CN110218073A - Dredging silt dehydrating and curing calcium and magnesium based composites and the preparation method and application thereof - Google Patents
Dredging silt dehydrating and curing calcium and magnesium based composites and the preparation method and application thereof Download PDFInfo
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- CN110218073A CN110218073A CN201910421800.3A CN201910421800A CN110218073A CN 110218073 A CN110218073 A CN 110218073A CN 201910421800 A CN201910421800 A CN 201910421800A CN 110218073 A CN110218073 A CN 110218073A
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- Prior art keywords
- dehydrating
- magnesium
- based composites
- dredging silt
- curing
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/34—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 cold phosphate binders
- C04B28/344—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 cold phosphate binders the phosphate binder being present in the starting composition solely as one or more phosphates
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
-
- 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
- C04B2111/00732—Uses not provided for elsewhere in C04B2111/00 for soil stabilisation
-
- 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
Abstract
The present invention provides a kind of dredging silt dehydrating and curing calcium and magnesium based composites and the preparation method and application thereof, it can effectively solve the problem that the problems such as dredging silt high-moisture percentage, low bearing capacity, low resistance to compression shearing strength, have mud through processing and have good physical and mechanical property.Dredging silt dehydrating and curing calcium and magnesium based composites provided by the present invention, in terms of dry powder, including following components: resin SAP:0.25~1wt.%, cement: 6~12wt.%, reheating MgO:6~15wt.%, magnesium phosphate: 8~22wt.%, metakaolin: 6~18wt.%, active MgO:6~15wt.%, magnesium chloride: 10~25wt.%, quick lime: 2~4wt.%, sodium metasilicate: 3~8wt.%, sodium hydroxide: 3~6wt.%, slag powders: 15~40wt.%, flyash: 10~30wt.%.
Description
Technical field
The invention belongs to the field of building materials, and in particular to a kind of dredging silt dehydrating and curing calcium and magnesium based composites and its
Preparation method and application.
Technical background
In China during inland lake, harbour tunnel and river bottom mud dredging dredging, inevitably result from a large amount of
High-moisture percentage (even as high as 200-300%), the dredging silt with certain pollution surrounding enviroment risk.These mud are usually viscous
Grain content is big, moisture content is high, shearing strength is low, bearing capacity is poor, distributes foul smell, long-term not only to occupy a large amount of plough without stacking
Ground, pollution land-based area environment, and be difficult to be directly used as engineered packings.Therefore, dredging silt dehydrating and curing cooperative disposal problem is
Pay much attention to difficult problems urgently to be resolved under environmental protection overall background in China.
Engineering discarded slurry at this stage generally the processing modes such as abandons using land landfill or off-lying sea, due to pollution environment,
It transports the disadvantages of disclosure risk is high and has and be gradually abandoned the possibility used, if will inevitably be occupied without appropriate disposition
Short land resource and pollution of ecological environment.Using solidification and stabilization processing method, i.e., curing materials are added into mud, effectively
The engineering characteristics such as intensity, deformation and permeability for improving mud are converted into discarded dredging silt and meet engineering specification, renewable
Utilize, low pollution even free of contamination geotechnical filling.Modified mud can be used as fill material after curing process, be applied to Road
The fields such as based filler, epeirogenetic filler meet China's sustainable development and solid waste resource regeneration theory.
Used curing materials are many kinds of when sludge solidification is disposed, and mainly include: lime, cement, steel slag, flyash etc.
Traditional material, but since dredging silt has the distinguishing features such as moisture content height, content of organic matter height, clay content height, tradition is solid
Change material usual diminishing and consolidation effect is not satisfactory or even curing agent volume is excessive causes to locate when such mud is dredged in processing
Manage high expensive.The above material mixture ratio type is single, cannot utilize the advantage of multiple material blending and magnesium-based composite material.Cause
This, research and development are suitable for the dehydrating and curing calcium and magnesium based composites of the economical and efficient of high-moisture percentage dredging silt, and substitution or part are replaced
For the maximum discharges high energy consumption material such as cement, lime, engineering significance and realistic price with higher.
