Spray-seeding type vegetation scour-preventing soil fixation material and preparation method thereof

Abstract

The invention relates to the technical field of scour prevention and soil fixation, in particular to a spray-seeding type vegetation scour prevention and soil fixation material and a preparation method thereof.The spray-seeding type vegetation scour prevention and soil fixation material is prepared from, by weight, 10-30 parts of a nano-silica solution with the concentration being 10-35 wt%, 5-10 parts of hydroxypropyl methyl cellulose, 10-20 parts of polyvinyl alcohol, 5-10 parts of polyacrylamide, 5-10 parts of polytetrafluoroethylene, 10-20 parts of a modifier, 3-5 parts of a polymerizing agent and 3-5 parts of a coupling agent; the anti-scour soil fixation material is high in water flow scour resistance and erosion resistance, has good cohesiveness, can effectively solve the problem that sandy soil collapses when encountering water, and is good in reinforcement effect. When the scour-preventing soil fixing material is used for reinforcing the sand slope, the erosion resistance of the slope surface of the spray-seeding type vegetation sand slope is enhanced, and the stability of the spray-seeding type vegetation sand slope under the action of water flow scour is improved.

Description

Technical Field

[0001] This invention relates to the field of soil erosion control and stabilization technology, and more specifically, to a hydroseeding type vegetation soil erosion control and stabilization material and its preparation method. Background Technology

[0002] Soil ecological and environmental problems include soil erosion, pollution, desertification, and loss of biodiversity, with soil erosion being the most significant. If the sandy slopes in these ecologically fragile areas are not managed, especially the sandy soil material on the slope surface is not protected, the resulting soil erosion will cause enormous damage to the ecological environment and loss of land resources.

[0003] Traditional techniques for soil reinforcement of hydroseeded slopes mainly include engineering protection technologies such as frame beams, spraying, three-dimensional mesh, and retaining walls. These techniques form a support framework on the slope, slowing down the flow of water across the slope. The aim of these techniques is to prevent overall slope instability under the erosion of water flow, and they are widely used in engineering. However, in practice, for slopes with poor self-healing capabilities, many instances have occurred where exposed slope protection materials lead to localized collapse or damage of the protection measures under the erosion of water flow. Traditional protection techniques often only consider the overall stability of the slope while neglecting the slope's resistance to water erosion. Furthermore, the rigid bond between traditional engineering materials and sandy soil slopes can cause structural detachment under long-term exposure, thus requiring improvement. Summary of the Invention

[0004] The purpose of this invention is to provide a hydroseeding-type vegetation erosion control and soil stabilization material and its preparation method, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A hydroseeding-type vegetation erosion control and soil stabilization material comprises: 10-30 parts by weight of a nano-silica solution with a concentration of 10wt%-35wt%, 5-10 parts of hydroxypropyl methylcellulose, 10-20 parts of polyvinyl alcohol, 5-10 parts of polyacrylamide, 5-10 parts of polytetrafluoroethylene, 10-20 parts of a modifier, 3-5 parts of a polymerizing agent, and 3-5 parts of a coupling agent.

[0006] Preferably, the concentration of the nano-silica solution is 15wt% to 25wt%.

[0007] Preferably, by weight, the composition comprises 15-25 parts of nano-silica solution, 7-9 parts of hydroxypropyl methylcellulose, 13-17 parts of polyvinyl alcohol, 6-9 parts of polyacrylamide, 6-9 parts of polytetrafluoroethylene, 12-18 parts of modifier, 3.5-4.5 parts of polymerizer, and 3.5-4.5 parts of coupling agent.

[0008] Preferably, the average particle size of the nano-silica in the nano-silica solution is 70nm to 90nm; the hydroxypropyl methylcellulose has a hydroxypropoxy content of 8wt% to 12wt% and a methoxy content of 20wt% to 30wt%; the polyvinyl alcohol has a viscosity of 15mPa·s to 17mPa·s and an average degree of polymerization of 1450 to 1650.

[0009] Preferably, the polymerizing agent is prepared by mixing a polymer emulsion and a resin in a 1:1 ratio.

[0010] Preferably, the coupling agent is prepared by mixing organosilicon and organoaluminum compounds in a 1:1 ratio.

[0011] Preferably, the modifier is prepared by mixing silicate, aluminate and titanate in a 1:1:1 ratio.

[0012] Preferably, the method includes mixing a nano-silica solution, hydroxypropyl methylcellulose, polyvinyl alcohol, polyacrylamide, polytetrafluoroethylene, a modifier, a polymerizer, and a coupling agent to obtain an erosion-resistant and soil-stabilizing material solution.

[0013] Preferably, select an appropriate proportion of erosion control and soil stabilization material solution and the soil at the site of the hydroseeding vegetation, mix the two and let them stand, and then spray the mixed soil onto the location where the vegetation needs to be hydroseeded.

[0014] Preferably, the thickness of the mixed soil spray is 8-10 cm.

