Preparation method of high-flexibility warm mixing liquid for low-carbon cold construction asphalt pavement material

Abstract

The invention relates to the technical field of asphalt pavement materials, and discloses a preparation method of a high-flexibility warm mixing liquid for a low-carbon cold construction asphalt pavement material, and the preparation method comprises the following preparation steps: 1) preparing initial grease from animal fat; 2) stirring and mixing the initial grease and a sulfuric acid solution to obtain a supernatant; 3) adding an ethylene-propylene polycondensation emulsion and dialkyl phosphate into the supernatant to form a mixed solution; 4) adding sodium oxide powder into the centrifuged mixed solution to obtain a precipitate; 5) stirring and mixing the precipitate and a hydrochloric acid solution to form a stirred solution; (6) standing the stirring liquid for a set time until the stirring liquid is layered, and forming upper-layer liquid at the upper part of the stirring liquid; 7) collecting supernatant liquid, and performing ultraviolet searchlighting treatment on the supernatant liquid to form high-flexibility warm mixing liquid; through unique process and component selection, the flexibility, stability and environmental protection property of the warm mixing liquid are improved, and the quality of the warm mixing liquid is integrally improved.

Description

Technical Field

[0001] The patent of this invention relates to the technical field of asphalt paving materials, specifically, to a method for preparing highly flexible warm mix liquid for low-carbon cold construction asphalt paving materials. Background Art

[0002] In the field of low-carbon cold-construction asphalt paving materials, the use of warm mix liquid is one of the key links. Warm mix liquid is mainly used to improve the construction performance of asphalt mixture, reduce construction temperature, and reduce energy consumption and environmental pollution.

[0003] However, traditional warm mix liquid still has shortcomings in quality and is difficult to meet the high standards required for low-carbon cold construction.

[0004] In existing technologies, traditional warm mix tends to become brittle in low-temperature environments, resulting in a decrease in the flexibility of asphalt paving materials. For example, when constructing in cold regions or during low-temperature seasons, the lack of flexibility of the warm mix may cause cracks in the asphalt pavement, shortening the service life of the pavement.

[0005] Furthermore, existing warm mix solutions are prone to stratification and sedimentation during storage and use. For example, after prolonged storage, the components of some warm mix solutions will separate, resulting in uneven mixing during construction and affecting paving quality.

[0006] In addition, some traditional warm mix liquids use a large amount of chemical reagents in the preparation process, which not only leads to high energy consumption, but also poses the risk of environmental pollution and does not meet the increasingly stringent environmental protection standards. Summary of the Invention

[0007] The purpose of the present invention is to provide a method for preparing a highly flexible warm mix liquid for low-carbon cold-construction asphalt paving materials, aiming to solve the problem of poor quality of the warm mix liquid for low-carbon cold-construction asphalt paving materials in the prior art.

[0008] The present invention is achieved by a method for preparing a highly flexible warm mix liquid for low-carbon cold construction asphalt paving materials, comprising the following preparation steps:

[0009] 1) Using animal fat to prepare initial oil;

[0010] 2) After heating the initial oil to a set temperature, adding sulfuric acid solution to the initial oil, stirring and mixing the initial oil and sulfuric acid solution, and letting them stand for a set time to obtain a supernatant;

[0011] 3) adding propylene glycol polycondensation emulsion and dialkyl phosphate to the upper liquid to form a mixed liquid, and placing the mixed liquid in a centrifuge for centrifugal treatment;

[0012] 4) adding sodium oxide powder to the centrifuged mixed solution, and heating and stirring for a set time to obtain a precipitate;

[0013] 5) placing the precipitate in a magnetic stirrer, adding a hydrochloric acid solution, and stirring the precipitate and the hydrochloric acid solution to form a stirring liquid;

[0014] 6) The stirred liquid is allowed to stand for a set time until the stirred liquid separates into layers and an upper layer of liquid is formed on the upper portion of the stirred liquid;

[0015] 7) Collecting the upper layer of liquid and treating the upper layer of liquid with ultraviolet light to form the highly flexible warm mixed liquid.

[0016] Furthermore, in the preparation step 1), after soaking the animal fat for a set time, the animal fat is heated to obtain initial oil.

[0017] Furthermore, after the initial grease is cooled, there are precipitated impurities at the bottom of the initial grease, and the impurities are removed.

[0018] Furthermore, in the preparation step 2), after the initial oil is heated to 90° C.-100° C., a 90% sulfuric acid solution is added to the initial oil, wherein the weight of the sulfuric acid solution accounts for 10%-20% of the weight of the initial oil;

[0019] The initial oil and fat are stirred and mixed with the sulfuric acid solution for 20-30 minutes, and then allowed to stand for 36-48 hours to obtain the upper liquid.

