CN110372267A - A method of strengthening fly ash-based geopolymer material property - Google Patents
A method of strengthening fly ash-based geopolymer material property Download PDFInfo
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- CN110372267A CN110372267A CN201910574186.4A CN201910574186A CN110372267A CN 110372267 A CN110372267 A CN 110372267A CN 201910574186 A CN201910574186 A CN 201910574186A CN 110372267 A CN110372267 A CN 110372267A
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- based geopolymer
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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
- C04B28/006—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 mineral polymers, e.g. geopolymers of the Davidovits type
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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
- 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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- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- Organic Chemistry (AREA)
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Abstract
The present invention relates to a kind of methods for strengthening fly ash-based geopolymer material property.Its technical solution is: the spent FCC catalyst of the flyash of 40~60wt%, the solid alkali-activator of 20~40wt% and 10~35wt% being mixed, stirs evenly, obtains fly ash-based geopolymer powder；By fly ash-based geopolymer powder: the mass ratio of water is 1: 0.25~0.4, adds water in fly ash-based geopolymer powder, stirs under the conditions of 70~90 DEG C, obtain fly ash-based geopolymer gel；Fly ash-based geopolymer gel is added in mold, the fly ash-based geopolymer gel being added in mold is vibrated into 1~3min with vibrating head again or the mold is placed in 3~5min of vibration on shake table, maintenance in curing box, demoulding, room temperature maintenance, obtains fly ash-based geopolymer material.Present invention process is simple, environmental-friendly and at low cost；Obtained fly ash-based geopolymer material compression strength is high, heat-resisting quantity is strong and long service life.
Description
Technical field
The invention belongs to geopolymer technical fields.More particularly to a kind of reinforcing fly ash-based geopolymer material property
Method.
Technical background
Geopolymer is considered as the novel environmental-friendly construction material that most probable replaces conventional cement, it has compared with cement
The preferably performance of resistance to chemical attack ability, excellent durability, good heat-resisting quantity and energy curing heavy metal ion, and
Carbon emission amount is low in preparation process, simple process and less energy consumption；The raw material for especially preparing geopolymer is extensive, can select tail
Prepared by the waste rich in sial element such as mine, solid waste is enable to get utilization, and has both alleviated environmental pollution load,
Economic benefit is also created simultaneously.Therefore, the weight that high-intensitive geopolymer is scientific and technical personnel's concern is prepared into using waste
One of point.
With the development of power industry, the flyash discharge capacity of coal-burning power plant increases year by year, and it is current that flyash becomes China
One of biggish industrial residue of discharge capacity.If a large amount of flyash is handled not in time, fugitive dust will be generated, pollutes atmosphere；And wherein
Toxic chemical substance can also cause damages to human body and biology.
Fluid cracking catalyst (Fluid Catalytic Cracking, FCC) technique (referred to as refines oil) row in petroleum refining
It is occupied an important position in industry, and FCC catalyst plays key player in the process.Since spent FCC catalyst is deposited with weight
Metallic element, spent FCC catalyst in 2016 have been put into " the National Hazard waste register " of new publication.The place of spent FCC catalyst
It manages and brings biggish economic pressures to oil refining enterprise, and fill and will also result in the certain wasting of resources and environmental pollution.Therefore will
Spent FCC catalyst resource utilization becomes a urgent problem to be solved.
Prepare in the method for geopolymer, using spent FCC catalyst prepare geopolymer (Erich D.Rodr í guez,
Susan A.Bernal.Geopolymers based on spent catalyst residue from a fluid
Catalytic cracking (FCC) process, Fuel 109 (2013) 493-502), but geopolymer complex process is prepared,
And just for the utilization of specific FCC catalyst, it is unfavorable for utilizing extensively.
Discovered in recent years flyash can prepare geopolymer by adding the means of alkali-activator.Sukmak etc.
(Sukmak, Patimapon, Horpibulsuk, Suksun, Shen, Shui-Long.Strength development in
Clay-fly ash geopolymer, Construction and Building Materials, Vol.40 (2013), 566-
574) geopolymer is obtained using coal ash for manufacturing, but prepared geopolymer compression strength is lower, structure is not closely knit enough.
A kind of " gel rubber material and preparation method for improving properties of fly ash-based inorganic polymer " (CA101823847) patent
Technology.The technology makes fly ash-based geopolymer by adding Styrene And Butyl-acrylate-acrylic acid ternary hybrid resin lotion
Toughness is increased.But styrene, butyl acrylate and acrylic acid higher cost, and the addition of organic matter can make to cause ring
Border pollution, and weaken the heat-resisting quantity of geopolymer.
