Fluidized solidified soil and proportioning optimization method and application thereof
By optimizing the ratio of fluid-cured soil, combined with clay, medium sand, silt and other materials, the existing fluid-cured soil is easily cracked, insufficient compressive strength and permeability, and higher density and engineering quality are achieved.
Patent Information
- Application Number
- CN202411916174.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-24
- Publication Date
- 2025-03-28
AI Technical Summary
The existing fluid-cured soil is prone to cracking after curing, has low compressive strength and permeability, resulting in low construction efficiency and poor project quality.
By optimizing the ratio, fluid solidified soil with good fluidity was prepared using 20-50 parts of clay, 20-40 parts of medium sand, 5-30 parts of silt, 8-15 parts of silicate cement, 3-8 parts of quicklime, 10-20 parts of fly ash, 0.5-1.2 parts of polycarboxylic acid-based water reducing agent, 1-2 parts of sodium sulfate premature enhancer, and 0.1-0.3 parts of sodium gluconate retarder to prepare a fluid solidified soil with good fluidity.
The compactness of the soil and the permeability, expansion, slump and unbounded compressive strength of the fluid-stable solidified soil are improved, and the stability of construction and engineering quality are enhanced.
Smart Images
Figure BDA0005206867970000041
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of building materials, and in particular to a fluidized solidified soil and a proportion optimization method and application thereof. Background Art
[0002] When faced with situations where the foundation pit backfill space is narrow, the underground comprehensive pipeline corridor has a complex shape, and there are multiple narrow and independent backfill sections on the construction surface, large and medium-sized compaction machinery cannot be used due to the narrow space on the construction site, and only manual compaction can be used for compaction, resulting in low construction efficiency and insufficient backfill soil density. Therefore, fluidized solidified soil is often used for construction in engineering projects.
[0003] Fluidized solidified soil is made of soil and solidifying agent as main raw materials, which is mixed with water to obtain a filling material with good fluidity. However, the existing fluidized solidified soil shrinks greatly and is easy to crack during the drying process of the solidified soil, and the compressive strength and impermeability after drying and solidification are low, resulting in frequent water seepage and surface cracking, which seriously affects the quality of the project.
[0004] Practical Invention Content
[0005] The technical problem solved by the invention is to provide a fluidized solidified soil with good impermeability, expansion, slump, surface state and unconfined compressive strength, and a method and application of its proportion optimization.
[0006] In order to solve the above technical problems, the present invention provides fluidized solidified soil and a method and application of optimizing its proportion, wherein the fluidized solidified soil comprises: a soil material component, a curing agent component and an admixture component; the soil material is composed of 20-50 parts of clay, 20-40 parts of medium sand and 5-30 parts of silt, the curing agent component is composed of 8-15 parts of Portland cement, 3-8 parts of quicklime and 10-20 parts of fly ash, and the admixture component is composed of 0.5-1.2 parts of a polycarboxylic acid water reducer, 1-2 parts of a sodium sulfate early strength agent and 0.1-0.3 parts of a sodium gluconate retarder.
[0007] Preferably, the particle size of the medium sand is between 0.02 mm and 0.5 mm, and the particle size of the silt is concentrated between 0.005 mm and 0.075 mm.
[0008] Preferably, the fly ash fineness is less than 20% on a 45 μm square mesh sieve, and the loss on ignition is less than 5%.
[0009] Preferably, the silt particle size is less than 0.075mm, the liquid limit is between 30%-45%, and the plastic limit is about 15%-25%. The clay has a liquid limit of 30%-50%, a plastic limit of 10%-30%, the content of particles less than 0.005mm is not less than 60%, and the mud content does not exceed 5%.
[0010] Preferably, the medium sand is quartz medium sand, and the main component of the medium sand is quartz (SiO2).
