A fiber-hydrogel composite for improving the skid resistance of polar runways and a method for preparing the same

Abstract

The present application relates to a kind of fiber-hydrogel composite for improving the anti-skid performance of polar runway and its preparation method, by mixing hydrogel solution and regenerated fiber material, fiber-hydrogel composite solution is obtained.Fiber-hydrogel composite solution is poured into mold, and natural freezing is carried out;The uneven surface produced by natural freezing is polished and filled, so that the surface is flat, and continue natural freezing;After demolding, surface is rough texture construction, and fiber-hydrogel composite material with anti-skid performance is obtained.Compared with prior art, the preparation method of the present application is simple, whether it is new runway or repaired runway can be applied, suitable for large-scale construction operation.In addition, the regenerated fiber in the present application is sawdust fiber, cotton fiber, pulp fiber and other environmentally friendly plant fibers;Hydrogel is a common food additive ingredient, harmless to biology and environment, suitable for use in fragile environment such as polar region and plateau.

Description

Technical Field

[0001] This invention relates to the field of road and airport technology, and in particular to a fiber-hydrogel composite material for improving the anti-skid performance of polar runways and its preparation method. Background Technology

[0002] The polar regions are characterized by their frigid climate, snow-covered landscapes, and long periods of daylight or darkness. Furthermore, the extremely harsh environment makes them primarily destinations for scientific research and exploration. Therefore, constructing ice-based runways suitable for wheeled transport aircraft and capable of year-round operation in polar regions would effectively facilitate the convenient transport of personnel and supplies, significantly enhancing logistical support capabilities during polar scientific expeditions. Ice-based runways are a special type of runway, typically maintained at low temperatures by refrigeration equipment to ensure the smoothness and hardness of the ice surface. While these runways provide good ice quality, their insufficient anti-skid performance severely limits the range of runway sites, passively increasing construction site requirements and restricting the types of aircraft that can take off and land, as well as transport capabilities.

[0003] Chinese patent CN114411478A discloses a method for constructing a polar ice-based fiber-reinforced aircraft runway, including ice crushing, reinforcing gel spraying, basalt fiber cloth laying, and conventional gel spraying. The method involves mixing the crushed ice and reinforcing gel before spraying, improving the uniformity of the mixture and reducing fiber settling effects, resulting in high construction efficiency and low cost. However, the runway surface uses conventional gel and does not improve the anti-skid performance of the ice-based runway. Therefore, improving the anti-skid performance of ice runways is of great significance, but currently there is no effective method for improving anti-skid performance. Furthermore, due to the low adaptability of the natural ecosystem in polar regions and their high vulnerability to climate change, protection conditions are extremely demanding. Materials used to improve the anti-skid performance of ice-based runways in polar regions must be pollution-free and harmless. Therefore, the range of materials and construction methods that can be used in polar regions are very limited.

[0004] Therefore, there is an urgent need to study a material and method that can effectively improve the anti-slip performance of ice-based running tracks, while being environmentally friendly and harmless. Summary of the Invention

[0005] The purpose of this invention is to overcome the defects of the prior art and provide a fiber-hydrogel composite material and its preparation method for improving the anti-slip performance of polar runways. By using recycled fiber materials and environmentally friendly hydrogel materials, the anti-slip ability of ice surfaces can be effectively improved.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] This invention provides a method for preparing a fiber-hydrogel composite material for improving the anti-skid performance of polar runways, comprising the following steps:

[0008] S1: Hydrogel solution is prepared using polymer materials;

[0009] S2: Mix the hydrogel solution prepared in S1 with the regenerated fiber material to obtain a fiber-hydrogel composite material solution;

[0010] S3: Set up formwork in the construction area, pour the fiber-hydrogel composite material solution obtained in S2 into the mold, and allow it to freeze naturally after it is flush with the top surface of the mold.

[0011] S4: Grind and fill the uneven surface caused by natural freezing in S3 to make the surface smooth, and continue natural freezing;

[0012] S5: Demold the fiber-hydrogel composite material that has been frozen in S4, apply a rough texture to the surface, and put it into use.

[0013] Furthermore, in S1, the polymeric material includes one or more of polysaccharides, polypeptides, acrylic acid and its derivatives.

[0014] Furthermore, the amount of the polymer material added is 0.1 wt.% to 0.5 wt.%, which is used to enhance the fine texture of the runway and improve the distribution of regenerated fibers in water.

