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Thermal conducting water-stop slurry material and preparation and application thereof

A slurry and water-stop technology, which is applied to heat exchange materials, mining equipment, shaft equipment, etc., can solve problems such as uneven thermal conductivity, system instability, and crack water in areas with weak heat transfer that cannot be frozen normally. Simple, non-polluting environment and good flow performance

Active Publication Date: 2010-08-04
SHANGHAI CONSTRUCTION GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the slurry system is unstable or segregated, it is prone to uneven thermal conductivity, resulting in the failure of normal freezing of fissure water in areas with weak heat transfer, so the slurry must have certain stability

Method used

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  • Thermal conducting water-stop slurry material and preparation and application thereof
  • Thermal conducting water-stop slurry material and preparation and application thereof
  • Thermal conducting water-stop slurry material and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The heat-conducting water-stopping slurry is prepared according to the following raw material formula:

[0035] System stabilizer: layered aluminosilicate mineral-based thickener (Zhejiang Fenghong FHDF 15) 6.7wt%;

[0036] Heat conduction agent: graphite powder 20wt%;

[0037] Filling material: yellow sand 12.5wt%

[0038] Fluid agent: naphthalenesulfonate formaldehyde condensate (Grace S20) 0.8wt%;

[0039] Water: 60% by weight.

[0040] The properties of raw materials are shown in Table 1.

[0041] Table 1 Raw material properties

[0042] material name

Require

System stabilizer

Fine powder, 95% through 200 mesh

Heat conduction agent

Fine powder, thermal conductivity is 192W / m·K

Filler

The fineness modulus is 2.3

Fluid agent

Water reduction rate 20%

water

drinking water

[0043] Note: The water reducing rate is tested by the method of GB 8076-2008.

[0044] The preparation method of hea...

Embodiment 2

[0053] The heat-conducting water-stopping slurry is prepared according to the following raw material formula:

[0054] System stabilizer: CMC (sodium carboxymethylcellulose) 0.5w%

[0055] Heat conduction agent: graphite powder 40w%

[0056] Filling material: heavy calcium carbonate stone powder 23.5w%

[0057] Fluid agent: polycarboxylate water reducer (Sika Viscocrete 33010) 1.0wt%;

[0058] Water: 35%

[0059] Mix the dry materials such as heat conducting agent, filling material and system stabilizer evenly in advance, and dissolve the flow agent evenly in water to make an aqueous solution. Further, add the aqueous solution to the mixed dry material and continue stirring until the slurry material is uniform. After that, it can be injected into the freezing box for use.

Embodiment 3

[0061] The heat-conducting water-stopping slurry is prepared according to the following raw material formula:

[0062] System stabilizer: layered aluminosilicate mineral-based thickener 20w%

[0063] Heat conduction agent: graphite powder 5w%

[0064] Filling material: yellow sand 9.5w%

[0065] Fluid agent: polycarboxylate water reducer (Sika Viscocrete 33010) 0.5wt%;

[0066] Water: 65w%

[0067] Mix the dry materials such as heat conducting agent, filling material and system stabilizer evenly in advance, and dissolve the flow agent evenly in water to make an aqueous solution. Further, add the aqueous solution to the mixed dry material and continue stirring until the slurry material is uniform. After that, it can be injected into the freezing box for use. The slurry is used in situations where the temperature of the slurry itself is low, the ambient temperature is low, and the flow rate of liquid nitrogen is relatively high, which does not require high thermal conductivity...

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Abstract

The invention discloses a thermal conducting water-stop slurry material and preparation and application thereof. The thermal conducting water-stop slurry comprises the following raw materials in percentage by weight: 0.5-20% of system stabilizing agents, 5-40% of heat conducting agents, 5-50% of filling materials, 0.5-5% of fluidizing agents and 35-65% of water. The thermal conducting water-stop slurry has good thermal conduction performance, excellent water-stop performance and high stability, can be free of segregation and weeping in a long time and can be used as the thermal conducting working medium in the construction methods of freezing the casing box through shield break in and break out and stopping water.

Description

technical field [0001] The invention relates to a water-stop grout material with high thermal conductivity and its preparation and application. Background technique [0002] The construction technology of shield tunnel entry and exit is a key link in shield tunnel construction. When the shield machine enters and exits the hole, the well wall at the entrance needs to be chiseled. If it is not handled properly, the soil outside the well will collapse into the working well, causing the surface to subside and endanger the underground pipelines and adjacent buildings. The muddy water shield will also appear on the ground. Pulping and other issues. In soft soil areas with abundant groundwater, construction risks are even higher. At present, the combination of soil reinforcement and water stop technology is often used. [0003] Since the reinforcement and improvement of the soil means the increase of the cost and the extension of the construction period, and the expansion of the...

Claims

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Application Information

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IPC IPC(8): C09K5/08E21D11/38
Inventor 廖晓敏许永和周云鲁文嘉
Owner SHANGHAI CONSTRUCTION GROUP
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