(Kong Fanlong, Liu Ze, all good, et al. slag-fly ash base geological polymer performance and the microcosmic knot such as Kong Fanlong
Research [J] electron microscopic journal of structure, 2016,35 (3): 229-234.) it studies using slag powders and flyash coordinate system for base
Geopolymer, but due to the introducing of slag powders, the cement main component hydrated calcium silicate gel (C-S-H) of generation can be to flyash
The durability of based geopolymer has a negative impact.
In conclusion the prior art has complex process, pollution environment and geopolymer pressure resistance at high cost, obtained
Degree, the disadvantages of high temperature resistance and durability are poor.
Summary of the invention
The present invention is directed to overcome the deficiencies of existing technologies, and it is an object of the present invention to provide a kind of simple process, it is environmental-friendly and at
The method of this low reinforcing fly ash-based geopolymer material property；The fly ash-based geopolymer material obtained with the intensifying method
The compression strength of material is high, heat-resisting quantity is strong and long service life.
To achieve the above object, the technical solution adopted by the present invention is that:
Step 1: by the useless of the flyash of 40~60wt%, the solid alkali-activator of 20~40wt% and 10~35wt%
FCC catalyst mixing, stirs evenly, obtains fly ash-based geopolymer powder.
Step 2: pressing the fly ash-based geopolymer powder: the mass ratio of water is 1: 0.25~0.4, and the water is added
Enter the fly ash-based geopolymer powder, is then stirred evenly under the conditions of 70~90 DEG C, obtain fly ash-based geopolymer
Gel.
Step 3: the fly ash-based geopolymer gel is added in mold, then the fine coal in the mold will be added
Grey based geopolymer gel vibrates 1~3min with vibrating head or the mold is placed in 3~5min of vibration on shake table；Then exist
Maintenance 4~24 hours in curing box, demoulding continue maintenance 3~7 days under room temperature, obtain fly ash-based geopolymer material.
The spent FCC catalyst is petroleum fluid cracking catalyst decaying catalyst；In spent FCC catalyst: SiO2For 40~
55wt%, Al2O3For 40~55wt%；The partial size of spent FCC catalyst is less than 0.090mm.
The solid alkali-activator is the mixture of sodium metasilicate and sodium hydroxide；Wherein: sodium metasilicate is 10~30wt%, hydrogen
Sodium oxide molybdena is 70~90wt%.
In the flyash: SiO2For 40~70wt%, Al2O3For 20~50wt%；The partial size of flyash is less than
0.053mm。
The temperature of the curing box is 40~85 DEG C, and the relative humidity of curing box is greater than 90%.
Due to the adoption of the above technical scheme, the present invention have compared with prior art it is following the utility model has the advantages that
The present invention enables solid waste using spent FCC catalyst as the primary raw material of fly ash-based geopolymer material
It is fully utilized, turns waste into wealth.Slow down the offal treatment burden of oil refining enterprise and Mei electricity enterprise.With environmental-friendly
With advantage at low cost.
The present invention discharges the Al element in spent FCC catalyst sufficiently using the method for hydro-thermal stirring, accelerates simultaneously
The dissolution of activated silica, aluminium element in flyash, spot polymerization reaction generate a large amount of N-A-S-H gel, make flyash base
The performance of polymer material is strengthened, and obtained fly ash-based geopolymer material has compression strength height, heat-resisting quantity
The characteristics of good and long service life.
Spent FCC catalyst is introduced into fly ash-based geopolymer material system by the present invention, spent FCC catalyst surface-active
Silicon, aluminium element form gel phase, wrap up inertial base therein and form the micro-aggregate with gel surface, construct the skeleton that gathers materials.
Keep the structure of fly ash-based geopolymer material even closer, improves compression strength.
The present invention is mixed using solid alkali-activator with geopolymer raw material, has been carried out pre-activate effect to raw material, has been obtained
Fly ash-based geopolymer powder, it is subsequent without configuring alkali activating agent solution, it need to only add water and stir, conserve and demould in mold and support
Shield, can be obtained fly ash-based geopolymer material；Therefore simple process, production cost are low and easy to operate.
The flyash of spent FCC catalyst is not added under fly ash-based geopolymer material and the same terms that the present invention obtains
Based geopolymer is compared: close structure and heat-resisting quantity are good, and compression strength improves 50% or more.
