Asphalt composition, high-temperature-resistant colored asphalt and preparation method of high-temperature-resistant colored asphalt

Abstract

The invention relates to the technical field of asphalt materials, and particularly discloses an asphalt composition, high-temperature-resistant colored asphalt and a preparation method of the high-temperature-resistant colored asphalt. The asphalt composition provided by the invention comprises the following components in parts by weight: 60-80 parts of base asphalt, 3-5 parts of pigment, 2-4 parts of a temperature-resistant additive, 1-3 parts of a dispersing agent and 1-2 parts of an antioxidant, the temperature-resistant auxiliary agent is prepared from phenyl silicone oil, silicone master batch and zinc borate according to the weight ratio of 1: (0.2 to 0.6): (0.05 to 0.2); the antioxidant is selected from one or more of N-phenyl-1-naphthylamine, N-isopropyl-2-naphthylamine, hydroxyphenylethane, 2, 6-di-tert-butyl-4-methylphenol and 3, 5-di-tert-butyl-2-hydroxybenzoic acid, and the antioxidant is selected from one or more of N-phenyl-1-naphthylamine, N-isopropyl-2-naphthylamine, hydroxyphenylethane, 2, 6-di-tert-butyl-4-methylphenol and 3, 5- The invention also provides high-temperature-resistant colored asphalt prepared from the asphalt composition. The high-temperature-resistant colored asphalt has the advantages of excellent high-temperature resistance, good color stability and the like, and the service life of the colored asphalt can be greatly prolonged.

Description

Technical Field

[0001] This application relates to the technical field of asphalt materials, and specifically relates to an asphalt composition, a high-temperature resistant colored asphalt and a preparation method thereof. Background Art

[0002] In recent years, colored asphalt has attracted much attention due to its unique decorative effect and good visual guiding function, and is widely used in sidewalks, bicycle lanes, parking lots and other occasions. This new material can not only enhance the beauty of the city, but also effectively identify the functional uses of different areas, improving traffic safety and comfort. However, despite the broad application prospects of colored asphalt, there are still some problems in actual use.

[0003] Currently, the common colored asphalt on the market mainly realizes color change by adding color powder pigments to hot mix asphalt mixtures. Generally, in order to improve the color stability, specific types of pigments and antioxidants are added to the asphalt in the industry; in addition, in order to further enhance the high-temperature resistance of the asphalt, additives such as polymers or ceramic particles are also introduced. However, although the above methods can improve the performance of colored asphalt to a certain extent, the color of colored asphalt is still prone to fade under high-temperature conditions, and long-term exposure of colored asphalt to ultraviolet rays and the atmospheric environment will also result in poor color stability and durability, seriously affecting the actual application effect of colored asphalt.

[0004] Therefore, developing a colored asphalt that can both withstand high temperatures and has good color stability has become an urgent need in the industry. Summary of the Invention

[0005] In order to improve the high-temperature resistance and color stability of colored asphalt, this application provides an asphalt composition, a high-temperature resistant colored asphalt and a preparation method thereof.

[0006] In the first aspect, the asphalt composition provided by this application adopts the following technical solution: An asphalt composition, comprising the following components in parts by weight: 60-80 parts of base asphalt, 3-5 parts of pigment, 2-4 parts of temperature-resistant additive, 1-3 parts of dispersant, 1-2 parts of antioxidant; The temperature-resistant additive is phenyl silicone oil, silicone masterbatch and zinc borate with a weight ratio of 1:(0.2-0.6):(0.05-0.2).

