CN116003071A - Anti-dispersion clay-thioaluminate grouting material for karst tunnel moving water blocking and preparation method thereof - Google Patents
Anti-dispersion clay-thioaluminate grouting material for karst tunnel moving water blocking and preparation method thereof Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 80
- 239000006185 dispersion Substances 0.000 title claims abstract description 31
- 239000000463 material Substances 0.000 title claims abstract description 31
- 230000000903 blocking effect Effects 0.000 title claims abstract description 15
- 238000002360 preparation method Methods 0.000 title abstract description 10
- 239000011159 matrix material Substances 0.000 claims abstract description 40
- 239000002002 slurry Substances 0.000 claims abstract description 33
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 31
- 239000011707 mineral Substances 0.000 claims abstract description 31
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 29
- 239000004568 cement Substances 0.000 claims abstract description 25
- 239000002270 dispersing agent Substances 0.000 claims abstract description 25
- 239000000654 additive Substances 0.000 claims abstract description 23
- 239000004927 clay Substances 0.000 claims abstract description 21
- 230000000996 additive effect Effects 0.000 claims abstract description 20
- 239000000017 hydrogel Substances 0.000 claims abstract description 13
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000005038 ethylene vinyl acetate Substances 0.000 claims abstract description 9
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims abstract description 9
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims abstract description 9
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims abstract description 9
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims abstract description 9
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 3
- 239000013530 defoamer Substances 0.000 claims description 21
- 238000003756 stirring Methods 0.000 claims description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 14
- 239000000843 powder Substances 0.000 claims description 11
- 238000002156 mixing Methods 0.000 claims description 10
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 claims description 10
- 238000005303 weighing Methods 0.000 claims description 10
- 239000004327 boric acid Substances 0.000 claims description 6
- 229920005646 polycarboxylate Polymers 0.000 claims description 6
- 239000000377 silicon dioxide Substances 0.000 claims description 6
- 235000012239 silicon dioxide Nutrition 0.000 claims description 6
- STCOOQWBFONSKY-UHFFFAOYSA-N tributyl phosphate Chemical group CCCCOP(=O)(OCCCC)OCCCC STCOOQWBFONSKY-UHFFFAOYSA-N 0.000 claims description 6
- 125000005619 boric acid group Chemical group 0.000 claims description 5
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 5
- 239000000292 calcium oxide Substances 0.000 claims description 5
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 5
- 239000000395 magnesium oxide Substances 0.000 claims description 5
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 5
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 5
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 5
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims 2
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 229920000642 polymer Polymers 0.000 abstract description 9
- 238000009991 scouring Methods 0.000 abstract description 7
- 239000002245 particle Substances 0.000 abstract description 5
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- 238000005054 agglomeration Methods 0.000 abstract description 3
- 230000002776 aggregation Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 230000008719 thickening Effects 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 230000000740 bleeding effect Effects 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 239000011414 polymer cement Substances 0.000 description 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 229910021487 silica fume Inorganic materials 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- 229920000536 2-Acrylamido-2-methylpropane sulfonic acid Polymers 0.000 description 1
- XHZPRMZZQOIPDS-UHFFFAOYSA-N 2-Methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid Chemical compound OS(=O)(=O)CC(C)(C)NC(=O)C=C XHZPRMZZQOIPDS-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 230000009920 chelation Effects 0.000 description 1
- -1 cracks Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 229910001653 ettringite Inorganic materials 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000005543 nano-size silicon particle Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000008030 superplasticizer Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The invention discloses a karst tunnel moving water blocking anti-dispersion clay-thioaluminate base grouting material and a preparation method thereof, wherein the grouting material comprises a matrix component and an additive component, wherein: the matrix component consists of clay and sulphoaluminate cement, and the additive component consists of an anti-dispersant, a retarder, a water reducer, a defoaming agent and a mineral admixture. The invention is based on sulphoaluminate cement and clay, hydroxypropyl methyl cellulose, ethylene-vinyl acetate, villus nano hydrogel and mineral admixture are added, the polymer long chain structure increases agglomeration, the slurry viscosity is improved, a film forming polymer can be formed, the cohesive strength and the anti-scouring performance are improved, the villus structure of the hydrogel ensures that the super-strong water absorption performance is realized in the slurry, the anti-scouring performance of the cement slurry is further improved, the mineral admixture improves the slurry performance of a matrix, and superfine particles can be wrapped and adsorbed by a high polymer chain, the cohesiveness of a slurry system is improved, and the thickening effect is realized.
