Premixed flow-state solidified soil for backfill soil construction and preparation method of premixed flow-state solidified soil

Abstract

The invention provides premixed flow-state solidified soil for backfill soil construction and a preparation method of the premixed flow-state solidified soil, and relates to the technical field of building backfill construction. The premixed flow-state solidified soil for backfill soil construction comprises the following components in percentage by mass: 65-75% of soil, 5-10% of a curing agent, 5-10% of an admixture, 5-10% of an additive, 5-10% of water and 5-10% of lime. 0.5%-2% of an additive; 1%-7% of an additive; 10%-15% of water; the additive is any one of epoxy resin and ethylene-vinyl acetate copolymer, and the additive comprises polypropylene fiber and acrylic emulsion. The additive is added into the premixed flow-state solidified soil, and the additive is polypropylene fiber and acrylic emulsion, so that the temperature resistance of the premixed flow-state solidified soil is conveniently improved, and the situation that the hot temperature property of the premixed flow-state solidified soil is influenced by the temperature of the external environment and the use strength of the premixed flow-state solidified soil is reduced during backfilling is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of building backfill construction, and specifically to a premixed fluidized solidified soil for backfill soil construction and a preparation method thereof. Background Technique

[0002] Premixed fluidized solidified soil is a new type of building material used in modern engineering technology. It is mainly used in various fields such as backfilling of engineering foundation trenches, foundation reinforcement treatment, and road subgrades. Premixed fluidized solidified soil is formed by mixing the excavated foundation soil or waste soil with a certain proportion of curing agent and water, and through special processes and mechanical stirring, it forms a pumpable fluidity reinforcement material. This material has the characteristics of high early strength and fast hardening, and the mix ratio can be adjusted according to usage requirements to change its strength and fluidity.

[0003] When premixed fluidized solidified soil is in use, it is easily affected by the external temperature. During backfilling, when the external environment temperature is too high or too low, it is easy to cause the thermal stability of the premixed fluidized solidified soil to decline, thereby reducing the strength of the premixed fluidized solidified soil. Summary of the Invention

[0004] (I) Technical Problems to be Solved

[0005] In view of the deficiencies of the prior art, the present invention provides a premixed fluidized solidified soil for backfill soil construction and a preparation method thereof, which solves the problem that the premixed fluidized solidified soil is easily affected by the external temperature and has poor thermal stability.

[0006] (II) Technical Solutions

[0007] To achieve the above objectives, the present invention is realized through the following technical solutions: A premixed fluidized solidified soil for backfill soil construction includes soil, curing agent, admixture, additive, water, and lime, and includes the following components according to mass percentage:

[0008] Soil 65% - 75%; Curing agent 5% - 10%; Admixture 0.5% - 2%; Additive 1% - 7%; Water 10% - 15%; Lime 5% - 10%;

[0009] The admixture is any one of epoxy resin and ethylene vinyl acetate copolymer;

[0010] The additive includes polypropylene fiber and acrylic emulsion, and the percentage of polypropylene fiber and acrylic emulsion in the total mass: polypropylene fiber 0.5% - 2%, acrylic emulsion 0.5% - 5%.

[0011] Preferably, the soil is any one of montmorillonite, kaolin, and illite.

[0012] Preferably, it includes the following components according to mass percentage:

[0013] Soil 65%: curing agent 5%; admixture 0.5%; additive 1%; water 10%; lime 5%;

[0014] The admixture is epoxy resin, and the additives include polypropylene fiber and acrylic emulsion. The percentages of polypropylene fiber and acrylic emulsion in the total mass are: polypropylene fiber 0.5%, acrylic emulsion 0.5%.

[0015] Preferably, soil 68%: curing agent 8%; admixture 1%; additive 4%; water 12%; lime 7%;

[0016] The admixture is ethylene vinyl acetate copolymer, and the additives include polypropylene fiber and acrylic emulsion. The percentages of polypropylene fiber and acrylic emulsion in the total mass are: polypropylene fiber 1%, acrylic emulsion 3%.

[0017] Preferably, soil 75%: curing agent 10%; admixture 2%; additive 7%; water 15%; lime 10%;

[0018] The admixture is ethylene vinyl acetate copolymer, and the additives include polypropylene fiber and acrylic emulsion. The percentages of polypropylene fiber and acrylic emulsion in the total mass are: polypropylene fiber 2%, acrylic emulsion 5%.

[0019] A preparation method of premixed flowable solidified soil for backfill soil construction, comprising the following steps:

[0020] S1. Place soil, water, and lime in a stirrer and mix them;

[0021] S2. Sequentially stir and mix the curing agent, admixture, and additive, and the stirring time is 1 - 2 min;

[0022] S3. Stir and mix the solutions in S1 and S2, and the stirring time is 2 - 5 min;

[0023] S4. Finally, obtain the premixed flowable solidified soil.

[0024] (III) Beneficial effects

[0025] The present invention provides a premixed flowable solidified soil for backfill soil construction and a preparation method thereof. It has the following beneficial effects:

[0026] By setting additives in the premixed flowable solidified soil, and the additives are polypropylene fiber and acrylic emulsion, it is convenient to increase the heat resistance of the premixed flowable solidified soil, avoid the influence of the external environment temperature on the thermal temperature property of the premixed flowable solidified soil during backfill, and reduce the use strength of the premixed flowable solidified soil. Specific embodiments

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0028] Embodiment 1:

[0029] A premixed fluidized solidified soil for backfill construction, comprising soil, curing agent, admixture, additive, water, and lime, and comprising the following components according to mass percentage:

[0030] Soil 65%: Curing agent 5%; Admixture 0.5%; Additive 1%; Water 10%; Lime 5%;

[0031] The admixture is epoxy resin, and the additive comprises polypropylene fiber and acrylic emulsion. The percentage of polypropylene fiber and acrylic emulsion in the total mass: polypropylene fiber 0.5%, acrylic emulsion 0.5%, and the soil selected is montmorillonite.

