CN105601135B - A method of using red mud and coal ash for manufacturing for geology polymer material - Google Patents
A method of using red mud and coal ash for manufacturing for geology polymer material Download PDFInfo
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- CN105601135B CN105601135B CN201610017921.8A CN201610017921A CN105601135B CN 105601135 B CN105601135 B CN 105601135B CN 201610017921 A CN201610017921 A CN 201610017921A CN 105601135 B CN105601135 B CN 105601135B
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- red mud
- flyash
- sodium hydroxide
- hydroxide solution
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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
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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
- 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
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- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Treatment Of Sludge (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a kind of using red mud and coal ash for manufacturing for the method for geology polymer material.Use red mud, flyash for main base starting material, using sodium hydroxide solution as alkali-activator, prepare red-mud coal ash geo-polymer cementitious material, it carries out red mud and flyash to be mixed to form geo-polymer by different mass percents, it is separately added into the NaOH solution of various concentration, it is aoxidized under the fog room curing condition different with laboratory, obtains the geology polymer material of different intensity grades.Method of the invention is simple, and prepared geology polymer material can be widely applied to construction material manufacture, roadbed filling, the various fields such as material of body of a pile, it solves pollution problem of the red mud to environment, turns waste into wealth, there is positive impetus to the comprehensive utilization of red mud and flyash.
Description
Technical field
The present invention relates to a kind of methods for preparing inorganic non-metallic polymer material, especially a kind of to utilize red mud and fine coal
The method that ash prepares geology polymer material belongs to comprehensive utilization of waste and building materials preparation technical field.
Background technique
Red mud is that aluminium industry extracts the waste residue being discharged when aluminium oxide, is the strong alkaline substance for having pollution to environment,
And a large amount of dust easy to form and haze during storage, it pollutes the environment.According to measuring and calculating, the whole world generates red every year
About 70,000,000 tons of mud, the red mud that China generates every year has 30,000,000 tons or more.A large amount of red mud is stored up by the stockyard of large area,
A large amount of soils are occupied, also environment are caused seriously to pollute.The generation of red mud causes various aspects to the production of the mankind, life
Influence, therefore, realize resource utilization is extremely urgent by all kinds of means, on a large scale.Flyash is from the flue gas after coal combustion
The particle that middle catching is got off is the primary solids waste of coal-burning power plant's discharge, in recent years, in many ready mixed concretes, soil
The fields such as wood engineering construction, subgrade construction are utilized.But be only capable of applying as auxiliary material, as social development makes the transition,
Decline trend can be presented in its following dosage in civil engineering, will form a large amount of accumulation and influence environment.How powder is expanded
The application field of coal ash will also become one of the important directions of construction material research future development.After retrieving the relevant literature, domestic
Being worked using all having carried out a large amount of experimental research in every profession and trade to red mud, flyash outside, and obtain good application
Prospect, but due to technology, economic aspect, the technology to put into practice is not much.
Summary of the invention
The object of the present invention is to provide a kind of using red mud and coal ash for manufacturing for the method for geology polymer material, by red mud
As a kind of raw mineral materials, a kind of geology polymer material is formed with the flyash for being all industrial solid castoff, can be used as and build
Material is built applied in Practical Project.
To achieve the above object, technical idea of the invention is: playing red mud as main component with aluminium silicate salt
Strong basicity high dispersive slag characteristic has hydraulic gelling property in the case where there is alkali-activator effect, and the heat of hydration is low, is conducive to red mud
The formation of mineral geo-polymer cementitious material at reaction conditions.Contain a large amount of SiO in flyash2、Al2O3And vitreum
Deng with pozzolanic activity particle, and have very big specific surface energy, low-density, high osmosis and low compressibility, these at
The advantage of high-intensitive mineral polymer is prepared for it.Using in the alkali and aluminate and flyash of high-content in red mud
Glass phase silicate, then depolymerization and polycondensation brought it about by the effect of the further alkali-activated carbonatite of NaOH solution have to be formed
The geology polymer material of the network jelling structure of higher-strength.By changing reaction condition, the type of exciting agent is adjusted, is obtained
The polymer of varying strength becomes the geology polymer material with excellent engineering property.
