CN108439831A - A kind of exciting agent and red-mud coal ash cementitious material - Google Patents
A kind of exciting agent and red-mud coal ash cementitious material Download PDFInfo
- Publication number
- CN108439831A CN108439831A CN201810089319.4A CN201810089319A CN108439831A CN 108439831 A CN108439831 A CN 108439831A CN 201810089319 A CN201810089319 A CN 201810089319A CN 108439831 A CN108439831 A CN 108439831A
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- China
- Prior art keywords
- exciting agent
- red
- coal ash
- cementitious material
- mud
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Classifications
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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
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/243—Mixtures thereof with activators or composition-correcting additives, e.g. mixtures of fly ash and alkali activators
-
- 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
- C04B12/00—Cements not provided for in groups C04B7/00 - C04B11/00
- C04B12/005—Geopolymer cements, e.g. reaction products of aluminosilicates with alkali metal hydroxides or silicates
-
- 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
Abstract
The present invention relates to a kind of exciting agent and red-mud coal ash cementitious materials.The exciting agent presses following mass percentage composition by polymerization activity aluminium, sodium hydroxide, sodium metasilicate and cement：Polymerization activity aluminium is 30%~35%, and sodium hydroxide is 10%~20%, and sodium metasilicate is 10~20%, and cement is 35~40%.With in 0.5~1.5% incorporation red-mud coal ash cementitious material, 7d intensity can be improved 15~35%, 28d intensity and can be improved 30%~50% after this exciting agent is mixed by weight percentage.The present invention can effectively excite the activity of red-mud coal ash cementitious material, improve its intensity, achieve the purpose that largely to consume the trade wastes such as red mud and flyash, Social benefit and economic benefit is notable.
Description
Technical field
The present invention relates to industrial solid castoff processing technology field, specifically a kind of exciting agent and red-mud coal ash
Cementitious material.
Background technology
Red mud is aluminium industry after refining aluminium oxide in bauxite, and a kind of remaining red powder pureed strong basicity solid is useless
Material.Its main component is SiO2、CaO、Fe2O3、Al2O3、Na2O、TiO2、K2The oxides such as O, additionally ingredient containing igloss and micro
Non-ferrous metal.Red mud is divided into Bayer process red mud, red mud from sintering process or combination method red mud because of the difference of production technology.Average is every
1 ton of aluminium oxide is produced, 1.0~2.0 tons of red muds are incidentally generated.It " in order to improve red mud comprehensive utilization ratio and technical merit, reduces red
Mud stockpiling influence caused by environment, safety ", National Industrial in 2010 is just combined with informationization portion, the Department of Science and Technology to be printed and distributed《Red mud
Comprehensively utilize instruction》(Ministry of Industry and Information's interlink【2010】No. 401), it clearly proposes " exploitation red mud should be encouraged to prepare in the notification
The key technologies such as roadbed cementing material, ecological restoration material, and actively carry out commercial application ".The processing of waste red mud residues and comprehensive
It is a global hang-up that conjunction, which utilizes,.China at present can only use stockpiling disposition, fill depression, be discharged into it is marine by the way of
Reason.Based on wherein in a manner of stockpiling disposition, filling depression.
China belongs to energy big country, wherein again based on coal production capacity.The fine ash that catching is got off in flue gas after coal combustion claims
For flyash.Its main oxides group becomes：SiO2、Al2O3、FeO、Fe2O3、CaO、TiO2Deng.With the development of power industry,
The discharge capacity of flyash increases year by year, and a large amount of flyash is untreated, just will produce airborne dust, pollutes air；If being discharged into water system
River can be caused to silt up, and toxic chemical substance therein can also cause damages to human body and biology.It lives since flyash has
Property, a kind of mineral admixture can be used as to be added in concrete, saved a large amount of cement and fine aggregate, the heat of hydration is reduced and improve
Concrete impervious ability.
Although the highly basic that red mud contains can excite flyash to generate intensity, and be applied to pavement material, unburned
Brick, the fields such as filling in mine.But it is usually 1~2MPa since intensity is relatively low.Therefore, the intensity of red mud cementitious material how is improved
It is that those skilled in the art are badly in need of the technical barrier solved.
Invention content
The technical problem to be solved in the present invention is to provide a kind of exciting agent that can improve red mud intensity and red mud fine coal
Grey cementitious material.
