CN114262195A - Anti-dispersion fiber bentonite dynamic water grouting material and preparation method thereof - Google Patents
Anti-dispersion fiber bentonite dynamic water grouting material and preparation method thereof Download PDFInfo
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- CN114262195A CN114262195A CN202210050665.8A CN202210050665A CN114262195A CN 114262195 A CN114262195 A CN 114262195A CN 202210050665 A CN202210050665 A CN 202210050665A CN 114262195 A CN114262195 A CN 114262195A
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- bentonite
- fiber
- cement
- slurry
- grouting material
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- 239000000835 fiber Substances 0.000 title claims abstract description 58
- 239000000440 bentonite Substances 0.000 title claims abstract description 48
- 229910000278 bentonite Inorganic materials 0.000 title claims abstract description 48
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 title claims abstract description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 239000006185 dispersion Substances 0.000 title claims abstract description 23
- 239000000463 material Substances 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 title abstract description 10
- 239000002002 slurry Substances 0.000 claims abstract description 45
- -1 polypropylene Polymers 0.000 claims abstract description 34
- 239000004743 Polypropylene Substances 0.000 claims abstract description 32
- 229920001155 polypropylene Polymers 0.000 claims abstract description 32
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 22
- 239000004568 cement Substances 0.000 claims abstract description 19
- 238000003756 stirring Methods 0.000 claims abstract description 14
- 229940092782 bentonite Drugs 0.000 claims description 41
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 11
- 239000011398 Portland cement Substances 0.000 claims description 4
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 4
- 239000000292 calcium oxide Substances 0.000 claims description 4
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- GRLPQNLYRHEGIJ-UHFFFAOYSA-J potassium aluminium sulfate Chemical compound [Al+3].[K+].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O GRLPQNLYRHEGIJ-UHFFFAOYSA-J 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- 235000012239 silicon dioxide Nutrition 0.000 claims description 4
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims description 3
- 229910052901 montmorillonite Inorganic materials 0.000 claims description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 2
- ONCZQWJXONKSMM-UHFFFAOYSA-N dialuminum;disodium;oxygen(2-);silicon(4+);hydrate Chemical group O.[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Na+].[Na+].[Al+3].[Al+3].[Si+4].[Si+4].[Si+4].[Si+4] ONCZQWJXONKSMM-UHFFFAOYSA-N 0.000 claims description 2
- 229910052744 lithium Inorganic materials 0.000 claims description 2
- 229940080314 sodium bentonite Drugs 0.000 claims description 2
- 229910000280 sodium bentonite Inorganic materials 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 7
- 230000003014 reinforcing effect Effects 0.000 abstract description 6
- 230000002787 reinforcement Effects 0.000 abstract description 3
- 239000012895 dilution Substances 0.000 abstract description 2
- 238000010790 dilution Methods 0.000 abstract description 2
- 239000002131 composite material Substances 0.000 abstract 1
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000006703 hydration reaction Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000003487 anti-permeability effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910001653 ettringite Inorganic materials 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000009828 non-uniform distribution Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229910001414 potassium ion Inorganic materials 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000004642 transportation engineering Methods 0.000 description 1
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
An anti-dispersion fiber bentonite dynamic water grouting material and a preparation method thereof belong to the technical field of grouting, leaking stoppage and reinforcement in civil engineering. The cement-based composite material consists of bentonite, water, cement, an auxiliary agent and polypropylene fiber according to the weight ratio. The preparation method comprises the following steps: preparing bentonite slurry and stirring uniformly, scattering polypropylene fiber into the bentonite slurry and stirring, preparing and adding the auxiliary agent, and adding cement. According to the characteristics of the flowing water grouting, a proper amount of polypropylene fiber is added on the basis of the traditional reinforcing slurry, so that the bentonite fiber curing slurry which is excellent in underwater stability, anti-dilution, high in underwater strength and good in durability in a flowing water environment is formed, and the bentonite fiber curing slurry can be widely applied to the seepage-proofing, leakage-stopping and grouting construction of flowing water areas such as reservoir dams and karsts and the like, and provides guarantee for engineering construction and development in various flowing water environments.
Description
Technical Field
The invention relates to an anti-dispersion fiber bentonite flowing water grouting material and a preparation method thereof, belonging to the technical field of grouting, leaking stoppage and reinforcement in civil engineering.
Background
With the development of society, the construction scale of the transportation engineering in China shows a growing situation, so that the geological conditions faced by various engineering constructions are increasingly complex, and the engineering safety is seriously threatened by geological disasters such as settlement deformation, sand flow, piping, undermining and the like. Engineering practices show that grouting is an efficient technical means for dealing with geological disasters and disease treatment in engineering, and has the effects of reinforcing a rock-soil body structure, plugging a hydraulic channel and the like. The reinforcement of the structure under the condition of flowing water is a great test for grouting, and is always a widely concerned engineering problem in grouting engineering.