Therefore, the present invention has the characteristics that simple process, environmental-friendly and at low cost；The fine coal obtained with the intensifying method
Grey based geopolymer material compression strength is high, heat-resisting quantity is strong and long service life.
Specific embodiment
The present invention is described further With reference to embodiment, not to the limitation of its protection scope:
To avoid repeating, first by material Unify legislation involved by present embodiment, repeated no more in embodiment:
The spent FCC catalyst is petroleum fluid cracking catalyst decaying catalyst；In spent FCC catalyst: SiO2For 40~
55wt%, Al2O3For 40~55wt%；The partial size of spent FCC catalyst is less than 0.090mm.
The solid alkali-activator is the mixture of sodium metasilicate and sodium hydroxide；Wherein: sodium metasilicate accounts for 10~30wt%, hydrogen
Sodium oxide molybdena accounts for 70~90wt%.
In the flyash: SiO2For 40~70wt%, Al2O3For 20~50wt%；The partial size of flyash is less than
0.053mm。
The temperature of the curing box is 40~85 DEG C, and the relative humidity of curing box is greater than 90%.
Embodiment 1
A method of strengthening fly ash-based geopolymer material property.The present embodiment the method is:
Step 1: by the useless of the flyash of 40~50wt%, the solid alkali-activator of 25~35wt% and 25~35wt%
FCC catalyst mixing, stirs evenly, obtains fly ash-based geopolymer powder.
Step 2: pressing the fly ash-based geopolymer powder: the mass ratio of water is 1: 0.25~0.30, and the water is added
Enter the fly ash-based geopolymer powder, is then stirred evenly under the conditions of 70~80 DEG C, obtain fly ash-based geopolymer
Gel.
Step 3: the fly ash-based geopolymer gel is added in mold, then the fine coal in the mold will be added
Grey based geopolymer gel vibrates 1~3min with vibrating head or the mold is placed in 3~5min of vibration on shake table；Then exist
Maintenance 4~10 hours in curing box, demoulding continue maintenance 3~5 days under room temperature, obtain fly ash-based geopolymer material.
Embodiment 2
A method of strengthening fly ash-based geopolymer material property.The present embodiment the method is:
Step 1: by the useless of the flyash of 45~55wt%, the solid alkali-activator of 20~30wt% and 20~30wt%
FCC catalyst mixing, stirs evenly, obtains fly ash-based geopolymer powder.
Step 2: pressing the fly ash-based geopolymer powder: the mass ratio of water is 1: 0.30~0.35, and the water is added
Enter the fly ash-based geopolymer powder, is then stirred evenly under the conditions of 75~85 DEG C, obtain fly ash-based geopolymer
Gel.
Step 3: the fly ash-based geopolymer gel is added in mold, then the fine coal in the mold will be added
Grey based geopolymer gel vibrates 1~3min with vibrating head or the mold is placed in 3~5min of vibration on shake table；Then exist
Maintenance 10~18 hours in curing box, demoulding continue maintenance 4~6 days under room temperature, obtain fly ash-based geopolymer material
Material.
Embodiment 3
A method of strengthening fly ash-based geopolymer material property.The present embodiment the method is:
Step 1: by the useless of the flyash of 50~60wt%, the solid alkali-activator of 30~40wt% and 10~20wt%
FCC catalyst mixing, stirs evenly, obtains fly ash-based geopolymer powder.
Step 2: pressing the fly ash-based geopolymer powder: the mass ratio of water is 1: 0.35~0.4, and the water is added
Enter the fly ash-based geopolymer powder, is then stirred evenly under the conditions of 80~90 DEG C, obtain fly ash-based geopolymer
Gel.
Step 3: the fly ash-based geopolymer gel is added in mold, then the fine coal in the mold will be added
Grey based geopolymer gel vibrates 1~3min with vibrating head or the mold is placed in 3~5min of vibration on shake table；Then exist
Maintenance 18~24 hours in curing box, demoulding continue maintenance 5~7 days under room temperature, obtain fly ash-based geopolymer material
Material.
Present embodiment have compared with prior art it is following the utility model has the advantages that
Present embodiment makes solid using spent FCC catalyst as the primary raw material of fly ash-based geopolymer material
Waste can be fully utilized, and turn waste into wealth.Slow down the offal treatment burden of oil refining enterprise and Mei electricity enterprise.Have
Environmental-friendly and at low cost advantage.
Present embodiment discharges the Al element in spent FCC catalyst sufficiently using the method for hydro-thermal stirring,
Accelerate the dissolution of activated silica in flyash, aluminium element simultaneously, spot polymerization reaction generates a large amount of N-A-S-H gel, makes powder
The performance of coal ash based geopolymer material is strengthened, obtained fly ash-based geopolymer material have compression strength it is high,
The characteristics of heat-resisting quantity is good and long service life.
