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Hydrophilic double-component grouting plugging material

A leakage plugging material and two-component technology, applied in the field of high-performance hydrophilic polyurethane/water glass two-component grouting plugging material and its preparation, can solve the problem of insufficient curing time, poor stability of consolidated body, and adjustable The problem of small range, etc., to achieve the effect of efficient water blocking and water blocking performance, fast gel speed, and improving water blocking efficiency.

Active Publication Date: 2015-04-29
JIANGSU SOBUTE NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] Water glass is the earliest material used in chemical grouting. Water glass slurry will react after being mixed with a certain gelling agent to form a strong viscous material. Consolidative silica gel, which is connected with soil particles to form a whole, thus plays a role of anti-seepage and reinforcement for stratum and other structures. Water glass slurry is a solution-type slurry material with low initial viscosity and good injectability. It has a wide range of sources, low cost, less toxic and side effects on the environment, and basically does not pollute the environment. Due to its superior comprehensive performance, it is still one of the most widely used chemical grouting materials, but it also has its shortcomings. The specific performance is that the curing time is not stable enough, the adjustable range is small, and the stability of the consolidated body is poor. As a result, this type of slurry is generally only used in semi-permanent or temporary projects.

Method used

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  • Hydrophilic double-component grouting plugging material
  • Hydrophilic double-component grouting plugging material
  • Hydrophilic double-component grouting plugging material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Weigh 95g of highly hydrophilic polyether polyol (functionality 3, molecular weight 6000, EO / PO=75:25), 5g of polyvinyl alcohol 2000, and 10g of DBP into the reaction kettle together, at a vacuum degree of -0.08MPa , vacuum dehydration at 115°C for 2 hours; after cooling down to 60°C, add 20g of toluene diisocyanate into the reaction kettle under nitrogen atmosphere, and react for 3h; Finally, add 60 g of propylene carbonate and 0.02 g of benzenesulfonyl chloride into the reaction kettle under a nitrogen atmosphere, stir for 20 minutes, and discharge to obtain Component A.

[0039] (2) Dissolve 0.5g of stannous octoate and 5g of diethylenetriamine in 100g of water glass solution (the mass fraction of sodium silicate is 30%, and the modulus of sodium silicate is 3.5) to obtain component B.

[0040] (3) Mix component A and component B at a volume ratio of 1:5 to prepare a hydrophilic polyurethane / water glass composite hydrogel sample.

[0041] Table 1 Main technical ...

Embodiment 2

[0046] (1) Weigh 80g of highly hydrophilic polyether polyol (functionality 3, molecular weight 8200, EO / PO=80:20), 20g of PTMEG1000, 50g of DOP and put them into the reactor together. Vacuum dehydration at ℃ for 2 hours; after cooling down to 60℃, add 9g of toluene diisocyanate into the reaction kettle under nitrogen atmosphere, and react for 3h; keep at 60℃, add 31g of liquefied diphenylmethane diisocyanate into the reaction kettle under nitrogen atmosphere Isocyanate, continue to react for 1h; add 0.3g dibutyltin dilaurate to the reaction kettle to continue the reaction for 1h, after cooling down to 50°C, add 20g of mixed dibasic acid ester and 0.05g of anhydrous phosphoric acid to the reaction kettle under nitrogen atmosphere, After stirring for 10-30 minutes, the material is discharged to obtain component A.

[0047] (2) Dissolve 2g of triethylamine and 2g of triethanolamine in 100g of water glass solution (the mass fraction of sodium silicate is 30%, and the modulus of so...

Embodiment 3

[0054] (1) Weigh 90g of highly hydrophilic polyether polyol (functionality 3, molecular weight 10000, EO / PO=95:5), 10g of polyvinyl alcohol 200, and 30g of DOP into the reaction kettle together. MPa, vacuum dehydration at 115°C for 2h; after cooling down to 60°C, add 27.6g of toluene diisocyanate to the reactor under nitrogen atmosphere, and react for 3h; keep at 60°C, add 33.4g more Phenyl polymethylene polyisocyanate, continue to react for 1h; add 0.23g 2,2-bismorpholinyl diethyl ether to the reaction kettle and continue to react for 1h, after cooling down to 50°C, put it into the reaction kettle under nitrogen atmosphere Add 40g of 1,2-propanediol carbonate and 0.03g of tartaric acid, stir for 10-30min, and discharge to obtain component A.

[0055] (2) Dissolve 1g of N,N-dimethylbenzylamine and 4g of m-phenylenediamine in 100g of water glass solution (the mass fraction of sodium silicate is 60%, and the modulus of sodium silicate is 1.5) to obtain the composition Point B. ...

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Abstract

The invention relates to a hydrophilic double-component grouting plugging material. The hydrophilic double-component grouting plugging material comprises a component A and a component B with a grouting volume ratio of 1: 1-5, wherein the component A comprises the following substances in parts by weight: 100 parts of polyether polyol, 10-50 parts of a plasticizer, 20-60 parts of isocyanate, 0.05-0.3 part of a catalyst, 20-60 parts of a solvent and 0.01-0.05 part of a retarder; the component B comprises the following substances in parts by weight: 100 parts of sodium silicate, 2-5 parts of a cross-linking agent and 0.5-2 parts of a catalyst. The plugging material related to the invention also has the characteristics of environment protection, no pollution, low cost and high dynamic strength besides the properties of great grouting capability, high gelatinizing speed, large water containing quantity and rapid and efficient seepage-proof plugging. The grouting plugging material is suitable for the grouting plugging of various buildings, such as ponds, water towers and basements, and the grouting plugging engineering of various ports, docks, bridge piers, dams and hydropower station curtains.

Description

Technical field [0001] The present invention involves the field of grouting and waterproofing, and especially involves a high -performance hydrophilic polyurethane / water glass dual composition grouting material and its preparation methods. Background technique [0002] The molecular chain of the hydrophilic polyurethane grouting material has good hydrophilicity in its own structure. After the water is encountered, it will be emulsified and dispersed.In dozens of times of water, a gel -shaped solid with a certain intensity is finally formed. During the reaction process, the water is both a diluent and a curing agent.Both weak alkaline water can be solidified and have great development potential.However, there are many shortcomings in the traditional hydrophilic polyurethane grouting materials, which are mainly manifested in the suction and swelling gels.It is very likely to cause the project to "repeat" the project; in addition, due to the traditional hydrophilic polyurethane grou...

Claims

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Application Information

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IPC IPC(8): C08L75/08C08K3/34C08G18/79C08G18/76C08G18/48
Inventor 刘玉亭孙德文冉千平杨冲万赟李波尹浩
Owner JIANGSU SOBUTE NEW MATERIALS
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