Water-based pavement coating material and preparation method thereof

Abstract

The invention relates to the technical field of pavement coating material preparation, and particularly discloses a water-based pavement coating material and a preparation method thereof. The water-based pavement coating material is mainly prepared from the following raw materials: water, cellulose nanocrystals, sepiolite, an anti-cracking agent, butadiene rubber, a defoaming agent, a flatting agent, a dispersing agent, pigment, filler, a curing agent, tetrapod-like zinc oxide whiskers, water-based epoxy resin and an adhesion promoter. The preparation method comprises the following steps: mixing the anti-cracking agent, the butadiene rubber, the sepiolite, the tetrapod-like zinc oxide whiskers, the water-borne epoxy resin and 1 / 3-1 / 2 of water to obtain a premix; and mixing the premix with the cellulose nanocrystals, the defoaming agent, the dispersing agent, the pigment, the filler, the curing agent, the adhesion promoter, the flatting agent and the remaining water to obtain the coating. The water-based pavement coating material prepared by the invention is good in anti-cracking performance and good in wear resistance.

Description

Technical Field

[0001] The present application relates to the technical field of road surface covering material preparation, and more specifically, to a water-based road surface covering material and a preparation method thereof. Background Art

[0002] At present, in order to reduce traffic accidents in dangerous areas, colored anti-skid pavement is usually painted at places such as road intersections. The colored anti-skid pavement has rich colors, which can easily play the role of anti-skid and traffic warning, thereby reducing the accident rate.

[0003] Colored anti-slip pavement is typically coated with an anti-slip coating. Oil-based anti-slip coatings are more commonly used, while water-based anti-slip coatings are less common. Oil-based anti-slip coatings contain large amounts of volatile organic solvents, posing significant safety, environmental, and health risks. Therefore, the research and development and promotion of water-based anti-slip coatings are imperative.

[0004] When water-based anti-skid paint is applied to the road surface, the surface layer solidifies quickly, and the bottom solvent may crack the surface layer when it evaporates outward, so it may be prone to cracking. Once cracks appear on the road surface, with the continuous influence of natural factors, especially the infiltration of surface water, the road surface strength will decrease rapidly, and the road surface will soon develop cracks, potholes and other problems, seriously affecting the performance of the road surface.

[0005] Therefore, there is an urgent need to prepare a road covering material with good anti-cracking performance. Summary of the Invention

[0006] In order to further improve the crack resistance of a road surface covering material, the present application provides a water-based road surface covering material and a preparation method thereof.

[0007] In a first aspect, the present application provides a water-based pavement covering material, which adopts the following technical solution: A water-based pavement covering material is mainly made of the following raw materials in parts by weight: 20-30 parts of water, 1-2 parts of cellulose nanocrystals, 1-2 parts of sepiolite, 3-5 parts of anti-cracking agent, 3-5 parts of butadiene rubber, 1-2 parts of defoaming agent, 1-2 parts of leveling agent, 1-2 parts of dispersant, 5-10 parts of pigment, 20-25 parts of filler, 50-55 parts of curing agent, 3-5 parts of tetrapod-shaped zinc oxide whiskers, 100-110 parts of water-based epoxy resin, and 1-2 parts of adhesion promoter. The anti-cracking agent includes modified carbon fiber, steel-polypropylene hybrid fiber, and silicon carbide fiber. The preparation method of modified carbon fiber includes the following steps: S1, heating and calcining carbon fiber, cooling to obtain carbon fiber one; S2, mixing carbon fiber one and magnesium nitrate solution to obtain a mixed solution, adjusting the pH to alkaline, reacting, washing, drying, heating, and cooling to room temperature to obtain carbon fiber two; S3, ball-milling a calcium oxide expander, a calcium sulfoaluminate expander, and sodium silicate to obtain a mixture, and ball-milling the mixture with sepiolite to obtain a repair agent; S4, immersing carbon fiber two in acrylic emulsion to obtain carbon fiber three; S5, mixing carbon fiber three and the repair agent, and drying to obtain.

