CN110498652A - The modified iron tailings composite foam thermal insulation material and preparation method thereof of aeroge - Google Patents
The modified iron tailings composite foam thermal insulation material and preparation method thereof of aeroge Download PDFInfo
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- CN110498652A CN110498652A CN201910896869.1A CN201910896869A CN110498652A CN 110498652 A CN110498652 A CN 110498652A CN 201910896869 A CN201910896869 A CN 201910896869A CN 110498652 A CN110498652 A CN 110498652A
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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
- C04B28/04—Portland cements
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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
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
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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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- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention provides a kind of modified iron tailings composite foam thermal insulation materials and preparation method thereof of aeroge.In parts by weight, iron tailings composite foam thermal insulation material of the invention is made by carrying out foaming including the following raw material: 10~50 parts of iron tailings, 15~65 parts of flyash, 1~20 part of miberal powder, 30~60 parts of cementitious materials, 0.001~0.1 part of water-reducing agent, 0.1~2.5 part of accelerator, 0.05~2.5 portion of foam stabilizer, 0.05~2 part of polypropylene fibre and 0.1~1.5 part of aeroge.The mineral composite foamed thermal insulation material that can be used for building heat preservation has been made using industrial solid castoffs such as iron tailings, flyash, miberal powders by the present invention, and material cost can be greatly lowered.
Description
Technical field
The present invention relates to inorganic heat insulation material technical fields, multiple more particularly, to a kind of modified iron tailings of aeroge
Close cellular insulant and preparation method thereof.
Background technique
Because chemical component and physicochemical property are similar to construction material, there is good compatibility with cementitious materials such as cement, closely
Over a little years, industrial solid castoff such as flyash, desulfurized gypsum, miberal powder etc. is applied to building neck by more and more researchers
Domain prepares cellular insulant by industrial solid castoff.But cellular insulant used by most researchers
It is all that a large amount of ordinary portland cements and sulphate aluminium cement, most of cost are added mostly based on the raw materials such as cement, sand
It is higher.
Iron tailings is used as artificial sand to substitute natural sand concrete batching through screening, can dissolve a large amount of iron tailings, so as to
To solve the problems, such as iron tailings land occupation, welding.But because the activity of iron tailings is not excited effectively, so as to cause obtaining
Material mechanical property is undesirable etc. that reasons cause the practical efficiency of iron tailings very low.
Summary of the invention
The first object of the present invention is to provide a kind of iron tailings composite foam thermal insulation material that aeroge is modified.The present invention
Satisfactory foam thermal insulation building materials are prepared using Industrial Solid Wastes such as iron tailings, flyash, miberal powders, and material can be greatly lowered
Expect cost.
In parts by weight, the modified iron tailings composite foam thermal insulation material of aeroge provided by the invention is by including following former
Material carry out foaming be made: 10~50 parts of iron tailings, 15~65 parts of flyash, 1~20 part of miberal powder, 30~60 parts of cementitious materials,
0.001~0.1 part of water-reducing agent, 0.1~2.5 part of accelerator, 0.05~2.5 portion of foam stabilizer, 0.05~2 part of polypropylene fibre and
0.1~1.5 part of aeroge.
In a preferred embodiment of the invention, aeroge is aerosil.Wherein, aerosil
Thermal coefficient be preferably 0.03~0.05W/ (mK).
Wherein, iron tailings is iron tailings powder, the content of the silica of iron tailings in the present invention is preferably 38%~
45%, the content of magnesia is preferably 20~25%.
Wherein, in this field, miberal powder is steel-making miberal powder, and preferably calcium oxide content is 35~40%, and silica content is
30~35%, the miberal powder that alumina content is 10~16%.
In a preferred embodiment of the invention, cementitious material is portland cement, further preferably industrial
PO42.5 ordinary portland cement.
In a preferred embodiment of the invention, water-reducing agent is polycarboxylate water-reducer or naphthalene water reducer, is preferably gathered
Carboxylic acid water reducer, further preferably KS-JS50 type polycarboxylate water-reducer.
In a preferred embodiment of the invention, accelerator is 8880-A type accelerator.
In a preferred embodiment of the invention, foam stabilizer is calcium stearate.
