CN109896809A - Composite curing agent and preparation method thereof - Google Patents
Composite curing agent and preparation method thereof Download PDFInfo
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- CN109896809A CN109896809A CN201711290548.4A CN201711290548A CN109896809A CN 109896809 A CN109896809 A CN 109896809A CN 201711290548 A CN201711290548 A CN 201711290548A CN 109896809 A CN109896809 A CN 109896809A
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- curing agent
- composite curing
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- gypsum
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Abstract
The invention discloses a kind of composite curing agent and preparation method thereof, it is related to solidifying agent material more particularly to a kind of composite curing agent and preparation method thereof of harbour blowing-filling sludge soft foundation processing.A kind of composite curing agent of the invention characterized by comprising fluidization bed fly ash, cement, gypsum, anhydrous sodium sulphate and SAP super absorbent resin superfine powder；The invention also includes a kind of methods for preparing above-mentioned composite curing agent.The present invention is compared with prior art: in the composite curing agent volume 10-20% to water content 20%-60% mud, forming pile foundation or composite foundation by stirring.Compressive strength reaches 1-2MPa after the mud of no bearing capacity is cured, and the volume stability and Frost Resistance energy of freeze proof line expansion and water-fast softening performance greatly improve, and composite foundation is made to have 60-200t/m2Bearing capacity.
Description
Technical field
The present invention relates to curing agent fields more particularly to a kind of composite curing agent and preparation method thereof.
Background technique
With the fast development of China's urban modernization, Underground environment problem becomes increasingly conspicuous.In Urban Underground structure
In construction, such as: subway tunnel shield excavates, and Pile Foundation of Highrise Building construction, municipal pipeline jacking etc. produces a large amount of waste sludge
Slurry.Show according to incompletely statistics: only in Shanghai, 8.7 ten thousand m will be generated by building a subway station3Discarded slurry, digging diameter 6m
Every kilometer of 6.8 ten thousand m of generation discarded slurry of subway tunnel3, by the end of the year 2015, Shanghai Underground is completed 366, station, tunnel
617 kilometers of total length, about 74,000,000 m of discarded slurry total output3.Currently, the domestic disposition for engineering discarded slurry dissolves lance
Shield does not cause enough attention also, so that discarded slurry is directly discharged river or good farmland by some illegal units, has caused river
Silting destroys a series of environmental issues such as arable land.Some developed countries such as Japan, the U.S., have formed discarded slurry disposition
Scientific mode (that is: collection-processing-consumption-recycling), by curing agent treated mud, mainly as construction material,
Forest land or farmland development, garbage loading embeading and sea reclamation etc., wherein be directly used as construction material and land use account for 70% with
On.Therefore, the research and development of discarded slurry curing agent have become resource regeneration and environmental-friendly important topic in China's urban development.
The limestone desulfurizer of the prior art is more and more applied in Fluidized Bed Boiler, the industrial residue of boiler combustion
Fluidization bed fly ash/Desulphurization is formed after dedusting is collected, compared to the pulverized-coal fired boiler fine coal being widely used in commerical ready-mixed concrete
Ash (generates 1300 DEG C of temperature or more), and industrial residue fluidization bed fly ash generation temperature is low (850-900 DEG C), containing big in ingredient
Free calcium oxide, gypsum, aluminium oxide, silica isoreactivity material are measured, in the case where alkaline (and salt) excitation and other methods are modified
There are the good hydraulicity and water resistant softening performance.But fluidization bed fly ash limits and because of ingredient to concrete mix workability
Influence is very big, is very difficult to apply in commerical ready-mixed concrete, while very big dust pollution being caused to bear.
Summary of the invention
The present invention gives a kind of composite curing agent to efficiently solve the above technical problem, which is characterized in that packet
It includes: fluidization bed fly ash, cement, gypsum, anhydrous sodium sulphate, SAP super absorbent resin superfine powder, in which:
Fluidization bed fly ash accounts for the 20~30% of the mass percent of the composite curing agent；
Cement accounts for the 5~12% of the mass percent of the composite curing agent；
Gypsum accounts for the 5~12% of the mass percent of the composite curing agent；
Anhydrous sodium sulphate accounts for the 0.5~0.8% of the mass percent of the composite curing agent；
SAP super absorbent resin superfine powder accounts for the 0.05~0.1% of the mass percent of the composite curing agent.
According to above-described composite curing agent, preferably: fluidization bed fly ash is I grade of high-calcium type flyash.