Summary of the invention
The present invention is to carry out to solve the above-mentioned problems, and it is an object of the present invention to provide a kind of dredging silt dehydrating and curing calcium and magnesium
Based composites and the preparation method and application thereof have good dewatering brilliance, solidification effect, ecological, environmental protective, cost reasonable
The advantages that, it can effectively solve the problem that the problems such as dredging silt high-moisture percentage, low bearing capacity, low resistance to compression shearing strength, make mud through locating
Reason, which has, has good physical and mechanical property.
The present invention to achieve the goals above, uses following scheme:
<composite material>
The present invention provides a kind of dredging silt dehydrating and curing calcium and magnesium based composites, which is characterized in that in terms of dry powder, including
Following components: resin SAP:0.25~1wt.%, cement: 6~12wt.%, reheating MgO:6~15wt.%, magnesium phosphate: 8~
22wt.%, metakaolin: 6~18wt.%, active MgO:6~15wt.%, magnesium chloride: 10~25wt.%, quick lime: 2~
4wt.%, sodium metasilicate: 3~8wt.%, sodium hydroxide: 3~6wt.%, slag powders: 15~40wt.%, flyash: 10~
30wt.%, the sum of each component percentage are 100.
Preferentially, dredging silt dehydrating and curing calcium and magnesium based composites provided by the invention can also have the feature that
Activated magnesia is high activity MgO, and content of MgO >=92wt.%.
Preferably, dredging silt dehydrating and curing calcium and magnesium based composites provided by the invention can also have the feature that
Dead burned magnesia is low activity MgO, calcination temperature > 1200 DEG C, and content of MgO >=94wt.%.
Preferably, dredging silt dehydrating and curing calcium and magnesium based composites provided by the invention can also have the feature that
Magnesium chloride is pure to analyze, and MgCl2·6H2O content >=98wt.%.
Preferably, dredging silt dehydrating and curing calcium and magnesium based composites provided by the invention can also have the feature that
Magnesium phosphate is pure to analyze, and MgPO4Content >=95wt.%.
In addition, dredging silt dehydrating and curing calcium and magnesium based composites provided by the invention can also include: CaO in quick lime
Content >=95wt.%.
Preferably, dredging silt dehydrating and curing calcium and magnesium based composites provided by the invention can also have the feature that
Sodium metasilicate is dry powder sample, and Na2SiO3Content >=99wt.%.
Preferably, dredging silt dehydrating and curing calcium and magnesium based composites provided by the invention can also have the feature that
In flyash, Al2O3With SiO2The sum of mass percent >=70wt.%, and CaO content is without limiting.
Preferentially, dredging silt dehydrating and curing calcium and magnesium based composites provided by the invention can also have the feature that
Flyash is second class powered coal ash.
Preferentially, dredging silt dehydrating and curing calcium and magnesium based composites provided by the invention can also have the feature that
Slag powders are ground granulated blast furnace slag, and Al in slag2O3+SiO2+ CaO content >=85wt.%.
Preferentially, dredging silt dehydrating and curing calcium and magnesium based composites provided by the invention can also have the feature that
Cement is ordinary portland cement.
Preferentially, dredging silt dehydrating and curing calcium and magnesium based composites provided by the invention can also have the feature that
Sodium hydroxide is high purity N aOH dry powder, NaOH content >=99%.
<preparation method>
Further, the present invention also provides a kind of methods for preparing dredging silt dehydrating and curing calcium and magnesium based composites, special
Sign is, comprising: weighs the dry powder of each component, resin SAP:0.25~1wt.%, cement: 6~12wt.%, weight according to the proportion
Burn MgO:6~15wt.%, magnesium phosphate: 8~22wt.%, metakaolin: 6~18wt.%, active MgO:6~15wt.%, chlorine
Change magnesium: 10~25wt.%, quick lime: 2~4wt.%, sodium metasilicate: 3~8wt.%, sodium hydroxide: 3~6wt.%, slag powders:
15~40wt.% and flyash: 10~30wt.%；Then it is mixed and uniform mix, it is solid to obtain dredging silt dehydration
Change calcium and magnesium based composites.
<application>
Further, the present invention also provides dredging silt dehydrating and curing calcium and magnesium based composites in soft soil foundation and construction slurry
Application in reinforcing.
