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CN-122010516-A - Light soil curing agent and preparation method and application thereof

CN122010516ACN 122010516 ACN122010516 ACN 122010516ACN-122010516-A

Abstract

The invention provides a light soil curing agent and a preparation method and application thereof, and belongs to the technical field of soil engineering materials. The lightweight soil curing agent comprises, by weight, 0-10 parts of red mud, 0-10 parts of steel slag, 40-60 parts of mineral powder, 20-30 parts of gypsum, 10-20 parts of carbide slag, 5-10 parts of foaming agent, 0.5-2 parts of foam stabilizer and 70-100 parts of water, wherein the foaming agent is a mixture of sodium bicarbonate and aluminum potassium sulfate. The invention adopts red mud, steel slag, mineral powder, gypsum, carbide slag, foaming agent and foam stabilizer to prepare the light soil curing agent, and adopts CO 2 as foaming gas, so that the obtained soil curing agent not only has good mechanical property and construction property, but also can absorb a large amount of solid waste, and can be applied to closed or underground construction projects such as slope restoration, tunnels, goafs and the like on a large scale.

Inventors

  • WANG CHUNWEI
  • WANG YANFENG
  • HUANG XIAOYAN
  • FENG YANLIANG

Assignees

  • 北科蕴宏环保科技(北京)有限公司
  • 山西蕴宏环境科技发展有限责任公司

Dates

Publication Date
20260512
Application Date
20260211

Claims (10)

  1. 1. The light soil curing agent is characterized by comprising the following raw materials in parts by weight: 0-10 parts of red mud; 0-10 parts of steel slag; 40-60 parts of mineral powder; 20-30 parts of gypsum; 10-20 parts of carbide slag; 5-10 parts of foaming agent; 0.5-2 parts of foam stabilizer; 70-100 parts of water; wherein the weight parts of the red mud and the steel slag are different from each other and are 0, and the foaming agent is a mixture of sodium bicarbonate and aluminum potassium sulfate.
  2. 2. The lightweight soil stabilizer according to claim 1, wherein the mass ratio of sodium bicarbonate to aluminum potassium sulfate in the foaming agent is 3:1.
  3. 3. The lightweight soil conditioner of claim 1, wherein the foam stabilizer is selected from at least one of hydroxypropyl methyl cellulose ether, dodecyl dimethyl ammonium oxide, and coco diethanol amide.
  4. 4. The lightweight soil stabilizer according to claim 1, wherein the mineral powder is grade S95 mineral powder with a particle size of 20 μm or less.
  5. 5. The lightweight soil conditioner of claim 1, wherein the gypsum is at least one of industrial desulfurized gypsum, phosphogypsum and titanium gypsum.
  6. 6. The lightweight soil stabilizer according to claim 1, wherein the CaO content in the carbide slag is greater than 50%.
  7. 7. A method for preparing the lightweight soil conditioner as claimed in any one of claims 1 to 6, comprising the steps of: Weighing the raw materials according to the parts by weight, mixing the raw materials, and uniformly stirring to obtain the light soil curing agent.
  8. 8. The method of lightweight soil stabilizer according to claim 7, wherein the stirring time is not more than 5 minutes.
  9. 9. A light-weight fluid-state solidified soil, characterized by comprising the light-weight soil solidifying agent according to any one of claims 1 to 6, the preparation method of the light-weight fluid-state solidified soil comprising the steps of: (1) Mixing and stirring an engineering soil sample and water to obtain slurry; (2) Adding the light soil stabilizer of any one of claims 1-6 into the slurry, mixing, and stirring uniformly to obtain slurry; (3) And pouring, forming, foaming and curing the slurry to obtain the light-weight fluid-state solidified soil.
  10. 10. Use of a lightweight soil-curing agent according to any one of claims 1 to 6 and/or a lightweight fluid-state cured soil according to claim 9 in soft soil foundation treatment, slope restoration, roadbed load-shedding filling, abutment back-backfilling or tunnel goaf filling projects.

