CN108774043A - It is highly doped than red mud construction material - Google Patents
It is highly doped than red mud construction material Download PDFInfo
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- CN108774043A CN108774043A CN201810847445.1A CN201810847445A CN108774043A CN 108774043 A CN108774043 A CN 108774043A CN 201810847445 A CN201810847445 A CN 201810847445A CN 108774043 A CN108774043 A CN 108774043A
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- red mud
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- highly doped
- modifying agent
- chromium slag
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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
- 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
- C04B28/30—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 magnesium cements or similar cements
- C04B28/32—Magnesium oxychloride cements, e.g. Sorel cement
-
- 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
Abstract
It is highly doped than red mud construction material, including red mud, chromium slag, light-burning magnesium powder, magnesium chloride bittern, water-reducing agent；Flyash and modifying agent；Red mud raw material are uniformly mixed with chromium slag, light-burning magnesium powder is uniformly mixed and is added in magnesium chloride bittern with red mud, chromium slag premix, add modifying agent after stirring 2~5min, continue that water-reducing agent is added after stirring 3min；It keeps the skin wet into red mud, chromium slag composite material raw material powder, the magnesia gel complex material slurry of red mud is obtained after being sufficiently stirred, the magnesia gel complex material slurry of the red mud is poured into mold, it is highly doped than red mud construction material that demoulding obtains this.With it is highly doped than red mud under conditions of, have excellent flexural strength, compression strength, coefficient of softing, be suitable for most of architectural environments.The problems such as without scumming, meets the requirement in many-sided field in all various aspects such as road, bridge, house.So as to greatly utilize red mud, chromium slag for comprehensive, red mud is reduced, chromium slag stacks caused problem of environmental pollution.
Description
Technical field
The present invention relates to structure material technical field, more particularly to one kind are highly doped than red mud construction material.
Background technology
Red mud integrated treatment and its Utilizing question are a global problems.In recent years, add with to environmental protection
By force, the emission behaviour of red mud has larger improvement, but this can not fundamentally change red mud and ask the pollution of environment
Topic.It only realizes red mud resource utilization, can just tackle the problem at its root.
For this purpose, domestic and foreign scholars have done a large amount of research work to the integrated treatment of red mud, also achieve many significant
Progress.But that there are red mud volumes is low, red mud utilization rate is low for existing red mud method of resource at present, the shortcomings of high energy consumption,
Red mud can not largely be consumed.For example, existing red mud is as construction material, currently only according to the mark of other similar construction materials
Standard, as standard support.Traction is low, and the application of product is caused to receive limitation, it is difficult to be promoted on a large scale.And phase
For existing cement, the parameters such as resistance to compression, anti-folding are unable to reach corresponding requirement, therefore are not suitable for most of buildings
The case where materials.Therefore how red mud efficiently rationally to be utilized, becomes the technical barrier in this field.
Invention content
That there are red mud volumes purpose of the present invention is to solving existing red mud construction material is low, red mud utilization rate is low, high energy consumption,
It the defects of red mud can not largely be consumed, provides a kind of highly doped than red mud construction material, its properties is made to reach using mark
It is accurate.
It is highly doped than red mud construction material, including following raw material according to the mass fraction are prepared：1200 parts of red muds,
1200 parts of chromium slags, 600 parts of light-burning magnesium powders, 672 parts of magnesium chloride bitterns, 4 parts of water-reducing agents；It is characterized in that, further include flyash and
Modifying agent；Red mud be crushed into 30 mesh and sieve to obtain red mud raw material, red mud raw material are uniformly mixed with chromium slag, obtain red mud, chromium
Slag premix；Light-burning magnesium powder is uniformly mixed and is added in magnesium chloride bittern with the red mud, chromium slag premix, stirring 2~
Add modifying agent after 5min, continues that water-reducing agent is added after stirring 3min, obtain red mud, chromium slag composite material raw material powder；To red mud, chromium
It keeps the skin wet in slag composite material raw material powder so that red mud, chromium slag composite material raw material powder and biodiversity ratio are 100:30~
100:50, the magnesia gel complex material slurry of red mud is obtained after being sufficiently stirred, and the magnesia gel complex material of the red mud is starched
Expect to pour into mold, concussion molding is conserved 6~24 hours and demoulded, natural curing after demoulding, and it is highly doped than red mud building to obtain this
Material.
Wherein, the modifying agent is phosphoric acid modification agent；Further include 30 parts of phosphoric acid modification agent and 60- as mass fraction
360 parts of flyash.
Wherein, further include 30 parts of phosphoric acid modification agent and 180 parts of flyash as mass fraction.
