CN114573278A - Shield grouting material and preparation method thereof - Google Patents
Shield grouting material and preparation method thereof Download PDFInfo
- Publication number
- CN114573278A CN114573278A CN202210289711.XA CN202210289711A CN114573278A CN 114573278 A CN114573278 A CN 114573278A CN 202210289711 A CN202210289711 A CN 202210289711A CN 114573278 A CN114573278 A CN 114573278A
- Authority
- CN
- China
- Prior art keywords
- parts
- grouting material
- shield grouting
- shield
- agent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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
-
- 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/44—Thickening, gelling or viscosity increasing agents
-
- 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
- C04B2111/00663—Uses not provided for elsewhere in C04B2111/00 as filling material for cavities or the like
- C04B2111/00672—Pointing or jointing materials
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- 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
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The application relates to the field of building materials, and particularly discloses a shield grouting material and a preparation method thereof; the shield grouting material comprises the following raw materials in parts by weight: 80-120 parts of cement, 300 parts of fly ash 180-containing materials, 350 parts of sand 200-containing materials, 50-80 parts of bentonite, 2-4 parts of thickening agent, 0.5-1.5 parts of expanding agent and 0.5-3 parts of water reducing agent; the thickening agent comprises silica fume, hydroxypropyl methyl cellulose and diallyl phthalate; the shield grouting material prepared by the application has a high coagulation speed.
Description
Technical Field
The application relates to the field of building materials, in particular to a shield grouting material and a preparation method thereof.
Background
The shield grouting material is a synchronous grouting material used for filling a building gap between a tunnel body and a segment ring in subway shield construction, and has the effects of preventing surface subsidence, stabilizing segments and preventing segment deviation. The primary function of the grouting material is to fill the voids, stabilize the segments, and prevent surface subsidence and segment migration.
The shield grouting material is subjected to several stages of original inert grouting materials, cement-based active grouting materials, chemical grouting materials, modern modified grouting materials and the like, and different grouting materials can be selected according to different geological conditions and economic benefits through continuous updating and updating.
However, the grouting material is not suitable for a water-rich stratum with a large permeability coefficient, and when shield construction is carried out, the water-rich stratum can be diluted by underground water after being injected by the traditional grouting material, so that an expected synchronous grouting effect cannot be achieved, and particularly under the condition of high water pressure, the grouting material is more easily diluted, so that the material structure is damaged, and the grouting material cannot be quickly condensed.
Disclosure of Invention
In order to improve the coagulation speed of the shield grouting material, the application provides the shield grouting material and the preparation method thereof.
In a first aspect, the application provides a shield grouting material, which adopts the following technical scheme:
the shield grouting material comprises the following raw materials in parts by weight: 80-120 parts of cement, 300 parts of fly ash 180-; the thickening agent comprises silica fume, hydroxypropyl methyl cellulose and diallyl phthalate.
Through adopting above-mentioned technical scheme, add thickener and expanding agent in the shield slip casting material of this application, the shield slip casting material coagulation rate of making improves to some extent. The thickening agent added into the shield grouting material can greatly improve the water dispersibility resistance of the shield grouting material, reduce the bleeding rate and the layering degree of the material, improve the stability of the material and improve the comprehensive performance of the material; the silica fume in the thickening agent is amorphous spherical particles, the surface is smooth, the specific surface area is large, the activity is high, the tiny spherical particles can play a role in lubrication and have extremely strong cementing power, and the silica fume not only has a tackifying function, but also can improve the compressive strength of a grouting material; the dispersibility of cement-sand is improved, and the plasticity and water-retaining property of the mortar material are greatly improved, so that the coagulation speed of the grouting material can be improved, the cement strength can be enhanced, and the effect of reducing the generation of cracks is reduced; the expanding agent in the shield grouting material generates a product with enlarged volume through a hydration reaction with cement and water in the grouting material, so that the volume expansion of the slurry of the shield grouting material is caused, chemical shrinkage generated when the cement is hydrated and dry shrinkage generated by free water loss are offset, the shield grouting material is filled more fully, and meanwhile, the coagulation speed of the shield grouting material is improved.
Preferably, the shield grouting material comprises the following raw materials in parts by weight: 90-110 parts of cement, 220-280 parts of fly ash, 250-300 parts of sand, 60-70 parts of bentonite, 2.5-3.5 parts of thickening agent, 0.8-1.2 parts of expanding agent and 1-2 parts of water reducing agent.