[0011] Compared with the related art, the fluidized solidified soil and its ratio optimization method and application provided by the present invention have the following beneficial effects:
[0012] The present invention provides a fluidized solidified soil and a method and application for optimizing its proportion. The fluidized solidified soil is composed of clay, medium sand, silt, silicate cement, quicklime, fly ash, polycarboxylic acid water reducer, sodium sulfate early strength agent and sodium gluconate retarder. In the formula, silt particles can enter the tiny pores formed by the accumulation of clay particles, making the particle gradation of the soil material more continuous and reasonable. Thereby, the compactness of the soil material is improved, and the workability of the fluidized solidified soil, including cohesiveness and water retention, can be improved by fly ash. It can make the solidified soil more uniform during the mixing process, prevent segregation, increase the volume stability and bearing capacity of the prepared fluidized solidified soil, not only realize the in-situ resource utilization of slag, but also finally form a fluidized solidified soil with good impermeability, expansion, slump, surface state and unconfined compressive strength. DETAILED DESCRIPTION
[0013] Embodiment 1
[0014] The present embodiment provides a fluidized solidified soil, comprising: a soil material component, a curing agent component and an admixture component; the soil material is composed of 50 parts of clay, 40 parts of medium sand and 30 parts of silt, the curing agent component is composed of 15 parts of Portland cement, 8 parts of quicklime and 20 parts of fly ash, the admixture component is composed of 1.2 parts of a polycarboxylic acid-based water reducer, 2 parts of a sodium sulfate early strength agent and 0.3 parts of a sodium gluconate retarder, the medium sand has a particle size between 0.02 mm and 0.5 mm, the silt is The particle size is concentrated in the range of 0.005mm-0.075mm, the fly ash fineness is 45μm square hole sieve residue does not exceed 20%, the ignition loss does not exceed 5%, the silt particle size is less than 0.075mm, the liquid limit is between 30%-45%, the plastic limit is about 15%-25%, the clay liquid limit is 30%-50%, the plastic limit is 10%-30%, the content of particles less than 0.005mm is not less than 60%, the mud content does not exceed 5%, and the medium sand is quartz, and the main component of the medium sand is quartz (SiO2).
[0015] The method for optimizing the proportion of fluidized solidified soil comprises the following steps:
[0016] S1: crush the clay and remove foreign matter from the clay;
[0017] S2: Weigh clay, medium sand and silt, mix and stir to prepare soil components;
[0018] S3: weighing silicate cement, quicklime and fly ash, mixing and stirring to prepare a curing agent component;
[0019] S4: weighing a polycarboxylic acid water reducer, a sodium sulfate early strength agent and a sodium gluconate retarder to prepare an admixture component;
[0020] S5: Mix and stir the prepared qualified soil component, curing agent component and admixture component and add water to prepare premixed fluidized solidified soil, wherein the added water is clean fresh water, and the amount of the added water is 40-70% of the total mass of dry soil in the soil component, curing agent component and admixture component.
[0021] The present embodiment provides a fluidized solidified soil, comprising: a soil material component, a curing agent component and an admixture component; the soil material is composed of 20 parts of clay, 20 parts of medium sand and 5 parts of silt, the curing agent component is composed of 8 parts of Portland cement, 3 parts of quicklime and 10 parts of fly ash, the admixture component is composed of 0.5 parts of polycarboxylic acid water reducer, 1 part of sodium sulfate early strength agent and 0.1 parts of sodium gluconate retarder, the medium sand particle size is between 0.02 mm and 0.5 mm, the silt particle size is The fly ash fineness is concentrated in the range of 0.005mm-0.075mm. The residue on the 45μm square hole sieve does not exceed 20%, and the loss on ignition does not exceed 5%. The particle size of the silt is less than 0.075mm, the liquid limit is between 30%-45%, and the plastic limit is around 15%-25%. The liquid limit of the clay is 30%-50%, the plastic limit is 10%-30%, the content of particles less than 0.005mm is not less than 60%, and the mud content does not exceed 5%. The medium sand is quartz and the main component of the medium sand is quartz (SiO2).
[0022] The method for optimizing the proportion of fluidized solidified soil comprises the following steps:
[0023] S1: crush the clay and remove foreign matter from the clay;
[0024] S2: Weigh clay, medium sand and silt, mix and stir to prepare soil components;
[0025] S3: weighing silicate cement, quicklime and fly ash, mixing and stirring to prepare a curing agent component;
[0026] S4: weighing a polycarboxylic acid water reducer, a sodium sulfate early strength agent and a sodium gluconate retarder to prepare an admixture component;
[0027] S5: Mix and stir the prepared qualified soil component, curing agent component and admixture component and add water to prepare premixed fluidized solidified soil, wherein the added water is clean fresh water, and the amount of the added water is 40-70% of the total mass of dry soil in the soil component, curing agent component and admixture component.