[0007] The present application provides an asphalt composition. In this asphalt composition, phenyl silicone oil has good thermal stability and lubricity, and can resist decomposition and evaporation at high temperatures, thereby ensuring that the asphalt is not easily softened and flowing under high-temperature conditions; the silicone masterbatch can form a protective film on the surface of the asphalt, thereby reducing the damage of ultraviolet rays to the asphalt material, improving the weather resistance of the colored asphalt, and effectively preventing the colored asphalt from fading, aging, etc. under the environment of wind, sun and rain; zinc borate has excellent flame retardancy and high temperature resistance. Under high-temperature conditions, zinc borate will decompose to produce substances such as zinc oxide and boric acid. These decomposition products can be closely combined to form a dense and firm protective film, thereby blocking the transmission of oxygen and heat, reducing the temperature inside the colored asphalt, and slowing down the fading rate of the colored asphalt. Through experimental exploration, it is found in the present application that by using the above three substances as the heat-resistant additives for colored asphalt and controlling their weight ratios within the above ranges, the heat resistance, anti-aging ability and color stability of the colored asphalt under high-temperature environments can be significantly improved, and the service life of the colored asphalt can be extended.

[0008] Optionally, the heat-resistant additive is phenyl silicone oil, silicone masterbatch and zinc borate with a weight ratio of 1:(0.3 - 0.5):(0.1 - 0.15).

[0009] In the present application, through experimental exploration, it is found that further controlling the weight ratio of the silicone masterbatch and zinc borate in the heat-resistant additive within the above ranges can effectively improve the color retention ability and anti-aging performance of the colored asphalt under high-temperature environments, significantly reduce the color fading and performance degradation caused by temperature rise, and extend the service life of the colored asphalt.

[0010] In some embodiments, the weight ratio of the phenyl silicone oil, silicone masterbatch and zinc borate can be 1:(0.2 - 0.3):0.1, 1:(0.2 - 0.4):0.1, 1:(0.2 - 0.5):0.1, 1:(0.2 - 0.6):0.1, 1:(0.3 - 0.4):0.1, 1:(0.3 - 0.5):0.1, 1:(0.3 - 0.6):0.1, 1:(0.4 - 0.5):0.1, 1:(0.4 - 0.6):0.1, 1:(0.5 - 0.6):0.1, 1:0.4:(0.05 - 0.1), 1:0.4:(0.05 - 0.15), 1:0.4:(0.05 - 0.2), 1:0.4:(0.1 - 0.15), 1:0.4:(0.1 - 0.2) or 1:0.4:(0.15 - 0.2).

[0011] In a specific embodiment, the weight ratio of the phenyl silicone oil, silicone masterbatch, and zinc borate can also be 1:0.2:0.1, 1:0.3:0.1, 1:0.4:0.1, 1:0.5:0.1, 1:0.6:0.1, 1:0.4:0.05, 1:0.4:0.15, or 1:0.4:0.2.

[0012] Optionally, the dispersant is selected from one or more of polyhydric alcohol polyether phosphate, sodium dodecyl sulfate, sodium benzoate, polyethylene wax, and styrene.

[0013] In this application, the dispersant can ensure that the color pigments are evenly distributed throughout the asphalt system, avoiding color non-uniformity and fading caused by excessive local concentration.

[0014] Optionally, the antioxidant is selected from one or more of N-phenyl-1-naphthylamine, N-isopropyl-2-naphthylamine, hydroxyethylbenzene, 2,6-di-tert-butyl-4-methylphenol, and 3,5-di-tert-butyl-2-hydroxybenzoic acid.

[0015] Optionally, the antioxidant is a mixture of N-phenyl-1-naphthylamine and 3,5-di-tert-butyl-2-hydroxybenzoic acid.

[0016] Optionally, the antioxidant is N-phenyl-1-naphthylamine and 3,5-di-tert-butyl-2-hydroxybenzoic acid with a weight ratio of 1:(1 - 3).

[0017] Optionally, the antioxidant is N-phenyl-1-naphthylamine and 3,5-di-tert-butyl-2-hydroxybenzoic acid with a weight ratio of 1:(1.5 - 2.5).

[0018] This application further uses N-isopropyl-2-naphthylamine and 3,5-di-tert-butyl-2-hydroxybenzoic acid as antioxidants and controls their weight portions within the above range, which can significantly improve the antioxidant ability and weather resistance of the colored asphalt, enabling it to maintain stable mechanical properties and color performance even when long-term exposed to ultraviolet rays and the atmospheric environment, and preventing the aging and oxidation fading of the colored asphalt.

