NL2031019B1 - Composite curing agent for deep stirring of soft soil foundations with high moisture content, and preparation method thereof - Google Patents
Composite curing agent for deep stirring of soft soil foundations with high moisture content, and preparation method thereof Download PDFInfo
- Publication number
- NL2031019B1 NL2031019B1 NL2031019A NL2031019A NL2031019B1 NL 2031019 B1 NL2031019 B1 NL 2031019B1 NL 2031019 A NL2031019 A NL 2031019A NL 2031019 A NL2031019 A NL 2031019A NL 2031019 B1 NL2031019 B1 NL 2031019B1
- Authority
- NL
- Netherlands
- Prior art keywords
- curing agent
- stirring
- composite curing
- moisture content
- soft soil
- Prior art date
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00146—Sprayable or pumpable mixtures
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00732—Uses not provided for elsewhere in C04B2111/00 for soil stabilisation
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
- E02D3/126—Consolidating by placing solidifying or pore-filling substances in the soil and mixing by rotating blades
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Inorganic Chemistry (AREA)
- Agronomy & Crop Science (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The present disclosure belongs to the technical field of construction, specifically relates to a composite curing agent for deep stirring of soft soil foundations with high moisture content, and further discloses a preparation method thereof. The composite curing agent 5 of the present disclosure for deep stirring of soft soil foundations with high moisture content takes Portland cement, fly ash, gypsum, polyvinyl alcohol fibers and water reducer as effective components, and can be used for reinforcing soft soil layers with high moisture content, large void, and low permeability, so as to reduce production costs while significantly enhance strength of cement soil and bearing capacity of foundations. 10 The raw materials of the composite curing agent in the present disclosure are widely available and inexpensive, and thus can effectively reduce material costs.
Description
COMPOSITE CURING AGENT FOR DEEP STIRRING OF SOFT SOIL
FOUNDATIONS WITH HIGH MOISTURE CONTENT, AND
PREPARATION METHOD THEREOF
The present disclosure relates to the technical field of construction, in particular to a composite curing agent for deep stirring of soft soil foundations with high moisture content, and further discloses a preparation method thereof.
Covering a vast area, China has soft soil layers formed by various origins, and the soft soil layers have the characteristics of wide distribution and thick soil layer. Soft soils of this kind have high moisture content, large void ratio, low shear strength, high compressibility, poor permeability, and long time for settlement and stabilization.
Following the rapid development of highway project constructions in recent years, highway bridge constructions are often needed on soft soil foundations. However, due to poor building performances, stresses need to be put on soft soil foundations, particularly on muck or mucky soil in a fluid plastic state, and manual consolidation is inevitable. As for soft soil foundations of this kind, processing methods that are commonly used at present include: a drainage consolidation method, a substitution method, a pile foundation method, a soft soil curing method and so on.
The drainage consolidation method shortens drainage path of foundation soil by providing drainage channels inside of the soil body, and accelerates drainage consolidation rate of the soil body by means of dead weight or preload, thereby increasing strength of foundation soil. This method is widely used in projects, and is an economic and efficient foundation processing method for deep soft soil foundation, which has been well tested in both theory and practice. However, due to its long processing period and large settlement, the drainage consolidation method is unfavorable for deformation control.
The substitution method forms a double-layer or composite foundation by replacing part or all of the soft soil body in a soft foundation with geotechnical materials having good physical and mechanical properties, such as sand and stone materials, thereby improving foundation bearing capacity and reducing settlement. However, this method generally requires a large amount of sand and stone materials.
The pile foundation method makes full use of bearing capacity of soil between piles and transfers part of load to the deep foundation by providing piles in the foundation, thereby enhancing the overall bearing capacity of the foundation. However, pile construction generally needs a vibratory immersed tube pile driver, which leads to certain vibration and noise pollution, and is hard to penetrate thick sand and hard soil layers.
