Soil stabilizer and preparation method thereof

Abstract

The invention relates to the technical field of curing agents, in particular to a soil curing agent and a preparation method thereof.The soil curing agent is prepared from, by weight, 180-220 parts of fly ash, 160-180 parts of slag, 80-120 parts of calcium salt, 80-120 parts of potassium nitrate, 10-14 parts of microbial agents, 40-60 parts of sustained-release capsule particles and 20-30 parts of biological stimulants. Therefore, the soil structure is improved, and the content of large aggregates in the soil can be remarkably increased.

Description

Technical Field

[0002] This invention relates to the field of soil stabilizer technology, specifically to a soil stabilizer and its preparation method. Background Technology

[0003] Soil stabilizers are a type of composite material that can improve and enhance the performance of soil engineering technology. They are applied to various types of soil. The components of soil stabilizers include inorganic compounds, organic compounds, and biological agents. Among them, microbial agents are an important type of biological agent. By providing specific microorganisms with nutrients rich in calcium ions and nitrogen sources, they induce calcium carbonate deposition to solidify the soil and are also more environmentally friendly.

[0004] Microorganisms can decompose organic matter in soil, releasing polysaccharides and other metabolites. These substances can act as natural binders, promoting the aggregation of soil particles and making the soil more compact. How to promote the rapid and long-term release of polysaccharides and other metabolites by microorganisms in the soil is an urgent research question.

[0005] Based on this, this solution provides a soil stabilizer and its preparation method, which promotes the generation of natural binders through clever component composition and improves the soil stabilization effect. Summary of the Invention

[0006] In view of the above situation and to overcome the shortcomings of the prior art, the present invention provides a soil stabilizer and its preparation method.

[0007] The technical solution adopted in this invention is as follows: a soil stabilizer, comprising the following components in parts by weight: 180-220 parts fly ash, 160-180 parts slag, 80-120 parts calcium salt, 80-120 parts potassium nitrate, 10-14 parts microbial agent, 40-60 parts sustained-release capsule granules, and 20-30 parts biostimulant.

[0008] Furthermore, the microbial agent contains one or more of Bacillus licheniformis, Bacillus atrophus, and halophilic Bacillus.

[0009] Furthermore, the core material of the sustained-release capsule particles is a mineral salt.

[0010] Furthermore, the biostimulant is one or more of amino acids and vitamins.

[0011] Furthermore, the calcium salt is one or more of calcium chloride, calcium nitrate, and calcium sulfate.

[0012] This invention also discloses a method for preparing a soil stabilizer, comprising the following steps: Step 1: Weigh each component according to its weight. Step two: First, mix fly ash, slag, calcium salt, potassium nitrate, sustained-release capsule granules, and biostimulant evenly, then add microbial inoculant and mix evenly.

[0013] The beneficial effects achieved by the present invention using the above structure are as follows: 1. The use of fly ash and slag can increase the soil's impermeability and reduce soil erosion; 2. Microbial-induced calcium chloride deposition is a biogeological engineering method that utilizes the metabolic processes of microorganisms to promote calcium chloride deposition, thereby enhancing the mechanical strength of the soil. During this process, nutrients containing calcium ions and nitrogen sources are indispensable components, as they provide the nutrients needed for microbial growth and enzyme activity, improving construction efficiency, reducing resource consumption, and effectively protecting the ecological environment. Specifically, calcium salts provide the calcium ions required for microbial-induced calcium carbonate deposition, while potassium nitrate provides the nitrogen source. 3. Microbial stimulants contain organic or inorganic nutrients, such as amino acids, vitamins, and minerals. The formulation of biostimulants and sustained-release capsules improves the soil environment, promotes the production of extracellular polysaccharides by microorganisms in the soil, thereby improving soil structure and significantly increasing the content of large soil aggregates.

[0014] 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.

[0015] Example 1: A soil stabilizer comprising the following components in parts by weight: 180 parts fly ash, 160 parts slag, 80 parts sodium chloride, 80 parts potassium nitrate, 10 parts microbial inoculant, 40 parts sustained-release capsule granules, 10 parts amino acids, and 10 parts vitamins.

[0016] Among them, the microbial inoculant contains one or more of Bacillus licheniformis, Bacillus atrophus, and halophilic Bacillus. These bacteria can produce large amounts of extracellular polysaccharides in the soil, thereby improving soil structure and increasing the content of soil macroaggregates.

