CN106866052B - A kind of red mud-slag geopolymer and preparation method thereof - Google Patents
A kind of red mud-slag geopolymer and preparation method thereof Download PDFInfo
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- 239000002893 slag Substances 0.000 title claims abstract description 44
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 229920000876 geopolymer Polymers 0.000 title claims 6
- 239000012190 activator Substances 0.000 claims abstract description 29
- 150000001875 compounds Chemical class 0.000 claims abstract description 26
- 239000007787 solid Substances 0.000 claims abstract description 21
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 55
- 239000002131 composite material Substances 0.000 claims description 30
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 24
- 238000012360 testing method Methods 0.000 claims description 16
- 239000000843 powder Substances 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 13
- 239000000377 silicon dioxide Substances 0.000 claims description 12
- 235000019353 potassium silicate Nutrition 0.000 claims description 10
- 239000003513 alkali Substances 0.000 claims description 9
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 8
- 229910001948 sodium oxide Inorganic materials 0.000 claims description 7
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 6
- 239000000292 calcium oxide Substances 0.000 claims description 6
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 6
- PVGBHEUCHKGFQP-UHFFFAOYSA-N sodium;n-[5-amino-2-(4-aminophenyl)sulfonylphenyl]sulfonylacetamide Chemical compound [Na+].CC(=O)NS(=O)(=O)C1=CC(N)=CC=C1S(=O)(=O)C1=CC=C(N)C=C1 PVGBHEUCHKGFQP-UHFFFAOYSA-N 0.000 claims description 4
- 238000000227 grinding Methods 0.000 claims description 3
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 claims description 3
- 235000012239 silicon dioxide Nutrition 0.000 claims 2
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 229920000642 polymer Polymers 0.000 abstract description 24
- 239000002994 raw material Substances 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 10
- 230000008569 process Effects 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000010924 continuous production Methods 0.000 abstract description 2
- 239000008187 granular material Substances 0.000 description 19
- 230000006835 compression Effects 0.000 description 18
- 238000007906 compression Methods 0.000 description 18
- 235000011121 sodium hydroxide Nutrition 0.000 description 17
- 238000012423 maintenance Methods 0.000 description 16
- 239000000243 solution Substances 0.000 description 10
- 239000002002 slurry Substances 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- 239000004568 cement Substances 0.000 description 5
- 238000009837 dry grinding Methods 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000003595 mist Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000003818 cinder Substances 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910014472 Ca—O Inorganic materials 0.000 description 1
- 208000035126 Facies Diseases 0.000 description 1
- 229910007156 Si(OH)4 Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000010430 carbonatite Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000008202 granule composition Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 239000011396 hydraulic cement Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- -1 moisture content≤3% Substances 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Chemical compound O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000003334 potential effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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
- C04B28/006—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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a kind of red mud-slag geo-polymer and preparation method thereof, the red mud-slag geo-polymer is to excite using red mud and slag as primary raw material through compound alkali-activator.Many advantages, such as invention realizes the efficient utilization to red mud, two kinds of industrial solid castoffs of slag especially red mud, and the invention, with that can carry out continuous production, technical process is simple, at low cost, without secondary pollution, resulting product function admirable.
Description
Technical field
The present invention relates to geo-polymer fields, and in particular to a kind of red mud-slag geo-polymer and preparation method thereof.
Background technique
Red mud is a kind of strong basicity solid waste incidentally generated in aluminium oxide smelting process, at present whole world red mud pilling
Amount is close to 3,000,000,000 tons, and its comprehensive utilization ratio is only 15% or so.China due to the factors such as development technique level limitation, it is right
The comprehensive utilization ratio of red mud is also far away from this.Most red mud can only utilize the stockyard air storage of large area, air-dried
The fugitive dust that red mud generates is one of the arch-criminal for causing local haze weather instantly, while the strong basicity component in red mud is also right
Ground water regime, soil and surface vegetation etc. cause serious pollution and destroy.
