CN108689721A - A kind of Pb-Zn tailings powder air entrained concrete of carbon fiber-containing and preparation method thereof - Google Patents
A kind of Pb-Zn tailings powder air entrained concrete of carbon fiber-containing and preparation method thereof Download PDFInfo
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- CN108689721A CN108689721A CN201810611015.XA CN201810611015A CN108689721A CN 108689721 A CN108689721 A CN 108689721A CN 201810611015 A CN201810611015 A CN 201810611015A CN 108689721 A CN108689721 A CN 108689721A
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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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/02—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding chemical blowing agents
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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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/38—Fibrous materials; Whiskers
- C04B14/386—Carbon
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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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/12—Waste materials; Refuse from quarries, mining or the like
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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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/026—Comminuting, e.g. by grinding or breaking; Defibrillating fibres other than asbestos
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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
- C04B28/18—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 mixtures of the silica-lime type
- C04B28/186—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 mixtures of the silica-lime type containing formed Ca-silicates before the final hardening step
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
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- Materials Engineering (AREA)
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- Inorganic Chemistry (AREA)
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- Environmental & Geological Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses Pb-Zn tailings powder air entrained concrete of a kind of carbon fiber-containing and preparation method thereof, count in parts by weight, and the raw material of the Pb-Zn tailings powder air entrained concrete includes:1 ~ 3 part of 30 ~ 40 parts of cement, 15 ~ 20 parts of quick lime, 15 ~ 20 parts of quartz sand, 10 ~ 15 parts of flyash, 6 ~ 8 parts of desulfurated plaster, 3 ~ 5 parts of aluminium powder, 0.1 ~ 0.3 part of carbon fiber, 12 ~ 14 parts of the Pb-Zn tailings powder of activation and hydroxypropyl starch ether.Foaming agent is being added by the way that the Pb-Zn tailings powder, hydroxypropyl starch ether and the carbon fiber that activate is added in the air entrained concrete of the present invention(Aluminium powder)Aerated concrete products are made in steam press maintenance afterwards, and compression strength greatly enhances, up to 8.3 ~ 9.4MPa, but also is provided with certain plasticity(Fracture elongation is 05 ~ 0.75%, and the fracture elongation of traditional aerated concrete products is generally 0), it is suitable for a variety of building fields.
Description
Technical field
The invention belongs to air entrained concrete technical fields, and in particular to a kind of Pb-Zn tailings powder aerating coagulation of carbon fiber-containing
Soil and preparation method thereof.
Background technology
Steam-pressing aero-concrete is by cement(Or part water-granulated slag, quick lime replace)With material (such as sand, powder
Coal ash, mine tailing etc.)By levigate and and foaming agent(Such as aluminium powder)And other materials proportions, then poured through slurry, it sends out
Gas is molded, quiet to stop hardening, green body cutting and steam curing(Steam pressure is steam-cured)Etc. a kind of porous construction material made of processes.
Simultaneously as its porosity, air entrained concrete is also a kind of excellent heat preserving and insulating material.Bubble is introduced by foaming agent to generate
Minute pores be air entrained concrete chief component.In China, air entrained concrete is initially intended only as a kind of for choosing
The novel wall material selected.In recent years, the continuous attention with the whole world to energy-saving and emission-reduction and ecological protection, people gradually recognize
The outstanding representation that air entrained concrete utilizes etc. in energy saving, section material, industrial solid castoff, to the research day of air entrained concrete
Benefit is taken seriously.
Invention content
It is an object of the invention in view of the shortcomings of the prior art, providing a kind of Pb-Zn tailings powder aerating coagulation of carbon fiber-containing
Soil and preparation method thereof.The air entrained concrete of the present invention is by being added the Pb-Zn tailings powder, hydroxypropyl starch ether and the carbon that activate
Foaming agent is being added in fiber(Aluminium powder)Aerated concrete products are made in steam press maintenance afterwards, and compression strength greatly enhances, up to
8.3 ~ 9.4MPa, but also it is provided with certain plasticity(Fracture elongation is 0.5 ~ 0.75%, and traditional aerated concrete products
Fracture elongation be generally 0), it is suitable for a variety of building fields.