Description
Technical Field
The invention belongs to the technical field of karst high-speed quick-acting water blocking in underground engineering, relates to a flowing water grouting material, and in particular relates to an anti-dispersion clay-thioaluminate-based grouting material for flowing water blocking of a karst tunnel and a preparation method thereof.
Background
Due to erosion and geological effects, a large number of pores, cracks, holes, pipelines, karsts and underground rivers are formed in the karst region, and larger karst pipelines can be formed by further expansion. In tunnel, subway and mining construction, once these karst pipelines are exposed, water burst and mud burst are easily initiated, and secondary disasters such as surface subsidence are accompanied. The characteristic of high flow rate, strong supply and high water pressure of karst pipeline water burst has become one of the main factors restricting the development of underground engineering construction in karst areas. The grouting technology is used for filling and repairing the underground cracks and holes by injecting the curing material, has strong applicability and is an effective means for solving underground engineering disasters. The performance of the grouting material is a main influencing factor of whether the grouting is successful, and the problems of poor dispersion resistance, low strength and the like of the traditional grouting under the high-flow-rate dynamic water pressure often cause the construction failure of grouting plugging leakage under the dynamic water condition. In order to solve the problem, high polymer cement is often used as a dynamic water grouting material in construction, and the high polymer increases the viscosity of slurry and improves the attractive force among cement particles, so that the high polymer cement has high dispersion resistance. However, the high polymer cement still has the disadvantages of high cost, short diffusion distance and long setting time, so that development of a dynamic water grouting material with proper price, high fluidity and controllable setting time is urgently needed.
Disclosure of Invention
In order to overcome the problems of insufficient performance and cost in the existing dynamic water grouting material, the invention provides an anti-dispersion clay-sulphoaluminate-based grouting material for dynamic water blocking of a karst tunnel and a preparation method thereof.
The invention aims at realizing the following technical scheme:
the anti-dispersion clay-thioaluminate grouting material for karst tunnel moving water blocking comprises a matrix component and an additive component, wherein:
the matrix comprises, by mass, 70-80% of clay and 20-30% of sulphoaluminate cement;
the additive comprises, by mass, 5-10% of an anti-dispersant, 1-3% of a retarder, 5-10% of a water reducer, 10-20% of a defoamer and 60-78% of a mineral admixture;
the mass ratio of the additive component to the matrix component is 2-3:50.
The preparation method of the anti-dispersion clay-thioaluminate grouting material for karst tunnel moving water blocking comprises the following steps:
step 1, weighing clay and sulphoaluminate cement, and uniformly mixing to obtain a dry powder matrix component;
step 2, respectively weighing an anti-dispersant, a retarder, a water reducing agent, a defoaming agent and a mineral admixture for standby;
step 3, uniformly stirring the water mixed with the anti-dispersant, the retarder and the defoamer until the water is completely decomposed, and controlling the mass ratio of the water to the matrix components to be 0.6-1: 1, preparing a solution A;
and step 4, mixing the dry powder matrix component, the water reducer and the mineral admixture, adding the solution A while stirring, and uniformly stirring to obtain the clay-thioaluminate based anti-dispersion grouting slurry.
In the invention, the clay is the Harbin powder clay, has the advantages of good suspension property, difficult precipitation, certain anti-dispersion property and the like, is low in price, can be taken on site in a construction site, and can greatly reduce grouting cost when being used in a large amount.
In the invention, the sulphoaluminate cement has high setting speed, the compressive strength of 1 day can reach 30MPa, and the sulphoaluminate cement has certain expansion performance.
In the invention, the anti-dispersing agent is hydroxypropyl methyl cellulose, ethylene-vinyl acetate and villus nano hydrogel, and the mass ratio of the anti-dispersing agent to the villus nano hydrogel is 1:2:1. The long-chain structure of the hydroxypropyl methylcellulose adsorbs free water, cement and clay particles, so that agglomeration is increased, and the viscosity of slurry is improved; film-forming polymers can be formed in ethylene-vinyl acetate slurry systems to improve cohesive strength and anti-scouring properties, and in addition, to improve the flexural and tensile bond strength of grouting stones. The villus structure of the villus nano hydrogel ensures that the villus nano hydrogel has super water absorption performance in slurry, and the-COO group can be combined with Ca 2+ The ion chelation forms a crosslinked network, which is favorable for the adhesion of cement particles, thereby improving the anti-scouring performance of cement paste.