The soft soil curing method adopts a special stirring apparatus so as to form indurations after full stirring of soft foundation muck and curing agent, thereby significantly enhancing strength parameters of cured soil body. In recent years, a deep stirring method, as a method for reinforcing deep soft soil, is widely promoted and applied because of its low project cost, simple operations, non-pollution, speediness and other advantages. This method mainly uses cement as the curing agent, and forcedly mixes the soft soil and the curing agent deep in the foundation by using a specially-made stirring machine, so that the cement and soil are compacted and hardened so as to form a cement-reinforced soil pile having certain strength, thereby enhancing strength and deformation modulus of foundation soil. However, the reinforcement effect of this method is poor for soft soil layers with high moisture content, large void ratio, and low permeability, and can seldom satisfy requirements of bearing capacity.
As a result, a more powerful curing agent needs to be added into the cement soil, so as to further enhance strength of cement soil and bearing capacity of foundation; at the same time, it is also expected that part of cement can be replaced while strength of cement soil is enhanced, so as to effectively reduce production costs.
Therefore, the technical problem to be solved by the present disclosure is to provide a composite curing agent for deep stirring of soft soil foundations with high moisture content, wherein the composite curing agent has the advantages of simple preparation, convenient construction and excellent applicability; moreover, the composite curing agent has good mechanical properties, and is effective for reinforcing soft soil layers with high moisture content; and the other technical problem to be solved by the present disclosure is to provide a preparation method and application of the afore-mentioned composite curing agent.
To solve the above technical problems, the composite curing agent of the present disclosure for deep stirring of soft soil foundations with high moisture content comprises components (part by weight) as follows:
Portland cement 12 to 15 parts by weight; fly ash 10 to 15 parts by weight; gypsum 4 to 6 parts by weight; polyvinyl alcohol fibers 1 to 2 parts by weight; water reducer 0.2 to 0.3 parts by weight; and deionized water 7 to 9 parts by weight.
Specifically, the Portland cement includes ordinary Portland cement at P042.5 level.
Specifically, the fly ash includes fly ash of F class.
Specifically, the water reducer includes lignin.
The present disclosure further discloses a preparation method of the composite curing agent, including steps of: (1) taking a selected quantity of the deionized water, and mixing it with the Portland cement before full stirring, so that hydration reaction occurs and a large amount of calcium hydroxide is produced, thereby creating an alkaline environment; (2) continuing adding a selected quantity of the fly ash before full stirring, so that pozzolanic reaction occurs by using activity of hydration products, thereby further filling voids of cement soil; (3) continuing adding a selected quantity of the gypsum before full stirring, so as to consuming calcium aluminate left in the cement, thereby producing a large amount of calcium sulfoaluminate hydrates, which precipitate as acicular crystals; and (4) continuing adding a selected quantity of the lignin and polyvinyl alcohol fibers before full stirring, thereby obtaining the composite curing agent.
Specifically, a temperature in the stirring of Step (1) is above 10°C.
The present disclosure further discloses an application of the composite curing agent for deep stirring of soft soil foundations with high moisture content in the field of soft soll layer curing construction.
The present disclosure further discloses a method of soft soil layer curing construction, including: steps of obtaining the composite curing agent following the method, as well as a step of, by using a deep stirring machine, immediately jetting the composite curing agent into the soft soil layer, and fully stirring and mixing.
Specifically, a jetting dosage of the composite curing agent is 122.8 to 163.8 kg/m.
Specifically, the deep stirring machine includes a cement stirring pile machine or a high-pressure rotary jetting pile machine.
The composite curing agent of the present disclosure for deep stirring of soft soil foundations with high moisture content takes Portland cement, fly ash, gypsum, polyvinyl alcohol fibers and water reducer as effective components, and can be used for reinforcing soft soil layers with high moisture content, large voids, and low permeability, so as to reduce production costs while significantly enhance strength of cement soil and bearing capacity of foundations. Raw materials of the composite curing agent in the present disclosure are widely available and inexpensive, and thus can effectively reduce material costs; moreover, the curing agent can be simply formed by fully mixing the raw materials in sequence, and thus has the advantages of simple preparation and easy operation.
