Soil stabilizer for ecological reconstruction of soil surface in airport flying area and preparation method of soil stabilizer

Abstract

The invention relates to a soil stabilizer for airport flying area soil surface ecological reconstruction and a preparation method thereof. The soil stabilizer is prepared from the following raw materials in parts by weight: 22-24 parts of river sand, 8-10 parts of quick lime, 8-9 parts of cement, 6.5-7 parts of alum, 4-5 parts of glutinous rice flour, 15-16 parts of realgar powder and 124-144 parts of water. The soil stabilizer has the advantages that after the soil stabilizer is used for curing the airport flying area soil surface, the airport flying area soil surface can achieve certain compactness, durability, insect repelling performance and safety under the condition that sufficient permeability is guaranteed, the maintenance cost and the maintenance frequency of the airport flying area soil surface are greatly reduced, the maintenance expenditure is saved, and the maintenance cost is reduced. And after the airport flying area is solidified, a good insect-repelling and durable effect is achieved, so that the economic benefit of airport operation can be improved, the overall safety of airport operation can be improved, and a feasible solution is provided for construction of a green airport.

Description

Technical Field

[0001] The present invention belongs to the field of civil aviation technology, and in particular relates to a soil solidifying agent for ecological transformation of the soil surface of an airport flight area and a preparation method thereof. Background Art

[0002] Currently, soil stabilization technologies are generally categorized into mechanical stabilization, thermal stabilization, reinforcement stabilization, grouting stabilization, and chemical stabilization. Chemical stabilization is the most commonly used method for soil reinforcement, involving the addition of inorganic binders such as cement and lime to the soil. It is the most cost-effective and effective stabilization method, and is therefore widely used.

[0003] Inorganic binders, primarily cement and lime, offer excellent strength, water stability, and frost resistance, and have been widely used in many projects. However, analysis has shown that cement-based soils experience significant shrinkage and a high risk of cracking; lime-based soils exhibit low early strength and slow growth; and cement and lime have poor, or sometimes even no, curing effect on clay, organic, and saline soils with high plasticity. Furthermore, existing research indicates that the production of cement and lime consumes significant natural resources, damaging mountain ecosystems. The gases emitted during production pollute the environment and pose a threat to human health. Therefore, green and efficient curing technologies are urgently needed.

[0004] Currently, most airports still use methods such as repeatedly rolling the airport airfield surface, manual mowing, and manual bird repelling to maintain and ensure the safety of the airport airfield. However, this requires a lot of time, manpower and resource costs every year, and therefore requires huge investment. Summary of the Invention

[0005] In order to solve the above problems, the purpose of the present invention is to provide a soil solidifier for ecological transformation of the soil surface of an airport flight area and a preparation method thereof.

[0006] In order to achieve the above object, the soil solidifying agent for ecological transformation of the soil surface of an airport flight area provided by the present invention is composed of the following raw materials in parts by weight:

[0007]

[0008]

[0009] The particle size of the river sand is 0.25-0.35 mm.

[0010] The method for preparing a soil solidifying agent for ecological transformation of the soil surface of an airport flight area provided by the present invention comprises the following steps performed in sequence:

[0011] 1) Mix glutinous rice flour and water in a mass ratio of 1:8 and stir evenly, then heat to 85° C. and continue stirring until a uniform glutinous rice paste is formed;

[0012] 2) Mix cement and water in a mass ratio of 5:2 and stir until a uniform mixed cement slurry is formed;

[0013] 3) Mix alum and 40°C warm water in a mass ratio of 1:10 and stir until the alum is completely dissolved to form an alum aqueous solution;

[0014] 4) Mix quicklime and water in a mass ratio of 1:3 and stir until a slurry of quicklime is obtained, and let stand for 4 hours;

[0015] 5) Pour the above-mentioned glutinous rice slurry, mixed cement slurry, alum aqueous solution, and slaked lime slurry into a container in sequence, fully stir each material after adding, then add river sand and realgar powder according to the above-mentioned mass ratio, and mix evenly to prepare the soil solidifier for ecological transformation of the soil surface of the airport flight area.

[0016] In this invention, glutinous rice flour is used as the primary skeleton to provide good flexibility and bonding ability, minimizing the viscosity of the system while ensuring dissolution efficiency. A heating temperature of 85°C makes the system viscous but not gelled, facilitating subsequent mixing. Cement is used as the primary inorganic skeleton to impart basic structural stability to the curing agent system, and controlled proportions allow for good pumpability of the slurry. Alum is used as a reactivity enhancer to form a diaspore-like structure in an alkaline environment, improving overall curing density. Controlling the temperature at 40°C utilizes high temperatures to accelerate the precipitation of hydrolysis products. Quicklime is used as an alkaline modifier to increase the subsequent reaction rate and stability. The purpose of allowing the solution to stand for 4 hours is to fully mature the Ca(OH) and prevent the exothermic heat of the quicklime from causing local instability in the system. River sand, primarily composed of silicon dioxide (SiO2), typically exists in the form of quartz particles. Adding river sand to soil can improve the soil's gradation structure, forming a coarse and fine soil system and enhancing compressive and shear strengths. River sand has coarse particles, significantly reducing soil expansion and contraction while increasing its water permeability, meeting current permeability requirements for airport soil zones. Realgar powder primarily acts as an insect repellent. Its main ingredient disrupts the nervous systems of insects and pests, causing them to die or move away from airport soil zones. By reducing the insect population in the ecosystem near airports, and consequently the bird population, bird strikes at airports can be reduced through ecological conservation, thereby improving airport safety.

