CN108911614A - A method of air entrained concrete is prepared with modified quicklime-gangue and iron tailings - Google Patents
A method of air entrained concrete is prepared with modified quicklime-gangue and iron tailings Download PDFInfo
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- CN108911614A CN108911614A CN201810674119.5A CN201810674119A CN108911614A CN 108911614 A CN108911614 A CN 108911614A CN 201810674119 A CN201810674119 A CN 201810674119A CN 108911614 A CN108911614 A CN 108911614A
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- parts
- gangue
- iron tailings
- modified
- air entrained
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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
- C04B28/02—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 hydraulic cements other than calcium sulfates
-
- 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
- C04B20/10—Coating or impregnating
- C04B20/1051—Organo-metallic compounds; Organo-silicon compounds, e.g. bentone
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a kind of methods for preparing air entrained concrete with modified quicklime-gangue and iron tailings, and sodium hydroxide, modified quicklime are uniformly mixed, and warm water mixing are added, lye is made；Pretreated gangue and iron tailings are uniformly mixed with flyash, floating bead, expanded perlite, cement, desulfurized gypsum, naphthalene water reducer, warm water is then added and is mixed, obtains cement slurry；Lye obtained is poured into cement slurry and is mixed, uniform concrete grout is obtained, adds the stirring of aluminium powder cream, after mixture is poured, get angry, it is quiet stop conserving, progress saturated vapour pressure steam press maintenance is put into still kettle after demoulding, obtains aerated concrete products.Quick lime is modified by adding silicone oil, adds silicone oil, the oxidation rate of quick lime is slack-off, plays the effect for inhibiting quick lime resolution, can effectively extend oxidation rate, and do not reduce release heat.
Description
Technical field
The invention belongs to concrete fields, and in particular to a kind of to prepare aerating with modified quicklime-gangue and iron tailings
The method of concrete.
Background technique
It is China that clay solid brick is replaced with the mankind to the pay attention to day by day of environmental protection, Development of Novel building materials and with it
The development trend of building material industry.Air entrained concrete is can to meet walling innovation and energy conservation simultaneously so far
50% desired unique single material wall.Energy conservation, heat preservation, environmental protection, processing and in terms of be much better than it is current wide
The general hollow brick and building-block used, development prospect are very wide.
Air entrained concrete also known as concrete of getting angry.It is to use calcareous material（Cement, lime etc.）, material
（Flyash, quartz sand, mine tailing, granulated blast-furnace slag, shale etc.）With foaming agent as raw material,
Add water and other additives, process is levigate, ingredient, stirring, be poured, get angry, cutting and the processes such as steam press maintenance production and
At.There is air entrained concrete low thermal conductivity, low bulk density, higher frost resistance and easy processing the excellent performances such as to use,
Northern Part of China is widely used.The especially production of powder ash air-entrained concrete,
Power plant's waste material flyash is efficiently utilized, tool heat preservation energy-saving construction material with broad prospects for development is become.
Summary of the invention
The purpose of the present invention is being directed to existing problem, a kind of modified quicklime-gangue and iron tailings system are provided
The method of standby air entrained concrete, the air entrained concrete according to this method preparation have good bending and compressive strength, water absorption rate low,
With low thermal conductivity, low bulk density.
The present invention is achieved by the following technical solutions：
A method of air entrained concrete is prepared with modified quicklime-gangue and iron tailings, which is characterized in that including walking as follows
Suddenly：
（1）2-3 parts of sodium hydroxides, modified quicklimes are uniformly mixed, 1- is mixed in 50-60 DEG C of the warm water that half is added
Lye is made in 2min；
（2）By pretreated gangue and iron tailings and 10-14 parts of flyash, 6-8 parts of floating beads, 5-7 parts of expanded perlites, 6-
10 parts of cement, 3-5 parts of desulfurized gypsums, 0.1-0.2 parts of naphthalene water reducers are uniformly mixed, and 50-60 DEG C of remaining half is then added
Warm water be mixed 1-2min, obtain cement slurry；
（3）Lye obtained is poured into, 1-2min is mixed in cement slurry, obtained uniform concrete grout, add 0.04-
0.06 part of aluminium powder cream stirs 40-60s, after mixture is poured, get angry at 53-57 DEG C, it is quiet stop conserving 2-3h, be put into after demoulding
Saturated vapour pressure steam press maintenance is carried out in still kettle, obtains aerated concrete products.
