Colored asphalt mixture

Abstract

Belonging to the technical field of colored pavement materials, the invention discloses a colored asphalt mixture, which is prepared from the following raw materials by weight: 4-6 parts of a colored asphalt binder, 86-92 parts of aggregate, 1-5 parts of filler, 0.3-0.5 part of an anti-rut agent, 0.5-0.9 part of a high viscosity agent, 1-5 parts of a coloring agent, and 0.1-0.6 part of a modifier. The modifier is prepared from the following raw materials in parts by weight: 2-6 parts of activated carbide slag micro powder, 0.8-1.6 parts of an odor removing agent and 17-21 parts of butadiene styrene rubber. According to the method, standardized chromaticity data are used, color communication and communication can be conveniently carried out in the industry, misunderstanding and disputes caused by color differences are reduced, and more scientific guidance is provided for design, construction and maintenance of colored asphalt pavements; through accurate chromaticity data calibration, the negative influence of the colored asphalt mixture on the environment in the production and paving processes can be reduced, and energy conservation and consumption reduction are realized.

Description

Technical Field

[0001] The invention relates to the technical field of colored pavement materials, and in particular to a colored asphalt mixture. Background Art

[0002] As a beautiful landscape in urban transportation construction, colored asphalt pavement not only significantly beautifies the urban environment, but also greatly promotes the safety management of traffic projects and enhances the overall image and charm of the city. This pavement is paved by carefully selecting aggregates and colored asphalt special binders, ingeniously integrating carefully formulated colorants, and fully mixing them. In order to meet the current society's urgent demand for high-quality colored asphalt pavement, we are committed to providing a colored asphalt mixture with excellent performance and strict compliance with the national standards of the Chinese color system. This mixture is not only rich and diverse in color, but also has a clear warning and prominent effect. It is designed to effectively extend the color service life of colored asphalt pavement and further optimize its use effect, thereby adding more colorful elements to the urban and rural environment and creating a more livable and beautiful home. .

[0003] For example, Chinese patent CN108911587B discloses high-performance colored asphalt pavement concrete and its preparation method and use method. A high-performance colored asphalt pavement concrete, by mass, includes the following raw materials: 0.6-1.5 parts of colored granular asphalt, 10 parts of graded stone; wherein the graded stone includes the following components: 9.5-16mm crushed stone, 4.75-9.5mm crushed stone, 2.36-4.75mm crushed stone, 0-2.36mm machine-made sand and mineral powder. The preparation method of the high-performance colored asphalt pavement concrete includes the following steps: S1. Prepare the graded stone, dry the graded stone and heat it to 160-180℃; S2. Transport the heated graded stone to the mixing bin of the asphalt mixing station and add the colored granular asphalt; S3. Fully mix the graded stone and the colored granular asphalt in the mixing bin to obtain the high-performance colored asphalt pavement concrete.

[0004] However, the above patent does not give a specific quantitative value for the color of the colored asphalt pavement. Generally, the result is viewed and described by the naked eye. Due to the influence of many factors such as light, angle, and visual differences of different human eyes, the color of the colored asphalt pavement can only be roughly defined, and the color information of the colored asphalt pavement cannot be accurately and standardizedly transmitted.

[0005] Based on this, the present invention designs a colored asphalt mixture to solve the above problems. Summary of the invention

[0006] In view of the above-mentioned shortcomings of the prior art, the present invention provides a colored asphalt mixture.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A colored asphalt mixture comprises the following raw materials in parts by weight: 4-6 parts of colored asphalt binder, 86-92 parts of aggregate, 1-5 parts of filler, 0.3-0.5 parts of anti-rutting agent, 0.5-0.9 parts of high viscosity agent, 1-5 parts of colorant, and 0.1-0.6 parts of modifier;

[0009] The modifier includes the following raw materials: 2-6 parts of activated carbide slag powder, 0.8-1.6 parts of deodorant, and 17-21 parts of styrene-butadiene rubber;