[0032] A preparation method of a premixed fluidized solidified soil for backfill construction, comprising the following steps:

[0033] S1. Place the soil, water, and lime in a stirrer and mix them;

[0034] S2. Sequentially stir and mix the curing agent, admixture, and additive, and the stirring time is 1 min;

[0035] S3. Stir and mix the solutions in S1 and S2, and the stirring time is 2 min;

[0036] S4. Finally, obtain the premixed fluidized solidified soil.

[0037] Embodiment 2:

[0038] A premixed fluidized solidified soil for backfill construction, comprising soil, curing agent, admixture, additive, water, and lime, and comprising the following components according to mass percentage:

[0039] Soil 68%: Curing agent 8%; Admixture 1%; Additive 4%; Water 12%; Lime 7%;

[0040] The admixture is ethylene vinyl acetate copolymer, and the additive comprises polypropylene fiber and acrylic emulsion. The percentage of polypropylene fiber and acrylic emulsion in the total mass: polypropylene fiber 1%, acrylic emulsion 3%, and the soil selected is kaolin.

[0041] A preparation method of a premixed fluidized solidified soil for backfill construction, comprising the following steps:

[0042] S1. Place soil, water, and lime in a mixer and mix them;

[0043] S2. Sequentially mix the curing agent, admixture, and additive, with a mixing time of 1.5 min;

[0044] S3. Mix the solutions in S1 and S2, with a mixing time of 4 min;

[0045] S4. Finally, obtain the premixed fluidized solidified soil.

[0046] Example 3:

[0047] A premixed fluidized solidified soil for backfill construction, including soil, curing agent, admixture, additive, water, and lime, comprising the following components by mass percentage:

[0048] Soil 75%: Curing agent 10%; Admixture 2%; Additive 7%; Water 15%; Lime 10%;

[0049] The admixture is ethylene vinyl acetate copolymer, and the additive includes polypropylene fiber and acrylic emulsion. The percentages of polypropylene fiber and acrylic emulsion in the total mass are: polypropylene fiber 2%, acrylic emulsion 5%. The soil selected is illite.

[0050] A preparation method of a premixed fluidized solidified soil for backfill construction, comprising the following steps:

[0051] S1. Place soil, water, and lime in a mixer and mix them;

[0052] S2. Sequentially mix the curing agent, admixture, and additive, with a mixing time of 2 min;

[0053] S3. Mix the solutions in S1 and S2, with a mixing time of 5 min;

[0054] S4. Finally, obtain the premixed fluidized solidified soil.

[0055] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill 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 present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A premixed fluidized solidified soil for backfill construction, characterized in that: It includes soil, curing agent, admixture, additive, water, lime, and the following components in terms of mass percentage: Soil 65% - 75%: curing agent 5% - 10%; admixture 0.5% - 2%; additive 1% - 7%; Water 10%-15%; Lime 5%-10%; The admixture is any one of epoxy resin and ethylene vinyl acetate copolymer; The additives include polypropylene fiber and acrylic emulsion, and the percentage of the polypropylene fiber and the acrylic emulsion in the total mass is: 0.5%-2% of the polypropylene fiber and 0.5%-5% of the acrylic emulsion.

2. The premixed fluidized solidified soil for backfill construction according to claim 1, characterized in that: The soil may be any one of montmorillonite, kaolin and illite.

3. The premixed fluidized solidified soil for backfill construction according to claim 1, characterized in that: The following components are included in percentage by mass: Soil 65%: curing agent 5%; admixture 0.5%; additive 1%; Water 10%; Lime 5%; The admixture is epoxy resin, and the additives include polypropylene fiber and acrylic emulsion. The percentage of the polypropylene fiber and the acrylic emulsion in the total mass is: 0.5% of the polypropylene fiber and 0.5% of the acrylic emulsion.

4. The premixed fluidized solidified soil for backfill construction according to claim 1, characterized in that: Soil 68%: curing agent 8%; admixture 1%; additive 4%; water 12%; lime 7%; The admixture is ethylene vinyl acetate copolymer, and the additives include polypropylene fiber and acrylic emulsion. The percentage of the polypropylene fiber and the acrylic emulsion in the total mass is: 1% of the polypropylene fiber and 3% of the acrylic emulsion.

5. The premixed fluidized solidified soil for backfill construction according to claim 1, characterized in that: Soil 75%: curing agent 10%; admixture 2%; additive 7%; Water 15%; Lime 10%; The admixture is ethylene vinyl acetate copolymer, and the additives include polypropylene fiber and acrylic emulsion. The percentage of the polypropylene fiber and the acrylic emulsion in the total mass is: 2% of the polypropylene fiber and 5% of the acrylic emulsion.

6. A method for preparing premixed fluidized solidified soil for backfill construction, characterized in that: The following steps are involved: S1. Place soil, water and lime in a blender and mix; S2, stir and mix the curing agent, admixture and additive in sequence, and the stirring time is 1-2 minutes; S3, stirring and mixing the solutions in S1 and S2 for 2-5 minutes; S4, finally obtain the premixed fluidized solidified soil.