To achieve the above object, the present invention adopts the following technical scheme that:
A kind of Pb-Zn tailings powder air entrained concrete of carbon fiber-containing, is counted, raw material includes in parts by weight:30 ~ 40 parts of cement, life
15 ~ 20 parts of lime, 15 ~ 20 parts of quartz sand, 10 ~ 15 parts of flyash, 6 ~ 8 parts of desulfurated plaster, 3 ~ 5 parts of aluminium powder, carbon fiber 0.1 ~ 0.3
1 ~ 3 part of part, 12 ~ 14 parts of the Pb-Zn tailings powder of activation and hydroxypropyl starch ether;The preparation method of the Pb-Zn tailings powder of the activation
For:After Pb-Zn tailings powder is ground, grinding aid is added, is handled using high-frequency vibration mill, 2 ~ 5mm of amplitude, vibration frequency 13.8 ~
15.8 times, 8 ~ 10 min of time of vibration;The specific surface area of Pb-Zn tailings powder after activation is 348.12m2/kg~365.44m2/kg。
Preferably, the Pb-Zn tailings powder air entrained concrete of a kind of carbon fiber-containing, is counted, raw material includes in parts by weight:Water
36 parts of mud, 18 parts of quick lime, 17 parts of quartz sand, 12 parts of flyash, 7 parts of desulfurated plaster, 4 parts of aluminium powder, 0.2 part of carbon fiber, activation
13.5 parts of Pb-Zn tailings powder and 2 parts of hydroxypropyl starch ether;The preparation method of the Pb-Zn tailings powder of the activation is:By lead zinc tail
After miberal powder grinding, grinding aid is added, is handled using high-frequency vibration mill, amplitude 3.5mm, vibration frequency is 14.3 times, when vibration
Between 10 parts;The specific surface area of Pb-Zn tailings powder after activation is 354.12m2/kg。
The preparation method of the Pb-Zn tailings powder air entrained concrete of carbon fiber-containing as described above, specifically includes following steps:
(1)Quick lime, quartz sand and flyash are put into ball milling 20min in ball mill, then throw the mixed material after polishing
Enter into blender;
(2)Be added in the blender cement, desulfurated plaster, activation Pb-Zn tailings powder, hydroxypropyl starch ether and water, solid-liquid ratio is
1:(1~1.5), stir 50 ~ 90s;Then carbon fiber is added, continues 30 ~ 40s of stirring;Be eventually adding aluminium powder, continue stirring 15 ~
30s;
(3)By step(2)Obtained slurry carries out steam press maintenance after pouring into a mould, getting angry, stand, demould, and it is mixed that the aerating is made
Solidifying soil.
Step(3)Described in steam press maintenance during, vapor (steam) temperature be 187 ~ 190 DEG C, soaking time be 7 ~ 8h, heating
Rate is 1.2 ~ 1.5 DEG C/min, and pressure is 1.2 ~ 1.25MPa.