By adopting the technical scheme, the use amount of each raw material of the shield grouting material is optimized, so that when the use amount of the shield grouting material is in the range, the coagulation speed, the compressive strength and the water dispersibility of the prepared shield grouting material are improved to some extent.
Preferably, the thickener comprises the following components in parts by weight: 5-15 parts of silica fume, 0.5-1 part of hydroxypropyl methyl cellulose and 2-4 parts of diallyl phthalate.
By adopting the technical scheme, the silica fume, the hydroxypropyl methyl cellulose and the diallyl phthalate are compounded according to the using amount to obtain the thickening agent, and then the thickening agent is used in the preparation process of the shield grouting material, so that the coagulation speed of the shield grouting material is improved.
Preferably, the hydroxypropyl methylcellulose has an average particle size of 80-100 mesh.
By adopting the technical scheme, the coagulation time of the finally prepared shield grouting material is shortened by limiting the average particle size of the hydroxypropyl methyl cellulose, and the performance of the shield grouting material has no obvious difference when the average particle size of the hydroxypropyl methyl cellulose is within the range.
Preferably, the expanding agent comprises the following components in parts by weight: 5-10 parts of calcium sulphoaluminate, 4-8 parts of calcium oxide and 4-6 parts of magnesium oxide.
By adopting the technical scheme, the expanding agent is obtained by compounding calcium sulphoaluminate, calcium oxide and magnesium oxide according to a certain proportion, and after being added into cement, the calcium sulphoaluminate expanding agent is hydrated with cement minerals or reacts with cement hydration products to form trisulfide hydrated calcium sulphoaluminate, so that the solid phase volume is greatly increased, and the apparent volume is expanded; the expansion effect of the calcium oxide and magnesium oxide expanding agents is mainly characterized in that calcium oxide crystals and magnesium oxide crystals are hydrated to form calcium hydroxide crystals and magnesium hydroxide crystals, so that the volume expansion is caused; when the weight parts of the calcium sulphoaluminate, the calcium oxide and the magnesium oxide are within the range, the performance of the prepared shield grouting material has no obvious difference.
Preferably, the expanding agent further comprises 2-4 parts by weight of gypsum.
By adopting the technical scheme, the main component of the gypsum is the hydrate of calcium sulfate, a certain amount of gypsum is added into the expanding agent, the hydration of anhydrous calcium sulphoaluminate in the self composition participates in the hydration of cement minerals or reacts with cement hydration products to form trisulfide type hydrated calcium sulphoaluminate (ettringite), the generation of an ettringite phase increases the volume of a solid phase greatly to cause the apparent volume expansion, and meanwhile, the strength of the shield grouting material can be enhanced to a certain degree.
Preferably, the water reducing agent is a polycarboxylic acid high-performance water reducing agent.
By adopting the technical scheme, the polycarboxylic acid high-performance water reducing agent has the characteristics of high water reducing rate and good dispersibility, and can obviously improve the fluidity of the shield grouting material.
In a second aspect, the present application provides a method for preparing a shield grouting material, which adopts the following technical scheme:
a preparation method of a shield grouting material comprises the following steps:
1) uniformly mixing the silica fume, the hydroxypropyl methyl cellulose and the diallyl phthalate to obtain a thickening agent;
2) uniformly mixing calcium sulphoaluminate, calcium oxide and magnesium oxide to obtain an expanding agent;
3) and adding the thickening agent and the expanding agent into cement, fly ash, sand, bentonite and a water reducing agent, and uniformly mixing to obtain the shield grouting material.
By adopting the technical scheme, the shield grouting material is uniformly mixed according to a certain sequence, so that the thickening agent and the expanding agent are uniformly dispersed in the grouting material, and the prepared shield grouting material has higher coagulation capacity.
