CN110386805A - A kind of new sulfur aluminate-base mud/soft soil curing agent and its application method - Google Patents
A kind of new sulfur aluminate-base mud/soft soil curing agent and its application method Download PDFInfo
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- CN110386805A CN110386805A CN201910778879.5A CN201910778879A CN110386805A CN 110386805 A CN110386805 A CN 110386805A CN 201910778879 A CN201910778879 A CN 201910778879A CN 110386805 A CN110386805 A CN 110386805A
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- curing agent
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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
- C04B28/14—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 calcium sulfate cements
- C04B28/142—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements
- C04B28/144—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being a flue gas desulfurization product
-
- 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
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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)
- Treatment Of Sludge (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The invention discloses a kind of new sulfur aluminate-base sludge soft curing agent and its application method, curing agent includes sulphoaluminate cement clinker, desulfurized gypsum, strontium slag, γ-Al2O3Micro mist, calcined diatomite powder dissolve γ-Al with a certain amount of water in use, being uniformly mixed sulphoaluminate cement clinker, desulfurized gypsum, strontium slag2O3Micro mist and calcined diatomite powder, add mixture in solution later, chemically react, and obtain thick curing agent solution, are injected in mud or weak soil with curing agent solution for stirring mud or weak soil, or by the way of grouting.Curing agent curing time of the invention is fast, and water imbibition is strong, and solidification intensity is high, and hardener dose is few, and diatomite and γ-Al2O3With porous structure, also there is the water purifications effects such as adsorbing heavy metal in water, impurity, not will cause environmental pollution.
Description
Technical field
The present invention relates to the field of building materials, more particularly, to a kind of new sulfur aluminate-base mud/soft soil curing agent
And its application method.
Background technique
Soft soil foundation has the characteristics that intensity is low, bearing capacity is poor, settling amount is big, and not processed soft soil foundation can not conduct
Building lot directly uses.On the other hand, the mud heap buried place dug out in river and fish pond dredging engineering is faced with and weak soil
The similar problem of ground.The main reason for leading to soft soil foundation or poor mud heap buried place bearing capacity, is contained in weak soil or mud
There is a large amount of water (general up to 100% or more).By physical method (such as centrifugal dehydration, extrusion dehydration), mud can be sloughed
Or most Free water in weak soil, the water content of mud or weak soil after sloughing Free water can be reduced to 60% or so, at this time
Still there is a large amount of strong, weak bound water around soil particle.Treated to further decrease physical method mud or weak soil it is aqueous
Rate generally uses chemical curing agent, further consumes weak soil or silt by the chemical reaction of water in curing agent and mud or weak soil
Moisture in mud, to reach the mesh for reducing soft soil foundation or mud bearing capacity and stability raising, harmful substance spill-out
's.
The amount that ordinary portland cement used in the prior art consumes water during muddy water is less, to make weak soil or
The high-moistures solidification of the foundation such as mud, and reach biggish bearing capacity and stability, it needs using a large amount of cement, construction
Cost is significantly increased, also, excessive use ordinary portland cement, can generate a large amount of calcium hydroxide, leads to the silt after solidifying
The pH value of mud or weak soil etc. is significantly raised, saline Land.
Summary of the invention
It is an object of the invention to overcome drawbacks described above of the existing technology, it is strong to provide a kind of good fluidity, water imbibition
And will not generation environment pollution new sulfur aluminate-base mud/soft soil curing agent and its application method.
To achieve the above object, technical scheme is as follows:
A kind of new sulfur aluminate-base mud/soft soil curing agent, which is characterized in that including sulphoaluminate cement clinker, take off
Sulphur gypsum, strontium slag, γ-Al2O3Micro mist, calcined diatomite powder.
Preferably, the raw material including following parts by weight,
40~50 parts of the sulphoaluminate cement clinker；
15~25 parts of the desulfurized gypsum；
10~15 parts of the strontium slag；
γ-the Al2O35~10 parts of micro mist；
5~10 parts of the calcined diatomite powder.
Preferably, the calcined diatomite powder is 500 DEG C and the calcined diatomite powder of temperatures above.