In a preferred embodiment of the invention, the average length of polypropylene fibre is 2~3mm.
In a preferred embodiment of the invention, in parts by weight, the raw material includes: 15~40 parts of iron tailings, 20
~35 parts of flyash, 8~15 parts of miberal powders, 40~50 parts of cementitious materials, 0.01~0.02 part of water-reducing agent, 1~2 part of accelerator, 0.5
~1 portion of foam stabilizer, 0.1~0.8 part of polypropylene fibre and 0.3~0.6 part of aeroge.
In a preferred embodiment of the invention, in above scheme, iron tailings, flyash, miberal powder and cementitious material
The sum of parts by weight are 100 parts by weight.
In the present invention, parts by weight can be the unit of weight well known in the art such as μ g, mg, g, kg, be also possible to it again
Number, such as 1/10,1/100,10 times, 100 times.
In a preferred embodiment of the invention, in parts by weight, the raw material further include 0.05~2 part of rubber powder and
0.1~2 part of EPS particle (polystyrene foam particles)；Preferably include 0.4~1 part of rubber powder and 1.5~2 parts of EPS particles.
Wherein, rubber powder is building instant dissolving glue powder.
Wherein, the dry density of EPS particle is 10~25kg/m3, radius be 2~10mm, thermal coefficient be 0.035~
0.06W/ (mK), hydrophobic rate are greater than 90%.Preferably, the dry density of EPS particle is 12~17kg/m3, radius be 3~
5mm, thermal coefficient are 0.045W/ (mK), and hydrophobic rate is greater than 95%.
In a preferred embodiment of the invention, in parts by weight, the modified iron tailings of aeroge provided by the invention
Composite foam thermal insulation material by include the following raw material carry out foaming be made: 15~40 parts of iron tailings, 20~35 parts of flyash, 8~
15 parts of miberal powders, 40~50 parts of cementitious materials, 0.01~0.02 part of water-reducing agent, 1~2 part of accelerator, 0.5~1 part of foam stabilizer, 0.1
~0.8 part of polypropylene fibre, 0.3~0.6 part of aeroge, 0.4~1 part of rubber powder and 1.5~2 parts of EPS particles.Wherein, iron tailings,
The sum of parts by weight of flyash, miberal powder and cementitious material are 100 parts by weight.
In a preferred embodiment of the invention, foam to carry out physical blowing using physical blowing agent；The physics
Foaming agent is preferably YS-903 type foaming agent.Physical blowing agent can be used into 1:(20~60) it is diluted with water, after being sufficiently stirred
Foam is obtained using foaming machine.In the present invention, it is preferred to which obtaining foam density is 60~70kg/m3Foam.
In the present invention, water is also added thereto when above-mentioned raw materials being prepared into raw material.The modified iron tail of above-mentioned aeroge
The preparation method of mine composite foam thermal insulation material include by raw material in addition to water in proportion with account for solid principal goods material total weight 40~
90% water (preferably 60~70%) is uniformly mixed, the foam after foaming is added, natural curing after molding.
Another object of the present invention is to provide the preparations of the modified iron tailings composite foam thermal insulation material of above-mentioned aeroge
Method, the preparation method include the following steps: for raw material to be uniformly mixed with water in proportion, thereto be added foam density 60~
70kg/m3Foam, enter mould after mixing evenly, form green body in mold, demould, natural curing.
Wherein, the foam of addition accounts for 20~30wt% of the siccative total amount of slurry, preferably 25~30wt%.
Wherein, the dosage of water accounts for main solid material (iron tailings+flyash+miberal powder+common 42.5 silicate cement in raw material
Mud) total weight 40~90%.
The performance indicator of the modified iron tailings composite foam thermal insulation material of above-mentioned aeroge reaches professional standard " JG/T
266-2011 foam concrete " requirement, can be used for preparing building thermal insulation material.I.e. another object of the present invention is to provide
The modified iron tailings composite foam thermal insulation material of above-mentioned aeroge or above-mentioned preparation method are preparing answering in building thermal insulation material
With.
