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Cement-based grouting material for fan foundation reinforcement and preparation method thereof

A technology of wind turbine foundation and grouting materials, which is applied in the field of wind power engineering materials, can solve the problems such as the need to improve the compressive strength, achieve the effects of improving the stability of the slurry, the preparation method is simple, and the compactness of the structure is improved

Active Publication Date: 2022-07-29
BEIJING NEW VISION BUILDING CONSTR TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cement-based reinforcement grouting materials used in the above patents are either designed to contain aggregates, or are designed with a single admixture, or use a single rheologically stable component. performance needs to be improved

Method used

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  • Cement-based grouting material for fan foundation reinforcement and preparation method thereof
  • Cement-based grouting material for fan foundation reinforcement and preparation method thereof
  • Cement-based grouting material for fan foundation reinforcement and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] P·Ⅱ52.5 Portland cement 81%, finely ground slag powder 4.4%, microbeads 5.2%, silica fume 1.5%, polycarboxylate water reducer 0.4%, polyether defoamer 0.05%, magnesia expansion agent 7.2%, cellulose ether 0.03%, organic bentonite 0.22%. After mixing the above materials uniformly, add water with a total mass of 24%, stir uniformly, and let stand for 1 min to obtain the cement-based grouting material of the present invention. The physical properties of the grouting materials tested under standard conditions are shown in Table 1.

Embodiment 2

[0034] P·Ⅱ52.5 Portland cement 73%, finely ground slag powder 8.2%, microbeads 10.3%, silica fume 3.5%, polycarboxylate water reducer 0.2%, polyether defoamer 0.03%, sulfoaluminate Calcium swelling agent 4.6%, cellulose ether 0.02%, organic bentonite 0.15%. After mixing the above materials uniformly, add water with a total mass of 19%, stir uniformly, and let stand for 1 min to obtain the cement-based grouting material of the present invention. The physical properties of the grouting materials tested under standard conditions are shown in Table 1.

Embodiment 3

[0036] P·O52.5R grade ordinary Portland cement 75%, finely ground slag powder 5.2%, microbeads 8%, silica fume 2.4%, polycarboxylate water reducer 0.3%, silicone defoamer 0.04%, magnesium oxide Bulking agent 8.9%, cellulose ether 0.02%, organic bentonite 0.14%. After mixing the above materials uniformly, add water with a total mass of 21%, stir uniformly, and let stand for 1 min to obtain the cement-based grouting material of the present invention. The physical properties of the grouting materials tested under standard conditions are shown in Table 1.

[0037] Table 1 Physical properties of the grouting material of the embodiment (standard laboratory test environment)

[0038]

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Abstract

The invention belongs to the field of building materials, and specifically discloses a cement-based grouting material for fan foundation reinforcement and a preparation method thereof. The raw material composition of the cement-based grouting material is as follows: 65% to 85% of cement, 10% to 37% of admixture, 0.2% to 0.6% of water reducing agent, 0.02% to 0.05% of defoamer, The expansion agent is 2% to 10%, the rheological stabilizer is 0.05% to 0.25%; the water is 18% to 25%, and water is removed, and the total weight of each component is 100%. The cement-based grouting material for fan foundation reinforcement provided by the invention has the advantages of high fluidity, high strength, micro-expansion, high durability and the like.

Description

technical field [0001] The invention belongs to the technical application field of wind power engineering materials, relates to a cement-based grouting material for fan foundation reinforcement and a preparation method thereof, and is particularly suitable for various fan foundation maintenance and reinforcement grouting. Background technique [0002] Since the 1990s, my country has successively carried out wind farm construction projects. After 2000, wind power generation as a clean energy project gradually showed a large-scale development. The wind power projects built in the early days were limited by the technical conditions at that time, and most of the connection methods between the tower and the foundation of the wind turbine were based on the ring type. This type of foundation is prone to local stress concentration on the bottom flange under the action of long-term fatigue dynamic load, and some of the concrete attached to the foundation ring of the fan has appeared ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B111/70
CPCC04B28/04C04B2111/70C04B2201/50C04B18/141C04B18/146C04B20/0016C04B2103/302C04B2103/50C04B24/383C04B22/00C04B22/066C04B22/148
Inventor 韩宇栋宋涛文张剑单云沛刘聆东丁小平李建霆易桂香徐涛
Owner BEIJING NEW VISION BUILDING CONSTR TECH
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