Viscosity time-varying grouting material with controllable dynamic water dispersion and condensation resistance and preparation method thereof

Abstract

The invention discloses a dynamic-water dispersion-resistant condensation-controllable viscosity time-varying grouting material, which is prepared from 0.6 to 0.8 part of water, 1 part of a cementing material component and 0.03 to 0.05 part of an additive component. The Portland cement is taken as a main raw material, and the composite anti-dispersing agent is added, so that a polymer film and glue can be formed among cement particles, and the anti-dispersing performance of the slurry is improved; the water reducing agent, the retarder and the sulphoaluminate cement are used for regulating and controlling the hydration process of the cement, so that the fluidity and the setting time of the slurry are regulated and controlled, meanwhile, the structural strength of cement particles is enhanced, and the dispersion resistance of the slurry is further enhanced. According to the invention, by adjusting the production and addition amount of each component, the cement can be prepared, wherein the initial fluidity is 160-220mm, the pumping period is 5-20min, the water initial setting time is 30-120min, the underwater initial setting time is 40-160min, and the 28d compressive strength is greater than 15MPa; the flow velocity of underground water is not greater than 0.6 m / s, and the retention rate is greater than 80%.

Description

Technical Field

[0001] The invention belongs to the field of geological engineering and geotechnical engineering and involves water inrush blocking and grouting reinforcement of water-rich strata, and specifically relates to a dynamic water anti-dispersion and condensation controllable viscosity time-varying grouting material and a preparation method thereof. Background Art

[0002] With the implementation of the national deep-earth strategy, underground engineering construction, resource exploration and development are continuously expanding to the deep strata. The engineering geological and hydrogeological conditions faced by engineering construction and resource exploration are becoming more and more complex. Among them, high-pressure, large-flow, and high-temperature groundwater inrush has become a key issue restricting the safe construction and operation of the project. Grouting, as one of the effective technologies for blocking water inrush and reinforcing broken rock mass, is widely used in many fields such as tunnel water inrush sealing, broken surrounding rock reinforcement, water-rich stratum reinforcement and anti-seepage.

[0003] The effect of grouting to seal water inrush from fissures or grouting to reinforce water-rich strata is affected by the properties of the grouting materials. At present, common grouting materials include cement slurry, cement-water glass slurry and chemical slurry. Cement slurry has the characteristics of wide material sources, low price and low environmental impact, and is widely used in various grouting projects; chemical slurry has the characteristics of good injectability and controllable properties, but has problems of toxicity, environmental pollution and poor durability. In addition, under dynamic water conditions, the slurry quickly disperses and dilutes in the water, making it difficult to achieve rapid and efficient consolidation and filling under dynamic water conditions, resulting in poor engineering results.

[0004] Patent CN118955064A uses fast-setting and fast-hardening high Bailey sulphoaluminate cement, anti-dispersant, water reducer, etc. to prepare underwater grouting materials, and the pumping period is >30min. Patent CN118754567A uses silicate cement, fly ash, silica ash, polyacrylamide, polyvinyl alcohol fiber, polycarboxylic acid type high-efficiency water reducer, etc. as raw materials to prepare anti-dispersion slurry, with a setting time of 30 to 45min, and does not reflect fluidity and setting adjustability. Patent CN118851680A uses silicate cement, sulphoaluminate cement, mineral powder, polyacrylamide, redispersible latex powder and hydroxypropyl methylcellulose ether to prepare underwater non-dispersible slurry, with an initial setting time of 53 to 60min and a fluidity of more than 320mm after 30min. Patent CN117602897A uses cement, mineral powder, silica powder, collapse-preserving polycarboxylic acid water reducer, high-efficiency polycarboxylic acid water reducer, cement hydration control agent and flocculant to prepare a super slow-setting anti-dispersion slurry with a setting time of more than 24 hours, but does not mention the dynamic water dispersibility and stone rate.

[0005] In order to solve the problem of uncontrollable dispersibility and setting time of cement slurry under dynamic water conditions, developing a grouting material with good initial fluidity, strong injectability, low dynamic water dispersibility, and controllable flow and setting is the key to solving the difficulties faced by dynamic water grouting in this field. Summary of the invention

[0006] In view of the above problems, the present invention aims to provide a dynamic water anti-dispersion and coagulation controllable viscosity time-varying grouting material and a preparation method.