The reinforcing mechanism of the composite curing agent of the present disclosure for deep stirring of soft soil foundations with high moisture content is as follows: in the curing agent, Portland cement serves as a key component, and hydration and gelatinization occur between the Portland cement and foundation soil, thereby gradually forming a continuous set cement frame around soil particles; meanwhile, ion exchange occurs between a small part of the large amount of calcium hydroxide generated during hydration of cement and a small amount of calcium ions on surface of soil particles, thereby generating a stable calcium clay, which enhances structural strength of reinforced soil; in the curing agent, the added fly ash can replace part of cement, which reduces cement content, and pozzolanic hydration takes places in the alkaline environment of cement soil; moreover, a stable fibrous crystalline compound is generated after hydrolysis and hydration retro-coagulation reaction, continuously grows and extends to form a spatial network, and is tightly wound and bonded together, thereby forming a pile body with comparatively large strength, which further fills voids in cement soil; in the curing agent, the added gypsum can react with calcium aluminate in cement to generate a large amount of calcium sulfoaluminate hydrates, which precipitate as acicular crystals; the crystals stagger and continuously expand so that the structure of cement soil is continuously compacted, the strength increases, and the bearing capacity is enhanced; specific reaction formula is as follows: 3Ca0 A1203+3Ca504:2H20+26H20=3Ca0:AI203:3CaS04:32H20; in the curing agent, the addition of polyvinyl alcohol fibers makes moisture migration difficult, so that the capillary tension caused by capillary water loss contraction is reduced to some extent, thereby increasing the plastic tensile energy of piles to resist cracking; and in the curing agent, the lignin serves as a water reducer, and can release water from flocculent structure while reducing water-cement ratio and saving cement content, so as to prevent the flocculent structure from packaging the deionized water, which may result 5 inthe failure of providing a lot of water for cement hydration, thereby enhancing strength and compactness of reinforced soil body.
To make the technical problem to be solved, the technical solution, and advantages of the present disclosure clearer, details will be given with reference to specific embodiments.
In the following embodiments of the present disclosure, unless otherwise specified, all materials used are commercially available.
Embodiment 1
In this embodiment, a mono-axial cement stirring pile machine is used in the soft foundation processing construction of cement stirring pile with a pile diameter of D800 and a pile length of 25 m.
The preparation method in this embodiment of the composite curing agent for deep stirring of soft soil foundations with high moisture content includes steps of: (1) preparing 2457.5 kg of ordinary Portland cement at PO42.5 level, 2047.5 kg of fly ash of F class, 820 kg of gypsum, 205 kg of polyvinyl alcohol fibers, 40 kg of lignin, and 1842.5 kg of deionized water for use later; (2) taking 2457.5 kg of ordinary Portland cement at P042.5 level, and placing it, together with 1842.5 kg of deionized water, into a slurry stirring tank for full mixing of 5 min at a temperature above 10°C; (3) continuing adding to the stirring tank 2047.5 kg of fly ash of F class for full mixing of 3 min; (4) continuing adding to the stirring tank 820 kg of gypsum for full mixing of 3 min; and (5) continuing adding to the slurry stirring tank both 205 kg of polyvinyl alcohol fibers and kg of lignin for full mixing of 1 min, thereby obtaining the needed composite curing agent.
Start a cement stirring pile machine, jet a composite curing agent at a constant speed according to a dosage of 296.5 kg/m, and fully stir it with the foundation soil before concretion. The addition of the composite curing agent improves the liquid phase environment and thickness of the cement soil, and enhances strength and characteristics of cement soil, so that the cement soil can be better mixed with the foundation soil to result in hydrolysis and hydration reaction, thereby forming cement soil piles with integrality, water stability and high strength, which can significantly enhance bearing capacity and stability of the foundation; the composite curing agent is low in cost, and can be flexibly used in construction, so it can shorten the construction period and reduce cost, and can make the reinforcement more economical and scientific.