[0010] The preparation method of the modifier is as follows:

[0011] Step 1: preliminarily crush and dry the carbide slag, and grind it into fine powder to obtain carbide slag powder;

[0012] Step 2: activating the carbide slag powder at high temperature, and then cooling and drying it in a dryer to obtain activated carbide slag powder;

[0013] Step 3: Add ethanol aqueous solution as a dispersant to the activated carbide slag powder, and stir to disperse evenly;

[0014] Step 4: Add a deodorizer after stirring, and continue stirring to obtain an activated carbide slag suspension slurry;

[0015] Step 5: uniformly coating the activated carbide slag suspension slurry on the surface of the styrene-butadiene rubber sheet by a roller coating method, and scraping off the excess slurry with a coating roller. After the scraping is completed, the styrene-butadiene rubber sheet is placed in an oven and dried to obtain a composite material;

[0016] Step 6: Cut and crush the composite material and grind it into powder to obtain the modifier.

[0017] Furthermore, step one is specifically as follows: preliminarily crushing the carbide slag and drying it at 100-105°C, grinding it into powder and passing it through a 0.075-0.1mm sieve to obtain carbide slag powder.

[0018] Furthermore, step two is specifically as follows: pouring the carbide slag powder into a crucible, performing high temperature activation at 500-600°C for 3-4 hours, and then cooling and drying in a dryer to obtain activated carbide slag powder.

[0019] Furthermore, step three and step four are specifically as follows: add ethanol aqueous solution as a dispersant to the activated carbide slag powder, stir for 5-10 minutes to disperse evenly, add a deodorizer after stirring, and continue to stir evenly to obtain an activated carbide slag suspension slurry.

[0020] Furthermore, step five is specifically as follows: by roller coating, the activated carbide slag suspension slurry is applied at a rate of 2-4 g / m2 The coating amount is evenly coated on the surface of the styrene-butadiene rubber sheet, and the excess slurry is scraped off with a coating roller. After the scraping is completed, the styrene-butadiene rubber sheet is placed in a 100-120° C. oven and dried to obtain a composite material.

[0021] Furthermore, the colored asphalt binder is prepared from heavy mineral oil, aromatic oil and resin.

[0022] Furthermore, the aggregate is natural stone or expanded clay.

[0023] Furthermore, the filler is one or more of limestone powder, cement or fly ash.

[0024] Furthermore, the colorant is an inorganic colorant, an organic colorant, or a colorant blended from an inorganic and an organic colorant.

[0025] Furthermore, the above-mentioned colored asphalt mixture uses a physical sample with a corresponding number (HV / C) in the Chinese Color System National Standard Sample Book to perform colorimetric data detection and calibration on the prepared colored asphalt mixture.

[0026] Furthermore, the color data detection and calibration of the prepared colored asphalt mixture using the physical sample with the corresponding number (HV / C) of the Chinese color system national standard sample book includes the following steps:

[0027] (1) Determine the target color: According to actual needs, select an appropriate color number (HV / C) from the standard sample book as a reference standard for the target color;

[0028] (2) Colorant selection: Select the appropriate colorant according to the target color.

[0029] Initial blending: Based on the type of colorant, color brightness and target color, set the initial ratio and add the colorant to the asphalt to ensure a consistent color distribution;

[0030] (3) Chromaticity data detection: Take samples from the uniformly mixed colored asphalt mixture to ensure that the samples are representative, use professional colorimetric measurement equipment to measure the chromaticity data of the samples, record the measured chromaticity data (including hue H, lightness V and chroma C), and compare and analyze them with the target color reference standard selected in step (1);

[0031] (4) Calibration and adjustment: Based on the comparative analysis results, adjust the type, proportion or amount of colorant added to reduce the difference between the measured data and the target color reference standard;

[0032] (5) Remixing and measuring: Mix the adjusted colorant with the asphalt again and repeat steps (3) to (5) until the measured data is basically consistent with the target color reference standard.