Wherein, further include silica flour；Further include 20-100 parts of silica flours as mass fraction.
Wherein, the modifying agent is phosphoric acid modification agent, sodium citrate modifying agent and oxalic acid modifying agent；As mass fraction
Further include 4.98 parts of phosphoric acid modification agent, 15 parts of sodium citrate modifying agent, 25.12 parts of oxalic acid modifying agent and 30-150 parts of fine coal
Ash.
Wherein, the modifying agent is phosphoric acid modification agent, sodium citrate modifying agent and oxalic acid modifying agent；As mass fraction
Further include 4.98 parts of phosphoric acid modification agent, 15 parts of sodium citrate modifying agent, 25.12 parts of oxalic acid modifying agent and 60 parts of flyash.
Wherein, light-burning magnesium powder uses hydration method to measure activity as 56.375%.
Wherein, the molar ratio of activated magnesia and magnesium chloride is 5 in the light-burning magnesium powder:1~9:1, the light-burned oxidation
The optimum molar ratio of activated magnesia and magnesium chloride is 5 in magnesium:1.
Wherein, the pH value of red mud is 12.23.
The present invention has the advantages that：With it is highly doped than red mud under conditions of, the red mud construction material have it is excellent
Good flexural strength, compression strength, coefficient of softing are suitable for most of architectural environments.The problems such as without scumming, road,
All various aspects such as bridge, house meet the requirement in many-sided field.So as to greatly utilize red mud, chromium slag for comprehensive, subtract
Few red mud, chromium slag stack caused problem of environmental pollution.
Description of the drawings
Fig. 1 is 28 days flexural strength column diagrams in the embodiment of the present invention 1；
Fig. 2 is 28 days compression strength column diagrams in the embodiment of the present invention 1；
Fig. 3 is 7 days coefficient of softing datagrams in the embodiment of the present invention 1.
Specific implementation mode
Explanation of nouns
(1) heretofore described " light calcined magnesia " refers to that magnesium hydroxide is discharged after 700~1000 DEG C or so calcinings
CO2Or H2The product obtained after O, the magnesium hydroxide is from magnesite, shepardite and by being extracted in seawater or brine.
(2) heretofore described " activated magnesia " refers to that average grain diameter is less than 2000nm；Microscopic pattern is irregular
Grain or subsphaeroidal particle or flat crystal；It is that 12~25s (get over by the smaller activity of numerical value with the activity that citric acid (CAA values) indicates
It is high)；It is 80~120 (mgI/100gMgO) with the activity that iodine absorption value indicates；Specific surface is in 5~20m3Between/g, depending on specific volume 6~
Between 8.5mL/g.
(3) detection method of flexural strength
Material Testing Machine：The formula value relative error of testing machine is not more than ± 1%, and lower pressure plate should be ball hinged support, in advance
Phase maximal destruction load should be between the 20%~80% of range.
Experimental procedure：
1) width and height dimension of measurement experiment, and record；
2) the big face of sample is placed on lower branch rod, sample both ends of the surface are answered identical at a distance from lower branch rod, are split when sample has
, will be face-down greatly when line or recess, with the speed continuous load of (50~150) N/s, until sample fracture, records maximum load
P。
3) data of maximum load are calculated into maximum flexural strength further according to anti-folding formula, and made a record.
Flexural strength (δ F) following formula of every piece of sample calculates：
In formula：δF- strength at normal temperature, Mpa；
Fmax- the maximum pressure that sample is applied, N
LsDistance between the-lower edge of a knife, mm；
B-specimen width, mm；
H-specimen height, mm.
Experimental result is indicated with the arithmetic average Rf of flexural strength.
(4) detection method of compression strength
1) the length and width size for measuring each experiment joint face or compression face, is accurate to 1mm；
2) uniform and stable is answered in the center that sample is lain in pressure plate perpendicular to compression face loading, must not impact
Or vibration, loading speed are advisable with (2~6) KN/s, and maximal destruction load p is recorded until sample destroys.
3) data of maximum load are calculated into maximum flexural strength further according to anti-folding formula, and made a record.
4) result of calculation and evaluation
Flexural strength (the f of every piece of samplec) be calculated as follows：
In formula:fc- compression strength (Mpa)；Maximum load (KN) when Fmax-test specimen compression damage；
A-bearing area (mm2)
Experimental result is indicated with the arithmetic average and standard value of flexural strength.