[0017] The soil solidifying agent and preparation method provided by the present invention for ecological transformation of the soil surface in an airport flight area have the following beneficial effects:

[0018] After the airport flight area soil surface is solidified with this soil solidifier, the airport flight area soil surface can achieve a certain density, durability, insect repellency and safety while ensuring sufficient permeability, which greatly reduces the maintenance cost and maintenance frequency of the airport flight area soil surface, saves maintenance expenses, and enables the airport flight area to achieve good insect repellent and durability effects after solidification. Therefore, it can improve the economic benefits of airport operations while improving the overall safety of airport operations, and provide a feasible solution for the construction of green airports. DETAILED DESCRIPTION

[0019] The present invention is described in detail below with reference to specific embodiments.

[0020] Example 1:

[0021] The soil solidifying agent for ecological transformation of the soil surface of an airport flight area provided in this embodiment is composed of the following raw materials in kg:

[0022]

[0023] The preparation method comprises the following steps performed in sequence:

[0024] 1) Mix glutinous rice flour and water in a mass ratio of 1:8 and stir evenly, then heat to 85° C. and continue stirring until a uniform glutinous rice paste is formed;

[0025] 2) Mix cement and water in a mass ratio of 5:2 and stir until a uniform mixed cement slurry is formed;

[0026] 3) Mix alum and 40°C warm water in a mass ratio of 1:10 and stir until the alum is completely dissolved to form an alum aqueous solution;

[0027] 4) Mix quicklime and water in a mass ratio of 1:3 and stir until a slurry of quicklime is obtained, and let stand for 4 hours;

[0028] 5) Pour the above-mentioned glutinous rice slurry, mixed cement slurry, alum aqueous solution, and slaked lime slurry into a container in sequence, fully stir each material after adding, then add river sand and realgar powder with a particle size of 0.30 mm according to the above-mentioned addition amount, and mix evenly to prepare the soil solidifier for ecological transformation of the soil surface of the airport flight area.

[0029] Example 2:

[0030] The soil solidifying agent for ecological transformation of the soil surface of an airport flight area provided in this embodiment is composed of the following raw materials in kg:

[0031]

[0032] The method for preparing a soil solidifying agent for ecological transformation of the soil surface of an airport flight area provided by the present invention comprises the following steps performed in sequence:

[0033] 1) Mix glutinous rice flour and water in a mass ratio of 1:8 and stir evenly, then heat to 85° C. and continue stirring until a uniform glutinous rice paste is formed;

[0034] 2) Mix cement and water in a mass ratio of 5:2 and stir until a uniform mixed cement slurry is formed;

[0035] 3) Mix alum and 40°C warm water in a mass ratio of 1:10 and stir until the alum is completely dissolved to form an alum aqueous solution;

[0036] 4) Mix quicklime and water in a mass ratio of 1:3 and stir until a slurry of quicklime is obtained, and let stand for 4 hours;

[0037] 5) Pour the above-mentioned glutinous rice slurry, mixed cement slurry, alum aqueous solution, and slaked lime slurry into a container in sequence, fully stir each material after adding, then add river sand and realgar powder with a particle size of 0.25 mm according to the above-mentioned addition amount, and mix evenly to prepare the soil solidifier for ecological transformation of the soil surface of the airport flight area.

[0038] Example 3:

[0039] The soil solidifying agent for ecological transformation of the soil surface of an airport flight area provided in this embodiment is composed of the following raw materials in kg:

[0040]

[0041] The method for preparing a soil solidifying agent for ecological transformation of the soil surface of an airport flight area provided by the present invention comprises the following steps performed in sequence:

[0042] 1) Mix glutinous rice flour and water in a mass ratio of 1:8 and stir evenly, then heat to 85° C. and continue stirring until a uniform glutinous rice paste is formed;

[0043] 2) Mix cement and water in a mass ratio of 5:2 and stir until a uniform mixed cement slurry is formed;

[0044] 3) Mix alum and 40°C warm water in a mass ratio of 1:10 and stir until the alum is completely dissolved to form an alum aqueous solution;

[0045] 4) Mix quicklime and water in a mass ratio of 1:3 and stir until a slurry of quicklime is obtained, and let stand for 4 hours;

[0046] 5) Pour the above-mentioned glutinous rice slurry, mixed cement slurry, alum aqueous solution, and slaked lime slurry into a container in sequence, fully stir each material after adding, then add river sand with a particle size of 0.35 mm and realgar powder according to the above-mentioned addition amount, and mix evenly to prepare the soil solidifier for ecological transformation of the soil surface of the airport flight area.