[0019] In some embodiments, the weight ratio of N-phenyl-1-naphthylamine and 3,5-di-tert-butyl-2-hydroxybenzoic acid can be 1:(1 - 1.5), 1:(1 - 2), 1:(1 - 2.5), 1:(1 - 3), 1:(1.5 - 2), 1:(1.5 - 2.5), 1:(1.5 - 3), 1:(2 - 2.5), 1:(2 - 3), or 1:(2.5 - 3).

[0020] In a specific embodiment, the N-phenyl-1-naphthylamine and 3,5-di-tert-butyl-2-hydroxybenzoic acid can also be in a ratio of 1:1, 1:1.5, 1:2, 1:2.5 or 1:3.

[0021] Optionally, the base asphalt is 70# matrix asphalt.

[0022] In a second aspect, the present application provides a high-temperature resistant colored asphalt, which is prepared from an asphalt composition.

[0023] In a third aspect, the present application provides a method for preparing the high-temperature resistant colored asphalt, comprising the following steps: Add the temperature-resistant auxiliary, dispersant, and antioxidant to the base asphalt in sequence, stir at 130 - 150 °C for 30 - 60 min; then add the pigment and stir for 10 - 20 min to obtain the high-temperature resistant colored asphalt.

[0024] In summary, the present application has the following beneficial effects: 1. The present application provides an asphalt composition, which uses base asphalt as the main raw material, adds pigment, temperature-resistant auxiliary, dispersant, and antioxidant, and uses phenyl silicone oil, silicone masterbatch, and zinc borate with a weight ratio of 1:(0.2 - 0.6):(0.05 - 0.2) as the temperature-resistant auxiliary, thereby preparing a high-temperature resistant colored asphalt with good heat resistance, anti-aging performance, and color stability.

[0025] 2. The present application further selects a mixture of N-phenyl-1-naphthylamine and 3,5-di-tert-butyl-2-hydroxybenzoic acid as the antioxidant, and the obtained high-temperature resistant colored asphalt has better antioxidant ability and weather resistance, and can still maintain stable mechanical properties and color performance after being exposed to ultraviolet rays and the atmospheric environment for a long time. Specific Embodiments

[0026] The present application provides an asphalt composition, comprising the following components in parts by weight: 60 - 80 parts of base asphalt, 3 - 5 parts of pigment, 2 - 4 parts of temperature-resistant additive, 1 - 3 parts of dispersant, and 1 - 2 parts of antioxidant; wherein, the temperature-resistant additive is phenyl silicone oil, silicone masterbatch and zinc borate with a weight ratio of 1:(0.2 - 0.6):(0.05 - 0.2); the dispersant is selected from one or more of polycarbonol polyether phosphate, sodium dodecyl sulfate, sodium benzoate, polyethylene wax and styrene; the antioxidant is selected from one or more of N-phenyl-1-naphthylamine, N-isopropyl-2-naphthylamine, hydroxyethylbenzene, 2,6-di-tert-butyl-4-methylphenol and 3,5-di-tert-butyl-2-hydroxybenzoic acid. Further, the temperature-resistant additive is phenyl silicone oil, silicone masterbatch and zinc borate with a weight ratio of 1:(0.3 - 0.5):(0.1 - 0.15); the antioxidant is N-phenyl-1-naphthylamine and 3,5-di-tert-butyl-2-hydroxybenzoic acid with a weight ratio of 1:(1.5 - 2.5).

[0027] The present application provides a high-temperature resistant colored asphalt, and its preparation method comprises the following steps: sequentially adding the temperature-resistant additive, dispersant and antioxidant into the base asphalt, stirring at 130 - 150 °C for 30 - 60 min; then adding the pigment and stirring for 10 - 20 min to obtain the high-temperature resistant colored asphalt.