Containing a large amount of sial components with potential activity in red mud, this has red mud to prepare the latent of geo-polymer
Matter, while using red mud as raw material preparing geo-polymer the alkali in red mud can be made to be converted into and preparing the advantageous object of geo-polymer
Matter.Although preparing existing research on geo-polymer to red mud at present, there is also defects, such as latest domestic research to report
In refer to and prepare geo-polymer using red mud as raw material, means are first to calcine to red mud, are then swashed again by alkali
Hair realizes the after polymerization of red mud, however calcination process makes the production cost greatly improved and is restricted its popularization and application；
There are also be exactly is used when preparing geo-polymer using red mud as a small amount of spike, such as have study with high-performance metakaolin,
Flyash etc. is used as matrix, and by the control of red mud volume within 20%, this utilizes the consumption of red mud and is extremely limited.
Summary of the invention
Object of the present invention is under the premise of utilizing red mud to greatest extent, provide one kind using red mud and slag as primary raw material
The manufactured geo-polymer with ideal compression strength (7d compression strength > 20MPa, 28d compression strength > 38MPa).
It is a further object of the present invention to provide a kind of red mud-slag geo-polymer preparation method, this method operative employees
Skill is simple, low in cost, it can be achieved that the efficient consumption to red mud utilizes.
In order to achieve the above object, the invention adopts the following technical scheme:
A kind of red mud-slag geo-polymer, the composite granule being made of red mud and slag is through compound alkali-activator
It excites, the mass ratio of composite granule and compound alkali-activator is 1:0.6-0.85；The wherein mass percent of composite granule
Composition are as follows: red mud 50%-70% and slag 30%-50%, compound alkali-activator are deployed by waterglass, sodium hydroxide and water and are obtained,
Modulus is 1.0-2.0, solid content 18%-42%.
Further preferably, the modulus of compound alkali-activator is 1.2-1.6, solid content 30%-38%.
The quality requirement of the red mud are as follows: moisture content≤3%, calcium oxide content≤15%, dioxide-containing silica≤20%, oxygen
Change aluminium content≤25%, fineness is that 75um is tailed over less than 15% after grinding.
The slag is blast-furnace cinder micro-powder, quality requirement are as follows: calcium oxide content≤45%, dioxide-containing silica≤
35%, alumina content≤12%, Blain specific surface 400-450m2/Kg。
The quality requirement of the waterglass are as follows: Baume degrees (° B é) is 50.4, and sodium oxide content >=12.8%, silica contains
Amount >=29.2%.
Red mud-slag geo-polymer preparation method, comprising the following steps:
1) composite granule is prepared: red mud, slag are chosen, red mud and slag are then mixed to get composite granule in proportion,
It is aged spare；
2) compound alkali-activator is prepared: the modulus using sodium hydroxide solution adjustment waterglass is 1.0-2.0, solid content is
18%-42%, it is spare；
When adjusting the modulus and solid content of waterglass, first according to the initial modulus, solid content and target mould of purchased waterglass
Number, solid content calculate the amount of required sodium hydroxide and water, then that sodium hydroxide is soluble in water, to sodium hydroxide solution cooling
It is added in purchased waterglass afterwards and compound alkali-activator is made；
3) according to cement paste preparation process, composite granule is mixed with compound alkali-activator by the mass ratio of 1:0.6-0.85
Conjunction stirs evenly, and injects the mold of 40mm*40mm*40mm；
4) by demoulding after step 3) resulting product overlay film natural curing for 24 hours, gained test block sprinkling maintenance under field conditions (factors)
Red mud-slag geo-polymer is obtained to certain age.
The present invention has the following advantages that and feature:
1, the present invention be using two kinds of industrial solid castoffs of red mud and slag as the raw material for preparing geo-polymer, it is used
Raw material is cheap and easy to get, and preparation process is simple, it can be achieved that continuous production, with good economic efficiency.
2, the present invention is the volume 50%-70% using red mud as primary raw material, has broken previous red mud low-dosage and has utilized
Limitation, realize the consumption to red mud large dosage utilization, for solve bring environmental pollution, land seizure due to red mud piling up
The problems such as provide effective way, have great social benefit.
3, the present invention is used to the alkali in red mud in the allocation process of compound alkali-activator, has prepared mechanical property
Good red mud-slag the geo-polymer of energy, has better durability than traditional cement-based gelling material.
4, when present invention preparation in alkaline environment, the Ca-O in slag micropowder is broken the Ca released2+In liquid phase
Si(OH)4Monomer and Al (OH)4 -Monomer reaction, so that containing a large amount of zeagonite in prepared geo-polymer mineral facies
Phase, zeagonite has the title of molecular sieve, and the phase macrostructure is rendered as loose porous tridimensional network.Therefore madely
If matter polymer is used for heavy metals immobilization field, " treatment of wastes with processes of wastes against one another " can be really realized, both utilize and refer to for the large dosage consumption of red mud
Outlet is illustrated, also provides simple and easy and low-cost method to heavy metals immobilization, realizes " double in environmental improvement
It wins ".
