A grouting plugging liquid and its usage method

Abstract

The present invention belongs to the technical field of building materials, and particularly relates to a grouting sealing liquid and its use method. The present invention adopts an acrylate-based grouting sealing liquid, and its leakage stoppage principle mainly relies on its high fluidity and rapid solidification characteristics. During the grouting process, the acrylate grouting sealing liquid can quickly penetrate into the fine cracks of the building structure, and then rapidly solidify through a chemical reaction to form a firm sealing layer. This process can not only effectively stop leaks, but also enhance the overall strength of the structure and avoid the risk of later leakage. In addition, the sealing liquid provided by the present invention is a water-based system, environmentally friendly and non-toxic. The product before curing and the cured product are completely non-combustible and will not cause any harmful effects on the human body, organisms and the environment.

Description

Technical Field

[0001] The present invention belongs to the technical field of building materials, and particularly relates to a grouting plugging liquid and a using method thereof. Background Art

[0002] In recent years, with the rapid development of various rail transit, road traffic, tunnel subways, and the construction industry in China, it has entered a stage of high-speed innovation. Multi-story structures above ground and multi-story structures underground are constantly developing, facing various waterproof and leak-proof requirements.

[0003] The traditional grouting materials applied to soil reinforcement and tunnel engineering are mainly acrylamide. However, due to the certain toxicity of acrylamide, its use is restricted in engineering fields closely related to human life and production such as water source areas. Therefore, a new type of low-toxic or even non-toxic grouting material is needed to replace it. Summary of the Invention

[0004] The purpose of the present invention is to provide a grouting plugging liquid and a using method thereof. The grouting plugging liquid provided by the present invention is safe and non-toxic, and has excellent plugging effects.

[0005] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0006] The present invention provides a grouting plugging liquid, which includes component A and component B independently packaged;

[0007] Component A includes a first main agent and an accelerator independently packaged;

[0008] The first main agent includes sodium acrylate, magnesium acrylate, p-methoxyphenol, sodium citrate, and water;

[0009] The accelerator includes triethanolamine, tetra-hydroxyethyl ethylenediamine, polyethylene glycol, diethylene glycol, and water;

[0010] Component B includes a second main agent and a curing agent independently packaged;

[0011] The second main agent includes sodium acrylate, magnesium acrylate, p-methoxyphenol, sodium citrate, and water;

[0012] The mass percentage content of sodium acrylate in the first main agent is greater than that in the second main agent;

[0013] The mass percentage content of magnesium acrylate in the first main agent is less than that in the second main agent.

[0014] Preferably, the first main agent comprises components in the following mass percentages: 14-15% of sodium acrylate, 16-17% of magnesium acrylate, 2.0-6.0% of p-methoxyphenol, 0.2-0.5% of sodium citrate, and 65-70% of water.

[0015] Preferably, the accelerator comprises components in the following mass percentages: 45-50% of triethanolamine, 9-10% of tetra-hydroxyethyl ethylene diamine, 26-28% of polyethylene glycol, 3-4% of diethylene glycol, and 14-16% of water.

[0016] Preferably, the second main agent comprises components in the following mass percentages: 9-10% of sodium acrylate, 23-24% of magnesium acrylate, 0.1-0.2% of p-methoxyphenol, 0.3-0.5% of sodium citrate, and 66-69% of water;

[0017] Preferably, the curing agent comprises sodium persulfate.

[0018] Preferably, the mass ratio of the first main agent to the accelerator is 100:0.1-1.2;

[0019] The mass ratio of the second main agent to the curing agent is 100:0.5-1.3.

[0020] Preferably, the mass ratio of component A to component B is 100.1-101.2:100.5-101.3.

[0021] The present invention also provides a method for using the grouting plugging liquid according to the above technical solution, including usage method 1 and usage method 2;

[0022] The usage method 1 includes:

[0023] Mix the first main agent and the accelerator to obtain component A;

[0024] Mix the second main agent and the curing agent to obtain component B;

[0025] Perform double-fluid grouting on the component A and the component B for gelation;

[0026] The usage method 2 includes: Mix the component A and the component B and then perform single-fluid grouting for gelation.

