CN116041032A - Double-liquid slurry injection for freezing engineering gushing water and preparation method - Google Patents
Double-liquid slurry injection for freezing engineering gushing water and preparation method Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 87
- 239000002002 slurry Substances 0.000 title claims abstract description 74
- 230000008014 freezing Effects 0.000 title claims abstract description 24
- 238000007710 freezing Methods 0.000 title claims abstract description 24
- 238000002347 injection Methods 0.000 title claims description 8
- 239000007924 injection Substances 0.000 title claims description 8
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 239000000463 material Substances 0.000 claims abstract description 76
- 239000004568 cement Substances 0.000 claims abstract description 62
- 239000010881 fly ash Substances 0.000 claims abstract description 59
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 44
- 239000000440 bentonite Substances 0.000 claims abstract description 44
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 44
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical group [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 43
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 33
- 239000000243 solution Substances 0.000 claims description 68
- 229940092782 bentonite Drugs 0.000 claims description 43
- 238000005303 weighing Methods 0.000 claims description 31
- 238000003756 stirring Methods 0.000 claims description 27
- 230000009977 dual effect Effects 0.000 claims description 23
- 239000000203 mixture Substances 0.000 claims description 23
- 238000001035 drying Methods 0.000 claims description 22
- 238000002156 mixing Methods 0.000 claims description 20
- 239000004115 Sodium Silicate Substances 0.000 claims description 10
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 10
- ONCZQWJXONKSMM-UHFFFAOYSA-N dialuminum;disodium;oxygen(2-);silicon(4+);hydrate Chemical compound O.[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Na+].[Na+].[Al+3].[Al+3].[Si+4].[Si+4].[Si+4].[Si+4] ONCZQWJXONKSMM-UHFFFAOYSA-N 0.000 claims description 9
- 229940080314 sodium bentonite Drugs 0.000 claims description 9
- 229910000280 sodium bentonite Inorganic materials 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 abstract description 9
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 9
- 229910052500 inorganic mineral Inorganic materials 0.000 description 7
- 239000011707 mineral Substances 0.000 description 7
- 238000005266 casting Methods 0.000 description 6
- 229910052697 platinum Inorganic materials 0.000 description 6
- 238000007569 slipcasting Methods 0.000 description 6
- 239000008399 tap water Substances 0.000 description 6
- 235000020679 tap water Nutrition 0.000 description 6
- 239000002689 soil Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 239000011398 Portland cement Substances 0.000 description 4
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- 230000036571 hydration Effects 0.000 description 4
- 238000006703 hydration reaction Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000011056 performance test Methods 0.000 description 4
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 3
- 239000000920 calcium hydroxide Substances 0.000 description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 3
- 239000000378 calcium silicate Substances 0.000 description 3
- 229910052918 calcium silicate Inorganic materials 0.000 description 3
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
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- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
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- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
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- 238000005345 coagulation Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 125000004093 cyano group Chemical group *C#N 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/24—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing alkyl, ammonium or metal silicates; containing silica sols
- C04B28/26—Silicates of the alkali metals
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
-
- 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
Abstract
The invention discloses a double-liquid slurry grouting material for freezing engineering gushing water and a preparation method thereof, wherein the double-liquid slurry grouting material comprises liquid A and liquid B; the solution A and the solution B are uniformly mixed; the component of the solution A is cement, bentonite, fly ash and water; the liquid B is water glass; the scheme utilizes the reaction of the quick-setting cement and the water glass to prepare the double-liquid slurry grouting material for blocking the sudden water surge disaster in the freezing engineering, and has the advantages of quick setting time and high strength; meanwhile, the initial setting time is slightly increased in a low-temperature environment, the strength is slightly reduced, and the plugging requirement of the gushing water disaster in the low-temperature environment can be met.
Description
Technical Field
The invention relates to the technical field of building materials and tunnel engineering, in particular to a double-liquid-slurry grouting solution for blocking a water surge disaster in freezing engineering.