[0008] By adopting the above technical solution, the raw materials of the water-based pavement covering material and the ratio of each raw material are adjusted, and the water-based pavement covering material thus prepared has better performance. The pigment, filler, anti-cracking agent, sepiolite, and four-needle zinc oxide whisker cooperate with each other and are dispersed in the water-based epoxy resin under the action of the dispersant and other raw materials, and are coated on the road surface. The formed coating has better wear resistance and splitting resistance. The addition of the adhesion promoter facilitates the cooperation with other components of the water-based pavement covering material to further improve the performance of the coating. The anti-cracking agent cooperates with sepiolite and four-needle zinc oxide whiskers to improve the wear resistance of the coating. The anti-cracking agent is obtained by compounding three components: modified carbon fiber, steel-polypropylene hybrid fiber and silicon carbide fiber. The introduction of the fiber facilitates the formation of a three-dimensional random support network in the water-based pavement covering material, thereby reducing the shrinkage plasticity of the coating. The shrinkage energy of the water-based pavement covering material is dispersed into the fibers in the water-based pavement covering material, thereby increasing the toughness of the water-based pavement covering material and reducing the cracks in the water-based pavement covering material. When the fiber support system is interwoven with the sepiolite, the effect of uniform water distribution is improved, and cracks caused by sedimentation are reduced. The introduction of fibers makes it easier to resist the occurrence of cracks, thereby reducing the source of cracks and reducing the size of cracks, resulting in a significant reduction in the stress intensity at the crack end, alleviating the situation where the stress at the crack end is too concentrated. The steel-polypropylene hybrid fiber and silicon carbide fiber have good thermal conductivity, which is convenient for forming a heat conduction path with the four-needle zinc oxide whisker, thereby reducing the cracking of the coating due to thermal expansion and contraction. The modified carbon fiber adopts a homemade method. First, a magnesium oxide layer is coated on the outer layer of the carbon fiber. On the one hand, the coating of the magnesium oxide layer is convenient for improving the roughness of the outer layer of the carbon fiber. On the other hand, magnesium oxide has good thermal conductivity, which helps to further improve the thermal conductivity of the outer layer of the carbon fiber, so as to further improve the thermal conduction path in the coating. Subsequently, a repair agent is adhered to the surface of the carbon fiber. The calcium ions in the calcium oxide expander in the repair agent dissolve in water and form calcium carbonate crystals with carbon dioxide in the environment, which is convenient for reducing the gaps in the coating and improving the crack resistance of the coating.

[0009] Preferably, the anti-cracking agent is composed of modified carbon fiber, steel-polypropylene hybrid fiber, and silicon carbide fiber in a mass ratio of (5-6):(2-3):(3-4).

[0010] By adopting the above technical solution, the anti-cracking agent is obtained by compounding three components: modified carbon fiber, steel-polypropylene hybrid fiber, and silicon carbide fiber. The ratio of the three components is adjusted to achieve the optimal ratio. The amount of modified carbon fiber added is greater than the amount of steel-polypropylene hybrid fiber and silicon carbide fiber added, so as to better exert the anti-cracking effect of the anti-cracking agent and improve the anti-cracking performance of the coating.

[0011] Preferably, the filler is composed of talc powder, boron nitride, and wollastonite powder in a mass ratio of (5-6):(2-3):(2-3).

[0012] By adopting the above technical solution, the filler is obtained by compounding three components: talcum powder, boron nitride, and wollastonite powder. The ratio of the three components is adjusted to achieve the optimal ratio. Talc powder is a scaly crystal and contains fibrous substances. It is light and soft. It can absorb tensile stress in water-based pavement covering materials and reduce the occurrence of cracks. Wollastonite powder is needle-shaped or fibrous, which is convenient for reinforcement and reduces crack sensitivity. Boron nitride has good thermal conductivity and good wear resistance, and is easy to combine with four-needle zinc oxide whiskers and anti-cracking agents in the covering material to improve the anti-cracking performance of the covering material.

[0013] Preferably, the steel-polypropylene hybrid fiber is composed of steel fiber and polypropylene fiber in a mass ratio of (5-6): (1-2).