[0027] Preferably, the time for starting gelation in the usage method 1 is 1-25 min.

[0028] Preferably, in the usage method 2, the mixing time of the component A and the component B is 0.5-1 min, and the time for starting gelation is 1.5-26 min.

[0029] The present invention provides a grouting plugging liquid, which includes component A and component B separately packaged; component A includes a first main agent and an accelerator separately packaged; the first main agent includes sodium acrylate, magnesium acrylate, p-methoxyphenol, sodium citrate and water; the accelerator includes triethanolamine, tetra-hydroxyethyl ethylenediamine, polyethylene glycol, diethylene glycol and water; component B includes a second main agent and a curing agent separately packaged; the second main agent includes sodium acrylate, magnesium acrylate, p-methoxyphenol, sodium citrate and water; the mass percentage content of sodium acrylate in the first main agent is greater than that in the second main agent; the mass percentage content of magnesium acrylate in the first main agent is less than that in the second main agent.

[0030] The present invention adopts an acrylate-based grouting plugging liquid, and its leakage plugging principle mainly depends on its high fluidity and rapid solidification characteristics. During the grouting process, the acrylate grouting plugging liquid can quickly penetrate into the fine cracks of the building structure, and then quickly solidify through chemical reactions to form a firm sealing layer. This process can not only effectively plug leaks, but also enhance the overall strength of the structure and avoid the risk of subsequent leakage.

[0031] Its reaction mechanism involves a complex chemical reaction process. When magnesium acrylate, sodium acrylate, water in the acrylate grouting plugging liquid come into contact with the accelerator and the curing agent, the internal chemical components will undergo a polymerization reaction to form high-molecular polymers. These polymers have high strength and stability, can effectively seal cracks and holes, and prevent the penetration of water. Specifically, after the reaction of magnesium acrylate, sodium acrylate, water in the acrylate grouting plugging liquid with the accelerator and the curing agent, polymers such as magnesium polyacrylate and sodium polyacrylate will be generated. This kind of polymer has good water resistance and chemical stability, can remain insoluble in water for a long time, and avoids the problem of slurry flow caused by the dissolution of traditional grouting materials. At the same time, the high-strength polymer formed by the acrylate grouting plugging liquid has high compressive strength and toughness, can withstand the stress changes of the building structure, and avoid the risk of leakage caused by structural deformation.

[0032] In addition, the plugging liquid provided by the present invention is a water-based system, which is environmentally friendly and non-toxic. The product before curing and the cured product are completely non-combustible and will not cause any harmful effects on the human body, organisms and the environment. Specific embodiments

[0033] The present invention provides a grouting plugging liquid, which includes component A and component B separately packaged;

[0034] Component A includes a first main agent and an accelerator separately packaged;

[0035] The first main agent includes sodium acrylate, magnesium acrylate, p-methoxyphenol, sodium citrate and water;

[0036] The accelerator includes triethanolamine, tetra-hydroxyethyl ethylene diamine, polyethylene glycol, diethylene glycol and water;

[0037] Component B includes a separately packaged second main agent and a curing agent;

[0038] The second main agent includes sodium acrylate, magnesium acrylate, p-hydroxyanisole, sodium citrate and water;

[0039] The mass percentage content of sodium acrylate in the first main agent is greater than that in the second main agent;

[0040] The mass percentage content of magnesium acrylate in the first main agent is less than that in the second main agent.

[0041] In the present invention, component A includes a separately packaged first main agent and an accelerator. In the present invention, the first main agent preferably includes the following components in mass percentage: 14-15% of sodium acrylate, 16-17% of magnesium acrylate, 2.0-6.0% of p-hydroxyanisole, 0.2-0.5% of sodium citrate and 65-70% of water, and more preferably 14.2-14.6% of sodium acrylate, 16.2-16.5% of magnesium acrylate, 3.2-5.0% of p-hydroxyanisole, 0.22-0.4% of sodium citrate and 65.48-68% of water.