[0007] The present invention is achieved through the following technical solutions:

[0008] The present invention first discloses a dynamic water anti-dispersion and coagulation controllable viscosity time-varying grouting material, comprising:

[0009] 0.6-0.8 parts of water;

[0010] 1 part cementitious material component; and

[0011] 0.03-0.05 parts of admixture components, including:

[0012] The cementitious material component is composed of silicate cement and sulphoaluminate cement in a mass ratio of 1:0 to 0.2;

[0013] The admixture components are composed of composite anti-dispersant, water reducer and retarder in a mass ratio of 1-5%: 0.3-1.2%: 0-0.2%. Further, the silicate cement is selected from ordinary silicate cement PO 42.5 or composite silicate cement PC42.5; the sulphoaluminate cement is fast-hardening sulphoaluminate cement.

[0014] Furthermore, the composite anti-dispersant is prepared by the following method:

[0015] Adding acrylamide, 2-acrylamido-2-methylpropanesulfonic acid, a hydrophobic monomer hexadecyl allyl dimethyl ammonium chloride and HPMC into a reaction container to obtain a mixture;

[0016] Add 15-25% by mass of water to the mixture, adjust the pH to 8, add ammonium persulfate at room temperature, place the reaction system in an adiabatic environment for reaction, insert a temperature recorder to record the reaction temperature, and terminate the reaction when the temperature no longer increases;

[0017] Add hydrolyzing agent NaOH according to the hydrolysis degree of 20-25%, stir evenly, and place in a sealed container at 95°C for hydrolysis reaction for 2 hours;

[0018] The hydrolyzed colloid is dried by freeze drying and then ground to obtain a composite anti-dispersant.

[0019] Furthermore, the mass ratio of acrylamide, 2-acrylamido-2-methylpropanesulfonic acid, hydrophobic monomer hexadecyl allyl dimethyl ammonium chloride and HPMC is 1:0.7:0.02:1.

[0020] Furthermore, the water reducer is sodium lignin benzene sulfonate water reducer; and the retarder is sodium gluconate.

[0021] The present invention also discloses a method for preparing any of the above-mentioned dynamic water anti-dispersion and anti-condensation controllable viscosity time-varying grouting materials, comprising:

[0022] (1) Weigh silicate cement and sulphoaluminate cement, mix them evenly, and obtain a cementitious material component for later use;

[0023] (2) Weigh the water reducer, add water, stir and dissolve, and obtain a water reducer solution for later use;

[0024] (3) adding the cementitious material components to the water reducing agent solution and stirring to obtain a basic slurry for use;

[0025] (4) Weigh the retarder, add the remaining amount of water to dissolve it, and add it to the base slurry, stir for 30 seconds, and obtain the slurry for use;

[0026] (5) Add the composite anti-dispersion agent into the slurry and continue stirring to obtain a dynamic water anti-dispersion and coagulation controllable viscosity time-varying grouting material.

[0027] Furthermore, the amount of water added in step (2) is 90% of the total amount of water; and the stirring time is 10 to 30 seconds.

[0028] Furthermore, the stirring time in step (3) is 30 seconds.

[0029] Furthermore, the continuous stirring time in step (5) is 30 to 60 seconds.

[0030] The invention also discloses a dynamic water anti-dispersion and coagulation controllable time-varying viscosity grouting material prepared according to any of the above-mentioned preparation methods.

[0031] The beneficial effects of the present invention are:

[0032] 1. The main cementitious material of the present invention is ordinary Portland cement, which has a wide source of materials, low price, and reliable mechanical properties and durability of general materials; the fast-hardening sulphoaluminate cement itself is a cementitious material, and after compounding with ordinary Portland cement, it can act as an accelerator to adjust the setting time of the slurry; the sodium wood benzene sulfonate water reducer also has a retarding effect, which can reduce the amount of the retarder, and is low in price.