In the invention, the hydroxypropyl methylcellulose has the viscosity of 40000 mPa.s, the ethylene-vinyl acetate viscosity of 60 mPa.s, and the villus hydrogel is prepared by copolymerizing acrylic acid and 2-acrylamido-2-methylpropanesulfonic acid in a laboratory.
In the invention, the retarder is boric acid.
In the invention, the water reducer is a polycarboxylate water reducer, and the solid content is 98+/-1%.
In the invention, the defoamer is tributyl phosphate, and the anti-dispersant brings certain air in the slurry preparation process, so that the performance of the slurry calculus is reduced, and the air content of the slurry is reduced by adding tributyl phosphate.
In the invention, the mineral admixture consists of silica fume, gypsum, nano silicon dioxide, sodium carbonate and other mineral materials. The silica fume has high specific surface area, can increase the water retention and dispersion resistance of the slurry, and the gypsum can provide sulfate ions to react with sulfoaluminate cement to generate ettringite, so that the reaction speed and expansion performance of the slurry are improved, and the nano silica can be attached to a reticular structure formed by a high polymer to enable the reticular structure to be more compact, thereby increasing the anti-scouring performance of the slurry. The chemical components of the mineral admixture comprise 12-15% of calcium oxide, 6-8% of aluminum oxide, 35-45% of silicon dioxide, 25-35% of sulfur trioxide, 3-5% of magnesium oxide and 2-4% of ferric oxide.
Compared with the prior art, the invention has the following advantages:
1) The main material of the invention is clay, the main material can be adopted in situ, the cost is low, the environment is protected, the cost is obviously lower than that of the traditional filling material, the economic benefit is good, and the clay has the performances of good suspension property, difficult sedimentation, certain anti-dispersion property and the like.
2) The invention is based on sulphoaluminate cement and clay, hydroxypropyl methyl cellulose, ethylene-vinyl acetate, villus nano hydrogel and mineral admixture are added, the polymer long chain structure increases agglomeration, the slurry viscosity is improved, a film forming polymer can be formed, the cohesive strength and the anti-scouring performance are improved, the villus structure of the hydrogel ensures that the super-strong water absorption performance is realized in the slurry, the anti-scouring performance of the cement slurry is further improved, the mineral admixture improves the slurry performance of a matrix, and superfine particles can be wrapped and adsorbed by a high polymer chain, the cohesiveness of a slurry system is improved, and the thickening effect is realized.
3) According to the invention, the boric acid retarder and the polycarboxylate superplasticizer are added, so that the fluidity of the slurry is improved, and the purpose of controllable slurry setting time can be achieved by controlling the content of the retarder and the mineral admixture.
Detailed Description
The following embodiments are provided to further illustrate the technical scheme of the present invention, but not to limit the technical scheme, and all modifications and equivalent substitutions are included in the scope of the present invention without departing from the spirit and scope of the technical scheme.
Example 1
In this embodiment, the anti-dispersion clay-thioaluminate based grouting material for karst tunnel moving water blocking consists of a matrix component and an additive component, wherein:
the mass ratio of the additive component to the matrix component is 2.5:50;
the matrix component consists of 80% of clay and 20% of sulphoaluminate cement according to mass percentage;
the additive comprises, by mass, 5% of an anti-dispersant, 2% of a retarder, 5% of a water reducer, 15% of a defoamer and 73% of a mineral admixture;
the anti-dispersant is hydroxypropyl methyl cellulose, ethylene-vinyl acetate and villus nano hydrogel, the mass ratio is 1:2:1, the retarder is boric acid, the water reducer is a polycarboxylate water reducer, the defoamer is tributyl phosphate, and the chemical components of the mineral admixture are 15% of calcium oxide, 7% of aluminum oxide, 41% of silicon dioxide, 30% of sulfur trioxide, 4% of magnesium oxide and 3% of ferric oxide;
the preparation method comprises the following specific steps:
and step 1, weighing 80% of clay and 20% of sulphoaluminate cement according to mass percentage, and uniformly mixing to obtain a dry powder matrix component.