[0015] Furthermore, in S2, the recycled fiber material includes one or more of wood fiber, cotton fiber, and pulp fiber.

[0016] Furthermore, the amount of the regenerated fiber added is 2 wt.% to 20 wt.%, which is used to enhance the fine texture of the running track.

[0017] Furthermore, in S3, the height of the mold is 2cm.

[0018] Furthermore, in S3, the freezing temperature is below or equal to -5°C, and the freezing time is greater than or equal to 6 hours.

[0019] Furthermore, in S4, the freezing temperature is below or equal to -5°C, and the freezing time is greater than or equal to 2 hours.

[0020] Furthermore, in S5, the coarse texture construction method includes one or more of roughening and grooving combined.

[0021] The present invention also provides a fiber-hydrogel composite material for improving the anti-skid performance of polar runways.

[0022] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0023] 1. The functional layer manufactured by this invention is thin and quick to construct, which can improve the anti-skid performance of the runway in a short time; the preparation method is simple and can be applied to both new and repaired runways, making it suitable for large-scale construction operations.

[0024] 2. The water used in the freezing process of this invention can be river water, lake water, or seawater, which are readily available. The added materials are regenerated plant fibers and environmentally friendly hydrogels. The regenerated fibers are plant fibers that are environmentally friendly and do not cause pollution, such as wood fiber, cotton fiber, and pulp fiber. The hydrogels are common food additives that are harmless to organisms and do not cause pollution to the environment, making them suitable for use in environmentally fragile areas such as polar regions and plateaus.

[0025] 3. The preparation method of this invention is simple and effective, and can be widely used to improve the anti-skid ability of pavement in polar regions, frozen river surfaces, lake surfaces and sea surfaces in high-latitude cold regions, as well as the anti-skid ability of cement and asphalt pavement and soil surfaces in cold regions. Detailed Implementation

[0026] The following examples illustrate specific implementations of the present invention. These examples are carried out based on the solution described in the present invention, and provide detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following examples.

[0027] The present invention will be further illustrated below through specific embodiments. Any component models, material names, connection structures, manufacturing methods, materials, structures, or composition ratios not explicitly stated in this technical solution are considered common technical features disclosed in the prior art.

[0028] Example 1

[0029] This embodiment provides a method for preparing a fiber-hydrogel composite material for improving the anti-skid performance of polar runways, including the following steps:

[0030] S1: Mix 17kg of water with 90g of sodium alginate and stir thoroughly to obtain a sodium alginate solution; mix 900g of water with 10g of calcium chloride and stir thoroughly to obtain a calcium chloride solution; pour the calcium chloride solution into the sodium alginate solution and stir thoroughly to obtain a calcium alginate hydrogel solution.

[0031] S2: Add 2 kg of wood fiber to the calcium alginate hydrogel solution in S1 and stir thoroughly to obtain a wood fiber-calcium alginate composite solution;

[0032] S3: Set up formwork for the construction area with a length of 1m, a width of 1m, and a height of 2cm, and pour the wood fiber-calcium alginate composite solution from S2 into the mold and freeze it in an environment of -10℃ for 6 hours.

[0033] S4: Remove the uneven protrusions caused by natural freezing, and fill the pits with a wood fiber-calcium alginate composite solution to make the surface smooth. Continue to freeze in an environment of -10℃ for 2 hours.

[0034] S5: Demold the wood fiber-calcium alginate composite solution frozen in S4 and roughen the surface to obtain a wood fiber-calcium alginate composite material with anti-slip properties.

[0035] The materials obtained in Example 1 and Comparative Examples 1-4 were tested for surface anti-skid performance. The surface anti-skid performance of the construction area was evaluated in accordance with the current standard "Civil Aviation Airport Pavement Field Testing Procedure" (MH / T5110-2015). The surface BPN value was measured using a pendulum friction meter. The BPN value is an indicator reflecting the friction force between the tire and the pavement. The higher the BPN value, the higher the friction force between the tire and the pavement, and the better the anti-skid performance of the road surface.

[0036] The results of the friction test are shown in Table 1. As can be seen from Table 1, the BPN value of Example 1 was increased by 89.4% compared with that of Comparative Example 1 which did not undergo surface anti-slip combing. The BPN value of Example 1 was 49.8, which was significantly better than the other comparative examples.

