Anti-seepage grouting material and preparation method thereof

Abstract

The invention relates to the technical field of grouting reinforcement materials, and discloses an anti-seepage grouting material and a preparation method thereof.The anti-seepage grouting material is prepared from, by mass, 860-900 parts of industrial waste residues, 80-120 parts of bentonite, 1-5 parts of a water reducing agent, 20-30 parts of water glass, 1-3 parts of a cross-linking agent, 1-3 parts of an accelerant and a proper amount of water; the preparation method of the anti-seepage grouting material comprises the following steps: S1, uniformly stirring industrial waste residues and water, adding a water reducing agent, and uniformly stirring to obtain slurry A; s2, uniformly mixing the slurry A with bentonite to obtain slurry B; s3, mixing the slurry B with water glass, a cross-linking agent and an accelerant to obtain the grouting material. According to the prepared anti-seepage grouting material, cement is replaced with industrial waste residues such as the fly ash, the mineral slag and the steel slag to serve as the grouting material, the good water corrosion resistance is achieved, it is effectively guaranteed that the grouting material obtained through mixing is better in durability, all components cooperate, and the anti-seepage and water plugging effects are obvious.

Description

Technical Field

[0001] The present invention relates to the technical field of grouting reinforcement materials, and particularly relates to a seepage-proof grouting material and a preparation method thereof. Background Art

[0002] In China, the distribution area of groundwater in karst areas is about 828,300 square kilometers, which is stored in the cave cracks of carbonate rocks (limestones). According to statistics, 60% of mine accidents are related to the action of groundwater. And with the increase of mining depth, the water hazard is becoming more and more serious. Mine water inrush has become one of the main disasters restricting the safe production of mines. At the same time, the same problems and challenges are also faced during the construction of deep tunnels. Especially when constructing tunnels under water-rich geological conditions, the problem of construction water inrush is particularly prominent, which greatly affects the construction efficiency and economic efficiency. Therefore, the problem of groundwater during mine mining and engineering construction has been paid more and more attention. It not only affects the progress of engineering construction, but also leads to the stability and safety of buildings. Water hazard prevention has always been a major technical problem restricting the safe production of mines. Nowadays, grouting technology is widely used in the prevention and control of water hazards. Grouting materials are the main substances that play a filling and consolidation role in formation cracks and pores, and are the key to realizing water plugging or reinforcement. Cement is a commonly used grouting material at present, but its strength is generally low. In the prior art, the strength of cement is generally improved by adding components such as fly ash, silica fume, slag, and fiber. However, the current grouting slurry does not have erosion resistance and has a high cost. The injected slurry is easily washed away by water, resulting in waste of the slurry and failing to achieve the purpose of leak prevention and water plugging, bringing safety and economic problems. Therefore, we have proposed a seepage-proof grouting material and a preparation method thereof. Summary of the Invention

[0003] The main purpose of the present invention is to provide a seepage-proof grouting material and a preparation method thereof, which can effectively solve the problems in the background art.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is as follows: A seepage-proof grouting material is prepared from the following raw materials in parts by mass: 860 - 900 parts of industrial waste residue, 80 - 120 parts of bentonite, 1 - 5 parts of water reducer, 20 - 30 parts of water glass, 1 - 3 parts of crosslinking agent, 1 - 3 parts of accelerator, and an appropriate amount of water.

[0005] Preferably, the mass parts of each component in the industrial waste residue are as follows: 10 - 20 parts of fly ash; 10 - 20 parts of steel slag; 20 - 30 parts of slag.

[0006] Preferably, the mass ratio of water to industrial waste residue is 0.45 - 0.7.

[0007] Preferably, the bentonite is organic bentonite.

[0008] Preferably, the pH value of the water is 6.5 to 7.5.

[0009] Preferably, the water reducing agent is sodium lignosulfonate, calcium lignosulfonate, casein or powdered polycarboxylate.

[0010] Preferably, the modulus of the sodium silicate is 2.60 to 2.90, and the concentration of the sodium silicate is 32 to 38 Baume degrees.

[0011] Preferably, the crosslinking agent is any one or more of N,N'-methylenebisacrylamide, divinylbenzene, diisocyanate, pentaerythritol diacrylate or ethylene glycol diacrylate.

[0012] The accelerator is any one of triethanolamine, tetramethylethylenediamine, calcium formate, calcium chloride, calcium nitrite.

[0013] A preparation method of an anti-seepage grouting material includes the following steps: S1: After uniformly stirring the industrial waste residue and water, adding a water reducing agent and stirring evenly to obtain slurry A, wherein the industrial waste residue includes fly ash, steel slag, and slag, and the mass ratio of the water to the industrial waste residue is 1-1.8:3; S2: Mixing slurry A and bentonite evenly to obtain slurry B; S3: Mixing slurry B with sodium silicate, a crosslinking agent, and an accelerator to obtain a grouting material.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, using industrial waste residues such as fly ash, slag, and steel slag instead of cement as the grouting material enables the consolidated body to have good water corrosion resistance. At the same time, the formed polymer network structure gel fills the pores of the consolidated body, preventing the pores from being enlarged by long-term water erosion and causing the collapse of the consolidated body. The effect is remarkable and suitable for wide promotion.