Step 2, respectively weighing the following additives according to mass percent: 5% of anti-dispersant, 2% of retarder, 5% of water reducer, 15% of defoamer and 73% of mineral admixture for standby.
Step 3, uniformly stirring the water mixed with the anti-dispersant, the retarder and the defoamer until the water is completely decomposed, and controlling the mass ratio of the water to the matrix components to be 0.8:1, a solution A was prepared.
And step 4, mixing the dry powder matrix component, the water reducer and the mineral admixture, adding the solution A while stirring, and uniformly stirring to obtain the anti-dispersion clay-thioaluminate grouting slurry. The slurries were then tested for 7d compressive strength, initial set time, bleeding rate, running water flush retention of 0.6m/s and funnel viscosity and the specific data are presented in Table 1.
Table 1 grouting slurry properties
Example 2
In this embodiment, the anti-dispersion clay-thioaluminate based grouting material for karst tunnel moving water blocking consists of a matrix component and an additive component, wherein:
the mass ratio of the additive component to the matrix component is 2.5:50;
the matrix component consists of 80% of clay and 20% of sulphoaluminate cement according to mass percentage;
the additive comprises, by mass, 10% of an anti-dispersant, 3% of a retarder, 8% of a water reducer, 15% of a defoamer and 64% of a mineral admixture;
the anti-dispersant is hydroxypropyl methyl cellulose, ethylene-vinyl acetate and villus nano hydrogel, the mass ratio is 1:2:1, the retarder is boric acid, the water reducer is a polycarboxylate water reducer, the defoamer is tributyl phosphate, and the chemical components of the mineral admixture are 13% of calcium oxide, 6% of aluminum oxide, 37% of silicon dioxide, 35% of sulfur trioxide, 5% of magnesium oxide and 4% of ferric oxide;
the preparation method comprises the following specific steps:
and step 1, weighing 80% of clay and 20% of sulphoaluminate cement according to mass percentage, and uniformly mixing to obtain a dry powder matrix component.
Step 2, respectively weighing the following additives according to mass percent: 10% of anti-dispersant, 3% of retarder, 8% of water reducer, 15% of defoamer and 64% of mineral admixture for standby.
Step 3, uniformly stirring the water mixed with the anti-dispersant, the retarder and the defoamer until the water is completely decomposed, and controlling the mass ratio of the water to the matrix components to be 0.8:1, a solution A was prepared.
And step 4, mixing the dry powder matrix component, the water reducer and the mineral admixture, adding the solution A while stirring, and uniformly stirring to obtain the anti-dispersion clay-thioaluminate grouting slurry. The slurries were then tested for 7d compressive strength, initial set time, bleeding rate, running water flush retention of 0.6m/s and funnel viscosity and the specific data are presented in Table 2.
Table 2 grouting slurry properties
Example 3
In this embodiment, the anti-dispersion clay-thioaluminate based grouting material for karst tunnel moving water blocking consists of a matrix component and an additive component, wherein:
the mass ratio of the additive component to the matrix component is 2.5:50;
the matrix component consists of 70% of clay and 30% of sulphoaluminate cement according to mass percentage;
the additive comprises, by mass, 5% of an anti-dispersant, 2% of a retarder, 5% of a water reducer, 15% of a defoamer and 73% of a mineral admixture;
the anti-dispersant is hydroxypropyl methyl cellulose, ethylene-vinyl acetate and villus nano hydrogel, the mass ratio is 1:2:1, the retarder is boric acid, the water reducer is a polycarboxylate water reducer, the defoamer is tributyl phosphate, and the chemical components of the mineral admixture are 14% of calcium oxide, 8% of aluminum oxide, 45% of silicon dioxide, 28% of sulfur trioxide, 3% of magnesium oxide and 2% of ferric oxide;
the preparation method comprises the following specific steps:
and step 1, weighing 70% of clay and 30% of sulphoaluminate cement according to the mass percentage, and uniformly mixing to obtain a dry powder matrix component.
Step 2, respectively weighing the following additives according to mass percent: 5% of anti-dispersant, 2% of retarder, 5% of water reducer, 15% of defoamer and 73% of mineral admixture for standby.
Step 3, uniformly stirring the water mixed with the anti-dispersant, the retarder and the defoamer until the water is completely decomposed, and controlling the mass ratio of the water to the matrix components to be 0.8:1, a solution A was prepared.