Description

Light soil curing agent and preparation method and application thereof Technical Field The invention belongs to the technical field of soil engineering materials, and particularly relates to a light soil curing agent and a preparation method and application thereof. Background With the high-quality development of social economy, the construction scale of infrastructures is continuously enlarged, and engineering construction faces a plurality of challenges in the fields of road engineering, bridge engineering and the like. In particular, under narrow working space or complex geological conditions, the traditional backfill material cannot meet the quality and progress requirements of modern engineering construction due to technical bottlenecks such as difficult achievement of compactness, obvious settlement after construction, low construction efficiency and the like. The fluid solidified soil is used as a novel geotechnical engineering material, is prepared by taking soil materials or industrial residue soil as a base material and is prepared by accurately proportioning a curing agent and water. The material has the remarkable engineering advantages that the material can realize self-leveling and self-compaction filling in a narrow and complicated construction environment due to the high fluidity, the manual intervention is effectively reduced, the construction efficiency is improved, the self-compaction performance ensures the integrity and compactness of filling, and the collapse risk caused by the insufficient compaction of the traditional backfill layering is remarkably reduced. Meanwhile, the fluid-state solidified soil has stable mechanical properties, is outstanding in impermeability and durability, and can meet the technical requirements of various engineering bearing conditions. However, in some engineering scenes, for example, when the problems of uneven settlement of roadbed, jump of bridge head, excessive earth pressure of retaining wall and the like are solved, the load-reducing treatment is required to be carried out on the construction part. Based on the engineering requirement, the fluid-state solidified soil is optimized into light-weight fluid-state solidified soil, so that the backfill material is converted from heavy load to light load, and the method becomes an effective way for solving the engineering problem. Therefore, the light soil solidifying agent with excellent fluidity, stability and light weight characteristics is provided, and has important significance for promoting the progress of geotechnical engineering technology and improving the engineering construction quality. Disclosure of Invention In order to solve the technical problems, the invention provides a light soil curing agent, a preparation method and application thereof, and the prepared light soil curing agent has the advantages of light weight, good fluidity, stable performance, low cost and convenient construction, can effectively play the functions of load reduction, filling and seepage prevention, and solves the problems of uneven settlement, bridge head jumping and the like in the partial engineering field caused by the existing fluid state cured soil. In order to achieve the above purpose, the present invention provides the following technical solutions: The invention provides a light soil curing agent which comprises the following raw materials in parts by weight: 0-10 parts of red mud; 0-10 parts of steel slag; 40-60 parts of mineral powder; 20-30 parts of gypsum; 10-20 parts of carbide slag; 5-10 parts of foaming agent; 0.5-2 parts of foam stabilizer; 70-100 parts of water; the foaming agent is a mixture of sodium bicarbonate and aluminum potassium sulfate and is used for generating carbon dioxide gas for foaming after the curing agent is mixed with water. The invention takes industrial solid waste (red mud, steel slag, mineral powder, carbide slag and industrial gypsum) as a main body, utilizes volcanic ash activity of materials such as mineral powder, red mud and the like, promotes depolymerization of silicon oxygen tetrahedron to release active ions under the excitation action of alkali and sulfate, promotes the addition of alkali metal cations to promote the silicon oxygen tetrahedron to repolymerize to form hydration products with stable structure, and generates double hydrolysis reaction after the foaming agent (sodium bicarbonate and aluminum potassium sulfate) is mixed with water, wherein Al 3++3HCO3-=Al(OH)3↓+3CO2↑,CO2 gas forms uniform bubbles under the action of a foam stabilizer to realize lightening of the curing agent, and the proportioning range of the raw materials ensures balance of cementing strength and light characteristic and avoids insufficient strength caused by excessive solid waste or loose structure caused by excessive foaming agent. Further, the mass ratio of sodium bicarbonate to aluminum potassium sulfate in the foaming agent is 3:1. The ratio of sodium bicarbonate (HCO 3- donor) t