CN110510967A - A kind of air entrained concrete brick of sulfur acid calcium waste residue and preparation method thereof - Google Patents
A kind of air entrained concrete brick of sulfur acid calcium waste residue and preparation method thereof Download PDFInfo
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- CN110510967A CN110510967A CN201910720772.5A CN201910720772A CN110510967A CN 110510967 A CN110510967 A CN 110510967A CN 201910720772 A CN201910720772 A CN 201910720772A CN 110510967 A CN110510967 A CN 110510967A
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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
- C04B28/10—Lime cements or magnesium oxide cements
-
- 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/02—Selection of the hardening environment
- C04B40/0231—Carbon dioxide hardening
-
- 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/02—Selection of the hardening environment
- C04B40/024—Steam hardening, e.g. in an autoclave
-
- 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
-
- 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)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Inorganic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses air entrained concrete brick of a kind of sulfur acid calcium waste residue and preparation method thereof, the raw material of concrete brick includes: cement, siliceous material, calcium sulfate waste residues, lime, aluminium powder, stabilizer, water.The preparation method of the air entrained concrete brick of sulfur acid calcium waste residue proposed by the present invention, comprising: aluminium powder is uniformly mixed to obtain aluminium powder suspension with part water；Surplus stock is added in blender and heats and stirs evenly to obtain slurry, slurry temperature is 45-50 DEG C, and stirring 0.5-1min obtains mixed slurry after aluminium powder suspension is added, and casting is placed in just feeding room, get angry pre-hardening 1.5-2h at 55-65 DEG C, obtains adobe after demoulding, cutting；Adobe is placed in carbonized maintaining in carbonization case, then moves into steam press maintenance in still kettle, be placed in hot water curing pool progress hot water maintenance, cool to room temperature.Preparation method benefit proposed by the present invention is useless, environmentally friendly, and obtained concrete brick intensity is high, and crack resistance is good, excellent durability.
Description
Technical field
The present invention relates to technical field of concrete, and in particular to a kind of the air entrained concrete brick and its system of sulfur acid calcium waste residue
Preparation Method.
Background technique
Air entrained concrete is to be with siliceous material (sand, flyash and containing silicon tailings etc.) and calcareous material (lime, cement)
Primary raw material adds foaming agent (aluminium powder), passes through the technical process systems such as ingredient, stirring, casting, precuring, cutting, steam pressure, maintenance
At light porous silicate product, have many advantages, such as it is light, fire prevention, heat preservation, sound-insulating and heat-insulating；However, existing aerating is mixed
Solidifying soil adds itself distinctive porous structure since there is some shortcomings for its composition material and production technology, easily make plus
Gas concrete haves the defects that shrinking percentage is big, compression strength is low, is also easy to produce cracking, limits its application.
In current construction industry, the useless energy conservation of benefit, protection environment increasingly become focus concerned by people, however activity is white
A large amount of calcium sulfate waste residues can be generated during native neutralisation treatment, are not applied well at present, processing pressure is still larger.
Summary of the invention
In order to solve the technical problems in background technology, it is mixed that the invention proposes a kind of aeratings of sulfur acid calcium waste residue
Solidifying cob brick and preparation method thereof, the preparation method benefit is useless, environmentally friendly, and obtained concrete brick intensity is high, and crack resistance is good, durability
It can excellent, long service life.
A kind of air entrained concrete brick of sulfur acid calcium waste residue proposed by the present invention, raw material includes: cement by weight
210-270 parts, 480-620 parts of siliceous material, 320-470 parts of calcium sulfate waste residues, 350-390 parts of lime, 1.6-1.75 parts of aluminium powder,
0.45-0.5 parts of stabilizer, 1150-1280 parts of water；Wherein, the siliceous material is one of flyash, sand or two kinds
Mixture.
Preferably, raw material further includes the water-reducing agent of 10-17 parts by weight, the potassium sulfate of 0.4-0.7 parts by weight, 3.8-4.7
The EPS granular polystyrene of parts by weight, the nanometer calcium carbonate slurry that 13-28 parts by weight solid content is 50wt%.