According to above-described composite curing agent, preferably: the specification of anhydrous sodium sulphate be it is powdered, purity be 98% or more.
According to above-described composite curing agent, preferably: cement is 4.25# ordinary portland cement.
According to above-described composite curing agent, preferably: gypsum is semi-hydrated gypsum, and purity is 99% or more.
According to above-described composite curing agent, preferably: SAP super absorbent resin superfine powder is methyl methacrylate
Ester.
A kind of preparation method of composite curing agent, it is characterised in that, the following steps are included:
Step 1 adds cement, gypsum, anhydrous sodium sulphate in fluidization bed fly ash, is sealed and is stirred until homogeneous, mixed
Close object one；
Step 2 mixes SAP super absorbent resin superfine powder in mixture one, obtains mixture two；
Mixture two is continued to stir and be rolled, obtains the composite curing agent by step 3；
It is preferred that: the various substances of above-mentioned steps are added according to each material proportion.
According to the preparation method of above-described composite curing agent, preferably: in step 1, whipping temp is 10-20 DEG C.
According to the preparation method of above-described composite curing agent, preferably: in step 2, mixing SAP in mixture one
The speed of super absorbent resin superfine powder is 10~30kg/min.
According to the preparation method of above-described composite curing agent, preferably: in step 3, passing through blender and pulverizer
2 10~30min of mixture is stirred and rolled, the composite curing agent is obtained.
In composite curing agent volume 10-20% of the invention to water content 20%-60% mud, formed by stirring
Pile foundation or composite foundation.Compressive strength reaches 1-2MPa after the mud of no bearing capacity is cured, and the volume of freeze proof line expansion is steady
Qualitative and Frost Resistance energy and water-fast softening performance greatly improve, and composite foundation can achieve 60-200t/m2Carrying energy
Power.
Detailed description of the invention
Attached drawing 1 is a kind of flow chart of the preparation method of composite curing agent of the present invention.
Specific embodiment
A kind of preferred embodiment 1
Attached drawing 1 is a kind of flow chart of the preparation method of composite curing agent of the present invention.
A kind of composite curing agent, it is characterised in that, it include: fluidization bed fly ash, cement, gypsum, anhydrous sodium sulphate, SAP high suction
Water-base resin superfine powder, in which:
Fluidization bed fly ash accounts for the 20~30% of the mass percent of the composite curing agent；
Cement accounts for the 5~12% of the mass percent of the composite curing agent；
Gypsum accounts for the 5~12% of the mass percent of the composite curing agent；
Anhydrous sodium sulphate accounts for the 0.5~0.8% of the mass percent of the composite curing agent；
SAP super absorbent resin superfine powder accounts for the 0.05~0.1% of the mass percent of the composite curing agent.
According to above-described composite curing agent, preferably: fluidization bed fly ash is I grade of high-calcium type flyash.High calcium fine coal
Ash is the higher flyash of a kind of calcium oxide component that thermal power plant is given off using lignite, ub-bituminous coal as fuel, is
A kind of not only material containing certain amount hydraulicity crystalline mineral but also containing potential activity substance.High-calcium fly ass due to containing compared with
High CaO content, therefore active height, can self-solidifying, from hard, particle is thin, the more low performance characteristic of water requirement.But high-calcium powder
Free calcium oxide in coal ash is generally 2%~3% or bigger, since the CaO of this part free state is produced in hydration process
It gives birth to volume expansion and potentially affects volume stability.But due to levigate high-calcium fly ass, crystal structure is more loose, crystal grain compared with
Small, hydration activity is larger, therefore this f-CaO aquation comparatively fast may not easily cause local swelling stress to concentrate, be unlikely to body
Product stability constitutes serious consequence.
According to above-described composite curing agent, preferably: the specification of anhydrous sodium sulphate be it is powdered, purity be 98% or more.It is high
The thin Disodium sulfate decahydrate of purity, particle is known as anhydrous sodium sulphate, is exposed to air and is easy water suction generation Disodium sulfate decahydrate, ten hydrations
Sodium sulphate is commonly called as saltcake.Anhydrous sodium sulphate, crystallization that is white, odorless, having bitter taste or powder, there is hygroscopicity.Shape be it is colourless, transparent,
Big crystallization or graininess little crystallization.The anhydrous sodium sulphate of high-purity generates hydrated product calcium sulphoaluminate quickly, to accelerate
The hydration and hardening speed of cement.