[0020] Furthermore, in the preparation step 3), the weight of the propylene-vinyl condensation emulsion is 3%-5% of the weight of the upper liquid, and the weight of the dialkyl phosphate is 3%-5% of the weight of the upper liquid; and the mixed liquid is centrifuged for 1 hour to 3 hours.

[0021] Furthermore, in the preparation step 4), the weight of the sodium oxide powder is 1%-3% of the weight of the mixed solution.

[0022] Furthermore, in the preparation step 4), the mixed solution to which the sodium oxide powder is added is heated to 90° C. to 100° C. and stirred for 10 min to 20 min to obtain the precipitate.

[0023] Furthermore, in the preparation step 5), a 60% hydrochloric acid solution is added to the magnetic stirrer, where the weight of the hydrochloric acid solution is 10%-20% of the weight of the precipitate; the temperature of the stirring liquid is maintained between 80°C and 100°C, and the stirring is carried out at a speed of 200 rpm to 300 rpm for 4 hours.

[0024] Furthermore, in the preparation step 7), the upper layer liquid is subjected to ultraviolet irradiation treatment for 12 hours to 18 hours, and when the viscosity reaches between 800 Pa.s and 1000 Pa.s, the upper layer liquid forms the highly flexible warm mix liquid.

[0025] Furthermore, in the preparation step 7), the upper layer of liquid is placed in a precipitation container, wherein the precipitation container has a precipitation chamber, wherein a conical cylinder is formed in the middle of the precipitation chamber, which is larger at the bottom and smaller at the top; the outer periphery of the conical cylinder has an outer reflective surface, and the outer reflective surface and the inner sidewall of the precipitation chamber form an annular precipitation area; the inner side of the conical cylinder has an inner diffusion surface arranged in an annular manner;

[0026] The outer periphery of the precipitation container is provided with an ultraviolet lamp arranged in a ring and emitting ultraviolet rays, and the ultraviolet lamp surrounds the outer periphery of the precipitation container; the upper layer of liquid is placed in the precipitation area, and the ultraviolet rays emitted by the ultraviolet lamp irradiate the upper part of the upper layer of liquid in a ring from the outside to the inside, part of the ultraviolet rays pass through the outer reflecting surface and irradiate the upper part of the upper layer of liquid from the inside to the outside, and part of the ultraviolet rays pass through the conical cylinder, are diffusely reflected by the inner diffusing surface, and are reflected in multiple directions from the inside to the outside to irradiate the upper part of the upper layer of liquid.

[0027] Compared with the prior art, the method for preparing a highly flexible warm mix liquid for low-carbon cold-construction asphalt paving materials provided by the present invention has the following advantages:

[0028] 1) By adding propylene glycol polycondensation emulsion and dialkyl phosphate, and combining centrifugal treatment and other steps, the warm mix liquid can still maintain good flexibility in low temperature environment, which not only solves the problem of insufficient flexibility and easy brittle cracking of the warm mix liquid under low temperature conditions, but also improves the construction performance and service life of asphalt paving materials in low temperature environment.

[0029] 2) After centrifugal treatment and ultraviolet irradiation treatment, the components of the warm mix liquid are more evenly distributed and the chemical stability is significantly improved. As a result, during storage and use, the warm mix liquid is not easy to stratify and precipitate, ensuring the uniformity and consistency during construction and improving the reliability of construction quality.

[0030] 3) Animal fat is used as the initial raw material, which is widely available and relatively environmentally friendly. At the same time, by optimizing the preparation process, the use of chemical reagents is reduced, and the impact on the environment is reduced, making it more suitable for the needs of modern environmentally friendly construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic flow chart of a method for preparing a highly flexible warm mix liquid for low-carbon cold-construction asphalt paving materials provided by the present invention;

[0032] Figure 2 is a schematic cross-sectional view of the precipitation container provided by the present invention;

[0033] In the figure: precipitation container 100, precipitation chamber 101, conical tube 102, outer reflective surface 103, precipitation area 104, inner diffuse surface 105, ultraviolet lamp 106. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0035] The implementation of the present invention is described in detail below with reference to specific embodiments.

[0036] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0037] Reference Figure 1-2 The figure shows a preferred embodiment of the present invention.