Preferably, the water-reducing agent is mixed 3-5h by poly carboxylic acid series water reducer and white carbon black at 45-55 DEG C and obtains；
The EPS granular polystyrene is circular granular, and diameter≤4.7mm, density 4.4-5kg/m3。
Preferably, the cement is 42.5 ordinary portland cements；The calcium sulfate waste residues are atlapulgite neutralisation treatment
The calcium sulfate waste residues of generation；The lime is white lime.
Preferably, the stabilizer is oleic acid, triethanolamine, calgon, calcium stearate, Tea Saponin, carboxymethyl fibre
Tie up the mixture of one or more of element.
Preferably, the stabilizer is the mixture of oleic acid, triethanolamine, Tea Saponin, and oleic acid, triethanolamine, tea soap
The weight ratio of element is 3-5:1:4-9.
Preferably, the flyash is calcium oxide content >=20wt% high-calcium fly ass；The sand be it is levigate after stone
The mixture of one or more of sand, river sand, sea sand, average grain diameter 0.15-0.3mm, and maximum particle diameter≤
0.5mm。
A kind of preparation method of the air entrained concrete brick for sulfur acid calcium waste residue that the present invention also proposes, including following step
It is rapid:
S1, aluminium powder is uniformly mixed to obtain aluminium powder suspension with part water；
S2, surplus stock is added in blender and heats and is uniformly mixing to obtain slurry, wherein the temperature of slurry is 45-
50 DEG C, be added aluminium powder suspension after continue stir 0.5-1min obtain mixed slurry；
S3, mixed slurry is poured into mold, is subsequently placed in just feeding room and carries out initial set of getting angry, after demoulding, cutting
To adobe, wherein pre-hardening temperature of getting angry is 55-65 DEG C, and the presetting period of getting angry is 1.5-2 hours；
S4, adobe be placed in carbonization case carry out carbonized maintaining, then move into and carry out steam press maintenance in still kettle, postposition
Hot water maintenance is carried out in hot water curing pool, obtains the air entrained concrete brick of the sulfur acid calcium waste residue after cooling to room temperature.
Preferably, during carbonized maintaining, carbonization gas is carbon dioxide, carbonization time 30-85min, carbonization temperature
Degree is 55-70 DEG C.
Preferably, the detailed process of steam press maintenance are as follows: it is passed through steam progress after vacuumizing and once boosts to 0.8-0.9MPa,
Heat-insulation pressure keeping 1.5-2h under conditions of 0.8-0.9MPa and 170-180 DEG C, then carries out secondary booster to 1.1-1.3MPa,
Heat-insulation pressure keeping 0.9-1.5h under conditions of 1.1-1.3MPa and 185-190 DEG C, then 1.5MPa is boosted to three times, In
Heat-insulation pressure keeping conserves 2-3.5h under conditions of 1.5MPa and 200 DEG C, is depressurized to normal pressure；Wherein, the time once boosted is 50-
70min；The time of secondary booster is 30-55min；The time boosted three times is 40-60min, and the time for being depressurized to normal pressure is 50-
90min。
Preferably, in hot water maintenance processes, including one section of hot water maintenance and two sections of hot water maintenances, what one section of hot water conserved
Temperature is 30-45 DEG C, time 50-120min, and the temperature of two sections of hot water maintenance is 55-70 DEG C, time 2-3.5h.