[0033] 2. The present invention uses silicate cement as the main raw material, and the addition of a composite anti-dispersion agent can form a polymer film and bonding between cement particles, thereby improving the anti-dispersion performance of the slurry; the cement hydration process is regulated by a water reducer, a retarder and sulphoaluminate cement, thereby achieving regulation of the slurry fluidity and setting time, while also enhancing the structural strength of the cement particles, further enhancing the anti-dispersion performance of the slurry, and achieving the multifunctionality of the slurry's anti-dispersion and controllable setting through the synergistic effect of multiple admixtures, thereby solving the problem of a single admixture regulating a single performance.

[0034] 3. By adjusting the production and addition amount of each component, the present invention can obtain an initial fluidity of 160-220 mm, a pumpable period of 5-20 min, an initial setting time above water of 30-120 min, an initial setting time underwater of 40-160 min, a 28d compressive strength greater than 15 MPa; the groundwater flow rate is not greater than 0.6 m / s, and the retention rate is greater than 80%. Specific implementation plan

[0035] The technical solution of the present invention is further described below in conjunction with the embodiments, but is not limited thereto. The present invention is further described below in conjunction with the embodiments.

[0036] Example 1

[0037] In this embodiment, the dynamic water anti-dispersion condensation controllable viscosity time-varying grouting material is composed of a gelling material and an admixture component, including:

[0038] 0.6 parts water;

[0039] 1 part cementitious material component; and

[0040] 0.041 parts of admixture components, including:

[0041] The cementitious material components include silicate cement and sulphoaluminate cement in a mass ratio of 1:0.1;

[0042] The admixture components include a composite anti-dispersant, a water reducing agent and a retarder in a mass ratio of 3%:1%:0.1%.

[0043] The composite anti-dispersant is polymerized by acrylamide, 2-acrylamido-2-methylpropanesulfonic acid, hydrophobic monomer hexadecyl allyl dimethyl ammonium chloride and HPMC in a mass ratio of 1:0.7:0.02:1, the water reducer is sodium lignin benzene sulfonate, and the retarder is sodium gluconate;

[0044] The specific preparation steps are as follows:

[0045] (1) weighing cement and sulphoaluminate cement according to mass percentage and mixing the two uniformly to obtain a dry powder cementitious material;

[0046] (2) Weigh sodium lignin benzene sulfonate water reducer according to mass percentage, add 90% of the required amount of water, and stir for 10 to 30 seconds to dissolve;

[0047] (3) Add the mixed cement to the solution containing the water reducer and stir for 30 seconds to obtain the desired base slurry;

[0048] (4) weighing sodium gluconate retarder according to mass percentage, dissolving it with the remaining 10% of water, and adding it to the base slurry, stirring for 30 seconds, and obtaining the slurry for later use;

[0049] (5) The composite anti-dispersion agent powder weighed in mass percentage is directly added to the slurry, and then stirred for 30 to 60 seconds to obtain a dynamic water anti-dispersion coagulation controllable viscosity time-varying grouting material. Subsequently, the initial fluidity, pumpable period, above-water and underwater coagulation time, 3d compressive strength, and 0.6m / s and 1.2m / s dynamic water scouring retention rates of the slurry are tested, and the specific data are shown in Table 1.

[0050] Table 1 Grouting slurry properties

[0051]

[0052] Example 2

[0053] In this embodiment, the dynamic water anti-dispersion condensation controllable viscosity time-varying grouting material is composed of a gelling material and an admixture component, including:

[0054] 0.6 parts water;

[0055] 1 part cementitious material component; and

[0056] 0.043 parts of admixture components, including:

[0057] The cementitious material components include silicate cement and sulphoaluminate cement in a mass ratio of 1:0.2;

[0058] The admixture components include a composite anti-dispersant, a water reducing agent and a retarder in a mass ratio of 3%:1.2%:0.1%.