In summary, the present application has the following beneficial effects:
1. the thickening agent and the expanding agent are added into the shield grouting material, so that the coagulation speed of the prepared shield grouting material is improved. The thickening agent added into the shield grouting material can greatly improve the water dispersibility resistance of the shield grouting material, reduce the bleeding rate and the layering degree of the material, improve the stability of the material and improve the comprehensive performance of the material; the silica fume in the thickening agent is amorphous spherical particles, the surface is smooth, the specific surface area is large, the activity is high, the tiny spherical particles can play a role in lubrication and have extremely strong cementing power, and the silica fume not only has a tackifying function, but also can improve the compressive strength of a grouting material; the dispersibility of cement-sand is improved, the plasticity and water retention of the mortar material are greatly improved, and the mortar material has the effects of enhancing the cement strength and reducing the generation of cracks; the expanding agent in the shield grouting material generates a product with enlarged volume through a hydration reaction with cement and water in the grouting material, so that the volume expansion of the slurry of the shield grouting material is caused, chemical shrinkage generated when the cement is hydrated and dry shrinkage generated by free water loss are offset, the shield grouting material is filled more fully, and the coagulation speed of the shield grouting material can be improved.
2. The expanding agent is obtained by compounding calcium sulphoaluminate, calcium oxide and magnesium oxide according to a certain proportion, and the calcium sulphoaluminate expanding agent is added into cement and then is hydrated with cement minerals or reacts with cement hydration products to form trisulfide hydrated calcium sulphoaluminate, so that the volume of a solid phase is greatly increased, and the apparent volume is expanded; the expansion effect of the calcium oxide and magnesium oxide expansion agents is mainly caused by the fact that calcium oxide crystals and magnesium oxide crystals are hydrated to form calcium hydroxide crystals and magnesium hydroxide crystals, and volume expansion is caused.
3. Through detection, the finally measured coagulation time of the shield grouting material prepared in the application can be shortened to 8.5h, the consistency of the material is 118mm, the fluidity is 271mm, and the 28d land-water strength ratio is 0.98%.
Detailed Description
The present application will be described in further detail with reference to examples.
Raw materials
Cement: the manufacturer is Beijing Jie's An architecture Co., Ltd;
fly ash: the manufacturer is a flying stone processing factory in the red bridge area of Tianjin;
bentonite: the manufacturer is Hebei mineral products Limited;
silica fume: the manufacturer is Hebei province Gaokang mineral products Limited company; hydroxypropyl methylcellulose: the manufacturer is Shandong Qingyi Xin chemical technology company; diallyl phthalate: the manufacturer is Jinan Zi' an chemical company, Ltd;
Calcium sulfoaluminate: the manufacturer is Tangshan polar bear building materials Co., Ltd; calcium oxide: the manufacturer is Beijing Yulu building engineering Co., Ltd; magnesium oxide: the manufacturer is Shanghai Kaiyn chemical Co., Ltd; gypsum: the manufacturer is Shanghai Guanlin building materials Co., Ltd;
polycarboxylic acid high-performance water reducing agent: the pH value is 8.92, and the manufacturer is Shandong bock chemical Co.
Preparation example
Preparation examples 1 to 3
The thickeners of preparation examples 1 to 3, which are shown in Table 1, were prepared by the following steps:
weighing the raw materials according to the dosage in the table 1, and then uniformly stirring the raw materials to obtain the thickening agent.
TABLE 1 thickening agents of preparation examples 1-3 and the amounts (kg) of the respective materials
| Preparation example 1 | Preparation example 2 | Preparation example 3 | |
| Silica fume | 5 | 10 | 15 |
| Hydroxypropyl methylcellulose | 1 | 0.8 | 0.5 |
| Diallyl phthalate | 2 | 3 | 4 |
Preparation examples 4 to 6
The swelling agent of preparation examples 4 to 6, whose raw materials and amounts of the raw materials are shown in Table 2, was prepared by the following steps:
weighing the raw materials according to the dosage in the table 2, and then uniformly stirring the raw materials to obtain the expanding agent.
TABLE 2 preparation examples 4-6 of swelling agent and amounts (kg) of the respective materials
| Preparation example 4 | Preparation example 5 | Preparation example 6 | |
| Aluminium calcium sulfate | 5 | 8 | 10 |
| Calcium oxide | 8 | 6 | 4 |
| Magnesium oxide | 4 | 5 | 6 |
Examples
Examples 1 to 4
The shield grouting material of the embodiment 1-4 has the following raw materials and the dosage of the raw materials shown in the table 3, and the preparation steps are as follows:
1) uniformly mixing the silica fume, the hydroxypropyl methyl cellulose and the diallyl phthalate to obtain a thickening agent;
2) uniformly mixing calcium sulphoaluminate, calcium oxide and magnesium oxide to obtain an expanding agent;
3) and adding the thickening agent and the expanding agent into cement, fly ash, sand, bentonite and a water reducing agent, and uniformly mixing to obtain the shield grouting material.