Further, step（1）Middle that the 20-25 parts of quick quick limes of high calcium are carried out grinding with flour mill, when grinding, adds
0.006-0.008 parts of Methyl Hydrogen Polysiloxane Fluids, obtain modified quicklime.
Further, step（2）It is middle to be crushed to 15-20 parts of gangues<After 2mm, drying and processing is carried out to moisture content<
1%, with ball mill grinding, 170-200 mesh is crossed, calcining and activating 3-4h is carried out in 590-610 DEG C of Muffle furnace, water quenching cooling is extremely
Room temperature obtains pretreatment gangue；
Ball mill grinding is used after 30-40 parts of iron tailings are dried, and is crossed 170-200 mesh, is obtained pretreatment iron tailings.
Further, step（1）（2）Middle water additional amount is the 0.4-0.5 of the total dosage of siccative.
Further, step（3）Middle steam press maintenance condition is:Heat up 183-187 DEG C of 1-2h, constant temperature constant pressure 1-2MPa guarantor
7-8h is held, cool down 1-2h.
The present invention has the following advantages that compared with prior art：
（1）Quick lime is modified by adding silicone oil, adds silicone oil, the oxidation rate of quick lime is slack-off, plays inhibition
The effect of quick lime resolution, can effectively extend oxidation rate, and do not reduce release heat；Silicone oil portion envelops in ball milling give birth to stone
Gray surface is formed on its surface hydrophobic film, and water-repellent layer barrier quick lime is reacted with water, but as time went on, part is not wrapped
The lime water metaplasia wrapped up in is at OH-Afterwards, water-repellent layer just gradually decomposes, and releases quick lime, does not influence its calcareous and heat release.
（2）Gangue is passed through into high-temperature calcination activating pretreatment, the gangue by calcining is due to obtaining energy from the external world
And its chemical bond Si-O, Al-O are opened, lattice is distorted, and crystal structure destroys, and generates stronger glue to excite
Solidifying activity；Iron tailings is subjected to ball milling pretreatment, reduces iron tailings feed particles granularity by mechanical grinding, specific surface area increases
Greatly, surface free energy increases, and reactivity enhances therewith；Expanded perlite and floating bead is used to replace part fine coal by light filler
Ash carries out the preparation of air entrained concrete.
Specific embodiment
Embodiment 1
A method of air entrained concrete is prepared with modified quicklime-gangue and iron tailings, which is characterized in that including walking as follows
Suddenly：
（1）2 parts of sodium hydroxides, modified quicklimes are uniformly mixed, 1min is mixed in 50-60 DEG C of the warm water that half is added,
Lye is made；
（2）By pretreated gangue and iron tailings and 10 parts of flyash, 6 parts of floating beads, 5 parts of expanded perlites, 6 parts of cement, 3
Part desulfurized gypsum, 0.1 part of naphthalene water reducer are uniformly mixed, and 50-60 DEG C of the warm water that remaining half is then added is mixed
1min obtains cement slurry；
（3）Lye obtained is poured into, 1min is mixed in cement slurry, obtain uniform concrete grout, adds 0.04 part of aluminium powder
Cream stir 40s, after mixture is poured, get angry at 53-57 DEG C, it is quiet stop conserve 2h, be put into still kettle and satisfy after demoulding
With steam pressure steam press maintenance, aerated concrete products are obtained.
Further, step（1）Middle that 20 parts of quick quick limes of high calcium are carried out grinding with flour mill, when grinding, adds
0.006 part of Methyl Hydrogen Polysiloxane Fluid, obtains modified quicklime.
Further, step（2）It is middle to be crushed to 15 parts of gangues<After 2mm, drying and processing is carried out to moisture content<1%, it uses
Ball mill grinding crosses 170 meshes, and calcining and activating 3h is carried out in 590-610 DEG C of Muffle furnace, and water quenching cooling to room temperature obtains pre-
Handle gangue；
Ball mill grinding is used after 30 parts of iron tailings are dried, and is crossed 170 meshes, is obtained pretreatment iron tailings.