[0015] Compared with the prior art, the beneficial effects of the present invention are: This hydroseeding-type vegetation erosion control material exhibits strong resistance to water erosion and has excellent adhesion, effectively improving the problem of sandy soil collapsing upon contact with water, resulting in good reinforcement. Using this invention to reinforce sandy slopes enhances the erosion resistance of hydroseeded vegetation sandy slopes and improves their stability under water erosion. Furthermore, the preparation methods for this soil-stabilizing material are very simple, requiring no additional additives or auxiliary equipment.

[0016] The addition of polytetrafluoroethylene to this hydroseeding vegetation erosion control and soil stabilization material enhances its high-temperature and low-temperature resistance, ensuring that the soil stabilization layer remains intact in both summer and winter. Detailed Implementation

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] This invention provides a technical solution: A hydroseeding-type vegetation erosion control and soil stabilization material comprises: 10-30 parts by weight of a nano-silica solution with a concentration of 10wt%-35wt%, 5-10 parts of hydroxypropyl methylcellulose, 10-20 parts of polyvinyl alcohol, 5-10 parts of polyacrylamide, 5-10 parts of polytetrafluoroethylene, 10-20 parts of a modifier, 3-5 parts of a polymerizing agent, and 3-5 parts of a coupling agent.

[0019] This invention uses nano-silica, hydroxypropyl methylcellulose, polyvinyl alcohol, polyacrylamide, polytetrafluoroethylene, modifier, polymerizer and coupling agent to prepare erosion-resistant and soil-stabilizing materials with good adhesion, strong bonding ability, and excellent resistance to erosion and corrosion. It can be firmly bonded to sandy soil, has good stability, and can withstand high and low temperature weather. It is not easy for solid materials in the soil to crack in summer and winter.

[0020] This invention selects nano-silica as the main particulate material. It is non-toxic and harmless, with uniform particle size. Due to the large number of hydroxyl groups on its surface, it has high surface activity and is easy to aggregate, which is very conducive to the formation of a gel. The resulting gel has a large specific surface area, high adsorption, and good permeability. The molecular formula of nano-silica is SiO2-nH2O, and the particle nucleus is a polymer of silica. However, because the silica nanoparticles themselves are extremely small, containing very few atoms and having very low mass, the aggregated gel is insufficient for slope soil reinforcement. Therefore, this invention adds hydroxypropyl methylcellulose and polyvinyl alcohol, which react with nano-silica to generate an expandable three-dimensional network structure, thereby reinforcing sand particles. The hydroxypropyl methylcellulose and polyvinyl alcohol selected in this invention have long-chain structures, which are conducive to the formation of a three-dimensional network structure. Hydroxypropyl methylcellulose contains a large number of hydroxyl groups and hydrogen bonds. The hydroxyl groups are evenly distributed along the cellulose molecular chain. The oxygen atoms on the hydroxyl groups combine with silicon atoms to form [-Si-O-Si-]n structures. The chemical energy generated during the formation process breaks the hydrogen bonds in hydroxypropyl methylcellulose and polyvinyl alcohol. The broken hydrogen bonds and the free hydrogen bonds in the nano-silicon material form new covalent hydrogen bonds. The stronger the hydrogen bond breaking effect, the faster the ability to form new covalent hydrogen bonds. Thus, the [-Si-O-Si-]n structures and covalent hydrogen bonds overlap to form new long-chain structures. These components form a three-dimensional network structure, which improves the internal cementing ability of the material and its bonding ability with sand and soil, thereby exhibiting excellent erosion resistance and anti-corrosion ability. In addition, since the process of breaking hydrogen bonds also hinders the formation of some [-Si-O-Si-]n structures, a modifier with the molecular formula K2O·nSiO2 is added to replenish the lost silicon and oxygen ions and compensate for the [-Si-O-Si-]n structures.

[0021] This invention modifies nano-silica materials by adding hydroxypropyl methylcellulose, polyvinyl alcohol, and modifiers, forming a three-dimensional network layer with adhesive properties in the microstructure and appearing as a gel. This gel has good adhesive properties and plays a role in consolidation and filling, which can bind and encapsulate particles in sand.

[0022] Furthermore, when adding nano-silica materials, this invention adds them in the form of a solution to give them a certain adhesive ability. At the same time, this invention keeps the concentration of the nano-silica solution in the range of 10wt% to 35wt% to obtain a quality with both good adhesive ability and fluidity, thereby avoiding the problems of poor adhesive performance due to too low concentration and poor fluidity due to too high concentration.

[0023] Specifically, the concentration of the nano-silica solution is 15wt% to 25wt%.

[0024] Specifically, by weight, the composition includes 15-25 parts of nano-silica solution, 7-9 parts of hydroxypropyl methylcellulose, 13-17 parts of polyvinyl alcohol, 6-9 parts of polyacrylamide, 6-9 parts of polytetrafluoroethylene, 12-18 parts of modifier, 3.5-4.5 parts of polymerizer, and 3.5-4.5 parts of coupling agent.