The present invention is technical solution used by solving its technical problem：
A kind of exciting agent, the exciting agent press following masses percentage by polymerization activity aluminium, sodium hydroxide, sodium metasilicate and cement
Than composition：Polymerization activity aluminium is 30%~35%, and sodium hydroxide is 10%~20%, and sodium metasilicate is 10~20%, cement 35
~40%.
In said program, the unit weight of the exciting agent is：1050kg/m3~1140kg/m3。
In said program, the polymerization activity aluminium is aluminium polychloride, polyaluminium sulfate or polymer aluminium silicate.
In said program, purity >=98-99% of the sodium hydroxide, impurity Na2CO3≤ 0.5-1%, NaCl≤0.03-
0.08%, Fe2O3≤ 0.005-0.01%.
In said program, the sodium metasilicate modulus n is between 2.0~3.0.
In said program, the cement is portland cement.
A kind of red-mud coal ash cementitious material, the red-mud coal ash cementitious material include that outer volume is its mass percent
0.5%~1.5% exciting agent, the exciting agent are above-mentioned exciting agent.
In said program, the red-mud coal ash cementitious material includes red mud, flyash, desulfurated plaster and lime.
In said program, the red mud, flyash, desulfurated plaster and lime mass ratio be 10:8:1:1.
The present invention enhances red mud fine coal with polymerization activity aluminium, sodium hydroxide, primary raw material of the sodium metasilicate as exciting agent
The mechanism of grey cementitious material is：
Polymerization activity aluminium is widely used inorganic polymer flocculant in water process, and aluminium can network and moisture in aqueous solution
Son or hydroxyl form hydration hydroxyl aluminium ion.It had both had the characteristic of high charge, had containing a large amount of active groups, thus polymerize
Activated aluminum can reduce the average chain length and the degree of polymerization of C-A-S-H gel moleculars after being added so that C-A-S-H gel particles are distributed
More uniform refinement, shows stronger Van der Waals force.After thering is document to say that Al introduces gel molecular structure simultaneously, Ke Yizeng
Big laminate spacing, improves the porosity of gel pore so that the diffusion of ion is easier.Improve sa vitreum (powder
Coal ash, slag etc.) degree of hydration.
Sodium hydroxide is commonly called as caustic soda, caustic soda, caustic soda, and being one kind having corrosive highly basic.Its dissociation production soluble in water
Raw OH-Si-O-Si the and Al-O-Al keys in sa vitreum (flyash, slag etc.) can be made to be broken, form [SiO4]4-
[AlO4]5-Into liquid phase, the flocculence product of dispersion is formed.As flocculence product increases, polycondensation occurs between phase of flocculating
Reaction eventually forms gel or the crystal and undefined structure hydrated product of complexity, is filled with the hole of cementitious material and formation
Network structure wraps up particle wherein, to improve the intensity of cementitious material system.
Sodium metasilicate is commonly called as waterglass or sodium silicate.Its hydrolysis both provides OH-Ion promotion sa vitreum (flyash,
Slag etc.) depolymerization；[SiO is provided again4]4-[the SiO that Si-rich phase dissociates in ion, with vitreum4]4-Ion Ca together2+Deng from
Son generates gelling substance.
The invention has the advantages that：
1, the exciting agent for red-mud coal ash cementitious material, dosage account for the 0.5%~1.5% of cementitious material.
2, it is added in raw material by the way of mixing outside, it is simple for process, it is easy to operate.
3, the 7d intensity of cementitious material can be made to improve 15~25%, 28d intensity and improve 20%~30%.The present invention can be effective
The activity for exciting red-mud coal ash cementitious material, improves its intensity, has widened the application field of red mud.
Specific implementation mode
For a clearer understanding of the technical characteristics, objects and effects of the present invention, show comparative examples specifically
The specific implementation mode of the bright present invention.
Embodiment 1
The present embodiment provides a kind of exciting agent, the exciting agent includes polymerization activity aluminium：15g, sodium hydroxide：7.5g, silicon
Sour sodium：7.5g, cement：20g.
In the present embodiment, polymerization activity aluminium is aluminium polychloride.
The present embodiment also provides a kind of red-mud coal ash cementitious material, and raw material is：Red mud 5kg, flyash 4kg, desulfurization stone
Cream 0.5kg, lime 0.5kg, exciting agent 50g, institute's water requirement are 2.75kg.