Wherein the thickening agent is from preparation example 1, the swelling agent is from preparation example 4, the average particle size of the hydroxypropyl methyl cellulose is 80 meshes, and the water reducing agent is a polycarboxylic acid high-performance water reducing agent.
TABLE 3 raw materials and amounts (kg) of raw materials of examples 1-4
| Example 1 | Example 2 | Example 3 | Example 4 | |
| Cement | 80 | 90 | 110 | 120 |
| Fly ash | 300 | 280 | 220 | 180 |
| Sand | 200 | 250 | 300 | 350 |
| Bentonite clay | 80 | 70 | 60 | 50 |
| Thickening agent | 2 | 2 | 2 | 2 |
| Expanding agent | 0.5 | 0.8 | 1.2 | 1.5 |
| Water reducing agent | 3 | 2 | 1 | 0.5 |
Example 5
A shield grouting material is different from the shield grouting material in example 3 in that the thickening agent added is from preparation example 2, and the rest steps are the same as those of example 3.
Example 6
A shield grouting material is different from the shield grouting material in example 3 in that the thickening agent added is from preparation example 3, and the rest steps are the same as those in example 3.
Example 7
The shield grouting material is different from the shield grouting material in the embodiment 5 in that the average particle size of hydroxypropyl methyl cellulose in the thickening agent is 100 meshes, and the rest steps are the same as the embodiment 5.
Example 8
The shield grouting material is different from the shield grouting material in example 7 in that the addition amount of the thickening agent is 2.5kg, and the rest steps are the same as those in example 7.
Example 9
A shield grouting material is different from the shield grouting material in the embodiment 7 in that the addition amount of a thickening agent is 3.5kg, and the rest steps are the same as the embodiment 7.
Example 10
A shield grouting material is different from the shield grouting material in example 7 in that the addition amount of a thickening agent is 4kg, and the rest steps are the same as those of example 7.
Example 11
A shield grouting material is different from the shield grouting material in example 10 in that an expanding agent is added from preparation example 5, and the rest steps are the same as those of example 10.
Example 12
A shield grouting material is different from the shield grouting material in example 10 in that an expanding agent is added from preparation example 6, and the rest steps are the same as those of example 10.
Example 13
A shield grouting material is different from the shield grouting material in the embodiment 11 in that 2kg of gypsum is added in an expanding agent, and the rest steps are the same as the embodiment 11.
Example 14
A shield grouting material is different from the shield grouting material in the embodiment 11 in that 3kg of gypsum is added in an expanding agent, and the rest steps are the same as the embodiment 11.
Example 15
A shield grouting material is different from the shield grouting material in the embodiment 11 in that 4kg of gypsum is added in an expanding agent, and the rest steps are the same as the embodiment 11.
Comparative example
Comparative example 1
The shield grouting material is different from the shield grouting material in the embodiment 1 in that the addition amount of the thickening agent is 0, and the rest steps are the same as the embodiment 1.
Comparative example 2
The shield grouting material is different from the shield grouting material in the embodiment 1 in that the addition amount of the silica fume in the thickening agent is 0, and the rest steps are the same as the embodiment 1.
Comparative example 3
The shield grouting material is different from the shield grouting material in the embodiment 1 in that the addition amount of hydroxypropyl methyl cellulose in the thickening agent is 0, and the rest steps are the same as the embodiment 1.
Comparative example 4
A shield grouting material is different from the shield grouting material in the embodiment 1 in that the addition amount of diallyl phthalate in a thickening agent is 0, and the rest steps are the same as the embodiment 1.
Performance test
Detection method/test method
The shield grouting materials were prepared according to the preparation methods of the shield grouting materials of examples 1 to 15 and comparative examples 1 to 4, and then tested according to the following test methods, and the test results are shown in table 4.
And (3) testing the thickness of the slurry: according to JGJ70-90 'test method for basic performance of building mortar', a mortar consistometer is adopted for testing.