[0015] 2. In the present invention, industrial waste residues such as fly ash, slag, and steel slag are used. Since there is no sodium ion in the structure of the industrial waste residue, even if it is in a dynamic water environment for a long time, the composite grouting material does not have a hydrolysis problem, effectively ensuring better durability of the mixed grouting material.

[0016] 3. The preparation method of the present invention increases the content of active clay minerals in the slurry by adding bentonite, generates many different agglomeration forms in the slurry, and converts part of the free water into bound water in the network structure to form a thixotropic gel of non-Newtonian fluid type, so that the grouting material has good durability, anti-dispersion and other advantages; by adding sodium silicate, the gelling time of the material can be accelerated, and relatively stable micelles are generated by reacting with the slurry, making the slurry become viscous to form a paste; by adding a water reducing agent, the slurry can be made more easily pumpable, the porosity is reduced, and the compactness of the slurry solidification is increased, thereby greatly improving the strength and impermeability of the material; controlling the dosage of each component, and the cooperation of each component improves the anti-seepage and water-blocking effect of the slurry. Brief Description of the Drawings

[0017] Figure 1 It is a flowchart for the preparation of an anti-seepage grouting material of the present invention. Detailed Embodiments Examples

[0018] As Figure 1 shown, an anti-seepage grouting material is prepared from the following raw materials in parts by mass: 860 parts of industrial waste residue, 80 parts of bentonite, 1 part of water reducing agent, 20 parts of sodium silicate, 1 part of crosslinking agent, 1 part of accelerator and an appropriate amount of water.

[0019] The mass parts of each component in the industrial waste residue are respectively: 10 parts of fly ash; 10 parts of steel slag; 20 parts of slag.

[0020] The mass ratio of the water to the industrial waste residue is 0.45.

[0021] The bentonite is organic bentonite.

[0022] The pH value of the water is 6.5.

[0023] The water reducing agent is sodium lignosulfonate, calcium lignosulfonate, casein or powdered polycarboxylate.

[0024] The modulus of the sodium silicate is 2.60, and the concentration of the sodium silicate is 32 Baume degrees.

[0025] The crosslinking agent is any one or more of N, N'-methylenebisacrylamide, divinylbenzene, diisocyanate, pentaerythritol diacrylate or ethylene glycol diacrylate.

[0026] The accelerator is any one of triethanolamine, tetramethylethylenediamine, calcium formate, calcium chloride, calcium nitrite.

[0027] A preparation method of an anti-seepage grouting material includes the following steps: S1: After uniformly stirring the industrial waste residue and water, add a water reducing agent and stir evenly to obtain Slurry A, where the industrial waste residue includes fly ash, steel slag, and slag, and the mass ratio of water to the industrial waste residue is 1.8:3; S2: Mix Slurry A and bentonite evenly to obtain Slurry B; S3: Mix Slurry B with water glass, crosslinking agent, and accelerator to obtain the grouting material. Example

[0028] As Figure 1 shown, a seepage prevention grouting material is prepared from the following raw materials in parts by mass: 900 parts of industrial waste residue, 120 parts of bentonite, 5 parts of water reducing agent, 30 parts of water glass, 3 parts of crosslinking agent, 3 parts of accelerator, and an appropriate amount of water.

[0029] The mass parts of each component in the industrial waste residue are respectively: 20 parts of fly ash; 20 parts of steel slag; 30 parts of slag.

[0030] The mass ratio of the water to the industrial waste residue is 0.7.

[0031] The bentonite is organic bentonite.

[0032] The pH value of the water is 7.5.

[0033] The water reducing agent is sodium lignosulfonate, calcium lignosulfonate, casein, or powdered polycarboxylate.

[0034] The modulus of the water glass is 2.90, and the concentration of the water glass is 38 Baume degrees.

[0035] The crosslinking agent is any one or more of N, N'-methylenebisacrylamide, divinylbenzene, diisocyanate, pentaerythritol diacrylate, or ethylene glycol diacrylate.

[0036] The accelerator is any one of triethanolamine, tetramethylethylenediamine, calcium formate, calcium chloride, or calcium nitrite.

[0037] A preparation method of a seepage prevention grouting material includes the following steps: S1: After uniformly stirring the industrial waste residue and water, add a water reducing agent and stir evenly to obtain Slurry A, where the industrial waste residue includes fly ash, steel slag, and slag, and the mass ratio of water to the industrial waste residue is 1:3; S2: Mix Slurry A and bentonite evenly to obtain Slurry B; S3: Mix Slurry B with water glass, crosslinking agent, and accelerator to obtain the grouting material. Example

[0038] As Figure 1As shown, a seepage-proof grouting material is prepared from the following raw materials in parts by mass: 880 parts of industrial waste residue, 100 parts of bentonite, 3 parts of water reducing agent, 25 parts of water glass, 2 parts of crosslinking agent, 2 parts of accelerator and an appropriate amount of water.