The preparation process of the red-mud coal ash cementitious material is as follows：
A, all solid raw materials are proportionally added blender and are uniformly mixed.
B, weigh the exciting agent of solid raw material total content 0.5% and the mode mixed in addition be added it is uniformly mixed.
C, Jiang Shui is proportionally added into uniformly mixed siccative, is then stirred.
Embodiment 2
The present embodiment provides a kind of exciting agent, the exciting agent includes polymerization activity aluminium：15g, sodium hydroxide：10g, silicic acid
Sodium：5g, cement：20g.
In the present embodiment, polymerization activity aluminium is polyaluminium sulfate.
The present embodiment also provides a kind of red-mud coal ash cementitious material, raw material：Red mud 5kg, flyash 4kg, desulfurated plaster
0.5kg, lime 0.5kg, exciting agent 50g, institute's water requirement are 2.78kg.
A, all solid raw materials are proportionally added blender and are uniformly mixed.
B, weigh the exciting agent of solid raw material total content 0.5% and the mode mixed in addition be added it is uniformly mixed.
C, Jiang Shui is proportionally added into uniformly mixed siccative, is then stirred.
Embodiment 3
The present embodiment provides a kind of exciting agent, the exciting agent includes polymerization activity aluminium：15g, sodium hydroxide：5g, silicic acid
Sodium：10g, cement：20g.
In the present embodiment, polymerization activity aluminium is aluminium polychloride.
The present embodiment also provides a kind of red-mud coal ash cementitious material, raw material：Red mud 5kg, flyash 4kg, desulfurated plaster
0.5kg, lime 0.5kg, exciting agent 50g, institute's water requirement are 2.74kg.
A, all solid raw materials are proportionally added blender and are uniformly mixed.
B, weigh the exciting agent of solid raw material total content 0.5% and the mode mixed in addition be added it is uniformly mixed.
C, Jiang Shui is proportionally added into uniformly mixed siccative, is then stirred.
Embodiment 4
The present embodiment provides a kind of exciting agent, the exciting agent includes polymerization activity aluminium：17.5g sodium hydroxide：7.5g
Sodium metasilicate：7.5g, cement：17.5g.
In the present embodiment, polymerization activity aluminium is polymer aluminium silicate.
The present embodiment also provides a kind of red-mud coal ash cementitious material, raw material：Red mud 5kg, flyash 4kg, desulfurated plaster
0.5kg, lime 0.5kg, exciting agent 50g, institute's water requirement are 2.83kg.
A, all solid raw materials are proportionally added blender and are uniformly mixed.
B, weigh the exciting agent of solid raw material total content 0.5% and the mode mixed in addition be added it is uniformly mixed.
C, Jiang Shui is proportionally added into uniformly mixed siccative, is then stirred.
Embodiment 5
The present embodiment provides a kind of exciting agent, the exciting agent includes polymerization activity aluminium：17.5g sodium hydroxide：10g, silicon
Sour sodium：5g, cement：17.5g.
In the present embodiment, polymerization activity aluminium is aluminium polychloride.
The present embodiment also provides a kind of red-mud coal ash cementitious material, raw material：Red mud 5kg, flyash 4kg, desulfurated plaster
0.5kg, lime 0.5kg, exciting agent 50g, institute's water requirement are 2.81kg.
A, all solid raw materials are proportionally added blender and are uniformly mixed.
B, weigh the exciting agent of solid raw material total content 0.5% and the mode mixed in addition be added it is uniformly mixed.
C, Jiang Shui is proportionally added into uniformly mixed siccative, is then stirred.
Embodiment 6
The present embodiment provides a kind of exciting agent, the exciting agent includes polymerization activity aluminium：17.5g sodium hydroxide：5g, silicon
Sour sodium：10g, cement：17.5g.
In the present embodiment, polymerization activity aluminium is polyaluminium sulfate.
The present embodiment also provides a kind of red-mud coal ash cementitious material, raw material：Red mud 5kg, flyash 4kg, desulfurated plaster
0.5kg, lime 0.5kg, exciting agent 50g, institute's water requirement are 2.83kg.
A, all solid raw materials are proportionally added blender and are uniformly mixed.