[0038] A method for preparing a highly flexible warm mix liquid for low-carbon cold-construction asphalt paving materials comprises the following preparation steps:

[0039] 1) Using animal fat to prepare initial oil;

[0040] 2) After heating the initial oil to a set temperature, add sulfuric acid solution to the initial oil, stir and mix the initial oil and sulfuric acid solution, and let it stand for a set time to obtain a supernatant liquid;

[0041] 3) Adding propylene glycol polycondensation emulsion and dialkyl phosphate to the upper liquid to form a mixed liquid, and placing the mixed liquid in a centrifuge for centrifugal treatment;

[0042] 4) Adding sodium oxide powder to the centrifuged mixture and heating and stirring for a set time to obtain a precipitate;

[0043] 5) Place the precipitate in a magnetic stirrer, add hydrochloric acid solution, and stir the precipitate and hydrochloric acid solution to form a stirring liquid;

[0044] 6) The stirred liquid is allowed to stand for a set time until the stirred liquid separates into layers and an upper layer of liquid is formed on the upper part of the stirred liquid;

[0045] 7) Collect the upper layer of liquid and treat it with ultraviolet light to form a highly flexible warm mixed liquid.

[0046] The above-mentioned method for preparing a highly flexible warm mix liquid for low-carbon cold-construction asphalt paving materials has the following advantages:

[0047] 1) By adding propylene glycol polycondensation emulsion and dialkyl phosphate, and combining centrifugal treatment and other steps, the warm mix liquid can still maintain good flexibility in low temperature environment, which not only solves the problem of insufficient flexibility and easy brittle cracking of the warm mix liquid under low temperature conditions, but also improves the construction performance and service life of asphalt paving materials in low temperature environment.

[0048] 2) After centrifugal treatment and ultraviolet irradiation treatment, the components of the warm mix liquid are more evenly distributed and the chemical stability is significantly improved. As a result, during storage and use, the warm mix liquid is not easy to stratify and precipitate, ensuring the uniformity and consistency during construction and improving the reliability of construction quality.

[0049] 3) Animal fat is used as the initial raw material, which is widely available and relatively environmentally friendly. At the same time, by optimizing the preparation process, the use of chemical reagents is reduced, and the impact on the environment is reduced, making it more suitable for the needs of modern environmentally friendly construction.

[0050] In this embodiment, in the preparation step 1), after soaking the animal fat for a set time, the animal fat is heated to obtain initial oil; in this way, the effective components in the animal fat can be fully extracted, providing high-quality initial raw materials for the subsequent preparation of the warm mix liquid, thereby ensuring the performance foundation of the warm mix liquid.

[0051] In this embodiment, after the initial grease is cooled, precipitated impurities are present at the bottom of the initial grease, and the impurities are removed. In this way, the initial grease has a higher purity, which can effectively avoid the adverse effects of impurities on the subsequent reaction process and the performance of the final warm mix liquid, thereby improving the quality of the warm mix liquid.

[0052] In this embodiment, in the preparation step 2), after the initial oil is heated to 90° C.-100° C., a 90% sulfuric acid solution is added to the initial oil, wherein the weight of the sulfuric acid solution accounts for 10%-20% of the weight of the initial oil;

[0053] The initial oil and fat are stirred and mixed with the sulfuric acid solution for 20-30 minutes, and then allowed to stand for 36-48 hours to obtain the upper liquid.

[0054] By controlling the heating temperature, the concentration and amount of sulfuric acid solution added, as well as the stirring and standing time, the initial oil and fat can fully react with the sulfuric acid solution to generate an upper layer liquid with specific properties, providing a key intermediate product for the subsequent preparation of the warm mix liquid, thereby affecting the performance of the final warm mix liquid.

[0055] In this embodiment, in the preparation step 3), the weight of the propylene-vinyl condensation emulsion is 3%-5% of the weight of the upper liquid, and the weight of the dialkyl phosphate is 3%-5% of the weight of the upper liquid; the mixed liquid is centrifuged for 1h-3h.

[0056] By precisely controlling the addition amounts of propylene glycol polycondensation emulsion and dialkyl phosphate and performing centrifugal treatment, the various components can be fully mixed and insoluble matter such as impurities can be removed to form a uniform and stable mixed liquid. This helps to improve the flexibility and stability of the warm mix liquid, enabling it to better adapt to different environmental conditions during the construction process and improve construction quality.

[0057] The propylene vinyl condensation emulsion mentioned in this example is colorless and transparent, and has the effect of decolorization and flocculation, while the dialkyl phosphate has the effect of solubilization and defoaming.

[0058] In this embodiment, in the preparation step 4), the weight of the sodium oxide powder is 1%-3% of the weight of the mixed solution. Thus, the appropriate addition of sodium oxide powder can play a key chemical role in the subsequent reaction process, promote the formation of a precipitate, and further affect the performance of the warm mix solution, thereby providing a guarantee for the preparation of a high-quality warm mix solution.