The action and effect of invention
Dredging silt dehydrating and curing calcium and magnesium based composites disclosed by the invention, technical principle are: resin SAP being capable of benefit
With itself containing the strong hydrophilicities such as carboxyl, hydroxyl group and have the characteristics that the water-swellable type high molecular polymer of certain degree of cross linking,
It absorbs moisture rapidly and is substantially reduced mud initial aqueous rate, can reach the effect of water reducing and strength increasing in the short time；Common silicic acid
Salt cement meets water and hydration reaction occurs rapidly, generates hydrated calcium silicate C-S-H, drated calcium aluminate C-A-H and Ca (OH)2, and seek
High alkalinity high ph-values solution environmental is made, mud early strength can be promoted to be promoted rapidly；Quick lime meets water and is quickly generated Ca (OH)2And
Certain heat is released, plays a dual role of accelerating moisture evaporation, promote water transform, the fast dewatering from chemical reaction initial stage
Thickening power；High activity MgO is reacted with water generates Mg (OH)2, it is possible to provide simultaneously generating body product expands and causes compacted alkaline environment
Effect, activity MgO is chemically reacted with magnesium chloride at the same time, produces 518 phases (5Mg (OH)2·MgCl2·
8H2O, it is 5 phases) and 318 phase (3MgO1MgCl2·8H2O, it is 3 phases) crystal, plays hole filling and particle cementation
And mud early strength is promoted to improve；Ca(OH)2With Mg (OH)2NaOH, sodium metasilicate equal excitation agent can be combined as hydrated product,
The potential active component of the mineral materials such as Cooperative Excitation ore slag fly ash induces and generates pozzolanic reaction and generate hydrated calcium silicate
The agglutinates such as C-S-H, hydrated magnesium silicate M-S-H and sodium base alumino-silicate N-A-S-H can effectively ensure to maintain solidification for a long time
The later strength and long-time stability of mud；Flyash itself has particles filled effect, and (80% particle size is powder, glues
Grain) micro- filling effect can be played with hole between filler particles/reunion；NaOH, sodium metasilicate can excite in metakaolin
Aluminosilicate ingredient generates aquation sodium aluminosilicate N-A-S-H colloid through the effect of the sequence of chemical such as ground polymerization and continues to occur hard
Change coagulation, the long-term strength and long-time stability of curing sludge can be effectively improved.Reheating MgO and magnesium phosphate mixture are rapid
Acid-base neutralization reaction occurs, a kind of magnesium phosphate salt chemical bonding materials of generation, with early strength height, rate of set is fast, condenses
The advantages that time is short；The above acts on coordinated, and then can effectively increase curing sludge compression strength and durability
Energy.
Compared with the prior art, the advantages of the present invention are as follows: in conjunction with alkaline excitation, homopolymer polymerization and calcium and magnesium base rubber coagulate material
A variety of reaction principles such as material, large trade waste material such as abundant utilization of resources slag and flyash, introducing high activity MgO,
The green low-carbons material such as reheating MgO, magnesium chloride and magnesium phosphate by adjusting pH level, effectively facilitates aquation process and swashs
Aluminosilicate mineral active component etc. is sent out, reaches the macro-effect of water reducing and strength increasing, improves the environment friendly of curing materials.This hair
The bright layer compaction effect with good early strength height, endurance quality, stable long-term strength and abundant chemical reaction process, can
For fields such as dredging silt, construction slurry and Soft Grounds, cured processing dredging silt can be used as roadbed filling and
Backfill soil etc..
Specific embodiment
Below to dredging silt dehydrating and curing calcium and magnesium based composites of the present invention and the preparation method and application thereof
Specific embodiment is described in detail.
<embodiment one>
In the present embodiment one, the method for preparing dredging silt dehydrating and curing calcium and magnesium based composites are as follows:
Each component is weighed according to the proportion: resin SAP 0.5wt.%, cement 6wt.%, reheating MgO 8wt.%, magnesium phosphate
13wt.%, metakaolin 8wt.%, active MgO 8wt.%, magnesium chloride 10wt.%, quick lime 3wt.%, sodium metasilicate
3wt.%, sodium hydroxide 5.5wt.%, slag powders 20wt.%, flyash 15wt.%；Then it is mixed and uniform mix, is obtained
To dredging silt dehydrating and curing calcium and magnesium based composites.