[0059] The composite anti-dispersant is polymerized by acrylamide, 2-acrylamido-2-methylpropanesulfonic acid, hydrophobic monomer hexadecyl allyl dimethyl ammonium chloride and HPMC in a mass ratio of 1:0.7:0.02:1, the water reducer is sodium lignin benzene sulfonate, and the retarder is sodium gluconate;

[0060] The specific preparation steps are as follows:

[0061] (1) weighing cement and sulphoaluminate cement according to mass percentage and mixing the two uniformly to obtain a dry powder cementitious material;

[0062] (2) Weigh sodium lignin benzene sulfonate water reducer according to mass percentage, add 90% of the required amount of water, and stir for 10 to 30 seconds to dissolve;

[0063] (3) Add the mixed cement to the solution containing the water reducer and stir for 30 seconds to obtain the desired base slurry;

[0064] (4) weighing sodium gluconate retarder according to mass percentage, dissolving it with the remaining 10% of water, and adding it to the base slurry, stirring for 30 seconds, and obtaining the slurry for later use;

[0065] (5) The composite anti-dispersion agent powder weighed in mass percentage is directly added to the slurry, and then stirred for 30 to 60 seconds to obtain the anti-dispersion coagulation controllable viscosity time-varying grouting material with the required working performance. Subsequently, the initial fluidity, pumpable period, above-water and underwater coagulation time, 3d compressive strength, and 0.6m / s and 1.2m / s dynamic water scouring retention rates of the slurry are tested, and the specific data are shown in Table 2.

[0066] Table 2 Grouting slurry properties

[0067]

[0068] Example 3

[0069] In this embodiment, the dynamic water anti-dispersion condensation controllable viscosity time-varying grouting material is composed of a gelling material and an admixture component, including:

[0070] 0.6 parts water;

[0071] 1 part cementitious material component; and

[0072] 0.064 parts of admixture components, including:

[0073] The cementitious material components include silicate cement and sulphoaluminate cement in a mass ratio of 1:0.2;

[0074] The admixture components include a composite anti-dispersant, a water reducing agent and a retarder in a mass ratio of 5%:1.2%:0.2%.

[0075] The composite anti-dispersant is polymerized by acrylamide, 2-acrylamido-2-methylpropanesulfonic acid, hydrophobic monomer hexadecyl allyl dimethyl ammonium chloride and HPMC in a mass ratio of 1:0.7:0.02:1, the water reducer is sodium lignin benzene sulfonate, and the retarder is sodium gluconate;

[0076] The specific preparation steps are as follows:

[0077] (1) weighing cement and sulphoaluminate cement according to mass percentage and mixing the two uniformly to obtain a dry powder cementitious material;

[0078] (2) Weigh sodium lignin benzene sulfonate water reducer according to mass percentage, add 90% of the required amount of water, and stir for 10 to 30 seconds to dissolve;

[0079] (3) Add the mixed cement to the solution containing the water reducer and stir for 30 seconds to obtain the desired base slurry;

[0080] (4) weighing sodium gluconate retarder according to mass percentage, dissolving it with the remaining 10% of water, and adding it to the base slurry, stirring for 30 seconds, and obtaining the slurry for later use;

[0081] (5) The composite anti-dispersion agent powder weighed in mass percentage is directly added to the slurry, and then stirred for 30 to 60 seconds to obtain the anti-dispersion coagulation controllable viscosity time-varying grouting material with the required working performance. Subsequently, the initial fluidity, pumpable period, above-water and underwater coagulation time, 3d compressive strength, and 0.6m / s and 1.2m / s dynamic water scouring retention rates of the slurry are tested, and the specific data are shown in Table 3.

[0082] Table 3 Grouting slurry properties

[0083]

[0084] Comparative Example 1

[0085] In this implementation case, the dynamic water anti-dispersion grouting material is composed of a cementitious material and an admixture component, including:

[0086] 0.6 parts water;

[0087] 1 part cementitious material component; and

[0088] 0.042 parts of admixture components, including:

[0089] The cementitious material component includes Portland cement in a mass ratio of 1;

[0090] The admixture components include a composite anti-dispersant and a water reducing agent in a mass ratio of 3%:1.2%.