Preferably, the sulphoaluminate cement clinker, desulfurized gypsum, strontium slag, γ-Al2O3Micro mist and calcined diatomite powder
Average grain diameter be respectively less than be equal to 50 μm be more than or equal to 5 μm.
Preferably, the γ-Al2O3The weight of micro mist is equal to the weight of the calcined diatomite powder.
A kind of application method of new sulfur aluminate-base mud/soft soil curing agent, which comprises the steps of:
Step S1: weighing the sulphoaluminate cement clinker, desulfurized gypsum and strontium slag of parts by weight as claimed in claim 2,
It stirs evenly；
Step S2: 5~10 times of sulphoaluminate cement clinker quality of water is weighed, parts by weight as claimed in claim 2 are dissolved
Several γ-Al2O3Micro mist and calcined diatomite powder are uniformly mixed；
Step S3: will mixture made from step S1 be added the resulting solution of step S2 in, stir evenly curing agent is molten
Liquid；
Step S4: curing agent solution made from step S3 is used to stir mud or weak soil, or is infused by the way of grouting
Enter in mud or weak soil.
Preferably, in the step S1, the sulphoaluminate cement clinker, desulfurized gypsum and strontium slag are milled to average grain
Diameter is less than or equal to 50 μm and is more than or equal to 5 μm.
Preferably, in the step S2, a certain amount of γ-Al is dissolved using ultrasonic mixing method2O3Micro mist and calcining diatom
Native powder.
Preferably, in the step S4, mud is stirred with curing agent solution or when weak soil, mud or weak soil and curing agent are molten
The quality proportioning of liquid is 20~30:1；When by the way of grouting, curing agent solution is first diluted, mud or weak soil and sulphur aluminic acid
The quality proportioning that the quality proportioning of salt cement clinker is 8~12:1 is 5~10:1.
Preferably, in the step S2, the γ-Al2O3The average grain diameter of micro mist and calcined diatomite powder be less than etc.
It is more than or equal to 5 μm in 50 μm.
It can be seen from the above technical proposal that curing agent of the invention is as the main component with sulphoaluminate cement clinker, with
Desulfurized gypsum is gelling agent, and (chemical formula is abbreviated as C to the calcium sulphoaluminate in sulphate aluminium cement4A3It $) can be with the sulphur in desulfurized gypsum
Sour calcium (being abbreviated as C $) and calcium hydroxide (being abbreviated as CH) chemically react, and consume the Free water in a large amount of mud or weak soil,
Entringite C is generated simultaneously6A$3H32With alumina gel phase AH3Two kinds of hydrated products, the Sr in strontium slag2+Can in desulfurized gypsum not
The strontium sulfate that chemical reaction generates microcrystalline state occurs for the calcium sulfate C $ of fully reacting, thus to reunion mud or weak soil particle hole
Gap is filled, and further increases the compression strength after solidifying, γ-Al2O3Micro mist and calcined diatomite all have activity, in water
It easily reacts in solution and generates Al2O3-SiO2Reticular structure product, the product have hole, and water imbibition is strong, have big ratio
Surface area, strong adsorption, it is possible to provide early stage cohesiveness, adsorbable calcium sulfate, calcium hydroxide, strontium sulfate and calcium sulphoaluminate etc., no
Reaction speed can only be accelerated, moreover, Al2O3-SiO2Reticular structure product can also be used as filler, make the mud after solidifying
Or structure of soft clay more consolidation, improve compression strength.Diatomite and γ-Al2O3With porous structure, also there is a huge sum of money in absorption water
The water purifications such as category, impurity effect.Therefore, not only curing time is fast, water imbibition is strong for curing agent of the invention, but also after improving solidification
Compression strength.
Specific embodiment
Specific embodiments of the present invention will be described in further detail below.
A kind of new sulfur aluminate-base mud/soft soil curing agent, including sulphoaluminate cement clinker, desulfurized gypsum, strontium slag,
γ-Al2O3Micro mist, calcined diatomite powder.Sulphoaluminate cement clinker is 42.5 grades of SAC industrial sulphate aluminium cements of purchase
Clinker, chemical composition ranges are as shown in table 1.Desulfurized gypsum also known as flue gas desulfurization gypsum, main ingredient are calcium sulfate.Strontium slag is strontium
SrCO is produced in salt industrial production3The solid waste being discharged afterwards, chemical composition range are as shown in table 2.γ-Al2O3Micro mist is
γ crystal form Al2O3Powder, wherein Al2O3Content is greater than 99wt.%.After calcined diatomite powder is 500 DEG C and temperatures above calcining
Diatomite powder.Above-mentioned each raw material can be commercially available.