The mine that can be used for building heat preservation has been made using industrial solid castoffs such as iron tailings, flyash, miberal powders by the present invention
Object composite foam thermal insulation material, can be greatly lowered material cost.The modified iron tailings of the aeroge that the present invention obtains is compound
Cellular insulant dry density is low, and thermal coefficient is low, and performance indicator reaches professional standard " JG/T 266-2011 foam coagulation
Soil " requirement, building field can be applied to.The composite foam thermal insulation material that the present invention obtains is with good stability and ring
Border close friend's performance.
Specific embodiment
With reference to embodiment, the embodiment of the present invention is furthur described in detail.Following embodiment is used for
Illustrate the present invention, but is not intended to limit the scope of the invention.
Unless otherwise specified, the conventional means that technological means used is well known to those skilled in the art in embodiment, institute
It is commercial goods with raw material.Rubber powder is commercially available building instant dissolving glue powder.
Wherein, the specification of part material and purchase producer are as shown in table 1 below:
The specification of 1 part material of table and purchase producer
Iron tailings used in embodiment is Hebei Laiyuan iron tailings, using X-ray fluorescence spectra (XRF) to iron tailings sample
Product carry out quantitative analysis, as a result as shown in table 2 below:
2 iron tailings oxide components content of table
By XRF analysis it is found that the main chemical compositions of the Laiyuan iron tailings are SiO2And MgO, wherein SiO2Content is
39.46%, content of MgO 23.4%.
Flyash used in embodiment is level-one flyash, has the production of limit company by four Tonghua, Henan Province, is penetrated using X
Line fluorescence spectrum (XRF) carries out quantitative analysis to flyash sample, as shown in table 3 below:
3 flyash oxide components content of table
Miberal powder used in embodiment is S95 grades of miberal powders, is produced by Tangshan Tanglong Novel Building Materials Co., Ltd., and table 4 is should
The oxide of miberal powder forms:
4 miberal powder oxide components content of table
EPS particle used in embodiment is the production of Langfang in Hebei Province Huifeng thermal insulation material Co., Ltd, and dry density is
12~17kg/m3, radius is 3~5mm, and thermal coefficient is 0.045W/ (mK), and hydrophobic rate is greater than 95%.
SiO used in embodiment2Aeroge is produced by Hebei Dacheng County Sheng Ke thermal insulation material Co., Ltd, thermally conductive
Coefficient is 0.036W/ (mK).
Embodiment 1
A kind of iron tailings composite foam thermal insulation material that aeroge is modified is present embodiments provided, preparation method includes as follows
Step:
1) pretreatment of raw material, mixing: following raw materials are mixed by mass percentage: iron tailings 20%, flyash 25%,
Miberal powder 10%, common 42.5 portland cement, 45% and 0.01% polycarboxylate water-reducer, 1% accelerator, 0.5% foam stabilizer,
0.6% polypropylene fibre, 0.4% rubber powder, 1.6%EPS particle and 0.3%SiO2Aeroge；Suitable quantity of water is added, water accounts for main solid
The 70% of material total weight (iron tailings+flyash+miberal powder+common 42.5 portland cement), and mixing it is uniform after mixed
Object；Foaming agent used is physical blowing agent, is diluted with water by dilution ratio for 1:40, is prepared and is steeped with foaming machine after being sufficiently stirred
Foam, made foam density are 64.74kg/m3, foam is poured into container and is weighed, (foam accounts for slurry with slurry by a certain percentage
The 28wt% of middle siccative total amount) mixing, 2min is stirred, is sufficiently mixed foam with slurry.
2) forming processes: step 1), which will be obtained mixture, to be poured into mold, and preservative film is covered.There is some strength to test block
Afterwards, it is demoulded using the Portable air compressor for being equipped with demoulding rifle, carries out natural curing 28d at room temperature, it is modified to obtain aeroge
Iron tailings composite foam thermal insulation material.
3) performance test: the dry density of the iron tailings composite foam thermal insulation material modified to obtained aeroge, pressure resistance
Degree and thermal coefficient are tested and are analyzed.
Dry density test: according to JC/T2125-2012 " the heat-insulated survey with foam concrete dry apparent density of roof heat insulation
Examination " regulation carry out.Every group takes 3 blocks of cellular insulants prepared, 1 hour dry at (105 ± 5) DEG C.Use balance
Test block mass M t is weighed, test specimen side length is measured and calculates volume V.Dry density calculation method is shown in formula (1-1).