Specifically, it is of the invention it is a kind of using red mud and coal ash for manufacturing for the method for geology polymer material, including it is following
Step:
(1) by red mud, flyash natural air drying, until water content mass content 30%~35%, crosses 0.3mm~0.6mm circle
Hole sizer packs respectively, moisture-proof, spare；
(2) sodium hydroxide solution is prepared, it is spare；
(3) red mud and flyash are weighed respectively by quality proportioning, be first mixed and stirred for red mud and flyash uniformly, then plus
Enter sodium hydroxide solution to stir 5~10 minutes, be mixed thoroughly in mortar mixer, be subsequently poured into be coated with release agent cement mortar it is anti-
It presses in die trial, smashes even, be put on shake table and be vibrated to mortar surface pulp, and strike off；
(4) die trial is laid flat 24~28 hours, is demoulded, in room temperature (20 DEG C~25 DEG C) or 65 DEG C ± 2 DEG C, supported in fog room
It protects to design age；
(5) intensity test is carried out to the test specimen of different larval instar.
Method of the invention preferably in mass ratio, red mud: after F grades of flyash=1:1 mixing, adds red
The Nano-meter SiO_2 of mud and flyash gross mass 2%2Mixing, consolidate mass ratio, i.e. sodium hydroxide solution by liquid: (red mud+flyash+is received
Rice SiO2)=0.6, by sodium hydroxide solution and red mud, flyash, Nano-meter SiO_22Mixture mixing, wherein sodium hydroxide solution
Mass fraction is 10%.
Method of the invention, preferably, in mass ratio, i.e. red mud: C grades of flyash=1:1 mixing, by liquid stereoplasm
The mass ratio of amount ratio, sodium hydroxide solution and red mud, mixture of fly ash is 0.5, by sodium hydroxide solution and red mud, flyash
Mixture mixing, wherein sodium hydroxide solution mass fraction be 3.5%.
Method of the invention, preferably, in mass ratio, i.e. red mud: F grades of flyash=2:8 mixing, by liquid stereoplasm
The mass ratio of amount ratio, sodium hydroxide solution and red mud, mixture of fly ash is 0.5, by sodium hydroxide solution and red mud, flyash
Mixture mixing, wherein sodium hydroxide solution mass fraction be 10%.
The beneficial effect that the present invention obtains is: preparation method of the invention is simple, prepared geology polymer material
It can be widely applied to construction material manufacture, roadbed filling, the various fields such as material of body of a pile had both solved pollution of the red mud for environment
Problem also makes full use of the characteristic of red mud, plays positive impetus to the comprehensive utilization of red mud and flyash.
Specific embodiment
The following examples are intended to illustrate the invention.
Embodiment 1
Raw material proportioning scheme such as table 1: table 1
By required raw material red mud, flyash natural air drying at aeration-drying, until moisture content is not more than 35%, after air-drying
0.3mm~0.6mm round-hole mesh is crossed, is packed respectively, it is moisture-proof spare；Prepare the sodium hydroxide solution that mass percent concentration is 10%
It is spare.
Red mud and F grades of flyash are weighed into red mud, flyash in the ratio of 1:1 respectively, with liquid-solid ratio, i.e. sodium hydroxide is molten
The ratio of liquid and red mud, mixture of fly ash is 0.6 weighing sodium hydroxide solution, is first stirred evenly red mud and flyash, then fall
Enter sodium hydroxide solution to stir 5~10 minutes, be mixed uniform in mortar mixer, by the red mud stirred evenly, coal ash pulp
It pours into and is coated in the cement mortar resistance to compression die trial of release agent, it is uniform with steel tamper ramming, it is put on shake table and is vibrated to mortar
Surface pulp, and strike off.Die trial is laid flat 24 hours and is demoulded, (65 DEG C of temperature, humidity 100%) maintenances are placed in laboratory.It presses
The strain rate of 0.3mm/min, tests different larval instar compression strength respectively, and test result is shown in Table 1.