[0059] In this embodiment, in the preparation step 4), the mixed solution to which the sodium oxide powder is added is heated to 90° C. to 100° C. and stirred for 10 to 20 minutes to obtain a precipitate.

[0060] Through heating and stirring treatment, the sodium oxide powder can fully react with the mixed liquid, accelerate the formation of precipitates, improve the reaction efficiency, ensure that the precipitate formation process is stable and controllable, and lay the foundation for the subsequent preparation of warm mix liquid.

[0061] In this embodiment, in preparation step 5), a 60% hydrochloric acid solution is added to the magnetic stirrer, where the weight of the hydrochloric acid solution is 10%-20% of the weight of the precipitate; the temperature of the stirring liquid is maintained between 80°C and 100°C, and the stirring is carried out at a speed of 200 rpm to 300 rpm for 4 hours.

[0062] By adding hydrochloric acid solution of a specific concentration and amount and stirring under appropriate temperature and stirring conditions, the precipitate and the hydrochloric acid solution can be fully reacted to form a stirring liquid with specific properties, further optimizing the chemical composition and properties of the warm mix liquid, making it more suitable for low-carbon cold-construction asphalt paving materials.

[0063] In this embodiment, in the preparation step 7), the upper layer of liquid is subjected to ultraviolet irradiation treatment for 12 hours to 18 hours, and when the viscosity reaches between 800 Pa.s and 1000 Pa.s, the upper layer of liquid forms a highly flexible warm mix liquid.

[0064] Ultraviolet irradiation treatment can effectively chemically modify the upper liquid to bring its viscosity into an appropriate range, thereby giving the warm mix liquid excellent properties such as high flexibility, meeting the special requirements of low-carbon cold-construction asphalt paving materials for warm mix liquid.

[0065] In this embodiment, in preparation step 7), the upper layer of liquid is placed in a precipitation container 100, which has a precipitation chamber 101. A conical cylinder 102 is formed in the middle of the precipitation chamber 101, which is larger at the bottom and smaller at the top. The outer periphery of the conical cylinder 102 has an outer reflective surface 103, and the outer reflective surface 103 and the inner sidewall of the precipitation chamber 101 form an annular precipitation area 104. The inner side of the conical cylinder 102 has an annular inner diffusing surface 105.

[0066] An ultraviolet lamp 106 emitting ultraviolet light is provided in a ring arrangement on the periphery of the precipitation container 100. The ultraviolet lamp 106 surrounds the periphery of the precipitation container 100. The upper layer of liquid is placed in the precipitation area 104. The ultraviolet light emitted by the ultraviolet lamp 106 irradiates the upper part of the upper layer of liquid in a ring shape from the outside to the inside. Part of the ultraviolet light passes through the outer reflecting surface 103 and irradiates the upper part of the upper layer of liquid from the inside to the outside. Part of the ultraviolet light passes through the conical cylinder 102, is diffusely reflected by the inner diffusing surface 105, and then is reflected from the inside to the outside in multiple directions to irradiate the upper part of the upper layer of liquid.

[0067] By utilizing the structural setting of the sedimentation container 100, ultraviolet rays can evenly irradiate the upper liquid from multiple directions, further improving the effect of ultraviolet treatment, enhancing the performance stability of the warm mix liquid, ensuring the consistency of the warm mix liquid in different batches of production, and improving the reliability of product quality.

[0068] The asphalt paving material mentioned in the present invention requires the addition and mixing of solid waste modified steel slag powder as one of the materials. The following are the steps for preparing the solid waste modified steel slag powder:

[0069] 1) Mix steel slag, coal gangue and mud, and grind them in a ball mill to form a grinding material;

[0070] 2) After adding sodium polystyrene sulfonate to the grinding material, re-grind for a set time to form a mixed powder. Sodium polystyrene sulfonate is an oily liquid;

[0071] 3) After the mixed powder is screened, a screened material is formed, and the screened material is placed in a vacuum drying oven and maintained at a set temperature and dried for a set time to form solid waste modified steel slag powder.

[0072] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for preparing a highly flexible warm mix liquid for low-carbon cold construction asphalt paving materials, characterized in that: The method comprises the following preparation steps: 1) Using animal fat to prepare initial oil; 2) After heating the initial oil to a set temperature, adding sulfuric acid solution to the initial oil, stirring and mixing the initial oil and sulfuric acid solution, and letting them stand for a set time to obtain a supernatant; 3) adding propylene glycol polycondensation emulsion and dialkyl phosphate to the upper liquid to form a mixed liquid, and placing the mixed liquid in a centrifuge for centrifugal treatment; 4) adding sodium oxide powder to the centrifuged mixed solution, and heating and stirring for a set time to obtain a precipitate; 5) placing the precipitate in a magnetic stirrer, adding a hydrochloric acid solution, and stirring the precipitate and the hydrochloric acid solution to form a stirring liquid; 6) The stirred liquid is allowed to stand for a set time until the stirred liquid separates into layers and an upper layer of liquid is formed on the upper portion of the stirred liquid; 7) Collecting the upper layer of liquid and treating the upper layer of liquid with ultraviolet light to form the highly flexible warm mixed liquid.