Background
Along with the acceleration of the urban process in China, each large city increasingly pays attention to the development and utilization of underground space. For urban areas of soft soil such as Shanghai, nanjing, guangzhou and the like in China, an artificial stratum freezing method (hereinafter referred to as a freezing method) is commonly used for carrying out soil pretreatment or pre-supporting underground engineering due to high water content and low strength of a soil layer. Research on the freezing engineering disaster process finds that groundwater has the functions of acting and hot erosion on a frozen soil curtain, so that the frozen soil curtain is often damaged by local water leakage, and before the occurrence of the disaster, the construction site is difficult to find and pay attention when the penetration channel is not penetrated or the water yield is small; once the infiltration channel is formed, the water outlet serving as a disaster source is expanded rapidly under the action of flowing groundwater, and the water outlet is easy to develop into a large-area water and sand gushing accident.
Grouting plugging materials are currently classified mainly into chemical slurries and particulate materials. For chemical slurry (such as propyl, cyano, polyurethane, sodium silicate, silica gel and the like), the stability is good, the gel time is easy to control, and the chemical slurry is suitable for treating the gushing water of micro cracks, but the chemical slurry is usually high in price and most of the chemical slurry has toxicity, and the application range is small.
The granular materials can be divided into solid particle filling type water blocking materials (fly ash, sand, gravel, stone dust and the like) and gel particle colloid water blocking materials (cement paste, clay paste, cement-water glass paste and the like), and the granular material has low price, easy material obtaining and wide application. However, the gel particle colloid water plugging material has the problems of overlong final setting time, large slurry curing shrinkage rate and the like. And most of researches are limited to normal temperature at present, and the researches on the performances of various common plugging materials in low-temperature environments, especially in the condition of approaching the freezing point temperature, are relatively lacking.
Therefore, a dual-liquid slurry grouting material capable of realizing the blocking of the surge water disaster in a low-temperature environment is urgently needed.
Disclosure of Invention
Aiming at the problems that the dual-liquid grouting material is high in price and only suitable for blocking sudden water disaster in a normal-temperature environment, the first aim of the invention is to provide the dual-liquid grouting material for freezing project sudden water, and the second aim is to provide a preparation method for preparing the dual-liquid grouting material, so that the dual-liquid grouting material with moderate initial setting time, short final setting time and good fluidity is formed, and the problem that the existing grouting material can not realize sudden water disaster blocking in a low-temperature environment is solved.
In order to achieve the purpose, the double-liquid slurry grouting material for freezing engineering gushing water comprises liquid A and liquid B; the solution A comprises cement, bentonite, fly ash and water; the liquid B comprises water glass; and the solution A and the solution B are uniformly mixed to form double-liquid grouting material.
In some examples of the invention, the liquid a and the liquid B are mixed in a volume ratio of 1:0.4-1:1.
In some examples of the present invention, the liquid a comprises the following components in parts by weight:
in some examples of the invention, the liquid a cement is 42.5 grade quick setting cement.
In some examples of the present invention, the bentonite in the liquid a is sodium bentonite, and the volume expansion factor after water absorption is 15-20 times.
In some examples of the invention, the fly ash in the liquid A is class II fly ash, the screen residue through a 45 μm square hole screen is 15-30%, and the water content is less than 1%.
In some examples of the invention, the water glass in the liquid B is a transparent sodium silicate liquid.
In some examples of the invention, the water glass in liquid B has a modulus of 2.3-3.5 and a baume of 30 ° -51 °.
In order to achieve the above object, the preparation method of the dual-slurry grouting material provided by the invention comprises the following steps:
step 1: mixing cement, bentonite and fly ash according to the proportion to obtain a mixture;
step 2: adding water into the mixture obtained in the step 1 according to the proportion, and fully and uniformly stirring to obtain solution A;
step 3: weighing the solution B according to the volume ratio between the solution A and the solution B;
step 4: and (3) uniformly mixing the solution A and the solution B.
Compared with the prior art, the double-liquid-slurry grouting scheme for freezing engineering gushing water has the following beneficial effects:
(1) The double-liquid slurry grouting material provided by the invention is prepared by utilizing the reaction of the quick-hardening and quick-drying cement and the water glass, and has the advantages of quick setting time and high strength;
(2) The dual-liquid grouting material provided by the invention has a small increase in initial setting time (0-5 ℃) in a low-temperature environment, slightly reduces strength, and can meet the plugging requirement of sudden water surge disasters in the low-temperature environment.
