Road color coating material and preparation method thereof

Abstract

The application discloses a kind of road color coating materials and preparation method thereof, belong to road engineering field.The coating material is prepared from specific proportion of main solvent one, asphalt binder, functional filler, modified masterbatch, stabilizer, drying agent, and the coating material test's Brookfield viscosity is 2000-4000cPs at 20 DEG C.Compared with prior art, the coating material of the application can greatly improve the performance of urban color pavement, and implementation process is simple, stable in performance, with good popularization and application value.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of road engineering, and particularly provides a road color coating material and a preparation method thereof. BACKGROUND

[0002] In order to beautify the environment, distinguish functional areas, and prompt special road sections, color pavements are often set in non-motor vehicle lanes and intersection waiting areas of urban roads. Existing color pavement construction methods include color asphalt pavement and color micro-surfacing pavement.

[0003] The thickness of color asphalt pavement is required to be more than 3 cm, and thin layers cannot be constructed, which is high in cost and poor in effect after application.

[0004] Color micro-surfacing pavement is an ultra-thin layer mixture composed of modified emulsified asphalt, aggregate of certain gradation, mineral powder, water and additives, which is spread on the original asphalt pavement after being uniformly stirred. Although it has a certain wear resistance at the beginning, it has large driving noise, poor durability, poor adhesion to the underlying pavement, unstable demulsification time, and great difficulty in maintenance after local damage. SUMMARY

[0005] The present application is directed to the deficiencies of the prior art, and provides a road color coating material and a preparation method thereof, which can greatly improve the wear resistance and anti-seepage performance of the pavement, and are simple in implementation process and stable in performance.

[0006] The technical task of the present application is achieved in the following manner: a road color coating material is mainly made of the following raw materials in weight ratio:

[0007]

[0008] The main solvent one is an organic solvent;

[0009] The asphalt binder is low-grade and high-softening-point asphalt;

[0010] The coating material has a Brookfield viscosity of 2000-4000 cPs at 20℃.

[0011] The weight ratio of the raw materials is preferably:

[0012]

[0013] As a preferred embodiment, the modified masterbatch is made of the main solvent two, the modifier, the anti-seepage agent and the coupling agent,

[0014] The weight ratio of the main solvent two, the modifier, the anti-seepage agent and the coupling agent is (30-55):(8-17):(7-19):(4-11), and is preferably (40-55):(12-17):(12-19):(8-11);

[0015] The main solvent two is a mixture of one or more of 120# solvent oil, 140# solvent oil, 200# solvent oil, light diesel oil, and gasoline;

[0016] The modifier is preferably a mixture of one or more of styrene-butadiene copolymer, styrene-butadiene-styrene triblock copolymer, and chloroprene latex;

[0017] The anti-permeation agent is an unsaturated fatty acid substance with a melting point of ≤20°C and a number average molecular weight of ≤400, and is used to improve the interface adhesion, and is preferably a mixture of one or more of oleic acid, palmitoleic acid, and soybean oleic acid;

[0018] The coupling agent is a vinyl silane coupling agent.

[0019] Further, the preparation method of the modified masterbatch is preferably:

[0020] The main solvent two and the anti-permeation agent are stirred at 30-60°C until completely dissolved, then the coupling agent and the modifier are added in sequence, and after a certain period of stirring, the temperature is naturally reduced to room temperature, and then ultrasonic treatment is performed for a certain period of time to obtain the activated modified masterbatch.

[0021] As a preferred, the preparation process of the modified masterbatch is carried out under nitrogen protection, and the treatment time of ultrasonic treatment is preferably 10-30min, and particularly preferably 15-25min; the vibration frequency is preferably 30-40KHz, and particularly preferably 23-27KHz.

[0022] As a preferred, the main solvent one is a mixture of one or more of 120# solvent oil, 140# solvent oil, 200# solvent oil, light diesel oil, and gasoline.

[0023] In order to ensure the stability of the coating material under high temperature conditions, as a preferred, the asphalt binder has a penetration of ≤50 (0.1mm) at 25°C and a softening point of ≥65°C, and is particularly preferably a mixture of one or more of rock asphalt, Trinidad lake asphalt, 50# asphalt, 40# asphalt, 30# asphalt, 20# asphalt, and 10# asphalt.