According to above-described composite curing agent, preferably: cement is 4.25# ordinary portland cement.Portland cement is
Portland clinker based on calcium silicates, 5% lime stone or granulated blast-furnace slag below, it is manufactured that proper amount of gypsum is levigate
Hydraulic cementing materials.The additional amount of the mixing material of ordinary portland cement is depending on the active size that it has.In pressing
National standard regulation: it as added active addition, such as granulated blast-furnace slag, volcanic ash, flyash in ordinary cement, adds
Amount must not exceed 15% by weight, allow to be replaced with the kiln ash no more than 5% or the nonactive mixing material no more than 10%；
Adding nonactive mixing material must not exceed 10%.
According to above-described composite curing agent, preferably: gypsum is semi-hydrated gypsum, and purity is 99% or more.Industrially will
Gypsum is heated to 150 DEG C and is dehydrated into semi-hydrated gypsum.It is cement rate modifier that semi-hydrated gypsum, which is used as, to control its setting rate.
According to above-described composite curing agent, preferably: SAP super absorbent resin superfine powder is methyl methacrylate
Ester.Super absorbent resin is a kind of novel high molecular material, it can absorb the moisture of own wt hundred times to thousand times, nothing
It is malicious, harmless, pollution-free；Water absorbing capacity extra-heavy, water holding capacity is extra-high, is obtained by the heavy polymer that acroleic acid polymerization obtains
To high moisture-holding capacity, the balance of uptake under high load capacity, absorb water point cannot be squeezed out by simple physical method, and can release repeatedly
Water, water suction.Methyl methacrylate has the characteristics of low-temperature setting, rapid curing, superpower uvioresistant, has natural hardness
With the balance of toughness, wearability, weatherability, high-low temperature resistant be poor: the advantages that -20~+70 DEG C, many physical chemistry and usability
Significant particular advantages can be all had.
A kind of preparation method of composite curing agent, it is characterised in that, the following steps are included:
Step 1, use windproof precisely balance (precision 0.001g) to fluidized bed in the laboratory that room temperature is 15 DEG C
Flyash, cement, gypsum, anhydrous sodium sulphate are weighed, and cement, gypsum, anhydrous sodium sulphate are added in fluidization bed fly ash, is sealed
It is stirred until homogeneous, obtains mixture one；
Step 2 mixes SAP super absorbent resin superfine powder in mixture one, obtains mixture two；
Mixture two is continued to stir and be rolled, obtains the composite curing agent by step 3.
It is preferred that: the various substances of above-mentioned steps are added according to each material proportion.
According to the preparation method of above-described composite curing agent, preferably: in step 1, whipping temp is 10~20
℃。
According to the preparation method of above-described composite curing agent, preferably: in step 2, mixing SAP in mixture one
The speed of super absorbent resin superfine powder is 10~30kg/min.
According to the preparation method of above-described composite curing agent, preferably: in step 3, passing through blender and pulverizer
2 10~30min of mixture is stirred and rolled, the composite curing agent is obtained.
A kind of preferred embodiment 2
Attached drawing 1 is a kind of flow chart of the preparation method of composite curing agent of the present invention.
A kind of composite curing agent, it is characterised in that, it include: fluidization bed fly ash, cement, gypsum, anhydrous sodium sulphate, SAP high suction
Water-base resin superfine powder, in which:
Fluidization bed fly ash accounts for the 25~28% of the mass percent of the composite curing agent；
Cement accounts for the 6~10% of the mass percent of the composite curing agent；
Gypsum accounts for the 6~10% of the mass percent of the composite curing agent；
Anhydrous sodium sulphate accounts for the 0.6~0.7% of the mass percent of the composite curing agent；
SAP super absorbent resin superfine powder accounts for the 0.06~0.09% of the mass percent of the composite curing agent.
According to above-described composite curing agent, preferably: fluidization bed fly ash is I grade of high-calcium type flyash.High calcium fine coal
Ash is the higher flyash of a kind of calcium oxide component that thermal power plant is given off using lignite, ub-bituminous coal as fuel, is
A kind of not only material containing certain amount hydraulicity crystalline mineral but also containing potential activity substance.High-calcium fly ass due to containing compared with
High CaO content, therefore active height, can self-solidifying, from hard, particle is thin, the more low performance characteristic of water requirement.But high-calcium powder
Free calcium oxide in coal ash is generally 2%~3% or bigger, since the Ca0 of this part free state is produced in hydration process
It gives birth to volume expansion and potentially affects volume stability.But due to levigate high-calcium fly ass, crystal structure is more loose, crystal grain compared with
Small, hydration activity is larger, therefore this f-CaO aquation comparatively fast may not easily cause local swelling stress to concentrate, be unlikely to body
Product stability constitutes serious consequence.