Detailed Description
The invention is further described below with reference to specific examples in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect achieved by the invention easy to understand.
Aiming at the composition of the existing grouting plugging material and the problems existing in the prior grouting plugging material, the inventor provides a double-liquid grouting material for freezing engineering gushing water through creative labor and a large number of experiments, and the double-liquid grouting material is based on quick-setting and quick-drying cement, bentonite, fly ash, water and sodium-based water glass, and realizes the performance of constant setting time and high strength of the double-liquid grouting material in a low-temperature environment by utilizing the characteristics of quick-setting and quick-drying cement, quick-setting and quick-hardening and early-strength; meanwhile, the stability of the slurry is improved based on a highly dispersed lap joint network structure of bentonite in water, and the fluidity of the slurry is improved based on the unique physical characteristics of fly ash; finally, the reaction of the water glass and the calcium hydroxide in the cement hydration product is utilized to shorten and quicken the cement hydration speed and shorten the cement setting and hardening time, and the plugging requirement of the surge water disaster in the low-temperature environment can be effectively met.
Based on the technical mechanism, the double-liquid slurry grouting material for blocking the freezing engineering surge water disaster provided by the invention is formed by uniformly mixing the liquid A and the liquid B; wherein the solution A comprises cement, bentonite, fly ash and water; the liquid B matched with the glass comprises water glass.
In one specific embodiment of the invention, the component in the liquid A in the double-liquid slurry grouting material is as follows in parts by weight:
the quick-hardening and quick-drying cement in the solution A is 100 parts by weight, has the characteristic of quick hardening and quick hardening, and can shorten the setting time of slurry in a low-temperature environment and improve the early strength of grouting materials compared with ordinary Portland cement.
Preferably, the 42.5-grade quick-setting cement in the solution A can shorten the setting time of the slurry and improve the strength of the grouting material.
In addition, the consumption of the 42.5-grade quick-setting cement in the A liquid is preferably 100 parts by weight, so that the best performance of the double-liquid-slurry grouting material can be ensured, and if the proportion of the 42.5-grade quick-setting cement in the double-liquid-slurry grouting material is too low, the slurry setting time can be prolonged, and the strength can be reduced. If the ratio of the 42.5-grade quick-hardening and quick-drying cement of the double-slurry grouting material is too high, the fluidity of the slurry is poor.
The bentonite particles in the solution A have extremely low water permeability after water absorption, so that the formed double-slurry grouting material has good water resistance.
Preferably, the bentonite in the solution A is sodium bentonite, the volume expansion multiple of the bentonite after water absorption is 15-20 times, and the slurry stability can be effectively improved, the slurry grouting effect can be improved, and the waterproofness of the double-liquid slurry grouting can be improved by matching with the dosage of 15-30 parts by weight.
The fly ash in the liquid A can play a role in filling, and meanwhile, the flow property of the double-liquid slurry injection can be improved.
Preferably, the fly ash in the solution A is class II fly ash, the residue of the fly ash passing through a 45 mu m square hole sieve is 15-30%, the water content is less than 1%, and the fluidity of slurry can be increased by adopting the fly ash.
In addition, the dosage of the II-level fly ash in the A liquid is preferably 40-60 parts by weight, so that the optimal fluidity of the double-liquid slurry injection can be ensured when the two-liquid slurry injection is cooperated with other components; if the proportion of the fly ash of the double-liquid grouting material is too low, the fluidity of the slurry is poor. If the proportion of the fly ash of the double-slurry grouting material is too high, the strength is reduced, and the setting time is prolonged.
The specific dosage of water in the solution A satisfies the weight ratio of water/(cement + bentonite + fly ash) to be 1:1-3:1. By adopting the water quantity, the formed dual-liquid grouting material has moderate initial setting time and strength when being cooperated with other components. If the water consumption of the dual-slurry grouting material is too low, the slurry fluidity is deteriorated. If the water consumption of the dual-liquid grouting material is too high, the slurry setting time is prolonged, and the strength is reduced.
In one embodiment of the present invention, the water glass constituting the liquid B in the dual slurry is specifically a transparent sodium silicate liquid. The water glass reacts with calcium hydroxide in the cement hydration product to generate gel hydrated calcium silicate with certain strength, so that the cement hydration speed can be increased, and the cement setting and hardening time can be shortened.