[0024] As a preferred, the functional filler is a powder ground from basic rock or ultrabasic rock, and has a fineness of not less than 200 mesh, and is particularly preferably a mixture of one or more of ground marble, limestone, basalt, granite, dolomite, talc powder, carborundum, or steel slag powder.

[0025] As a preferred, the stabilizer is wood cellulose with a fiber length of 100-500 microns, and the drier is a mixture of one or both of naphthenic acid soap and sulfite (such as sodium sulfite, magnesium sulfite, etc.).

[0026] The colorant is a mixture of one of iron oxide, manganese dioxide, chromium oxide, phthalocyanine blue, ultramarine blue, iron oxide red powder and titanium dioxide white powder pigment, and the weight ratio of titanium dioxide white powder in the dyeing agent is ≤30%.

[0027] The further technical task of the present application is to provide a preparation method of the road color coating material.

[0028] The preparation method of the road color coating material is characterized in that the preparation process of the coating material is carried out in a closed container under nitrogen protection, comprising the following steps:

[0029] S1. The main solvent two and the anti-permeation agent are stirred at 30-60℃ until completely dissolved, then the coupling agent and the modifier are added in sequence, and after a certain time of continuous stirring, it is naturally reduced to room temperature, and then ultrasonic treatment is carried out for a certain time to obtain the activated modified masterbatch;

[0030] S2. The asphalt binder is heated to 120-150℃, and then cooled to maintain a flowable and transportable state to obtain component A;

[0031] S3. The main solvent one is mixed and stirred uniformly with the modified masterbatch at a temperature of 30-60℃ to obtain component B;

[0032] S4. Component A is slowly added to component B for mixing, then the stabilizer, the quick-drying agent, the functional filler and the colorant are added in sequence, and the mixture is stirred uniformly to obtain the asphalt pavement coating material,

[0033] The weight ratio of each raw material is as follows:

[0034]

[0035]

[0036] The main solvent is an organic solvent;

[0037] The asphalt binder is a low-grade, high-softening-point asphalt;

[0038] The Brookfield viscosity of the coating material at 20℃ is 2000-4000cPs.

[0039] In order to make the coating material meet the index requirements of viscosity and drying time, the following methods can be used for regulation and control during preparation:

[0040] (1) At temperature 20℃, the viscosity of the prepared asphalt pavement coating material is tested by Bookefield (main shaft No. 6), if the viscosity is higher than the control index of the required material, the main solvent one or the main solvent two is added in proportion of 1% of the total amount of the prepared asphalt pavement coating material, and stirred uniformly, and the required viscosity is reached through repeated viscosity tests; if the viscosity of the material is lower than the control index, the functional filler is added in proportion of 1% of the total amount of the prepared asphalt pavement coating material, and stirred uniformly, and the required viscosity is reached through repeated viscosity tests.

[0041] (2) The coating material is subjected to pre-laying test, if the drying time does not meet the requirements, the drying agent is added in proportion of 1% of the total amount of the coating material before use until the use requirements are met.

[0042] Table 1 drying time and environmental temperature requirements

[0043] 40℃ 30℃ 20℃ 15℃ 30-45 min about 60 min about 90 min more than 180 min

[0044] The pavement repair coating material can be sprayed by using conventional high-pressure asphalt coating spraying equipment, and can be directly sprayed on the lower pavement structure layer, or the lower pavement structure can be pretreated by shot blasting before spraying.

[0045] The spraying amount is preferably 0.6-1.3Kg / m 2 .

[0046] The optimal spraying amount under different pavement types and disease conditions is shown in Table 2.

[0047] Table 2 optimal spraying amount under different pavement types and disease conditions

[0048] Pavement type Main disease description Spread range (Kg / m 2 ) <!-- 3 -->]]> AC asphalt concrete pavement Polish, loose, asphalt film loss 0.6～0.85 SMA asphalt concrete pavement Loose, asphalt film loss 0.9～1.3 Asphalt macadam pavement Loose 1.0～1.3 AK asphalt concrete pavement Loose, asphalt film loss 1.0～1.3

[0049] In the implementation process, the skid resistance and texture of the asphalt pavement can be divided into three states of "rough", "moderate" and "smooth", and generally, the lower limit of the recommended range of the spraying amount is used for the pavement with the state of "smooth".