[0014] By adopting the above technical solution, the mass ratio of steel fiber and polypropylene fiber in the steel-polypropylene hybrid fiber is adjusted to achieve an optimal ratio of the two components. The steel fiber has good thermal conductivity, which facilitates better mixing with the silicon carbide fiber, reducing the heat accumulated in the coating during the drying process. Under the condition of reasonable ratio, the high elastic modulus steel fiber and the low elastic modulus polypropylene fiber are mixed and incorporated into the water-based pavement covering material, so that the water-based pavement covering material combines the advantages of the two fibers and has better toughness.

[0015] Preferably, in step S2, the mass ratio of carbon fiber 1 to magnesium nitrate solution is (1-2):(3-4).

[0016] By adopting the above technical solution, the masses of the two components, carbon fiber 1 and magnesium nitrate solution, are adjusted to achieve an optimal ratio of the two components, which facilitates the control of the content of magnesium oxide on the surface of the carbon fiber, increases the roughness of the carbon fiber surface, and facilitates better subsequent adhesion of the repair agent, thereby playing the role of the repair agent in the water-based pavement covering material.

[0017] Preferably, the immersion time in step S4 is 15-20 minutes.

[0018] By adopting the above technical solution, the immersion time is adjusted, which makes it easier to control the content of acrylic emulsion on the carbon fiber surface and facilitate better adhesion of the repair agent.

[0019] Preferably, in step S5, the mass ratio of carbon fiber III to the repairing agent is (2-3):(1-2).

[0020] By adopting the above technical solution, the mass ratio of carbon fiber 3 and repair agent is adjusted, which makes it easier to control the amount of repair agent coating on the surface of carbon fiber 3, so as to better play the role of the repair agent in the water-based pavement covering material, thereby improving the anti-cracking performance of the water-based pavement covering material.

[0021] Preferably, the defoaming agent is composed of polyether-modified silicone and polysiloxane in a mass ratio of (3-5): (1-2).

[0022] By adopting the above technical solution, the defoaming agent is obtained by compounding two components: polyether-modified silicone and polysiloxane. The ratio of the two components is adjusted to achieve the best ratio, so as to better play the defoaming effect in the coating material, reduce the amount of foam in the coating material, and better improve the performance of the coating material.

[0023] Preferably, the dispersant is composed of sodium polyacrylate and sodium polymethacrylate in a mass ratio of (4-5):(2-3).

[0024] By adopting the above technical solution, the addition of the dispersant facilitates the effective dispersion of inorganic pigments and fillers, and adsorbs on the surface of the pigments and fillers, thereby modifying the surface hydrophobicity of the hydrophilic pigments and fillers. At the same time, it has good compatibility with the polymer resin. The two components of sodium polyacrylate and sodium polymethacrylate cooperate with each other, which is convenient for cooperation with raw materials such as adhesion promoters and anti-cracking agents in the coating material, thereby improving the performance of the coating material.

[0025] In a second aspect, the present application provides a method for preparing a water-based pavement covering material, which adopts the following technical solution: A method for preparing a water-based pavement covering material comprises the following steps: (1) Mixing an anti-cracking agent, butadiene rubber, sepiolite, tetrapod-shaped zinc oxide whiskers, a waterborne epoxy resin, and 1 / 3 to 1 / 2 of water to obtain a premix; (2) The premix obtained in step (1) is mixed with cellulose nanocrystals, a defoaming agent, a dispersant, a pigment, a filler, a curing agent, an adhesion promoter, a leveling agent, and the remaining water to obtain a product.

[0026] By adopting the above technical solution, the preparation method of the water-based pavement covering material is simple, and the prepared water-based pavement covering material has good anti-cracking performance, good adhesion, and good storage stability.

[0027] In summary, this application has the following beneficial effects: 1. The pigment, filler, anti-cracking agent, sepiolite, and tetrapod-shaped zinc oxide whiskers in the water-based pavement covering material of the present application cooperate with each other and are dispersed in a water-based epoxy resin under the action of a dispersant and other raw materials. The coating formed when applied to the road surface has excellent wear resistance and splitting resistance. The addition of an adhesion promoter facilitates cooperation with other components of the water-based pavement covering material, thereby further improving the performance of the water-based pavement covering material. The anti-cracking agent cooperates with the sepiolite and tetrapod-shaped zinc oxide whiskers to improve the wear resistance of the water-based pavement covering material.