The beneficial effects of the present invention are:
(1)The Pb-Zn tailings powder being added in the air entrained concrete of the present invention has carried out activation process, by Oscillation Amplitude, vibration
The control of frequency and time of vibration controls the grain size of Pb-Zn tailings powder so that the specific surface of the Pb-Zn tailings powder after activation
Product is 348.12m2/kg~365.44m2/kg(Preferably 354.12m2/kg);Under the particle diameter fineness so that the mobility of slurry
It improves, hydroxypropyl starch ether is added in cooperation can make the consistency of slurry moderate again, the shape of a large amount of tiny in this way and uniform stomata
At making the Absolute Dry Density of product reduce;The consistency of slurry can be made to be deteriorated in casting process if meticulous Pb-Zn tailings powder
In the ruptures of a large amount of stomatas so that the Absolute Dry Density of product is improved;
(2)The Pb-Zn tailings powder of activation, the specific surface area of the Pb-Zn tailings powder after activation are added in the air entrained concrete of the present invention
For 348.12m2/kg~365.44m2/kg(Preferably 354.12m2/kg), can be so that solvable in slurry under the particle diameter fineness
Substance and Ca (OH)2Contact surface increase, be conducive to SiO in tailing2Diffusion or dissolving, be conducive to tobermorite and easily tie
Crystalline substance improves reaction speed, therefore generates more hydrated products, and C-S-H gels can be more preferably converted under autoclaved condition
Tobermorite, the connection in interleaved relation with each other of tobermorite crystal form fine and close network-like structure, can be more preferable under stress
Extraneous load is resisted on ground, avoids causing stress concentration, the compression strength of product is made to improve;Simultaneously as hydroxypropyl starch ether
Addition, can attract each other between the long chain of hydroxypropyl starch ether so that the intermolecular mutual entanglement of hydroxypropyl starch ether is formed
Network structure wraps up the materials such as cement so that the compression strength of product further increases;
(3)In the raw material proportioning of the air entrained concrete of the present invention, the Pb-Zn tailings powder dosage of activation is 12 ~ 14 parts by weight, at this
Increase the quantity of tobermorite under volume, staple fiber shape is become from gill shape, intersects and forms reticular structure, make system
The compression strength of product improves, and coordinates the long-chain molecule structure of hydroxypropyl starch ether, network structure is mutually entwined into, cement
Equal materials wrap up the compression strength for further improving product;Keep crystallization good if the volume of the Pb-Zn tailings powder of activation is excessively high
Good tobermorite quantity is reduced, and reticular structure becomes relative loose, the compression strength of product is caused to reduce;Therefore the present invention
The Pb-Zn tailings powder dosage of control activation is 12 ~ 14 parts by weight(Preferably 13.5 parts by weight);
(4)Why the present invention selects Pb-Zn tailings powder, rather than other kinds of mine tailing, mainly utilizes its layer structure
Feature, pass through layer structure stripping and hydrolysis product of cement(Such as needle-shaped entringite)Micro filling concrete water to a certain extent
Hole during change avoids the later stage that foaming agent is added(Aluminium powder)Excessive bubble is generated afterwards(Later stage forms stomata)Caused by
The drawbacks of intensity declines so that air entrained concrete obtained also has certain plasticity other than with light porous characteristic;
(5)Carbon fiber is also added in the air entrained concrete of the present invention, further improves its compression strength.
Specific implementation mode
Below in conjunction with specific embodiment, the present invention will be further described, but the present invention is not limited only to these embodiments.
Embodiment 1
A kind of Pb-Zn tailings powder air entrained concrete of carbon fiber-containing, is counted, raw material includes in parts by weight:30 parts of cement, raw stone
15 parts of ash, 15 parts of quartz sand, 10 parts of flyash, 6 parts of desulfurated plaster, 3 parts of aluminium powder, 0.1 part of carbon fiber, the Pb-Zn tailings powder activated
12 parts and 1 part of hydroxypropyl starch ether;The preparation method of the Pb-Zn tailings powder of the activation is:After Pb-Zn tailings powder is ground, add
Enter grinding aid, is handled using high-frequency vibration mill, amplitude 2mm, vibration frequency 13.8 times, time of vibration 8min;Lead zinc after activation
The specific surface area of mine tailing is 348.12m2/kg。
The preparation method of the Pb-Zn tailings powder air entrained concrete of carbon fiber-containing as described above, specifically includes following steps:
(1)Quick lime, quartz sand and flyash are put into ball milling 20min in ball mill, then throw the mixed material after polishing
Enter into blender;
(2)Be added in the blender cement, desulfurated plaster, activation Pb-Zn tailings powder, hydroxypropyl starch ether and water, solid-liquid ratio is
1:1, stir 50s;Then carbon fiber is added, continues to stir 30s;It is eventually adding aluminium powder, continues to stir 15s;
(3)By step(2)Obtained slurry carries out steam press maintenance, vapor (steam) temperature 187 after pouring into a mould, getting angry, stand, demould
DEG C, soaking time 7h, heating rate is 1.2 DEG C/min, pressure 1.2MPa, and the air entrained concrete is made.