B, weigh the exciting agent of solid raw material total content 0.5% and the mode mixed in addition be added it is uniformly mixed.
C, Jiang Shui is proportionally added into uniformly mixed siccative, is then stirred.
Embodiment 7
The present embodiment provides a kind of exciting agent, the exciting agent includes polymerization activity aluminium：15g, sodium hydroxide：10g, silicic acid
Sodium：7.5g, cement：17.5g.
In the present embodiment, polymerization activity aluminium is aluminium polychloride.
The present embodiment also provides a kind of red-mud coal ash cementitious material, raw material：Red mud 5kg, flyash 4kg, desulfurated plaster
0.5kg, lime 0.5kg, exciting agent 50g, institute's water requirement are 2.76kg.
A, all solid raw materials are proportionally added blender and are uniformly mixed.
B, weigh the exciting agent of solid raw material total content 0.5% and the mode mixed in addition be added it is uniformly mixed.
C, Jiang Shui is proportionally added into uniformly mixed siccative, is then stirred.
Embodiment 8
The present embodiment provides a kind of exciting agent, the exciting agent includes polymerization activity aluminium：15g, sodium hydroxide：7.5g, silicon
Sour sodium：10g, cement：17.5g.
In the present embodiment, polymerization activity aluminium is polymer aluminium silicate.
The present embodiment also provides a kind of red-mud coal ash cementitious material, raw material：Red mud 5kg, flyash 4kg, desulfurated plaster
0.5kg, lime 0.5kg, exciting agent 50g, institute's water requirement are 2.74kg.
A, all solid raw materials are proportionally added blender and are uniformly mixed.
B, weigh the exciting agent of solid raw material total content 0.5% and the mode mixed in addition be added it is uniformly mixed.
C, Jiang Shui is proportionally added into uniformly mixed siccative, is then stirred.
7d the and 28d unconfined compressive strengths of above-described embodiment see the table below 1 with comparative sample test result.
Comparative sample is red mud 5kg, flyash 4kg, desulfurated plaster 0.5kg, lime 0.5kg.Institute's water requirement is 2.71kg.
The strength test results of 1 present invention of table:
The embodiment of the present invention is described above, but the invention is not limited in above-mentioned specific embodiment parties
Formula, the above mentioned embodiment is only schematical, rather than restrictive, and those skilled in the art are in this hair
Under bright enlightenment, without breaking away from the scope protected by the purposes and claims of the present invention, many forms can be also made, this
It is a little to belong within the protection of the present invention.
Claims (9)
1. a kind of exciting agent, which is characterized in that the exciting agent is pressed by polymerization activity aluminium, sodium hydroxide, sodium metasilicate and cement
Row mass percentage composition：Polymerization activity aluminium be 30%~35%, sodium hydroxide be 10%~20%, sodium metasilicate be 10~
20%, cement is 35~40%.
2. exciting agent according to claim 1, which is characterized in that the unit weight of the exciting agent is：1050kg/m3~
1140kg/m3。
3. exciting agent according to claim 1, which is characterized in that the polymerization activity aluminium is aluminium polychloride, polymerised sulphur
Sour aluminium or polymer aluminium silicate.
4. exciting agent according to claim 1, which is characterized in that purity >=98-99% of the sodium hydroxide, impurity
Na2CO3≤ 0.5-1%, NaCl≤0.03-0.08%, Fe2O3≤ 0.005-0.01%.
5. exciting agent according to claim 1, which is characterized in that the sodium metasilicate modulus n is between 2.0~3.0.
6. exciting agent according to claim 1, which is characterized in that the cement is portland cement.
7. a kind of red-mud coal ash cementitious material, which is characterized in that the red-mud coal ash cementitious material includes that outer volume accounts for it
The exciting agent of mass percent 0.5%~1.5%, the exciting agent are claim 1 to 6 any one of them exciting agent.
8. red-mud coal ash cementitious material according to claim 7, which is characterized in that the red-mud coal ash cementitious material
Including red mud, flyash, desulfurated plaster and lime.
9. red-mud coal ash cementitious material according to claim 8, which is characterized in that the red mud, flyash, desulfurization stone
The mass ratio of cream and lime is 10:8:1:1.