[0033] Beneficial Effects

[0034] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention introduces the national standard of the Chinese color system, ensuring that the color calibration of colored asphalt mixtures is highly accurate and uniform; the use of the three HV / C color attributes (hue H, lightness V, chroma C) can accurately describe and distinguish different colors, avoiding the ambiguity and ambiguity in traditional color descriptions; the use of standardized chromaticity data can facilitate color exchanges and communication within the industry, reducing misunderstandings and disputes caused by color differences; at the same time, standardized color data can also be combined with computer technology and design software to achieve rapid simulation and optimization of colored asphalt mixture formulas, providing more scientific guidance for the design, construction and maintenance of colored asphalt pavements, and ensuring the durability and aesthetics of pavement colors; through precise chromaticity data calibration, the negative impact of colored asphalt mixtures on the environment during production and paving can be reduced, saving energy and reducing consumption; it is conducive to promoting the standardized development of the colored asphalt pavement industry and improving the technical level and market competitiveness of the entire industry.

[0035] 2. The present invention activates carbide slag powder so that the prepared colored asphalt mixture has good flexibility in low temperature environment, can withstand large deformation, and is not prone to breakage; by optimizing the composite process of styrene-butadiene rubber, activated carbide slag powder, and deodorizer, the high-temperature dynamic stability of the prepared colored asphalt mixture far exceeds the standard value of 800 times / mm, indicating that it has better deformation resistance at high temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 Color card samples of the China Architectural Color Card National Standard Booklet used for color calibration and calibration of the present invention;

[0037] Figure 2 This is a photo of samples obtained with different addition amounts when the colorant is the green colorant OP600CB-G1 in Example 3;

[0038] Figure 3 This is a photo of samples obtained with different addition amounts when the colorant is the blue colorant OP680CB-B2 in Example 3;

[0039] Figure 4 These are photos of samples obtained with different addition amounts when the colorant in Example 3 is the red colorant OP630CB-R1. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. The colored asphalt binder used in the present invention is prepared from heavy mineral oil, aromatic oil and resin, and its performance meets the relevant technical requirements for colored asphalt in the national standard "Colored Asphalt Concrete" (GB / T 32984-2016) or the industry standard "Technical Specifications for Colored Asphalt Concrete Pavement of Urban Roads" (CJJ / T 218-2014); the aggregate is natural stone or ceramsite, and 5mm coal gangue ceramsite is selected in the embodiment; its performance meets the relevant technical requirements for aggregate in the industry standard "Technical Specifications for Construction of Highway Asphalt Pavement" (JTG F40-2004) or the industry standard "Technical Specifications for Colored Asphalt Concrete Pavement of Urban Roads" (CJJ / T 218-2014); the filler is one or more of limestone powder, cement or fly ash, and fly ash is selected in the embodiment, and its performance meets the industry standard "Technical Specifications for Construction of Highway Asphalt Pavement" (JTG F40-2004) or the industry standard "Technical Specifications for Colored Asphalt Concrete Pavement of Urban Roads" (CJJ / T 218-2014) for fillers; the colorant is an inorganic colorant, an organic colorant or a colorant blended with an inorganic and organic colorant, which has strong coloring ability, easy dispersion, high temperature resistance and wear resistance in the colored asphalt mixture. The colorant selected in the embodiment has performance that meets the relevant technical requirements for pigments in the national standard "Colored Asphalt Concrete" (GB / T32984-2016) or the industry standard "Technical Specifications for Colored Asphalt Concrete Pavement of Urban Roads" (CJJ / T218-2014); the colored asphalt binder, anti-rutting agent, high viscosity agent, deodorant and colorant are all from Shenzhen Haichuan New Materials Technology Co., Ltd. Among them, the green colorant model is OP600CB-G1, the red colorant model is OP630CB-R1, the blue colorant model is OP680CB-B2, the high viscosity model is SINOTPS, and the anti-rutting agent model is HI.

