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Cement grouting material suitable for marine environment and preparation method thereof

A technology for cement grouting and marine environment, applied in the field of grouting materials, can solve the problems of inability to meet technical requirements, inability to meet market demands, and high transportation costs, and achieve the effects of improving structural integrity, excellent work performance, and low chloride ion permeability coefficient.

Pending Publication Date: 2022-07-15
阳江海上风电实验室 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Domestic brands cannot meet all technical requirements for offshore facility construction
The production bases of imported grouting materials are mainly located in Europe, which are expensive, have high transportation costs, and long delivery cycles, while the technology of domestic enterprises cannot meet market demand at present.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0049] The present embodiment also provides a method for preparing the above-mentioned cement grouting material, and the method includes the following steps:

[0050] Provide raw materials according to the above-mentioned components and component contents;

[0051] Premixing water reducing agent, defoaming agent, composite expansion agent, rheological agent and part of cement to obtain a first mixture;

[0052] Mixing the remaining cement, the active filler, the first mixture and the graded aggregate evenly to obtain the second mixture;

[0053] The second mixture is fully stirred with water to obtain the cement grouting material.

[0054] In some embodiments, the mass percentage of the part of the cement to the total cement is 1% to 10%.

[0055] In some embodiments, the water-solid ratio of the second mixture to water is 75-85:1000.

[0056] Compared with the prior art, the beneficial effects of this embodiment are:

[0057] 1) High fluidity: It has excellent fluidity an...

Embodiment 1

[0077] This embodiment provides a cement grouting material suitable for marine environment, which is composed of the following components by weight: 350 parts of cement, 100 parts of ultrafine mineral powder, 35 parts of microsilica, 510 parts of quartz sand, and 2.5 parts of water reducing agent. parts, 1 part of defoaming agent, 10 parts of compound expansion agent, and 0.2 part of rheology agent.

[0078] Among them, water reducing agent adopts water reducing agent I; defoaming agent adopts defoaming agent I; rheological agent adopts rheological agent I; composite expansion agent is composed of plastic expansion agent and HP-CSA high-performance expansion agent. The weight ratio of the compound is plastic expansion agent: HP-CSA high-performance expansion agent = 1:60; quartz sand is compounded by fineness of 8-16 mesh, 20-40 mesh, 30-50 mesh, 40-70 mesh quartz sand The proportion of each particle size compound is 45% of 8-16 mesh quartz sand, 20% of 20-40 mesh quartz sand,...

Embodiment 2

[0084] The difference with Example 1 is only the change of the raw material ratio, as follows:

[0085] 300 parts of cement, 150 parts of superfine mineral powder, 70 parts of microsilica, 530 parts of quartz sand, 4.5 parts of water reducing agent, 0.5 part of defoamer, 5 parts of compound expansion agent, and 0.05 part of rheology agent.

[0086] The percentage of quartz sand is 35% of 8-16 mesh quartz sand, 30% of 20-40 mesh quartz sand, 30% of 30-50 mesh quartz sand, and 5% of 40-70 mesh quartz sand.

[0087] In this embodiment, the weight ratio of the composite expansion agent is plastic expansion agent: HP-CSA high-performance expansion agent=1:40.

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Abstract

The invention relates to the field of grouting materials, and particularly discloses a cement grouting material suitable for a marine environment, which comprises the following raw materials by weight: 300-450 parts of cement; 70-220 parts of an active filler; 440 to 530 parts of graded aggregate; 1.5 to 4.5 parts of a water reducing agent; 0.5 to 2 parts of a defoaming agent; 5-20 parts of a composite expanding agent; 0.05 to 0.3 part of a rheological agent; the composite expanding agent is formed by compounding a plastic expanding agent and an ettringite lime composite expanding agent; the rheological agent is a microbial fermentation type rheological modifier; the water reducing agent is a modified polycarboxylic acid ether powdery water reducing agent with a comb-shaped structure. Through the synergistic effect of the raw materials such as the gel material, the active filler, the rheological agent, the composite expanding agent and the water reducing agent, the grouting material has excellent fluidity and system stability and high dispersion resistance in water, under the condition that fibers are not added, the 28d compressive strength exceeds 125MPa, the chloride ion permeability coefficient is extremely low, the sulfate corrosion resistance is high, and the grouting material has good application prospects. The ultrahigh-strength cement grouting material is very suitable for extremely complex marine environments.

Description

technical field [0001] The invention relates to the field of grouting materials, in particular to a cement grouting material suitable for marine environment and a preparation method thereof. Background technique [0002] Cement-based grouting material is a kind of special construction dry powder mortar with cement, sand, admixtures, etc. as the main raw materials. Preferred material. With the development of society, there are more and more projects such as super high-rise buildings, offshore oil production platforms, and offshore wind power. Especially for offshore projects, higher requirements are placed on the performance of materials. [0003] Grouting connection is the key and difficult point of offshore infrastructure construction, and has received extensive attention from the industry. With the development of offshore wind power construction in China, the site selection of wind farms has gradually moved from the intertidal zone to the sea, and the distance from the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B111/70C04B111/20C04B111/24
CPCC04B28/04C04B2111/70C04B2201/50C04B2111/2015C04B2111/24C04B18/141C04B18/146C04B14/06C04B2103/302C04B2103/50C04B22/148C04B22/064
Inventor 王小萍朱嵘华田振亚胡彬孙香屈励勃卢望舒
Owner 阳江海上风电实验室
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