[0017] Sodium chloride, as a nutrient salt containing calcium ions, provides the calcium ions needed for microbial-induced calcium carbonate deposition. Potassium nitrate, as a nitrogen source nutrient salt, is an important nutrient for microbial growth. The wall material of the slow-release capsule particles is a biodegradable material, and the core material is a mineral salt. Through the slow-release effect of the slow-release capsule particles, the mineral salt is gradually released to gradually increase the salt concentration in the soil and promote the secretion of extracellular polysaccharides (EPS) by microorganisms.

[0018] Amino acids and vitamins, as biostimulants, can stimulate the growth and activity of microorganisms and improve soil structure.

[0019] This invention also discloses a method for preparing a soil stabilizer, comprising the following steps: Step 1: Weigh each component according to its weight. Step two: First, mix fly ash, slag, sodium chloride, potassium nitrate, amino acids, vitamins, and sustained-release capsule granules evenly, then add microbial inoculant and mix evenly.

[0020] Example 2, a soil stabilizer, comprising the following components in parts by weight: 200 parts fly ash, 170 parts slag, 100 parts calcium nitrate, 100 parts potassium nitrate, 12 parts microbial inoculant, 50 parts sustained-release capsule granules, and 25 parts amino acids.

[0021] The microbial agent contains one or more of Bacillus licheniformis, Bacillus atrophus, and halophilic Bacillus.

[0022] Calcium nitrate is a nutrient salt containing calcium ions. In addition to providing calcium ions, this salt also provides a nitrogen source, which helps support the growth of microorganisms.

[0023] This invention also discloses a method for preparing a soil stabilizer, comprising the following steps: Step 1: Weigh each component according to its weight. Step two: Mix fly ash, slag, calcium nitrate, potassium nitrate, sustained-release capsule granules, and amino acids evenly, then add microbial inoculants and mix evenly.

[0024] Example 3, a soil stabilizer, comprising the following components in parts by weight: 220 parts fly ash, 180 parts slag, 120 parts calcium sulfate, 120 parts potassium nitrate, 14 parts microbial agent, 60 parts sustained-release capsule granules, and 30 parts vitamins.

[0025] The microbial agent contains one or more of Bacillus licheniformis, Bacillus atrophus, and halophilic Bacillus.

[0026] Calcium sulfate is also a calcium salt and can be used as a source of calcium ions in the MICP process.

[0027] This invention also discloses a method for preparing a soil stabilizer, comprising the following steps: Step 1: Weigh each component according to its weight. Step two: Mix fly ash, slag, calcium sulfate, potassium nitrate, amino acids, sustained-release capsule granules, and vitamins evenly, then add microbial inoculants and mix evenly.

[0028] The differences between the data from Examples 1-3 and Comparative Examples 1-2 are shown in the table below: The compressive strength and curing time of this design are significantly improved.

[0029] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A soil stabilizer, characterized in that, It includes the following components by weight: 180-220 parts fly ash, 160-180 parts slag, 80-120 parts calcium salt, 80-120 parts potassium nitrate, 10-14 parts microbial inoculant, 40-60 parts sustained-release capsule granules, and 20-30 parts biostimulant.

2. The soil stabilizer according to claim 1, characterized in that, It includes the following components by weight: 200 parts fly ash, 170 parts slag, 100 parts calcium salt, 100 parts potassium nitrate, 12 parts microbial inoculant, 50 parts sustained-release capsule granules, and 25 parts biostimulant.

3. The soil stabilizer according to claim 1, characterized in that, The microbial agent contains one or more of Bacillus licheniformis, Bacillus atrophus, and halophilic Bacillus.

4. A soil stabilizer according to claim 1, characterized in that, The core material of the sustained-release capsule particles is a mineral salt.

5. A soil stabilizer according to claim 4, characterized in that, The calcium salt is one or more of calcium chloride, calcium nitrate, and calcium sulfate.

6. A soil stabilizer according to claim 1, characterized in that, The biostimulant is one or more of amino acids and vitamins.

7. A soil stabilizer according to claim 1, characterized in that, The wall material of the sustained-release capsule is a biodegradable material.

8. A method for preparing a soil stabilizer according to claims 1-7, characterized in that, Includes the following steps: Step 1: Weigh each component according to its weight. Step two: First, mix fly ash, slag, calcium salt, potassium nitrate, sustained-release capsule granules, and biostimulant evenly, then add microbial inoculant and mix evenly.

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