Environment-friendly soil stabilizer as well as preparation method and application thereof

Abstract

The invention discloses an environment-friendly soil stabilizer and a preparation method and application thereof, and belongs to the technical field of soil stabilizers, the soil stabilizer comprises the following raw materials by weight: 30-50% of plant ash; 25%-35% of diatomite; 6%-27% of coal-fired slag; 2%-4% of white carbon black; and 2%-5% of an adhesive aid. The plant ash, the diatomite and the coal-fired furnace slag are used as preparation raw materials, so that a large amount of dust and pollutants are not generated in the production and use processes, and the environmental pollution degree is also reduced while the consumption of natural resources is reduced. The technical problems that an existing soil stabilizer can generate a large amount of dust and pollutants in the production and use process, the ecological environment is seriously affected, and the resource consumption is large are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of soil solidifiers, and in particular relates to an environmentally friendly soil solidifier and a preparation method and application thereof. Background Art

[0002] With the acceleration of urbanization and the continuous advancement of infrastructure construction, the demand for soil solidification materials is increasing. However, traditional soil solidification materials have the following defects: large environmental impact: traditional soil solidification materials such as lime, cement, etc. will produce a lot of dust and pollutants during production and use, which will have a serious impact on the ecological environment. At the same time, the mining and processing of these materials will also consume a lot of natural resources and energy; limited solidification effect: the existing solidifiers have poor adaptability to soil properties, and complex soil testing and evaluation are required before construction; high cost: although some high-performance soil solidifiers have good solidification effects, their manufacturing costs are high, resulting in relatively high use costs, which limits the promotion and use of these solidifiers in a wide range of applications.

[0003] Chinese patent CN117801826A discloses an environmentally friendly curing agent and a method for repairing contaminated soil. The ingredients in the environmentally friendly curing agent include alkaline inorganic composite materials such as plant ash, boron magnesium mud, phosphogypsum and coal gangue, organic composite materials such as waste edible oil and cassava starch residue and plant fiber, which achieves efficient fixation of heavy metals and organic pollutants, reduces soil leaching toxicity, improves soil strength and engineering performance, and avoids high alkalinity and high carbon emissions, and has environmental friendliness and economic benefits. However, the coal gangue in the curing agent will generate a large amount of dust during mining, crushing, transportation, etc., which poses a threat to air quality and human health, and the coal gangue needs to consume energy during processing and utilization. The coal gangue may also contain heavy metals and other harmful substances. If it is not properly handled during processing and utilization, it may cause pollution to the environment.

[0004] In summary, it can be seen that the existing soil stabilizers have the problems of large resource consumption, serious environmental pollution and high cost. For this reason, an environmentally friendly soil stabilizer is proposed, which ensures the soil solidification strength while having the advantages of environmental protection, economy and high efficiency. Summary of the invention

[0005] In order to overcome the shortcomings of the above-mentioned prior art, the purpose of the present invention is to provide an environmentally friendly soil solidifier and a preparation method and application thereof, so as to solve the technical problems that the existing soil solidifiers will generate a large amount of dust and pollutants during production and use, causing serious impact on the ecological environment and consuming a large amount of resources.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: The present invention provides an environmentally friendly soil solidifying agent, which comprises the following raw materials by weight percentage: Plant ash 30% to 50%; Diatomaceous earth 25% to 35%; Coal-fired slag 6% to 27%; White carbon black 2% to 4%; Adhesive additive 2%~5%.

[0007] Preferably, the adhesive additive comprises sludge incineration product, talc and graphite, and the weight ratio of the sludge incineration product, talc and graphite is 15:3:4.

[0008] Preferably, the sludge incineration product includes SiO 2 、Al 2 O 3 , Fe 2 O 3 , CaO, MgO, Na 2 O and K 2 O.

[0009] Preferably, the coal-fired slag includes SiO 2 、Al 2 O 3 and Fe 2 O 3 .

[0010] Preferably, the environmentally friendly soil solidifier also includes an environmental improvement additive, wherein the weight ratio of the environmental improvement additive to wood ash is 5:3.