[0050] The spraying pressure of the pump of the high-pressure spraying vehicle is preferably 18-22Kg, the flow control of the mixture is preferably 320-350Kg / min, the driving speed is preferably controlled at 7-9Km / h, during spraying, the spraying equipment should keep the speed and spraying amount stable, and the spraying should be uniform in the whole spraying width range. The spraying pipe of the spraying vehicle is preferably fixed at a height of 350-450mm from the ground, the distance between adjacent oil nozzles is preferably 200-400mm, the spraying width of the oil nozzles should overlap each other, the material at the same position is sprayed by two or three oil nozzles, and white stripes should not appear.

[0051] Compared with the prior art, the road color coating material and the preparation method thereof have the following outstanding beneficial effects:

[0052] (I) The adopted asphalt binder has the characteristics of low grade, high softening point, good compatibility with the main solvent, good workability during construction, shortened drying time after construction, and good high-temperature stability during use;

[0053] (II) The adopted environmentally-friendly organic solvent has high solubility and post-work volatility, and the hydrophobicity and water stability are improved compared with the traditional emulsified "water-based" asphalt-based coating in the market, and the environmental protection is improved compared with the traditional aromatic hydrocarbon organic solvent;

[0054] (III) The activated modified masterbatch obtained by a specific method has high adhesion strength, and excellent weather resistance, anti-seepage and durability;

[0055] (IV) The functional filler is the main component of the coating material, and can be well combined with the asphalt binder under the action of the activated modified masterbatch. The specific mechanism is as follows: the double bonds in the unsaturated fatty acid in the modified masterbatch are cross-linked and polymerized to form oligomeric amphiphilic surface active substances in the ultrasonic activation process, and the long-chain part can be well fused with the asphalt colloid, forming a sol-gel type structure, and the hydrophilic part can be fused with the inorganic salt of the functional filler. Therefore, the presence of the unsaturated fatty acid enhances the close combination between the functional filler and the asphalt binder, thereby improving the wear resistance, skid resistance and other auxiliary functions of the coating material;

[0056] (V) The lignocellulose is used as a stabilizer. Because of its excellent flexibility and dispersibility, the lignocellulose can form a three-dimensional network structure after being mixed with the asphalt binder, further increasing the adhesion between the asphalt binder and the functional filler, avoiding delamination and segregation, and improving the stability and durability of the coating material;

[0057] (VI) The addition of the catalyst drier can accelerate the film formation speed and curing of the asphalt mixture coating material when the coating material acts on the damaged asphalt pavement;

[0058] (VII) When the coating material acts on the damaged asphalt pavement, the various components are uniformly dispersed on the exposed aggregate surface to effectively protect the exposed aggregate surface. The functional filler and the asphalt binder in the coating material form a high-stiffness asphalt mastic on the exposed aggregate surface, improving the wear resistance of the pavement. The alkoxy group of the silane coupling agent in the coating material reacts with the carbonic acid group on the surface of the functional filler to form a surface film attached to the exposed aggregate surface, further enhancing the close fusion between the coating material and the exposed aggregate;

[0059] (Eight) the interaction of each material in the coating material not only makes the coating material have stable storage, uniform spraying, fast solvent volatilization after spraying, good adhesion (adhesion level 5), excellent wear resistance (service life 6-10 years), but also can ensure that the coating material has appropriate fluidity (Brookfield viscosity at 20℃ is 2000-4000 cPs), can realize spraying operation, reduce construction difficulty and improve work efficiency. DETAILED DESCRIPTION

[0060] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application will be further described below in conjunction with specific embodiments, but not as a limitation of the present application, that is, the described embodiments are part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.

[0061] Example 1: Preparation of modified masterbatch

[0062] Table 3: Material ratio and parameter control of modified masterbatch

[0063]

[0064] Material description:

[0065] Oleic acid: molecular weight 282.46, melting point 13-14℃;

[0066] Palmitoleic acid: molecular weight 254.41, melting point 0.5℃;

[0067] Soybean oil acid: 280≤molecular weight≤284, melting point 15℃.

[0068] Preparation method

[0069] The formula amount of the main solvent two and the anti-permeation agent were added to a small reaction kettle, stirred at 50℃ for 20min to make them completely dissolved, then the silane coupling agent and the modifier were added in turn, the temperature was maintained and continued to be stirred for 40min, then it was naturally reduced to room temperature, and then it was ultrasonically treated for a certain time to obtain the activated modified masterbatch, which was respectively recorded as masterbatch 1, masterbatch 2, masterbatch 3, masterbatch 4, masterbatch 5, masterbatch 6, masterbatch 7, masterbatch 8. The whole test process was carried out in a closed reaction container, and nitrogen was filled before the test to remove oxygen.