[0041] Embodiment 1: This embodiment provides a colored asphalt mixture, comprising the following steps:

[0042] Step 1: Preliminarily crush and dry (105°C) the carbide slag (waste residue with calcium hydroxide as the main component after acetylene gas is obtained by hydrolyzing calcium carbide, which comes from the company's production waste residue), grind it into powder and pass it through a 0.1mm sieve to obtain carbide slag powder;

[0043] Step 2: pour the carbide slag powder into a crucible, perform high temperature activation at 600°C for 4 hours, and then cool and dry in a dryer to obtain activated carbide slag powder;

[0044] Step 3: Add 40% by mass ethanol aqueous solution as a dispersant to the activated carbide slag powder, stir magnetically for 10 minutes, and disperse evenly;

[0045] Step 4: Add the deodorizer and continue stirring to obtain activated carbide slag suspension slurry.

[0046] Step 5: Use roller coating method to apply activated carbide slag suspension slurry at 4g / m 2 The coating amount is evenly coated on the surface of the styrene-butadiene rubber sheet, and the excess slurry is scraped off with a coating roller. After the scraping is completed, the styrene-butadiene rubber sheet is placed in a 120° C. oven and dried to obtain a composite material;

[0047] Step 6: Cut and crush the composite material and grind it into powder to obtain the modifier;

[0048] Step seven: Mix 6kg of colored asphalt binder, 92kg of aggregate (5mm coal gangue expanded clay), 5kg of filler (fly ash), 0.5kg of anti-rutting agent, 0.9kg of high viscosity agent, 5kg of colorant (green colorant OP600CB-G1), and 0.6kg of the modifier prepared in step six to obtain a colored asphalt mixture.

[0049] Embodiment 2: This embodiment provides a colored asphalt mixture, comprising the following steps:

[0050] Step 1: Preliminarily crush and dry (100°C) the carbide slag (waste slag with calcium hydroxide as the main component after acetylene gas is obtained by hydrolysis of carbide, which comes from the company's production waste slag), grind it into powder and pass it through a 0.075mm sieve to obtain carbide slag micro powder;

[0051] Step 2: pour the carbide slag powder into a crucible, perform high temperature activation at 500°C for 3 hours, and then cool and dry in a dryer to obtain activated carbide slag powder;

[0052] Step 3: Add 40% by mass ethanol aqueous solution as a dispersant to the activated calcium carbide slag powder, stir magnetically for 5 minutes, and disperse evenly;

[0053] Step 4: Add the deodorizer and continue stirring to obtain activated carbide slag suspension slurry.

[0054] Step 5: Use roller coating method to apply activated carbide slag suspension slurry at a rate of 2g / m 2 The coating amount is evenly coated on the surface of the styrene-butadiene rubber sheet, and the excess slurry is scraped off with a coating roller. After the scraping is completed, the styrene-butadiene rubber sheet is placed in a 100° C. oven and dried to obtain a composite material;

[0055] Step 6: Cut and crush the composite material and grind it into powder to obtain the modifier;

[0056] Step seven: Mix 4kg of colored asphalt binder, 86kg of aggregate (10mm basalt), 1kg of filler (limestone powder), 0.3kg of anti-rutting agent, 0.5kg of high viscosity agent, 1kg of colorant (green colorant OP600CB-G1), and 0.1kg of the modifier obtained in step six to obtain a colored asphalt mixture.

[0057] Embodiment 3: This embodiment provides a colored asphalt mixture, comprising the following steps:

[0058] Step 1: Preliminarily crush and dry (103°C) the carbide slag (waste residue with calcium hydroxide as the main component after acetylene gas is obtained by hydrolysis of carbide, which comes from the company's production waste residue), grind it into powder and pass it through a 0.08mm sieve to obtain carbide slag powder;

[0059] Step 2: pour the carbide slag powder into a crucible, activate it at high temperature at 580°C for 3 hours, and then cool and dry it in a dryer to obtain activated carbide slag powder;

[0060] Step 3: Add 40% by mass ethanol aqueous solution as a dispersant to the activated calcium carbide slag powder, stir magnetically for 8 minutes, and disperse evenly;

[0061] Step 4: Add the deodorizer and continue stirring to obtain activated carbide slag suspension slurry.