Preferably, the water glass in the liquid B has a modulus of 2.3-3.5 and a Baume degree of 30-51 degrees. When the water glass is adopted to cooperate with other components, the initial setting time and the strength of the formed double-liquid-slurry grouting material are moderate.
In one specific embodiment of the present invention, the volume ratio of the solution A to the solution B in the dual slurry grouting material is preferably 1:0.4-1:1. When the double-liquid grouting material formed by adopting the mixture ratio of the liquid A and the liquid B is adopted, the initial setting time and the strength of the double-liquid grouting material are moderate, and if the proportion of the liquid B of the double-liquid grouting material is too low, the strength is reduced. If the proportion of the B liquid of the double-liquid grouting material is too high, the initial setting time can be prolonged.
The control of the coagulation time can be realized by adjusting the proportion of water glass in the double-liquid-slurry grouting material; the fly ash in the double-slurry grouting material can enhance the fluidity of slurry; the quick hardening and quick drying cement in the double-liquid grouting material has the characteristics of quick setting time and high early strength, and can be suitable for a low-temperature environment and enable the double-liquid grouting material to reach higher strength.
The invention further provides a corresponding preparation scheme aiming at the double-liquid slurry grouting material for blocking the sudden water disaster in the freezing engineering.
The preparation scheme comprises the components of cement, bentonite, fly ash, water glass and the like based on the formula, and the whole preparation process mainly comprises the following steps:
step 1: according to the weight portions of the formula, weighing cement, bentonite, fly ash and water, mixing the weighed cement, bentonite and fly ash, and stirring for 60-90s at the rotating speed of 120-150r/min to obtain a mixture. After stirring in this step, cement, bentonite and fly ash can be uniformly mixed.
Step 2: and (3) adding the water weighed in the step (1) into the mixture obtained in the step (1), and stirring at the rotating speed of 200-250r/min for 60-90s to obtain the solution A. After stirring in the step, the uniformly mixed solution A can be obtained, and the caking phenomenon is not easy to occur.
Step 3: and (3) weighing the water glass of the liquid B according to the volume ratio of the liquid A to the liquid B determined by the proportion.
Step 4: and (3) uniformly mixing the solution A and the solution B.
Thus, after the liquid water glass is added into the cement slurry, silicate ions in the water glass react with calcium ions in the cement slurry to generate hydrated calcium silicate gel, calcium hydroxide is further separated from calcium silicate minerals in the cement until the reaction of the side with less consumption is completed, and a solidified stone body is formed; meanwhile, the bentonite particles have extremely low water permeability after absorbing water, so that the bentonite particles have good water resistance; the fly ash plays a role in filling, and meanwhile, the flow property of the grouting material can be improved.
The invention will be further illustrated with reference to specific examples. It is to be understood that these examples are illustrative of the present invention and are not intended to limit the scope of the present invention. The experimental procedures, which are not specified in the following examples, are generally determined according to national standards. If the corresponding national standard does not exist, the method is carried out according to the general international standard, the conventional condition or the condition recommended by the manufacturer.
Unless defined or otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. In addition, any method and material similar or equivalent to those described may be used in the methods of the present invention.
Example 1:
in this example, components such as quick hardening and quick drying cement, bentonite, fly ash, water glass and the like are adopted.
Wherein the quick hardening and quick drying cement is the grade 42.5 quick hardening and quick drying cement of the Henan Kaika; the bentonite is 325 mesh sodium bentonite of Hebei Xin Cheng mineral product; the fly ash is class II fly ash produced by Henan deng seal; the water is tap water; the water glass is sodium silicate liquid with a modulus of 2.68 and a Baume degree of 47.2 degrees, which is produced by Henan platinum casting materials Co.
Accordingly, a dual slurry slip casting was prepared in this example by the following steps:
(1) And (3) preparing a solution A: weighing and mixing quick-setting cement, bentonite and fly ash according to the weight ratio of 100:25:50, and stirring for 60-90s at the rotating speed of 120-150r/min to obtain a mixture; weighing water according to the ratio of water/(cement + bentonite + fly ash) of 1:1;
(2) Adding water in the step (1) into the mixture in the step (1), and stirring for 60-90s at the rotating speed of 200-250r/min to obtain a solution A;
(3) Weighing the solution B: weighing the volume of the liquid A in the step (1), and weighing the liquid B according to the volume ratio of the liquid A to the liquid B of 1:0.6;
(4) Preparing double-liquid grouting material: mixing and stirring the solution A prepared in the step (1) and the solution B weighed in the step (2) for 10-20s.