[0028] In the present application, the pigment is iron oxide green pigment, purchased from Shijiazhuang Hualang Mineral Products Trading Co., Ltd.; the component of phenyl silicone oil is phenyl polydimethylsiloxane, with the brand number CSGE-Y4505; the chemical component of silicone masterbatch is silicone + silicone resin, with the model number GTML-011; zinc borate and N-phenyl-1-naphthylamine are purchased from Macklin; the CAS number of 3,5-di-tert-butyl-2-hydroxybenzoic acid is 19715-19-6; the CAS number of 2,6-di-tert-butyl-4-methylphenol is 128-37-0. The raw materials, reagents, solvents, etc. used in the present application can all be obtained through commercial purchase.

[0029] The present application will be further described in detail below in conjunction with examples and performance detection tests.

[0030] Examples 1 - 3 Examples 1 - 3 respectively provide a high-temperature resistant colored asphalt.

[0031] The differences between the above examples lie in: the addition amounts of each component in the high-temperature resistant colored asphalt, as specifically shown in Table 1 below.

[0032] The preparation methods of the high-temperature resistant colored asphalt provided in Examples 1-3 include the following steps: Add temperature-resistant additives, dispersants, and antioxidants to the base asphalt in sequence, stir at 130-150°C for 30-60 minutes; then add pigments and stir for 10-20 minutes to obtain the high-temperature resistant colored asphalt. The temperature-resistant additives used in Examples 1-3 are phenyl silicone oil, silicone masterbatch, and zinc borate with a weight ratio of 1:0.4:0.1, the dispersant is polyethylene wax, and the antioxidant is N-phenyl-1-naphthylamine.

[0033] Table 1 The addition amounts of each component in the high-temperature resistant colored asphalt provided in Examples 1-3 Raw materials Example 1 Example 2 Example 3 70# matrix asphalt (g) 700 800 600 Pigment (g) 40 30 30 Temperature-resistant additive (g) 30 40 20 Dispersant (g) 20 20 30 Antioxidant (g) 15 20 10 Examples 4-10 Examples 4-10 respectively provide a kind of high-temperature resistant colored asphalt.

[0034] The differences between the above examples and Example 1 are as follows: The components and ratios of the temperature-resistant additives are shown in Table 2 below.

[0035] Table 2 The components and ratios of the temperature-resistant additives in Examples 4-10 Examples 11-18 Examples 11-18 respectively provide a kind of high-temperature resistant colored asphalt.

[0036] The differences between the above examples and Example 1 are as follows: The components and ratios of the antioxidant are shown in Table 3 below.

[0037] Table 3 The components and ratios of the antioxidant in Examples 11-18 Example Components and ratios of antioxidants 1 N-phenyl-1-naphthylamine 11 3,5-Di-tert-butyl-2-hydroxybenzoic acid 12 2,6-Di-tert-butyl-4-methylphenol 13 N-phenyl-1-naphthylamine and 3,5-di-tert-butyl-2-hydroxybenzoic acid with a weight ratio of 1:1 14 N-phenyl-1-naphthylamine and 3,5-di-tert-butyl-2-hydroxybenzoic acid with a weight ratio of 1:1.5 15 N-phenyl-1-naphthylamine and 3,5-di-tert-butyl-2-hydroxybenzoic acid with a weight ratio of 1:2 16 N-phenyl-1-naphthylamine and 3,5-di-tert-butyl-2-hydroxybenzoic acid with a weight ratio of 1:2.5 17 N-phenyl-1-naphthylamine and 3,5-di-tert-butyl-2-hydroxybenzoic acid with a weight ratio of 1:3 18 N-phenyl-1-naphthylamine and 2,6-di-tert-butyl-4-methylphenol with a weight ratio of 1:2 Comparative Example 1 Comparative Example 1 provides a kind of high-temperature resistant colored asphalt.

[0038] The differences between the above examples and Example 1 are as follows: The addition amount of the temperature-resistant additive in the high-temperature resistant colored asphalt is 10 g.

[0039] Comparative Example 2 Comparative Example 2 provides a kind of high-temperature resistant colored asphalt.

[0040] The differences between the above examples and Example 1 are as follows: The temperature-resistant additive in the high-temperature resistant colored asphalt is phenyl silicone oil and zinc borate with a weight ratio of 1:0.1.

