Fiber-reinforced controllable cracking structure covering for ecological construction in drought region

A fiber toughening and covering technology is applied in the field of fiber toughening and controllable crack structure covering, which can solve the problems of smooth sand surface, difficulty in reducing wind speed, difficulty in self-recovery of sandy land, and difficulty in implementing ecological reconstruction by large-scale mechanization.

Inactive Publication Date: 2013-12-04
QUANZHOU NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing problems: the land is severely salinized, the sand surface is smooth and it is difficult to reduce the wind speed, and the water and air in the sand body are difficult to exchange
Existing problems: not resistant to wind erosion, high biological toxicity of urea-formaldehyde, smooth sand surface makes it difficult to reduce wind speed, difficult to exchange water vapor in sand body
Existing problems: high investment cost, difficult self-recovery of sandy land, poor wind erosion resistance
[0011] To sum up, the above three sand control ideas are difficult to carry out large-scale mechanized implementation and subsequent ecological reconstruction, which is why it is still impossible to control desertified land on a large scale

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1 part of straw, 99 parts of papermaking sludge with a water content of 95% (equivalent to about 5 parts of dry papermaking sludge). When the papermaking sludge is discharged from the factory, it contains about 5% of polyacrylamide and microbial sticky polysaccharide. These polyacrylamide The viscous polysaccharide is the binder. Therefore, in this case, it is generally not necessary to add a binder to mix it and then lay it with a scraper. The thickness of the laying is 5cm; the thickness of the substrate layer is 10cm, which is a 1:3 mixture of domestic sludge and sand. After drying, spray a little aqueous solution of 5% polyvinyl alcohol 2499 to make it slightly moist.

[0038] Experimental results: The material can reduce the water evaporation rate by 78%. Plants can germinate and survive under an annual rainfall of 80mm when simulated rain and heat in the same season, but the success of greening can usually be guaranteed under a rainfall of 150mm. Crackle material...

Embodiment 2

[0042] 2 parts of glass fiber, 90 parts of red clay (belonging to bentonite) with a water content of 40%, 0.2 parts of polyacrylamide as the binder, 0.2 parts of polyvinyl alcohol, and appropriate amount of water to convert it into a flocculated mud mass, mix, Lay it directly on the sand surface with a thickness of 5cm. After it is almost dry, spray it with sodium methyl silicate (a substance belonging to water glass) to moisten it a little. The drying time is about 10 days. The amount of binder in this process is less, but because the cement itself has its own bonding ability, the amount of binder can be appropriately reduced

[0043] Experimental results: The experiment was carried out with the same method as in Example 1, and the simulated annual rainfall was 80MM. Results: A relatively dense crack structure is formed. The material is very hard and wear-resistant, and cannot be biodegraded. It can reduce water evaporation by about 83%, and can accommodate rainfall into the...

Embodiment 3

[0046] On the basis of Example 1, the conditions are exactly the same, but after laying the surface layer and spraying polyvinyl alcohol, continue to spread a small amount of vermiculite flakes or mica flake minerals, so that the surface layer is covered with a thin layer that is more hydrophobic Generally, the amount of hydrophobic covering on a square meter of fiber toughened controllable cracking structural material is between 0.1-2 kg.

[0047] The experimental results show that the fiber-toughened and controllable crack structure covering can reduce the water evaporation rate by 85-93%, the cracks become smaller, and it does not affect the plant germination and the wind erosion resistance of the surface layer, and does not significantly affect the water retention capacity. The performance is even better. Compared with Embodiment 1, it is more suitable for extremely harsh environments.

[0048] According to the phenomenon that plants grow preferentially in natural land cr...

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Abstract

The invention provides a fiber-reinforced controllable cracking structure covering for ecological construction in a drought region. The fiber-reinforced controllable cracking structure covering is formed by mixing the following substances of fibers, a bonding agent and ecological filler, wherein the ratio of the weight parts of the bonding agent to the weight parts of the ecological filler from which water is removed is (1-10):100; the ratio of the total weight parts of the bonding agent and the ecological filler from which water is removed to the weight parts of the fibers is (5-20):1; the water content of the ecological filler is 35-99 percent; the thickness of the fiber-reinforced controllable cracking structure covering is 2-20cm; the thickness of the fiber-reinforced controllable cracking structure covering after being naturally dried is 0.5-10cm. The fiber-reinforced controllable cracking structure covering provided by the invention has the advantages that the evaporation speed of water in soil is reduced, gases are freely exchanged, the growth of microorganism is facilitated, the roughness of a sand surface is increased, the corrosion resistance and biodegradation are realized, the large-scale mechanical operation can be realized, and the like.

Description

【Technical field】 [0001] The invention relates to a fiber-reinforced and controllable crack structure covering for ecological construction in arid areas. 【Background technique】 [0002] Water evaporation in arid areas is a key factor restricting the ecological construction of this area. At present, due to technical limitations, it is still difficult to achieve large-scale mechanized and effective governance of sandy land. The main existing governance methods are: [0003] 1. Mechanical sand fixation. Mechanical sand fixation is to erect or lay wooden strips, soil blocks, stones, straw and their products and other materials to form windshields or grass grids to hinder the flow of sandstorms. This process cannot effectively improve the sand flow. Physicochemical properties. Straw felt is a typical mechanical sand-fixing material. In terms of material structure, porosity can ensure high air permeability but is not easy to intercept water; content, reducing the soil bulk den...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/00
Inventor 陈楷翰李文行李小文
Owner QUANZHOU NORMAL UNIV
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