The air entrained concrete brick of sulfur acid calcium waste residue of the present invention in raw material, is added to calcium sulfate waste residues instead of portion
Divide siliceous material, calcium sulfate waste residues are a kind of waste material, and being added in concrete brick can turn waste into wealth, and are atlapulgite neutralisation treatment
The a large amount of calcium sulfate waste residues generated in the process are found suitably using approach, have been saved cost, have been reduced pollution；It mixes simultaneously
The water-reducing agent of certain content, potassium sulfate, EPS granular polystyrene and solid content are the nanometer calcium carbonate slurry of 50wt%, wherein institute
It states water-reducing agent and is mixed at a certain temperature by poly carboxylic acid series water reducer with white carbon black and obtained, poly carboxylic acid series water reducer molecular band
There is carboxyl, white carbon black surface has considerable activity hydroxy, and the two can occur esterification, the two is combined as a whole, and one
Aspect, so that the steric hindrance of poly carboxylic acid series water reducer increases, is made cement granules be difficult to reunite, released due to the addition of white carbon black
More Free waters are released, the mobility of system is improved, on the other hand, white carbon black surface has obtained modification, in system
Good dispersion, can slow release, secondary hydration can occur with hydrolysis product of cement calcium hydroxide, improve gained concrete brick
Mechanical property and durability；The nanometer calcium carbonate slurry of incorporation can make main hydrated product tobermorite crystallization situation good
Good, overall structure is closely knit, improves the compression strength and dry shrinkage of brick；The EPS granular polystyrene of incorporation can replace system simultaneously
In portion void, further improve the compression strength of concrete brick, reduce the shrinking percentage of material；The flyash is specific
It is selected as calcium oxide content >=20wt% high-calcium fly ass, while suitably increasing the content of lime, solves flyash peace
The problem of qualitative difference；The potassium sulfate of addition can further enhance the intensity of concrete brick；Tea Saponin is a kind of of good performance
Natural nonionic surfactant reduces the stabilizer that it cooperates according to a specific ratio with oleic acid, triethanolamine
It is poured the surface tension of slurry, the wetability of solid is changed, forms bubble protection film, improves the stabilization of slurry casting
Property, improve the air hole structure of air entrained concrete, improves the physical and mechanical property of air entrained concrete；In the sulfur acid calcium waste residue
In the preparation method of air entrained concrete brick, adobe is successively carried out to carbonized maintaining, steam press maintenance and hot water maintenance, and control
The technological parameter of maintenance, cooperates three, has refined inside concrete pore size, reduces in concrete shared by harmful hole
Ratio keeps the intensity of gained concrete high, overcomes the low defect of simple steam press maintenance later strength, it is excellent to assign concrete brick
Different durability.
The air entrained concrete brick of sulfur acid calcium waste residue of the present invention by selecting suitable raw material, and adjusts each raw material
Proportion, so that each raw material is played synergistic effect and carry out production air entrained concrete brick, gained concrete brick intensity is high, dry shrinks
Small, crack resistance and durability are good, while finding suitably for calcium sulfate waste residues using approach, energy-saving and environmental protection.
Specific embodiment
In the following, technical solution of the present invention is described in detail by specific embodiment.
Embodiment 1
A kind of air entrained concrete brick of sulfur acid calcium waste residue, raw material include: 210 parts of cement, flyash 620 by weight
Part, 320 parts of calcium sulfate waste residues, 370 parts of lime, 1.6 parts of aluminium powder, 0.5 part of stabilizer, 1230 parts of water.
A kind of preparation method of the air entrained concrete brick for sulfur acid calcium waste residue that the present invention also proposes, including following step
It is rapid:
S1, aluminium powder is uniformly mixed to obtain aluminium powder suspension with part water；
S2, surplus stock is added in blender and heats and is uniformly mixing to obtain slurry, wherein the temperature of slurry is 50
DEG C, continue stirring 1min after addition aluminium powder suspension and obtains mixed slurry；
S3, mixed slurry is poured into mold, is subsequently placed in just feeding room and carries out initial set of getting angry, after demoulding, cutting
To adobe, wherein pre-hardening temperature of getting angry is 55 DEG C, and the presetting period of getting angry is 1.5 hours；
S4, adobe be placed in carbonization case carry out carbonized maintaining, then move into and carry out steam press maintenance in still kettle, postposition
Hot water maintenance is carried out in hot water curing pool, obtains the air entrained concrete brick of the sulfur acid calcium waste residue after cooling to room temperature.