According to above-described composite curing agent, preferably: the specification of anhydrous sodium sulphate be it is powdered, purity be 98% or more.It is high
The thin Disodium sulfate decahydrate of purity, particle is known as anhydrous sodium sulphate, is exposed to air and is easy water suction generation Disodium sulfate decahydrate, ten hydrations
Sodium sulphate is commonly called as saltcake.Anhydrous sodium sulphate, crystallization that is white, odorless, having bitter taste or powder, there is hygroscopicity.Shape be it is colourless, transparent,
Big crystallization or graininess little crystallization.The anhydrous sodium sulphate of high-purity generates hydrated product calcium sulphoaluminate quickly, to accelerate
The hydration and hardening speed of cement.
According to above-described composite curing agent, preferably: cement is 4.25# ordinary portland cement.Portland cement is
Portland clinker based on calcium silicates, 5% lime stone or granulated blast-furnace slag below, it is manufactured that proper amount of gypsum is levigate
Hydraulic cementing materials.The additional amount of the mixing material of ordinary portland cement is depending on the active size that it has.In pressing
National standard regulation: it as added active addition, such as granulated blast-furnace slag, volcanic ash, flyash in ordinary cement, adds
Amount must not exceed 15% by weight, allow to be replaced with the kiln ash no more than 5% or the nonactive mixing material no more than 10%；
Adding nonactive mixing material must not exceed 10%.
According to above-described composite curing agent, preferably: gypsum is semi-hydrated gypsum, and purity is 99% or more.Industrially will
Gypsum is heated to 150 DEG C and is dehydrated into semi-hydrated gypsum.It is cement rate modifier that semi-hydrated gypsum, which is used as, to control its setting rate.
According to above-described composite curing agent, preferably: SAP super absorbent resin superfine powder is methyl methacrylate
Ester.Super absorbent resin is a kind of novel high molecular material, it can absorb the moisture of own wt hundred times to thousand times, nothing
It is malicious, harmless, pollution-free；Water absorbing capacity extra-heavy, water holding capacity is extra-high, is obtained by the heavy polymer that acroleic acid polymerization obtains
To high moisture-holding capacity, the balance of uptake under high load capacity, absorb water point cannot be squeezed out by simple physical method, and can release repeatedly
Water, water suction.Methyl methacrylate has the characteristics of low-temperature setting, rapid curing, superpower uvioresistant, has natural hardness
With the balance of toughness, wearability, weatherability, high-low temperature resistant be poor: the advantages that -20~+70 DEG C, many physical chemistry and usability
Significant particular advantages can be all had.
A kind of preparation method of composite curing agent, it is characterised in that, the following steps are included:
Step 1 adds cement, gypsum, anhydrous sodium sulphate in fluidization bed fly ash, is sealed and is stirred until homogeneous, mixed
Close object one；
Step 2 mixes SAP super absorbent resin superfine powder in mixture one, obtains mixture two；
Mixture two is continued to stir and be rolled, obtains the composite curing agent by step 3；
It is preferred that: the various substances of above-mentioned steps are added according to each material proportion.
According to the preparation method of above-described composite curing agent, preferably: in step 1, whipping temp is 12~18
℃。
According to the preparation method of above-described composite curing agent, preferably: in step 2, mixing SAP in mixture one
The speed of super absorbent resin superfine powder is 15~25kg/min.
According to the preparation method of above-described composite curing agent, preferably: in step 3, passing through blender and pulverizer
2 15~25min of mixture is stirred and rolled, the composite curing agent is obtained.
Claims (10)
1. a kind of composite curing agent, it is characterised in that, it include: fluidization bed fly ash, cement, gypsum, anhydrous sodium sulphate, SAP high water absorption
Property resin superfine powder, in which:
Fluidization bed fly ash accounts for the 20~30% of the mass percent of the composite curing agent；
Cement accounts for the 5~12% of the mass percent of the composite curing agent；
Gypsum accounts for the 5~12% of the mass percent of the composite curing agent；
Anhydrous sodium sulphate accounts for the 0.5~0.8% of the mass percent of the composite curing agent；
SAP super absorbent resin superfine powder accounts for the 0.05~0.1% of the mass percent of the composite curing agent.
2. composite curing agent according to claim 1, it is characterised in that:
Wherein, the fluidization bed fly ash is I grade of high-calcium type flyash.