Spent FCC catalyst is introduced into fly ash-based geopolymer material system by present embodiment, spent FCC catalyst
Surface-active silicon, aluminium element form gel phase, wrap up inertial base therein and form the micro-aggregate with gel surface, building collection
Expect skeleton.Keep the structure of fly ash-based geopolymer material even closer, improves compression strength.
Present embodiment is mixed using solid alkali-activator with geopolymer raw material, has carried out pre-activate work to raw material
With, fly ash-based geopolymer powder is obtained, it is subsequent without configuring alkali activating agent solution, only it need to add water and stir, be conserved in mold
It is conserved with demoulding, fly ash-based geopolymer material can be obtained；Therefore simple process, production cost are low and easy to operate.
Spent FCC catalyst is not added under fly ash-based geopolymer material and the same terms that present embodiment obtains
Fly ash-based geopolymer compare: close structure and heat-resisting quantity are good, compression strength improve 50% or more.
Therefore, present embodiment has the characteristics that simple process, environmental-friendly and at low cost；It is obtained with the intensifying method
The fly ash-based geopolymer material compression strength arrived is high, heat-resisting quantity is strong and long service life.
Claims (5)
1. a kind of method for strengthening fly ash-based geopolymer material property, it is characterised in that the method is:
Step 1: the useless FCC of the flyash of 40~60wt%, the solid alkali-activator of 20~40wt% and 10~35wt% is urged
Agent mixing, stirs evenly, obtains fly ash-based geopolymer powder；
Step 2: pressing the fly ash-based geopolymer powder: the mass ratio of water is 1: 0.25~0.4, and institute is added in the water
Fly ash-based geopolymer powder is stated, is then stirred evenly under the conditions of 70~90 DEG C, obtains fly ash-based geopolymer gel；
Step 3: the fly ash-based geopolymer gel is added in mold, then the fly ash base in the mold will be added
Geopolymer gel vibrates 1~3min with vibrating head or the mold is placed in 3~5min of vibration on shake table；Then it is conserving
Maintenance 4~24 hours in case, demoulding continue maintenance 3~7 days under room temperature, obtain fly ash-based geopolymer material.
2. the method according to claim 1 for strengthening fly ash-based geopolymer material property, it is characterised in that described useless
FCC catalyst is petroleum fluid cracking catalyst decaying catalyst；In spent FCC catalyst: SiO2For 40~55wt%, Al2O3It is 40
~55wt%；The partial size of spent FCC catalyst is less than 0.090mm.
3. the method according to claim 1 for strengthening fly ash-based geopolymer material property, it is characterised in that described solid
Body alkali-activator is the mixture of sodium metasilicate and sodium hydroxide；Wherein: sodium metasilicate be 10~30wt%, sodium hydroxide be 70~
90wt%.
4. the method according to claim 1 for strengthening fly ash-based geopolymer material property, it is characterised in that the powder
In coal ash: SiO2For 40~70wt%, Al2O3For 20~50wt%；The partial size of flyash is less than 0.053mm.
5. the method according to claim 1 for strengthening fly ash-based geopolymer material property, it is characterised in that described to support
The temperature of protecting box is 40~85 DEG C, and the relative humidity of curing box is greater than 90%.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111995354A (en) * | 2020-08-31 | 2020-11-27 | 武汉大学 | Reinforced fly ash-based polymer and preparation method thereof |
| CN115716722B (en) * | 2022-11-30 | 2023-10-20 | 北京科技大学 | Preparation method of fly ash-based geopolymer with adjustable mechanical properties |
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| CN103449744A (en) * | 2013-08-26 | 2013-12-18 | 温州大学 | Fly ash based geopolymer and preparation method thereof |
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| CN103449744A (en) * | 2013-08-26 | 2013-12-18 | 温州大学 | Fly ash based geopolymer and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111995354A (en) * | 2020-08-31 | 2020-11-27 | 武汉大学 | Reinforced fly ash-based polymer and preparation method thereof |
| CN111995354B (en) * | 2020-08-31 | 2021-10-22 | 武汉大学 | Reinforced fly ash-based polymer and preparation method thereof |
| CN115716722B (en) * | 2022-11-30 | 2023-10-20 | 北京科技大学 | Preparation method of fly ash-based geopolymer with adjustable mechanical properties |
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Application publication date: 20191025 |