[0042] In the present invention, the preparation method of the first main agent preferably includes the following steps:

[0043] Mix acrylic acid, p-hydroxyanisole, magnesium oxide and water for the first time to obtain an aqueous solution of magnesium acrylate;

[0044] Mix acrylic acid, sodium hydroxide and water for the second time to obtain an aqueous solution of sodium acrylate;

[0045] Mix sodium hydroxide, citric acid and water for the third time to obtain an aqueous solution of sodium citrate;

[0046] Mix the aqueous solution of magnesium acrylate, the aqueous solution of sodium acrylate and the aqueous solution of sodium citrate for the fourth time.

[0047] In the present invention, during the first mixing process, the water is preferably distilled water; the order of the first mixing is preferably as follows: dissolve acrylic acid in a part of the water to obtain an acrylic acid solution; disperse magnesium oxide in the remaining water to obtain a magnesium oxide dispersion; mix the acrylic acid solution, the magnesium oxide dispersion and p - hydroxy phenyl ether. In the present invention, the mass ratio of acrylic acid to a part of the water is preferably 38 - 42:45 - 50; the mass ratio of magnesium oxide to the remaining water is preferably 11 - 13:48 - 52; the mass ratio of acrylic acid to magnesium oxide is preferably 38 - 42:11 - 13; the mass ratio of acrylic acid to p - hydroxy anisole is preferably 38 - 42:0.1 - 0.2. In the present invention, the pH value of the magnesium acrylate aqueous solution is preferably 6.5 - 7.5; the mass concentration of the magnesium acrylate aqueous solution is preferably 30%.

[0048] In the present invention, during the second mixing process, the water is preferably distilled water; the order of the second mixing is preferably as follows: dissolve sodium hydroxide in a part of the water to obtain a sodium hydroxide solution; dissolve acrylic acid in the remaining water to obtain an acrylic acid solution; mix the acrylic acid solution and the sodium hydroxide solution; the mass ratio of sodium hydroxide to a part of the water is preferably 30 - 35:50 - 60; the mass ratio of acrylic acid to the remaining water is preferably 40 - 45:40 - 45; the mass ratio of acrylic acid to sodium hydroxide is preferably 40 - 45:30 - 35. In the present invention, the pH value of the sodium acrylate aqueous solution is preferably 6.5 - 7.5; the mass concentration of the sodium acrylate aqueous solution is preferably 40%.

[0049] In the present invention, during the third mixing process, the water is preferably distilled water; the order of the third mixing is preferably as follows: dissolve sodium hydroxide in a part of the water to obtain a sodium hydroxide solution; dissolve citric acid in the remaining water to obtain a citric acid solution; mix the citric acid solution and the sodium hydroxide solution; the mass ratio of sodium hydroxide to a part of the water is preferably 25 - 30:45 - 50; the mass ratio of citric acid to the remaining water is preferably 30 - 35:31 - 35; the mass ratio of citric acid to sodium hydroxide is preferably 30 - 35:25 - 30. In the present invention, the pH value of the sodium citrate aqueous solution is preferably 6.5 - 7.5; the mass concentration of the sodium citrate aqueous solution is preferably 30%.

[0050] In the present invention, during the fourth mixing process, the mass ratio of the magnesium acrylate aqueous solution, the sodium acrylate aqueous solution and the sodium citrate aqueous solution is preferably 50 - 55:33 - 38:1 - 2.

[0051] In the present invention, the first mixing, the second mixing, the third mixing and the fourth mixing are all preferably carried out under stirring conditions.