Embodiment 2
A kind of air entrained concrete brick of sulfur acid calcium waste residue, raw material include: 42.5 ordinary portland cements by weight
270 parts, 600 parts of sand, 470 parts of calcium sulfate waste residues, 390 parts of white lime, 1.7 parts of aluminium powder, 0.45 part of calcium stearate, 1280 parts of water,
17 parts of water-reducing agent, 0.4 part of potassium sulfate, 4.7 parts of EPS granular polystyrene, 13 parts of nanometer calcium carbonate slurry that solid content is 50wt%；
Wherein, the water-reducing agent is mixed 5h by poly carboxylic acid series water reducer and white carbon black at 45 DEG C and obtains, and poly- carboxylic
The weight ratio of sour based water reducer and white carbon black is 3:11；The EPS granular polystyrene is circular granular, and diameter≤4.7mm, density
For 4.4kg/m3；The calcium sulfate waste residues are the calcium sulfate waste residues that atlapulgite neutralisation treatment generates；After the sand is levigate
Quartz sand, average grain diameter 0.15mm, and maximum particle diameter are 0.5mm.
A kind of preparation method of the air entrained concrete brick for sulfur acid calcium waste residue that the present invention also proposes, including following step
It is rapid:
S1, aluminium powder is uniformly mixed to obtain aluminium powder suspension with part water；
S2, surplus stock is added in blender and heats and is uniformly mixing to obtain slurry, wherein the temperature of slurry is 45
DEG C, continue stirring 0.7min after addition aluminium powder suspension and obtains mixed slurry；
S3, mixed slurry is poured into mold, is subsequently placed in just feeding room and carries out initial set of getting angry, after demoulding, cutting
To adobe, wherein pre-hardening temperature of getting angry is 65 DEG C, and the presetting period of getting angry is 1.7 hours；
S4, adobe be placed in carbonization case carry out carbonized maintaining, then move into and carry out steam press maintenance in still kettle, postposition
Hot water maintenance is carried out in hot water curing pool, obtains the air entrained concrete brick of the sulfur acid calcium waste residue after cooling to room temperature；Its
In, during carbonized maintaining, carbonization gas is carbon dioxide, and carbonization time 85min, carburizing temperature is 55 DEG C；Steam pressure is supported
The detailed process of shield are as follows: be passed through steam progress after vacuumizing and once boost to 0.9MPa, under conditions of 0.9MPa and 180 DEG C
Heat-insulation pressure keeping 1.5h, then progress secondary booster is to 1.3MPa, heat-insulation pressure keeping 0.9h under conditions of 1.3MPa and 190 DEG C,
Boosted to 1.5MPa three times again, heat-insulation pressure keeping conserves 3.5h under conditions of 1.5MPa and 200 DEG C, is depressurized to normal pressure；
Wherein, the time once boosted is 50min；The time of secondary booster is 55min；The time boosted three times is 40min, is depressurized to
The time of normal pressure is 90min；In hot water maintenance processes, including one section of hot water maintenance and two sections of hot water maintenances, one section of hot water are supported
The temperature of shield is 30 DEG C, time 120min, and the temperature of two sections of hot water maintenance is 55 DEG C, time 3.5h.
Embodiment 3
A kind of air entrained concrete brick of sulfur acid calcium waste residue, raw material include: 42.5 ordinary portland cements by weight
240 parts, 300 parts of flyash, 180 parts of sand, 380 parts of calcium sulfate waste residues, 350 parts of white lime, 1.75 parts of aluminium powder, stabilizer 0.47
Part, the nano-calcium carbonate that 1150 parts of water, 10 parts of water-reducing agent, 0.7 part of potassium sulfate, 3.8 parts of EPS granular polystyrene, solid content are 50wt%
28 parts of calcium slurry；
Wherein, the water-reducing agent is mixed 3h by poly carboxylic acid series water reducer and white carbon black at 55 DEG C and obtains；The EPS
Granular polystyrene is circular granular, and diameter≤4.7mm, density 5kg/m3；
The calcium sulfate waste residues are the calcium sulfate waste residues that atlapulgite neutralisation treatment generates；
The stabilizer is the mixture of oleic acid, triethanolamine, Tea Saponin, and the weight of oleic acid, triethanolamine, Tea Saponin
Than for 3:1:9；
The flyash is the high-calcium fly ass that calcium oxide content is 20wt%；The sand be it is levigate after quartz sand, sea
The mixture of sand, and the weight ratio of quartz sand, sea sand is 1:1, average grain diameter 0.15mm, and maximum particle diameter is 0.4mm.
