CN112759320B - High-fluidity low-density grouting material for offshore wind power suction pile foundation - Google Patents
High-fluidity low-density grouting material for offshore wind power suction pile foundation Download PDFInfo
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- CN112759320B CN112759320B CN202011517965.XA CN202011517965A CN112759320B CN 112759320 B CN112759320 B CN 112759320B CN 202011517965 A CN202011517965 A CN 202011517965A CN 112759320 B CN112759320 B CN 112759320B
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- Prior art keywords
- grouting material
- wind power
- suction pile
- cement
- offshore wind
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Classifications
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- 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
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- 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
- C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
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- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention provides a high-fluidity low-density grouting material for an offshore wind power suction pile foundation, and belongs to the technical field of grouting materials. Comprises the following components in percentage by weight: and (3) cement: 30-35%, fly ash: 55-65% of mineral powder: 5-10% of water reducer: 0.2 to 0.5 percent; foaming agent: 0.1 to 0.5 percent; anti-dispersant: 0.5 to 1.0 percent. The invention also provides a preparation method and application of the grouting material. The grouting material is prepared by using cement and fly ash as main materials, the grouting material with low density, high fluidity and low bleeding is needed for the offshore wind power suction pile foundation, the aggregate such as quartz sand is not needed, the cement and the fly ash are adopted as cementing materials, the fly ash is used for replacing most of cement, the cost of the grouting material can be obviously reduced, the engineering requirements of high fluidity and low bleeding are realized by adding the additive, and the cementing material can be directly stirred by using seawater according to the characteristics of engineering coastal construction, so that the grouting material has obvious economic and environmental effects.
Description
Technical Field
The invention belongs to the technical field of grouting materials, and particularly relates to a high-fluidity low-density low-strength grouting material for an offshore wind power suction pile foundation, and a preparation method and application thereof.
Background
The suction pile system starts in seventies of the last century and is mainly applied to the foundations of offshore wind power plant wind turbine foundations, oilfield foundation platforms, jacket foundations, submarine pipeline laying start-up, single pile foundations, mooring suction anchors, underwater facilities and the like. The gap of the suction barrel adopts grouting operation, grouting materials slowly enter the gap through a mortar stirrer and a mortar pipeline which is pre-installed on a jacket foundation, and the strength of the grouting materials is mixed according to design requirements, so that the underwater construction requirements are met. The offshore wind power suction pile foundation needs grouting materials with low strength, low density, high fluidity and low bleeding, and has no caking in appearance, the density is 1100-1600kg/m < 3 >, the truncated cone fluidity is more than 200mm after 240min, the bleeding rate is 0% in 24h, and the 28d compressive strength is 0.5-5MPa.
The grouting material for the offshore wind power suction pile foundation is prepared by taking cement and fly ash as main materials and adding additives such as high flow state, micro foaming, bleeding prevention, dispersion resistance, micro expansion, segregation prevention and the like. The water-added and stirred water-mixed asphalt has the properties of high fluidity, less bleeding, no shrinkage, low strength, low density, no pollution to water quality and surrounding environment, and the like.
In the prior art, most grouting materials adopt fresh water to stir concrete with water, and the cost is higher compared with seawater, so that the concrete material can directly replace the common silicate cement concrete by using the salt-containing seawater to directly mix the cementing material with the fresh water, thereby saving fresh water resources in coastal areas and greatly reducing the construction cost. In addition, in order to reduce the density of grouting materials, the grouting materials adopt more light abrasive materials and do not adopt sand as basic materials, so the density is smaller, the cost is low, the proper mixing ratio is selected, the bleeding is extremely less, and the engineering construction requirements are met.
Disclosure of Invention
The invention aims to provide grouting material for a marine wind power suction pile foundation, and a preparation method and application thereof, so that the grouting material is poured into and filled in a suction cylinder gap. The grouting material not only has high fluidity, low bleeding, low density and low strength, but also can be poured into a suction pile at the lower part to meet the construction performance requirement, and can be obtained locally for the construction at sea, and a certain amount of seawater is added into a construction site for uniform stirring. The quality is reliable, the construction cost is reduced, and the method has remarkable economic and environmental benefits.
In order to solve the problems, the invention adopts the technical scheme that the grouting material with low strength, low density, high fluidity and low bleeding is characterized in that: the components are proportioned according to mass fraction as follows:
and (3) cement: 30-35%;
fly ash: 55-65%;
mineral powder: 5-10%;
foaming agent: 0.1 to 0.5 percent;
water reducing agent: 0.2 to 0.5 percent;
anti-dispersant: 0.5 to 1.0 percent.