(5) coefficient of softing
Specific test method is will to be conserved 28 days after specimen molding, tests the compression strength of a portion test specimen
Rco, another part are completely immersed in water, after impregnating 7 days, are taken out test specimen and are wiped the moisture measurement on its surface its compression strength
The water-fast COEFFICIENT K cn of Rcw, test specimen are calculated as the following formula:
Kcn=Rcw/Rco
For coefficient of softing value range between 0-1, value is bigger, shows that the water resistance of material is better.Coefficient of softing
Size sometimes referred to as selects the foundation of material.It is chronically in water or the important building or structures of wet environment, it must
The material that coefficient of softing must be selected to be more than 0.85.For by moist relatively light or secondary structure material, then coefficient of softing to be unsuitable small
In 0.70.It has been generally acknowledged that material of the coefficient of softing more than 0.85 is water-resistant material.
(6) each raw material is described below in the present invention：
1) red mud comes from Henan China east and wishes Sanmenxia Gorge Aluminum Co., Ltd, and red mud used crosses 30 mesh in experiment,
PH value is 12.23, and red mud type is Bayer process, and chemical composition is shown in Table 1-1；
The chemical composition (XRF) of table 1-1 red muds
2) light calcined magnesia comes from Liaoning Province Haicheng City, and calcination temperature, through analysis, tests institute between 800 DEG C~850 DEG C
Hydration method is used to measure activity as 56.375% with magnesia；
3) chromium slag that the chromium slag that this experiment uses is stored up within the border for Henan Province Yima City；
4) flyash is selected from Yima, henan Province electric power flyash
Silicon ash is selected from Shandong Bo Ken silicon materials Co., Ltd
5) antifoaming agent tributyl phosphate is purchased from the sub- safe joint Chemical Co., Ltd. of Wuxi City；
6) water-reducing agent is purchased from Shaanxi Qin Fen building materials Co., Ltd.
It is highly doped than red mud construction material, including following raw material according to the mass fraction are prepared：1200 parts of red muds,
1200 parts of chromium slags, 600 parts of light-burning magnesium powders, 672 parts of magnesium chloride bitterns, 4 parts of water-reducing agents, flyash and modifying agent；Red mud is crushed
It crosses 30 mesh and sieves to obtain red mud raw material, red mud raw material are uniformly mixed with chromium slag, obtain red mud, chromium slag premix；By magnesia unslacked
Powder is uniformly mixed and is added in magnesium chloride bittern with the red mud, chromium slag premix, adds modifying agent after stirring 2~5min, continues
Water-reducing agent is added after stirring 3min, obtains red mud, chromium slag composite material raw material powder；It is mended into red mud, chromium slag composite material raw material powder
Water-filling point so that red mud, chromium slag composite material raw material powder and biodiversity ratio are 100:30~100:50, after being sufficiently stirred
To the magnesia gel complex material slurry of red mud, the magnesia gel complex material slurry of the red mud is poured into mold, concussion at
Type is conserved 6~24 hours and is demoulded, and it is highly doped than red mud construction material to obtain this for natural curing after demoulding.
Wherein, magnesium chloride is configured to the aqueous solution that mass percent concentration is 20~30%, and antifoaming agent is added, fully stirs
It mixes, until magnesium chloride solution the removal of foam, it is magnesium chloride bittern to become clear solution.
Wherein, the molar ratio of activated magnesia and magnesium chloride is 5 in light-burning magnesium powder:1~9:1, in the light calcined magnesia
The optimum molar ratio of activated magnesia and magnesium chloride is 5:1.Light-burning magnesium powder uses hydration method to measure activity as 56.375%.Its
In, the pH value of red mud is 12.23.
Embodiment 1：The modifying agent is phosphoric acid modification agent；It is 30 parts of phosphoric acid modification agent and 60-360 as mass fraction
Part flyash.Preferably, it is as mass fraction 30 parts of phosphoric acid modification agent and 180 parts of flyash.Preferably, the phosphoric acid changes
Property agent is the phosphoric acid solution that mass percentage concentration is 25%.
For embodiment 1, it is divided into five groups and is tested for the property, five groups specifically matches situation and see the table below：
It is tested for the property for above-mentioned five groups, test result see the table below or see shown in Fig. 1-3：
Embodiment 2 further includes silica flour；It is 20-100 parts of silica flours as mass fraction.
For embodiment 2, it is divided into five groups and is tested for the property, five groups specifically matches situation and see the table below：
It is tested for the property for above-mentioned five groups, test result see the table below：
Embodiment 3, the modifying agent are phosphoric acid modification agent, sodium citrate modifying agent and oxalic acid modifying agent；By mass fraction
It is calculated as, 4.98 parts of phosphoric acid modification agent, 15 parts of sodium citrate modifying agent, 25.12 parts of oxalic acid modifying agent and 30-150 parts of flyash.