[0011] Preferably, the environment improvement agent includes one or more of wood vinegar, leek juice, onion water and garlic water.

[0012] Preferably, the environmental improvement agent is wood vinegar.

[0013] The present invention also provides a method for preparing the above-mentioned environmentally friendly soil solidifying agent, comprising weighing various raw materials according to weight ratio, mixing, grinding to a Blaine specific surface area of ​​500-800m 2 / kg, to produce an environmentally friendly soil stabilizer.

[0014] Preferably, the grinding is performed to a Blaine specific surface area of ​​700 m 2 / kg.

[0015] In the process of hydrating the raw materials in the above technical solution to form cement stone, the finer the raw materials are ground, the higher the final strength of the environmentally friendly soil solidifier generally obtained.

[0016] The present invention also provides application of the environmentally friendly soil solidifying agent in solidifying soil.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The invention provides an environmentally friendly soil solidifying agent, which achieves an efficient soil solidification effect through a reasonable raw material ratio. Plant ash, diatomite and coal-fired slag are used as raw materials for preparation. The plant ash has been subjected to high temperature treatment during the combustion process, and the ash particles after combustion are relatively large and are not easy to form fine dust. In the production process, the generation of dust can be further controlled by appropriate grinding and screening. Diatomite is deposited from the remains of ancient diatoms, has a porous structure, a large surface area and a strong adsorption capacity. This structure makes it difficult for diatomite to generate dust during preparation and use. Coal-fired slag particles are relatively large and are not easy to form fine dust. In the production process, the generation of dust can be further controlled by process treatments such as crushing and screening. In summary, these raw materials will not generate a large amount of dust and pollutants during production and use, and the degree of environmental pollution is reduced while reducing the consumption of natural resources. In addition, these raw materials are widely available, easy to obtain, and all belong to solid waste, which reduces production costs, has strong adaptability to soil, and realizes the secondary utilization of industrial waste. By controlling the water content of the raw materials, the uniformity and stability of the curing agent can be ensured. Excessive water content may affect the chemical reaction between the curing agent and the soil, thereby reducing the curing effect. Through the combination of adhesive additives and white carbon black, the soil structure can be improved, and the stability and bearing capacity of the soil can be effectively improved. Among them, white carbon black, as an inorganic filler, can improve the rigidity and wear resistance of the soil. White carbon black has a relatively large specific surface area, which can fill the tiny pores in the soil and increase the density of the soil, so that the soil can easily reach a qualified compaction degree during the curing construction process, which contributes to the soil curing strength. The silica component of white carbon black can react with the water and oxides in the soil through chemical reactions to form a gel structure and then form cement stone, exerting its gelling effect. The gelling effect can significantly enhance the strength and stability of the soil, making the cured soil more compact and durable. In addition, white carbon black has excellent water absorption. For soils with a large water content, it can adjust the moisture of the soil to avoid excessive water absorption and cause the soil structure to be loose; while the adhesive additive enhances the interaction between soil particles, making the cured soil more compact and stable.

[0018] Furthermore, the sludge incineration products in the adhesive additive contain high SiO 2 、Al 2 O 3The ingredients are highly active in chemical reactions. When they react with water and other ingredients in the soil, they can form silicate minerals. These minerals have excellent adhesion and stability. The formation process of silicate minerals is similar to the hydration reaction of cement, which can produce a gelling effect similar to cement stone. This gelling effect further significantly enhances the strength and stability of the soil, making the solidified soil more compact and durable. Talc is a layered silicate mineral with lubricity and dispersibility. In soil solidifiers, talc can form a lubricating film between soil particles, which helps to make the soil particles easier to arrange and disperse during the initial mixing process. The lubricating effect of talc can reduce the frictional resistance between soil particles, allowing the curing agent to penetrate into the soil more evenly, which helps to increase the contact area and adhesion between the curing agent and the soil particles, thereby enhancing the curing effect.

[0019] Furthermore, by setting up environmental improvement additives, soil health can be effectively maintained, providing reliable guarantee for the long-term stability of soil solidification. This innovative measure not only improves the functionality of soil stabilizers, but also helps to improve the soil environment. The natural substances in environmental improvement additives have antibacterial and insect repellent properties, which can reduce pests and diseases in the soil and improve the health of the soil.