[0041] Comparative Example 3 Comparative Example 3 provides a kind of high-temperature resistant colored asphalt.

[0042] The difference between the above-mentioned embodiment and Embodiment 1 is that: in the high-temperature resistant colored asphalt, the temperature-resistant auxiliary agent is phenyl silicone oil and silicone masterbatch with a weight ratio of 1:0.4.

[0043] Comparative Example 4 Comparative Example 4 provides a kind of high-temperature resistant colored asphalt.

[0044] The difference between the above-mentioned embodiment and Embodiment 1 is that: in the high-temperature resistant colored asphalt, the temperature-resistant auxiliary agent is phenyl silicone oil, silicone masterbatch and zinc borate with a weight ratio of 1:1:0.5.

[0045] Comparative Example 5 Comparative Example 5 provides a kind of high-temperature resistant colored asphalt.

[0046] The difference between the above-mentioned embodiment and Embodiment 1 is that: in the high-temperature resistant colored asphalt, the temperature-resistant auxiliary agent is phenyl silicone oil, silicone masterbatch and zinc oxide with a weight ratio of 1:0.4:0.1.

[0047] Performance detection test Prepare high-temperature resistant colored asphalt detection specimens with a diameter of 160 mm and a thickness of 10 mm according to Embodiments 1-18 and Comparative Examples 1-5, and prepare 3 copies in parallel for each; respectively detect the penetration and ductility of each specimen, and observe the color; then place the specimens in an ultraviolet aging chamber for a 7-day aging test, set the wavelength to 320 nm and the temperature to 60 °C, and detect the penetration and ductility of the test and observe the color after the aging test ends. The results are shown in Table 4 below.

[0048] (1) Penetration: The penetration of the asphalt mixture is tested by the method provided in JTG E20-2011 "Test Procedures for Asphalt and Asphalt Mixtures", with the unit of 0.1 mm; Note: The penetration indicates the hardness, consistency and shear resistance of the asphalt.

[0049] (2) Ductility at 15 °C: The ductility at 15 °C of the asphalt mixture is tested by the method provided in JTG E20-2011 "Test Procedures for Asphalt and Asphalt Mixtures"; Note: The ductility mainly indicates the plasticity of the asphalt and the ability to resist deformation under external force.

[0050] (3) Degree of fading: Compare the degree of fading of each asphalt specimen before and after the aging experiment. The degree of fading is graded as: A - no fading, B - slight fading, C - medium fading, D - severe fading.

[0051] Table 4 Test results of the service performance of the high-temperature resistant colored asphalt obtained from Embodiments 1-18 and Comparative Examples 1-5 According to the test results in Table 3, the initial penetration of the high-temperature resistant colored asphalt obtained in Examples 1-18 of the present application is 6.4-6.5 mm, and the initial ductility at 15°C is 163-165 cm; after the aging test, its penetration decreases to 5.3-6.5 mm, and the ductility at 15°C decreases to 153-164 cm, and the fading grade is A-B; while the initial penetration of the high-temperature resistant colored asphalt obtained in Comparative Examples 1-5 is 6-6.5 mm, and the initial ductility at 15°C is 164 cm; after the aging test, its penetration is only 4.1-4.6 mm, and the ductility at 15°C is only 132-144 cm, and the fading grade is C. Therefore, it shows that the present application uses phenyl silicone oil, silicone masterbatch and zinc borate with a weight ratio of 1:(0.2-0.6):(0.05-0.2) as the temperature-resistant additives, and controls the addition amount of the temperature-resistant additives within the range of 2-4 parts, and the obtained asphalt has better anti-aging performance and better color stability.

[0052] From the test results of Example 1 and Examples 4-10, it can be seen that after the aging test, the penetration of the high-temperature resistant colored asphalt obtained in Examples 4, 7-8, and 10 decreases to 5.3-5.5 mm, and the ductility at 15°C decreases to 153-155 cm; while the penetration of the high-temperature resistant colored asphalt obtained in Example 1, Examples 5-6, and Example 9 decreases to 5.8-6.1 mm (>5.5 mm) after the aging test, and the ductility at 15°C decreases to 157-159 cm (>155 cm). Therefore, it shows that the present application further controls the weight ratio of phenyl silicone oil, silicone masterbatch and zinc borate within the range of 1:(0.3-0.5):(0.1-0.15), and the prepared high-temperature resistant asphalt has better anti-aging effect.