ρ=Mt/V × 106 (1-1)
ρ in formula --- thermal insulation material dry density (kg/m3)；
V --- thermal insulation material volume (mm3)；
Mt --- thermal insulation material quality (g).
Intensity test: every group takes 3 blocks of cellular insulants prepared, 1 hour dry at (105 ± 5) DEG C.
Measurement test specimen side length simultaneously calculates forced area S, using electronic universal tester, with the loading velocity of 5mm/min, until test block is broken
It is bad.Maximum load capacity F0 is recorded to obtain by computer.Calculation formula is shown in formula (1-2).
P=F0/S (1-2)
P in formula --- thermal insulation material compression strength (MPa)；
F0 --- thermal insulation material maximum load capacity (N)；
S --- thermal insulation material forced area (mm2)。
Determination of conductive coefficients: every group takes 3 blocks of cellular insulants prepared, 1 hour dry at (105 ± 5) DEG C.
Every piece of test block is cut along median perpendicular, the detector of heat conduction coefficient tester is sandwiched inside test block, starts to carry out thermal balance
Detection starts heat conducting coefficient measuring after the hot detection curve of material reaches balance.Test method in the present invention is above-mentioned
Test method no longer repeats one by one.
Measuring 1 material dry density of embodiment is 205.2kg/m3, compression strength 0.25MPa, thermal coefficient 0.057W/
(m·K)。
Embodiment 2
A kind of iron tailings composite foam thermal insulation material that aeroge is modified is present embodiments provided, preparation method includes as follows
Step:
1) pretreatment of raw material, mixing: following raw materials are mixed by mass percentage: iron tailings 15%, flyash 20%,
Miberal powder 15%, common 42.5 portland cement, 50% and 0.02% polycarboxylate water-reducer, 2% accelerator, 1% foam stabilizer,
0.8% polypropylene fibre, 1% rubber powder, 2%EPS particle and 0.6%SiO2Aeroge；Suitable quantity of water is added, water accounts for main solid material
The 60% of total weight (iron tailings+flyash+miberal powder+common 42.5 portland cement), and mixing it is uniform after obtain mixture；Institute
It is physical blowing agent with foaming agent, is diluted with water by dilution ratio for 1:40, prepares foam with foaming machine after being sufficiently stirred, institute
Foam density processed is 64.74kg/m3, foam is poured into container and is weighed, mixes that (foam accounts in slurry with slurry by a certain percentage
The 28wt% of siccative total amount), 2min is stirred, is sufficiently mixed foam with slurry.
2) forming processes: step 1), which will be obtained mixture, to be poured into mold, and preservative film is covered.There is some strength to test block
Afterwards, it is demoulded using the Portable air compressor for being equipped with demoulding rifle, carries out natural curing 28d at room temperature, it is modified to obtain aeroge
Iron tailings composite foam thermal insulation material.
3) performance test: the dry density of the iron tailings composite foam thermal insulation material modified to obtained aeroge, pressure resistance
Degree and thermal coefficient are tested and are analyzed.Measuring material dry density is 235.1kg/m3, compression strength 0.21MPa is thermally conductive
Coefficient is 0.069W/ (mK).
Embodiment 3
A kind of iron tailings composite foam thermal insulation material that aeroge is modified is present embodiments provided, preparation method includes as follows
Step:
1) pretreatment of raw material, mixing: following raw materials are mixed by mass percentage: iron tailings 30%, flyash 20%,
Miberal powder 8%, common 42.5 portland cement, 42% and 0.02% polycarboxylate water-reducer, 1% accelerator, 0.5% foam stabilizer,
0.1% polypropylene fibre, 1% rubber powder, 1.5%EPS particle and 0.3%SiO2Aeroge；Suitable quantity of water is added, water accounts for main solids
Expect total weight (iron tailings+flyash+miberal powder+common 42.5 portland cement) 60%, and mixing it is uniform after obtain mixture；
Foaming agent used is physical blowing agent, is diluted with water by dilution ratio for 1:40, prepares foam with foaming machine after being sufficiently stirred,
Made foam density is 64.74kg/m3, foam is poured into container and is weighed, mixes that (foam accounts for slurry with slurry by a certain percentage
The 28wt% of middle siccative total amount), 2min is stirred, is sufficiently mixed foam with slurry.