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| CN201810089319.4A CN108439831B (en) | 2018-01-30 | 2018-01-30 | Excitant and red mud fly ash cementing material |
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| CN201810089319.4A CN108439831B (en) | 2018-01-30 | 2018-01-30 | Excitant and red mud fly ash cementing material |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109020461A (en) * | 2018-09-03 | 2018-12-18 | 山西云泉岩土工程科技股份有限公司 | A kind of red mud sill for roadbed steady layer of water |
| CN109485286A (en) * | 2019-01-22 | 2019-03-19 | 山东淄创新材料科技有限公司 | Baking-free brick of red mud promotor and preparation method thereof |
| CN110372316A (en) * | 2019-09-02 | 2019-10-25 | 鞍钢矿业爆破有限公司 | A kind of well cuttings blast hole stemming liquid gelling agent |
| CN110467368A (en) * | 2019-09-11 | 2019-11-19 | 上海海顾新材料科技有限公司 | A kind of activity excitant and preparation method thereof for inorganic solid waste building materials |
| CN110759680A (en) * | 2019-11-14 | 2020-02-07 | 山东大学 | Red mud utilization method based on cooperative treatment of industrial tail gas, sewage treatment and green high-performance civil functional material |
| CN110776267A (en) * | 2019-11-06 | 2020-02-11 | 中冶南方都市环保工程技术股份有限公司 | Inorganic cementing material prepared from Bayer process red mud and preparation method thereof |
| CN111548039A (en) * | 2020-04-22 | 2020-08-18 | 深圳大学 | Red mud geopolymer aggregate and preparation method thereof |
| CN112028591A (en) * | 2020-08-20 | 2020-12-04 | 广东同创科鑫环保有限公司 | Construction method of vertical roadbed made of red mud-based cast-in-place lightweight soil |
| CN113149569A (en) * | 2021-05-11 | 2021-07-23 | 山东大学 | High-pressure jet grouting waterproof curtain support anti-seepage curing material and preparation method and application thereof |
| CN113860802A (en) * | 2021-07-20 | 2021-12-31 | 江苏东交智控科技集团股份有限公司 | Environment-friendly high-performance mineral admixture and preparation method and application thereof |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109020461A (en) * | 2018-09-03 | 2018-12-18 | 山西云泉岩土工程科技股份有限公司 | A kind of red mud sill for roadbed steady layer of water |
| CN109485286A (en) * | 2019-01-22 | 2019-03-19 | 山东淄创新材料科技有限公司 | Baking-free brick of red mud promotor and preparation method thereof |
| CN109485286B (en) * | 2019-01-22 | 2021-06-18 | 山东淄创新材料科技有限公司 | Accelerant for red mud baking-free brick and preparation method thereof |
| CN110372316A (en) * | 2019-09-02 | 2019-10-25 | 鞍钢矿业爆破有限公司 | A kind of well cuttings blast hole stemming liquid gelling agent |
| CN110467368A (en) * | 2019-09-11 | 2019-11-19 | 上海海顾新材料科技有限公司 | A kind of activity excitant and preparation method thereof for inorganic solid waste building materials |
| CN110776267A (en) * | 2019-11-06 | 2020-02-11 | 中冶南方都市环保工程技术股份有限公司 | Inorganic cementing material prepared from Bayer process red mud and preparation method thereof |
| CN110759680A (en) * | 2019-11-14 | 2020-02-07 | 山东大学 | Red mud utilization method based on cooperative treatment of industrial tail gas, sewage treatment and green high-performance civil functional material |
| WO2021093168A1 (en) * | 2019-11-14 | 2021-05-20 | 山东大学 | Method for applying red mud in industrial waste gases and wastewater treatment and green high performance functional materials co-processing |
| CN111548039A (en) * | 2020-04-22 | 2020-08-18 | 深圳大学 | Red mud geopolymer aggregate and preparation method thereof |
| CN112028591A (en) * | 2020-08-20 | 2020-12-04 | 广东同创科鑫环保有限公司 | Construction method of vertical roadbed made of red mud-based cast-in-place lightweight soil |
| CN113149569A (en) * | 2021-05-11 | 2021-07-23 | 山东大学 | High-pressure jet grouting waterproof curtain support anti-seepage curing material and preparation method and application thereof |
| CN113860802A (en) * | 2021-07-20 | 2021-12-31 | 江苏东交智控科技集团股份有限公司 | Environment-friendly high-performance mineral admixture and preparation method and application thereof |
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