[0028] 2. The anti-cracking agent in the water-based pavement covering material of the present application is obtained by compounding three components: modified carbon fiber, steel-polypropylene hybrid fiber and silicon carbide fiber. The introduction of fibers facilitates the formation of a three-dimensional random support network in the water-based pavement covering material, thereby reducing the shrinkage plasticity of the water-based pavement covering material. The shrinkage energy of the water-based pavement covering material is dispersed into the fibers in the water-based pavement covering material, thereby increasing the toughness of the water-based pavement covering material and reducing the occurrence of cracks in the coating. At the same time, the support system composed of fibers facilitates interweaving with sepiolite, thereby improving the uniform distribution of moisture and reducing cracks caused by sedimentation. The introduction of fibers facilitates the resistance to the occurrence of cracks, thereby reducing the source of cracks and reducing the size of cracks, resulting in a significant reduction in the stress intensity at the crack end and alleviating the situation where the stress at the crack end is too concentrated. DETAILED DESCRIPTION

[0029] The present application is further described in detail below with reference to the embodiments.

[0030] For ease of understanding of the present application, the present application will be described more fully below. The present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0032] Unless otherwise specified, the raw materials used in the examples and comparative examples of the present application are all commercially available.

[0033] Preparation example of modified carbon fiber Preparation Example 1 The preparation method of the modified carbon fiber of this preparation example comprises the following steps: S1. After washing the carbon fiber with distilled water, degreasing and dehydrating with acetone, the carbon fiber was placed in a heating furnace and heated to 900°C under nitrogen protection at a heating rate of 15°C / min. A mixed gas was introduced and kept warm for 20 minutes. The carbon fiber was cooled to room temperature at a cooling rate of 10°C / min to obtain carbon fiber 1. S2. Mixing carbon fiber 1 and magnesium nitrate solution to obtain a mixed solution, adjusting the pH to 9 with sodium hydroxide solution, reacting for 2 hours, washing with distilled water, and then drying in a vacuum drying oven at 80°C. The dried carbon fiber 1 is placed in a heating furnace, protected with nitrogen, heated to 350°C, kept warm for 5 hours, and cooled to room temperature to obtain carbon fiber 2; wherein the heating rate is 10°C / min, and the cooling rate is 15°C / min; the molar concentration of the magnesium nitrate solution is 1 mol / L, and the molar concentration of the sodium hydroxide solution is 1 mol / L; the mass ratio of carbon fiber 1 to magnesium nitrate solution is 1:3; S3. Calcium oxide expansion agent, calcium sulfoaluminate expansion agent, and sodium silicate are ball-milled in a mass ratio of 1:1:1 to obtain a mixture, and the mixture is ball-milled with sepiolite to obtain a repair agent; the mass ratio of calcium oxide expansion agent to sepiolite is 1:0.5; the manufacturer of sodium silicate is Tianjin Yongda Chemical Reagent Co., Ltd.; the manufacturer of sepiolite is Hebei Hongli Sepiolite Co., Ltd.; the calcium sulfoaluminate expansion agent is commercially available; the calcium oxide expansion agent is commercially available; S4, immersing the carbon fiber 2 in an acrylic emulsion to obtain a carbon fiber 3; the immersion time is 15 minutes; the acrylic emulsion is a styrene acrylic emulsion, and the manufacturer of the styrene acrylic emulsion is Zhengzhou Lishengyuan Chemical Products Co., Ltd.; S5. Mix the carbon fiber III and the repair agent, and dry them to obtain the product. The mass ratio of the carbon fiber III and the repair agent is 2:1.