2. The method for preparing a highly flexible warm mix liquid for low-carbon cold construction asphalt paving materials according to claim 1, characterized in that: In the preparation step 1), after soaking the animal fat for a set time, the animal fat is heated to obtain initial oil.

3. The method for preparing a highly flexible warm mix liquid for low-carbon cold construction asphalt paving materials according to claim 1, characterized in that: After the initial grease is cooled, there are precipitated impurities at the bottom of the initial grease, and the impurities are removed.

4. The method for preparing a highly flexible warm mix liquid for low-carbon cold construction asphalt paving materials according to claim 1, characterized in that: In the preparation step 2), after the initial oil is heated to 90° C.-100° C., a 90% sulfuric acid solution is added to the initial oil, wherein the weight of the sulfuric acid solution accounts for 10%-20% of the weight of the initial oil; The initial oil and fat are stirred and mixed with the sulfuric acid solution for 20-30 minutes, and then allowed to stand for 36-48 hours to obtain the upper liquid.

5. The method for preparing a highly flexible warm mix liquid for low-carbon cold construction asphalt paving materials according to claim 1, characterized in that: In the preparation step 3), the weight of the propylene-vinyl condensation emulsion is 3%-5% of the weight of the upper liquid, and the weight of the dialkyl phosphate is 3%-5% of the weight of the upper liquid; the mixed liquid is centrifuged for 1 hour to 3 hours.

6. The method for preparing a highly flexible warm mix liquid for low-carbon cold construction asphalt paving material according to claim 1, characterized in that: In the preparation step 4), the weight of the sodium oxide powder is 1%-3% of the weight of the mixed solution.

7. The method for preparing a highly flexible warm mix liquid for low-carbon cold construction asphalt paving material according to claim 1, wherein: In the preparation step 4), the mixed solution to which the sodium oxide powder is added is heated to 90° C. to 100° C. and stirred for 10 to 20 minutes to obtain the precipitate.

8. The method for preparing a highly flexible warm mix liquid for low-carbon cold construction asphalt paving materials according to claim 1, characterized in that: In the preparation step 5), a 60% hydrochloric acid solution is added to the magnetic stirrer, wherein the weight of the hydrochloric acid solution is 10%-20% of the weight of the precipitate; The temperature of the stirring liquid is maintained between 80° C. and 100° C., and the stirring liquid is stirred at a speed of 200 r / min to 300 r / min for 4 hours.

9. The method for preparing a highly flexible warm mix liquid for low-carbon cold construction asphalt paving material according to claim 1, wherein: In the preparation step 7), the upper layer liquid is subjected to ultraviolet irradiation treatment for 12 hours to 18 hours, and when the viscosity reaches between 800 Pa.s and 1000 Pa.s, the upper layer liquid forms the highly flexible warm mix liquid.

10. The method for preparing a highly flexible warm mix liquid for low-carbon cold-construction asphalt paving material according to any one of claims 1 to 9, characterized in that: In the preparation step 7), the upper layer of liquid is placed in a precipitation container, wherein the precipitation container has a precipitation chamber, wherein a conical cylinder is formed in the middle of the precipitation chamber, which is larger at the bottom and smaller at the top; the outer periphery of the conical cylinder has an outer reflective surface, and the outer reflective surface and the inner sidewall of the precipitation chamber form an annular precipitation area; the inner side of the conical cylinder has an inner diffusion surface arranged in an annular manner; The outer periphery of the precipitation container is provided with an ultraviolet lamp arranged in a ring and emitting ultraviolet rays, and the ultraviolet lamp surrounds the outer periphery of the precipitation container; the upper layer of liquid is placed in the precipitation area, and the ultraviolet rays emitted by the ultraviolet lamp irradiate the upper part of the upper layer of liquid in a ring from the outside to the inside, part of the ultraviolet rays pass through the outer reflecting surface and irradiate the upper part of the upper layer of liquid from the inside to the outside, and part of the ultraviolet rays pass through the conical cylinder, are diffusely reflected by the inner diffusing surface, and are reflected in multiple directions from the inside to the outside to irradiate the upper part of the upper layer of liquid.

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