Preferably, be as mass fraction 4.98 parts of phosphoric acid modification agent, 15 parts of sodium citrate modifying agent, 25.12 parts of oxalic acid modifying agent and
60 parts of flyash.
Wherein, the phosphoric acid modification agent is the phosphoric acid solution that mass percentage concentration is 25%.Sodium citrate modifying agent is matter
Measure the sodium citrate solution that percentage concentration is 20-25%.Oxalic acid modifying agent is that the oxalic acid that mass percentage concentration is 20-25% is molten
Liquid.
For embodiment 3, it is divided into five groups and is tested for the property, five groups specifically matches situation and see the table below：
It is tested for the property for above-mentioned five groups, test result see the table below：
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；To the greatest extent
Present invention has been described in detail with reference to the aforementioned embodiments for pipe, it will be understood by those of ordinary skill in the art that：It is still
Can be with technical scheme described in the above embodiments is modified, or which part technical characteristic is equally replaced
It changes；And these modifications or replacements, the essence for various embodiments of the present invention technical solution that it does not separate the essence of the corresponding technical solution
God and range.
Claims (9)
1. following raw material highly doped than red mud construction material, including according to the mass fraction are prepared：1200 parts of red muds, 1200
Part chromium slag, 600 parts of light-burning magnesium powders, 672 parts of magnesium chloride bitterns, 4 parts of water-reducing agents；It is characterized in that, further including flyash and modification
Agent；Red mud be crushed into 30 mesh and sieve to obtain red mud raw material, red mud raw material are uniformly mixed with chromium slag, it is pre- to obtain red mud, chromium slag
Batch mixing；Light-burning magnesium powder is uniformly mixed and is added in magnesium chloride bittern with the red mud, chromium slag premix, after stirring 2~5min
Add modifying agent, continues that water-reducing agent is added after stirring 3min, obtain red mud, chromium slag composite material raw material powder；To red mud, chromium slag composite wood
It keeps the skin wet in material raw material powder so that red mud, chromium slag composite material raw material powder and biodiversity ratio are 100:30~100:50, it fills
The magnesia gel complex material slurry of red mud is obtained after dividing stirring, the magnesia gel complex material slurry of the red mud is poured into mold
In, concussion molding is conserved 6~24 hours and is demoulded, and it is highly doped than red mud construction material to obtain this for natural curing after demoulding.
2. according to claim 1 highly doped than red mud construction material, which is characterized in that the modifying agent is phosphoric acid modification
Agent；Further include 30 parts of phosphoric acid modification agent and 60-360 parts of flyash as mass fraction.
3. according to claim 2 highly doped than red mud construction material, which is characterized in that further include 30 as mass fraction
Part phosphoric acid modification agent and 180 parts of flyash.
4. according to claim 2 highly doped than red mud construction material, which is characterized in that further include silica flour；By mass fraction
Meter further includes 20-100 parts of silica flours.
5. according to claim 1 highly doped than red mud construction material, which is characterized in that the modifying agent is phosphoric acid modification
Agent, sodium citrate modifying agent and oxalic acid modifying agent；Further include 4.98 parts of phosphoric acid modification agent, 15 parts of citric acids as mass fraction
Sodium modifying agent, 25.12 parts of oxalic acid modifying agent and 30-150 parts of flyash.
6. according to claim 5 highly doped than red mud construction material, which is characterized in that the modifying agent is phosphoric acid modification
Agent, sodium citrate modifying agent and oxalic acid modifying agent；Further include 4.98 parts of phosphoric acid modification agent, 15 parts of citric acids as mass fraction
Sodium modifying agent, 25.12 parts of oxalic acid modifying agent and 60 parts of flyash.
7. highly doped than red mud construction material according to claim 1-6 any one of them, which is characterized in that light-burning magnesium powder uses water
The legal activity that measures is 56.375%.
8. according to claim 7 highly doped than red mud construction material, which is characterized in that active oxidation in the light-burning magnesium powder
The molar ratio of magnesium and magnesium chloride is 5:1~9:1, the optimum molar ratio of activated magnesia and magnesium chloride is in the light calcined magnesia
5:1。
9. according to claim 8 highly doped than red mud construction material, which is characterized in that the pH value of red mud is 12.23.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810847445.1A CN108774043B (en) | 2018-07-27 | 2018-07-27 | High-doping-ratio red mud building material |
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|---|---|---|---|
| CN201810847445.1A CN108774043B (en) | 2018-07-27 | 2018-07-27 | High-doping-ratio red mud building material |
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