[0034] Preparation Example 2 The preparation method of the modified carbon fiber of this preparation example comprises the following steps: S1. After washing the carbon fiber with distilled water, degreasing and dehydrating with acetone, the carbon fiber was placed in a heating furnace and heated to 900°C under nitrogen protection at a heating rate of 15°C / min. A mixed gas was introduced and kept warm for 20 minutes. The carbon fiber was cooled to room temperature at a cooling rate of 10°C / min to obtain carbon fiber 1. S2. Mixing carbon fiber 1 and magnesium nitrate solution to obtain a mixed solution, adjusting the pH to 9 with sodium hydroxide solution, reacting for 2 hours, washing with distilled water, and then drying in a vacuum drying oven at 80°C. The dried carbon fiber 1 is placed in a heating furnace, protected with nitrogen, heated to 350°C, kept warm for 5 hours, and cooled to room temperature to obtain carbon fiber 2; wherein the heating rate is 10°C / min, and the cooling rate is 15°C / min; the molar concentration of the magnesium nitrate solution is 1 mol / L, and the molar concentration of the sodium hydroxide solution is 1 mol / L; the mass ratio of carbon fiber 1 to magnesium nitrate solution is 2:4; S3. Calcium oxide expansion agent, calcium sulfoaluminate expansion agent, and sodium silicate are ball-milled in a mass ratio of 1:1:1 to obtain a mixture, and the mixture is ball-milled with sepiolite to obtain a repair agent; the mass ratio of calcium oxide expansion agent to sepiolite is 1:0.5; the manufacturer of sodium silicate is Tianjin Yongda Chemical Reagent Co., Ltd.; the manufacturer of sepiolite is Hebei Hongli Sepiolite Co., Ltd.; the calcium sulfoaluminate expansion agent is commercially available; the calcium oxide expansion agent is commercially available; S4, immersing the carbon fiber 2 in an acrylic emulsion to obtain a carbon fiber 3; the immersion time is 20 minutes; the acrylic emulsion is a styrene acrylic emulsion, and the manufacturer of the styrene acrylic emulsion is Zhengzhou Lishengyuan Chemical Products Co., Ltd.; S5. Mix the carbon fiber III and the repair agent, and dry them to obtain the product. The mass ratio of the carbon fiber III and the repair agent is 3:2.

[0035] Preparation Example 3 The preparation method of the modified carbon fiber of this preparation example comprises the following steps: S1. After washing the carbon fiber with distilled water, degreasing and dehydrating with acetone, the carbon fiber was placed in a heating furnace and heated to 900°C under nitrogen protection at a heating rate of 15°C / min. A mixed gas was introduced and kept warm for 20 minutes. The carbon fiber was cooled to room temperature at a cooling rate of 10°C / min to obtain carbon fiber 1. S2. Mix the carbon fiber 1 and the magnesium nitrate solution to obtain a mixed solution, adjust the pH to 9 with a sodium hydroxide solution, react for 2 hours, wash with distilled water, and then place it in a vacuum drying oven at 80°C for drying. Place the dried carbon fiber 1 in a heating furnace, protect it with nitrogen, heat it to 350°C, keep it warm for 5 hours, and cool it to room temperature to obtain the product; wherein, the heating rate is 10°C / min, and the cooling rate is 15°C / min; the molar concentration of the magnesium nitrate solution is 1 mol / L, and the molar concentration of the sodium hydroxide solution is 1 mol / L; the mass ratio of the carbon fiber 1 and the magnesium nitrate solution is 1:3.