1 sulphoaluminate cement clinker chemical composition range of table
| Chemical composition | CaO | Al2O3 | SO3 | Fe2O3 | SiO2 | It is other |
| Range | 36-43 | 28-40 | 8-15 | 1-3 | 3-10 | 5-10 |
2 strontium dreg chemistry compositing range of table
| Chemical composition | SrO | CaO | Al2O3 | SO3 | Fe2O3 | SiO2 | It is other |
| Range | 30-38 | 12-16 | 1-2 | 18-24 | 3-4 | 12-15 | 10-15 |
Calcined diatomite is active, and the microcellular structure with a large amount of ordered arrangements has water sorption, through ultra-fine
After crushing, specific surface area increases, and surface can increase, and therefore, the average grain diameter of calcined diatomite is preferably smaller than equal to 50 μm
More than or equal to 5 μm.
γ-Al2O3Micro mist is also active, is the solid material of a kind of porosity, high degree of dispersion, also there is very big ratio table
Area, micropore surface have absorption property and surface-active.Partial size is about small, and specific surface area is bigger, it is preferable that γ-Al2O3It is micro-
The average grain diameter of powder is less than or equal to 50 μm and is more than or equal to 5 μm.
Preferably, the average grain diameter of sulphoaluminate cement clinker, desulfurized gypsum, strontium slag is less than or equal to 50 μm more than or equal to 5 μ
m。
Preferably, above-mentioned aluminium sulfate base sludge soft curing agent is made of the raw material of following parts by weight: 40~50
Part sulphoaluminate cement clinker, 15~25 parts of desulfurized gypsums, 10~15 parts of strontium slags, 5~10 parts of γ-Al2O3Micro mist, 5~10 parts are forged
Burn diatomite powder.
When using above-mentioned curing agent, firstly, weighing a certain amount of sulphoaluminate cement clinker, desulfurized gypsum and strontium slag, stir
It mixes uniformly spare；Preferably, average grain diameter is ground to lower than 50 μm.
Then, the water for weighing 5~10 times of quality of sulphoaluminate cement clinker used, dissolves γ-Al2O3Micro mist and calcining silicon
Diatomaceous earth powder is uniformly mixed；Preferably, ultrasonic mixing is uniform.γ-Al2O3Micro mist is sent out in aqueous solution with calcined diatomite powder
Raw reaction generates Al2O3-SiO2Reticular structure product, this reaction speed is very fast, and early stage cohesiveness can be provided for curing sludge.
Al2O3-SiO2Reticular structure can effectively consolidate the molecule in mud/weak soil, and Al2O3And SiO2When individually acting on
Reticular structure can not be formed.In addition, γ-Al2O3Micro mist and calcined diatomite powder can not be with sulphoaluminate cement clinkers and de-
The hydration of the mixing of sulphur gypsum, sulphoaluminate cement clinker and gypsum will affect Al2O3-SiO2The generation of reticular structure.
Sulphoaluminate cement clinker, desulfurized gypsum and strontium slag mixed-powder after grinding is dissolved in γ-Al2O3Micro mist with forge
It burns in diatomite powder aqueous solution, stirs evenly, curing agent solution is made.In this step, in sulphoaluminate cement clinker
(chemical formula is abbreviated as C to calcium sulphoaluminate4A3$) can in desulfurized gypsum calcium sulfate (being abbreviated as C $) and calcium hydroxide (be abbreviated as
CH comes from desulfurized gypsum, and the main ingredient of desulfurized gypsum is CaSO4, but there is also a small amount of CH) it chemically reacts, it is specific anti-
It should be as shown in formula (1) and formula (2).
