] In some embodiments of this application, the surfactant is polyethylene glycol.

[0012] In some embodiments of this application, the polymer emulsion is a silicone-acrylic emulsion.

[0013] In some embodiments of this application, the auxiliary agent is 12-ol ester.

[0014] According to another aspect of this application, a method for preparing slow-release snow and ice melting aggregate is provided, comprising the following steps:

[0015] (1) Prepare the raw materials according to the above proportions and set aside;

[0016] (2) Preparation of composite snow melting salt solution: Sodium acetate, magnesium peroxide, potassium pyrophosphate and sodium alginate are dissolved in water at 50℃~70℃ in proportion, monolayer graphene oxide powder and nano SiO2 are added and dispersed for 2h to obtain the solution.

[0017] (3) Preparation of snow melting aggregate: The snow melting agent carrier is soaked in the composite snow melting salt solution, a surfactant is added, the mixture is stirred for 5 minutes, soaked for 4 hours, and then dried to obtain snow melting aggregate;

[0018] (4) Preparation of slow-release de-icing and snow-melting aggregate: Mix polymer emulsion, cement, water and additives in proportion, and slowly coat and cure the de-icing and snow-melting aggregate. Slow-release de-icing salt aggregate with particle size of 4.75 mm and 2.36 mm is obtained by sieving.

[0019] According to another aspect of this application, a method for laying a road anti-skid wear layer is provided, characterized by comprising the following steps:

[0020] (1) Raw material configuration: by weight, 80-120 parts of mineral aggregate, 9-110 parts of 4.75mm slow-release de-icing and snow-melting aggregate, 5-15 parts of 2.36mm slow-release de-icing and snow-melting aggregate, 5-8 parts of modified asphalt, and 0.3-0.5 parts of cotton straw cellulose;

[0021] (2) Preparation of anti-skid wear layer mixture: Mix the mineral aggregate heated to 175℃, 4.75mm slow-release de-icing and snow-melting aggregate, and 2.36mm slow-release de-icing and snow-melting aggregate evenly, add them to the heated and melted modified asphalt, stir evenly, and finally add cotton straw cellulose and stir evenly.

[0022] (3) Laying: The anti-skid wear layer mixture is laid on the corresponding road surface and cured.

[0023] Compared with the prior art, the main beneficial technical effects of this application are as follows:

[0024] 1. The composite de-icing salt solution in this application is low in cost, environmentally friendly and pollution-free. It can avoid the current situation of using chlorine-containing de-icing agents such as industrial salt for road de-icing, which causes road corrosion and damage to the surrounding ecological environment. Moreover, it can produce long-term snow removal and ice suppression effects with one application, which can save a lot of manpower and material resources, ensure road safety and smooth traffic in icy and snowy weather conditions, and reduce economic losses caused by icy and snowy weather.

[0025] 2. The actively released snow-melting material in this application is based on shale ceramsite as a snow-melting salt carrier. It undergoes a composite snow-melting salt solution soaking modification treatment, and surfactants are added to increase the penetration depth of the composite snow-melting salt within the pores of the shale ceramsite. A polymer (silicone-acrylic emulsion) modified cement slurry is then used for a slow-release coating treatment, giving it a slow-release effect. The silicone-acrylic emulsion forms a hydrophobic film structure on the surface of the salt-storing ceramsite, thus enabling the salt-storing aggregate to possess a hydrophobic slow-release effect.

[0026] 3. This application incorporates active slow-release de-icing and snow-melting aggregate into the anti-skid abrasion layer material to form an active de-icing and snow-melting anti-skid abrasion layer, which improves the abrasion resistance and high-temperature stability of the mixture, enabling the road surface constructed by the mixture to have excellent abrasion resistance; and under high-temperature conditions, the internal temperature decreases from top to bottom.

[0027] 4. The anti-skid wear layer mixture in this application can actively melt ice and snow, melting as soon as snow falls, preventing road surface icing, and has excellent road performance. It can be used as a preventive protection technology to enhance the service life of newly built heavy-duty asphalt pavements, and can also repair damaged old pavements. It melts ice and snow multiple times with a single construction, maintaining good high and low temperature performance and friction performance throughout the entire service life. It plays an important role in timely snow and ice removal, ensuring road driving safety in winter, and extending the service life of asphalt pavements. Detailed Implementation

[0028] The specific implementation of this application will be described below with reference to the embodiments. However, the following embodiments are only used to illustrate the present invention in detail and do not limit the scope of the present invention in any way.

[0029] Unless otherwise specified, the instruments and equipment used in the following embodiments are conventional instruments and equipment; and the preparation methods used are conventional methods unless otherwise specified.

