Tunnel leaking stoppage patching material and preparation method thereof

A plugging material and tunnel technology, which is applied in the field of tunnel engineering, can solve problems such as too fast setting time, weak bonding performance, poor shrinkage coefficient control, etc., and achieve the characteristics of not easy to separate and peel off, full powder filling function, and moderate rigidity Effect

Active Publication Date: 2017-06-13
CCCC WUHAN HARBOR ENG DESIGN & RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art, such as too fast setting tim

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Tunnel plugging material is composed of dry powder sand material and bonded waterproof emulsion, the weight ratio of the two parts is 1:1.25. Among them, the dry powder sand material includes the following components: 3.8kg of Portland cement, 1.2kg of fly ash, 4.0kg of nano-silicon dioxide, 0.05kg of propyl cellulose, 0.7kg of permeable crystalline material, and 0.25kg of nano-scale bentonite. Among them, the bonding waterproof emulsion includes: acrylate emulsion 6.5kg, vinyl acetate-ethylene copolymer emulsion 3.75kg, polyvinyl alcohol powder liquid 1.25kg, water-soluble methyl silicon emulsion 0.375kg, propylene glycol 0.25kg, sodium tripolyphosphate 0.25kg kg, nano aluminum hydroxide 0.125kg, defoamer 0.0012kg.

Embodiment 2

[0051] This example prepares 4 parts of tunnel plugging materials, which are composed of dry powder sand material and bonded waterproof emulsion. The composition of dry powder sand material and bonded waterproof emulsion is the same as that of Example 1, and the weight ratios of the two are 1:1, 1, respectively. :1.2, 1:1.4, 1:1.5.

[0052] The five different tunnel plugging materials prepared in Examples 1-2 were subjected to corresponding experimental research to test their performance in use, and the results are shown in the following table:

[0053] Table 1 Test results

[0054] Ratio of material to liquid* Initial setting time final setting time 1h compressive strength 3d compressive strength 1d impermeability pressure 7d impermeability pressure Min Min MPa MPa MPa MPa 1:1 30 74 16.9 31.1 1.3 2.7 1:1.2 30 81 18.1 33.6 1.6 3.2 1:1.25 33 82 19.2 34.5 1.5 3.1 1:1.4 32 85 17.2 32.9 1.2 2.6 1：1.5...

Embodiment 3

[0057] Tunnel plugging material, including dry powder sand material and bonded waterproof emulsion, the weight ratio of the two is 1:1.3. The dry sand material includes the following components: Portland cement 4kg, fly ash 1.4kg, silicon dioxide 3kg, propyl cellulose 0.1kg, permeable crystalline material 0.9kg, bentonite 0.6kg. The bonding waterproof emulsion includes: 6.76kg of acrylate emulsion, 3.9kg of vinyl acetate-ethylene copolymer emulsion, 1.3kg of polyvinyl alcohol rubber powder liquid, 0.39kg of water-soluble methyl silicon emulsion, 0.26kg of propylene glycol, sodium tripolyphosphate 0.26kg, aluminum hydroxide 0.13kg, defoamer 0.0013kg.

[0058] Apply the above-mentioned plugging material, the use process is as follows: First, stir and mix the dry powder sand material evenly, add the adhesive waterproof emulsion, continue to stir and mix evenly, and the mixture of the obtained plugging material is applied to the plugging of certain tunnels During construction and...

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Abstract

The invention discloses a tunnel leaking stoppage patching material, which comprises dry powder sand and bonding waterproof emulsion, wherein the weight ratio of the dry powder sand and bonding waterproof emulsion is 1: 1-1.5. The dry powder sand is prepared from, by weight percent, 20-40% of Portland cement, 5-14% of fly ash, 20-40% of silicon dioxide, 0.5-1.5% of propyl cellulose, 5-9% of capillary crystalline material, and 0.1-6% of bentonite; the total amount of the dry powder sand is 100%; the bonding waterproof emulsion is prepared from 4-65% of acrylate emulsion, 10-35% of vinyl acetate- ethylene copolymer emulsion, 10-18% of polyving akohol glue powder fluid, 3-7% of water-soluble methyl silicon emulsion, 1-6% of propylene glycol, 1-5% of sodium tripolyphosphate, 0.5-1.5% of aluminium hydroxide, and 0.01-0.05% of antifoaming agent. The leaking stoppage patching material is compounded with organic polymer and inorganic matter; the material reflects rigidity of the inorganic material, dimension stability, and shows the flexibility and processing property of the polymer; the product has good elasticity, flexibility, and moderate rigidity.

Description

technical field [0001] The invention belongs to the field of tunnel engineering, and relates to a plugging and repairing material, in particular to a tunnel plugging and repairing material and a preparation method thereof. Background technique [0002] The plugging materials currently used mainly include the following types. One is ordinary cement plus coagulant. The coagulant is divided into inorganic and organic. The inorganic coagulant is commonly used with water glass, and the organic coagulant includes organic solution. , fatty acid metal salts, etc., the advantages of this type of material: the setting time is very fast, and it can quickly plug leaks; the second type is synthetic plugging materials, which are composed of ordinary cement and waterproof materials, and are mostly made into waterproof coatings; the third type Use fast-hardening sulphoaluminate cement to achieve rapid plugging effect. [0003] Some of the above common plugging materials have too fast setti...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B111/72
CPCC04B28/04C04B2111/72C04B2201/50C04B18/08C04B14/06C04B24/383C04B2103/0068C04B14/104C04B24/2641C04B24/2623C04B24/42C04B24/026C04B22/16C04B22/06C04B2103/50
Inventor 徐文冰刘旷怡焦运攀阳俊李红君占文
Owner CCCC WUHAN HARBOR ENG DESIGN & RES
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