C4A3$+2C$+38H2O→C6A$3H32+2AH3 (1)
4C4A3$+8C$+6CH+90H2O→3C6A$3H32 (2)
Entringite C is generated while consuming a large amount of Free waters during above-mentioned two hydration reaction6A$3H32It is solidifying with aluminium
Glue phase AH3Two kinds of hydrated products, wherein gelatinous AH3Tiny mud or weak soil particle bonding can be become whole by product, and micro-
See the C that needle bar shape feature is presented in pattern6A$3H32Cross structure can provide carrier for sludge granules.
Sr in strontium slag2+Chemical reaction can occur with the complete calcium sulfate C $ of unreacted in desulfurized gypsum and generate microcrystalline state
Strontium sulfate further increase the compression strength after solidifying to be filled to reunion mud or weak soil pellet pores.
Al2O3-SiO2Reticular structure product has hole, and water imbibition is strong, has big specific surface area, and reactivity is high, inhales
Attached property is strong, and adsorbable calcium sulfate, calcium hydroxide, strontium sulfate and calcium sulphoaluminate etc. can not only accelerate reaction speed, moreover,
Al2O3-SiO2Reticular structure product can also be used as filler, make the mud after solidifying or structure of soft clay more consolidation, improve resistance to compression
Intensity.
Using above-mentioned preparation curing agent solution curing sludge or weak soil when, can be by curing agent solution and mud or weak soil
Solidified by physics mix, which is relatively often used handling mud or when weak soil at earth's surface, in general, mud or soft
The quality proportioning of soil and curing agent solution is 20~25:1.
Or be injected into a manner of grouting in the mud or weak soil of underground deep layer, when grouting, is becoming silted up to enhance curing agent
Mobility in mud or weak soil, it is preferable that underground is injected after diluting curing agent solution, in general, by curing agent obtained above
Solution is first diluted with water, and increases the mobility in mud or weak soil, at this point, modification are as follows: mud or weak soil and aluminium sulfate water
The quality proportioning of mud clinker is 8~12:1.
In conclusion curing time is fast, and water imbibition is strong when using curing agent curing sludge of the invention or weak soil, solidification
Intensity is high, and hardener dose is few, and diatomite and γ-Al2O3With porous structure, also there is adsorbing heavy metal in water, impurity etc.
Water purification effect, not will cause environmental pollution.
Embodiment 1
The present embodiment is to handle earth's surface weak soil using such aluminium sulfate base sludge curing agent.
The raw material of the present embodiment is a kind of 42.5R sulphoaluminate cement clinker (chemical composition is as shown in table 3), a kind of smoke evacuation
Desulfurized gypsum (uses Rietveld method to test its C $ content as 92.5wt.%), a kind of strontium slag (its chemical composition such as 4 institute of table
Show), a kind of γ-Al2O3Micro mist (Al2O3Content is 99.9wt.%, and average grain diameter is 45 μm), a kind of (calcining of calcined diatomite
550 DEG C of temperature, SiO in chemical component2It is 92.3%, average grain diameter is 42 μm).
Sulphoaluminate cement clinker chemical composition used in 3 example 1 of table
The composition of strontium dreg chemistry used in 4 example 1 of table
Such aluminium sulfate base sludge soft curing agent is made of the raw material of following parts by weight: 45 parts of aluminium sulfate water
Mud clinker, 20 parts of desulfurized gypsums, 15 parts of strontium slags, 10 parts of γ-Al2O3Micro mist, 10 parts of calcined diatomite powder.
Specifically used process are as follows:
1. sulphoaluminate cement clinker, desulfurized gypsum and strontium slag are weighed, using planetary ball mill to above-mentioned three kinds of former materials
Material carries out grinding and homogenizing, and the mixed-powder average grain diameter after grinding is 38.2 μm；
2. sulphoaluminate cement clinker 225 parts of water of quality used are weighed, by γ-Al2O3Micro mist and calcined diatomite powder exist
It is mixed in water, then using industrial ultrasonic dispersing apparatus to γ-Al2O3Micro mist and calcined diatomite powder mixed solution carry out 30
Minute ultrasonic treatment；
3. sulphoaluminate cement clinker, desulfurized gypsum and the strontium slag mixed-powder after grinding are dissolved in γ-Al2O3Micro mist with
In calcined diatomite powder aqueous solution, mixed solution is stirred using handheld stirring machine, curing agent solution is made；
4. the quality proportioning of mud/weak soil and curing agent is 20:1 by curing agent solution and weak soil direct mix.