Performance test:
250kg dehydrating and curing calcium and magnesium based composites are mixed in every cubic metre of mud, mud initial aqueous rate is set as
120%, after mud and dehydrating and curing calcium and magnesium based composites uniform stirring, the sample of diameter 50mm, height 100mm are prepared,
Standard curing demoulds after 3 days, and continues maintenance to 7 days and 28 days, and each age is carried out anti-without lateral confinement using three parallel samples
Compressive Strength.Curing sludge can reach 1.117MPa, 1.913MPa 7 days and 28 days curing age mean intensities, support within 7 days and 28 days
Length of service as a nurse phase average moisture content can reach 50.3%, 36.9%.
<embodiment two>
In the present embodiment two, the method for preparing dredging silt dehydrating and curing calcium and magnesium based composites are as follows:
Each component is weighed according to the proportion: resin SAP 0.5wt.%, cement 6wt.%, reheating MgO 8wt.%, magnesium phosphate
13wt.%, metakaolin 8wt.%, active MgO 6wt.%, magnesium chloride 10wt.%, quick lime 3wt.%, sodium metasilicate
6wt.%, sodium hydroxide 4.5wt.%, slag powders 20wt.%, flyash 15wt.%；Then it is mixed and uniform mix, is obtained
To dredging silt dehydrating and curing calcium and magnesium based composites.
Performance test:
250kg dehydrating and curing calcium and magnesium based composites are mixed in every cubic metre of mud, mud initial aqueous rate is set as
120%, after mud and dehydrating and curing calcium and magnesium based composites uniform stirring, diameter 50mm, height 100mm sample are prepared, is marked
Quasi- maintenance demoulds after 3 days, and continues maintenance to 7 days and 28 days, and each age is carried out using three parallel samples without lateral confinement resistance to compression
Intensity.Curing sludge can reach 1.043MPa, 1.722MPa 7 days and 28 days curing age mean intensities, conserve within 7 days and 28 days
Age average moisture content can reach 52.3%, 37.6%.
<embodiment three>
In the present embodiment three, the method for preparing dredging silt dehydrating and curing calcium and magnesium based composites are as follows:
Each component is weighed according to the proportion: resin SAP 0.5wt.%, cement 6wt.%, reheating MgO 10.5wt.%, phosphoric acid
Magnesium 15wt.%, metakaolin 8wt.%, active MgO 8wt.%, magnesium chloride 12wt.%, quick lime 2wt.%, sodium metasilicate
3wt.%, sodium hydroxide 3wt.%, slag powders 20wt.%, flyash 12wt.%；Then it is mixed and uniform mix, is obtained
Dredging silt dehydrating and curing calcium and magnesium based composites.
Performance test:
250kg dehydrating and curing calcium and magnesium based composites are mixed in every cubic metre of mud, mud initial aqueous rate is set as
120%, after mud and dehydrating and curing calcium and magnesium based composites uniform stirring, diameter 50mm, height 100mm sample are prepared, is marked
Quasi- maintenance demoulds after 3 days, and continues maintenance to 7 days and 28 days, and each age is carried out using three parallel samples without lateral confinement resistance to compression
Intensity.Curing sludge can reach 1.342MPa, 2.133MPa 7 days and 28 days curing age mean intensities, conserve within 7 days and 28 days
Age average moisture content can reach 54.7%, 39.2%.
<example IV>
In the present embodiment four, the method for preparing dredging silt dehydrating and curing calcium and magnesium based composites are as follows:
Each component is weighed according to the proportion: resin SAP 0.5wt.%, cement 6wt.%, reheating MgO 8wt.%, magnesium phosphate
10wt.%, metakaolin 6.5wt.%, active MgO 6wt.%, magnesium chloride 10wt.%, quick lime 2wt.%, sodium metasilicate
3wt.%, sodium hydroxide 3wt.%, slag powders 30wt.%, flyash 15wt.%；Then it is mixed and uniform mix, is obtained
Dredging silt dehydrating and curing calcium and magnesium based composites.