[0030] The preparation method of the slow-release snow and ice melting aggregate for the road anti-skid wear layer in the following embodiments includes the following steps:

[0031] The raw materials are prepared according to the following weight ratios: sodium acetate 1-5 parts, magnesium peroxide 0.5-2.5 parts, potassium pyrophosphate 1-3 parts, sodium alginate 1-3 parts, monolayer graphene oxide powder 0.1-0.7 parts, nano-SiO2 0.5-1.1 parts; de-icing agent carrier 60-100 parts, surfactant 1-5 parts; polymer emulsion 1-7 parts, cement 30-50 parts, water 80-120 parts, and additives 0.34-0.38 parts.

[0032] (1) Preparation of composite snow melting salt solution: Sodium acetate, magnesium peroxide, potassium pyrophosphate and sodium alginate are dissolved in water at 60°C according to the specified amount. Then, monolayer graphene oxide powder and nano SiO2 are added and dispersed for 2 hours using an ultrasonic disperser.

[0033] (2) Preparation of snow and ice melting aggregate: The crushed shale ceramsite carrier is soaked in a composite snow and ice melting salt solution, and the surfactant PEG-400 is added. The mixture is stirred for 5 minutes and soaked for 4 hours. After drying, the snow and ice melting aggregate is obtained.

[0034] (3) Preparation of slow-release de-icing and snow-melting aggregate: Add different polymer emulsions, cement, water and additives according to the proportion to the cement mortar mixing pot and stir. After 2 minutes to form cement paste, add the dry de-icing and snow-melting aggregate and stir for 2 minutes to slowly coat the de-icing and snow-melting aggregate. Then place it in the curing box for 28 days and obtain slow-release de-icing salt aggregates of 4.75 mm and 2.36 mm by sieving.

[0035] Example 1: A method for laying a road anti-skid wear layer, comprising the following steps:

[0036] (1) Raw material configuration: by weight, 100 parts of mineral aggregate, 9 parts of 4.75mm slow-release melting snow aggregate, 5 parts of 2.36mm slow-release melting snow aggregate, 5 parts of modified asphalt, and 0.4 parts of cotton straw cellulose;

[0037] (2) Preparation of anti-skid wear layer mixture: Mix and stir the mineral aggregate heated to 175℃, 4.75mm slow-release melting ice and snow, and 2.36mm slow-release melting ice and snow aggregate for 30s until uniform. Add the modified asphalt heated and melted at 180℃ and mix and stir for 90s until uniform. Finally, add cotton straw cellulose and stir for 60s to obtain the mixture.

[0038] (3) Laying: The anti-skid wear layer mixture is laid on the corresponding road surface and cured.

[0039] Example 2: A method for laying a road anti-skid wear layer, made from the following raw materials in parts by weight:

[0040] The difference from Example 1 is that: 12 parts of slow-release melting snow and ice aggregate 4.75mm, 6 parts of slow-release melting snow and ice aggregate 2.36mm, and 6 parts of modified asphalt are used. The rest is the same as in Example 1.

[0041] Example 3: A method for laying a road anti-skid wear layer, made from the following raw materials in parts by weight:

[0042] The difference from Example 1 is that: 20 parts of slow-release melting snow and ice aggregate 4.75mm, 10 parts of slow-release melting snow and ice aggregate 2.36mm, and 6 parts of modified asphalt are used. The rest is the same as in Example 1.

[0043] Example 4: A method for laying a road anti-skid wear layer, made from the following raw materials in parts by weight:

[0044] The difference from Example 1 is that: 31 parts of slow-release melting snow and ice aggregate 4.75mm, 15 parts of slow-release melting snow and ice aggregate 2.36mm, and 7 parts of modified asphalt are used. The rest is the same as in Example 1.

[0045] The road anti-skid wear layer mixtures described in Examples 1-4 were subjected to road performance tests and snow melting and de-icing performance tests. Road performance tests included wheel rut deformation tests, low-temperature beam bending tests, and freeze-thaw splitting tests. Snow melting and de-icing performance tests included conductivity measurements of salt release, indoor de-icing experiments, and outdoor de-icing experiments. The road performance and snow melting and de-icing performance of the active slow-release snow melting and de-icing anti-skid wear layer of this invention were compared and analyzed with those of road anti-skid wear layer mixtures without slow-release snow melting and de-icing additives. The test results are shown in Table 1.

[0046] Table 1 Test data of anti-skid wear layer mixture

[0047] .

[0048] As shown in Table 1, the anti-skid wear layer mixture of the present invention has excellent ice-melting and snow-melting effects, and meets the relevant requirements of the Ministry of Transport standard JTGF40 2004 "Technical Specification for Construction of Highway Asphalt Pavement". Its anti-skid wear resistance, high temperature performance and other indicators are significantly higher than those of ordinary anti-skid wear layer mixtures, indicating that the active slow-release ice and snow melting anti-skid wear layer mixture of the present invention has superior road performance.

