CN115304300A - Activation method of shield muck graded fine mud and preparation method of grouting material - Google Patents
Activation method of shield muck graded fine mud and preparation method of grouting material Download PDFInfo
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- CN115304300A CN115304300A CN202210848097.6A CN202210848097A CN115304300A CN 115304300 A CN115304300 A CN 115304300A CN 202210848097 A CN202210848097 A CN 202210848097A CN 115304300 A CN115304300 A CN 115304300A
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- 239000000463 material Substances 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000004913 activation Effects 0.000 title claims abstract description 21
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 49
- 238000002156 mixing Methods 0.000 claims abstract description 41
- 239000002893 slag Substances 0.000 claims abstract description 28
- 239000000203 mixture Substances 0.000 claims abstract description 22
- 239000003513 alkali Substances 0.000 claims abstract description 20
- 238000001354 calcination Methods 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000012190 activator Substances 0.000 claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 8
- 230000003213 activating effect Effects 0.000 claims abstract description 8
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 8
- 239000010881 fly ash Substances 0.000 claims abstract description 8
- 239000010959 steel Substances 0.000 claims abstract description 8
- 238000000498 ball milling Methods 0.000 claims abstract description 6
- 238000001035 drying Methods 0.000 claims abstract description 6
- 239000002245 particle Substances 0.000 claims description 17
- 238000004137 mechanical activation Methods 0.000 claims description 9
- 239000008247 solid mixture Substances 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 6
- 238000007873 sieving Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- 239000011148 porous material Substances 0.000 claims description 2
- 238000004064 recycling Methods 0.000 abstract description 8
- 239000002910 solid waste Substances 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 238000011161 development Methods 0.000 abstract description 2
- 230000002195 synergetic effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 8
- 238000010276 construction Methods 0.000 description 6
- 238000006703 hydration reaction Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 239000000378 calcium silicate Substances 0.000 description 2
- 229910052918 calcium silicate Inorganic materials 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910004283 SiO 4 Inorganic materials 0.000 description 1
- 229910002808 Si–O–Si Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- KCZFLPPCFOHPNI-UHFFFAOYSA-N alumane;iron Chemical compound [AlH3].[Fe] KCZFLPPCFOHPNI-UHFFFAOYSA-N 0.000 description 1
- INJRKJPEYSAMPD-UHFFFAOYSA-N aluminum;silicic acid;hydrate Chemical compound O.[Al].[Al].O[Si](O)(O)O INJRKJPEYSAMPD-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 159000000007 calcium salts Chemical class 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000002223 garnet Substances 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910052850 kyanite Inorganic materials 0.000 description 1
- 239000010443 kyanite Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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
- 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
- C04B40/0046—Premixtures of ingredients characterised by their processing, e.g. sequence of mixing the ingredients when preparing the premixtures
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/0418—Wet materials, e.g. slurries
-
- 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
- C04B7/00—Hydraulic cements
- C04B7/14—Cements containing slag
- C04B7/147—Metallurgical slag
- C04B7/153—Mixtures thereof with other inorganic cementitious materials or other activators
- C04B7/1535—Mixtures thereof with other inorganic cementitious materials or other activators with alkali metal containing activators, e.g. sodium hydroxide or waterglass
-
- 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
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/243—Mixtures thereof with activators or composition-correcting additives, e.g. mixtures of fly ash and alkali activators
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention provides an activation method of shield muck graded fine mud and a preparation method of a grouting material, which comprise the following steps: drying the classified fine mud and then carrying out ball milling to obtain the mechanically activated classified fine mud; taking the mechanically activated graded fine mud, adding alkali residue and carbide slag into the mechanically activated graded fine mud, mixing the alkali residue and the carbide slag, mixing NaOH with the mixture, and then putting the mixture into a muffle furnace for calcination to obtain a graded fine mud activated product; mixing NaOH with the mechanically activated graded fine mud, and then placing the mixture in a muffle furnace for roasting to prepare an alkali activator; mixing an alkali activating agent with slag, steel slag and fly ash to obtain a cementing material; and mixing the graded fine mud activated product with a cementing material, and adding water for mixing to obtain the graded fine mud grouting material. The grouting material prepared by the invention has high mechanical strength, and in the process of preparing the grouting material, the synergistic effect of the physicochemical properties of various solid wastes is utilized, so that various solid wastes are consumed, and the sustainable development concept of waste recycling is embodied.