Further, step（1）（2）Middle water additional amount is the 0.4 of the total dosage of siccative.
Further, step（3）Middle steam press maintenance condition is:Heat up 183-187 DEG C of 1h, constant temperature constant pressure 1MPa holding 7h,
Cool down 1h.
Embodiment 2
A method of air entrained concrete is prepared with modified quicklime-gangue and iron tailings, which is characterized in that including walking as follows
Suddenly：
（1）3 parts of sodium hydroxides, modified quicklimes are uniformly mixed, 2min is mixed in 50-60 DEG C of the warm water that half is added,
Lye is made；
（2）By pretreated gangue and iron tailings and 14 parts of flyash, 8 parts of floating beads, 7 parts of expanded perlites, 10 parts of cement,
5 parts of desulfurized gypsums, 0.2 part of naphthalene water reducer are uniformly mixed, and 50-60 DEG C of the warm water that remaining half is then added is mixed
2min obtains cement slurry；
（3）Lye obtained is poured into, 2min is mixed in cement slurry, obtain uniform concrete grout, adds 0.06 part of aluminium powder
Cream stir 60s, after mixture is poured, get angry at 53-57 DEG C, it is quiet stop conserve 3h, be put into still kettle and satisfy after demoulding
With steam pressure steam press maintenance, aerated concrete products are obtained.
Further, step（1）Middle that 25 parts of quick quick limes of high calcium are carried out grinding with flour mill, when grinding, adds
0.008 part of Methyl Hydrogen Polysiloxane Fluid, obtains modified quicklime.
Further, step（2）It is middle to be crushed to 20 parts of gangues<After 2mm, drying and processing is carried out to moisture content<1%, it uses
Ball mill grinding crosses 200 meshes, and calcining and activating 4h is carried out in 590-610 DEG C of Muffle furnace, and water quenching cooling to room temperature obtains pre-
Handle gangue；
Ball mill grinding is used after 40 parts of iron tailings are dried, and is crossed 200 meshes, is obtained pretreatment iron tailings.
Further, step（1）（2）Middle water additional amount is the 0.5 of the total dosage of siccative.
Further, step（3）Middle steam press maintenance condition is:Heat up 183-187 DEG C of 2h, constant temperature constant pressure 2MPa holding 8h,
Cool down 2h.
Comparative example 1
This comparative example 1 compared with Example 1, in step（1）In unused Methyl Hydrogen Polysiloxane Fluid to quick lime carry out powder change
Property processing, method and step in addition to this is all the same.
Comparative example 2
This comparative example 2 compared with Example 2, in step（2）In gangue, iron tailings are not pre-processed, in addition to this
Method and step it is all the same.
Control group
Application No. is：A kind of highway cement pitch concrete disclosed in 201711459424.
In order to compare the performance of air entrained concrete produced by the present invention, to above-described embodiment 1, embodiment 2, comparative example
1, comparative example 2 prepare air entrained concrete and control group bituminous concrete, be tested for the property, test method according to
Sighting target standard carries out：
As can be seen from the above table, unused Methyl Hydrogen Polysiloxane Fluid carries out powder modification processing to quick lime in comparative example 1,
Gangue, iron tailings are not pre-processed in comparative example 2, lead to the degradation of air entrained concrete；By present invention side
The air entrained concrete of method preparation, have good bending and compressive strength, water absorption rate it is low, with low thermal conductivity, low bulk density,
Higher frost resistance and easy processing such as use at the excellent performances.
Claims (5)
1. a kind of method for preparing air entrained concrete with modified quicklime-gangue and iron tailings, which is characterized in that including as follows
Step：
（1）2-3 parts of sodium hydroxides, modified quicklimes are uniformly mixed, 1- is mixed in 50-60 DEG C of the warm water that half is added
Lye is made in 2min；
（2）By pretreated gangue and iron tailings and 10-14 parts of flyash, 6-8 parts of floating beads, 5-7 parts of expanded perlites, 6-
10 parts of cement, 3-5 parts of desulfurized gypsums, 0.1-0.2 parts of naphthalene water reducers are uniformly mixed, and 50-60 DEG C of remaining half is then added
Warm water be mixed 1-2min, obtain cement slurry；
（3）Lye obtained is poured into, 1-2min is mixed in cement slurry, obtained uniform concrete grout, add 0.04-
0.06 part of aluminium powder cream stirs 40-60s, after mixture is poured, get angry at 53-57 DEG C, it is quiet stop conserving 2-3h, be put into after demoulding
Saturated vapour pressure steam press maintenance is carried out in still kettle, obtains aerated concrete products.