[0049] The present application has been described in detail above with reference to the embodiments; however, those skilled in the art will understand that, without departing from the concept of the present application, the specific parameters in the above embodiments can be changed, or the relevant materials and method steps can be equivalently substituted, thereby forming multiple specific embodiments, all of which are common variations of the present application, and will not be described in detail here.

Claims

1. A slow-release ice-melting aggregate for use in a skid-resistant wearing course, characterized in that, It is made by mixing the following ingredients in parts by weight: Sodium acetate 1-5 parts, magnesium peroxide 0.5-2.5 parts, potassium pyrophosphate 1-3 parts, sodium alginate 1-3 parts, monolayer graphene oxide powder 0.1-0.7 parts, nano-SiO2 0.5-1.1 parts; 60-100 parts of de-icing agent carrier, 1-5 parts of surfactant polyethylene glycol; 1-7 parts silicone-acrylic emulsion, 30-50 parts cement, 80-120 parts water, and 0.34-0.38 parts alcohol ester twelve as an additive; The de-icing agent carrier is crushed shale ceramsite; The preparation method of the slow-release snow-melting aggregate includes the following steps: dissolving sodium acetate, magnesium peroxide, potassium pyrophosphate, and sodium alginate in water at 50℃~70℃ in proportion, adding monolayer graphene oxide powder and nano-SiO2, dispersing for 2 hours to obtain a composite snow-melting salt solution; immersing the snow-melting agent carrier in the composite snow-melting salt solution, adding the surfactant polyethylene glycol, stirring for 5 minutes, soaking for 4 hours, and then drying to obtain snow-melting aggregate; stirring silicone acrylic emulsion, cement, water, and additive alcohol ester twelve in proportion, and slowly coating and curing the snow-melting aggregate, and obtaining slow-release snow-melting salt aggregates with particle sizes of 4.75mm and 2.36mm respectively by sieving.

2. The slow-release ice-melting snow aggregate according to claim 1, characterized in that, Made from the following parts by weight of raw materials: Sodium acetate 2-4 parts, magnesium peroxide 1-2 parts, potassium pyrophosphate 1.5-2.5 parts, sodium alginate 1.5-2.5 parts, monolayer graphene oxide powder 0.2-0.5 parts, nano-SiO2 0.6-0.9 parts; de-icing agent carrier 60-100 parts, surfactant polyethylene glycol 2-4 parts; silicone acrylic emulsion 2-5 parts, cement 30-50 parts, water 90-110 parts, additive alcohol ester twelve 0.34-0.38 parts.

3. The method for preparing the slow-release snow and ice melting aggregate according to claim 1, characterized in that, Includes the following steps: (1) Prepare each raw material according to the raw material ratio described in claim 1, and set aside for later use; (2) Preparation of composite snow melting salt solution: Sodium acetate, magnesium peroxide, potassium pyrophosphate and sodium alginate are dissolved in water at 50℃~70℃ in proportion, then monolayer graphene oxide powder and nano SiO2 are added and dispersed for 2h to obtain the solution. (3) Preparation of snow melting aggregate: The snow melting agent carrier is soaked in the composite snow melting salt solution, the surfactant polyethylene glycol is added, the mixture is stirred for 5 minutes, soaked for 4 hours, and then dried to obtain snow melting aggregate; (4) Preparation of slow-release de-icing and snow-melting aggregate: Silicon-acrylic emulsion, cement, water and additive alcohol ester twelve are stirred in proportion, and the de-icing and snow-melting aggregate is coated and cured in a slow-release manner. Slow-release de-icing salt aggregate with particle size of 4.75 mm and 2.36 mm is obtained by sieving.

4. A method of laying a road skid-resistant wearing course, characterised by, Includes the following steps: (1) Raw material configuration: by weight, 80-120 parts of mineral aggregate, 9-31 parts of the 4.75mm slow-release de-icing and snow-melting aggregate prepared in claim 3, 5-15 parts of the 2.36mm slow-release de-icing and snow-melting aggregate prepared in claim 3, 5-8 parts of modified asphalt, and 0.3-0.5 parts of cotton straw cellulose; (2) Preparation of anti-skid wear layer mixture: Mix the mineral aggregate heated to 175℃, 4.75mm slow-release de-icing and snow-melting aggregate, and 2.36mm slow-release de-icing and snow-melting aggregate evenly, add them to the heated and melted modified asphalt, stir evenly, and finally add cotton straw cellulose and stir evenly. (3) Laying: Lay the anti-skid wear layer mixture on the corresponding road surface and cure it.