[0047] The inventors conducted a series of indoor geotechnical tests on test soil samples from the airfield zone to assess their basic performance indicators, laying the groundwork for subsequent research. The average moisture content of the test soil samples was determined to be 13.38%, the natural density was 1.99 g / cm3, the optimal moisture content was 17.07%, and the maximum dry density was 1.61 g / cm3. To investigate the applicability of commonly used curing schemes, the test soil samples were cured with three types of highway curing agents, A, B, and C. Compaction tests, penetration tests, and freeze-thaw cycle tests were then conducted to compare and analyze the comprehensive improvement effects of different curing schemes. The test results show that the addition of 8% cement and 6% curing agent A to the soil samples achieved the best overall curing effect, reducing the optimal moisture content to 15.55% and achieving a maximum dry density of 1.651 g / cm. The addition of 8% cement and 3% curing agent C to the soil samples resulted in a permeability coefficient of 8.093E-07 cm / s, approximately 18.4% lower than that of the untreated soil samples, maintaining optimal permeability. Comparing durability, after five freeze-thaw cycles, curing agents A, B, and C all significantly improved the soil's freeze-thaw resistance, achieving an average expansion coefficient of 1.056 and no cracking. At the same dosage, curing agents A and B exhibited superior expansion suppression, with curing agents A exhibiting the best durability, achieving an expansion coefficient of 1.0535, particularly when added to the soil samples at 8% cement and 6%.

[0048] The new curing agent developed by the present invention was also subjected to corresponding geotechnical tests. In the compaction test, the maximum dry density and optimal moisture content of the soil were improved after curing treatment, and the minimum density could reach 96.4%, meeting the density safety requirements of the airfield soil zone. The maximum dry density of the test soil sample after curing was between 1.632-1.651g / cm3, and the optimal moisture content was between 15.32-15.79%. On average, its maximum dry density was increased by 2.34% and its optimal moisture content was reduced by 5.73%. Although it was slightly lower than the 3.01% dry density increase of curing agent A (1.651g / cm3), it still met the 96.4% density requirement and freeze-thaw durability standard of the airfield. In permeability tests, the new curing agent showed a permeability coefficient ranging from 8.837E-07 cm / s to 1.114E-06 cm / s. This represents an improvement over the test soil sample's permeability coefficient of 9.985E-07 cm / s, but significantly better than the best-performing highway curing agent, C (8.093E-07 cm / s). The resulting open pore structure facilitates drainage and prevents water accumulation in the airport surface area. In freeze-thaw cycle tests, the expansion coefficients of the cured test soil samples after five freeze-thaw cycles ranged from 1.0508 to 1.0629, with an average expansion coefficient of 1.059. This demonstrates superior durability compared to the uncured test soil samples, which cracked. While the average expansion coefficient after freeze-thaw cycles was slightly higher than that of curing agent A (1.0535), its overall performance still meets the airport's freeze-thaw resistance requirements (expansion coefficient <1.06). In terms of insect repellency, the new curing agent achieved an 86.67% insect escape rate at a 15% insect repellent addition, while conventional curing agents A, B, and C failed to demonstrate this functional characteristic. By reducing the number of insects in the airport soil, the number of birds near the airport can be controlled, thereby reducing the chance of bird strikes.

[0049] Taking into account the special requirements of airport soil areas for permeability and biosafety, the new curing agent not only maintains sufficient structural strength but also has the advantages of drainage optimization and ecological protection, and has better engineering applicability than traditional highway curing agents.

Claims

1. A soil solidifying agent for ecological transformation of the soil surface in an airport flight area, characterized by: The soil solidifying agent is composed of the following raw materials in parts by weight: River sand 22-24 Quicklime 8-10 Cement 8-9 Alum 6.5-7 4-5 glutinous rice flour, 15-16 realgar powder, 124-144 water.

2. The soil solidifying agent for ecological transformation of the soil surface of an airport flight area according to claim 1 is characterized by: The particle size of the river sand is 0.25-0.35 mm.

3. A method for preparing a soil solidifying agent for ecological transformation of the soil surface of an airport flight area according to claim 1 or 2, characterized in that: The preparation method comprises the following steps performed in sequence: 1) Mix glutinous rice flour and water in a mass ratio of 1:8 and stir evenly, then heat to 85° C. and continue stirring until a uniform glutinous rice paste is formed; 2) Mix cement and water in a mass ratio of 5:2 and stir until a uniform mixed cement slurry is formed; 3) Mix alum and 40°C warm water in a mass ratio of 1:10 and stir until the alum is completely dissolved to form an alum aqueous solution; 4) Mix quicklime and water in a mass ratio of 1:3 and stir until a slurry of quicklime is obtained, and let stand for 4 hours; 5) Pour the above-mentioned glutinous rice slurry, mixed cement slurry, alum aqueous solution, and slaked lime slurry into a container in sequence, fully stir each material after adding, then add river sand and realgar powder according to the above-mentioned mass ratio, and mix evenly to prepare the soil solidifier for ecological transformation of the soil surface of the airport flight area.

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