[0052] In the present invention, the accelerator preferably comprises components with the following mass percentages: triethanolamine 45-50%, tetra-hydroxyethyl ethylene diamine 9-10%, polyethylene glycol 26-28%, diethylene glycol 3-4%, and water 14-16%. More preferably, it comprises triethanolamine 46-48.5%, tetra-hydroxyethyl ethylene diamine 9.5-9.8%, polyethylene glycol 26.7-27%, diethylene glycol 3.4-3.6%, and water 14-16%.

[0053] In the present invention, the preparation method of the accelerator preferably comprises the following steps: stirring and mixing the components comprised in the accelerator.

[0054] In the present invention, the mass ratio of the first main agent to the accelerator is preferably 100:0.1-1.2, and specifically can be 100:0.1, 100:0.5, 100:1.0, 100:1.2.

[0055] In the present invention, component B comprises a second main agent and a curing agent which are separately packaged. In the present invention, the second main agent preferably comprises components with the following mass percentages: sodium acrylate 9-10%, magnesium acrylate 23-24%, p-hydroxyanisole 0.1-0.2%, sodium citrate 0.3-0.5%, and water 66-69%. More preferably, it comprises sodium acrylate 9.5-9.8%, magnesium acrylate 23.5-23.6%, p-hydroxyanisole 0.15-0.16%, sodium citrate 0.36-0.4%, and water 66.09-68%.

[0056] In the present invention, the preparation of the second main agent is preferably carried out with reference to the preparation method of the first main agent, the difference being that in the process of the fourth mixing, the mass ratio of the magnesium acrylate aqueous solution, the sodium acrylate aqueous solution, and the sodium citrate aqueous solution is preferably 70-80:20-30:1-2.

[0057] In the present invention, the curing agent preferably comprises sodium persulfate.

[0058] In the present invention, the mass ratio of the second main agent to the curing agent is preferably 100:0.5-1.3, and specifically can be 100:0.5, 100:0.8, 100:1.3.

[0059] In the present invention, the mass ratio of component A to component B is preferably 100.1-101.2:100.5-101.3.

[0060] The present invention also provides a method for using the grouting plugging liquid according to the above technical solution, including usage method 1 and usage method 2;

[0061] The usage method 1 includes:

[0062] Mix the first main agent and the accelerator to obtain Component A;

[0063] Mix the second main agent and the curing agent to obtain Component B;

[0064] Perform two-component grouting on the said Component A and Component B to achieve gelation;

[0065] The said Usage Method 2 includes: Mix Component A and Component B and then perform single-component grouting to achieve gelation.

[0066] In the present invention, for the said Usage Method 1, the time when gelation starts is preferably 1 - 25 minutes.

[0067] In the present invention, for the said Usage Method 2, the mixing time of Component A and Component B is preferably 0.5 - 1 minute, and the time when gelation starts is preferably 1.5 - 26 minutes.

[0068] Unless otherwise specified, the materials and equipment used in the present invention are all commercially available products in the art.

[0069] Next, the technical solutions in the present invention will be clearly and completely described in conjunction with the embodiments in the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without creative efforts shall fall within the protection scope of the present invention.

[0070] In the following examples and comparative examples, the formulations of the first main agent, the accelerator, the second main agent, and the curing agent are shown in Tables 1 - 4 respectively;

[0071] Table 1 Formulation of the first main agent (a)

[0072] Serial number Raw material name Mass percentage (%) 1 Sodium acrylate 14.6 2 Magnesium acrylate 16.5 3 p-Hydroxyanisole 3.2 4 Sodium citrate 0.22 5 Water 65.48

[0073] Table 2 Formulation of the accelerator (a1)

[0074] Serial number Raw material name Mass percentage (%) 1 Triethanolamine 48.5 2 Tetra-hydroxyethyl ethylenediamine 9.6 3 Polyethylene glycol 26.7 4 Diethylene glycol 3.4 5 Water 11.8

[0075] Table 3 Formulation of the second main agent (b)