2) forming processes: step 1), which will be obtained mixture, to be poured into mold, and preservative film is covered.There is some strength to test block
Afterwards, it is demoulded using the Portable air compressor for being equipped with demoulding rifle, carries out natural curing 28d at room temperature, it is modified to obtain aeroge
Iron tailings composite foam thermal insulation material.
3) performance test: the dry density of the iron tailings composite foam thermal insulation material modified to obtained aeroge, pressure resistance
Degree and thermal coefficient are tested and are analyzed.Measure material dry density 217.8kg/m3, compression strength 0.23MPa, thermally conductive system
Number is 0.059W/ (mK).
Embodiment 4
A kind of iron tailings composite foam thermal insulation material that aeroge is modified is present embodiments provided, preparation method includes as follows
Step:
1) pretreatment of raw material, mixing: following raw materials are mixed by mass percentage: iron tailings 10%, flyash 55%,
Miberal powder 5%, common 42.5 portland cement, 30% and 0.001% polycarboxylate water-reducer, 0.1% accelerator, 0.05% foam stabilizing
Agent, 0.05% polypropylene fibre, 0.05% rubber powder, 0.1%EPS particle and 0.1%SiO2Aeroge；Suitable quantity of water is added, water accounts for
The 70% of main solid material total weight (iron tailings+flyash+miberal powder+common 42.5 portland cement), and mixing it is uniform after
To mixture；Foaming agent used is physical blowing agent, is diluted with water by dilution ratio for 1:40, uses foaming machine after being sufficiently stirred
Foam is prepared, made foam density is 64.74kg/m3, foam is poured into container and is weighed, is mixed by a certain percentage with slurry
(28wt% that foam accounts for siccative total amount in slurry) stirs 2min, is sufficiently mixed foam with slurry.
2) forming processes: step 1), which will be obtained mixture, to be poured into mold, and preservative film is covered.There is some strength to test block
Afterwards, it is demoulded using the Portable air compressor for being equipped with demoulding rifle, carries out natural curing 28d at room temperature, it is modified to obtain aeroge
Iron tailings composite foam thermal insulation material.
3) performance test: the dry density of the iron tailings composite foam thermal insulation material modified to obtained aeroge, pressure resistance
Degree and thermal coefficient are tested and are analyzed.Measuring material dry density is 247.1kg/m3, compression strength 0.29MPa is thermally conductive
Coefficient is 0.071W/ (mK).
Embodiment 5
A kind of iron tailings composite foam thermal insulation material that aeroge is modified is present embodiments provided, preparation method includes as follows
Step:
1) pretreatment of raw material, mixing: following raw materials are mixed by mass percentage: iron tailings 45%, flyash 15%,
Miberal powder 5%, common 42.5 portland cement, 35% and 0.1% polycarboxylate water-reducer, 2.5% accelerator, 2.5% foam stabilizer,
2% polypropylene fibre, 2% rubber powder, 2%EPS particle and 1.5%SiO2Aeroge；Suitable quantity of water is added, it is total that water accounts for main solid material
The 70% of weight (iron tailings+flyash+miberal powder+common 42.5 portland cement), and mixing it is uniform after obtain mixture；It is used
Foaming agent is physical blowing agent, is diluted with water by dilution ratio for 1:40, prepares foam with foaming machine after being sufficiently stirred, made
Foam density is 64.74kg/m3, foam is poured into container and is weighed, mixed by a certain percentage with slurry (foam account in slurry do
Expect the 28wt% of total amount), 2min is stirred, is sufficiently mixed foam with slurry.
2) forming processes: step 1), which will be obtained mixture, to be poured into mold, and preservative film is covered.There is some strength to test block
Afterwards, it is demoulded using the Portable air compressor for being equipped with demoulding rifle, carries out natural curing 28d at room temperature, it is modified to obtain aeroge
Iron tailings composite foam thermal insulation material.
3) performance test: the dry density of the iron tailings composite foam thermal insulation material modified to obtained aeroge, pressure resistance
Degree and thermal coefficient are tested and are analyzed.Measuring material dry density is 377.1kg/m3, compression strength 0.04MPa is thermally conductive
Coefficient is 0.085W/ (mK).