Testing the flowing property of the slurry: according to GB/T2419-2005 'method for determining fluidity of cement mortar', a cement mortar fluidity tester is adopted.
And (3) testing the setting time of the slurry: the test is carried out by adopting a mortar setting time tester according to JGJ70-90 'test method for basic performance of building mortar'.
Testing the layering degree: refer to JGJ70-90 basic performance test method of building mortar.
And (3) testing the bleeding rate: refer to JGJ70-90 basic performance test method of building mortar.
TABLE 4 test results of examples 1 to 15 and comparative examples 1 to 4
| Consistency/mm | Fluidity/mm | Coagulation time/h | Degree of delamination/mm | Bleeding rate/% | 28d land strength ratio/%) | |
| Example 1 | 100 | 236 | 12.3 | 1 | 0.2 | 0.79 |
| Example 2 | 100 | 235 | 12.2 | 1 | 0.2 | 0.78 |
| Example 3 | 102 | 242 | 11.9 | 0 | 0.1 | 0.82 |
| Example 4 | 101 | 240 | 12.0 | 1 | 0.2 | 0.79 |
| Example 5 | 104 | 248 | 11.4 | 0 | 0.1 | 0.86 |
| Example 6 | 102 | 243 | 11.6 | 0 | 0.1 | 0.83 |
| Example 7 | 106 | 254 | 11.0 | 0 | 0.1 | 0.88 |
| Example 8 | 105 | 251 | 10.8 | 0 | 0 | 0.89 |
| Example 9 | 106 | 256 | 10.4 | 0 | 0 | 0.91 |
| Example 10 | 108 | 259 | 10.1 | 0 | 0 | 0.92 |
| Example 11 | 112 | 265 | 9.5 | 0 | 0 | 0.95 |
| Example 12 | 110 | 261 | 9.7 | 0 | 0 | 0.93 |
| Example 13 | 115 | 267 | 9.2 | 0 | 0 | 0.95 |
| Example 14 | 116 | 269 | 8.7 | 0 | 0 | 0.97 |
| Example 15 | 118 | 271 | 8.5 | 0 | 0 | 0.98 |
| Comparative example 1 | 84 | 208 | 17.2 | 1 | 0.5 | 0.64 |
| Comparative example 2 | 89 | 219 | 15.3 | 1 | 0.3 | 0.71 |
| Comparative example 3 | 86 | 220 | 15.9 | 1 | 0.3 | 0.68 |
| Comparative example 4 | 91 | 218 | 14.9 | 1 | 0.3 | 0.72 |
As can be seen from the data in Table 4, the coagulation rate of the shield grouting material prepared by adding the thickening agent and the expanding agent into the shield grouting material and blending the thickening agent, the expanding agent, the cement, the fly ash, the sand, the bentonite and the water reducing agent is improved.
As can be seen by combining the detection data of the embodiment 3 and the embodiments 5-6, the thickener of the preparation example 2 has better proportioning, and the shield grouting material prepared by the thickener of the preparation example 2 has the advantages of shortened setting time, increased consistency and fluidity, 0mm of stratification degree, 0.1 percent of bleeding rate and reduced 28d land-water strength ratio. In combination with the test data of example 7, it can be seen that when the average particle size of hydroxypropyl methylcellulose is 100 mesh, the setting time is shorter, and the consistency and fluidity of the shield grouting material are increased.
As can be seen by combining the test data of example 7 and examples 8-10, the prepared shield grouting material has shorter setting time, gradually increased consistency and fluidity and reduced 28d land-water strength ratio with the increase of the addition amount of the thickening agent. When the addition amount of the thickening agent is 4kg, the setting time is shortened to 10.1h, the consistency of the material is 108mm, the fluidity is 259mm, and the 28d land-water strength ratio is 0.92%.
As can be seen by combining the detection data of the example 10 and the examples 11-12, the shield grouting material prepared by the expanding agent of the preparation example 5 has the advantages of shortened setting time, increased consistency and fluidity, 0 stratification degree and bleeding rate and increased 28d land-water strength ratio.
It can be seen from the combination of the test data of example 11 and examples 13-15 that the setting time of the shield grouting material can be shortened when gypsum is added into the expanding agent, and when the addition amount of gypsum is 4kg, the setting time is shortened to 8.5h, and the material has the consistency of 118mm, the fluidity of 271mm and the 28d land-water strength ratio of 0.98%.