[0076] Serial number Raw material name Mass percentage (%) 1 Sodium acrylate 9.8 2 Magnesium acrylate 23.6 3 p-Hydroxyanisole 0.15 4 Sodium citrate 0.36 5 Water 66.09

[0077] Table 4 Formulation of the curing agent (b1)

[0078] Serial number Raw material name Mass percentage (%) 1 Sodium persulfate 100

[0079] Examples and comparative examples

[0080] The specific construction process is: Mix the first main agent a and the accelerator a1 to obtain Component A;

[0081] Mix the second main agent b and the curing agent b1 to obtain Component B. Among them, the dosages of the first main agent and the second main agent remain unchanged (calculated according to a mass ratio of 100), and relevant comparative examples and examples are carried out by adjusting the dosages of the accelerator and the curing agent; the ratios of Component A and Component B in the examples and comparative examples are shown in Table 5;

[0082] Refer to the standard JC / T 2037-2010 "Acrylate Grouting Material" to test the performance of the obtained plugging liquid;

[0083] Table 5 Formulations of the grouting plugging liquid in examples and comparative examples

[0084]

[0085] Among them, the gel time is the time when gelation starts after Component A and Component B are mixed, and the gel formation time is the total time from when Component A and Component B are mixed to the formation of the plugging material;

[0086] It can be seen from the above five schemes that by adjusting the dosage of the accelerator, the gel time of the product can be adjusted. However, if the accelerator is missing, the product will not be able to form a gel. And it can be seen from the examples that the range of the mass ratio of the accelerator is controlled between 0.1 and 1.2, which is more appropriate. Through various data, it shows that the gel time and gel formation time of this product are relatively fast, and the length of the gel time is controllable, meeting the plugging requirements.

[0087] Although the above embodiments have described the present invention in detail, they are only a part of the embodiments of the present invention, rather than all embodiments. Other embodiments can also be obtained based on these embodiments without creative efforts, and these embodiments all fall within the protection scope of the present invention.

Claims

1. A grouting plugging liquid, characterized in that, It consists of independently packaged component A and component B; Component A is the independently packaged first main agent and accelerator; The first main agent is sodium acrylate, magnesium acrylate, p-hydroxyanisole, sodium citrate and water; The accelerator is triethanolamine, tetra-hydroxyethyl ethylenediamine, polyethylene glycol, diethylene glycol and water; Component B is the independently packaged second main agent and curing agent; The second main agent is sodium acrylate, magnesium acrylate, p-hydroxyanisole, sodium citrate and water; The first main agent is composed of the following components by mass percentage: sodium acrylate 14.6%, magnesium acrylate 16.5%, p-hydroxyanisole 3.2%, sodium citrate 0.22% and water 65.48%; The accelerator is composed of the following components by mass percentage: triethanolamine 48.5%, tetra-hydroxyethyl ethylenediamine 9.6%, polyethylene glycol 26.7%, diethylene glycol 3.4% and water 11.8%; The curing agent is sodium persulfate; The mass ratio of the first main agent to the accelerator is 100:1.2 or 100:1.0; The second main agent is composed of the following components by mass percentage: sodium acrylate 9.8%, magnesium acrylate 23.6%, p-hydroxyanisole 0.15%, sodium citrate 0.36% and water 66.09%; The mass ratio of the second main agent to the curing agent is 100:0.8; The mass ratio of component A to component B is 101:100.8 or 101.2:100.

8.

2. The method for using the grouting plugging liquid according to claim 1, characterized in that, It includes Usage Method 1 and Usage Method 2; Usage Method 1 includes: Mix the first main agent and the accelerator to obtain component A; Mix the second main agent and the curing agent to obtain component B; Perform double-fluid grouting on the said component A and component B for gelation; Usage Method 2 includes: Mix component A and component B and then perform single-fluid grouting for gelation; The starting time of gelation is 1 min or 3.5 min; The gel formation time is 12 - 16 min or 15 - 20 min.

Images