Embodiment 6
A kind of iron tailings composite foam thermal insulation material that aeroge is modified is present embodiments provided, preparation method includes as follows
Step:
1) pretreatment of raw material, mixing: following raw materials are mixed by mass percentage: iron tailings 20%, flyash 25%,
Miberal powder 10%, common 42.5 portland cement, 45% and 0.01% polycarboxylate water-reducer, 2% accelerator, 1% foam stabilizer,
0.4% polypropylene fibre and 0.6%SiO2Aeroge；Suitable quantity of water is added, water accounts for main solid material total weight (iron tailings+fine coal
Ash+miberal powder+common 42.5 portland cement) 60%, and mixing it is uniform after obtain mixture；Foaming agent used is physical blowing
Agent is diluted with water by dilution ratio for 1:40, prepares foam with foaming machine after being sufficiently stirred, and made foam density is
64.74kg/m3, foam is poured into container and is weighed, mixes that (foam accounts for siccative total amount in slurry with slurry by a certain percentage
28wt%), 2min is stirred, is sufficiently mixed foam with slurry.
2) forming processes: step 1), which will be obtained mixture, to be poured into mold, and preservative film is covered.There is some strength to test block
Afterwards, it is demoulded using the Portable air compressor for being equipped with demoulding rifle, carries out natural curing 28d at room temperature, it is modified to obtain aeroge
Iron tailings composite foam thermal insulation material.
3) performance test: the dry density of the iron tailings composite foam thermal insulation material modified to obtained aeroge, pressure resistance
Degree and thermal coefficient are tested and are analyzed.Measuring material dry density is 249.7kg/m3, compression strength 0.34MPa is thermally conductive
Coefficient is 0.072W/ (mK).
Comparative example 1
This comparative example provides a kind of iron tailings composite foam thermal insulation material, and preparation method includes the following steps:
1) pretreatment of raw material, mixing: following raw materials are mixed by mass percentage: iron tailings 60%, common 42.5 silicon
Acid salt cement 40% and 0.01% polycarboxylate water-reducer, 2% accelerator, 1% foam stabilizer and 0.4% polypropylene fibre；It is added
Suitable quantity of water, water account for the 60% of main solid material total weight (iron tailings+common 42.5 portland cement), and mixing it is uniform after obtain
Mixture；Foaming agent used is physical blowing agent, is diluted with water by dilution ratio for 1:40, with foaming machine system after being sufficiently stirred
Standby foam, made foam density are 64.74kg/m3, foam is poured into container and is weighed, mixes (bubble with slurry by a certain percentage
Foam accounts for the 28wt% of siccative total amount in slurry), 2min is stirred, is sufficiently mixed foam with slurry.
2) forming processes: step 1), which will be obtained mixture, to be poured into mold, and preservative film is covered.There is some strength to test block
Afterwards, it is demoulded using the Portable air compressor for being equipped with demoulding rifle, carries out natural curing 28d at room temperature, it is compound to obtain iron tailings
Cellular insulant.
3) performance test: to dry density, compression strength and the thermal coefficient of obtained iron tailings composite foam thermal insulation material
It is tested and is analyzed.Measuring material dry density is 507.9kg/m3, compression strength 0.14MPa, thermal coefficient 0.156W/
(m·K)。
Comparative example 2
This comparative example provides a kind of iron tailings composite foam thermal insulation material, and preparation method includes the following steps:
1) pretreatment of raw material, mixing: following raw materials are mixed by mass percentage: iron tailings 20%, flyash 55%,
Common 42.5 portland cement, 25% and 0.01% polycarboxylate water-reducer, 2% accelerator, 1% foam stabilizer and 0.4% poly- third
Alkene fiber；Suitable quantity of water is added, water accounts for the 60% of main solid material total weight (iron tailings+common 42.5 portland cement), and mixes
Mixture is obtained after material is uniform；Foaming agent used is physical blowing agent, is diluted with water by dilution ratio for 1:40, after being sufficiently stirred
Foam is prepared with foaming machine, made foam density is 64.74kg/m3, foam is poured into container and is weighed, by a certain percentage with
Slurry mixes (28wt% that foam accounts for siccative total amount in slurry), stirs 2min, is sufficiently mixed foam with slurry.
