Geogrid composite material and method for manufacturing the same

Abstract

The present application relates to a kind of geogrid composite material and its preparation method, the composite material made includes mixed fiber filament and alkali-resistant coating, the mixed fiber filament is in basalt fiber filament and adds a certain proportion of glass fiber filament and is mixed and woven, the alkali-resistant coating includes first alkali-resistant coating and second alkali-resistant coating, the first alkali-resistant coating is coated in the outer surface of the glass fiber filament, the second alkali-resistant coating is coated in the outer surface of the mixed fiber filament, the first alkali-resistant coating and second alkali-resistant coating all contain inorganic compound alkali-resistant particle.The present application is by first glass fiber and is immersed in alkali-resistant coating, then the whole mixed fiber is immersed in alkali-resistant coating, reduce the corrosion tendency in advance due to basalt fiber and glass fiber alkali resistance difference to bring to geotechnical product, by reasonably controlling the amount of glass fiber and optimizing the concentration of active particle (zirconium oxide) in the immersion liquid, obtain high-quality and low-cost geogrid composite material.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of geogrid composite material preparation, in particular to a geogrid composite material and a preparation method thereof. BACKGROUND

[0002] In the production of geogrids, basalt fibers have better corrosion resistance than glass fibers, and their physical properties are also better than those of glass fibers. Moreover, the production scale of basalt fibers is also on the rise. Therefore, basalt fibers are increasingly used to replace glass fibers to produce geogrids. Glass fibers have mature products in the market and have certain advantages in price. Therefore, it is a common practice in the production to add a certain proportion of glass fibers to basalt fibers.

[0003] For use conditions with high alkali resistance requirements, the raw materials of basalt fiber geogrids need to be first coated with an alkali-resistant coating. However, the service life of geogrids made of basalt fibers mixed with glass fibers is lower than that of geogrids made of pure basalt fibers. The reason is that the chemical corrosion rate of the added proportion of glass fibers is faster than that of basalt fibers, which causes the entire product to corrode prematurely. SUMMARY

[0004] To solve the above problems, the present application provides a geogrid composite material and a preparation method thereof. In the basalt fibers mixed with glass fibers, the glass fibers are first coated with an alkali-resistant coating, and then the mixed fibers are coated with an alkali-resistant coating, thereby reducing the premature corrosion caused by the difference in alkali resistance between basalt fibers and glass fibers.

[0005] The purpose of the present application is achieved by the following technical solutions.

[0006] A geogrid composite material comprises mixed fiber yarns and an alkali-resistant coating. The mixed fiber yarns are made by mixing a certain proportion of glass fiber yarns with basalt fiber yarns. The alkali-resistant coating comprises a first alkali-resistant coating and a second alkali-resistant coating. The first alkali-resistant coating is coated on the outer surface of the glass fiber yarns, and the second alkali-resistant coating is coated on the outer surface of the mixed fiber yarns. Both the first alkali-resistant coating and the second alkali-resistant coating contain inorganic compound alkali-resistant particles.

[0007] Preferably, in the above geogrid composite material, the inorganic compound alkali-resistant particles are zirconium oxide.

[0008] Preferably, in the above geogrid composite material, the weight of the glass fiber yarns is not greater than the weight of the basalt fiber yarns.

[0009] Preferably, in the geogrid composite material, the glass fiber filaments account for 18-45%, preferably 30-40% of the total weight of the glass fiber filaments and the basalt fiber filaments.

[0010] Preferably, in the geogrid composite material, the inorganic alkali-resistant particle concentration in the first alkali-resistant coating layer is higher than that in the second alkali-resistant coating layer.

[0011] The application also provides a preparation method of the geogrid composite material, which comprises the following steps:

[0012] S1, preparation of an alkali-resistant coating layer for glass fiber filaments

[0013] The glass fiber filaments are selected, and an alkali-resistant impregnating agent is applied to the glass fiber filaments and cured to obtain glass fiber filaments coated with a first alkali-resistant coating layer;

[0014] S2, mixing of fibers

[0015] The basalt fiber filaments and the glass fiber filaments coated with the first alkali-resistant coating layer obtained in step S1 are mixed to obtain mixed fiber filaments;

[0016] S3, preparation of an alkali-resistant coating layer for mixed fiber filaments

[0017] The mixed fiber filaments obtained in step S2 are impregnated with an alkali-resistant impregnating agent and cured to obtain mixed fiber filaments coated with a second alkali-resistant coating layer.

[0018] Preferably, in the preparation method, the alkali-resistant impregnating agent in steps S1 and S3 is an epoxy resin impregnating agent containing zirconium oxide.