In the grouting material, the cement bonds the components in the grouting material into a whole, and plays a certain limiting role in the strength of the grouting material in the later period, and the proper increase of the cement dosage also plays a certain role in reducing bleeding and increasing fluidity; the mineral admixture mainly plays roles of replacing part of cement, improving the mechanical property of grouting materials, reducing the strength of grouting materials, and increasing the fluidity and the expansion rate, and when the mixing amount is too high, the bleeding of the grouting materials is increased; the foaming agent has higher surface activity, can effectively reduce the surface tension of liquid, form bubbles, and then form foam by single bubbles, so that the density, strength and fluidity of grouting material can be obviously reduced; the water reducer has the main effects of reducing the water-cement ratio, improving the fluidity, and when the mixing amount is too low, the fluidity is unqualified, and when the mixing amount is too high, the cost is higher and the bleeding is more; the anti-dispersant mainly acts on the anti-dispersion property of grouting materials in water, so that the grouting materials are not easy to separate in water, pollution is reduced, the grouting materials are too separated in water when the mixing amount is too low, the environment is polluted, and the setting time is increased when the mixing amount is too high.
Further, the cement is P.O 42.5.42.5 ordinary Portland cement.
Further, the fly ash is class I fly ash, and the specific surface area is more than or equal to 400m < 2 >/kg.
Furthermore, the mineral admixture is S105 grade superfine mineral powder, and the specific surface area is more than or equal to 3000m < 2 >/kg.
Further, the foaming agent is HT-180 plastic foaming agent.
Furthermore, the water reducer is polycarboxylate water reducer powder, and the water reducing rate is more than or equal to 25%.
The preparation method of the grouting material for the offshore wind power suction pile foundation is characterized by comprising the following steps of: according to the parts by weight, cement, mineral admixture, foaming agent, water reducing agent and sea water are automatically metered by an electronic scale and poured into a stirrer to be stirred for 300s, and then poured into a 1L container after being stirred uniformly.
The application of the grouting material for the offshore wind power suction pile foundation comprises the application of the grouting material in the offshore wind power suction pile foundation.
Compared with the prior art, the grouting material has the remarkable advantages that the grouting material is prepared by taking light abrasive materials such as cement, fly ash and the like as main materials and adding additives such as high flow state, micro foaming, bleeding prevention, dispersion resistance, micro expansion, segregation prevention and the like. The grouting material has the characteristics of high fluidity, low bleeding, no shrinkage, low strength, low density, no toxicity, no harm, no pollution to water quality and surrounding environment, and the like. The seawater mixing method is economical and environment-friendly, has the advantages of reliable quality, low cost, shortened construction period, convenient use and the like in construction, and can be widely applied to the field of offshore wind power suction pile foundations.
According to the technical requirements, after a large number of mixing ratio optimization experiments are carried out, the high-fluidity low-density low-strength grouting material with the optimal mixing ratio is finally obtained, so that smooth inflow into a suction pile foundation is ensured, and the safety and durability of the structure are well ensured due to extremely low bleeding performance. The invention has the outstanding characteristics that the grouting material for the offshore wind power suction pile foundation is prepared by utilizing the seawater, and the grouting material has obvious economic and environmental benefits because the seawater resources for the offshore construction are rich and the grouting material is easy to obtain, and the cost of the grouting material can be obviously reduced.
Detailed Description
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Example 1
The grouting material of the embodiment comprises the following raw materials in percentage by mass: and (3) cement: 43.87%, fly ash: 54.84%, water reducing agent: 0.296%, anti-dispersant: 0.99%.
Example 2
The grouting material for the steel bar sleeve connection of the embodiment comprises the following raw materials in percentage by mass: and (3) cement: 34.06%, fly ash: 58.59 percent of mineral powder: 6.81 percent of water reducing agent: 0.35% of foaming agent: 0.19%, anti-dispersant: 0%.
Example 3
The grouting material for the steel bar sleeve connection of the embodiment comprises the following raw materials in percentage by mass: and (3) cement: 33.81%, fly ash: 58.16%, mineral powder: 6.76%, water reducing agent: 0.28% of foaming agent: 0.18%, anti-dispersant: 0.81%.
According to the embodiment, the grouting material which adopts cement and fly ash as cementing materials can achieve the technical effect equivalent to that of single cement, and the cost is lower than that of the grouting material which adopts cement as the cementing material, so that the grouting material is more economical and environment-friendly; the anti-dispersant effect in the example 1 makes the working performance loss of the grouting material under water less and does not pollute the environment; example 2 has no anti-dispersant and increased water reducing agent, and has enhanced fluidity; example 3 no ore fines, increased water usage was required, which reduced flowability, but reduced bleeding.