And step 4, mixing the dry powder matrix component, the water reducer and the mineral admixture, adding the solution A while stirring, and uniformly stirring to obtain the anti-dispersion clay-thioaluminate grouting slurry. The slurries were then tested for 7d compressive strength, initial set time, bleeding rate, running water flush retention of 0.6m/s and funnel viscosity and the specific data are presented in Table 3.
Table 3 grouting slurry properties
Claims (10)
1. The anti-dispersion clay-thioaluminate grouting material for karst tunnel moving water blocking is characterized by comprising a matrix component and an additive component, wherein:
the matrix comprises, by mass, 70-80% of clay and 20-30% of sulphoaluminate cement;
the additive comprises, by mass, 5-10% of an anti-dispersant, 1-3% of a retarder, 5-10% of a water reducer, 10-20% of a defoamer and 60-78% of a mineral admixture;
the mass ratio of the additive component to the matrix component is 2-3:50.
2. The karst tunnel moving water plugging dispersion-resistant clay-thioaluminate based grouting material of claim 1, wherein the mass ratio of the admixture component to the matrix component is 2.5:50; the matrix component consists of 80% of clay and 20% of sulphoaluminate cement according to mass percentage; the additive comprises, by mass, 5% of an anti-dispersant, 2% of a retarder, 5% of a water reducer, 15% of a defoamer and 73% of a mineral admixture.
3. The karst tunnel moving water plugging dispersion-resistant clay-thioaluminate based grouting material of claim 1, wherein the mass ratio of the admixture component to the matrix component is 2.5:50; the matrix component consists of 80% of clay and 20% of sulphoaluminate cement according to mass percentage; the additive comprises, by mass, 10% of an anti-dispersant, 3% of a retarder, 8% of a water reducer, 15% of a defoamer and 64% of a mineral admixture.
4. The karst tunnel moving water plugging dispersion-resistant clay-thioaluminate based grouting material of claim 1, wherein the mass ratio of the admixture component to the matrix component is 2.5:50; the matrix component consists of 70% of clay and 30% of sulphoaluminate cement according to mass percentage; the additive comprises, by mass, 5% of an anti-dispersant, 2% of a retarder, 5% of a water reducer, 15% of a defoamer and 73% of a mineral admixture.
5. The karst tunnel water-blocking anti-dispersion clay-thioaluminate based grouting material of claim 1, 2, 3 or 4, wherein the anti-dispersion agent is hydroxypropyl methylcellulose, ethylene-vinyl acetate and villus nano hydrogel, and the mass ratio is 1:2:1.
6. The karst tunnel moving water blocking anti-dispersion clay-thioaluminate based grouting material according to claim 1, wherein the retarder is boric acid.
7. The karst tunnel moving water blocking anti-dispersion clay-thioaluminate based grouting material according to claim 1, wherein the water reducing agent is a polycarboxylate water reducing agent.
8. The karst tunnel running water blocking anti-dispersion clay-thioaluminate based grouting material according to claim 1, characterized in that the defoamer is tributyl phosphate.
9. The anti-dispersion clay-thioaluminate grouting material for karst tunnel moving water plugging of claim 1, wherein the chemical components of the mineral admixture are 12-15% of calcium oxide, 6-8% of aluminum oxide, 35-45% of silicon dioxide, 25-35% of sulfur trioxide, 3-5% of magnesium oxide and 2-4% of ferric oxide.
10. A method for preparing the anti-dispersion clay-thioaluminate based grouting material for karst tunnel moving water plugging according to any one of claims 1-9, characterized in that the method comprises the following steps:
step 1, weighing clay and sulphoaluminate cement, and uniformly mixing to obtain a dry powder matrix component;
step 2, respectively weighing an anti-dispersant, a retarder, a water reducing agent, a defoaming agent and a mineral admixture for standby;
step 3, uniformly stirring the water mixed with the anti-dispersant, the retarder and the defoamer until the water is completely decomposed, and controlling the mass ratio of the water to the matrix components to be 0.6-1: 1, preparing a solution A;
and step 4, mixing the dry powder matrix component, the water reducer and the mineral admixture, adding the solution A while stirring, and uniformly stirring to obtain the anti-dispersion clay-thioaluminate grouting slurry.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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