Specific embodiment
For a better understanding of the present invention, the content of present invention is described further below with reference to embodiment, but this hair
Bright content is not limited solely to the following examples, and embodiment is not construed as limitation of the invention.
Embodiment 1:
1) raw material is chosen: a. chooses Henan Great Wall Chinalco red mud dump bulk red mud, and grinding is dried to it
Processing, obtains red mud powder, moisture content≤3%, calcium oxide content≤15%, dioxide-containing silica≤20%, and alumina content≤
25%, fineness is that 75um is tailed over less than 15%；
B. slag be commercially available blast-furnace cinder, calcium oxide content≤45%, dioxide-containing silica≤35%, alumina content≤
12%, Blain specific surface 430m2/Kg；
2) prepared by composite granule: red mud powder and slag micropowder after taking dry grinding by quality, red mud powder and slag
Micro mist mass percent is respectively 50% and 50%, obtains composite granule for the two is dry-mixed, is aged spare for 24 hours；
3) compound alkali-activator is prepared: the dosage of sodium hydroxide and water needed for being calculated according to target modulus, solid content, by institute
It needs sodium hydrate particle to be slowly added in water and constantly stir to get sodium hydroxide solution, sodium hydroxide solution is cooled to room temperature
The water of reduction due to water evaporation is supplemented afterwards；By sodium hydroxide solution and liquid soluble glass (quality requirement are as follows: Baume degrees (° B é)
It is 50.4, sodium oxide content >=12.8%, dioxide-containing silica >=29.2%) uniformly mixing, obtained modulus is 1.6 and solid content is
30% compound alkali-activator, it is spare；
4) it forms and conserves: according to cement paste preparation process, by composite granule and compound alkali-activator by 1:0.85's
Mass ratio addition blender, which is sufficiently mixed, stirs to get slurry, by the mold of slurry injection 40mm*40mm*40mm, overlay film maintenance
Demoulding for 24 hours；By test block under field conditions (factors) sprinkling maintenance to certain age up to red mud-slag geo-polymer.
Gained test block maintenance to 7d and 28d compression strength (according to Test method for strength of hydraulic cement mortar (ISO method), similarly hereinafter)
Respectively 39.64MPa and 65.06MPa.
Embodiment 2:
1) raw material is chosen: step 1) in the same embodiment 1；
2) prepared by composite granule: red mud powder and slag micropowder after taking dry grinding by quality, red mud powder and slag
Micro mist mass percent is respectively 60% and 40%, obtains composite granule for the two is dry-mixed, is aged spare for 24 hours；
3) compound alkali-activator is prepared: the dosage of sodium hydroxide and water needed for being calculated according to target modulus, solid content, by institute
It needs sodium hydrate particle to be slowly added in water and constantly stir to get sodium hydroxide solution, sodium hydroxide solution is cooled to room temperature
The water of reduction due to water evaporation is supplemented afterwards；By sodium hydroxide solution and liquid soluble glass (quality requirement are as follows: Baume degrees (° B é)
It is 50.4, sodium oxide content >=12.8%, dioxide-containing silica >=29.2%) uniformly mixing, obtained modulus is 1.4 and solid content is
30% compound alkali-activator, it is spare；
4) it forms and conserves: according to cement paste preparation process, by composite granule and compound alkali-activator by 1:0.75's
Mass ratio addition blender, which is sufficiently mixed, stirs to get slurry, by the mold of slurry injection 40mm*40mm*40mm, overlay film maintenance
Demoulding for 24 hours；By test block under field conditions (factors) sprinkling maintenance to certain age up to red mud-slag geo-polymer.
The compression strength of gained test block maintenance to 7d and 28d distinguish 28.16MPa and 52.24MPa.