A kind of preparation method of the air entrained concrete brick for sulfur acid calcium waste residue that the present invention also proposes, including following step
It is rapid:
S1, aluminium powder is uniformly mixed to obtain aluminium powder suspension with part water；
S2, surplus stock is added in blender and heats and is uniformly mixing to obtain slurry, wherein the temperature of slurry is 47
DEG C, continue stirring 0.5min after addition aluminium powder suspension and obtains mixed slurry；
S3, mixed slurry is poured into mold, is subsequently placed in just feeding room and carries out initial set of getting angry, after demoulding, cutting
To adobe, wherein pre-hardening temperature of getting angry is 60 DEG C, and the presetting period of getting angry is 2 hours；
S4, adobe be placed in carbonization case carry out carbonized maintaining, then move into and carry out steam press maintenance in still kettle, postposition
Hot water maintenance is carried out in hot water curing pool, obtains the air entrained concrete brick of the sulfur acid calcium waste residue after cooling to room temperature；
Wherein, during carbonized maintaining, carbonization gas is carbon dioxide, carbonization time 30min, carburizing temperature 70
℃；
The detailed process of steam press maintenance are as follows: be passed through after vacuumizing steam progress once boost to 0.8MPa, 0.8MPa with
And heat-insulation pressure keeping 2h under conditions of 170 DEG C, secondary booster is then carried out to 1.1MPa, under conditions of 1.1MPa and 185 DEG C
Heat-insulation pressure keeping 1.5h, then 1.5MPa is boosted to three times, heat-insulation pressure keeping conserves 2h under conditions of 1.5MPa and 200 DEG C,
It is depressurized to normal pressure；Wherein, the time once boosted is 70min；The time of secondary booster is 30min；The time boosted three times is
60min, the time for being depressurized to normal pressure is 50min；
In hot water maintenance processes, including one section of hot water maintenance and two sections of hot water maintenances, the temperature of one section of hot water maintenance are
45 DEG C, time 500min, the temperature of two sections of hot water maintenance is 70 DEG C, time 2h.
Embodiment 4
A kind of air entrained concrete brick of sulfur acid calcium waste residue, raw material include: 42.5 ordinary portland cements by weight
250 parts, 300 parts of flyash, 250 parts of sand, 430 parts of calcium sulfate waste residues, 375 parts of white lime, 1.68 parts of aluminium powder, stabilizer 0.47
Part, the nanometer calcium carbonate that 1200 parts of water, 12 parts of water-reducing agent, 0.6 part of potassium sulfate, 4 parts of EPS granular polystyrene, solid content are 50wt%
21 parts of slurry；
Wherein, the water-reducing agent is mixed 4h by poly carboxylic acid series water reducer and white carbon black at 48 DEG C and obtains, and poly- carboxylic
The weight ratio of sour based water reducer and white carbon black is 2:13；The EPS granular polystyrene is circular granular, and diameter≤4.7mm, density
For 4.7kg/m3；
The calcium sulfate waste residues are the calcium sulfate waste residues that atlapulgite neutralisation treatment generates；
The stabilizer is the mixture of oleic acid, triethanolamine, Tea Saponin, and the weight of oleic acid, triethanolamine, Tea Saponin
Than for 5:1:4；
The flyash is the high-calcium fly ass that calcium oxide content is 20wt%；The sand be it is levigate after quartz sand, river
The mixture of sand, sea sand, and the weight ratio of quartz sand, river sand, sea sand be 1:2:1, average grain diameter 0.3mm, and maximum grain
Diameter is 0.5mm.