[0091] The specific preparation steps are as follows:

[0092] (1) Weigh cement according to mass percentage and set aside;

[0093] (2) Weigh the sodium lignin benzene sulfonate water reducer according to the mass percentage, add 100% of the required amount of water, and stir for 10 to 30 seconds to dissolve;

[0094] (3) Add cement to the solution containing the water reducer and stir for 30 seconds to obtain the desired base slurry;

[0095] (4) The composite anti-dispersion agent powder weighed in mass percentage is directly added to the slurry, and then stirred for 30 to 60 seconds to obtain the anti-dispersion coagulation controllable viscosity time-varying grouting material with the required working performance. Subsequently, the initial fluidity, pumpable period, above-water and underwater coagulation time, 3d compressive strength, and 0.6m / s and 1.2m / s dynamic water scouring retention rates of the slurry are tested, and the specific data are shown in Table 4.

[0096] Table 4 Grouting slurry properties

[0097]

[0098] Comparative Example 2

[0099] In this embodiment, the dynamic water anti-dispersion condensation controllable viscosity time-varying grouting material is composed of a gelling material and an admixture component, including:

[0100] 0.6 parts water;

[0101] 1 part cementitious material component; and

[0102] 0.031 parts of admixture components, including:

[0103] The cementitious material components include silicate cement and sulphoaluminate cement in a mass ratio of 1:0.1;

[0104] The admixture components include a composite anti-dispersant and a retarder in a mass ratio of 3%:0.1%.

[0105] The composite anti-dispersant is polymerized by acrylamide, 2-acrylamido-2-methylpropanesulfonic acid, hydrophobic monomer hexadecyl allyl dimethyl ammonium chloride and HPMC in a mass ratio of 1:0.7:0.02:1, the water reducer is sodium lignin benzene sulfonate, and the retarder is sodium gluconate;

[0106] The specific preparation steps are as follows:

[0107] (1) weighing cement and sulphoaluminate cement according to mass percentage and mixing the two uniformly to obtain a dry powder cementitious material;

[0108] (2) Weigh 90% of the required water by mass, add cement, and stir for 10 to 30 seconds to dissolve to obtain the required base slurry;

[0109] (3) Weighing sodium gluconate retarder according to mass percentage, dissolving it with the remaining 10% of water, and adding it to the base slurry, stirring for 30 seconds, and obtaining the slurry for later use;

[0110] (5) The composite anti-dispersion agent powder weighed in mass percentage is directly added to the slurry, and then stirred for 30 to 60 seconds to obtain a dynamic water anti-dispersion coagulation controllable viscosity time-varying grouting material. Subsequently, the initial fluidity, pumpable period, above-water and underwater coagulation time, 3d compressive strength, and 0.6m / s and 1.2m / s dynamic water scouring retention rates of the slurry are tested, and the specific data are shown in Table 5.

[0111] Table 5 Grouting slurry properties

[0112]

[0113] Comparative Example 3

[0114] In this embodiment, the dynamic water anti-dispersion condensation controllable viscosity time-varying grouting material is composed of a gelling material and an admixture component, including:

[0115] 0.6 parts water;

[0116] 1 part cementitious material component; and

[0117] 0.041 parts of admixture components, including:

[0118] The cementitious material components include silicate cement and sulphoaluminate cement in a mass ratio of 1:0.1;

[0119] The admixture components include a composite anti-dispersant, a water reducing agent and a retarder in a mass ratio of 3%:1%:0.1%.

[0120] The anti-dispersant is polyacrylamide, the water reducing agent is sodium lignin benzene sulfonate, and the retarder is sodium gluconate;

[0121] The specific preparation steps are as follows:

[0122] (1) weighing cement and sulphoaluminate cement according to mass percentage and mixing the two uniformly to obtain a dry powder cementitious material;

[0123] (2) Weigh sodium lignin benzene sulfonate water reducer according to mass percentage, add 90% of the required amount of water, and stir for 10 to 30 seconds to dissolve;

[0124] (3) Add the mixed cement to the solution containing the water reducer and stir for 30 seconds to obtain the desired base slurry;

[0125] (4) weighing sodium gluconate retarder according to mass percentage, dissolving it with the remaining 10% of water, and adding it to the base slurry, stirring for 30 seconds, and obtaining the slurry for later use;

[0126] (5) The composite anti-dispersion agent powder weighed in mass percentage is directly added to the slurry, and then stirred for 30 to 60 seconds to obtain a dynamic water anti-dispersion coagulation controllable viscosity time-varying grouting material. Subsequently, the initial fluidity, pumpable period, above-water and underwater coagulation time, 3d compressive strength, and 0.6m / s and 1.2m / s dynamic water scouring retention rates of the slurry are tested, and the specific data are shown in Table 6.