3. composite curing agent according to claim 1, it is characterised in that:
Wherein, the specification of the anhydrous sodium sulphate is powdered, and purity is 98% or more.
4. composite curing agent according to claim 1, it is characterised in that:
Wherein, the cement is 4.25# ordinary portland cement.
5. composite curing agent according to claim 1, it is characterised in that:
Wherein, the gypsum is semi-hydrated gypsum, and purity is 99% or more.
6. composite curing agent according to claim 1, it is characterised in that:
Wherein, the SAP super absorbent resin superfine powder is methyl methacrylate.
7. a kind of preparation method of composite curing agent, it is characterised in that, the following steps are included:
Step 1 adds cement, gypsum, anhydrous sodium sulphate in fluidization bed fly ash, is sealed and is stirred until homogeneous, obtain mixture
One；
Step 2 mixes SAP super absorbent resin superfine powder in mixture one, obtains mixture two；
Mixture two is continued to stir and be rolled, obtains the composite curing agent by step 3；
Wherein the various substances of above-mentioned steps each material proportion described in accordance with the claim 1 is added.
8. the preparation method of composite curing agent according to claim 7, it is characterised in that:
Wherein, in step 1, whipping temp is 10~20 DEG C.
9. the preparation method of composite curing agent according to claim 7, it is characterised in that:
Wherein, in step 2, the speed that SAP super absorbent resin superfine powder is mixed in mixture one is 10~30kg/
min。
10. the preparation method of composite curing agent according to claim 7, it is characterised in that:
Wherein, it in step 3, is stirred by blender and pulverizer and rolls 2 10~30min of mixture, obtained described multiple
Close curing agent.
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| CN201711290548.4A CN109896809A (en) | 2017-12-08 | 2017-12-08 | Composite curing agent and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711290548.4A CN109896809A (en) | 2017-12-08 | 2017-12-08 | Composite curing agent and preparation method thereof |
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| CN109896809A true CN109896809A (en) | 2019-06-18 |
Family
ID=66939917
Family Applications (1)
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| CN201711290548.4A Pending CN109896809A (en) | 2017-12-08 | 2017-12-08 | Composite curing agent and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110845171A (en) * | 2019-11-19 | 2020-02-28 | 山西路桥建设集团有限公司 | Anti-freezing reinforcing agent for slag base layer material and preparation method thereof |
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|---|---|---|---|---|
| CN1736937A (en) * | 2005-07-14 | 2006-02-22 | 何国荣 | Soft soil hardener preparing from high calcium ash, desulfuration gypsum and cement |
| CN103121804A (en) * | 2013-03-13 | 2013-05-29 | 曾明慧 | Method for preparing clay curing agent |
| US20160326054A1 (en) * | 2015-04-29 | 2016-11-10 | Purdue Research Foundation | Cementitious mixtures, compositions for use in cementitious mixtures, and methods of producing cementitious mixtures |
| CN107021716A (en) * | 2017-05-12 | 2017-08-08 | 上海理工大学 | A kind of macromolecular mud curing agent and preparation method thereof |
-
2017
- 2017-12-08 CN CN201711290548.4A patent/CN109896809A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1736937A (en) * | 2005-07-14 | 2006-02-22 | 何国荣 | Soft soil hardener preparing from high calcium ash, desulfuration gypsum and cement |
| CN103121804A (en) * | 2013-03-13 | 2013-05-29 | 曾明慧 | Method for preparing clay curing agent |
| US20160326054A1 (en) * | 2015-04-29 | 2016-11-10 | Purdue Research Foundation | Cementitious mixtures, compositions for use in cementitious mixtures, and methods of producing cementitious mixtures |
| CN107021716A (en) * | 2017-05-12 | 2017-08-08 | 上海理工大学 | A kind of macromolecular mud curing agent and preparation method thereof |
Non-Patent Citations (2)
| Title |
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| 中国建筑科学研究院等编: "《混凝土实用手册》", 31 May 1987, 中国建筑工业出版社 * |
| 郭金敏等: "《注浆材料及其应用》", 30 September 2008, 中国矿业大学出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110845171A (en) * | 2019-11-19 | 2020-02-28 | 山西路桥建设集团有限公司 | Anti-freezing reinforcing agent for slag base layer material and preparation method thereof |
| CN110845171B (en) * | 2019-11-19 | 2022-01-04 | 山西路桥建设集团有限公司 | Anti-freezing reinforcing agent for slag base layer material and preparation method thereof |
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