[0036] Preparation Example 4 The preparation method of the modified carbon fiber of this preparation example comprises the following steps: S1. After washing the carbon fiber with distilled water, degreasing and dehydrating with acetone, the carbon fiber was placed in a heating furnace and heated to 900°C under nitrogen protection at a heating rate of 15°C / min. A mixed gas was introduced and kept warm for 20 minutes. The carbon fiber was cooled to room temperature at a cooling rate of 10°C / min to obtain carbon fiber 1. S2. Mixing carbon fiber 1 and magnesium nitrate solution to obtain a mixed solution, adjusting the pH to 9 with sodium hydroxide solution, reacting for 2 hours, washing with distilled water, and then drying in a vacuum drying oven at 80°C. The dried carbon fiber 1 is placed in a heating furnace, protected with nitrogen, heated to 350°C, kept warm for 5 hours, and cooled to room temperature to obtain carbon fiber 2; wherein the heating rate is 10°C / min, and the cooling rate is 15°C / min; the molar concentration of the magnesium nitrate solution is 1 mol / L, and the molar concentration of the sodium hydroxide solution is 1 mol / L; the mass ratio of carbon fiber 1 to magnesium nitrate solution is 1:3; S3. Calcium oxide expansion agent, calcium sulfoaluminate expansion agent and sodium silicate are mixed by ball milling in a mass ratio of 1:1:1 to obtain a repair agent; the manufacturer of sodium silicate is Tianjin Yongda Chemical Reagent Co., Ltd.; the calcium sulfoaluminate expansion agent is commercially available; the calcium oxide expansion agent is commercially available; S4, immersing the carbon fiber 2 in an acrylic emulsion to obtain a carbon fiber 3; the immersion time is 15 minutes; the acrylic emulsion is a styrene acrylic emulsion, and the manufacturer of the styrene acrylic emulsion is Zhengzhou Lishengyuan Chemical Products Co., Ltd.; S5. Mix the carbon fiber III and the repair agent, and dry them to obtain the product. The mass ratio of the carbon fiber III and the repair agent is 2:1.

[0037] Example Example 1 The water-based pavement covering material of this embodiment includes the following raw materials by weight: 20 kg of water, 1 kg of cellulose nanocrystals, 1 kg of sepiolite, 3 kg of anti-cracking agent, 3 kg of butadiene rubber, 1 kg of defoaming agent, 1 kg of leveling agent, 1 kg of dispersant, 5 kg of pigment, 20 kg of filler, 50 kg of curing agent, 3 kg of tetrapod-shaped zinc oxide whiskers, 100 kg of water-based epoxy resin, and 1 kg of adhesion promoter. The anti-cracking agent is composed of modified carbon fiber, steel-polypropylene hybrid fiber and silicon carbide fiber in a mass ratio of 1:1:1, and the steel-polypropylene hybrid fiber is composed of steel fiber and polypropylene fiber in a mass ratio of 5:1; the modified carbon fiber is prepared in Preparation Example 1; the manufacturer of cellulose nanocrystals is Zhejiang Jinjiahao Green Nanomaterials; the manufacturer of sepiolite is Hebei Hongli Sepiolite Wool Co., Ltd.; the pigment is titanium dioxide, and the particle size of titanium dioxide is 5μm; the particle size of butadiene rubber is 10μm; the defoaming agent is composed of polyether modified silicone and polysiloxane in a mass ratio of 3:1, the manufacturer of polysiloxane is Dongguan Centennial Hongtu Chemical Technology Co., Ltd., and the manufacturer of polyether modified silicone is Hubei Longsheng Sihai New Materials Co., Ltd.; the leveling agent is polyether modified polysiloxane. Methylsiloxane, manufactured by Guangdong Nuoyi Chemical Co., Ltd.; the dispersant is composed of sodium polyacrylate and sodium polymethacrylate in a mass ratio of 4:2, the weight average molecular weight of sodium polymethacrylate is 2000, and the weight average molecular weight of sodium polyacrylate is 1500; the filler is composed of talc powder, boron nitride, and wollastonite powder in a mass ratio of 5:2:2; the curing agent is isophorone diamine, manufactured by Hubei Keward Chemical Co., Ltd.; the manufacturer of tetrapod-shaped zinc oxide whiskers is Hangzhou Jikang New Materials Co., Ltd.; the water-based epoxy resin is bisphenol A epoxy resin, and the manufacturer of bisphenol A epoxy resin is Guangdong Wengjiang Chemical Reagent Co., Ltd.; the adhesion promoter is propyltrimethoxysilane, and the manufacturer of propyltrimethoxysilane is Guangzhou Nantai Chemical Co., Ltd.

[0038] The method for preparing the water-based pavement covering material of this embodiment comprises the following steps: (1) Mixing an anti-cracking agent, butadiene rubber, sepiolite, tetrapod-shaped zinc oxide whiskers, a waterborne epoxy resin, and 1 / 3 of water to obtain a premix; (2) The premix obtained in step (1) is mixed with cellulose nanocrystals, a defoaming agent, a dispersant, a pigment, a filler, a curing agent, an adhesion promoter, a leveling agent, and the remaining water to obtain a product.