Performance test:
250kg dehydrating and curing calcium and magnesium based composites are mixed in every cubic metre of mud, mud initial aqueous rate is set as
120%, after mud and dehydrating and curing calcium and magnesium based composites uniform stirring, diameter 50mm, height 100mm sample are prepared, is marked
Quasi- maintenance demoulds after 3 days, and continues maintenance to 7 days and 28 days, and each age is carried out using three parallel samples without lateral confinement resistance to compression
Intensity.Curing sludge can reach 1.488MPa, 2.341MPa 7 days and 28 days curing age mean intensities, conserve within 7 days and 28 days
Age average moisture content can reach 45.5%, 28.4%.
<embodiment five>
In the present embodiment five, the method for preparing dredging silt dehydrating and curing calcium and magnesium based composites are as follows:
Each component is weighed according to the proportion: resin SAP 1wt.%, cement 6wt.%, reheating MgO8wt.%, magnesium phosphate
12wt.%, metakaolin 12wt.%, active MgO 8wt.%, magnesium chloride 10wt.%, quick lime 3wt.%, sodium metasilicate
Then 3wt.%, sodium hydroxide 3wt.%, slag powders 24wt.%, flyash 10wt.% are mixed and uniform mix, are obtained
Dredging silt dehydrating and curing calcium and magnesium based composites.
Performance test:
250kg dehydrating and curing calcium and magnesium based composites are mixed in every cubic metre of mud, mud initial aqueous rate is set as
120%, after mud and dehydrating and curing calcium and magnesium based composites uniform stirring, diameter 50mm, height 100mm sample are prepared, is marked
Quasi- maintenance demoulds after 3 days, and continues maintenance to 7 days and 28 days, and each age is carried out using three parallel samples without lateral confinement resistance to compression
Intensity.Curing sludge can reach 1.247MPa, 1.996MPa 7 days and 28 days curing age mean intensities, conserve within 7 days and 28 days
Age average moisture content can reach 53.7%, 32.4%.
In the above various embodiments, the super absorbent resin SAP white in appearance of use, graininess, main component are low
Cross linked sodium polyacrylate (accounting 88wt.%) and crosslinking agent (accounting 0.75wt.%), fineness are 200-400 mesh；Slag powders are
Ground granulated blast furnace slag, Al2O3+SiO2+ CaO content >=90wt.%；Magnesium phosphate is to analyze pure, MgPO4Content >=95wt.%；
Flyash is second class powered coal ash；Magnesium chloride is to analyze pure, MgCl2·6H2O content >=98wt.%；Cement is normal silicate
Cement；Magnesia is extra light calcined magnesia, and content of MgO >=90wt.%；Sodium hydroxide is dry powder, NaOH content >=
99wt.%；Quick lime is dry powder, CaO content >=95wt.%；Al in flyash2O3+SiO2Content >=70wt.% and CaO content
< 10wt.%.
To sum up, integrated use alkaline excitation of the present invention, the reaction principles such as homopolymer polymerization and calcium and magnesium based cementitious material, pass through
Itself component additive amount and component proportion are adjusted, large material such as industry byproduct slag powders, flyash is made full use of, only contains
A small amount of cement, lime, effectively overcome conventional curing material disadvantage.The present invention is good with early epistasis energy, condensation setting rate is fast, long
The advantages that phase good stability and good durability, can obviously solve the problems such as mud moisture content is high, compressibility is high, shearing strength is low,
Reproducible utilization geotechnical filling is converted by discarded dredging silt, reaches good solidification effect and economic effect.
In addition, above embodiments are only the illustration done to technical solution of the present invention.It is according to the present invention to dredge
It dredges sludge dewatering and solidifying calcium and magnesium based composites and is not merely defined in described content in the embodiment above, but with power
Benefit requires subject to limited range.Any modification that those skilled in the art of the invention are made on the basis of the embodiment
Supplement or equivalence replacement, all in claim range claimed of the invention.
Claims (10)
1. a kind of dredging silt dehydrating and curing calcium and magnesium based composites, which is characterized in that in terms of dry powder, including following components:
Resin SAP:0.25~1wt.%, cement: 6~12wt.%, reheating MgO:6~15wt.%, magnesium phosphate: 8~
22wt.%, metakaolin: 6~18wt.%, active MgO:6~15wt.%, magnesium chloride: 10~25wt.%, quick lime: 2~
4wt.%, sodium metasilicate: 3~8wt.%, sodium hydroxide: 3~6wt.%, slag powders: 15~40wt.%, flyash: 10~
30wt.%.