[0025] Furthermore, the average particle size of the nano-silica in the nano-silica solution is 70nm to 90nm; Furthermore, the hydroxypropyl methylcellulose has a hydroxypropoxy content of 8 wt% to 12 wt% and a methoxy content of 20 wt% to 30 wt%. Furthermore, the viscosity of polyvinyl alcohol is 15 mPa·s to 17 mPa·s, and the average degree of polymerization is 1450 to 1650.

[0026] In this invention, the polymerizing agent is prepared by mixing polymer emulsion and resin in a 1:1 ratio.

[0027] In this invention, the coupling agent is prepared by mixing organosilicon and organoaluminum compounds in a 1:1 ratio.

[0028] In this invention, the modifier is made by mixing silicate, aluminate and titanate in a 1:1:1 ratio. Because silicate, aluminate and titanate are added to the raw materials, these substances can react with the active components in the soil to generate a hard and stable crystal structure, thereby improving the strength and durability of the soil.

[0029] Adding polytetrafluoroethylene (PTFE) to soil stabilization materials can enhance their resistance to high and low temperatures, ensuring that the soil stabilization layer is not damaged in both summer and winter.

[0030] The polyacrylamide used in this invention is a low-polymerization-degree, non-ionic, water-soluble, and highly cementing polymer. It has a good flocculation effect on water-sensitive formations that will immediately disperse under water immersion and erosion, and can enhance the cementing performance between particles. Its addition can improve the water erosion and dissolution resistance of the modified nano-silicon curing liquid.

[0031] A method for preparing a hydroseeding-type vegetation erosion control and soil stabilization material includes: mixing nano-silica solution, hydroxypropyl methylcellulose, polyvinyl alcohol, polyacrylamide, polytetrafluoroethylene, modifier, polymerizer and coupling agent to obtain an erosion control and soil stabilization material solution.

[0032] Select an appropriate ratio of erosion control and soil stabilization material solution and the soil from the area to be sprayed with vegetation, mix the two together and let them stand. Then spray the mixed soil onto the location where the vegetation needs to be sprayed; the thickness of the mixed soil spray should be 8-10 cm.

Claims

1. A hydroseeding-type vegetation erosion control and soil stabilization material, characterized in that: include: By weight, the following components are present: 10-30 parts of nano-silica solution with a concentration of 10wt%-35wt%, 5-10 parts of hydroxypropyl methylcellulose, 10-20 parts of polyvinyl alcohol, 5-10 parts of polyacrylamide, 5-10 parts of polytetrafluoroethylene, 10-20 parts of modifier, 3-5 parts of polymerizer, and 3-5 parts of coupling agent.

2. The hydroseeding vegetation erosion control and soil stabilization material according to claim 1, characterized in that: The concentration of the nano-silica solution is 15wt% to 25wt%.

3. The hydroseeding vegetation erosion control and soil stabilization material according to claim 2, characterized in that: By weight, the composition includes 15-25 parts of nano-silica solution, 7-9 parts of hydroxypropyl methylcellulose, 13-17 parts of polyvinyl alcohol, 6-9 parts of polyacrylamide, 6-9 parts of polytetrafluoroethylene, 12-18 parts of modifier, 3.5-4.5 parts of polymerizer, and 3.5-4.5 parts of coupling agent.

4. The hydroseeding vegetation erosion control and soil stabilization material according to claim 3, characterized in that: The average particle size of the nano-silica in the nano-silica solution is 70nm to 90nm; the hydroxypropyl methylcellulose has a hydroxypropoxyl content of 8wt% to 12wt% and a methoxyl content of 20wt% to 30wt%; the viscosity of polyvinyl alcohol is 15mPa·s to 17mPa·s and the average degree of polymerization is 1450 to 1650.

5. The hydroseeding vegetation erosion control and soil stabilization material according to claim 1, characterized in that: The polymerizing agent is made by mixing polymer emulsion and resin in a 1:1 ratio.

6. The hydroseeding vegetation erosion control and soil stabilization material according to claim 1, characterized in that: The coupling agent is made by mixing organosilicon and organoaluminum compounds in a 1:1 ratio.

7. The hydroseeding vegetation erosion control and soil stabilization material according to claim 1, characterized in that: The modifier is made by mixing silicate, aluminate and titanate in a 1:1:1 ratio.

8. A method for preparing a hydroseeding-type vegetation erosion control and soil stabilization material according to any one of claims 1-7, comprising: A solution of nano-silica, hydroxypropyl methylcellulose, polyvinyl alcohol, polyacrylamide, polytetrafluoroethylene, modifier, polymerizer and coupling agent are mixed to obtain an anti-erosion and soil stabilization material solution.

9. The preparation method of a hydroseeding type vegetation erosion control and soil stabilization material according to claim 8, characterized in that: Select an appropriate ratio of erosion control and soil stabilization material solution and the soil from the area to be sprayed with vegetation, mix the two together and let them stand, then spray the mixed soil onto the location where vegetation needs to be sprayed.

10. The method for preparing a hydroseeding-type vegetation erosion control and soil stabilization material according to claim 9, characterized in that: The mixed soil should be sprayed to a thickness of 8-10 cm.