[0037] Table 1. Friction Measurement Results

[0038] Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 BPN value 49.8 26.3 30.2 43.5 41.8

[0039] This invention produces a thin functional layer that allows for rapid construction and quick improvement of runway anti-skid performance. The preparation method is simple and applicable to both new and repaired runways, making it suitable for large-scale construction operations. Furthermore, the water used in the freezing process can be river water, lake water, or seawater, making it readily available. The additives are recycled plant fibers and environmentally friendly hydrogels. The recycled fibers are environmentally friendly plant fibers such as wood chips, cotton fibers, and pulp fibers; the hydrogels are common food additives, harmless to organisms and environmentally friendly, making them suitable for use in environmentally fragile areas such as polar regions and high-altitude plateaus. The simple and effective preparation method can be widely used to improve the anti-skid performance of pavements in polar regions, frozen river surfaces, lake surfaces, and sea surfaces in high-latitude cold regions, as well as cement and asphalt pavements and soil surfaces in cold regions.

[0040] Comparative Example 1

[0041] This comparative example provides a method for preparing a fiber-hydrogel composite material for improving the anti-skid performance of polar runways, comprising the following steps:

[0042] S1: Set up formwork for the construction area, with a length of 1m, a width of 1m, and a height of 2cm. Pour pure water into the formwork and freeze it in an environment of -10℃ for 6 hours.

[0043] S2: Remove the uneven protrusions caused by natural freezing, and fill the pits with pure water to make the surface smooth. Continue freezing in an environment of -10℃ for 2 hours.

[0044] S3: Remove the frozen pure water from the mold in S2.

[0045] Comparative Example 2

[0046] The operating conditions of this comparative example are basically the same as those of comparative example 1. The difference is that in this comparative example, the surface is roughened after demolding in S3.

[0047] Comparative Example 3

[0048] The operating conditions of this comparative example are basically the same as those of Example 1, except that in S2, 2 kg of water is added to the calcium alginate hydrogel solution in this comparative example, and the other steps are the same.

[0049] Comparative Example 4

[0050] The operating conditions of this comparative example are basically the same as those of Example 1. The difference is that S1 is omitted in this comparative example, and 18 kg of water and 2 kg of wood fiber are directly mixed in S2. The remaining steps are the same.

[0051] The above description of the embodiments is provided to enable those skilled in the art to understand and use the invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the invention should be within the protection scope of the present invention.

Claims

1. A method for preparing a fiber-hydrogel composite material for improving the anti-skid performance of polar runways, characterized in that, Includes the following steps: S1: A hydrogel solution is prepared using a polymeric material; the polymeric material includes one or more of polysaccharides, polypeptides, acrylic acid and its derivatives; the amount of the polymeric material added is 0.1 wt.%~0.5 wt.%. S2: The hydrogel solution prepared in S1 is mixed with the regenerated fiber material to obtain a fiber-hydrogel composite material solution; the regenerated fiber material includes one or more of wood fiber, cotton fiber, and pulp fiber; the amount of regenerated fiber added is 2wt.%~20wt.%. S3: Set up formwork in the construction area, pour the fiber-hydrogel composite material solution obtained in S2 into the mold, and allow it to freeze naturally after it is flush with the top surface of the mold. S4: Grind and fill the uneven surface caused by natural freezing in S3 to make the surface smooth, and continue natural freezing; S5: Demold the fiber-hydrogel composite material that has been frozen in S4, apply a rough texture to the surface, and put it into use.

2. The method for preparing a fiber-hydrogel composite material for improving the anti-skid performance of polar runways according to claim 1, characterized in that, In S3, the height of the mold is 2cm.

3. The method for preparing a fiber-hydrogel composite material for improving the anti-skid performance of polar runways according to claim 1, characterized in that, In S3, the freezing temperature is below or equal to -5℃, and the freezing time is greater than or equal to 6 hours.

4. The method for preparing a fiber-hydrogel composite material for improving the anti-skid performance of polar runways according to claim 1, characterized in that, In S4, the freezing temperature is below or equal to -5℃, and the freezing time is greater than or equal to 2 hours.

5. The method for preparing a fiber-hydrogel composite material for improving the anti-skid performance of polar runways according to claim 1, characterized in that, In S5, the coarse texture construction method includes one or more of roughening and grooving combined.

6. A fiber-hydrogel composite material for improving the anti-skid performance of polar runways, prepared by the method described in any one of claims 1-5.