[0070] Example 2: Preparation of road color coating material

[0071] Table 4: Material ratio of coating material

[0072]

[0073] Material description:

[0074] Qingchuan rock asphalt: 3 (0.1 mm) at 25℃, softening point 220℃;

[0075] 50# asphalt: 45 (0.1 mm) at 25℃, softening point 67℃;

[0076] 40# asphalt: 38 (0.1 mm) at 25℃, softening point 70℃;

[0077] 30# asphalt: 28 (0.1 mm) at 25℃, softening point 72℃.

[0078]

Preparation method

[0079] A1, heating the asphalt binder to 135℃, and then cooling to maintain a flow transportable state to obtain component A;

[0080] A2. Mix and stir the main solvent I and the modified masterbatch at a temperature of 50℃ to obtain component B;

[0081] A3. Slowly add component A to the main stirrer of component B, then add stabilizer, drier, functional filler, colorant in turn, and stir uniformly to obtain the final asphalt pavement coating material, denoted as Example One, Example Two, Example Three, Example Four, Example Five, Example Six, Example Seven, and Example Eight.

[0082] Steps A1-A3 are carried out in a closed container under nitrogen protection.

[0083]

Finished product control

[0084] (1) At a temperature of 20℃, use Bookefield (main shaft No. 6) to test the viscosity of the prepared asphalt pavement long-acting hydrophobic coating material. If the viscosity is higher than the control index of the required material, add main solvent I or main solvent II in a proportion of 1% of the total amount of the prepared asphalt pavement long-acting hydrophobic coating material, stir uniformly, and through repeated viscosity tests, until the desired viscosity is reached. If the viscosity of the material is lower than the control index, add functional filler in a proportion of 1% of the total amount of the prepared asphalt pavement long-acting hydrophobic coating material, stir uniformly, and through repeated viscosity tests, until the desired viscosity is reached.

[0085] (2) Perform a pre-laying test on the coating material. If the drying time does not meet the requirements, add a drier in a proportion of 1% of the total amount of the coating material before use until the use requirements are met.

[0086]

Performance measurement

[0087] The coating material obtained by each of the above preparation methods is poured into a container tank of a spraying device, stirred uniformly, and then subjected to a road surface spreading test, with a spraying amount of 1 Kg / m 2 .

[0088] The control parameters are:

[0089] The working vehicle: Halik-CH-32000I professional high-pressure spraying vehicle;

[0090] Spraying flow: 347 Kg / min;

[0091] Spraying pressure: 20 Kg;

[0092] Working speed: 8 Km / h;

[0093] The height of the spreading pipe from the ground: 400 mm;

[0094] The distance between adjacent oil nozzles: 300 mm.

[0095]

Detection results

[0096] Table 5. Detection results

[0097]

[0098] From the above experimental data in Table 5, it can be seen that the various properties of the coating materials of all the above examples meet the construction quality requirements. Among them, the Brookfield viscosity data (2400-3300 cPs) of the coating materials indicate that the materials have appropriate fluidity and can realize continuous spraying operation; the construction depth, friction coefficient, bonding strength and wear resistance data are all far superior to the standard quality requirements, indicating that the road anti-skid and wear resistance performance are simultaneously improved, greatly prolonging the service life of the road surface; the water permeability coefficient test results show that the hydrophobic performance of the road surface is improved. The drying time data show that the road can be opened to traffic in 1 hour at 30℃, having less impact on road traffic, and after opening to traffic, the color is bright and the visual guiding effect is significant. In summary, the road color coating material and the preparation method thereof provided by the present application not only increase the colorful color of the road, but also greatly improve the road anti-skid, hydrophobic and wear resistance properties, improve the comprehensive performance of the road surface, prolong the service life of the road surface, and the implementation process is simple and the performance is stable.

