CN116199464A - Early-strength concrete based on modification and preparation process thereof - Google Patents

Early-strength concrete based on modification and preparation process thereof Download PDF

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Publication number
CN116199464A
CN116199464A CN202310293920.6A CN202310293920A CN116199464A CN 116199464 A CN116199464 A CN 116199464A CN 202310293920 A CN202310293920 A CN 202310293920A CN 116199464 A CN116199464 A CN 116199464A
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early strength
modified
agent
concrete
early
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Inventor
张文峰
成辉
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Jiangsu Wanbang New Material Technology Co ltd
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Jiangsu Wanbang New Material Technology Co ltd
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Priority to CN202310293920.6A priority Critical patent/CN116199464A/en
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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
    • 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
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/30—Oxides other than silica
    • C04B14/303—Alumina
    • 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
    • C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
    • C04B22/08—Acids or salts thereof
    • 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
    • C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
    • C04B22/08—Acids or salts thereof
    • C04B22/10—Acids or salts thereof containing carbon in the anion
    • 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
    • C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
    • C04B22/08—Acids or salts thereof
    • C04B22/12—Acids or salts thereof containing halogen in the anion
    • C04B22/124—Chlorides of ammonium or of the alkali or alkaline earth metals, e.g. calcium chloride
    • 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
    • C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
    • C04B22/08—Acids or salts thereof
    • C04B22/14—Acids or salts thereof containing sulfur in the anion, e.g. sulfides
    • C04B22/142—Sulfates
    • C04B22/147—Alkali-metal sulfates; Ammonium sulfate
    • 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
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/04—Carboxylic acids; Salts, anhydrides or esters thereof
    • 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
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/12—Nitrogen containing compounds organic derivatives of hydrazine
    • C04B24/122—Hydroxy amines
    • 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
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/24—Macromolecular compounds
    • 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
    • C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/0028—Aspects relating to the mixing step of the mortar preparation
    • C04B40/0039—Premixtures of ingredients
    • C04B40/0046—Premixtures of ingredients characterised by their processing, e.g. sequence of mixing the ingredients when preparing the premixtures
    • 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
    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/10—Accelerators; Activators
    • C04B2103/14—Hardening accelerators
    • 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
    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
    • C04B2103/302—Water reducers
    • 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
    • C04B2111/00008—Obtaining or using nanotechnology related materials
    • 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
    • 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

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Civil Engineering (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The invention provides a modified early strength concrete and a preparation process thereof, wherein the concrete comprises an early strength agent, a water reducing agent and a mineral admixture, and the early strength agent comprises the following components: modified nano C-S-H, calcium formate, triethanolamine and sodium sulfate; the modified nano C-S-H accounts for 30-45% of the mass of the early strength agent; the mineral admixture comprises the following components: calcium chloride, calcium bicarbonate, aluminum ore sand; the water reducer is a polycarboxylate water reducer; the doping amount of the early strength agent is 2.5% -7%. The modified early strength agent and the mineral admixture are added into the concrete, the organic early strength agent and the inorganic early strength agent are compounded, and the compressive strength of the concrete at low temperature is enhanced by adding the modified nano C-S-H; the sodium sulfate can obviously promote the hydration process of the concrete, can accelerate the hydration reaction of the cement and reduce the setting time of the cement.