[0062] Step 5: Use roller coating method to apply activated carbide slag suspension slurry at a rate of 3g / m 2 The coating amount is evenly coated on the surface of the styrene-butadiene rubber sheet, and the excess slurry is scraped off with a coating roller. After the scraping is completed, the styrene-butadiene rubber sheet is placed in a 115° C. oven and dried to obtain a composite material;

[0063] Step 6: Cut and crush the composite material and grind it into powder to obtain the modifier;

[0064] Step seven: Mix 5kg of colored asphalt binder, 89kg of aggregate (38kg of 10mm basalt, 51kg of 15mm basalt), 2.5kg of filler (limestone powder), 0.4kg of anti-rutting agent, 0.7kg of high viscosity agent, 3kg of colorant (green colorant OP600CB-G1), and 0.4kg of modifier prepared in step six to obtain a colored asphalt mixture.

[0065] Comparative Example 1: The difference from Example 3 is that the carbide slag powder is not activated;

[0066] This comparative example provides a colored asphalt mixture, comprising the following steps:

[0067] Step 1: Preliminarily crush and dry (103°C) the carbide slag (waste residue with calcium hydroxide as the main component after acetylene gas is obtained by hydrolysis of carbide, which comes from the company's production waste residue), grind it into powder and pass it through a 0.08mm sieve to obtain carbide slag powder;

[0068] Step 2: Add 40% by mass ethanol aqueous solution as a dispersant to the activated carbide slag powder, stir magnetically for 8 minutes, and disperse evenly;

[0069] Step 3: Add the deodorizer and continue stirring to obtain carbide slag suspension slurry.

[0070] Step 4: Use roller coating method to apply carbide slag suspension slurry at 3g / m 2 The coating amount is evenly coated on the surface of the styrene-butadiene rubber sheet, and the excess slurry is scraped off with a coating roller. After the scraping is completed, the styrene-butadiene rubber sheet is placed in a 115° C. oven and dried to obtain a composite material;

[0071] Step 5: Cut and crush the composite material and grind it into powder to obtain the modifier;

[0072] Step six: Mix 5kg of colored asphalt binder, 89kg of aggregate (38kg of 10mm basalt, 51kg of 15mm basalt), 2.5kg of filler (limestone powder), 0.4kg of anti-rutting agent, 0.7kg of high viscosity agent, 3kg of colorant (green colorant OP600CB-G1), and 0.4kg of modifier prepared in step six to obtain a colored asphalt mixture.

[0073] Comparative Example 2: The difference from Example 3 is that in step 4, the mixture A and the activated carbide slag suspension slurry are directly mixed with the styrene-butadiene rubber sheet without coating;

[0074] This comparative example provides a colored asphalt mixture, comprising the following steps:

[0075] Step 1: Preliminarily crush and dry (103°C) the carbide slag (waste residue with calcium hydroxide as the main component after acetylene gas is obtained by hydrolysis of carbide, which comes from the company's production waste residue), grind it into powder and pass it through a 0.08mm sieve to obtain carbide slag powder;

[0076] Step 2: pour the carbide slag powder into a crucible, activate it at high temperature at 580°C for 3 hours, and then cool and dry it in a dryer to obtain activated carbide slag powder;

[0077] Step 3: Add 40% by mass ethanol aqueous solution as a dispersant to the activated calcium carbide slag powder, stir magnetically for 8 minutes, and disperse evenly;

[0078] Step 4: Add the deodorizer and continue stirring to obtain activated carbide slag suspension slurry.