[0020] Furthermore, among the environmental improvement additives, the main components of wood vinegar are acetic acid, phenols, and water, and the organic component acetic acid accounts for more than 10%. It can inhibit the reproduction of miscellaneous bacteria at low concentrations, and has antibacterial and anti-insect effects, which is beneficial to the overall health of the soil and indirectly promotes the soil solidification effect; leek juice is rich in broad-spectrum bactericides, which have killing and inhibitory effects on various cocci, bacilli, fungi, viruses, etc., and help reduce harmful microorganisms in the soil; onion water contains sulfur compounds and other bactericidal substances, which can inhibit bacterial reproduction and contribute to soil health; garlic water contains the bactericidal components of garlic, has a strong bactericidal effect, can repel insects, and contribute to soil health.

[0021] The present invention also provides a method for preparing the above-mentioned environmentally friendly soil solidifier, which is simple and easy to implement. By mixing and grinding the raw materials, a high-quality soil solidifier can be obtained. The grinding process ensures the uniformity and fineness of the solidifier, which is conducive to improving the curing effect and use efficiency. The specific surface area of ​​500-800m² / kg means that the particles are small and uniform, which helps the various components in the soil solidifier to mix and react better and improve the overall uniformity of the solidifier. The fine particles can increase the contact area between the soil solidifier and the soil particles, thereby increasing the bonding force between them. This is crucial for soil solidification, because stronger bonding means that the solidified soil is more compact and stable. At the same time, the method also meets the needs of industrial production and has broad application prospects.

[0022] Furthermore, the particles of the curing agent ground to a Blaine specific surface area of ​​700m² / kg are uniform in size and distribution. This uniformity not only improves the mixing uniformity of the curing agent and the soil, but also makes the curing effect of the curing agent in the soil more consistent, avoiding the difference in curing strength caused by uneven particle distribution.

[0023] The present invention also provides the use of the above-mentioned environmentally friendly soil solidifying agent in solidifying soil, and the soil solidifying agent can be used in multiple fields such as road construction, foundation treatment, soil improvement, etc. The solidified soil has excellent mechanical properties and stability, can withstand large loads and deformations, and reduces problems such as soil erosion and foundation settlement. This not only improves the quality of the project, but also saves raw material and energy costs, and has significant economic and social benefits. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to understand the characteristics and effects of the present invention, the following is a general description and definition of the terms and expressions mentioned in the specification and claims. Unless otherwise specified, all technical and scientific terms used in the text are the common meanings understood by those skilled in the art for the present invention. In the event of a conflict, the definition in this specification shall prevail.

[0025] The theories or mechanisms described and disclosed herein, whether correct or incorrect, should not limit the scope of the present invention in any way, that is, the present invention can be implemented without being limited by any specific theory or mechanism.

[0026] In this article, all features such as values, quantities, contents and concentrations defined in the form of numerical ranges or percentage ranges are for simplicity and convenience only. Accordingly, the description of numerical ranges or percentage ranges should be considered to have included and specifically disclosed all possible secondary ranges and individual values ​​within the range (including integers and fractions).

[0027] In this document, unless otherwise specified, “includes,” “including,” “contains,” “has,” or similar terms cover the meanings of “consisting of” and “mainly consisting of,” for example, “A includes a” covers the meanings of “A includes a and other” and “A only includes a.”

[0028] In this document, in order to make the description concise, not all possible combinations of various technical features in various embodiments or examples are described. Therefore, as long as there is no contradiction in the combination of these technical features, the various technical features in various embodiments or examples can be combined arbitrarily, and all possible combinations should be considered to be within the scope of this specification.

[0029] The present invention provides an environmentally friendly soil solidifying agent, which comprises the following raw materials by weight percentage: Plant ash 30% to 50%; Diatomaceous earth 25% to 35%; Coal-fired slag 6% to 27%; White carbon black 2% to 4%; Adhesive additive 2%~5%.