[0039] The mass parts of each component in the industrial waste residue are as follows: 15 parts of fly ash; 15 parts of steel slag; 25 parts of slag.

[0040] The mass ratio of water to industrial waste residue is 0.62.

[0041] The bentonite is organic bentonite.

[0042] The pH value of the water is 7.0.

[0043] The water reducing agent is sodium lignosulfonate, calcium lignosulfonate, casein or powdered polycarboxylate.

[0044] The modulus of the water glass is 2.80, and the concentration of the water glass is 35 Baumé.

[0045] The crosslinking agent is any one or more of N, N'-methylenebisacrylamide, divinylbenzene, diisocyanate, pentaerythritol diacrylate or ethylene glycol diacrylate.

[0046] The accelerator is any one of triethanolamine, tetramethylethylenediamine, calcium formate, calcium chloride, calcium nitrite.

[0047] A preparation method of a seepage-proof grouting material comprises the following steps: S1: After uniformly stirring the industrial waste residue and water, add the water reducing agent and stir evenly to obtain slurry A, wherein the industrial waste residue includes fly ash, steel slag and slag, and the mass ratio of the water to the industrial waste residue is 1 - 1.8:3; S2: Mix slurry A and bentonite evenly to obtain slurry B; S3: Mix slurry B with water glass, crosslinking agent and accelerator to obtain the grouting material.

[0048] The present invention uses industrial waste residues such as fly ash, slag, and steel slag to replace cement as a grouting material, enabling the consolidated body to have good resistance to water erosion. At the same time, the formed polymer network structure gel fills the pores of the consolidated body, preventing the pores from being enlarged due to long-term water scouring and resulting in the disintegration of the consolidated body. The effect is remarkable and suitable for wide promotion. The industrial waste residues such as fly ash, slag, and steel slag used do not contain sodium ions in their structures. Therefore, even when in a dynamic water environment for a long time, the composite grouting material does not have a hydrolysis problem, effectively ensuring better durability of the mixed grouting material. The preparation method increases the content of active clay minerals in the slurry by adding bentonite, generating many different agglomeration forms in the slurry and converting part of the free water into bound water in the network structure to form a thixotropic gel of non-Newtonian fluid type, making the grouting material have advantages such as good durability and anti-dispersion. By adding water glass, the gelling time of the material can be accelerated, and a relatively stable micelle is generated by reacting with the slurry, making the slurry become viscous to form a paste slurry. By adding a water reducing agent, the slurry can be more easily pumped, the porosity can be reduced, and the compactness of the slurry solidification can be increased, thereby greatly improving the strength and impermeability of the material. By controlling the dosages of each component and the combined action of each component, the anti-seepage and water-blocking effect of the slurry can be improved.

[0049] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. An anti-seepage grouting material, characterized in that: It is prepared from the following raw materials in parts by mass: 860 - 900 parts of industrial waste residue, 80 - 120 parts of bentonite, 1 - 5 parts of water reducing agent, 20 - 30 parts of sodium silicate, 1 - 3 parts of crosslinking agent, 1 - 3 parts of accelerator and appropriate amount of water.

2. The anti-seepage grouting material according to claim 1, characterized in that: The parts by mass of each component in the industrial waste residue are as follows: 10 - 20 parts of fly ash; 10 - 20 parts of steel slag; 20 - 30 parts of slag.

3. The anti-seepage grouting material according to claim 1, wherein: The mass ratio of the water to the industrial waste residue is 0.45 - 0.

7.

4. The anti-seepage grouting material according to claim 1, characterized in that: The bentonite is organic bentonite.

5. The anti-seepage grouting material according to claim 1, characterized in that: The pH value of the water is 6.5 - 7.

5.

6. The anti-seepage grouting material according to claim 1, characterized in that: The water reducing agent is sodium lignosulfonate, calcium lignosulfonate, casein or powdered polycarboxylate.

7. An anti-seepage grouting material according to claim 1, characterized in that: The modulus of the sodium silicate is 2.60 - 2.90, and the concentration of the sodium silicate is 32 - 38 Baumé degrees.

8. The anti-seepage grouting material according to claim 1, characterized in that: The crosslinking agent is any one or more of N, N'-methylenebisacrylamide, divinylbenzene, diisocyanate, pentaerythritol diacrylate or ethylene glycol diacrylate.

9. The anti-seepage grouting material according to claim 1, characterized in that: The accelerator is any one of triethanolamine, tetramethylethylenediamine, calcium formate, calcium chloride or calcium nitrite.

10. The preparation method of an anti-seepage grouting material according to any one of claims 1-9, characterized in that: It includes the following steps: S1: After uniformly stirring the industrial waste residue and water, add the water reducing agent and stir evenly to obtain slurry A, wherein the industrial waste residue includes fly ash, steel slag and slag, and the mass ratio of the water to the industrial waste residue is 1 - 1.8:3; S2: Mix slurry A and bentonite evenly to obtain slurry B; S3: Mix slurry B with sodium silicate, crosslinking agent and accelerator to obtain the grouting material.

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