[0019] Optionally, in the preparation method, the amount of zirconium oxide emulsion added in the alkali-resistant impregnating agent in steps S1 and S3 is 6-11% by mass.

[0020] Optionally, in the preparation method, the amount of zirconium oxide emulsion added in the alkali-resistant impregnating agent in step S1 is 13-22% by mass, and further, the amount of zirconium oxide emulsion added in the alkali-resistant impregnating agent in step S3 is 6-11% by mass.

[0021] The application has the following advantages:

[0022] The geogrid composite material and the preparation method thereof provided by the present application, in the basalt fiber mixed with glass fiber, the alkali-resistant coating layer is coated on the glass fiber in advance, and then the alkali-resistant coating layer is coated on the mixed fiber as a whole, so that the corrosion tendency of the geotechnical product caused by the difference in alkali resistance between the basalt fiber and the glass fiber is reduced, the amount of the glass fiber is reasonably controlled, and the ZrO2 particle concentration of the primary and secondary immersion liquids is optimized, so that the high-quality and low-cost geogrid composite material is obtained. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The geogrid composite material of the present application is schematically shown.

[0024] Figure 2 The preparation process of the present application is shown. DETAILED DESCRIPTION

[0025] The exemplary embodiments of the present disclosure will be described in more detail below.

[0026] Example 1

[0027] Reference Figure 1 , Figure 1 The schematic description is provided for the purpose of visually introducing the product of the present application, and some schematic features cannot be explained as limitations of the present application except for the structures introduced below and the contents that can be directly and definitely determined therefrom, for example, the fiber filaments in the present application can represent a form of a bundle.

[0028] The geogrid composite material of the present application is schematically shown. The geogrid composite material of the present application is schematically shown. The geogrid composite material of the present application is schematically shown.

[0029] Generally, in the above-mentioned geogrid composite material, the weight of the glass fiber filament 1 is not greater than the weight of the basalt fiber filament 2, and preferably, in the above-mentioned geogrid composite material, the glass fiber filament 1 accounts for 18-45% of the total weight of the glass fiber filament 1 and the basalt fiber filament 2, preferably 30-40%, and the material ratio in production is determined before the first alkali-resistant coating layer 3 is coated.

[0030] The process of obtaining the geogrid composite material in Example 1 will be described below in conjunction with a more specific example.

[0031] Example 2

[0032] The preparation method of the geogrid composite material in Example 1 comprises the steps of:

[0033] S1, preparation of the alkali-resistant coating layer of the glass fiber

[0034] The glass fiber 1 raw material is selected, the glass fiber 1 raw material is dip-coated with an alkali-resistant impregnating agent and cured to obtain the glass fiber 1 coated with a first alkali-resistant coating layer 3 on the surface.

[0035] S2, fiber mixing

[0036] The basalt fiber 2 without any coating treatment and the glass fiber 1 coated with the first alkali-resistant coating layer 3 obtained in step S1 are mixed into mixed fiber.

[0037] S3, preparation of the alkali-resistant coating layer of the mixed fiber

[0038] The mixed fiber obtained in step S2 is dip-coated with an alkali-resistant impregnating agent and cured to obtain the mixed fiber coated with a second alkali-resistant coating layer 4 on the surface.

[0039] The alkali-resistant impregnating agent in steps S1 and S3 in this embodiment is an epoxy resin impregnating agent containing zirconium oxide, the amount of zirconium oxide emulsion added is 6-11% by mass, the amount of epoxy resin binder emulsion added is 24%-45%, and other required coupling agents, additives and solvents are added in the existing guide proportion.

[0040] The following table is the tensile strength attenuation (average value) of the composite material samples obtained according to the process of Example 2 and the composite material samples obtained without the initial dip-coating of step S1 (control example A) after 24h sodium hydroxide corrosion test.

[0041]

[0042] In the above table, the "glass fiber ratio" refers to the proportion of glass fiber in the total weight of glass fiber and basalt fiber.

[0043] Example 3

[0044] The geogrid composite material of Example 1, except that the inorganic alkali-resistant particle concentration in the first alkali-resistant coating layer 3 is higher than that in the second alkali-resistant coating layer 4 in the above geogrid composite material.

[0045] Example 4

[0046] The preparation method of the geogrid composite material in Example 3 comprises the steps of:

[0047] S1, preparation of the alkali-resistant coating layer of the glass fiber

[0048] Glass fiber filament 1 is selected as raw material, and alkali-resistant impregnating agent is applied to the glass fiber filament 1 and then cured to obtain glass fiber filament 1 with a first alkali-resistant coating layer 3 on its surface.