The combination of the test data of example 1 and comparative examples 1-4 shows that the addition of the thickener can increase the coagulation rate of the shield grouting material, and when only two of the silica fume, the hydroxypropyl methyl cellulose and the diallyl phthalate are added, the performance of the prepared shield grouting material is not as good as that when the silica fume, the hydroxypropyl methyl cellulose and the diallyl phthalate are added simultaneously, which indicates that the silica fume, the hydroxypropyl methyl cellulose and the diallyl phthalate have synergistic effect.
The specific embodiments are only for explaining the present application and are not limiting to the present application, and those skilled in the art can make modifications to the embodiments without inventive contribution as required after reading the present specification, but all the embodiments are protected by patent law within the scope of the claims of the present application.
Claims (8)
1. A shield grouting material is characterized in that: the feed comprises the following raw materials in parts by weight: 80-120 parts of cement, 300 parts of fly ash 180-; the thickening agent comprises silica fume, hydroxypropyl methyl cellulose and diallyl phthalate.
2. The shield grouting material according to claim 1, characterized in that: the shield grouting material comprises the following raw materials in parts by weight: 90-110 parts of cement, 220-280 parts of fly ash, 250-300 parts of sand, 60-70 parts of bentonite, 2.5-3.5 parts of thickening agent, 0.8-1.2 parts of expanding agent and 1-2 parts of water reducing agent.
3. The shield grouting material according to claim 1, characterized in that: the thickening agent comprises the following components in parts by weight: 5-15 parts of silica fume, 0.5-1 part of hydroxypropyl methyl cellulose and 2-4 parts of diallyl phthalate.
4. The shield grouting material according to claim 3, characterized in that: the average particle size of the hydroxypropyl methyl cellulose is 80-100 meshes.
5. The shield grouting material according to claim 1, characterized in that: the expanding agent comprises the following components in parts by weight: 5-10 parts of calcium sulphoaluminate, 4-8 parts of calcium oxide and 4-6 parts of magnesium oxide.
6. The shield grouting material according to claim 1, characterized in that: the expanding agent also comprises 2-4 parts by weight of gypsum.
7. The shield grouting material according to claim 1, characterized in that: the water reducing agent is a polycarboxylic acid high-performance water reducing agent.
8. A method for preparing a shield grouting material according to any one of claims 1-7, characterized in that: which comprises the following steps:
1) uniformly mixing the silica fume, the hydroxypropyl methyl cellulose and the diallyl phthalate to obtain a thickening agent;
2) uniformly mixing calcium sulphoaluminate, calcium oxide and magnesium oxide to obtain an expanding agent;
3) and adding the thickening agent and the expanding agent into cement, fly ash, sand, bentonite and a water reducing agent, and uniformly mixing to obtain the shield grouting material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210289711.XA CN114573278B (en) | 2022-03-23 | 2022-03-23 | Shield grouting material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210289711.XA CN114573278B (en) | 2022-03-23 | 2022-03-23 | Shield grouting material and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114573278A true CN114573278A (en) | 2022-06-03 |
| CN114573278B CN114573278B (en) | 2023-01-24 |
Family
ID=81783098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210289711.XA Active CN114573278B (en) | 2022-03-23 | 2022-03-23 | Shield grouting material and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114573278B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115504720A (en) * | 2022-10-20 | 2022-12-23 | 佛山市鲸砼科技有限公司 | Premixed shield synchronous grouting material |
| CN115626789A (en) * | 2022-10-20 | 2023-01-20 | 山东大学 | Low-carbon anti-permeability grouting material for filling back of TBM tunnel lining and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101269938A (en) * | 2008-04-29 | 2008-09-24 | 武汉理工大学 | Tunnel backing cloth slip casting material capable of preventing duct piece float upward and preparation method thereof |
| CN107512862A (en) * | 2017-08-08 | 2017-12-26 | 中交武汉港湾工程设计研究院有限公司 | A kind of special tackifier of shield synchronization slip casting material |