Embodiment 2
Raw material proportioning scheme such as table 2: table 2
By required raw material red mud, flyash natural air drying at aeration-drying, until moisture content is not more than 35%, it air-dries
0.3mm~0.6mm round-hole mesh is crossed afterwards, is packed respectively, it is moisture-proof spare.Prepare the sodium hydroxide that mass percent concentration is 3.5%
Solution for standby.Red mud, C grade flyash are weighed respectively by the mass ratio of 1:1, are 0.5 weighing sodium hydroxide solution by liquid-solid ratio.
First red mud and flyash are stirred evenly, then pours into sodium hydroxide solution and stirs 5~10 minutes, in mortar mixer
In mix uniform.The red mud mixed uniform, coal ash pulp are poured into and are coated in the cement mortar resistance to compression die trial of release agent, steel is used
Tamper ramming is uniform, is put on shake table and is vibrated to mortar surface pulp, and strikes off.Die trial is laid flat 24 hours and is demoulded, is placed in
(22 DEG C ± 2 DEG C of temperature) conserves in laboratory.By the strain rate of 0.3mm/min, 3 days, 14 days, the examination of 28 day age are tested respectively
The compression strength of part.Test result is shown in Table 2.
Embodiment 3
3 table 3 of raw material proportioning scheme table
By required raw material red mud, flyash, natural air drying to water content is not more than 35% at aeration-drying, after air-drying
0.3mm~0.6mm round-hole mesh is crossed, is packed respectively, it is moisture-proof spare.Red mud and F grades of fine coal are weighed respectively by the mass ratio of 2:8
Ash weighs clear water with liquid-solid ratio 0.25.
First red mud and flyash are stirred evenly, stirs 5~10 minutes, is mixed uniform in mortar mixer.By mixing
Uniform red mud, coal ash pulp are poured into and are had been coated in the cement mortar resistance to compression die trial of release agent, uniform with steel tamper ramming, are put
In being vibrated to mortar surface pulp on shake table, and strike off.Die trial is laid flat 24 hours and is demoulded, be placed in fog room (65 DEG C,
100% humidity) maintenance.By the strain rate of 0.3mm/min, 3 days, 14 days, the compression strength of 28 day age test specimen are tested respectively.
Test result is shown in Table 3.
Embodiment 4
4 table 4 of raw material proportioning scheme table
By required raw material red mud, flyash, natural air drying to water content is not more than 35% at aeration-drying, after air-drying
0.3mm~0.6mm round-hole mesh is crossed, is packed respectively, it is moisture-proof spare.Prepare the sodium hydroxide solution that mass percent concentration is 10%
It is spare.Red mud and F grades of flyash are weighed respectively by the mass ratio of 2:8, and sodium hydroxide solution is weighed with liquid-solid ratio 0.5.
First red mud and flyash are stirred evenly, then pours into water and stirs 5~10 minutes, mixing is equal in mortar mixer
It is even.The red mud mixed uniform, coal ash pulp are poured into and had been coated in the cement mortar resistance to compression die trial of release agent, is smash with steel tamper
System uniformly, is put on shake table and is vibrated to mortar surface pulp, and strike off.Die trial is laid flat 24 hours and is demoulded, fog room is placed in
Interior (65 DEG C, 100% humidity) maintenances.By the strain rate of 0.3mm/min, 3 days, 14 days, 28 day age test specimen are tested respectively
Compression strength.Test result is shown in Table 4.
Claims (3)
1. it is a kind of using red mud and coal ash for manufacturing for the method for geology polymer material, it is characterised in that the following steps are included:
(1) by red mud, flyash natural air drying, until water content 30%~35%, crosses 0.3mm~0.6mm round-hole mesh, packs respectively,
It is moisture-proof, it is spare；
Wherein, flyash includes C grades and two kinds of F grade；
(2) sodium hydroxide solution is prepared, it is spare；
(3) red mud and flyash are weighed respectively by quality proportioning 1:1, be first mixed and stirred for red mud and flyash uniformly, then plus
Enter sodium hydroxide solution to stir 5~10 minutes, be mixed thoroughly in mortar mixer, be subsequently poured into be coated with release agent cement mortar it is anti-
It presses in die trial, smashes even, be put on shake table and be vibrated to mortar surface pulp, and strike off；
(4) die trial is laid flat 24 hours~28 hours, is demoulded, wherein be using C grades of flyash as raw material at 20 DEG C~25 DEG C；Or
100%, 65 DEG C ± 2 DEG C of humidity, be using F grades of flyash as raw material；It conserves to design age；
(5) intensity test is carried out to the test specimen of different larval instar.
