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Low-density grouting material and preparation method thereof

A grouting material and low-density technology, applied in the field of low-density grouting materials and preparation, can solve problems such as inapplicability

Active Publication Date: 2021-06-08
CCCC SHANGHAI HARBOR ENG DESIGN & RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In view of the general performance of grouting materials currently on the market, it is not suitable for this type of project

Method used

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  • Low-density grouting material and preparation method thereof
  • Low-density grouting material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0022] The density of silt on the surface of the seabed in a sea area is about 1200-1400kg / m 3 , in the negative pressure barrel fan foundation grouting filling project, the density of the grouting material must be less than or equal to 1200kg / m 3 .

[0023] It is now formulated that the density is less than or equal to 1200kg / m 3 grouting material:

[0024] Mix 10 parts of P·Ⅱ52.5 cement, 30 parts of silica fume, 24.89 parts of fly ash, 30 parts of polyphenylene particles, 5 parts of cellulose ether, 0.01 part of polycarboxylate superplasticizer and 0.01 part of plastic expansion agent, Form a dry mixture, then add 100 parts of fresh water, and stir evenly, that is, the density is less than or equal to 1200kg / m 3 grouting material.

Embodiment 2

[0026] The density of silt on the surface of the seabed in a sea area is about 1250-1380kg / m 3 , in the negative pressure barrel fan foundation grouting filling project, the density of the grouting material must be less than or equal to 1250kg / m 3 .

[0027] It is now formulated that the density is less than or equal to 1250kg / m 3 grouting material:

[0028] Mix 30 parts of P·O42.5 cement, 10 parts of silica fume, 30 parts of mineral powder, 26.67 parts of expanded perlite, 3 parts of sodium polyacrylate, 0.3 parts of sodium lignosulfonate water reducer and 1 part of plastic expansion agent , to form a dry mixture, then add 80 parts of fresh water, and stir evenly, that is, the density is less than or equal to 1250kg / m 3 grouting material.

Embodiment 3

[0030] The density of silt on the surface of the seabed in a sea area is about 1400-1600kg / m 3 , in the negative pressure barrel fan foundation grouting filling project, the density of the grouting material must be less than or equal to 1400kg / m 3 .

[0031] It is now formulated that the density is less than or equal to 1400kg / m 3 grouting material:

[0032] Mix 13.45 parts of sulphoaluminate cement, 70 parts of silica fume, 15 parts of expanded vermiculite, 1 part of cellulose ether, 0.5 parts of naphthalene-based water reducer and 0.05 parts of plastic expansion agent to form a dry material, and then add 70 parts Fresh water, stir evenly, that is, the density is less than or equal to 1400kg / m 3 grouting material.

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Abstract

The invention discloses a low-density grouting material and a preparation method thereof. The low-density grouting material comprises 10-85 parts of cement, 5-70 parts of an admixture, 1-30 parts of lightweight aggregate, 0.1-5 parts of a thickening agent, 0.01-1 part of a water reducing agent, 0.01-1 part of an expanding agent and 50-100 parts of water. The preparation method comprises the following steps: uniformly mixing the components according to a certain ratio to form a dry mixture, adding a certain amount of water, and uniformly mixing to obtain the low-density grouting material. The density of the prepared low-density grouting material is about 1,100-1,600kg / m<3> and is slightly lower than that of sludge by selecting the lightweight aggregate and increasing the water consumption, so the sludge at the bottom of a negative pressure cylinder is prevented from being turned up in the grouting construction process, and the construction quality is ensured; in order to ensure the water dispersion resistance of the grouting material under the conditions of use of the lightweight aggregate and large water-to-material ratio and avoid segregation and floating of the lightweight aggregate, the thickening agent is added to increase the viscosity of the grouting material, so that the layering and segregation problems of the grouting material under the large water-to-material ratio are overcome, and the underwater dispersion resistance of the grouting material is improved.

Description

technical field [0001] The application belongs to the field of foundation construction technology, in particular to a low-density grouting material and a preparation method. Background technique [0002] Offshore wind power is currently the main development direction in the domestic new energy field because of its rich resources, high utilization hours of power generation, no land occupation, proximity to load centers, and suitable for large-scale development. The foundation structure forms of offshore wind power mainly include gravity foundation, single pile foundation, jacket foundation, negative pressure cylinder foundation and floating foundation, etc. The negative pressure cylinder foundation is a new type of foundation used for offshore platform structures. Compared with other foundations, it has many advantages such as less investment, convenient installation and simple structure. [0003] Usually, the cavity area between the negative pressure cylinder and the seabed...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B28/06C04B111/70
CPCC04B28/04C04B28/06C04B2111/70C04B18/146C04B18/08C04B16/08C04B24/383C04B2103/302Y02W30/91
Inventor 张悦然汪冬冬张恒孙烜
Owner CCCC SHANGHAI HARBOR ENG DESIGN & RES INST
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