2) forming processes: step 1), which will be obtained mixture, to be poured into mold, and preservative film is covered.There is some strength to test block
Afterwards, it is demoulded using the Portable air compressor for being equipped with demoulding rifle, carries out natural curing 28d at room temperature, it is compound to obtain iron tailings
Cellular insulant.
3) performance test: to dry density, compression strength and the thermal coefficient of obtained iron tailings composite foam thermal insulation material
It is tested and is analyzed.Measuring material dry density is 358.2kg/m3, compression strength 0.11MPa, thermal coefficient 0.118W/
(m·K)。
Finally, method of the invention is only preferable embodiment, it is not intended to limit the scope of the present invention.It is all
Within the spirit and principles in the present invention, any modification, equivalent replacement, improvement and so on should be included in protection of the invention
Within the scope of.
Claims (10)
1. a kind of modified iron tailings composite foam thermal insulation material of aeroge, which is characterized in that in parts by weight, by including as follows
Raw material carry out foaming be made: 10~50 parts of iron tailings, 15~65 parts of flyash, 1~20 part of miberal powder, 30~60 parts of cementitious materials,
0.001~0.1 part of water-reducing agent, 0.1~2.5 part of accelerator, 0.05~2.5 portion of foam stabilizer, 0.05~2 part of polypropylene fibre and
0.1~1.5 part of aeroge.
2. iron tailings composite foam thermal insulation material according to claim 1, which is characterized in that the aeroge is titanium dioxide
Silica aerogel.
3. iron tailings composite foam thermal insulation material according to claim 1 or 2, which is characterized in that in parts by weight, described
Raw material include: 15~40 parts of iron tailings, 20~35 parts of flyash, 8~15 parts of miberal powders, 40~50 parts of cementitious materials, 0.01~
0.02 part of water-reducing agent, 1~2 part of accelerator, 0.5~1 portion of foam stabilizer, 0.1~0.8 part of polypropylene fibre and 0.3~0.6 part of airsetting
Glue.
4. iron tailings composite foam thermal insulation material according to any one of claim 1 to 3, which is characterized in that the glue
Gel material is portland cement；
And/or the water-reducing agent is polycarboxylate water-reducer or naphthalene water reducer, preferably polycarboxylate water-reducer.
5. iron tailings composite foam thermal insulation material according to any one of claim 1 to 4, which is characterized in that the speed
Solidifying agent is 8880-A type accelerator；
And/or the average length of the polypropylene fibre is 2~3mm.
6. iron tailings composite foam thermal insulation material according to any one of claim 1 to 5, which is characterized in that the iron
The sum of tailing, flyash, miberal powder and parts by weight of cementitious material are 100 parts by weight.
7. iron tailings composite foam thermal insulation material according to any one of claim 1 to 6, which is characterized in that with weight
Part meter, the raw material further includes 0.05~2 part of rubber powder and 0.1~2 part of EPS particle；Preferably include 0.4~1 part of rubber powder and 1.5~
2 parts of EPS particles.
8. iron tailings composite foam thermal insulation material according to any one of claim 1 to 7, which is characterized in that the hair
Bubble is that physical blowing agent is used to carry out physical blowing；The physical blowing agent is preferably YS-903 type foaming agent.
9. the preparation method of iron tailings composite foam thermal insulation material described in any item of the claim 1 to 8, which is characterized in that
Include the following steps: for raw material to be uniformly mixed with water in proportion, 60~70kg/m of foam density is added thereto3Foam, stir
Enter mould after mixing uniformly, form green body in mold, demoulds, natural curing.
10. iron tailings composite foam thermal insulation material described in any item of the claim 1 to 8 is in preparing building thermal insulation material
Using.
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| CN114605097A (en) * | 2022-03-26 | 2022-06-10 | 中建西部建设北方有限公司 | Micro-nano bubble water tailing concrete and preparation method thereof |
| CN115536317A (en) * | 2022-10-31 | 2022-12-30 | 湖南省城乡环境建设有限公司 | Fly ash-gold tailing-aerogel-based composite thermal insulation material and preparation method thereof |
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