[0030] Environmentally friendly soil stabilizers can significantly improve the strength and stability of soil. Through chemical reactions, environmentally friendly soil stabilizers can change the physical and chemical properties of soil, making it form a more compact and stable structure. This strengthening effect allows the soil to withstand greater loads and pressures, thereby improving the bearing capacity and service life of infrastructure. Compared with traditional road construction materials, the use of environmentally friendly soil stabilizers can significantly save road construction costs. Environmentally friendly soil stabilizers can be made from local materials, using a wide range of natural soil as the basic material to replace traditional road construction materials such as cement and lime. This not only reduces material costs, but also reduces transportation and storage costs. At the same time, the construction process of environmentally friendly soil stabilizers is simple, the construction machinery required is basically the same as traditional road construction machinery, and the labor demand is reduced, thereby shortening the construction period.

[0031] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the appended claims of the application equally.

[0032] The following examples use conventional instruments and equipment in the art. The experimental methods in the following examples where specific conditions are not specified are usually carried out under conventional conditions or under conditions recommended by the manufacturer. The various raw materials used in the following examples are conventional commercial products unless otherwise specified, and their specifications are conventional specifications in the art. In the specification of the present invention and the following examples, unless otherwise specified, "%" means weight percentage, "part" means weight part, and ratio means weight ratio.

[0033] Example 1 An environmentally friendly soil solidifier comprises the following raw materials in percentage by weight: 50% of plant ash, 25% of diatomaceous earth, 2% of adhesive additive, 2% of white carbon black and 21% of coal-fired slag, wherein the water content of the plant ash, diatomaceous earth, adhesive additive, white carbon black and coal-fired slag is less than or equal to 1.5%, wherein the main chemical components of the coal-fired slag are shown in Table 1: Table 1

[0034] The adhesive additive includes sludge incineration products, talc and graphite. The weight ratio of sludge incineration products, talc and graphite is 15:3:4. Among them, the sludge incineration products are the products of riverbed sludge incineration, and its main chemical components are shown in Table 2: Table 2

[0035] It can be seen from Table 2 that SiO 2 The total content of Al accounts for 30% to 60%. It has high chemical stability and hardness. In soil solidification, it acts as a skeleton material to increase the rigidity and strength of the soil. It can also react with other oxides to form silicate minerals, which help to bond soil particles. 2 O 3 The total content of aluminum hydroxide accounts for 10% to 30%, which can react with water to form aluminum hydroxide colloid. Aluminum hydroxide colloid has a strong adsorption capacity and can adsorb tiny particles in the soil, promoting the agglomeration and solidification of soil particles. Under alkaline conditions, Al 2 O 3 It can also react with calcium ions to form hydraulic minerals, such as calcium aluminate, which further enhances the solidification effect of the soil. 2 O 3 The total content of CaO, MgO, and Na is 5% to 20%. As a catalyst, it promotes the reaction between other oxides and soil components. It can also react with silicate minerals to form more stable iron silicate minerals, thereby enhancing the durability of the soil. 2 O and K 2 The total content of O accounts for 5% to 20%, of which CaO is an alkaline oxide that can react with water to form calcium hydroxide. Calcium hydroxide has strong alkalinity and can neutralize the acidity of the soil and improve the pH value of the soil. It can also react with silicate minerals in the soil to form calcium silicate minerals. These minerals have high strength and good durability. MgO has similar properties to calcium oxide and can react with water to form magnesium hydroxide and participate in soil solidification reactions. Sodium oxide and potassium oxide can react with silicate minerals to form more complex silicate minerals, which play an auxiliary role in soil solidification.

[0036] It is further explained that talc has a layered structure, which can form a lubricating layer between soil particles, reduce the friction resistance between particles, and help the rearrangement and combination of soil particles.

[0037] Graphite has good conductivity and lubricity, and can act as a stabilizer in the soil solidification process, improving the soil's impermeability and durability.

[0038] Wood ash, diatomaceous earth, adhesive additive, white carbon black and coal slag are mixed and ground to a Blaine surface area of ​​700m 2 / kg, to produce an environmentally friendly soil stabilizer.

[0039] The specific components of the coal-fired slag and sludge incineration products in the following examples are the same as those in Example 1.