[0039] Example 2 The water-based road covering material of this embodiment differs from that of Example 1 in that it comprises the following raw materials by weight: 30 kg of water, 2 kg of cellulose nanocrystals, 2 kg of sepiolite, 5 kg of an anti-cracking agent, 5 kg of butadiene rubber, 2 kg of a defoamer, 2 kg of a leveling agent, 1 kg of a dispersant, 10 kg of a pigment, 25 kg of a filler, 55 kg of a curing agent, 5 kg of tetrapod-shaped zinc oxide whiskers, 110 kg of a water-based epoxy resin, and 2 kg of an adhesion promoter. The filler comprises talc, boron nitride, and wollastonite powder in a mass ratio of 6:3:3; the steel-polypropylene hybrid fiber comprises steel fiber and polypropylene fiber in a mass ratio of 6:2; the defoamer comprises polyether-modified silicone and polysiloxane in a mass ratio of 5:2; and the dispersant comprises sodium polyacrylate and sodium polymethacrylate in a mass ratio of 5:3. The modified carbon fiber is prepared according to Preparation Example 2.

[0040] The method for preparing the water-based pavement covering material of this embodiment comprises the following steps: (1) Mixing an anti-cracking agent, butadiene rubber, sepiolite, tetrapod-shaped zinc oxide whiskers, a waterborne epoxy resin, and 1 / 2 of water to obtain a premix; (2) The premix obtained in step (1) is mixed with cellulose nanocrystals, a defoaming agent, a dispersant, a pigment, a filler, a curing agent, an adhesion promoter, a leveling agent, and the remaining water to obtain a product.

[0041] Example 3 The water-based pavement covering material of this embodiment differs from that of Example 2 in that the anti-cracking agent is composed of modified carbon fiber, steel-polypropylene hybrid fiber, and silicon carbide fiber in a mass ratio of 5:2:3.

[0042] Example 4 The water-based pavement covering material of this embodiment differs from that of Example 2 in that the anti-cracking agent is composed of modified carbon fiber, steel-polypropylene hybrid fiber, and silicon carbide fiber in a mass ratio of 6:3:4.

[0043] Comparative Example Comparative Example 1 The water-based pavement covering material of this comparative example differs from that of Example 1 in that no anti-cracking agent is added.

[0044] Comparative Example 2 The water-based pavement covering material of this comparative example is different from that of Example 1 in that the anti-cracking agent is composed of carbon fiber, steel-polypropylene hybrid fiber, and silicon carbide fiber in a mass ratio of 1:1:1.

[0045] Comparative Example 3 The water-based pavement covering material of this comparative example is different from that of Example 1 in that the anti-cracking agent is modified carbon fiber.

[0046] Comparative Example 4 The water-based pavement covering material of this comparative example is different from that of Example 1 in that the anti-cracking agent is composed of steel-polypropylene hybrid fiber and silicon carbide fiber in a mass ratio of 1:1.

[0047] Comparative Example 5 The water-based road covering material of this comparative example is different from that of Example 1 in that the modified carbon fiber is prepared according to Preparation Example 3.

[0048] Comparative Example 6 The water-based road covering material of this comparative example is different from that of Example 1 in that the modified carbon fiber is prepared according to Preparation Example 4.

[0049] Performance testing Storage stability test: The waterborne pavement covering materials prepared in Examples 1-4 were tested for storage stability according to the test method in GB / T 6753.3-1986 “Test method for storage stability of coatings”. The test results are shown in Table 1.

[0050] Adhesion Test: The water-based pavement covering materials prepared in Examples 1-4 and Comparative Examples 1-6 were applied to steel plates and dried at room temperature for 30 minutes. The adhesion of the covering materials was tested according to the test method in GB / T 9286-1998 "Scratch Test for Paint and Varnish Films". The test results are shown in Table 1.