Description
Technical Field
The invention relates to the field of recycling of shield muck, in particular to an activation method of shield muck graded fine mud and a preparation method of grouting materials.
Background
The shield construction method has the advantages of high construction speed, small influence on the environment, high construction efficiency and the like, and is widely applied to subway construction. With the acceleration of the urbanization process, the urban rail transit construction is also bound to be accelerated, the problem of a large amount of waste muck generated by the construction of subway tunnels is severe, and how to effectively and properly dispose and recycle the shield muck is a problem in the whole society.
Although the recycling of the shield muck in China has made great progress, the defects of single recycling mode, high energy consumption and poor effect are not solved. At present, the shield muck recycling application is mainly to separate sand and fine mud by classification, the sand and the fine mud can be used as concrete raw materials to generate economic benefit, but the classification fine mud is still mainly treated by a landfill method. The size of the graded fine mud particles of the shield muck is smaller, and when the universal cement is used as a cementing material to prepare a grouting material, the using amount of the cementing material is large and the mechanical strength of the prepared test block is not high.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide an activation method of shield muck graded fine mud and a preparation method of a grouting material, so as to solve the problems of single recycling mode, high energy consumption and poor recycling effect of shield muck graded fine mud in the prior art and the problem of low mechanical strength of the grouting material prepared from the shield muck graded fine mud.
In order to achieve the purpose, the invention provides an activation method of shield muck graded fine mud, which comprises the following steps:
s1, mechanical activation: drying the classified fine mud, then carrying out ball milling, and then sieving through a standard sieve with sieve pores of 0.115-0.135 mm to obtain the mechanically activated classified fine mud;
s2, thermochemical activation: taking the mechanically activated graded fine mud, fully mixing the graded fine mud, the alkaline residue and the carbide slag according to a mass ratio of 2-3: and after fully mixing 90 to 92 percent of the mixture, placing the mixture in a muffle furnace for calcining for 50 to 70min, and preserving the heat for 1.5 to 2 hours to obtain a graded fine mud activated product.
In the scheme, the method comprises the following steps: the standard sieve has a mesh size of 0.125mm.
In the scheme, the method comprises the following steps: and mixing the mechanically activated graded fine mud, the alkaline residue and the carbide slag according to a mass ratio of 2.
In the scheme, the method comprises the following steps: naOH particles and solid mixture according to the mass ratio of 10%: mixing 90 percent of the mixture, then placing the mixture in a muffle furnace to calcine for 60min, and preserving the temperature for 2h.
The invention also provides a preparation method of the shield muck graded fine mud grouting material, which comprises the mechanically activated graded fine mud and a graded fine mud activation product prepared by the method, and the preparation method comprises the following steps:
s1, fully mixing NaOH particles and the mechanically activated graded fine mud according to the mass ratio of 1-2:5-7, then placing the mixture in a muffle furnace at 1100-1300 ℃ for roasting for 2-2.5 h to prepare an alkali activator, and cooling the alkali activator to room temperature for later use;
s2, mixing an alkali activating agent with the slag, the steel slag and the fly ash according to a mass ratio of 20-24;
and S3, mixing the graded fine mud activated product with a cementing material, uniformly stirring, adding water, and mixing to obtain the shield muck graded fine mud grouting material.
In the scheme, the method comprises the following steps: naOH particles and the classified fine mud after mechanical activation are mixed according to the mass ratio of 1:5.
In the scheme, the method comprises the following steps: the alkali activating agent is mixed with the slag, the steel slag and the fly ash according to the mass ratio of 24.
In the scheme, the method comprises the following steps: the amount of water is 40-50% of the mixture of the activation product of the graded fine mud and the cementing material.
In the scheme, the method comprises the following steps: and fully mixing NaOH particles with the mechanically activated graded fine mud, and then placing the mixture in a muffle furnace at 1200 ℃ for roasting for 2 hours.