[0127] Table 6 Grouting slurry properties

[0128]

[0129]

[0130] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various technical features in any other suitable manner, and these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A dynamic water anti-dispersion and condensation controllable viscosity time-varying grouting material, comprising: 0.6-0.8 parts of water; 1 part of cementitious material component; as well as 0.03-0.05 parts of admixture components, including: The cementitious material component is composed of silicate cement and sulphoaluminate cement in a mass ratio of 1:0 to 0.2; The admixture components include composite anti-dispersant, water reducing agent and retarder, which account for 1-5%: 0.3-1.2%: 0-0.2% of the mass ratio of the cementitious material.

2. The dynamic water anti-dispersion and coagulation controllable viscosity time-varying grouting material according to claim 1, wherein: The silicate cement is selected from ordinary silicate cement PO 42.5 or composite silicate cement PC 42.5; The sulphoaluminate cement is a fast-hardening sulphoaluminate cement.

3. The dynamic water anti-dispersion and coagulation controllable viscosity time-varying grouting material according to claim 1, wherein: The composite anti-dispersant is prepared by the following method: Adding acrylamide, 2-acrylamido-2-methylpropanesulfonic acid, a hydrophobic monomer hexadecyl allyl dimethyl ammonium chloride and HPMC into a reaction container to obtain a mixture; Add 15-25% by mass of water to the mixture, adjust the pH to 8, add ammonium persulfate at room temperature, place the reaction system in an adiabatic environment for reaction, insert a temperature recorder to record the reaction temperature, and terminate the reaction when the temperature no longer increases; Add hydrolyzing agent NaOH according to the hydrolysis degree of 20-25%, stir evenly, and place in a sealed container at 95°C for hydrolysis reaction for 2 hours; The hydrolyzed colloid is dried by freeze drying and then ground to obtain a composite anti-dispersant.

4. The dynamic water anti-dispersion and coagulation controllable viscosity time-varying grouting material according to claim 3, wherein: The mass ratio of acrylamide, 2-acrylamido-2-methylpropanesulfonic acid, hydrophobic monomer hexadecyl allyl dimethyl ammonium chloride and HPMC is 1:0.7:0.02:

1.

5. The dynamic water anti-dispersion and coagulation controllable viscosity time-varying grouting material according to claim 1, wherein: The water reducer is sodium lignin benzene sulfonate water reducer; The retarder is sodium gluconate.

6. A method for preparing the dynamic water anti-dispersion and coagulation controllable time-varying viscosity grouting material according to any one of claims 1 to 5, comprising: (1) Weigh silicate cement and sulphoaluminate cement, mix them evenly, and obtain a cementitious material component for later use; (2) Weigh the water reducer, add water, stir and dissolve, and obtain a water reducer solution for later use; (3) adding the cementitious material components to the water reducing agent solution and stirring to obtain a basic slurry for use; (4) Weigh the retarder, add the remaining amount of water to dissolve it, and add it to the base slurry, stir for 30 seconds, and obtain the slurry for use; (5) Add the composite anti-dispersion agent into the slurry and continue stirring to obtain a dynamic water anti-dispersion and coagulation controllable viscosity time-varying grouting material.

7. The preparation method according to claim 6, wherein: The amount of water added in step (2) is 90% of the total water; The stirring time is 10 to 30 seconds.

8. The preparation method according to claim 6, wherein: The stirring time in step (3) is 30s.

9. The preparation method according to claim 6, wherein: The continuous stirring time in step (5) is 30 to 60 seconds.

10. A dynamic water-resistant, anti-dispersion and coagulation grouting material with controllable time-varying viscosity, obtained by the preparation method according to any one of claims 6 to 9.

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