[0053] From the test results of Example 1 and Examples 11 - 18, it can be seen that in Example 1 and Examples 11 - 12, N-phenyl-1-naphthylamine, 3,5-di-tert-butyl-2-hydroxybenzoic acid or 2,6-di-tert-butyl-4-methylphenol was used as the antioxidant. After the aging test, the penetration of the high-temperature resistant colored asphalt decreased to 6.0 - 6.1 mm, the ductility at 15°C decreased to 154 - 159 cm, and the fading grade was B. In Example 18, phenyl silicone oil, silicone masterbatch and zinc borate with a weight ratio of 1:0.4:0.2 were used as the antioxidant. After the aging test, the penetration of the high-temperature resistant colored asphalt decreased to 6.0 mm, the ductility at 15°C decreased to 158 cm, and the fading grade was B. While in Examples 13 - 17, N-phenyl-1-naphthylamine and 3,5-di-tert-butyl-2-hydroxybenzoic acid with a weight ratio of 1:(1.5 - 2.5) were used as the antioxidant. After the aging test, the penetration of the high-temperature resistant colored asphalt was 6.3 - 6.5 mm, the ductility at 15°C was 160 - 161 cm, and the fading grade was A. This shows that when N-phenyl-1-naphthylamine and 3,5-di-tert-butyl-2-hydroxybenzoic acid with a weight ratio of 1:(1.5 - 2.5) are further used as the antioxidant in this application, the anti-aging effect of the prepared high-temperature resistant asphalt is better.

[0054] Although the present invention has been described in detail with general descriptions and specific embodiments above, based on the present invention, some modifications or improvements can be made, which are obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection required by the present invention.

Claims

1. An asphalt composition, characterized in that: The composition comprises the following components in parts by weight: 60-80 parts of base asphalt, 3-5 parts of pigment, 2-4 parts of heat-resistant additive, 1-3 parts of dispersant, and 1-2 parts of antioxidant; The heat-resistant auxiliary agent is phenyl silicone oil, silicone masterbatch and zinc borate in a weight ratio of 1: (0.2-0.6): (0.05-0.2).

2. The asphalt composition according to claim 1, characterized in that The heat-resistant auxiliary agent is phenyl silicone oil, silicone masterbatch and zinc borate in a weight ratio of 1: (0.3-0.5): (0.1-0.15).

3. The asphalt composition according to claim 1, characterized in that The dispersant is selected from one or more of polyol polyether phosphate, sodium lauryl sulfate, sodium benzoate, polyethylene wax and styrene.

4. The asphalt composition according to claim 1, characterized in that The antioxidant is selected from one or more of N-phenyl-1-naphthylamine, N-isopropyl-2-naphthylamine, hydroxyphenylethane, 2,6-di-tert-butyl-4-methylphenol and 3,5-di-tert-butyl-2-hydroxybenzoic acid.

5. The asphalt composition according to claim 4, characterized in that The antioxidant is N-phenyl-1-naphthylamine and 3,5-di-tert-butyl-2-hydroxybenzoic acid in a weight ratio of 1:(1.5-2.5).

6. The asphalt composition according to claim 1, characterized in that The base asphalt is 70# matrix asphalt.

7. A high temperature resistant colored asphalt, characterized in that: The asphalt is prepared by using the asphalt composition described in any one of claims 1 to 6.

8. The method for preparing high temperature resistant colored asphalt according to claim 7, characterized in that: The following steps are involved: Add the heat-resistant additive, dispersant and antioxidant to the base asphalt in sequence, and stir at 130-150°C for 30-60 minutes; then add the pigment and stir for 10-20 minutes to obtain high-temperature resistant colored asphalt.

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