Soft Soil Layer after solidifying 28d to untreated Soft Soil Layer and curing agent carries out core pulling sampling respectively, to sampling sample
The experiment such as axial compressive strength test, water cut test is carried out, experimental result comparison is as shown in table 5.
5 weak soil surface layer of table handles experimental result comparison
Embodiment 2:
The present embodiment is to handle 3-5m mud under earth's surface using such aluminium sulfate base sludge curing agent.
The raw material of the present embodiment is a kind of 42.5R sulphoaluminate cement clinker (chemical composition is as shown in table 6), a kind of smoke evacuation
Desulfurized gypsum (uses Rietveld method to test its C $ content as 91.1wt.%), a kind of strontium slag (its chemical composition such as 7 institute of table
Show), a kind of γ-Al2O3Micro mist (Al2O3Content is 99.9wt.%, and average grain diameter is 45 μm), a kind of (calcining of calcined diatomite
550 DEG C of temperature, SiO in chemical component2It is 92.3%, average grain diameter is 42 μm).
Sulphoaluminate cement clinker chemical composition used in 6 example 2 of table
The composition of strontium dreg chemistry used in 7 example 2 of table
Such aluminium sulfate base sludge soft curing agent is made of the raw material of following parts by weight: 50 parts of aluminium sulfate water
Mud clinker, 25 parts of desulfurized gypsums, 15 parts of strontium slags, 10 parts of γ-Al2O3Micro mist, 10 parts of calcined diatomite powder.
Specifically used process are as follows:
1. sulphoaluminate cement clinker, desulfurized gypsum and strontium slag are weighed, using planetary ball mill to above-mentioned three kinds of former materials
Material carries out grinding and homogenizing, and the mixed-powder average grain diameter after grinding is 36.7 μm；
2. sulphoaluminate cement clinker 250 parts of water of quality used are weighed, by γ-Al2O3Micro mist and calcined diatomite powder exist
It is mixed in water, then using industrial ultrasonic dispersing apparatus to γ-Al2O3Micro mist and calcined diatomite powder mixed solution carry out 30
Minute ultrasonic treatment；
3. sulphoaluminate cement clinker, desulfurized gypsum and the strontium slag mixed-powder after grinding are dissolved in γ-Al2O3Micro mist with
In calcined diatomite powder aqueous solution, mixed solution is stirred using handheld stirring machine, curing agent solution is made；
4. by curing agent solution with etc. quality water be mixed after thin pulp body and inject underground, the quality of mud and curing agent is matched
Than for 5:1.
Soft Soil Layer after solidifying 28d to untreated mud and curing agent carries out core pulling sampling respectively, to sampling sample
The experiment such as axial compressive strength test, water cut test is carried out, experimental result comparison is as shown in table 8.
The comparison of 8 deep layer processing soft soil experimental result of table
Embodiment 3
The present embodiment is to handle earth's surface weak soil using such aluminium sulfate base sludge curing agent.
The raw material of the present embodiment is a kind of 42.5R sulphoaluminate cement clinker (chemical composition is as shown in table 9), a kind of smoke evacuation
Desulfurized gypsum (uses Rietveld method to test its C $ content as 93.4wt.%), a kind of strontium slag (its chemical composition such as 10 institute of table
Show), a kind of γ-Al2O3Micro mist (Al2O3Content is 99.9wt.%, and average grain diameter is 45 μm), a kind of (calcining of calcined diatomite
550 DEG C of temperature, SiO in chemical component2It is 92.3%, average grain diameter is 42 μm).
Sulphoaluminate cement clinker chemical composition used in 9 example 3 of table
The composition of strontium dreg chemistry used in 10 example 3 of table
Such aluminium sulfate base sludge soft curing agent is made of the raw material of following parts by weight: 40 parts of aluminium sulfate water
Mud clinker, 15 parts of desulfurized gypsums, 10 parts of strontium slags, 5 parts of γ-Al2O3Micro mist, 5 parts of calcined diatomite powder.