Accordingly, the present example produced a dual slurry grouting material 1.
Example 2:
in this example, cement, bentonite, fly ash, water glass and other components are used.
Wherein the quick hardening and quick drying cement is the grade 42.5 quick hardening and quick drying cement of the Henan Kaika; the bentonite is 325 mesh sodium bentonite of Hebei Xin Cheng mineral product; the fly ash is class II fly ash; the water is tap water; the water glass is sodium silicate liquid with a modulus of 2.68 and a Baume degree of 47.2 degrees, which is produced by Henan platinum casting materials Co.
Accordingly, a dual slurry slip casting was prepared in this example by the following steps:
(1) And (3) preparing a solution A: weighing and mixing cement, bentonite and fly ash according to the weight ratio of 100:25:50, and stirring for 60-90s at the rotating speed of 120-150r/min to obtain a mixture; water/(cement + bentonite + fly ash) is 1.5:1;
(2) Adding water in the step (1) into the mixture in the step (1), and stirring for 60-90s at the rotating speed of 200-250r/min to obtain a solution A;
(3) Weighing the solution B: weighing the volume of the liquid A in the step (1), and weighing the liquid B according to the volume ratio of the liquid A to the liquid B of 1:0.8;
(4) Preparing double-liquid grouting material: mixing and stirring the solution A prepared in the step (1) and the solution B weighed in the step (2) for 10-20s.
Accordingly, the present example produced a two-fluid grouting material 2.
Example 3:
in this example, cement, bentonite, fly ash, water glass and other components are used.
Wherein the quick hardening and quick drying cement is the grade 42.5 quick hardening and quick drying cement of the Henan Kaika; the bentonite is 325 mesh sodium bentonite of Hebei Xin Cheng mineral product; the fly ash is class II fly ash; the water is tap water; the water glass is sodium silicate liquid with a modulus of 2.68 and a Baume degree of 47.2 degrees, which is produced by Henan platinum casting materials Co.
Accordingly, a dual slurry slip casting was prepared in this example by the following steps:
(1) And (3) preparing a solution A: weighing and mixing cement, bentonite and fly ash according to the weight ratio of 100:25:50, and stirring for 60-90s at the rotating speed of 120-150r/min to obtain a mixture; weighing water according to the ratio of water/(cement + bentonite + fly ash) of 2:1;
(2) Adding water in the step (1) into the mixture in the step (1), and stirring for 60-90s at the rotating speed of 200-250r/min to obtain a solution A;
(3) Weighing the solution B: weighing the volume of the liquid A in the step (1), and according to the volume ratio of the liquid A to the liquid B of 1:1;
(4) Preparing double-liquid grouting material: mixing and stirring the solution A prepared in the step (1) and the solution B weighed in the step (2) for 10-20s.
Accordingly, the present example produced a dual slurry grouting material 3.
Based on the three examples described above, three comparative examples are further provided herein, which employ specific formulations different from those in the schemes of the present application, specifically as follows:
comparative example 1:
in this example, components such as ordinary Portland cement, bentonite, fly ash, water glass and the like are adopted.
Wherein the quick hardening and quick drying cement is the grade 42.5 quick hardening and quick drying cement of the Henan Kaika; the bentonite is 325 mesh sodium bentonite of Hebei Xin Cheng mineral product; the fly ash is class II fly ash; the water is tap water; the water glass is sodium silicate liquid with a modulus of 2.68 and a Baume degree of 47.2 degrees, which is produced by Henan platinum casting materials Co.