A large amount of soil reinforcing slurry is widely applied to the fields of buildings and roads in China, however, the reinforcing slurry for dynamic water grouting is not common. Under the condition of flowing water, the slurry is difficult to simultaneously meet the construction requirements of good pumpability, water dispersion resistance, controllable setting time, high consolidation strength and the like, and the existence of various mineral substances in water can influence the stability and durability of the traditional reinforced slurry, so that the reinforcing effect is not ideal.
Disclosure of Invention
In order to solve the problems in the background technology, the invention provides an anti-dispersion fiber bentonite flowing water grouting material and a preparation method thereof.
The invention adopts the following technical scheme: the anti-dispersion fiber bentonite dynamic water grouting material consists of 24-36 wt% of bentonite, 36-54 wt% of water, 11-15 wt% of cement, 8-12 wt% of an auxiliary agent and 1-3 wt% of polypropylene fiber.
The invention discloses a preparation method of a dispersion-resistant fiber bentonite dynamic water grouting material, which comprises the following steps:
s1: preparing bentonite slurry, stirring uniformly,
s2: scattering polypropylene fibers into the bentonite slurry, and stirring until the polypropylene fibers are not agglomerated into bundles;
s3: preparing an auxiliary agent;
s4: adding an auxiliary agent;
s5: adding cement.
Compared with the prior art, the invention has the beneficial effects that:
1. aiming at the characteristics of moving water grouting, a proper amount of polypropylene fiber is added on the basis of the traditional reinforcing slurry, so that the bentonite fiber curing slurry which has excellent underwater stability, dilution resistance, high underwater strength and good durability in a moving water environment is formed, and the bentonite fiber curing slurry can be widely applied to the seepage-proofing, leakage-stopping and grouting construction of moving water areas such as reservoir dams, karsts and the like, and provides guarantee for engineering construction and development in various moving water environments;
2. the pozzolan cement or pozzolan portland cement selected by the invention mainly contains active silicon oxide and active aluminum oxide, and free sodium ions and potassium ions, active silicon oxide and aluminum oxide can generate new polymers under the condition of seawater, so that a slurry combination has good water stability and high underwater strength;
3. the specific bentonite replaces the traditional on-site clay, so that the water absorption and the expansibility of the slurry are stably controlled, and the performance of a reinforced body reinforced by the slurry is more stable and controllable;
4. the polypropylene fiber is added, so that the toughness of the aggregate is improved, the fluidity of the slurry is improved, and the deformation resistance of the aggregate is improved, so that the aggregate has certain toughness and impact resistance. The polypropylene fiber has higher toughness and strength, is not easy to be crossed and agglomerated in slurry stirring, and is formed into a net structure by stirring the polypropylene fiber to be mutually crossed and linked, so that the slurry has strong seawater scouring resistance and is not easy to run off in water. In consideration of the pumpability of the grouting, the content of the polypropylene fiber needs to be controlled not to be too high to prevent the blockage of the grouting device.
5. The addition of the auxiliary agent can change the setting time of the slurry and improve the fluidity and the expansion performance of the slurry. So that the slurry is quickly solidified, and the slurry loss caused by the flowing water scouring is reduced.
Detailed Description
The technical solutions in the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the invention, rather than all embodiments, and all other embodiments obtained by those skilled in the art without any creative work based on the embodiments of the present invention belong to the protection scope of the present invention.
The anti-dispersion fiber bentonite dynamic water grouting material consists of 24-36 wt% of bentonite, 36-54 wt% of water, 11-15 wt% of cement, 8-12 wt% of an auxiliary agent and 1-3 wt% of polypropylene fiber.
The bentonite is sodium bentonite or lithium bentonite, the content of montmorillonite is not less than 70%, the montmorillonite particles are fine and about 0.2-1 mu m, and the colloid dispersion suspension characteristic and the water absorption expansion characteristic can increase the viscosity of the solidified slurry and improve the water dispersion resistance.
The cement is pozzolana cement or pozzolana portland cement. The fineness of the cement meets the condition that the residue of a square-hole sieve with 80 mu m is less than 10 percent or the residue of the square-hole sieve with 45 mu m is not more than 30 percent.