The invention has the beneficial effects that: mechanical activation can reduce the fineness of the graded fine mud,the specific surface area is increased, the particle size distribution is improved, the filling effect is better exerted, a self-compacting system is perfected, and the hydration reaction is promoted, so that the mechanical property of the cementing material is improved; in the thermochemical activation, the main components of the alkaline residue are calcium salts such as calcium carbonate, calcium sulfate and calcium chloride, the main component of the carbide slag is calcium hydroxide, the activity of the alkaline residue and the carbide slag can be excited by doping NaOH, when a subsequent graded fine mud activated product is mixed with a cementing material, the graded fine mud activated product can excite the hydration reaction activity of the shield muck cementing material to a certain extent, and the early compressive strength of a grouting material is improved to a certain extent; in the process of preparing the grouting material, naOH particles are mixed with the graded fine mud after mechanical activation, naOH is added to react with the graded fine mud of the shield muck to prepare the alkali activator, and the graded fine mud of the shield muck is mainly quartz (SiO) 2 ) Additionally, a small amount of iron aluminum garnet (Fe) 3 Al 2 (SiO 4 ) 3 ) And kyanite (Al) 2 SiO 5 ) And after the shield muck is classified and fine mud is dehydrated, the fine mud is quickly decomposed to generate amorphous Al 2 O 3 、SiO 2 Ca (OH) generated by hydration reaction stimulated by NaOH 2 The reaction generates hydrated calcium silicate with hydraulicity, si-O bond is broken and recombined in the hydration reaction process and gradually polymerized into Si-O-Si bond, which is the main cause for improving the activity of the hydrated calcium silicate;
because the activity of the graded fine mud is improved, and the activity of the graded fine mud cementing material is improved, the prepared grouting material is high in mechanical strength and stable in performance, has good adsorption force and strong fluidity in the grouting process, can effectively improve the early strength of the slurry, has excellent popularization value, consumes various solid wastes in the preparation process, and embodies the green sustainable development concept of waste recycling.
Detailed Description
A shield muck graded fine mud activation method mainly comprises the following steps:
mechanical activation: and drying the classified fine mud, performing ball milling, and then sieving through a standard sieve with sieve holes of 0.115-0.135 mm to obtain the mechanically activated classified fine mud.
Thermochemical activation: taking the mechanically activated graded fine mud, fully mixing the graded fine mud, the alkaline residue and the carbide slag according to a mass ratio of 2-3: and after fully mixing 90-92%, placing the mixture in a muffle furnace for calcining for 50-70 min, and preserving the heat for 1.5-2 h to obtain a graded fine mud activated product.
Preferably, the standard sieve has a mesh size of 0.125mm.
Preferably, the mechanically activated graded fine mud, the alkaline residue and the carbide slag are mixed according to the mass ratio of 2.
Preferably, the mass ratio of NaOH particles to solid mixture is 10%: mixing 90%, calcining in a muffle furnace for 60min, and keeping the temperature for 2h.
The invention also provides a preparation method of the shield muck graded fine mud grouting material, which comprises the mechanically activated graded fine mud and a graded fine mud activation product prepared by the method, and the preparation method comprises the following steps:
fully mixing NaOH particles with the mechanically activated graded fine mud according to the mass ratio of 1-2:5-7, then placing the mixture in a muffle furnace at 1100-1300 ℃ for roasting for 2-2.5 h to prepare an alkali activator, and cooling the alkali activator to room temperature for later use.
Mixing an alkali activating agent with the slag, the steel slag and the fly ash according to a mass ratio of 20-24.
And mixing the graded fine mud activated product with a cementing material, uniformly stirring, and adding water for mixing to obtain the shield muck graded fine mud grouting material.
Preferably, the NaOH pellets are mixed with the mechanically activated graded fine mud in a mass ratio of 1:5.
Preferably, the alkali activating agent is mixed with the slag, the steel slag and the fly ash according to the mass ratio of 24.
Preferably, the amount of water is 40% to 50% of the mixture of the graded fine mud activation product and the cementitious material.
Preferably, naOH particles and the classified fine mud after mechanical activation are fully mixed and then are placed in a muffle furnace at 1200 ℃ for roasting, wherein the roasting time is 2 hours.
Example 1
And drying the classified fine mud, performing ball milling, and then sieving by using a standard sieve with 0.125mm of sieve holes to obtain 1000g of mechanically activated classified fine mud.
And taking 500g of mechanically activated graded fine mud, adding 250g of alkaline residue and 250g of carbide slag into the mechanically activated graded fine mud, fully mixing to obtain a solid mixture, fully mixing 100g of NaOH particles with the solid mixture, then putting the mixture into a 600 ℃ muffle furnace for calcination, wherein the calcination time is 1h, and preserving heat for 2h after calcination to obtain a graded fine mud activated product.