2. a kind of method for preparing air entrained concrete with modified quicklime-gangue and iron tailings according to claim 1,
It is characterized in that, step（1）Middle that the 20-25 parts of quick quick limes of high calcium are carried out grinding with flour mill, when grinding, adds 0.006-
0.008 part of Methyl Hydrogen Polysiloxane Fluid, obtains modified quicklime.
3. a kind of method for preparing air entrained concrete with modified quicklime-gangue and iron tailings according to claim 1,
It is characterized in that, step（2）It is middle to be crushed to 15-20 parts of gangues<After 2mm, drying and processing is carried out to moisture content<1%, use ball
Grinding machine grinding crosses 170-200 mesh, and calcining and activating 3-4h is carried out in 590-610 DEG C of Muffle furnace, and water quenching cooling to room temperature obtains
To pretreatment gangue；
Ball mill grinding is used after 30-40 parts of iron tailings are dried, and is crossed 170-200 mesh, is obtained pretreatment iron tailings.
4. a kind of method for preparing air entrained concrete with modified quicklime-gangue and iron tailings according to claim 1,
It is characterized in that, step（1）（2）Middle water additional amount is the 0.4-0.5 of the total dosage of siccative.
5. a kind of method for preparing air entrained concrete with modified quicklime-gangue and iron tailings according to claim 1,
It is characterized in that, step（3）Middle steam press maintenance condition is:Heat up 183-187 DEG C of 1-2h, constant temperature constant pressure 1-2MPa holding 7-8h,
Cool down 1-2h.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810674119.5A CN108911614A (en) | 2018-06-27 | 2018-06-27 | A method of air entrained concrete is prepared with modified quicklime-gangue and iron tailings |
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| CN201810674119.5A CN108911614A (en) | 2018-06-27 | 2018-06-27 | A method of air entrained concrete is prepared with modified quicklime-gangue and iron tailings |
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| CN108911614A true CN108911614A (en) | 2018-11-30 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112960962A (en) * | 2021-03-19 | 2021-06-15 | 河北充填采矿技术有限公司 | Non-cement-based water-grouting inorganic cementing material and preparation method and application thereof |
| CN114276112A (en) * | 2022-01-24 | 2022-04-05 | 江苏宇山红建材科技有限公司 | Preparation method of autoclaved aerated concrete block |
| CN114409366A (en) * | 2021-12-24 | 2022-04-29 | 苏州良浦天路新型建材有限公司 | Aerated concrete plate beneficial to recycling and preparation method thereof |
| CN117985967A (en) * | 2024-02-05 | 2024-05-07 | 河南理工大学 | Magnesium tailing admixture and preparation method and application thereof |
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| CN104876627A (en) * | 2014-09-22 | 2015-09-02 | 河北工程大学 | Method for preparing aerated concrete from gangue and iron tailings |
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2018
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104876627A (en) * | 2014-09-22 | 2015-09-02 | 河北工程大学 | Method for preparing aerated concrete from gangue and iron tailings |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112960962A (en) * | 2021-03-19 | 2021-06-15 | 河北充填采矿技术有限公司 | Non-cement-based water-grouting inorganic cementing material and preparation method and application thereof |
| CN114409366A (en) * | 2021-12-24 | 2022-04-29 | 苏州良浦天路新型建材有限公司 | Aerated concrete plate beneficial to recycling and preparation method thereof |
| CN114276112A (en) * | 2022-01-24 | 2022-04-05 | 江苏宇山红建材科技有限公司 | Preparation method of autoclaved aerated concrete block |
| CN117985967A (en) * | 2024-02-05 | 2024-05-07 | 河南理工大学 | Magnesium tailing admixture and preparation method and application thereof |
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Application publication date: 20181130 |