Description

Early-strength concrete based on modification and preparation process thereof
Technical Field
The invention relates to a preparation process of early-strength concrete, in particular to modified early-strength concrete and a preparation process thereof.
Background
The concrete is the most used material for foundation construction, and the requirements on the concrete performance are different facing different use scenes, so that additives are required to be added into the concrete to ensure that the concrete has different performances. For example, the early strength agent is used as one of the additives of the concrete, is used for accelerating the hydration speed of cement mortar and enhancing the early strength of the concrete, and is generally suitable for emergency engineering, construction in low-temperature environment and the like.
The existing common early strength agents comprise organic agents, inorganic agents and composite systems, but excessive use of the early strength agents can produce adverse effects on concrete, such as sulfate in inorganic salts, excessive use of sulfate ions can cause unrecoverable plastic deformation of the concrete, damage the structure of the concrete, slow down the setting time of the concrete when the organic triethanolamine is excessively doped, and greatly reduce the construction efficiency. Therefore, how to reasonably use the early strength agent becomes a problem to be solved.
Disclosure of Invention
In order to further improve the early strength performance of concrete, the invention provides modified early strength-based concrete and a preparation process thereof, and the concrete scheme is as follows:
an early strength concrete based on modification, wherein the concrete comprises an early strength agent, a water reducing agent and a mineral admixture, and the early strength agent comprises the following components:
modified nano C-S-H, calcium formate, triethanolamine and sodium sulfate; the modified nano C-S-H accounts for 30-45% of the mass of the early strength agent;
the mineral admixture comprises the following components:
calcium chloride, calcium bicarbonate, aluminum ore sand;
the water reducer is a polycarboxylate water reducer;
the doping amount of the early strength agent is 2.5% -7%.
Further, the preparation method of the modified nano C-S-H comprises the following steps:
s1: mixing acetone and deionized water in proportion to prepare a modified solvent;
s2: weighing a composite silane coupling agent and adding the composite silane coupling agent into the modified solvent of S1;
s3: after ultrasonic dispersion, regulating the PH of the solution to be less than 5 by using a PH regulator;
s4: adding nano C-S-H, performing ultrasonic dispersion, transferring the solution to perform condensation reflux to obtain gel;
s5: and washing and purifying the gel, and then carrying out constant-temperature suction filtration and drying to finally obtain the modified nano C-S-H.
Further, the mass ratio of calcium formate to triethanolamine is 1: (0.08-0.25).
Further, the mass ratio of the composite silane coupling agent to the nano C-S-H is (0.25-0.7): 1, the composite silane coupling agent comprises KH550 and KH570.
Further, the constant temperature range of S5 is 50-60 ℃.
A preparation process of early strength concrete based on modification comprises the following steps:
s1: placing the early strength agent, the water reducing agent, the calcium chloride and the calcium bicarbonate into a mixer, and carrying out low-speed dry mixing until the mixture is uniformly mixed;
s2: after the powder is uniformly stirred, adding water for stirring;
s3: adding aluminum ore sand when water is added and stirring has certain fluidity, and accelerating to medium speed after maintaining low-speed stirring;
s4: when fluidity is again generated, the medium speed is maintained for 2 to 3 minutes, and stirring is stopped.
The beneficial effects are that:
the invention provides modified early-strength concrete, which is prepared by adding a modified early-strength agent and a mineral admixture into concrete, wherein the early-strength agent comprises modified nano C-S-H, calcium formate, triethanolamine and sodium sulfate, compounding an organic early-strength agent with an inorganic early-strength agent, and adding the modified nano C-S-H to enhance the compressive strength of the concrete at low temperature; the sodium sulfate can play an obvious role in promoting the hydration process of the concrete, can accelerate the hydration reaction of the cement and reduce the setting time of the cement;
the mineral admixture comprises calcium chloride, calcium bicarbonate and aluminum ore sand, the addition of the mineral admixture can provide a calcium source and an aluminum source for the concrete, and the addition of the calcium source and the aluminum source can enhance the early strength of the concrete;
the water reducer adopts the polycarboxylate water reducer, and the polycarboxylate water reducer is compounded with calcium formate and triethanolamine, so that the compressive strength of the concrete is improved through the synergistic effect of the polycarboxylate water reducer, the calcium formate and the triethanolamine.
Detailed Description
The present invention will be further described in detail with reference to examples, which are provided for the purpose of illustration only and are not intended to limit the scope of the present invention.
Example 1:
a preparation process of early strength concrete based on modification comprises the following steps:
(1) Preparation of modified nano C-S-H
S1: acetone and deionized water are mixed according to the proportion of 1:1, mixing and preparing a modified solvent;
s2: weighing a composite silane coupling agent, and adding the composite silane coupling agent into the modified solvent of S1, wherein the composite silane coupling agent comprises KH550 and KH570; the addition amount of the composite silane coupling agent is further that the mass ratio of the composite silane coupling agent to the nano C-S-H is 0.25:1
S3: after ultrasonic dispersion, the pH of the solution is adjusted to 4 by using a pH regulator;
s4: adding nano C-S-H, performing ultrasonic dispersion, transferring the solution to perform condensation reflux to obtain gel;
s5: and (3) washing and purifying the gel, performing constant-temperature suction filtration at 50 ℃, and drying to finally obtain the modified nano C-S-H.
(2) Placing the modified nano C-S-H prepared in the step (1), calcium formate, triethanolamine, sodium sulfate, a polycarboxylate water reducer, calcium chloride and calcium bicarbonate into a mixer, and carrying out low-speed dry mixing until the components are uniformly mixed; the mass ratio of calcium formate to triethanolamine is 1:0.08; wherein the doping amount of the early strength agent is 2.5%;
(3) After the powder is uniformly stirred, adding water for stirring;
(4) Adding aluminum ore sand when water is added and stirring has certain fluidity, and accelerating to medium speed after maintaining low-speed stirring;
(5) When fluidity is again present, the medium speed is maintained for 2min, and stirring is stopped.
Example 2:
(1) Preparation of modified nano C-S-H
S1: acetone and deionized water are mixed according to the proportion of 1:1, mixing and preparing a modified solvent;
s2: weighing a composite silane coupling agent, and adding the composite silane coupling agent into the modified solvent of S1, wherein the composite silane coupling agent comprises KH550 and KH570; the addition amount of the composite silane coupling agent is further that the mass ratio of the composite silane coupling agent to the nano C-S-H is 0.7:1
S3: after ultrasonic dispersion, the pH of the solution was adjusted to 4.5 using a pH adjuster;
s4: adding nano C-S-H, performing ultrasonic dispersion, transferring the solution to perform condensation reflux to obtain gel;
s5: and (3) washing and purifying the gel, performing constant-temperature suction filtration at 60 ℃, and drying to finally obtain the modified nano C-S-H.
(2) Placing the modified nano C-S-H prepared in the step (1), calcium formate, triethanolamine, sodium sulfate, a polycarboxylate water reducer, calcium chloride and calcium bicarbonate into a mixer, and carrying out low-speed dry mixing until the components are uniformly mixed; the mass ratio of calcium formate to triethanolamine is 1:0.25; wherein the doping amount of the early strength agent is 7%;
(3) After the powder is uniformly stirred, adding water for stirring;
(4) Adding aluminum ore sand when water is added and stirring has certain fluidity, and accelerating to medium speed after maintaining low-speed stirring;
(5) When fluidity is again present, the medium speed is maintained for 3min, and stirring is stopped.
Example 3:
a preparation process of early strength concrete based on modification comprises the following steps:
(1) Preparation of modified nano C-S-H
S1: acetone and deionized water are mixed according to the proportion of 1:1, mixing and preparing a modified solvent;
s2: weighing a composite silane coupling agent, and adding the composite silane coupling agent into the modified solvent of S1, wherein the composite silane coupling agent comprises KH550 and KH570; the addition amount of the composite silane coupling agent is further that the mass ratio of the composite silane coupling agent to the nano C-S-H is 0.5:1
S3: after ultrasonic dispersion, the pH of the solution is adjusted to 4 by using a pH regulator;
s4: adding nano C-S-H, performing ultrasonic dispersion, transferring the solution to perform condensation reflux to obtain gel;
s5: and (3) washing and purifying the gel, performing constant-temperature suction filtration at 55 ℃, and drying to finally obtain the modified nano C-S-H.
(2) Placing the modified nano C-S-H prepared in the step (1), calcium formate, triethanolamine, sodium sulfate, a polycarboxylate water reducer, calcium chloride and calcium bicarbonate into a mixer, and carrying out low-speed dry mixing until the components are uniformly mixed; the mass ratio of calcium formate to triethanolamine is 1:0.2; wherein the doping amount of the early strength agent is 5%;
(3) After the powder is uniformly stirred, adding water for stirring;
(4) Adding aluminum ore sand when water is added and stirring has certain fluidity, and accelerating to medium speed after maintaining low-speed stirring;
(5) When fluidity is again present, the medium speed is maintained for 3min, and stirring is stopped.
The compressive strength of the concrete was increased by 200% by examining the compressive strength of the concrete prepared in examples 1 to 3.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.

Claims (6)

1. The early strength concrete based on modification is characterized by comprising an early strength agent, a water reducing agent and a mineral admixture, wherein the early strength agent comprises the following components:
modified nano C-S-H, calcium formate, triethanolamine and sodium sulfate; the modified nano C-S-H accounts for 30-45% of the mass of the early strength agent;
the mineral admixture comprises the following components:
calcium chloride, calcium bicarbonate, aluminum ore sand;
the water reducer is a polycarboxylate water reducer;
the doping amount of the early strength agent is 2.5% -7%.
2. The modified early strength concrete according to claim 1, wherein the preparation method of the modified nano C-S-H is as follows:
s1: mixing acetone and deionized water in proportion to prepare a modified solvent;
s2: weighing a composite silane coupling agent and adding the composite silane coupling agent into the modified solvent of S1;
s3: after ultrasonic dispersion, regulating the PH of the solution to be less than 5 by using a PH regulator;
s4: adding nano C-S-H, performing ultrasonic dispersion, transferring the solution to perform condensation reflux to obtain gel;
s5: and washing and purifying the gel, and then carrying out constant-temperature suction filtration and drying to finally obtain the modified nano C-S-H.
3. The early strength concrete based on modification according to claim 1, wherein the mass ratio of calcium formate to triethanolamine is 1: (0.08-0.25).
4. The modified early-strength concrete according to claim 2, wherein the mass ratio of the composite silane coupling agent to the nano C-S-H is (0.25-0.7): 1, the composite silane coupling agent comprises KH550 and KH570.
5. A modified early strength concrete according to claim 2, wherein the S5 constant temperature is in the range of 50 to 60 ℃.
6. The process for preparing early strength concrete based on modification according to any one of claims 1 to 5, comprising the steps of:
s1: placing the early strength agent, the water reducing agent, the calcium chloride and the calcium bicarbonate into a mixer, and carrying out low-speed dry mixing until the mixture is uniformly mixed;
s2: after the powder is uniformly stirred, adding water for stirring;
s3: adding aluminum ore sand when water is added and stirring has certain fluidity, and accelerating to medium speed after maintaining low-speed stirring;
s4: when fluidity is again generated, the medium speed is maintained for 2 to 3 minutes, and stirring is stopped.
CN202310293920.6A 2023-03-24 2023-03-24 Early-strength concrete based on modification and preparation process thereof Pending CN116199464A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118307272A (en) * 2024-06-07 2024-07-09 中建材中岩科技有限公司 Grouting material for low-temperature early-strength offshore wind power jacket and preparation method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118307272A (en) * 2024-06-07 2024-07-09 中建材中岩科技有限公司 Grouting material for low-temperature early-strength offshore wind power jacket and preparation method thereof
CN118307272B (en) * 2024-06-07 2024-08-13 中建材中岩科技有限公司 Grouting material for low-temperature early-strength offshore wind power jacket and preparation method thereof

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