And fully mixing 100g of NaOH particles with 500g of mechanically activated graded fine mud, then placing the mixture in a muffle furnace at 1200 ℃ for roasting for 2h to prepare an alkali activator, and cooling the alkali activator to room temperature for later use.
Mixing an alkali activating agent with 75g of slag, 50g of steel slag and 50g of fly ash, and uniformly stirring to obtain the cementing material for later use.
Mixing the graded fine mud activated product with a cementing material, uniformly stirring, adding water for mixing, wherein the using amount of the water is 40-50% of the mixture of the graded fine mud activated product and the cementing material, obtaining the shield muck graded fine mud grouting material, pouring the grouting material into a mold, and putting the mold into a constant-temperature constant-humidity curing box for curing.
Comparative example 1
And drying the classified fine mud, performing ball milling, and then sieving by using a standard sieve with 0.125mm of sieve holes to obtain 500g of mechanically activated classified fine mud.
And taking 500g of mechanically activated graded fine mud, adding 250g of alkaline residue and 250g of carbide slag into the mechanically activated graded fine mud, fully mixing to obtain a solid mixture, fully mixing 100g of NaOH particles with the solid mixture, then putting the mixture into a 600 ℃ muffle furnace for calcination, wherein the calcination time is 1h, and preserving heat for 2h after calcination to obtain a graded fine mud activated product.
Mixing the graded fine mud activated product with a traditional cementing material (universal cement), uniformly stirring, adding water for mixing, wherein the using amount of the water is 40% -50% of the mixture of the graded fine mud activated product and the cementing material to obtain the shield muck graded fine mud grouting material, and pouring the grouting material into a mold and putting the mold into a constant-temperature constant-humidity curing box for curing.
The performance test of the graded fine mud grouting material prepared in example 1 shows that the compressive strength of the grouting material after 3 days, 7 days and 28 days is 1.52MPa, 2.23MPa and 4.71MPa respectively. The performance test of the graded fine mud grouting material prepared in the comparative example 1 shows that the compressive strength of the grouting material after 3 days, 7 days and 28 days is 0.59MPa, 1.48MPa and 2.96MPa respectively. Therefore, in a certain period of time, the longer the curing time is, the stronger the compressive strength of the grouting material is; in the same maintenance time, the compressive strength of the shield muck graded fine mud grouting material prepared in the embodiment 1 is higher than that of the shield muck graded fine mud grouting material prepared in the comparative example 1, namely the shield muck graded fine mud grouting material prepared by the invention has the advantages of high mechanical strength and stable performance.
Claims (9)
1. The activation method of shield muck graded fine mud is characterized by comprising the following steps:
s1, mechanical activation: drying the classified fine mud, then carrying out ball milling, and then sieving through a standard sieve with sieve pores of 0.115-0.135 mm to obtain the mechanically activated classified fine mud;
s2, thermochemical activation: taking the mechanically activated graded fine mud, fully mixing the graded fine mud, the alkaline residue and the carbide slag according to a mass ratio of 2-3: and after fully mixing 90-92%, placing the mixture in a muffle furnace for calcining for 50-70 min, and preserving the heat for 1.5-2 h to obtain a graded fine mud activated product.
2. The shield muck graded fine mud activation method according to claim 1, characterized in that: the standard sieve has a mesh size of 0.125mm.
3. The shield muck graded fine mud activation method according to claim 1, characterized in that: and mixing the mechanically activated graded fine mud, the alkaline residue and the carbide slag according to a mass ratio of 2.
4. The shield muck graded fine mud activation method according to claim 1, characterized in that: naOH particles and solid mixture according to the mass ratio of 10%: mixing 90%, calcining in a muffle furnace for 60min, and keeping the temperature for 2h.
5. A method for preparing shield muck graded fine mud grouting material, which is characterized by comprising the graded fine mud after mechanical activation and the graded fine mud activation product prepared by any one of claims 1 to 4, and comprises the following steps:
s1, fully mixing NaOH particles with mechanically activated graded fine mud according to a mass ratio of 1-2:5-7, then placing the mixture in a muffle furnace at 1100-1300 ℃ for roasting for 2-2.5 hours to prepare an alkali activator, and cooling the alkali activator to room temperature for later use;
s2, mixing an alkali activating agent with the slag, the steel slag and the fly ash according to a mass ratio of 20-24;
and S3, mixing the graded fine mud activated product with a cementing material, uniformly stirring, adding water, and mixing to obtain the shield muck graded fine mud grouting material.
6. The preparation method of the shield muck graded fine mud grouting material according to claim 5, characterized by comprising the following steps: naOH particles and the classified fine mud after mechanical activation are mixed according to the mass ratio of 1:5.
7. The preparation method of the shield muck graded fine mud grouting material according to claim 5, characterized by comprising the following steps: the alkali activating agent is mixed with the slag, the steel slag and the fly ash according to the mass ratio of 24.
8. The preparation method of the shield muck graded fine mud grouting material according to claim 5, characterized by comprising the following steps: the amount of water is 40-50% of the mixture of the activation product of the graded fine mud and the cementing material.
9. The preparation method of the shield muck graded fine mud grouting material according to claim 5, characterized by comprising the following steps: and fully mixing NaOH particles with the mechanically activated graded fine mud, and then placing the mixture in a muffle furnace at 1200 ℃ for roasting for 2 hours.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210848097.6A CN115304300A (en) | 2022-07-19 | 2022-07-19 | Activation method of shield muck graded fine mud and preparation method of grouting material |
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| CN202210848097.6A CN115304300A (en) | 2022-07-19 | 2022-07-19 | Activation method of shield muck graded fine mud and preparation method of grouting material |
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| CN202210848097.6A Pending CN115304300A (en) | 2022-07-19 | 2022-07-19 | Activation method of shield muck graded fine mud and preparation method of grouting material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116102281A (en) * | 2022-11-18 | 2023-05-12 | 湖南科技大学 | Method for quickly preparing high-activity mixed material at low temperature by utilizing shield drying soil and high-activity mixed material prepared by method and application of high-activity mixed material |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108117285A (en) * | 2017-12-01 | 2018-06-05 | 深圳市华威环保建材有限公司 | A kind of activation method of architecture sediment |
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| CN113354314A (en) * | 2021-07-20 | 2021-09-07 | 深圳市和盛环保科技有限公司 | High-activity cementing material based on engineering muck |
| CN113979682A (en) * | 2021-11-30 | 2022-01-28 | 同济大学 | Regenerated powder solidified shield muck mixed material and preparation method and application thereof |
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| CN108117285A (en) * | 2017-12-01 | 2018-06-05 | 深圳市华威环保建材有限公司 | A kind of activation method of architecture sediment |
| CN108192633A (en) * | 2017-12-28 | 2018-06-22 | 武汉都市环保工程技术股份有限公司 | Heavy metal combined pollution soil remediation material based on alkaline residue and remediation method |
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| CN111454011A (en) * | 2020-03-25 | 2020-07-28 | 哈尔滨工业大学(深圳)(哈尔滨工业大学深圳科技创新研究院) | Method for preparing alkali-activated cementing material by utilizing engineering muck and alkali-activated cementing material |
| CN112125633A (en) * | 2020-10-26 | 2020-12-25 | 燕山大学 | C30 grade full-solid waste concrete and preparation method thereof |
| CN112429982A (en) * | 2020-12-10 | 2021-03-02 | 唐山三友氯碱有限责任公司 | Cementing material and mortar material based on wet-based alkaline residue-wet-based carbide slag and preparation method thereof |
| CN113354314A (en) * | 2021-07-20 | 2021-09-07 | 深圳市和盛环保科技有限公司 | High-activity cementing material based on engineering muck |
| CN113979682A (en) * | 2021-11-30 | 2022-01-28 | 同济大学 | Regenerated powder solidified shield muck mixed material and preparation method and application thereof |
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| CN116102281A (en) * | 2022-11-18 | 2023-05-12 | 湖南科技大学 | Method for quickly preparing high-activity mixed material at low temperature by utilizing shield drying soil and high-activity mixed material prepared by method and application of high-activity mixed material |
| CN116102281B (en) * | 2022-11-18 | 2023-07-25 | 湖南科技大学 | Method for quickly preparing high-activity mixed material at low temperature by utilizing shield drying soil and high-activity mixed material prepared by method and application of high-activity mixed material |
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