2. according to the method described in claim 1, it is characterized in that step (3), in mass ratio, red mud: F grades of flyash=1:1 are mixed
The Nano-meter SiO_2 of red mud Yu flyash gross mass 2% is added after conjunction2Mixing, consolidates mass ratio, sodium hydroxide solution: (red mud by liquid
+ flyash+Nano-meter SiO_22)=0.6, by sodium hydroxide solution and red mud, flyash, Nano-meter SiO_22Mixture mixing, wherein hydrogen
Sodium hydroxide solution mass fraction is 10%.
3. according to the method described in claim 1, it is characterized in that step (3), in mass ratio, red mud: C grades of flyash=1:1 are mixed
Consolidate mass ratio by liquid after conjunction, the mass ratio of sodium hydroxide solution and red mud, mixture of fly ash is 0.5, by sodium hydroxide solution
It is mixed with red mud, flyash, wherein sodium hydroxide solution mass fraction is 3.5%.
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US10407343B2 (en) * | 2017-06-02 | 2019-09-10 | University Of Tennessee Research Foundation | Method of producing geopolymer cement utilizing desulfurized red mud |
| CN108249788B (en) * | 2017-12-21 | 2020-09-22 | 中国建筑材料科学研究总院有限公司 | Alkali-activated cementing material and preparation method thereof |
| CN108455887B (en) * | 2018-03-13 | 2019-01-25 | 山东大学 | Utilize the method for bored slag method collaboration red mud preparation solid waste base geological polymer |
| CN108755664B (en) * | 2018-05-29 | 2020-09-01 | 河北建设勘察研究院有限公司 | Pile body heating device and heating method for red mud fly ash geopolymer pile |
| CN108677932B (en) * | 2018-05-29 | 2020-09-01 | 河北建设勘察研究院有限公司 | Construction method of red mud coal ash geopolymer pile with pile body capable of being heated |
| 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 |
| CN113416025B (en) * | 2021-04-29 | 2023-05-09 | 浙江天地环保科技股份有限公司 | Quick-hardening high-strength fly ash geopolymer material and preparation method thereof |
| CN115196895A (en) * | 2022-06-23 | 2022-10-18 | 北京交通大学 | Red mud and C-type fly ash geopolymer and preparation method thereof |
| CN116891354B (en) * | 2023-08-08 | 2024-06-21 | 中冀建勘集团有限公司 | Quick-setting red mud and fly ash geopolymer grouting material and preparation method thereof |
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| CN103664085A (en) * | 2013-12-06 | 2014-03-26 | 中国科学院地球化学研究所 | Red mud-fly ash polymerization type inorganic cementing material, preparation method and application thereof |
| CN103896503A (en) * | 2014-03-06 | 2014-07-02 | 焦作丁豪科技股份有限公司 | Novel red-mud-based grouting material and preparation method thereof |
| CN104098281A (en) * | 2013-04-03 | 2014-10-15 | 神华集团有限责任公司 | Geopolymer composition, geopolymer material and preparation method thereof |
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| US9321687B2 (en) * | 2013-07-03 | 2016-04-26 | University Of North Dakota | Low concentration alkali fly ash cement and method of making |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104098281A (en) * | 2013-04-03 | 2014-10-15 | 神华集团有限责任公司 | Geopolymer composition, geopolymer material and preparation method thereof |
| CN103664085A (en) * | 2013-12-06 | 2014-03-26 | 中国科学院地球化学研究所 | Red mud-fly ash polymerization type inorganic cementing material, preparation method and application thereof |
| CN103896503A (en) * | 2014-03-06 | 2014-07-02 | 焦作丁豪科技股份有限公司 | Novel red-mud-based grouting material and preparation method thereof |
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