The auxiliary agent consists of 10-30 wt% of silicon dioxide, 10-40 wt% of calcium oxide, 5-45 wt% of potassium aluminum sulfate and 15-35 wt% of sodium hydroxide. The specific surface area of the auxiliary agent is not less than 350m2/kg。
On one hand, the auxiliary agent is an alkaline substance, which can destroy the layered mineral structure of the bentonite, so that the bentonite fully participates in hydration reaction, and the slurry performance is improved; on the other hand, the auxiliary agent can provide sulfate ions, calcium ions, aluminum ions and silicon ions, and can react to generate hydration products such as hydrated calcium silicate, ettringite and the like, thereby reducing the gelling time of the slurry and improving the strength and the expansion performance.
The polypropylene fiber is a monofilament bundle-shaped polypropylene fiber, has extremely stable chemical properties due to the inherent characteristics of strong acid resistance, strong alkali resistance, weak heat conductivity and the like, and belongs to a chemically inert material. The additive can effectively control the cracks of the reinforced body caused by factors such as temperature and the like in the initial reaction stage of the slurry by adding into the slurry, prevent and inhibit the formation and development of the cracks, and improve the impermeability, impact resistance and shock resistance of the reinforced body. The equivalent diameter of the monofilament bundle-shaped polypropylene fiber is 18-30 mu m, and the length of the monofilament bundle-shaped polypropylene fiber is less than 6 mm.
The invention discloses a preparation method of a dispersion-resistant fiber bentonite dynamic water grouting material, which comprises the following steps:
s1: weighing raw materials according to the mass percentage, preparing bentonite into bentonite slurry, uniformly stirring,
s2: then the polypropylene fiber is evenly scattered into the bentonite slurry and stirred until the polypropylene fiber is not agglomerated into bundles. The dosage of the monofilament-shaped polypropylene fiber is strictly controlled, and the polypropylene fiber is slowly and uniformly sprinkled into the slurry during the stirring process, so that the excessive or nonuniform distribution of the polypropylene fiber in the slurry is avoided, and the inconvenience caused by later grouting is prevented.
S3: preparing corresponding auxiliary agents according to the existing slurry quality, and determining the dosage of each content in the auxiliary agents.
S4: adding an auxiliary agent to the solution: silicon dioxide, calcium oxide, potassium aluminum sulfate and sodium hydroxide. And stirred uniformly.
S5: adding cement. It should be noted that the whole preparation process avoids the problems of fiber conglobation and bundling, uneven stirring and the like.
Example 1:
an anti-dispersion fiber bentonite dynamic water grouting material comprises the following components in percentage by mass: weighing raw materials of bentonite (33%), water (40%), cement (15%), an auxiliary agent (10%) and polypropylene fiber (2%), wherein the auxiliary agent comprises the following components in percentage by weight: silicon dioxide (20%), calcium oxide (30%), potassium aluminum sulfate (35%), sodium hydroxide (15%).
The preparation process of this example is:
s1: preparing bentonite slurry from bentonite, stirring uniformly,
s2: then evenly scattering the polypropylene fibers into the bentonite slurry, stirring until the polypropylene fibers are not agglomerated into bundles,
s3: and (4) adding an auxiliary agent.
S4: finally, adding the pozzolanic portland cement and uniformly stirring to obtain the anti-dispersion fiber bentonite solidified slurry.
Compared with the traditional curing slurry without fibers, the permeability coefficient of the curing slurry is reduced by 4 orders of magnitude, the compressive strength of the stone body is 5.12MPa (28-day curing), the tensile strength of the splitting is 0.72MPa, and the curing slurry has excellent and reliable performance.
According to the method provided by the invention, the water absorption of the slurry is good, and the existence of the polypropylene fiber enables the fluidity of the slurry to be controllable. The reinforced body formed after the slurry is cured has good expansion performance, remarkable anti-permeability performance and remarkably improved shearing resistance and crack resistance.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (9)
1. The anti-dispersion fiber bentonite dynamic water grouting material is characterized in that: the cement is composed of 24-36% of bentonite, 36-54% of water, 11-15% of cement, 8-12% of auxiliary agent and 1-3% of polypropylene fiber according to the weight ratio.
2. The anti-dispersion fiber bentonite hydrodynamic grouting material as claimed in claim 1, wherein: the bentonite is sodium bentonite or lithium bentonite, and the content of montmorillonite is not less than 70%.
3. The anti-dispersion fiber bentonite hydrodynamic grouting material as claimed in claim 1 or 2, characterized in that: the cement is pozzolana cement or pozzolana portland cement.
4. The anti-dispersion fiber bentonite hydrodynamic grouting material as claimed in claim 3, wherein: the fineness of the cement meets the condition that the screen residue of a square-hole sieve with the size of 80 mu m is less than 10 percent.