Claims

1. A road-use colored coating material, characterized in that... Made from the following raw materials in the following weight ratio: The primary solvent is a mixture of one or more substances selected from 120# solvent oil, 140# solvent oil, 200# solvent oil, light diesel oil, and gasoline. The asphalt binder is a mixture of one or more substances selected from rock asphalt, Trinidad Lake asphalt, 50# asphalt, 40# asphalt, 30# asphalt, 20# asphalt and 10# asphalt; The functional filler is a powder made from basic or ultrabasic rock, with a fineness of not less than 200 mesh. The modified masterbatch is prepared from main solvent II, a modifier, an antipermeable agent, and a coupling agent. Main solvent II and the antipermeable agent are stirred at 30-60℃ until completely dissolved. Then, the coupling agent and the modifier are added sequentially, and stirring continues for a certain time. The mixture is then allowed to cool naturally to room temperature, followed by ultrasonic treatment for a certain time to obtain the activated modified masterbatch. The weight ratio of the main solvent, modifier, anti-permeability agent, and coupling agent is (30-55):(8-17):(7-19):(4-11). The second main solvent is a mixture of one or more substances selected from 120# solvent oil, 140# solvent oil, 200# solvent oil, light diesel oil, and gasoline; The modifier is one or a mixture of several of the following: styrene-butadiene copolymer, styrene-butadiene-styrene triblock copolymer, and chloroprene latex; The antipermeability agent is an unsaturated fatty acid substance with a melting point ≤20℃ and a number average molecular weight ≤400, and is a mixture of one or more substances selected from oleic acid, palmitic acid and soybean oleic acid. The coupling agent is a vinylsilane-based coupling agent; The stabilizer is lignocellulose; The drying agent is one or a mixture of two of naphthenic acid soap and sulfite; The Brinell viscosity of the coating material at 20°C is 2000-4000 cPs.

2. The road-use colored coating material according to claim 1, characterized in that: The preparation process of the modified masterbatch is carried out under nitrogen protection, and the ultrasonic treatment time is 10-30 min with a vibration frequency of 30-40 kHz.

3. The road-use colored coating material according to claim 1 is characterized in that: The functional filler includes a mixture of one or more substances selected from ground marble, limestone, basalt, granite, dolomite, talc, corundum, or steel slag powder.

4. The road-use colored coating material according to claim 1, characterized in that: The colorant is a mixture of one of the following powders: iron oxide, manganese dioxide, chromium oxide, phthalocyanine blue, ultramarine blue, and iron oxide red, and titanium dioxide pigment, wherein the weight ratio of titanium dioxide in the colorant is ≤30%.

5. A method for preparing road-use colored coating materials, characterized in that: The preparation process of the coating material is carried out under nitrogen protection in a sealed container, and includes the following steps: S1. The main solvent and the anti-permeability agent are stirred at 30-60℃ until completely dissolved. Then, the coupling agent and the modifier are added in sequence. After stirring for a certain period of time, the mixture is allowed to cool naturally to room temperature. Then, it is ultrasonically treated for a certain period of time to obtain the activated modified masterbatch. S2. Heat the asphalt binder to 120-150℃, then cool it to a state that maintains flowability and transportability to obtain component A; S3. Mix and stir the main solvent and the modified masterbatch at a temperature of 30-60℃ to obtain component B; S4. Mix components A and B, then add stabilizer, drier, functional filler, and colorant in sequence, and stir until homogeneous to obtain the coating material. The weight ratio of each raw material is as follows: The primary solvent is a mixture of one or more substances selected from 120# solvent oil, 140# solvent oil, 200# solvent oil, light diesel oil, and gasoline. The asphalt binder is a mixture of one or more substances selected from rock asphalt, Trinidad Lake asphalt, 50# asphalt, 40# asphalt, 30# asphalt, 20# asphalt and 10# asphalt; The functional filler is a powder made from basic or ultrabasic rock, with a fineness of not less than 200 mesh. In the modified masterbatch, The weight ratio of the main solvent, modifier, anti-permeability agent, and coupling agent is (30-55):(8-17):(7-19):(4-11). The second main solvent is a mixture of one or more substances selected from 120# solvent oil, 140# solvent oil, 200# solvent oil, light diesel oil, and gasoline; The modifier is one or a mixture of several of the following: styrene-butadiene copolymer, styrene-butadiene-styrene triblock copolymer, and chloroprene latex; The antipermeability agent is an unsaturated fatty acid substance with a melting point ≤20℃ and a number average molecular weight ≤400, and is a mixture of one or more substances selected from oleic acid, palmitic acid and soybean oleic acid. The coupling agent is a vinylsilane-based coupling agent; The stabilizer is lignocellulose; The drying agent is one or a mixture of two of naphthenic acid soap and sulfite; The Brinell viscosity of the coating material at 20°C is 2000-4000 cPs.

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