Embodiment 2
In this embodiment, the composite curing agent for deep stirring of soft soil foundations with high moisture content comprises the following components: 1200 kg of Portland cement, 1500 kg of fly ash, 400 kg of gypsum, 200 kg of polyvinyl alcohol fibers, 20 kg of lignin, and 900 kg of deionized water.
In this embodiment, the preparation method and the application method of the composite curing agent for deep stirring of soft soil foundations with high moisture content are the same as those in Embodiment 1.
Embodiment 3
In this embodiment, the composite curing agent for deep stirring of soft soil foundations with high moisture content comprises the following components: 1500 kg of Portland cement, 1000 kg of fly ash, 600 kg of gypsum, 100 kg of polyvinyl alcohol fibers, 30 kg of lignin, and 700 kg of deionized water.
In this embodiment, the preparation method and the application method of the composite curing agent for deep stirring of soft soil foundations with high moisture content are the same as those in Embodiment 1.
Embodiment 4
In this embodiment, the composite curing agent for deep stirring of soft soil foundations with high moisture content comprises the following components: 1725 kg of Portland cement, 1150 kg of fly ash, 690 kg of gypsum, 115 kg of polyvinyl alcohol fibers, 34.5 kg of lignin, and 805 kg of deionized water.
In this embodiment, the preparation method and the application method of the composite curing agent for deep stirring of soft soil foundations with high moisture content are the same as those in Embodiment 1.
Contrast Embodiment 1
In this contrast embodiment, the preparation method and raw material composition of the composite curing agent are the same as those in Embodiment 1, and the only difference is the absence of the fly ash.
When the curing agent in this contrast embodiment is applied to the working conditions of Embodiment 1, it is found in practice that the unit weight of pile cement soil is reduced, and the 28d unconfined compressive strength is slightly reduced, wherein, relative to the solution of Reference 1, the reduction amplitude is about 3% to 5%, and the unit weight of the pile cement soil is reduced by 1.3% to 2.5%.
Contrast Embodiment 2
In this contrast embodiment, the preparation method and raw material composition of the composite curing agent are the same as those in Embodiment 1, and the only difference is the absence of the polyvinyl alcohol fibers.
When the curing agent in this contrast embodiment is applied to the working conditions of Embodiment 1, it is found in practice that the integrality of pile body is slightly reduced, and the 28d unconfined compressive strength is slightly reduced, wherein, relative to the solution of Reference 1, the reduction amplitude is about 1% to 1.5%, and the integrality of the pile body is slightly reduced but is unnoticeable.
Contrast Embodiment 3
In this contrast embodiment, the preparation method and raw material composition of the composite curing agent are the same as those in Embodiment 1, and the only difference is the absence of the lignin.
When the curing agent in this contrast embodiment is applied to the working conditions of Embodiment 1, it is found in practice that, since the lignin is not added, the thickness of the cement slurry is reduced, which greatly reduces the initial set and final set of cement soil, and the 28d unconfined compressive strength of the pile body cement soil is significantly reduced, wherein, relative to Reference 1, the reduction amplitude is about 10% to 18%, the initial set time of cement soil is reduced by 0.8 to 1.2 h, and the final set time is reduced by 1.1 to 1.5 h.
Contrast Embodiment 4
In this contrast embodiment, the preparation method and raw material composition of the composite curing agent are the same as those in Embodiment 1, and the only difference is the absence of the gypsum.
When the curing agent in this contrast embodiment is applied to the working conditions of Embodiment 1, it is found in practice that the integrality of pile body is slightly reduced, and the 28d unconfined compressive strength is slightly reduced, wherein, relative to the solution of Reference 1, the reduction amplitude is about 2% to 4%, and the integrality of the pile body is slightly reduced but is unnoticeable.