[0040] Example 2 An environmentally friendly soil solidifier comprises the following raw materials in percentage by weight: 40% of plant ash, 35% of diatomaceous earth, 2% of adhesive agent, 2% of white carbon black and 21% of coal-fired slag, wherein the water content of the plant ash, diatomaceous earth, adhesive agent, white carbon black and coal-fired slag is less than or equal to 1.5%. The adhesive agent comprises sludge incineration products, talc and graphite, and the weight ratio of sludge incineration products, talc and graphite is 15:3:4.

[0041] Mix wood ash, diatomaceous earth, adhesive additive, white carbon black and coal slag and grind them to a Blaine surface area of ​​700m 2 / kg, to produce an environmentally friendly soil stabilizer.

[0042] The environmentally friendly soil solidifier also includes an environmental improvement additive, wherein the weight ratio of the environmental improvement additive to the wood ash is 5:3, and the environmental improvement additive is wood vinegar.

[0043] Example 3 An environmentally friendly soil solidifier comprises the following raw materials in percentage by weight: 45% of plant ash, 30% of diatomaceous earth, 4% of adhesive additive, 3% of white carbon black and 18% of coal-fired furnace slag, wherein the water content of the plant ash, diatomaceous earth, adhesive additive, white carbon black and coal-fired furnace slag is less than or equal to 1.5%.

[0044] The adhesive additive comprises sludge incineration product, talc and graphite, and the weight ratio of the sludge incineration product, talc and graphite is 15:3:4.

[0045] Wood ash, diatomaceous earth, adhesive additive, white carbon black and coal slag are mixed and ground to a Blaine surface area of ​​700m 2 / kg, to produce an environmentally friendly soil stabilizer.

[0046] Example 4 An environmentally friendly soil solidifier comprises the following raw materials in percentage by weight: 45% of plant ash, 30% of diatomaceous earth, 4% of adhesive additive, 3% of white carbon black and 18% of coal-fired furnace slag, wherein the water content of the plant ash, diatomaceous earth, adhesive additive, white carbon black and coal-fired furnace slag is less than or equal to 1.5%.

[0047] The adhesive additive comprises sludge incineration product, talc and graphite, and the weight ratio of the sludge incineration product, talc and graphite is 15:3:4.

[0048] Wood ash, diatomaceous earth, adhesive additive, white carbon black and coal slag are mixed and ground to a Blaine surface area of ​​700m 2 / kg, to produce an environmentally friendly soil stabilizer.

[0049] The environmentally friendly soil solidifier also includes an environmental improvement additive, wherein the weight ratio of the environmental improvement additive to the wood ash is 5:3, and the environmental improvement additive is wood vinegar.

[0050] Example 5 An environmentally friendly soil solidifier comprises the following raw materials in percentage by weight: 50% of plant ash, 35% of diatomaceous earth, 5% of adhesive additive, 4% of white carbon black and 6% of coal-fired furnace slag, wherein the water content of the plant ash, diatomaceous earth, adhesive additive, white carbon black and coal-fired furnace slag is less than or equal to 1.5%.

[0051] The adhesive additive comprises sludge incineration product, talc and graphite, and the weight ratio of the sludge incineration product, talc and graphite is 15:3:4.

[0052] Wood ash, diatomaceous earth, adhesive additive, white carbon black and coal slag are mixed and ground to a Blaine surface area of ​​700m 2 / kg, to produce an environmentally friendly soil stabilizer.

[0053] Example 6 An environmentally friendly soil solidifier comprises the following raw materials in percentage by weight: 50% of plant ash, 35% of diatomaceous earth, 5% of adhesive additive, 4% of white carbon black and 6% of coal-fired furnace slag, wherein the water content of the plant ash, diatomaceous earth, adhesive additive, white carbon black and coal-fired furnace slag is less than or equal to 1.5%.

[0054] The adhesive additive comprises sludge incineration product, talc and graphite, and the weight ratio of the sludge incineration product, talc and graphite is 15:3:4.