Specifically used process are as follows:
1. sulphoaluminate cement clinker, desulfurized gypsum and strontium slag are weighed, using planetary ball mill to above-mentioned three kinds of former materials
Material carries out grinding and homogenizing, and the mixed-powder average grain diameter after grinding is 27.8 μm；
2. sulphoaluminate cement clinker 200 parts of water of quality used are weighed, by γ-Al2O3Micro mist and calcined diatomite powder exist
It is mixed in water, then using industrial ultrasonic dispersing apparatus to γ-Al2O3Micro mist and calcined diatomite powder mixed solution carry out 30
Minute ultrasonic treatment；
3. sulphoaluminate cement clinker, desulfurized gypsum and the strontium slag mixed-powder after grinding are dissolved in γ-Al2O3Micro mist with
In calcined diatomite powder aqueous solution, mixed solution is stirred using handheld stirring machine, curing agent solution is made；
4. the quality proportioning of mud/weak soil and curing agent is 6:1 by curing agent solution and weak soil direct mix.
Soft Soil Layer after solidifying 28d to untreated Soft Soil Layer and curing agent carries out core pulling sampling respectively, to sampling sample
The experiment such as axial compressive strength test, water cut test is carried out, experimental result comparison is as shown in table 11.
11 weak soil surface layer of table handles experimental result comparison
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of new sulfur aluminate-base mud/soft soil curing agent, which is characterized in that including sulphoaluminate cement clinker, desulfurization
Gypsum, strontium slag, γ-Al2O3Micro mist, calcined diatomite powder.
2. new sulfur aluminate-base mud/soft soil curing agent according to claim 1, which is characterized in that including following heavy
The raw material of number are measured,
3. new sulfur aluminate-base mud/soft soil curing agent according to claim 1 or 2, which is characterized in that the calcining
Diatomite powder is 500 DEG C and the calcined diatomite powder of temperatures above.
4. new sulfur aluminate-base mud/soft soil curing agent according to claim 1 or 2, which is characterized in that the sulphur aluminium
Acid salt cement clinker, desulfurized gypsum, strontium slag, γ-Al2O3The average grain diameter of micro mist and calcined diatomite powder, which is respectively less than, is equal to 50 μ
M is more than or equal to 5 μm.
5. new sulfur aluminate-base mud/soft soil curing agent according to claim 1 or 2, which is characterized in that the γ-
Al2O3The weight of micro mist is equal to the weight of the calcined diatomite powder.
6. any new sulfur aluminate-base mud/soft soil curing agent application method of Claims 1 to 5, feature exist
In including the following steps:
Step S1: weighing the sulphoaluminate cement clinker, desulfurized gypsum and strontium slag of parts by weight as claimed in claim 2, stirring
Uniformly；
Step S2: 5~10 times of sulphoaluminate cement clinker quality of water is weighed, parts by weight as claimed in claim 2 are dissolved
γ-Al2O3Micro mist and calcined diatomite powder are uniformly mixed；
Step S3: mixture made from step S1 is added in the resulting solution of step S2, curing agent solution is stirred evenly to obtain；
Step S4: curing agent solution made from step S3 is used to stir mud or weak soil, or injects silt by the way of grouting
In mud or weak soil.
7. according to the method described in claim 6, it is characterized in that, in the step S1, the sulphoaluminate cement clinker takes off
Sulphur gypsum and strontium slag are milled to average grain diameter and are more than or equal to 5 μm less than or equal to 50 μm.
8. according to the method described in claim 6, it is characterized in that, dissolving one using ultrasonic mixing method in the step S2
Quantitative γ-Al2O3Micro mist and calcined diatomite powder.
9. according to the method described in claim 6, it is characterized in that, in the step S4, with curing agent solution stir mud or
When weak soil, the quality proportioning of mud or weak soil and curing agent solution is 20~30:1；When by the way of grouting, curing agent solution
It is first diluted, the quality proportioning that the quality proportioning of mud or weak soil and sulphoaluminate cement clinker is 8~12:1 is 5~10:1.
10. according to the method described in claim 6, it is characterized in that, in the step S2, the γ-Al2O3Micro mist and calcining
The average grain diameter of diatomite powder is to be more than or equal to 5 μm less than or equal to 50 μm.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN114988729B (en) * | 2022-06-28 | 2023-02-28 | 湖南科技大学 | Method for improving flexural strength of belite sulphoaluminate cement and application thereof |
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