Apparently, the above embodiments are merely examples for making the illustration clearer, rather than limits to the embodiments. For ordinary technicians in this field, variations or changes in other forms can also be made based on the above-mentioned illustration. It is unnecessary or impossible to list all of the embodiments here. Other obvious variations or changes derived thereby are also in the scope of protection contained in the present disclosure.
Translation of the claims for the search 1. Acomposite curing agent for deep stirring of soft soil foundations with high moisture content, comprising components (part by weight) as follows:
Portland cement 12 to 15 parts by weight; fly ash 10 to 15 parts by weight; gypsum 4 to 6 parts by weight; polyvinyl alcohol fibers 1 to 2 parts by weight; water reducer 0.2 to 0.3 parts by weight; and deionized water 7 to 9 parts by weight. 2. The composite curing agent for deep stirring of soft soil foundations with high moisture content according to claim 1, wherein the Portland cement includes ordinary Portland cement at P042.5 level. 3. The composite curing agent for deep stirring of soft soil foundations with high moisture content according to claim 1 or 2, wherein the fly ash includes fly ash of F class. 4. The composite curing agent for deep stirring of soft soil foundations with high moisture content according to any one of claims 1 to 3, wherein the water reducer includes lignin. 5. A preparation method of the composite curing agent according to any one of claims 1 to 4, including steps of: (1) taking a selected quantity of the deionized water, and mixing it with the Portland cement before full stirring, so that hydration reaction occurs and a large amount of calcium hydroxide is produced, thereby creating an alkaline environment; (2) continuing adding a selected quantity of the fly ash before full stirring, so that pozzolanic reaction occurs by using activity of hydration products, thereby further filling voids of cement soil; (3) continuing adding a selected quantity of the gypsum before full stirring, so as to consuming calcium aluminate left in the cement, thereby producing a large amount of calcium sulfoaluminate hydrates, which precipitate as acicular crystals; and (4) continuing adding a selected quantity of the lignin and polyvinyl alcohol fibers before full stirring, thereby obtaining the composite curing agent. 6. The preparation method of the composite curing agent according to claim 5, wherein a temperature in the stirring of Step (1) is above 10°C. 7. Application of the composite curing agent for deep stirring of soft soil foundations with high moisture content according to any one of claims 1 to 4 in the field of soft soil layer curing construction. 8. A method of soft soil layer curing construction, including: steps of obtaining the composite curing agent following the method according to claim 5 or 6, as well as a step of, by using a deep stirring machine, immediately jetting the composite curing agent into the soft soil layer, and fully stirring and mixing. 9. The method of soft sail layer curing construction according to claim 8, wherein a jetting dosage of the composite curing agent is 122.8 to 163.8 kg/m. 10. The method of soft soil layer curing construction according to claim 8 or 9, wherein the deep stirring machine includes a cement stirring pile machine or a high-pressure rotary jetting pile machine.