[0055] Wood ash, diatomaceous earth, adhesive additive, white carbon black and coal slag are mixed and ground to a Blaine surface area of ​​700m 2 / kg, to produce an environmentally friendly soil stabilizer.

[0056] The environmentally friendly soil solidifier also includes an environmental improvement additive, wherein the weight ratio of the environmental improvement additive to the wood ash is 5:3, and the environmental improvement additive is wood vinegar.

[0057] Example 7 An environmentally friendly soil solidifier comprises the following raw materials in percentage by weight: 40% of plant ash, 35% of diatomaceous earth, 3.5% of adhesive additive, 4% of white carbon black and 17.5% of coal-fired furnace slag, wherein the water content of the plant ash, diatomaceous earth, adhesive additive, white carbon black and coal-fired furnace slag is less than or equal to 1.5%.

[0058] The adhesive additive comprises sludge incineration product, talc and graphite, and the weight ratio of the sludge incineration product, talc and graphite is 15:3:4.

[0059] Wood ash, diatomaceous earth, adhesive additive, white carbon black and coal slag are mixed and ground to a Blaine surface area of ​​700m 2 / kg, to produce an environmentally friendly soil stabilizer.

[0060] The environmentally friendly soil solidifying agent also includes an environmental improvement auxiliary agent, wherein the weight ratio of the environmental improvement auxiliary agent to the wood ash is 5:3, and the environmental improvement auxiliary agent is composed of wood vinegar and leek juice.

[0061] Example 8 An environmentally friendly soil solidifier comprises the following raw materials in percentage by weight: 41% of plant ash, 35% of diatomaceous earth, 3.5% of adhesive additive, 4% of white carbon black and 16.5% of coal-fired furnace slag, wherein the water content of the plant ash, diatomaceous earth, adhesive additive, white carbon black and coal-fired furnace slag is less than or equal to 1.5%.

[0062] The adhesive additive comprises sludge incineration product, talc and graphite, and the weight ratio of the sludge incineration product, talc and graphite is 15:3:4.

[0063] Wood ash, diatomaceous earth, adhesive additive, white carbon black and coal slag are mixed and ground to a Blaine surface area of ​​500m 2 / kg, to produce an environmentally friendly soil stabilizer.

[0064] The environmentally friendly soil solidifier also includes an environmental improvement additive, wherein the weight ratio of the environmental improvement additive to wood ash is 5:3, and the environmental improvement additive is wood vinegar, leek juice and onion water.

[0065] Example 9 An environmentally friendly soil solidifier comprises the following raw materials in percentage by weight: 30% of plant ash, 35% of diatomaceous earth, 4% of adhesive additive, 4% of white carbon black and 27% of coal-fired furnace slag, wherein the water content of the plant ash, diatomaceous earth, adhesive additive, white carbon black and coal-fired furnace slag is less than or equal to 1.5%.

[0066] The adhesive additive comprises sludge incineration product, talc and graphite, and the weight ratio of the sludge incineration product, talc and graphite is 15:3:4.

[0067] Wood ash, diatomaceous earth, adhesive additive, white carbon black and coal slag are mixed and ground to a Blaine surface area of ​​800m 2 / kg, to produce an environmentally friendly soil stabilizer.

[0068] The environmentally friendly soil solidifier also includes an environmental improvement auxiliary agent, wherein the weight ratio of the environmental improvement auxiliary agent to the plant ash is 5:3, and the environmental improvement auxiliary agent is garlic water.

[0069] When used, for Example 1, Example 3 and Example 5, during use, the plant ash, diatomaceous earth, adhesive additive, white carbon black and coal slag are mixed evenly and ground to a Blaine specific surface area of ​​700m 2 / kg, obtain an environmentally friendly soil stabilizer, add the environmentally friendly soil stabilizer to the sandy soil in a ratio of 1:5, mix evenly, spray three times the amount of water as the environmentally friendly soil stabilizer during the process, and after compaction and maintenance, the sandy soil can be solidified, wherein the sandy soil is less than or equal to 3%.