Accordingly, a dual slurry slip casting was prepared in this example by the following steps:
(1) And (3) preparing a solution A: weighing and mixing ordinary Portland cement, bentonite and fly ash according to the weight ratio of 100:25:50, and stirring for 60-90s at the rotating speed of 120-150r/min to obtain a mixture; water/(Portland cement + bentonite + fly ash) is 1:1 weighed;
(2) Adding water in the step (1) into the mixture in the step (1), and stirring for 60-90s at the rotating speed of 200-250r/min to obtain a solution A;
(3) Weighing the solution B: weighing the volume of the liquid A in the step (1), and weighing the liquid B according to the volume ratio of the liquid A to the liquid B of 1:0.6;
(4) Preparing double-liquid grouting material: mixing and stirring the solution A prepared in the step (1) and the solution B weighed in the step (2) for 10-20s.
Accordingly, the present example produced a dual slurry grouting material 4.
Comparative example 2:
in this example, components such as quick hardening and quick drying cement, bentonite, fly ash, water glass and the like are adopted.
Wherein the quick hardening and quick drying cement is the grade 42.5 quick hardening and quick drying cement of the Henan Kaika; the bentonite is 325 mesh sodium bentonite of Hebei Xin Cheng mineral product; the fly ash is class II fly ash; the water is tap water; the water glass is sodium silicate liquid with a modulus of 2.68 and a Baume degree of 47.2 degrees, which is produced by Henan platinum casting materials Co.
Accordingly, a dual slurry slip casting was prepared in this example by the following steps:
(1) And (3) preparing a solution A: weighing and mixing quick-setting cement, bentonite and fly ash according to the weight ratio of 100:20:80, and stirring for 60-90s at the rotating speed of 120-150r/min to obtain a mixture; weighing water according to the ratio of water/(cement + bentonite + fly ash) of 1:1;
(2) Adding water in the step (1) into the mixture in the step (1), and stirring for 60-90s at the rotating speed of 200-250r/min to obtain a solution A;
(3) Weighing the solution B: weighing the volume of the liquid A in the step (1), and weighing the liquid B according to the volume ratio of the liquid A to the liquid B of 1:0.6;
(4) Preparing double-liquid grouting material: mixing and stirring the solution A prepared in the step (1) and the solution B weighed in the step (2) for 10-20s.
Accordingly, the present example produced a dual slurry grouting material 5.
Comparative example 3:
in this example, components such as quick hardening and quick drying cement, bentonite, fly ash, water glass and the like are adopted.
Wherein the quick hardening and quick drying cement is the grade 42.5 quick hardening and quick drying cement of the Henan Kaika; the bentonite is 325 mesh sodium bentonite of Hebei Xin Cheng mineral product; the fly ash is class II fly ash; the water is tap water; the water glass is sodium silicate liquid with a modulus of 2.68 and a Baume degree of 47.2 degrees, which is produced by Henan platinum casting materials Co.
Accordingly, a dual slurry slip casting was prepared in this example by the following steps:
(1) And (3) preparing a solution A: weighing and mixing quick-setting cement, bentonite and fly ash according to the weight ratio of 100:25:50, and stirring for 60-90s at the rotating speed of 120-150r/min to obtain a mixture; weighing water according to the ratio of water/(cement + bentonite + fly ash) of 1:1;
(2) Adding water in the step (1) into the mixture in the step (1), and stirring for 60-90s at the rotating speed of 200-250r/min to obtain a solution A;
(3) Weighing the solution B: weighing the volume of the liquid A in the step (1), and weighing the liquid B according to the volume ratio of the liquid A to the liquid B of 1:2;
(4) Preparing double-liquid grouting material: mixing and stirring the solution A prepared in the step (1) and the solution B weighed in the step (2) for 10-20s.
Accordingly, the present example produced a dual slurry grouting material 6.
Here, the two-fluid grouting materials 1 to 6 prepared in examples 1 to 3 and comparative examples 1 to 3 were respectively tested for performance.
The performance tests performed here include initial set time and 28d compressive strength of the dual slurry grouting material at low and low temperatures.
Wherein, the normal temperature condition is 20 ℃ and is provided by a concrete standard curing room, and the low temperature condition is 2 ℃ and is provided by a refrigerator capable of setting target temperature.
The initial setting time testing method comprises the following steps: and respectively placing the solution A and the solution B in two beakers, pouring the solution A into the solution B beaker, starting timing and stirring for 10s, and repeatedly and alternately pouring the two beakers after stirring until the beakers are inclined by 45 degrees and the slurry cannot flow, wherein the time is the gel time.