Claims (10)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210027481.XA CN114292080A (en) | 2022-01-11 | 2022-01-11 | Composite curing agent for deep stirring of high-water-content soft soil foundation and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| NL2031019A NL2031019A (en) | 2023-07-13 |
| NL2031019B1 true NL2031019B1 (en) | 2024-01-19 |
Family
ID=80977580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL2031019A NL2031019B1 (en) | 2022-01-11 | 2022-02-21 | Composite curing agent for deep stirring of soft soil foundations with high moisture content, and preparation method thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN114292080A (en) |
| NL (1) | NL2031019B1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117303844A (en) * | 2023-09-20 | 2023-12-29 | 深圳宏垚环保科技有限公司 | Fiber reinforced composite curing agent preparation method |
| CN117756491A (en) * | 2023-12-22 | 2024-03-26 | 广东电网有限责任公司 | An environmentally friendly curing agent for curing soft soil and its preparation method and application |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001207439A (en) * | 2000-01-24 | 2001-08-03 | Kokudo Sogo Kensetsu Kk | Soil impoving method |
| CN102021906A (en) * | 2010-12-16 | 2011-04-20 | 河南省新开元路桥工程咨询有限公司 | Method for reinforcing soft soil foundation at deep mixing pile |
| CN102517031A (en) * | 2011-11-08 | 2012-06-27 | 宁波大学 | Novel mucky soil composite curing agent |
| CN107630451A (en) * | 2017-08-01 | 2018-01-26 | 兰州交通大学 | A kind of Soil-cement saturation loess composite foundation reinforcing method |
| CN107673722A (en) * | 2017-08-15 | 2018-02-09 | 南京航空航天大学 | A kind of cement base composite curing agent |
| CN111348872A (en) * | 2020-02-17 | 2020-06-30 | 常州工学院 | High-strength cement-based slurry, preparation method thereof and construction method of mixing pile |
| CN113135730B (en) * | 2021-05-17 | 2022-12-09 | 浙江久豪建筑勘测设计有限公司 | Curing agent and curing process applied to soft soil foundation |
-
2022
- 2022-01-11 CN CN202210027481.XA patent/CN114292080A/en active Pending
- 2022-02-21 NL NL2031019A patent/NL2031019B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| CN114292080A (en) | 2022-04-08 |
| NL2031019A (en) | 2023-07-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Chica et al. | Cellular concrete review: New trends for application in construction | |
| CN1182065C (en) | Fast anchor type inorganic viscose grouting matenial and its preparing process | |
| CN106007550B (en) | A kind of big fluidised form ungauged regions anti-crack concrete grouting material | |
| CA2871595C (en) | Foamed cement compositions containing metal silicides usable in subterranean well operations | |
| US20200369567A1 (en) | Cement composition and hardened body of the same | |
| NL2031019B1 (en) | Composite curing agent for deep stirring of soft soil foundations with high moisture content, and preparation method thereof | |
| EP0241554B1 (en) | Process for producing mortar and method for applying the same | |
| CN107459301A (en) | A kind of premixing fluidised form solidified earth | |
| CN111676987A (en) | Construction method of backfilling of fertilizer trough by vibrating and ramming method | |
| KR102457167B1 (en) | Eco friendly injection for ground reinforcement grout composition and construction method using the same | |
| CN112299797A (en) | Impervious reinforced grouting material for fractured rock mass under flowing water condition and slurry production method | |
| CN114773005A (en) | Basalt fiber reinforced solidified cement soil and preparation method thereof | |
| CN110922128A (en) | Composite curing agent for peat soil, method of use and reinforcement method based thereon | |
| KR102626820B1 (en) | Ultra high strength shotcrete composition and construction method using the same | |
| CN116240921B (en) | Waterproof construction method for underground structure bottom plate | |
| CN114315294B (en) | Low-strength tough waterproof concrete for underground engineering and preparation method thereof | |
| CN104649629A (en) | Asbestos fiber, cement and pulverized fuel ash slurry and method for reinforcing soft soil with high water content, high plasticity indexes, high organic matter content and high structural performance by using asbestos fiber | |
| Cao et al. | In-situ coating technique for rebar installation for 3D-printed reinforced concrete | |
| CN109678434A (en) | A kind of high flexibility concrete support reinforcement material and preparation method thereof | |
| Krishna Kumar et al. | Comprehensive Review on Foamed Concrete and its Utilization in Contemporary Construction Technology | |
| CN115288473A (en) | A kind of brick column polymer mortar and clad steel reinforcement method | |
| CN115162323A (en) | A kind of high-strength expanded body pile of basalt composite bar surrounding hoop reinforced concrete prefabricated pile and its construction method | |
| CN114032887A (en) | Grouting reinforcement material for in-service pile foundation of weak stratum and grouting process thereof | |
| Teng et al. | A novel method for testing the supporting performance of thin spray-on liner and metal mesh on sandstone | |
| CN113235584A (en) | Composite pile foundation construction method for high-rise building |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MM | Lapsed because of non-payment of the annual fee |
Effective date: 20250301 |