[0070] When used, for Example 2, Example 4 and Example 6, during use, the plant ash, diatomaceous earth, adhesive additive, white carbon black and coal slag are mixed evenly and ground to a Blaine specific surface area of ​​700m 2 / kg, obtain an environmentally friendly soil stabilizer, add the environmentally friendly soil stabilizer to the sandy soil in a ratio of 1:5, and mix evenly. During the process, weigh the environmental improvement additive and the remainder of water, mix well, and obtain a mixed liquid three times the amount of the environmentally friendly soil stabilizer, spray it into the sandy soil, and after compaction and maintenance, the sandy soil can be solidified, wherein the sandy soil is less than or equal to 3%.

[0071] Strength detection Sandy soil with a water content less than or equal to 3% was taken and divided into thirty groups of samples. The soil was reinforced according to the methods of Example 1, Example 2, Example 3, Example 4, Example 5 and Example 6, respectively, to obtain six groups of experimental samples corresponding to Example 1, Example 2, Example 3, Example 4, Example 5 and Example 6, wherein each group of experimental samples includes five samples to avoid errors caused by operation. The six groups of experimental samples were placed in the same environment for curing, and unconfined compressive strength tests were performed after 7 days. Specifically, the samples were made into standard cylindrical specimens with a diameter of 50 mm and a height of 50 mm. The standard cylindrical specimens were placed in a pressure testing machine for compressive strength testing. The axial strain rate of the pressure testing machine should be controlled within the range of 1% to 3% strain per minute. When the dynamometer reading shows a peak value, the test is stopped after continuing to strain by 3% to 5%; when there is no peak value in the reading, the test should be carried out until the strain reaches 20%. The 7d compressive strength test results are averaged in the same group, and the results are shown in Table 3: Table 3

[0072] It can be seen from Table 3 that when the environmentally friendly soil solidifiers proposed in Example 1, Example 2, Example 3, Example 4, Example 5 and Example 6 are used to reinforce sandy soil, it can be seen that the reinforcement effects of the environmentally friendly soil solidifiers proposed in Example 2, Example 4 and Example 6 are better than the reinforcement effects of the environmentally friendly soil solidifiers proposed in Example 1, Example 3 and Example 5, respectively, that is, the soil solidifier with the addition of the environmental improvement additive has a better reinforcement effect.

[0073] The above contents are only for explaining the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. An environmentally friendly soil solidifier, characterized in that: The following raw materials are included by weight percentage: Plant ash 30% to 50%; Diatomaceous earth 25% to 35%; Coal-fired slag 6% to 27%; White carbon black 2% to 4%; Adhesive additive 2%~5%.

2. An environmentally friendly soil solidifier according to claim 1, characterized in that: The adhesive additive comprises sludge incineration product, talc and graphite, and the weight ratio of the sludge incineration product, talc and graphite is 15:3:

4.

3. An environmentally friendly soil solidifier according to claim 2, characterized in that: The sludge incineration products include SiO2, Al2O3, Fe2O3, CaO, MgO, Na2O and K2O.

4. The environmentally friendly soil solidifier according to claim 1, characterized in that: The coal-fired furnace slag includes SiO2, Al2O3 and Fe2O3.

5. The environmentally friendly soil solidifier according to claim 1, characterized in that: The environmentally friendly soil solidifier also includes an environmental improvement additive, wherein the weight ratio of the environmental improvement additive to the wood ash is 5:

3.

6. The environmentally friendly soil solidifier according to claim 5, characterized in that: The environment improvement aid includes one or more of wood vinegar, leek juice, onion water and garlic water.

7. The environmentally friendly soil solidifying agent according to claim 6, characterized in that: The environment improvement auxiliary agent is wood vinegar.

8. The method for preparing an environmentally friendly soil solidifying agent according to any one of claims 1 to 7, characterized in that: It includes weighing the raw materials according to the weight ratio, mixing them, and grinding them to a Blaine specific surface area of ​​500-800m 2 / kg, to produce an environmentally friendly soil stabilizer.

9. The method for preparing an environmentally friendly soil solidifying agent according to claim 8, characterized in that: Grind to a Blaine surface area of ​​700m 2 / kg.

10. Use of the environmentally friendly soil solidifier according to any one of claims 1 to 7 in solidifying soil.

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