5. The anti-dispersion fiber bentonite hydrodynamic grouting material as claimed in claim 3, wherein: the fineness of the cement meets the condition that the screen residue of a 45-micron square-hole sieve is not more than 30%.
6. The anti-dispersion fiber bentonite hydrodynamic grouting material as claimed in claim 4 or 5, characterized in that: the auxiliary agent consists of 10-30 wt% of silicon dioxide, 10-40 wt% of calcium oxide, 5-45 wt% of potassium aluminum sulfate and 15-35 wt% of sodium hydroxide.
7. The anti-dispersion fiber bentonite hydrodynamic grouting material as claimed in claim 6, wherein: the specific surface area of the auxiliary agent is not less than 350m2/kg。
8. The dispersion-resistant fiber bentonite kinetic water grouting material as claimed in claim 1 or 7, characterized in that: the polypropylene fiber is a monofilament bundle-shaped polypropylene fiber, the equivalent diameter of the monofilament bundle-shaped polypropylene fiber is 18-30 mu m, and the length of the monofilament bundle-shaped polypropylene fiber is less than 6 mm.
9. A method for preparing the dispersion-resistant fiber bentonite hydrodynamic grouting material according to any one of claims 1-8, which is characterized in that: the method comprises the following steps:
s1: preparing bentonite slurry and stirring uniformly;
s2: scattering polypropylene fibers into the bentonite slurry, and stirring until the polypropylene fibers are not agglomerated into bundles;
s3: preparing an auxiliary agent;
s4: adding an auxiliary agent;
s5: adding cement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210050665.8A CN114262195A (en) | 2022-01-17 | 2022-01-17 | Anti-dispersion fiber bentonite dynamic water grouting material and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210050665.8A CN114262195A (en) | 2022-01-17 | 2022-01-17 | Anti-dispersion fiber bentonite dynamic water grouting material and preparation method thereof |
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| CN114262195A true CN114262195A (en) | 2022-04-01 |
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| CN202210050665.8A Pending CN114262195A (en) | 2022-01-17 | 2022-01-17 | Anti-dispersion fiber bentonite dynamic water grouting material and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114716195A (en) * | 2022-05-13 | 2022-07-08 | 中基发展建设工程有限责任公司 | Cement slurry, cement soil mixing pile and application |
| CN116162214A (en) * | 2023-04-26 | 2023-05-26 | 中国地质大学（北京） | Grouting material and application thereof |
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| CN105622019A (en) * | 2015-12-31 | 2016-06-01 | 安吉县宇宏粘土化工有限公司 | Modified clay reinforcing paste slurry |
| CN105645869A (en) * | 2015-12-31 | 2016-06-08 | 安吉县宇宏粘土化工有限公司 | Clay reinforcing paste slurry |
| CN106673541A (en) * | 2016-11-29 | 2017-05-17 | 中铁十六局集团北京轨道交通工程建设有限公司 | Grouting material for surge prevention in mylonite crushing zone shield construction and preparation method thereof |
| CN108706949A (en) * | 2018-06-08 | 2018-10-26 | 中国地质大学（北京） | Bentonite base injecting paste material and preparation method thereof |
| CN109020361A (en) * | 2018-07-13 | 2018-12-18 | 山东大学 | A kind of high flow rate big flow blocking in flowing water fiber injecting paste material and preparation method thereof |
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2022
- 2022-01-17 CN CN202210050665.8A patent/CN114262195A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105622019A (en) * | 2015-12-31 | 2016-06-01 | 安吉县宇宏粘土化工有限公司 | Modified clay reinforcing paste slurry |
| CN105645869A (en) * | 2015-12-31 | 2016-06-08 | 安吉县宇宏粘土化工有限公司 | Clay reinforcing paste slurry |
| CN106673541A (en) * | 2016-11-29 | 2017-05-17 | 中铁十六局集团北京轨道交通工程建设有限公司 | Grouting material for surge prevention in mylonite crushing zone shield construction and preparation method thereof |
| CN108706949A (en) * | 2018-06-08 | 2018-10-26 | 中国地质大学（北京） | Bentonite base injecting paste material and preparation method thereof |
| CN109020361A (en) * | 2018-07-13 | 2018-12-18 | 山东大学 | A kind of high flow rate big flow blocking in flowing water fiber injecting paste material and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114716195A (en) * | 2022-05-13 | 2022-07-08 | 中基发展建设工程有限责任公司 | Cement slurry, cement soil mixing pile and application |
| CN116162214A (en) * | 2023-04-26 | 2023-05-26 | 中国地质大学（北京） | Grouting material and application thereof |
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Application publication date: 20220401 |
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