[0049] The alkali-resistant impregnating agent is an epoxy resin impregnating agent containing zirconium oxide. By mass percentage, the amount of zirconium oxide emulsion added is 13-22%, the amount of binder emulsion added is 16%-30%, and other required coupling agents, additives, and solvents are added according to existing guidelines.

[0050] S2, fiber blend

[0051] Basalt fiber filament 2 without any coating treatment and glass fiber filament 1 with a first alkali-resistant coating layer 3 obtained in step S1 are mixed and woven into mixed fiber filament.

[0052] S3, Preparation of Alkali-Resistant Coating Layer for Mixed Fibers

[0053] The mixed fiber filaments obtained in step S2 are impregnated with an alkali-resistant impregnating agent and cured to obtain mixed fiber filaments with a second alkali-resistant coating layer 4 on the surface.

[0054] The alkali-resistant impregnating agent is an epoxy resin impregnating agent containing zirconium oxide. By mass percentage, the amount of zirconium oxide emulsion added is 6-11%, the amount of binder emulsion added is 24%-45%, and other required coupling agents, additives, and solvents are added according to existing guidelines.

[0055] Generally, increasing the amount of inorganic particles will affect the aggregation of fiber bundles to some extent, and will also affect the adhesion of the coating. In the method of the present invention, after the initial impregnation of glass fiber in step S1, the overall impregnation of mixed fiber filaments is carried out. Since the problems that occur during or after the initial impregnation process (e.g., the fiber mixing process) can be repaired in the secondary impregnation, the amount of ZrO2 can be increased to a large extent by means of the initial impregnation. Moreover, compared with Example 2, the tensile strength attenuation value can be further reduced to below 13.5%, which also provides a way to break through the limitation of the overall solid content of inorganic particles in traditional impregnation emulsions.

[0056] In addition, according to the preparation method provided in the above embodiments and the subsequent production needs of geotechnical products, after step S3, a step of impregnating and coating an outer protective layer is also included to produce the finished geotechnical product.

[0057] The above embodiments are merely preferred implementations of the present invention. For those skilled in the art, any modifications or improvements made without departing from the concept of the present invention should fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A method for preparing a geogrid composite material, characterized in that, The geogrid composite material includes mixed fiber filaments and an alkali-resistant coating layer. The mixed fiber filaments are made by mixing a certain proportion of glass fiber filaments (1) with basalt fiber filaments (2). The alkali-resistant coating layer includes a first alkali-resistant coating layer (3) and a second alkali-resistant coating layer (4). The first alkali-resistant coating layer (3) is coated on the outer surface of the glass fiber filaments (1), and the second alkali-resistant coating layer (4) is coated on the outer surface of the mixed fiber filaments. Both the first alkali-resistant coating layer (3) and the second alkali-resistant coating layer (4) contain zirconium oxide particles. The glass fiber filaments (1) account for 18-45% of the total weight of the glass fiber filaments (1) and the basalt fiber filaments (2). The concentration of zirconium oxide particles in the first alkali-resistant coating layer (3) is higher than that in the second alkali-resistant coating layer (4). The preparation method includes the following steps: S1, Preparation of alkali-resistant coating layer for glass fiber filaments Select glass fiber filament (1) as raw material, dip the glass fiber filament (1) raw material into an alkali-resistant impregnating agent and cure it to obtain glass fiber filament (1) with a first alkali-resistant coating layer (3) on the surface. S2, fiber blend Basalt fiber filaments (2) and glass fiber filaments (1) with a first alkali-resistant coating layer (3) obtained in step S1 are mixed and woven into mixed fiber filaments; S3, Preparation of Alkali-Resistant Coating Layer for Mixed Fibers The mixed fiber filaments obtained in step S2 are impregnated with an alkali-resistant impregnating agent and cured to obtain mixed fiber filaments with a second alkali-resistant coating layer (4) on the surface; The alkali-resistant impregnating agent in steps S1 and S3 is an epoxy resin impregnating agent containing zirconium oxide. By mass percentage, the amount of zirconium oxide emulsion added in the alkali-resistant impregnating agent in step S1 is 13-22%, and the amount of zirconium oxide emulsion added in the alkali-resistant impregnating agent in step S3 is 6-11%.

2. The method for preparing a geogrid composite material according to claim 1, characterized in that, The glass fiber filament (1) accounts for 30-40% of the total weight of the glass fiber filament (1) and the basalt fiber filament (2).

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