Embodiment 3:
1) raw material is chosen: step 1) in the same embodiment 1；
2) prepared by composite granule: step 2 in the same embodiment 2；
3) compound alkali-activator is prepared: the dosage of sodium hydroxide and water needed for being calculated according to target modulus, solid content, by hydrogen
Sodium oxide molybdena particle is slowly added in a certain amount of aqueous solution and is stirred continuously, and supplement is due to water evaporation after solution is cooled to room temperature
The water of reduction；By sodium hydroxide solution and liquid soluble glass (quality requirement are as follows: Baume degrees (° B é) is 50.4, sodium oxide content
>=12.8%, dioxide-containing silica >=29.2%) uniformly mixing, the compound alkali-activated carbonatite that obtained modulus is 1.6 and solid content is 34%
Agent, it is spare；
4) it forms and conserves: step 4) in the same embodiment 2；
The compression strength of gained test block maintenance to 7d and 28d are respectively 30.75MPa and 53.85MPa.
Embodiment 4:
1) raw material is chosen: step 1) in the same embodiment 1；
2) prepared by composite granule: red mud powder and slag micropowder after taking dry grinding by quality, red mud powder and slag
Micro mist mass percent is respectively 70% and 30%, obtains composite granule for the two is dry-mixed, is aged spare for 24 hours；
3) compound alkali-activator is prepared: step 3) in the same embodiment 1；
4) it forms and conserves: according to cement paste preparation process, by composite granule and compound alkali-activator by 1:0.65's
Mass ratio addition blender, which is sufficiently mixed, stirs to get slurry, by the mold of slurry injection 40mm*40mm*40mm, overlay film maintenance
Demoulding for 24 hours；By test block under field conditions (factors) sprinkling maintenance to certain age up to red mud-slag geo-polymer.
The compression strength of gained test block maintenance to 7d and 28d are respectively 23.52MPa and 38.20MPa.
Embodiment 5:
The difference is that, the modulus of compound alkali-activator is 1.2 and solid content is 34% with embodiment 4；
The compression strength of gained test block maintenance to 7d and 28d are respectively 27.19MPa and 44.20MPa.
The test block pressure resistance intensity of embodiment 1-5 meets 7d compression strength > 20MPa, 28d compression strength > 38MPa requirement.
Red mud of the present invention-slag geo-polymer, the mass percentage of red mud, slag, compound in composite granule
At its, respectively bound and section value can realize the present invention to modulus, the solid content of alkali-activator, just be not listed one by one herein
Embodiment.
Case of comparative examples 1:
Difference from example 1 is that: the mass ratio of composite granule and compound alkali-activator is 1:0.5.It starches at this time
Body, can not moulding by casting in experimentation because consistency causes greatly mobility too poor very much.
Case of comparative examples 2:
Difference from example 1 is that: the modulus of compound alkali-activator is 0.8, solid content, solid content 22%.
The compression strength of gained test block maintenance to 7d and 28d are respectively 22.77MPa and 18.10MPa.
Case of comparative examples 3:
Difference from example 1 is that: red mud powder and slag micropowder mass percent point when prepared by composite granule
It Wei 80% and 20%.
The compression strength of gained test block maintenance to 7d and 28d are respectively 12.33MPa and 22.97MPa.
Case of comparative examples 4:
With embodiment 5 the difference is that: the mass ratio of composite granule and compound alkali-activator be 1:1.
The compression strength of gained test block maintenance to 7d and 28d are respectively 10.56MPa and 17.94MPa and slurry setting time
Too long (> for 24 hours).
Case of comparative examples 5:
With embodiment 5 the difference is that: the modulus of compound alkali-activator be 2.2, solid content 42%.
The compression strength of gained test block maintenance to 7d and 28d are respectively 17.91MPa and 30.64MPa.
Found out by case of comparative examples 1-5, when some technical parameters change, 7d the or 28d compression strength of gained test block
It is difficult to meet ideal compression strength (7d compression strength > 20MPa, 28d compression strength > 38MPa) demand of product.
Claims (4)
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| CN2017100664877 | 2017-02-07 |
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| CN110862243A (en) * | 2019-11-19 | 2020-03-06 | 太原理工大学 | A low-cost and high-strength red mud-coal measure metakaolin polymer |
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| CN110818305B (en) * | 2019-11-19 | 2020-09-15 | 太原理工大学 | Method for adjusting geopolymer strength and realizing high-strength geopolymer |
| CN110759656B (en) * | 2019-11-19 | 2020-08-18 | 太原理工大学 | Normal-temperature single red mud geopolymer and preparation method thereof |
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