[0028] Embodiment 3
[0029] The present embodiment provides a fluidized solidified soil, comprising: a soil material component, a curing agent component and an admixture component; the soil material is composed of 35 parts of clay, 30 parts of medium sand and 17.5 parts of silt; the curing agent component is composed of 11.5 parts of Portland cement, 5.5 parts of quicklime and 15 parts of fly ash; the admixture component is composed of 0.85 parts of a polycarboxylic acid water reducer, 1.5 parts of a sodium sulfate early strength agent and 0.2 parts of a sodium gluconate retarder; the particle size of the medium sand is between 0.02 mm and 0.5 mm; The particle size of the silt is concentrated in the range of 0.005mm-0.075mm, the fly ash fineness is less than 20% on a 45μm square hole sieve, the loss on ignition is less than 5%, the particle size of the silt is less than 0.075mm, the liquid limit is between 30%-45%, and the plastic limit is around 15%-25%, the liquid limit of the clay is 30%-50%, the plastic limit is 10%-30%, the content of particles less than 0.005mm is not less than 60%, the mud content is less than 5%, and the medium sand is quartz, the main component of which is quartz (SiO2).
[0030] The method for optimizing the proportion of fluidized solidified soil comprises the following steps:
[0031] S1: crush the clay and remove foreign matter from the clay;
[0032] S2: Weigh clay, medium sand and silt, mix and stir to prepare soil components;
[0033] S3: weighing silicate cement, quicklime and fly ash, mixing and stirring to prepare a curing agent component;
[0034] S4: weighing a polycarboxylic acid water reducer, a sodium sulfate early strength agent and a sodium gluconate retarder to prepare an admixture component;
[0035] S5: Mix and stir the prepared qualified soil component, curing agent component and admixture component and add water to prepare premixed fluidized solidified soil, wherein the added water is clean fresh water, and the amount of the added water is 40-70% of the total mass of dry soil in the soil component, curing agent component and admixture component.
[0036]
[0037] Through testing, it can be known that the fluidized solidified soil provided by the embodiment of the present application has excellent performance in terms of impermeability, expansion, slump, surface state and unconfined compressive strength, which meet the relevant standards. Therefore, the fluidized solidified soil of the present invention can show excellent comprehensive performance under different engineering environments, such as in road base engineering, it can withstand large traffic loads and has good impermeability; in foundation treatment engineering, it can quickly solidify stable foundations and maintain strength and stability for a long time, and has obvious cost advantages when applied on a large scale; its preparation method has a simple process, helps to improve production efficiency, has low process cost, and is more conducive to actual production promotion and application.
Claims
1. A fluidized solidified soil, characterized in that: The fluidized solidified soil comprises: a soil material component, a curing agent component and an admixture component; the soil material is composed of 20-50 parts of clay, 20-40 parts of medium sand and 5-30 parts of silt, the curing agent component is composed of 8-15 parts of Portland cement, 3-8 parts of quicklime and 10-20 parts of fly ash, and the admixture component is composed of 0.5-1.2 parts of a polycarboxylic acid water reducer, 1-2 parts of a sodium sulfate early strength agent and 0.1-0.3 parts of a sodium gluconate retarder.
2. The fluidized solidified soil according to claim 1, characterized in that: The particle size of the medium sand is between 0.02mm and 0.5mm, and the particle size of the silt is concentrated between 0.005mm and 0.075mm.
3. The fluidized solidified soil according to claim 2, characterized in that: The fly ash fineness is less than 20% on a 45 μm square mesh sieve, and the loss on ignition is less than 5%.
4. The method for optimizing the mix ratio of fluidized solidified soil according to claim 1, characterized in that: The silt particle size is less than 0.075mm, the liquid limit is between 30%-45%, and the plastic limit is about 15%-25%. The clay has a liquid limit of 30%-50%, a plastic limit of 10%-30%, and the content of particles less than 0.005mm is not less than 60%, and the mud content does not exceed 5%.
5. The method for optimizing the mix ratio of fluidized solidified soil according to claim 4 comprises the following steps: the medium sand is quartz medium sand, the main component of which is quartz (SiO2).
6. The method for optimizing the mix ratio of fluidized solidified soil according to any one of claims 1 to 5, characterized in that: The steps include: S1: crush the clay and remove foreign matter from the clay; S2: Weigh clay, medium sand and silt, mix and stir to prepare soil components; S3: weighing silicate cement, quicklime and fly ash, mixing and stirring to prepare a curing agent component; S4: weighing a polycarboxylic acid water reducer, a sodium sulfate early strength agent and a sodium gluconate retarder to prepare an admixture component; S5: Mix and stir the prepared qualified soil component, curing agent component and admixture component, add water and stir to prepare premixed fluidized solidified soil.
7. According to the method for optimizing the mix ratio of fluidized solidified soil as described in claim 6, the amount of water added is 40 to 70% of the total mass of dry soil in the soil component, the solidifying agent component and the admixture component.
8. The method for optimizing the mix ratio of fluidized solidified soil according to claim 7, wherein the added water is clean fresh water.
9. Use of the fluidized solidified soil described in claim 1 in backfilling of construction projects.