2. dredging silt dehydrating and curing calcium and magnesium based composites according to claim 1, it is characterised in that:
Wherein, the activated magnesia is high activity MgO, and content of MgO >=92wt.%.
3. dredging silt dehydrating and curing calcium and magnesium based composites according to claim 1, it is characterised in that:
Wherein, the dead burned magnesia is low activity MgO, calcination temperature > 1200 DEG C, and content of MgO >=94wt.%.
4. dredging silt dehydrating and curing calcium and magnesium based composites according to claim 1, it is characterised in that:
Wherein, the magnesium chloride is pure to analyze, and MgCl2·6H2O content >=98wt.%.
5. dredging silt dehydrating and curing calcium and magnesium based composites according to claim 1, it is characterised in that:
Wherein, the magnesium phosphate is pure to analyze, and MgPO4Content >=95wt.%.
6. dredging silt dehydrating and curing calcium and magnesium based composites according to claim 1, it is characterised in that:
Wherein, CaO content >=95wt.% in the quick lime.
7. dredging silt dehydrating and curing calcium and magnesium based composites according to claim 1, it is characterised in that:
Wherein, the sodium metasilicate is dry powder sample, and Na2SiO3Content >=99wt.%.
8. dredging silt dehydrating and curing calcium and magnesium based composites according to claim 1, it is characterised in that:
Wherein, in the flyash, Al2O3With SiO2The sum of mass percent >=70wt.%, and CaO content is unlimited
It is fixed.
9. a kind of method for preparing dredging silt dehydrating and curing calcium and magnesium based composites characterized by comprising
Weigh each component according to the proportion, resin SAP:0.25~1wt.%, cement: 6~12wt.%, reheating MgO:6~
15wt.%, magnesium phosphate: 8~22wt.%, metakaolin: 6~18wt.%, active MgO:6~15wt.%, magnesium chloride: 10~
25wt.%, quick lime: 2~4wt.%, sodium metasilicate: 3~8wt.%, sodium hydroxide: 3~6wt.%, slag powders: 15~
40wt.% and flyash: 10~30wt.%；Then it is mixed and uniform mix, obtains dredging silt dehydrating and curing calcium
Magnesium-based composite material.
10. dredging silt dehydrating and curing calcium and magnesium based composites described in any one of claim 1 to 8 in soft soil foundation and
Application in construction slurry reinforcing.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110590206A (en) * | 2019-10-15 | 2019-12-20 | 东南大学 | Method for carrying out internal curing on magnesium phosphate cement by doping super-absorbent resin |
| CN111732396A (en) * | 2020-06-04 | 2020-10-02 | 中国科学院武汉岩土力学研究所 | Alkali-activated vertical anti-seepage material and preparation method thereof |
| CN112321231A (en) * | 2020-11-03 | 2021-02-05 | 江苏叁山生态环境发展有限公司 | Formula and preparation method of polymer composite flowing type dredging sludge solidified soil |
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|---|---|---|---|---|
| CN106082903A (en) * | 2016-06-17 | 2016-11-09 | 武汉大学 | A kind of dredging silt composite curing agent |
| CN108675751A (en) * | 2018-05-25 | 2018-10-19 | 武汉大学 | A kind of environment-friendly type mud composite curing agent |
-
2019
- 2019-05-21 CN CN201910421800.3A patent/CN110218073A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106082903A (en) * | 2016-06-17 | 2016-11-09 | 武汉大学 | A kind of dredging silt composite curing agent |
| CN108675751A (en) * | 2018-05-25 | 2018-10-19 | 武汉大学 | A kind of environment-friendly type mud composite curing agent |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110590206A (en) * | 2019-10-15 | 2019-12-20 | 东南大学 | Method for carrying out internal curing on magnesium phosphate cement by doping super-absorbent resin |
| CN111732396A (en) * | 2020-06-04 | 2020-10-02 | 中国科学院武汉岩土力学研究所 | Alkali-activated vertical anti-seepage material and preparation method thereof |
| CN112321231A (en) * | 2020-11-03 | 2021-02-05 | 江苏叁山生态环境发展有限公司 | Formula and preparation method of polymer composite flowing type dredging sludge solidified soil |
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Application publication date: 20190910 |