Embodiment 2
A kind of Pb-Zn tailings powder air entrained concrete of carbon fiber-containing, is counted, raw material includes in parts by weight:40 parts of cement, raw stone
20 parts of ash, 20 parts of quartz sand, 15 parts of flyash, 8 parts of desulfurated plaster, 5 parts of aluminium powder, 0.3 part of carbon fiber, the Pb-Zn tailings powder activated
14 parts and 3 parts of hydroxypropyl starch ether;The preparation method of the Pb-Zn tailings powder of the activation is:After Pb-Zn tailings powder is ground, add
Enter grinding aid, is handled using high-frequency vibration mill, amplitude 5mm, vibration frequency 15.8 times, time of vibration 9min;Lead zinc after activation
The specific surface area of mine tailing is 365.44m2/kg。
The preparation method of the Pb-Zn tailings powder air entrained concrete of carbon fiber-containing as described above, specifically includes following steps:
(1)Quick lime, quartz sand and flyash are put into ball milling 20min in ball mill, then throw the mixed material after polishing
Enter into blender;
(2)Be added in the blender cement, desulfurated plaster, activation Pb-Zn tailings powder, hydroxypropyl starch ether and water, solid-liquid ratio is
1:1.5, stir 90s;Then carbon fiber is added, continues to stir 40s;It is eventually adding aluminium powder, continues to stir 30s;
(3)By step(2)Obtained slurry carries out steam press maintenance, vapor (steam) temperature 190 after pouring into a mould, getting angry, stand, demould
DEG C, soaking time 8h, heating rate is 1.5 DEG C/min, pressure 1.25MPa, and the air entrained concrete is made.
Embodiment 3
A kind of Pb-Zn tailings powder air entrained concrete of carbon fiber-containing, is counted, raw material includes in parts by weight:36 parts of cement, raw stone
18 parts of ash, 17 parts of quartz sand, 12 parts of flyash, 7 parts of desulfurated plaster, 4 parts of aluminium powder, 0.2 part of carbon fiber, the Pb-Zn tailings powder activated
13.5 parts and 2 parts of hydroxypropyl starch ether;The preparation method of the Pb-Zn tailings powder of the activation is:After Pb-Zn tailings powder is ground,
Grinding aid is added, is handled using high-frequency vibration mill, amplitude 3.5mm, vibration frequency is 14.3 times, 10 parts of time of vibration;Activation
The specific surface area of Pb-Zn tailings powder afterwards is 354.12m2/kg。
The preparation method of the Pb-Zn tailings powder air entrained concrete of carbon fiber-containing as described above, specifically includes following steps:
(1)Quick lime, quartz sand and flyash are put into ball milling 20min in ball mill, then throw the mixed material after polishing
Enter into blender;
(2)Be added in the blender cement, desulfurated plaster, activation Pb-Zn tailings powder, hydroxypropyl starch ether and water, solid-liquid ratio is
1:1.2, stir 70s;Then carbon fiber is added, continues to stir 35s;It is eventually adding aluminium powder, continues to stir 20s;
(3)By step(2)Obtained slurry carries out steam press maintenance after pouring into a mould, getting angry, stand, demould, and it is mixed that the aerating is made
Solidifying soil.
Step(3)Described in steam press maintenance during, vapor (steam) temperature be 188 DEG C, soaking time 7.5h, heating rate
For 1.3 DEG C/min, pressure 1.22MPa.
Performance test
According to national standard"Steam-pressing aero-concrete method for testing performance (GB/T11969-2008)"Measure air entrained concrete of the present invention
The Absolute Dry Density and compression strength of product.With the Absolute Dry Density of NVL-1101B type balance measurement aerated concrete products;With
YES-300 type digital display hydraulic pressure testing machines test the compression strength of aerated concrete products;According to DL/T5150-2001 water conservancy projects
Concrete test regulation tests the plasticity of aerated concrete products;The results are shown in Table 1.
The performance test results of 1 air entrained concrete of the present invention of table
As it can be seen from table 1 the present invention air entrained concrete by be added activation Pb-Zn tailings powder, hydroxypropyl starch ether and
Foaming agent is being added in carbon fiber(Aluminium powder)Aerated concrete products are made in steam press maintenance afterwards, and compression strength greatly enhances, up to
8.3 ~ 9.4MPa, but also it is provided with certain plasticity(Fracture elongation is 05 ~ 0.75%, and traditional aerated concrete products
Fracture elongation is generally 0).