| CN108558330A (en) * | 2018-05-22 | 2018-09-21 | 武汉源锦建材科技有限公司 | A kind of tunnel-liner vault band mould grouting microdilatancy grout material |
| JP2019006645A (en) * | 2017-06-27 | 2019-01-17 | 宇部興産建材株式会社 | Cement composition for PC grout |
| CN114181578A (en) * | 2021-11-18 | 2022-03-15 | 中冶武汉冶金建筑研究院有限公司 | External wall heat-preservation and heat-insulation composite building coating and preparation method thereof |
-
2022
- 2022-03-23 CN CN202210289711.XA patent/CN114573278B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101269938A (en) * | 2008-04-29 | 2008-09-24 | 武汉理工大学 | Tunnel backing cloth slip casting material capable of preventing duct piece float upward and preparation method thereof |
| JP2019006645A (en) * | 2017-06-27 | 2019-01-17 | 宇部興産建材株式会社 | Cement composition for PC grout |
| CN107512862A (en) * | 2017-08-08 | 2017-12-26 | 中交武汉港湾工程设计研究院有限公司 | A kind of special tackifier of shield synchronization slip casting material |
| CN108558330A (en) * | 2018-05-22 | 2018-09-21 | 武汉源锦建材科技有限公司 | A kind of tunnel-liner vault band mould grouting microdilatancy grout material |
| CN114181578A (en) * | 2021-11-18 | 2022-03-15 | 中冶武汉冶金建筑研究院有限公司 | External wall heat-preservation and heat-insulation composite building coating and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115504720A (en) * | 2022-10-20 | 2022-12-23 | 佛山市鲸砼科技有限公司 | Premixed shield synchronous grouting material |
| CN115626789A (en) * | 2022-10-20 | 2023-01-20 | 山东大学 | Low-carbon anti-permeability grouting material for filling back of TBM tunnel lining and preparation method thereof |
| CN115626789B (en) * | 2022-10-20 | 2023-09-05 | 山东大学 | Low-carbon impervious grouting material for back filling of TBM tunnel lining and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114573278B (en) | 2023-01-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| He et al. | A literature review on properties and applications of grouts for shield tunnel | |
| CN107586077B (en) | Super-retarding concrete | |
| CN114573278B (en) | Shield grouting material and preparation method thereof | |
| JP3487133B2 (en) | Ultra-fast hardening non-shrink grout material | |
| CN103449762B (en) | Early-strength micro-expanding synchronous grouting material prepared from shield tailings and preparation method of synchronous grouting material | |
| CN108341640A (en) | A kind of early-strength gypsum base thick-layer leveling mortar | |
| CN110746165A (en) | Ocean engineering repair mortar and preparation method thereof | |
| CN111205058B (en) | Self-leveling mortar and preparation method and application thereof | |
| CN106587711B (en) | Special additive for self-dense concrete is used in a kind of perfusion of enclosure space | |
| CN107324713B (en) | A kind of self-compaction concrete filled steel tube and preparation method thereof | |
| CN105347760A (en) | Slow-setting type waterproof mortar having self-repairing function and secondary permeability resistance as well as preparation method thereof | |
| CN108529994A (en) | A kind of unitary system special cement gravity flow self-leveling floor material | |
| CN113185216B (en) | High-impermeability self-compaction concrete and preparation method thereof | |
| CN108793857A (en) | A kind of shield-tunneling construction synchronous grouting dry-mixed mortar and preparation method thereof | |
| CN111170758A (en) | Foam concrete, preparation method and application thereof | |
| CN107857493A (en) | A kind of method that sulphate aluminium cement is modified | |
| CN115385633B (en) | Special grouting material for anti-crack composite grouting pavement based on polymer modification and preparation method thereof | |
| CN106186932A (en) | A kind of strength cement-based grouting material and preparation method thereof | |
| CN110510946A (en) | A kind of β ardealite based self-leveling mortar and preparation method thereof | |
| CN108585698A (en) | A kind of special joint filling mortar of light cellular partition board | |
| CN108191345A (en) | A kind of mortar of self-compaction and preparation method thereof | |
| CN105347767A (en) | Quick-setting type waterproof mortar having self-repairing function and secondary permeability resistance as well as preparation method thereof | |
| CN110317034A (en) | Half water ardealite base filler of one kind and its preparation method and application | |
| CN113998939A (en) | Phosphogypsum-based super-retarding concrete and preparation method thereof | |
| CN111689747B (en) | 3D printed color decoration mortar |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |