CN116041031A - In-situ treatment technology of engineering slag soil with high water content - Google Patents
In-situ treatment technology of engineering slag soil with high water content Download PDFInfo
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- CN116041031A CN116041031A CN202211719101.5A CN202211719101A CN116041031A CN 116041031 A CN116041031 A CN 116041031A CN 202211719101 A CN202211719101 A CN 202211719101A CN 116041031 A CN116041031 A CN 116041031A
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- 239000002689 soil Substances 0.000 title claims abstract description 72
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 62
- 239000002893 slag Substances 0.000 title claims abstract description 52
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 30
- 238000005516 engineering process Methods 0.000 title abstract description 9
- 239000010440 gypsum Substances 0.000 claims abstract description 72
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 72
- 239000000463 material Substances 0.000 claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 20
- 239000010882 bottom ash Substances 0.000 claims abstract description 17
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000010936 titanium Substances 0.000 claims abstract description 13
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 13
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 claims abstract description 11
- 235000019353 potassium silicate Nutrition 0.000 claims description 13
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 13
- 150000004683 dihydrates Chemical class 0.000 claims description 11
- 238000003756 stirring Methods 0.000 claims description 10
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 7
- -1 phosphogypsum dihydrate Chemical class 0.000 claims description 7
- 238000006477 desulfuration reaction Methods 0.000 claims description 5
- 230000023556 desulfurization Effects 0.000 claims description 5
- 238000001354 calcination Methods 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 2
- QWWIMOOFEDJKFN-UHFFFAOYSA-N titanium;dihydrate Chemical compound O.O.[Ti] QWWIMOOFEDJKFN-UHFFFAOYSA-N 0.000 claims 2
- 230000008901 benefit Effects 0.000 abstract description 8
- 239000002910 solid waste Substances 0.000 abstract description 5
- 239000002994 raw material Substances 0.000 abstract description 3
- 239000004566 building material Substances 0.000 abstract description 2
- 239000002131 composite material Substances 0.000 abstract description 2
- 238000009776 industrial production Methods 0.000 abstract description 2
- 239000003795 chemical substances by application Substances 0.000 description 18
- 238000010521 absorption reaction Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 4
- 238000005303 weighing Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000003755 preservative agent Substances 0.000 description 2
- 230000002335 preservative effect Effects 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- JAWMENYCRQKKJY-UHFFFAOYSA-N [3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-ylmethyl)-1-oxa-2,8-diazaspiro[4.5]dec-2-en-8-yl]-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidin-5-yl]methanone Chemical compound N1N=NC=2CN(CCC=21)CC1=NOC2(C1)CCN(CC2)C(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F JAWMENYCRQKKJY-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000007712 rapid solidification Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Classifications
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- 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
- C04B2111/00767—Uses not provided for elsewhere in C04B2111/00 for waste stabilisation purposes
- C04B2111/00784—Uses not provided for elsewhere in C04B2111/00 for waste stabilisation purposes for disposal only
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention provides an in-situ treatment method of high-water-content muck, which can be used for treating engineering muck with water content higher than 60%, and specifically comprises the following steps: by the composite use of the uncalcined gypsum and the calcined gypsum, a large amount of water in the engineering slag soil is absorbed, and the influence of water in the slag soil with high water content on the curing material is reduced by using the bottom ash. The gypsum type used in the invention relates to titanium gypsum, phosphogypsum and desulfurized gypsum, the gypsum type is wide, the raw materials are all industrial products, the utilization rate of solid waste materials in the curing materials reaches 65% -100%, the emission of solid waste in industrial production is reduced, and the environment-friendly gypsum type modified gypsum has the advantage of being an environment-friendly building material; meanwhile, the slag soil treated by the engineering slag soil in-situ treatment technology provided by the invention has the advantages of quick setting time and higher strength after setting, and can effectively reduce engineering cost.
Description
Technical Field
The invention relates to the field of engineering slag soil treatment, in particular to an in-situ treatment technology of engineering slag soil with high water content and application thereof.
Background
Along with the continuous development of economic construction land and the continuous acceleration of urban construction land in China, the discharge amount of engineering dregs is increased year by year, which becomes a great burden for the economic and social development in China. In the engineering of foundation treatment, rush repair and rush construction and the like, the quick solidification of the soil has important significance. Aiming at the soil with low water content, the types of soil curing agents in the current building market are quite various, the curing time is generally 16-24 hours, and the soil curing agents are mainly divided into the following types:
(1) Conventional inorganic curing agents represented by lime and cement;
(2) An ionic soil curing agent mainly aiming at cohesive soil;
(3) Organic soil curing agent prepared from polymers, resins, high molecular materials and the like;
(4) Biological enzyme soil solidifying agent is prepared by fermenting organic matters.
The application effects of the soil curing agents with different action mechanisms on the mechanical property, the water stability, the durability and the dynamic property of the soil are different, and the existing soil curing agents have the problems of long construction period, potential environmental hazard risk and the like. And for the high water content slag soil (the water content is more than 60 percent), no clear standard and unified material is used for disposing the slag soil. Therefore, how to carry out in-situ rapid solidification transfer on the high-water-content slag soil is a key link of implementation of in-situ treatment technology.
In recent years, due to exhaustion of natural high-quality gypsum resources, titanium gypsum, phosphogypsum and desulfurized gypsum are important components of industrial byproduct gypsum, and resource reuse thereof has become an important point of attention in the gypsum industry.
The Chinese patent publication No. CN102899048A discloses a desulfurized gypsum alkaline residue soil curing agent which is prepared from the following components in percentage by weight: 12-30% of desulfurized gypsum, 20-50% of alkaline residue, 0-30% of slag, 0-5% of additive and 0-20% of fly ash. The invention takes alkaline residue and slag as raw materials, and the prepared curing agent has the advantages of short initial setting time and high compressive strength. However, the curing agent strictly limits the dosage of the desulfurized gypsum and the granularity of the alkaline residue, and meanwhile, the curing agent can only be applied to soil with lower water content, but cannot be applied to engineering residue soil with higher water content, and has certain limitation.
The Chinese patent of the invention with publication number of CN113716927A discloses an phosphogypsum-based soil curing agent, a preparation method, a cured sample and a preparation method thereof, wherein the phosphogypsum-based soil curing agent comprises modified phosphogypsum and active components, and the mass ratio of the modified phosphogypsum to the active components is 1: (0.5-1.5), wherein the modified phosphogypsum is prepared by calcining the undisturbed phosphogypsum and the modifier A at the temperature of 800-900 ℃. The soil curing agent provided by the invention takes PO 42.5 cement as a soil curing material, and has higher strength, but the soil curing agent needs to be calcined at 800-900 ℃ in the preparation process, the preparation process is more complex, the water content of the soil needs to be maintained at a lower level (15-20 wt%) when the soil is cured by the curing agent, and the water content of engineering slag soil tends to be higher than the level of the invention in the actual construction production process, so that the curing agent has larger limitation in use.
In summary, the existing invention for curing soil by using a single gypsum type usually depends on the granularity, the water content and the organic matter content of the soil, and has poor effect on the soil with high water content, a large number of pores still exist in the structure after curing, the water stability and the durability are poor, and shrinkage cracking phenomenon is easy to occur. Therefore, the development of the in-situ treatment method for the soil with high water content has higher social benefit and economic benefit.
Disclosure of Invention
The invention aims to solve the problem of how to quickly solidify engineering dregs with high water content.
In order to solve the problems, the invention provides an in-situ treatment method of high-water-content engineering slag, which can be used for treating engineering slag with water content of more than 60%.
Further, the in-situ treatment method of the high-water-content engineering slag soil comprises the following steps of:
s1, preparing a curing material: mixing 5-30 parts of uncalcined gypsum, 0-20 parts of calcined gypsum, 30-70 parts of bottom ash and 0-10 parts of water glass according to parts by mass to prepare a curing material;
s2, curing dregs: and (3) doping the solidified material prepared in the step (S1) into engineering slag soil with the water content of more than 60%, uniformly mixing, standing, and finishing in-situ treatment after the engineering slag soil reaches a soft plastic state.
Preferably, in the step S1, the ratio of the sum of the mass of the calcined gypsum and the uncalcined gypsum to the mass of the bottom ash is preferably (2 to 3): (6-7).
Further, the step S1 specifically includes: mixing the uncalcined gypsum and the calcined gypsum, stirring uniformly, adding the bottom ash, stirring uniformly, adding the water glass, and stirring uniformly to obtain the cured material.
According to the method for in-situ disposal of the high-moisture-content engineering slag soil, when the engineering slag soil with high moisture content is disposed, operations such as airing and dehydration are not needed, and uncalcined gypsum, calcined gypsum, bottom ash and water glass are directly added into the engineering slag soil with high moisture content to be mixed to prepare a curing material, so that the curing of the high-moisture-content slag soil can be completed.
Preferably, the calcined gypsum is selected from one or more of titanium hemihydrate gypsum, phosphogypsum hemihydrate and desulphurized hemihydrate gypsum.
Further, the calcined gypsum is prepared by calcining one or more of titanium gypsum dihydrate, phosphogypsum dihydrate and desulfurization gypsum dihydrate for 2-5 hours at 180-250 ℃.
Preferably, the uncalcined gypsum is selected from one or more of titanium gypsum dihydrate, phosphogypsum dihydrate and desulfurization gypsum dihydrate.
Although gypsum has water absorption, the water resistance of gypsum is poor, and the addition of bottom ash to gypsum can improve the water resistance of gypsum and solve the problem of poor water resistance of gypsum, and at the same time, the bottom ash also has certain water absorption capacity and can improve the water absorption of the cured material.
Preferably, the water glass has a modulus of 1.0 to 1.5..
Water glass is a common binder, and in the invention, the water glass is mainly used for binding engineering slag.
Further, the mass of the solidified material is 10% -30% of the mass of the engineering slag soil.
Preferably, in the step S2, the standing time is 2 to 12 hours.
The principle of the invention is as follows: the calcined gypsum has extremely strong water absorption capacity after calcination, water in the engineering dregs with high water content is used as reaction water, and the water is absorbed by the combination of the calcined gypsum and the non-calcined gypsum, so that the hardness of the gypsum can be improved after water absorption, and the engineering dregs are solidified and the hardness is improved. The bottom ash can assist the gypsum to absorb water in the engineering slag soil, so that the problem of poor water resistance of the gypsum is solved.
The invention has the beneficial effects that: the invention provides an in-situ treatment method of high-water-content muck, which can be used for treating engineering muck with water content higher than 60%, and specifically comprises the following steps: by the composite use of the uncalcined gypsum and the calcined gypsum, a large amount of water in the engineering slag soil is absorbed, and the influence of water in the slag soil with high water content on the curing material is reduced by using the bottom ash. The gypsum types used in the invention relate to titanium gypsum, phosphogypsum and desulfurized gypsum, and the gypsum types are wide; the raw materials used in the invention are industrial products, the utilization rate of solid waste materials in the solidified materials reaches more than 90%, the emission of solid waste in industrial production is reduced, and the environment-friendly building material has the advantage of being environment-friendly; meanwhile, the slag soil treated by the engineering slag soil in-situ treatment technology provided by the invention has the advantages of quick setting time and higher strength after setting, and can effectively reduce engineering cost.
Drawings
Fig. 1 is a flow chart of the in-situ treatment method of high-water-content muck.
Detailed Description
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of embodiments of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. It should be noted that the following examples are only for illustrating the implementation method and typical parameters of the present invention, and are not intended to limit the scope of the parameters described in the present invention, so that reasonable variations are introduced and still fall within the scope of the claims of the present invention.
It should be noted that endpoints and any values of the ranges disclosed herein are not limited to the precise range or value, and that such range or value should be understood to include values approaching such range or value. For numerical ranges, one or more new numerical ranges may be found between the endpoints of each range, between the endpoint of each range and the individual point value, and between the individual point value, in combination with each other, and are to be considered as specifically disclosed herein.
In order to solve the problem that engineering slag soil with higher water content cannot be effectively solidified in the prior art, the specific embodiment of the invention provides an in-situ treatment technology for engineering slag soil with high water content and application thereof, and the in-situ treatment technology for the engineering slag soil with high water content provided by the invention comprises the following steps: the calcined gypsum and the uncalcined gypsum are compounded, so that the water in the engineering dregs can be absorbed in a large amount, the solidification strength is improved by hardening, the water resistance problem of the gypsum is solved by applying the bottom ash, and the engineering dregs can be bonded by using the water glass as a binder. Using the method
Example 1
Wherein 30 parts of titanium gypsum hemihydrate, 10 parts of phosphogypsum dihydrate, 10 parts of desulfurized gypsum dihydrate, 45 parts of bottom ash and 5 parts of water glass (modulus 1.0) are weighed and uniformly mixed to form a solidified material. Weighing 10 parts of solidified material and 90 parts of engineering slag soil with water content of 70% for mixing.
Example 2
40 parts of titanium gypsum hemihydrate, 5 parts of phosphogypsum dihydrate, 5 parts of desulfurized gypsum dihydrate, 40 parts of bottom ash and 10 parts of water glass (modulus 1.0) are weighed and uniformly mixed to form a solidified material. 30 parts of a curing material and 70 parts of 90% water content engineering slag are weighed and mixed.
Example 3
30 parts of titanium gypsum hemihydrate, 10 parts of titanium gypsum dihydrate, 5 parts of phosphogypsum dihydrate, 5 parts of desulphurized gypsum dihydrate, 40 parts of bottom ash and 10 parts of water glass (modulus 1.0) are weighed and uniformly mixed to form a solidified material. Weighing 10 parts of a solidified material and 90 parts of engineering slag soil with 70% of water content.
The time required for the engineering dregs of examples 1 to 3 to reach the operational state was measured.
The results are shown in Table 1.
TABLE 1 time required for embodiments to reach operational status
| Group of | Time/h required to reach operational status |
| Example 1 | 8 |
| Example 2 | 10 |
| Example 3 | 8 |
The observation, measurement and comparison of the three groups of the solidified soil samples can be carried out to preliminarily obtain that the primary and secondary relations of the solid waste materials affecting the state of the solidified consistency are as follows: bottom ash > uncalcined titanium gypsum > calcined titanium gypsum > dihydrate gypsum > hemihydrate gypsum.
Example 4
The strength of the engineered residue after the in situ treatment by the process Cheng Zhatu of example 1-example 3 was measured as follows:
step 1: weighing 1000g of dry residue soil, adding water to make the water content of the soil reach 80%, and stirring for later use;
step 2: adding the curing materials prepared in the examples 1-3 into the soil with high water content according to the mass fraction of 10%, and uniformly stirring;
step 3: after the above operation was completed, soil was placed in a 40mm cube test block mold, covered with a preservative film, placed in a cool place, covered with a wet towel on the surface layer, cured for 3d and 7d, and tested for unconfined compressive strength, and the results are shown in table 2.
| Group of | 3d compressive Strength/MPa | 7d compressive Strength/MPa |
| Example 1 | 0.6 | 0.83 |
| Example 2 | 0.59 | 1.05 |
| Example 3 | 0.49 | 1.03 |
Example 5
The strength of the engineering slag after treatment by the typical set of engineering slag in situ treatment technique in examples 1-3 was measured as follows:
step 1: weighing 1000g of dry residue soil, adding water to enable the water content of the soil to reach 60%, and stirring for later use;
step 2: adding the prepared curing material into the soil with high water content according to the mass fraction of 10%, and uniformly stirring;
step 3: after the above operation was completed, soil was placed in a 40mm cube test block mold, covered with a preservative film, placed in a cool place, covered with a wet towel on the surface layer, cured for 3d and 7d, and tested for unconfined compressive strength, and the results are shown in table 3.
| Group of | 3d compressive Strength/MPa | 7d compressive Strength/MPa |
| Example 1 | 0.6 | 0.83 |
| Example 2 | 0.59 | 1.05 |
| Example 3 | 0.49 | 1.03 |
The result shows that the engineering slag soil treated by the engineering slag soil in-situ treatment technology provided by the invention has the 7d compressive strength of about 1MPa and higher strength.
Although the present disclosure is described above, the scope of protection of the present disclosure is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the scope of the invention.
Claims (9)
1. The in-situ treatment method of the engineering slag soil with high water content is characterized by comprising the following steps of:
s1, preparing a curing material: mixing 5-30 parts of uncalcined gypsum, 0-20 parts of calcined gypsum, 30-70 parts of bottom ash and 0-10 parts of water glass according to parts by mass to prepare a curing material;
s2, curing dregs: and (3) doping the solidified material prepared in the step (S1) into engineering slag soil with the water content of more than 60%, uniformly mixing, standing, and finishing in-situ treatment after the engineering slag soil reaches a soft plastic state.
2. The method for in-situ disposal of high water content engineering slag as defined in claim 1, wherein in said step S1, the ratio of the sum of the mass of calcined gypsum and uncalcined gypsum to the mass of bottom ash is (2-3): (6-7).
3. The method for in-situ treatment of high water content engineering slag according to claim 1 or 2, wherein the step S1 specifically comprises: mixing the uncalcined gypsum and the calcined gypsum, stirring uniformly, adding the bottom ash, stirring uniformly, adding the water glass, and stirring uniformly to obtain the cured material.
4. The in situ treatment method of high water content engineering slag according to claim 3, wherein the calcined gypsum is one or more selected from the group consisting of titanium hemihydrate gypsum, phosphogypsum hemihydrate and desulfurization hemihydrate gypsum.
5. The method for in-situ treatment of high water content engineering slag according to claim 4, wherein the calcined gypsum is prepared by calcining one or more of titanium dihydrate gypsum, phosphogypsum dihydrate and desulfurization dihydrate gypsum at 180-250 ℃ for 2-5 hours.
6. The method for in situ disposal of high moisture content engineering slag as defined in claim 3, wherein said uncalcined gypsum is selected from one or more of titanium dihydrate gypsum, phosphogypsum dihydrate and desulfurization dihydrate gypsum.
7. The in-situ treatment method of high-water-content engineering slag soil according to claim 1, wherein the modulus of the water glass is 1.0-1.5.
8. The in-situ treatment method of high water content engineering slag soil according to claim 1, wherein in the step S2, the mass of the solidified material is 10% -30% of the mass of the engineering slag soil.
9. The method for in-situ treatment of high water content engineering slag as defined in claim 1, wherein in step S2, the standing time is 2-12 hours.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH101667A (en) * | 1996-06-19 | 1998-01-06 | Terabondo:Kk | Semihydrated gypsum agent for improving water-containing soil |
| CN101579683A (en) * | 2009-05-27 | 2009-11-18 | 河海大学 | Phosphogypsum-sludge combined curing treatment method |
| CN102899048A (en) * | 2012-09-29 | 2013-01-30 | 浙江大学宁波理工学院 | Flue gas desulphuration gypsum-alkaline residue soil stabilizer |
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