The foregoing is merely presently preferred embodiments of the present invention, all equivalent changes done according to scope of the present invention patent with
Modification should all belong to the covering scope of the present invention.
Claims (4)
1. a kind of Pb-Zn tailings powder air entrained concrete of carbon fiber-containing, it is characterised in that:It counts in parts by weight, the carbon fiber-containing
The raw material of Pb-Zn tailings powder air entrained concrete include:30 ~ 40 parts of cement, 15 ~ 20 parts of quick lime, 15 ~ 20 parts of quartz sand, fine coal
10 ~ 15 parts of ash, 6 ~ 8 parts of desulfurated plaster, 3 ~ 5 parts of aluminium powder, 0.1 ~ 0.3 part of carbon fiber, 12 ~ 14 parts of the Pb-Zn tailings powder and hydroxyl activated
1 ~ 3 part of propyl starch ether;The preparation method of the Pb-Zn tailings powder of the activation is:After Pb-Zn tailings powder is ground, grinding aid is added
Agent is handled using high-frequency vibration mill, 2 ~ 5mm of amplitude, vibration frequency 13.8 ~ 15.8 times, 8 ~ 10 parts of time of vibration;Lead after activation
The specific surface area of zinc mine tailing is 348.12m2/kg~365.44m2/kg。
2. a kind of Pb-Zn tailings powder air entrained concrete of carbon fiber-containing according to claim 1, it is characterised in that:By weight
Number meter is measured, the raw material of the Pb-Zn tailings powder air entrained concrete of the carbon fiber-containing includes:36 parts of cement, 18 parts of quick lime, stone
17 parts of sand, 12 parts of flyash, 7 parts of desulfurated plaster, 4 parts of aluminium powder, 0.2 part of carbon fiber, activation 13.5 parts of Pb-Zn tailings powder and
2 parts of hydroxypropyl starch ether;The preparation method of the Pb-Zn tailings powder of the activation is:After Pb-Zn tailings powder is ground, grinding aid is added
Agent is handled using high-frequency vibration mill, amplitude 3.5mm, and vibration frequency is 14.3 times, 10 min of time of vibration;Lead after activation
The specific surface area of zinc mine tailing is 354.12m2/kg。
3. a kind of method for the Pb-Zn tailings powder air entrained concrete preparing carbon fiber-containing as claimed in claim 1 or 2, feature
It is:Specifically include following steps:
(1)Quick lime, quartz sand and flyash are put into ball milling 20min in ball mill, then throw the mixed material after polishing
Enter into blender;
(2)Be added in the blender cement, desulfurated plaster, activation Pb-Zn tailings powder, hydroxypropyl starch ether and water, solid-liquid ratio is
1:(1~1.5), stir 50 ~ 90s;Then carbon fiber is added, continues 30 ~ 40s of stirring;Be eventually adding aluminium powder, continue stirring 15 ~
30s;
(3)By step(2)Obtained slurry carries out steam press maintenance after pouring into a mould, getting angry, stand, demould, and it is mixed that the aerating is made
Solidifying soil.
4. the preparation method of the Pb-Zn tailings powder air entrained concrete of carbon fiber-containing according to claim 3, it is characterised in that:
Step(3)Described in steam press maintenance during, vapor (steam) temperature is 187 ~ 190 DEG C, and soaking time is 7 ~ 8h, and heating rate is
1.2 ~ 1.5 DEG C/min, pressure is 1.2 ~ 1.25MPa.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110616324A (en) * | 2019-04-11 | 2019-12-27 | 苏州重于山新材料科技有限公司 | Method for extracting silver from silver-containing lead-zinc tailings and utilizing waste residues of silver |
| CN112745088A (en) * | 2020-12-31 | 2021-05-04 | 河南省交通勘察设计有限公司 | Foamed light soil for widening roadbed of road system and construction method thereof |
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Application publication date: 20181023 |