A kind of preparation method of the air entrained concrete brick for sulfur acid calcium waste residue that the present invention also proposes, including following step
It is rapid:
S1, aluminium powder is uniformly mixed to obtain aluminium powder suspension with part water；
S2, surplus stock is added in blender and heats and is uniformly mixing to obtain slurry, wherein the temperature of slurry is 48
DEG C, continue stirring 0.7min after addition aluminium powder suspension and obtains mixed slurry；
S3, mixed slurry is poured into mold, is subsequently placed in just feeding room and carries out initial set of getting angry, after demoulding, cutting
To adobe, wherein pre-hardening temperature of getting angry is 62 DEG C, and the presetting period of getting angry is 1.7 hours；
S4, adobe be placed in carbonization case carry out carbonized maintaining, then move into and carry out steam press maintenance in still kettle, postposition
Hot water maintenance is carried out in hot water curing pool, obtains the air entrained concrete brick of the sulfur acid calcium waste residue after cooling to room temperature；
During carbonized maintaining, carbonization gas is carbon dioxide, and carbonization time 60min, carburizing temperature is 68 DEG C；
The detailed process of steam press maintenance are as follows: be passed through steam progress after vacuumizing and once boost to 0.85MPa, in 0.85MPa
And heat-insulation pressure keeping 1.7h under conditions of 175 DEG C, secondary booster is then carried out to 1.2MPa, in 1.2MPa and 188 DEG C of item
Heat-insulation pressure keeping 1h under part, then 1.5MPa is boosted to three times, heat-insulation pressure keeping conserves under conditions of 1.5MPa and 200 DEG C
2.5h is depressurized to normal pressure；Wherein, the time once boosted is 60min；The time of secondary booster is 40min；Boost three times when
Between be 50min, be depressurized to normal pressure time be 55min；
In hot water maintenance processes, including one section of hot water maintenance and two sections of hot water maintenances, the temperature of one section of hot water maintenance are
38 DEG C, time 70min, the temperature of two sections of hot water maintenance is 60 DEG C, time 2.8h.
Comparative example 1
With being uniquely different only in that for embodiment 4: in its raw material, flyash is 730 parts, and is free of calcium sulfate waste residues.
Comparative example 2
With being uniquely different only in that for embodiment 4: in its raw material, without containing water-reducing agent, potassium sulfate, EPS granular polystyrene, consolidating
Content is the nanometer calcium carbonate slurry of 50wt%.
Comparative example 3
With being uniquely different only in that for embodiment 4: in preparation method, in S4, adobe being placed in carbonization case and is carried out
Carbonized maintaining then moves into and carries out steam press maintenance in still kettle, obtains air entrained concrete brick after cooling to room temperature.
According to the standard of GB/T 11969-2008, to the performance of gained concrete brick in embodiment 4 and comparative example 1-3
It is detected, as a result as shown in the table:
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of air entrained concrete brick of sulfur acid calcium waste residue, which is characterized in that its raw material includes: cement 210- by weight
270 parts, 480-620 parts of siliceous material, 320-470 parts of calcium sulfate waste residues, 350-390 parts of lime, 1.6-1.75 parts of aluminium powder, stabilization
0.45-0.5 parts of agent, 1150-1280 parts of water；Wherein, the siliceous material is one of flyash, sand or two kinds of mixing
Object.
2. the air entrained concrete brick of sulfur acid calcium waste residue according to claim 1, which is characterized in that its raw material further includes 10-
The water-reducing agent of 17 parts by weight, the potassium sulfate of 0.4-0.7 parts by weight, the EPS granular polystyrene of 3.8-4.7 parts by weight, 13-28 parts by weight
Solid content is the nanometer calcium carbonate slurry of 50wt%.
3. the air entrained concrete brick of sulfur acid calcium waste residue according to claim 2, which is characterized in that the water-reducing agent is by poly- carboxylic
3-5h is mixed at 45-55 DEG C and obtains for sour based water reducer and white carbon black；The EPS granular polystyrene is circular granular, and straight
Diameter≤4.7mm, density 4.4-5kg/m3。
4. the air entrained concrete brick of sulfur acid calcium waste residue described in any one of -3 according to claim 1, which is characterized in that the water
Mud is 42.5 ordinary portland cements；The calcium sulfate waste residues are the calcium sulfate waste residues that atlapulgite neutralisation treatment generates；It is described
Lime is white lime.
5. the air entrained concrete brick of sulfur acid calcium waste residue described in any one of -3 according to claim 1, which is characterized in that described steady
Determining agent is one or more of oleic acid, triethanolamine, calgon, calcium stearate, Tea Saponin, carboxymethyl cellulose
Mixture；Preferably, the stabilizer is the mixture of oleic acid, triethanolamine, Tea Saponin, and oleic acid, triethanolamine, Tea Saponin
Weight ratio be 3-5:1:4-9.