[0051] Cracking resistance test: The water-based pavement covering materials prepared in Examples 1-4 and Comparative Examples 1-6 were applied to steel plates. After 24 hours of application, the surface condition of the coatings was observed and the coating thickness was recorded. The test results are shown in Table 1.

[0052] Table 1 Performance test results of waterborne pavement covering materials of Examples 1-4 and Comparative Examples 1-6

[0053] From the data in Table 1, it can be seen that the water-based pavement covering materials prepared in Examples 1-4 have better adhesion, better storage stability, and better crack resistance.

[0054] This specific embodiment is merely an explanation of the present application and is not intended to limit the present application. After reading this specification, those skilled in the art may make modifications to the embodiment without any creative contribution as needed.

Claims

1. A water-based road covering material, characterized in that: The invention is mainly made of the following raw materials in parts by weight: 20-30 parts of water, 1-2 parts of cellulose nanocrystals, 1-2 parts of sepiolite, 3-5 parts of anti-cracking agent, 3-5 parts of butadiene rubber, 1-2 parts of defoaming agent, 1-2 parts of leveling agent, 1-2 parts of dispersant, 5-10 parts of pigment, 20-25 parts of filler, 50-55 parts of curing agent, 3-5 parts of tetrapod-shaped zinc oxide whiskers, 100-110 parts of water-based epoxy resin, and 1-2 parts of adhesion promoter. The anti-cracking agent includes modified carbon fiber, steel-polypropylene hybrid fiber and silicon carbide fiber. The preparation method comprises the following steps: S1, heating and calcining carbon fiber, cooling to obtain carbon fiber one; S2, mixing carbon fiber one and magnesium nitrate solution to obtain a mixed solution, adjusting the pH to alkaline, reacting, washing, drying, heating, and cooling to room temperature to obtain carbon fiber two; S3, ball-milling and mixing a calcium oxide expansion agent, a calcium sulfoaluminate expansion agent, and sodium silicate to obtain a mixture, and ball-milling and mixing the mixture with sepiolite to obtain a repairing agent; S4, immersing carbon fiber two in acrylic emulsion to obtain carbon fiber three; S5, mixing carbon fiber three and the repairing agent, and drying to obtain the product.

2. The water-based pavement covering material according to claim 1, characterized in that: The anti-cracking agent is composed of modified carbon fiber, steel-polypropylene hybrid fiber and silicon carbide fiber in a mass ratio of (5-6): (2-3): (3-4).

3. The water-based pavement covering material according to claim 1, characterized in that: The filler is composed of talc powder, boron nitride and wollastonite powder in a mass ratio of (5-6):(2-3):(2-3).

4. The water-based road covering material according to claim 1, characterized in that: The steel-polypropylene hybrid fiber is composed of steel fiber and polypropylene fiber in a mass ratio of (5-6):(1-2).

5. The water-based pavement covering material according to claim 1, characterized in that: In step S2, the mass ratio of carbon fiber 1 to magnesium nitrate solution is (1-2):(3-4).

6. The water-based road covering material according to claim 1, characterized in that: The immersion time in step S4 is 15-20 minutes.

7. The water-based road covering material according to claim 1, characterized in that: In step S5, the mass ratio of carbon fiber III to the repairing agent is (2-3):(1-2).

8. The water-based pavement covering material and preparation method thereof according to claim 1, characterized in that: The defoaming agent is composed of polyether-modified silicone and polysiloxane in a mass ratio of (3-5): (1-2).

9. The water-based road covering material according to claim 1, characterized in that: The dispersant is composed of sodium polyacrylate and sodium polymethacrylate in a mass ratio of (4-5):(2-3).

10. A method for preparing a water-based pavement covering material according to any one of claims 1 to 9, characterized in that: The steps include: (1) Mixing an anti-cracking agent, butadiene rubber, sepiolite, tetrapod-shaped zinc oxide whiskers, a waterborne epoxy resin, and 1 / 3 to 1 / 2 of water to obtain a premix; (2) The premix obtained in step (1) is mixed with cellulose nanocrystals, a defoaming agent, a dispersant, a pigment, a filler, a curing agent, an adhesion promoter, a leveling agent, and the remaining water to obtain a product.

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