[0079] Step 5: Cut and crush the styrene-butadiene rubber sheet, mix it with the activated carbide slag suspension slurry, stir it evenly, and put it into a 115° C. oven to obtain a composite material;

[0080] Step 6: Cut and crush the composite material and grind it into powder to obtain the modifier;

[0081] Step seven: Mix 5kg of colored asphalt binder, 89kg of aggregate (38kg of 10mm basalt, 51kg of 15mm basalt), 2.5kg of filler (limestone powder), 0.4kg of anti-rutting agent, 0.7kg of high viscosity agent, 3kg of colorant (green colorant OP600CB-G1), and 0.4kg of modifier prepared in step six to obtain a colored asphalt mixture.

[0082] Experimental example:

[0083] 1. High temperature stability test;

[0084] This test is in accordance with the relevant requirements of the "Highway Engineering Asphalt and Asphalt Mixture Test Procedure" (JTG E20-2011), and the basalt spreading amount is 40%. This test uses the LHCX-1 fully automatic asphalt mixture rutting tester to measure the dynamic stability (DS) of the mixture at high temperature to evaluate the performance of the asphalt mixture under vehicle load under high temperature conditions. First, after the standard molded specimen is left to stand for 24 hours, the specimen is placed in the rutting tester. The test environment temperature is 60℃ and the pressure applied by the test wheel is 0.7MPa. The test wheel repeatedly moves back and forth on the surface of the mixture specimen at a frequency of N (42±1) times / min for 1 hour until the maximum deformation of the specimen reaches 25mm. After the test, the dynamic stability of the asphalt mixture is calculated based on the maximum deformation generated by the test wheel on the specimen surface. The higher the dynamic stability value, the better the deformation resistance of the mixture at high temperature. The calculation formula of dynamic stability is as follows:

[0085] DS=

(T2-T1)×N / (D2-D1)

[0086] DS: dynamic stability, times / mm; D1, D2: the corresponding deformation at 45min and 60min of the test, mm; T1, T2: 45min and 60min after the start of the test, respectively; C1, C2: testing machine type correction factor and test factor, respectively, both are taken as 1.0.

[0087] 2. Low temperature crack resistance;

[0088] Low-temperature crack resistance is one of the important indicators for evaluating the performance of asphalt pavement, which mainly reflects the ability of pavement materials to prevent cracks in low-temperature environments. This paper uses a bending failure test to evaluate the low-temperature crack resistance of asphalt mixtures. The asphalt mixture splitting tester model is SYD0716. Six groups of specimens are loaded in a specified test environment. By observing the mid-span deflection of the specimens at failure, the flexural tensile strength at failure is calculated. The greater the flexural tensile strength, the better the low-temperature crack resistance. The flexural tensile strength calculation formula is as follows:

[0089] R B =3LP B / 2bh 2 ;

[0090] R B : flexural tensile strength, MPa; L: specimen span, m; P B : Maximum failure load, kN; b: Width of span-break test piece, m; h: Height of span-break test piece, m.

[0091] project Embodiment 1 Embodiment 2 Embodiment 3 Comparative Example 1 Comparative Example 2 DS(times / mm) 2520 2531 2436 2465 2130 <![CDATA[R B (MPa)]]> 3113 3121 3056 2108 3004

[0092] The present invention activates carbide slag powder so that the prepared colored asphalt mixture has good flexibility in a low-temperature environment, can withstand large deformation, and is not prone to breakage; by optimizing the composite process of styrene-butadiene rubber, activated carbide slag powder, and deodorizer, the high-temperature dynamic stability of the prepared colored asphalt mixture far exceeds the standard value of 800 times / mm, indicating that it has better deformation resistance at high temperatures.