According to the invention, aggregates such as quartz sand are not needed, so that the strength is reduced; fresh water is not needed by stirring the seawater, engineering requirements can be met, and most of cement is replaced by the fly ash, so that the method is low in production cost, green and environment-friendly and has important practical application value.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.
Claims (7)
1. The grouting material for the offshore wind power suction pile foundation is characterized by comprising the following components in percentage by weight:
and (3) cement: 30-35%;
fly ash: 55-65%;
mineral powder: 5-10%;
water reducing agent: 0.2 to 0.5 percent;
foaming agent: 0.1 to 0.5 percent;
anti-dispersant: 0.5 to 1.0 percent;
water-to-gel ratio: 1.09:1;
wherein the water is seawater.
2. A grouting material for a foundation of a marine wind power suction pile according to claim 1, wherein the cement is p.o42.5portland cement.
3. The grouting material for the offshore wind power suction pile foundation according to claim 1, wherein the fly ash is class I fly ash, and the specific surface area is more than or equal to 400m 2 /kg。
4. The grouting material for the offshore wind power suction pile foundation according to claim 1, wherein the mineral powder is S105 grade superfine mineral powder, and the specific surface area is more than or equal to 3000m 2 /kg。
5. A grouting material for a foundation of a marine wind power suction pile according to claim 1, wherein the foaming agent is HT-180 plastic foaming agent.
6. The grouting material for the offshore wind power suction pile foundation according to claim 1, wherein the water reducing agent is polycarboxylate water reducing agent powder, and the water reducing rate is more than or equal to 25%.
7. The grouting material for the offshore wind power suction pile foundation according to claim 1, wherein the grouting material comprises the following components in percentage by weight: the preparation method comprises the steps of weighing cement, fly ash, mineral powder, a water reducer, an anti-dispersant and a foaming agent according to a proportion through an electronic scale, mixing dry powder, pouring into a stirrer, stirring uniformly, entering a finished product warehouse, and packaging by an automatic packaging machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011517965.XA CN112759320B (en) | 2020-12-21 | 2020-12-21 | High-fluidity low-density grouting material for offshore wind power suction pile foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011517965.XA CN112759320B (en) | 2020-12-21 | 2020-12-21 | High-fluidity low-density grouting material for offshore wind power suction pile foundation |
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| Publication Number | Publication Date |
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| CN112759320A CN112759320A (en) | 2021-05-07 |
| CN112759320B true CN112759320B (en) | 2023-05-05 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113277796A (en) * | 2021-05-13 | 2021-08-20 | 西北矿冶研究院 | Deep soft rock roadway side wall grouting reinforcement material |
| CN113526924A (en) * | 2021-06-10 | 2021-10-22 | 福建省中海福海洋科技有限公司 | Special grouting material for offshore wind power suction type foundation and preparation method thereof |
| CN114751694A (en) * | 2022-04-12 | 2022-07-15 | 阳江海上风电实验室 | Cement grouting material suitable for marine environment and preparation method thereof |
| CN114890738B (en) * | 2022-05-09 | 2023-07-28 | 阳江海上风电实验室 | Special underwater light grouting material for filling suction cylinder of offshore wind turbine and preparation method thereof |
| CN117550870B (en) * | 2024-01-12 | 2024-04-02 | 中建材中岩科技有限公司 | Low-density grouting material for offshore wind power suction barrel and preparation method thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104003681B (en) * | 2014-06-03 | 2016-04-27 | 中交上海三航科学研究院有限公司 | A kind of offshore wind farm jacket injection material and constructional method thereof |
| CN106866077A (en) * | 2017-03-14 | 2017-06-20 | 中交武汉港湾工程设计研究院有限公司 | A kind of immersed tube joint grouting concrete and preparation method thereof |
| CN107892533A (en) * | 2017-11-22 | 2018-04-10 | 广西云燕特种水泥建材有限公司 | A kind of waterfront structure Grouting Cement mortar and its production method |
| CN107827422B (en) * | 2017-11-24 | 2020-07-17 | 中铁隧道局集团有限公司 | High-waterproof synchronous grouting slurry for submarine shield tunnel |
| CN109650806B (en) * | 2018-12-06 | 2021-12-07 | 北京纽维逊建筑工程技术有限公司 | Cement-based grouting material for ocean engineering and preparation method thereof |
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