The 28d compressive strength test method comprises the following steps: and (3) mixing and stirring the solution A and the solution B uniformly, immediately pouring the mixture into a 70.7mm multiplied by 70.7mm mould, demoulding after 24 hours, curing at a target temperature, and carrying out a compressive strength test at a loading rate of 1mm/min when the mixture reaches 28 d.
Here, the initial setting time and 28d compressive strength performance test results of the two-liquid grouting materials 1 to 3 prepared in examples 1 to 3 and the two-liquid grouting materials 4 to 6 prepared in comparative examples 1 to 3 are shown in Table 1:
TABLE 1 Dual slurry grouting performance test results
The performance test results according to table 1 show that the dual-liquid grouting materials prepared in examples 1 and 2 are far better than the dual-liquid grouting materials prepared in comparative example 1, comparative example 2 and comparative example 3 in normal temperature initial setting time, low temperature initial setting time, normal temperature 28d compressive strength and low temperature 28d compressive strength, and unexpected technical effects are achieved.
According to the embodiment, the double-liquid slurry grouting material for the water inrush of the freezing engineering provided by the scheme has the advantages of quick setting time, high strength, small increase of initial setting time in a low-temperature environment and slight decrease of strength, can meet the water inrush disaster plugging requirement in the low-temperature environment, and can be used for preventing and treating the water inrush problem of the artificial freezing engineering, the plateau cold area tunnel and the season freezing area tunnel.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. The double-liquid slurry grouting material for freezing engineering gushing water is characterized by comprising liquid A and liquid B; the solution A comprises cement, bentonite, fly ash and water; the liquid B comprises water glass; and the solution A and the solution B are uniformly mixed to form double-liquid grouting material.
2. The dual slurry injection for freezing engineering surge water of claim 1, wherein the volume ratio of the liquid a to the liquid B is 1:0.4-1:1.
3. The dual slurry grouting material for freezing engineering surge water according to claim 1 or 2, wherein the liquid a comprises the following components in parts by weight:
4. the dual slurry grouting material for freezing engineering surge water of claim 3, wherein the cement in the A liquid is 42.5 grade quick setting quick drying cement.
5. The dual slurry grouting material for freezing engineering surge water according to claim 3, wherein the bentonite in the A liquid is sodium bentonite, and the volume expansion multiple after water absorption is 15-20 times.
6. The dual slurry grouting material for frozen engineering surge water according to claim 3, wherein the fly ash in the A liquid is class II fly ash, the screen residue of the fly ash passing through a 45 μm square hole screen is 15-30%, and the water content is less than 1%.
7. The dual slurry injection for freezing engineering surge water of claim 1, wherein the water glass in solution B is a transparent sodium silicate liquid.
8. The dual slurry injection for frozen engineering surge water of claim 1 or 7, wherein the water glass modulus in the B liquid is 2.3-3.5 and the baume degree is 30 ° -51 °.
9. A method of preparing a dual slurry according to any one of claims 1 to 8, comprising:
step 1: mixing cement, bentonite and fly ash according to the proportion to obtain a mixture;
step 2: adding water into the mixture obtained in the step 1 according to the proportion, and fully and uniformly stirring to obtain solution A;
step 3: weighing the solution B according to the volume ratio between the solution A and the solution B;
step 4: and (3) uniformly mixing the solution A and the solution B.
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| CN113943130A (en) * | 2021-10-11 | 2022-01-18 | 河海大学 | Formula and grouting process of shield tunnel timed-setting wall-grouting material |
| CN114380569A (en) * | 2022-01-24 | 2022-04-22 | 中铁第一勘察设计院集团有限公司 | Grouting slurry and grouting method for soft rock tunnel |
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2023
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH07291703A (en) * | 1994-04-18 | 1995-11-07 | Chichibu Onoda Cement Corp | Backfillgrouting material |
| JPH09118881A (en) * | 1995-10-25 | 1997-05-06 | Chichibu Onoda Cement Corp | Slurry addition material |
| CN1469012A (en) * | 2002-07-19 | 2004-01-21 | 岩 李 | Serial motor for fasting treating piping, sandy soil liquefaction and leakage of underwater structure |
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