[0093] 3. Chroma data detection;

[0094] When the amount of colorant added in Example 3 is adjusted, the physical samples corresponding to the numbers (HV / C) of the following Chinese color system national standard sample books can be realized in sequence, and the color data of the prepared colored asphalt mixture is tested, and the results are as follows:

[0095]

[0096] When the colorant in Example 3 is replaced with the blue colorant OP680CB-B2 and the addition amount thereof is adjusted, the following physical samples corresponding to the numbers (HV / C) of the national standard sample book of the Chinese color system can be successively realized, and the color data of the obtained colored asphalt mixture is tested, and the results are as follows:

[0097]

[0098] When the colorant in Example 3 is replaced with the red colorant OP630CB-R1 and the addition amount thereof is adjusted, the following physical samples corresponding to the numbers (HV / C) of the national standard sample book of the Chinese color system can be successively realized, and the color data of the obtained colored asphalt mixture is tested, and the results are as follows:

[0099]

[0100] The above colors and data are for illustration only. When the overall solution provided by the present invention is adopted and the colorant is replaced with other colorants of any color and any model from any other manufacturer, it will not affect the essence of the solution.

[0101] The above is a laboratory practice. In actual application, the physical samples with the corresponding numbers (HV / C) in the China Color System National Standard Sample Book can be used to test and calibrate the color data of the prepared colored asphalt mixture, including the following steps:

[0102] (1) Determine the target color: According to the actual needs of the customer, select the appropriate color number (HV / C) from the standard catalog as the target color reference standard;

[0103] (2) Colorant selection: Select the appropriate colorant according to the target color.

[0104] Initial blending: Based on the type of colorant, color brightness and target color, set the initial ratio and add the colorant to the asphalt to ensure a consistent color distribution;

[0105] (3) Chromaticity data detection: Take samples from the uniformly mixed colored asphalt mixture to ensure that the samples are representative, use professional colorimetric measurement equipment to measure the chromaticity data of the samples, record the measured chromaticity data (including hue H, lightness V and chroma C), and compare and analyze them with the target color reference standard selected in step (1);

[0106] (4) Calibration and adjustment: Based on the comparative analysis results, adjust the type, proportion or amount of colorant added to reduce the difference between the measured data and the target color reference standard;

[0107] (5) Remixing and measuring: Mix the adjusted colorant with the asphalt again and repeat steps (3) to (5) until the measured data is basically consistent with the target color reference standard.

[0108] That is, the color of the obtained product can be directly named and calibrated using the corresponding number of the Chinese color system national standard sample book selected by the customer in the above step (1). All products named and calibrated using this method can effectively avoid a series of problems caused by inconsistent color naming methods.

[0109] The Chinese color system national standard is introduced into the solution of the present invention, ensuring that the color calibration of colored asphalt mixtures is highly accurate and uniform; the use of the three HV / C color attributes (hue H, lightness V, chroma C) can accurately describe and distinguish different colors, avoiding the ambiguity and ambiguity in traditional color descriptions; the use of standardized chromaticity data can facilitate color exchanges and communication within the industry, reducing misunderstandings and disputes caused by color differences; at the same time, standardized color data can also be combined with computer technology and design software to achieve rapid simulation and optimization of colored asphalt mixture formulas, providing more scientific guidance for the design, construction and maintenance of colored asphalt pavements, and ensuring the durability and aesthetics of pavement colors; through precise chromaticity data calibration, the negative impact of colored asphalt mixtures on the environment during production and paving can be reduced, energy saving and consumption reduction can be achieved; it is conducive to promoting the standardized development of the colored asphalt pavement industry and improving the technical level and market competitiveness of the entire industry.