6. the air entrained concrete brick of sulfur acid calcium waste residue described in any one of -3 according to claim 1, which is characterized in that the powder
Coal ash is calcium oxide content >=20wt% high-calcium fly ass；The sand be it is levigate after quartz sand, river sand, one of sea sand
Or a variety of mixtures, average grain diameter 0.15-0.3mm, and maximum particle diameter≤0.5mm.
7. a kind of preparation method of the air entrained concrete brick of the sulfur acid calcium waste residue as described in any one of claim 1-6, special
Sign is, comprising the following steps:
S1, aluminium powder is uniformly mixed to obtain aluminium powder suspension with part water；
S2, surplus stock being added in blender and heats and is uniformly mixing to obtain slurry, wherein the temperature of slurry is 45-50 DEG C,
Continue stirring 0.5-1min after addition aluminium powder suspension and obtains mixed slurry；
S3, mixed slurry is poured into mold, is subsequently placed in just feeding room and carries out initial set of getting angry, obtains brick after demoulding, cutting
Base, wherein pre-hardening temperature of getting angry is 55-65 DEG C, and the presetting period of getting angry is 1.5-2 hours；
S4, adobe be placed in carbonization case carry out carbonized maintaining, then move into and carry out steam press maintenance in still kettle, be placed on heat
Hot water maintenance is carried out in water curing pond, obtains the air entrained concrete brick of the sulfur acid calcium waste residue after cooling to room temperature.
8. the preparation method of the air entrained concrete brick of sulfur acid calcium waste residue according to claim 7, which is characterized in that be carbonized
In maintenance processes, carbonization gas is carbon dioxide, and carbonization time 30-85min, carburizing temperature is 55-70 DEG C.
9. according to the preparation method of the air entrained concrete brick of the sulfur acid calcium waste residue of claim 7 or 8, which is characterized in that steam
Press the detailed process of maintenance are as follows: be passed through steam progress after vacuumizing and once boost to 0.8-0.9MPa, in 0.8-0.9MPa and
Heat-insulation pressure keeping 1.5-2h under conditions of 170-180 DEG C, then carries out secondary booster to 1.1-1.3MPa, in 1.1-1.3MPa and
Heat-insulation pressure keeping 0.9-1.5h under conditions of 185-190 DEG C, then 1.5MPa is boosted to three times, at 1.5MPa and 200 DEG C
Under the conditions of heat-insulation pressure keeping conserve 2-3.5h, be depressurized to normal pressure；Wherein, the time once boosted is 50-70min；Secondary booster
Time is 30-55min；The time boosted three times is 40-60min, and the time for being depressurized to normal pressure is 50-90min.
10. according to the preparation method of the air entrained concrete brick of the sulfur acid calcium waste residue of claim 7 or 8, which is characterized in that In
In hot water maintenance processes, including one section of hot water maintenance and two sections of hot water maintenances, the temperature of one section of hot water maintenance are 30-45 DEG C, when
Between be 50-120min, two sections of hot water maintenance temperature be 55-70 DEG C, time 2-3.5h.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111268985A (en) * | 2020-01-15 | 2020-06-12 | 浙江富春江环保热电股份有限公司 | Autoclaved aerated concrete block and preparation process thereof |
| CN114956634A (en) * | 2022-05-30 | 2022-08-30 | 湖北工业大学 | Preparation method of high-strength internal curing carbonized brick |
-
2019
- 2019-08-06 CN CN201910720772.5A patent/CN110510967A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111268985A (en) * | 2020-01-15 | 2020-06-12 | 浙江富春江环保热电股份有限公司 | Autoclaved aerated concrete block and preparation process thereof |
| CN114956634A (en) * | 2022-05-30 | 2022-08-30 | 湖北工业大学 | Preparation method of high-strength internal curing carbonized brick |
| CN114956634B (en) * | 2022-05-30 | 2023-09-12 | 湖北工业大学 | Preparation method of high-strength internal curing carbonized bricks |
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