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High anti-penetration concrete mixing material for tunnel shield tube plate and its preparation method

A shield segment and concrete technology, which is applied in solid waste management, sustainable waste treatment, climate sustainability, etc., can solve the problem that the shield segment cannot meet the engineering requirements.

Inactive Publication Date: 2007-08-01
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, using the traditional technical route of configuring high-performance concrete to prepare high-impermeability concrete for shield segments will not be able to meet engineering requirements

Method used

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  • High anti-penetration concrete mixing material for tunnel shield tube plate and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1-2

[0024] 1, the preparation method of shield segment high impermeability concrete admixture, it comprises the following steps:

[0025] 1), prepare this admixture by mixing the raw material ratio of table 1:

[0026] Table 1 Mass percentage of each component of the admixture

[0027]

[0028] The mixed fiber is 3mm modified polypropylene fiber and 10mm modified polypropylene fiber compounded at a ratio of 2:1, and the surface of the used polypropylene fiber needs to be modified. Ferric nitrate and calcium sulfate use commercially pure chemicals.

[0029] 2) Add the silica fume and hybrid fibers into the blender in proportion and mix them. The hybrid fibers need to be dispersed manually before adding. The small particles of silica fume are used to disperse the fibers as evenly as possible.

[0030] 3) Mix and grind slag fine powder, ferric nitrate, calcium sulfate, and cement-based permeable crystalline powder in proportion, and then add fly ash to mix until the speci...

Embodiment 3

[0042] Shield segment high impermeability concrete admixture, which is mainly prepared by mixing and grinding slag, fly ash, silica fume and function adjustment component raw materials. The mass percentage of each raw material is: 25% slag, fly ash 47%, silica fume 25%, and functional adjustment component 3%; wherein the functional adjustment component is a reinforcing agent, a waterproofing agent and a toughening agent, and the mass percentage of the reinforcing agent, waterproofing agent, and toughening agent in the functional regulating component is: Strengthening agent 36%, waterproofing agent 51%, toughening agent 13%.

[0043] The reinforcing agent is formed by compounding ferric nitrate and calcium sulfate in a mass ratio of 1:1. The waterproofing agent is a cement-based permeable crystalline waterproofing material (powder). The toughening agent is a hybrid fiber, and the hybrid fiber is compounded by a modified polypropylene fiber of 3mm and a modified polypropylene f...

Embodiment 4

[0049] Shield segment high impermeability concrete admixture, which is mainly prepared by mixing and grinding slag, fly ash, silica fume and function adjustment component raw materials. The mass percentage of each raw material is: slag 40%, fly ash 40%, silica fume 15%, and functional adjustment components 5%; wherein the functional adjustment components are reinforcing agents, waterproofing agents and toughening agents, and the mass percentages of reinforcing agents, waterproofing agents and toughening agents in the functional regulating components are: Strengthening agent 40%, waterproofing agent 48%, toughening agent 12%.

[0050] The reinforcing agent is formed by compounding ferric nitrate and calcium sulfate in a mass ratio of 1:2. The waterproofing agent is a cement-based permeable crystalline waterproofing material (powder). The toughening agent is a hybrid fiber, and the hybrid fiber is compounded by a modified polypropylene fiber of 3mm and a modified polypropylene ...

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Abstract

The invention discloses a blending material and making method of shield-driven gilled tube concrete, which comprises the following parts: 25%-40% mineral slag, 40%-50% coal ash, 15%-25% wollastonite and 3%-6% functional regulating component, wherein the functional regulating component is composed of 36-40% reinforcer, 48-51% waterproofing agent and 10-15% flexibilizer.

Description

technical field [0001] The invention relates to a shield segment concrete admixture and a preparation method thereof. Background technique [0002] With the development of urbanization in our country, urban traffic is also developing in a three-dimensional direction. As a part of three-dimensional transportation, underground tunnels will play an important role in alleviating traffic congestion in cities in our country. Underground tunnels require concrete as a structural component to have good impermeability; at the same time, the shield tunneling method is the mainstream technology of tunnel engineering, and the shield segment is its most important and critical structural component. Therefore, the impermeability of shield segment concrete will directly affect the quality of the tunnel and its service life. [0003] For the shield segments, measures to improve the impermeability of the segments are divided into two categories: one is to paint waterproof materials on the wa...

Claims

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Application Information

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IPC IPC(8): C04B18/12C04B18/08C04B14/04C04B22/08C04B22/14C04B16/06
CPCC04B28/08C04B2111/27C04B2111/00724Y02W30/91C04B18/08C04B18/146C04B2103/65
Inventor 胡曙光金宇谢先启陈跃庆肖龙鸽马保国高英力
Owner WUHAN UNIV OF TECH
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