[0110] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A colored asphalt mixture, characterized in that: The raw materials include the following parts by weight: 4-6 parts of colored asphalt binder, 86-92 parts of aggregate, 1-5 parts of filler, 0.3-0.5 parts of anti-rutting agent, 0.5-0.9 parts of high viscosity agent, 1-5 parts of colorant, and 0.1-0.6 parts of modifier; The modifier includes the following raw materials: 2-6 parts of activated carbide slag powder, 0.8-1.6 parts of deodorant, and 17-21 parts of styrene-butadiene rubber; The preparation method of the modifier is as follows: Step 1: preliminarily crush and dry the carbide slag, and grind it into fine powder to obtain carbide slag powder; Step 2: activating the carbide slag powder at high temperature, and then cooling and drying it in a dryer to obtain activated carbide slag powder; Step 3: Add ethanol aqueous solution as a dispersant to the activated carbide slag powder, and stir to disperse evenly; Step 4: Add a deodorizer after stirring, and continue stirring to obtain an activated carbide slag suspension slurry; Step 5: uniformly coating the activated carbide slag suspension slurry on the surface of the styrene-butadiene rubber sheet by a roller coating method, and scraping off the excess slurry with a coating roller. After the scraping is completed, the styrene-butadiene rubber sheet is placed in an oven and dried to obtain a composite material; Step 6: Cut and crush the composite material and grind it into powder to obtain the modifier.

2. The colored asphalt mixture according to claim 1, characterized in that: Step one is as follows: preliminarily crush the carbide slag and dry it at 100-105°C, grind it into powder and pass it through a 0.075-0.1mm sieve to obtain carbide slag powder.

3. The colored asphalt mixture according to claim 1, characterized in that: Step 2 is specifically as follows: pour the carbide slag powder into a crucible, perform high temperature activation at 500-600°C for 3-4 hours, and then cool and dry in a dryer to obtain the activated carbide slag powder.

4. The colored asphalt mixture according to claim 1, characterized in that: Step three and step four are specifically as follows: add ethanol aqueous solution as a dispersant to the activated carbide slag powder, stir for 5-10 minutes to disperse evenly, add deodorizer after stirring, and continue to stir evenly to obtain activated carbide slag suspension slurry.

5. The colored asphalt mixture according to claim 1, characterized in that: Step 5 is as follows: by roller coating, the activated carbide slag suspension slurry is applied at a rate of 2-4 g / m 2 The coating amount is evenly coated on the surface of the styrene-butadiene rubber sheet, and the excess slurry is scraped off with a coating roller. After the scraping is completed, the styrene-butadiene rubber sheet is placed in a 100-120° C. oven and dried to obtain a composite material.

6. The colored asphalt mixture according to claim 1, characterized in that: The colored asphalt binder is prepared from heavy mineral oil, aromatic oil and resin.

7. The colored asphalt mixture according to claim 1, characterized in that: The aggregate is natural stone or ceramsite; the colorant is an inorganic colorant, an organic colorant or a colorant blended from inorganic and organic.

8. The colored asphalt mixture according to claim 1, characterized in that: The filler is one or more of limestone powder, cement or fly ash.

9. The colored asphalt mixture according to any one of claims 1 to 8, characterized in that: The color data of the prepared colored asphalt mixture was tested and calibrated using the physical samples with the corresponding numbers (HV / C) in the China Color System National Standard Sample Book.

10. The colored asphalt mixture according to claim 9, characterized in that: The color data detection and calibration of colored asphalt mixture includes the following steps: (1) Determine the target color: According to actual needs, select an appropriate color number (HV / C) from the standard sample book as a reference standard for the target color; (2) Colorant selection: Select the appropriate colorant according to the target color. Initial blending: According to the type of colorant, color brightness and target color, set the initial proportion relationship and add the colorant to the asphalt mixture to ensure a consistent color distribution; (3) Chromaticity data detection: Take samples from the uniformly mixed colored asphalt mixture to ensure that the samples are representative, use professional colorimetric measurement equipment to measure the colorimetric data of the samples, record the measured colorimetric data, and compare and analyze them with the target color reference standard selected in step (1); (4) Calibration and adjustment: Based on the comparative analysis results, adjust the type, proportion or amount of colorant added to reduce the difference between the measured data and the target color reference standard; (5) Remixing and measuring: Mix the adjusted colorant with the asphalt again and repeat steps (3) to (5) until the measured data is basically consistent with the target color reference standard.

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