CN107129172A - A kind of preparation method of gunite concrete fine mineral admixture - Google Patents
A kind of preparation method of gunite concrete fine mineral admixture Download PDFInfo
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- CN107129172A CN107129172A CN201710337134.6A CN201710337134A CN107129172A CN 107129172 A CN107129172 A CN 107129172A CN 201710337134 A CN201710337134 A CN 201710337134A CN 107129172 A CN107129172 A CN 107129172A
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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
- 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
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
- C04B40/0042—Powdery mixtures
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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
- C04B20/023—Chemical treatment
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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
- C04B20/04—Heat treatment
-
- 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
-
- 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
-
- 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
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
-
- 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)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a kind of preparation method of gunite concrete fine mineral admixture, belong to concrete additives preparing technical field.Converter slag is tentatively improved its specific surface area through grinding by the present invention first, again with methane liquid mixed fermentation, the weak acid environment dissolving produced using fermentation removes acid soluble impurities, and further improves its specific surface area, and organic matter is removed through calcining after, flyash is removed to remaining charcoal through calcining again, and under the conditions of ultrasonic-microwave, with acid treatment, remove part acid soluble metal oxide, mixed after filtering drying with calcining steel-making slag powder, and coordinate multiple ball milling through steam curing.The present invention handles industrial waste converter slag and flyash respectively, its active ingredient is set to purify, in steam curing and mechanical milling process, reaction rate and fluidity of slurry energy of the product in course of hardening are improved, effectively keeps concrete initial stage and later strength to continue to increase.
Description
Technical field
The invention discloses a kind of preparation method of gunite concrete fine mineral admixture, belong to concrete additives technology of preparing neck
Domain.
Background technology
Gunite concrete is mainly used after silicate series cement, hydrated cementitious, and the main hydration products of generation are aquation
The particle diameter of calcium silicates, calcium hydroxide, drated calcium aluminate, hydrated calcium ferrite, hydrated calcium aluminate sulfate etc., wherein hydrated calcium silicate is 10
~100nm, equivalent to colloidal substance, often claims C-S-H gels, accounts for more than the 50% of hydrated product, and the intensity of gunite concrete rises
Key effect be C-S-H gels quantity, various mineralogical compositions do not have complete aquation in cement during 28 days ages, cement
Practical efficiency is only 60~70%, and quite a few cement only plays filling effect, therefore too high cement consumption is helpless to carry
High concrete intensity, or even later strength can be damaged, because cement consumption is excessive, wherein the calcium oxide of unhydrated part, later stage
Meet and calcium hydroxide is generated after water, volumetric expansion produces internal stress, so that intensity is reduced, accordingly, it is considered to be mixed in gunite concrete
Some miscellaneous active materials, to promote the conversion of hydrolysis product of cement, improve the intensity of gunite concrete, while adulterating, some meet water
The material of stickiness is easily presented afterwards, helps to reduce rebound degree.
At present, all it is much industrial residue and waste material using more fine mineral admixture, for example：Flyash, blast-furnace cinder, gypsum
Deng replacing part of cement production gunite concrete using these waste residues and waste material, can both reduce the pollution that cement is caused, and might be used again
So that these waste residues and waste material to be utilized effectively, reduce their pollutions to environment.However, due to mineral waste self performance
Unstable, kind is varied, and the effect of the mechanism of action and generation to concrete is also different, causes to configure coagulation at present
Native spike is also rested on convenient and economic base, and the gunite concrete performance produced is unstable, limits fine mineral admixture and exists
Promoting the use of in concrete.Therefore, how to improve the self stability of mineral waste strengthen concrete concrete it is steady
Qualitative is urgent problem to be solved in the industry.
The content of the invention
The present invention solves the technical problem of：Directly used without processing for conventional spray concrete spike,
Causing the problem of gunite concrete performance of production is unstable, there is provided a kind of preparation method of gunite concrete fine mineral admixture.
In order to solve the above-mentioned technical problem, the technical solution adopted in the present invention is：
（1）300~500g converter slags are weighed, 500~800 mesh sieves are crossed after crushing, steel-making slag powder are obtained, and gained steel-making slag powder is transferred to
In the fermentation tank for filling 3~5L biogas slurries, constant-temperature enclosed fermentation is filtered, and is dried, is obtained dry fermenting steel slag powder filter cake, then by drying
Fermenting steel slag powder filter cake is transferred to Muffle furnace, and 650~700 DEG C are warming up to 10~15 DEG C/min rate programs, and insulation calcining 45~
60min, cools to room temperature with the furnace, discharging, must activate porous calcining steel-making slag powder；
（2）Weigh 400~500g flyash, be placed in Muffle furnace, in temperature be 450~500 DEG C under the conditions of calcining 30~
45min, room temperature to be cooled to the furnace, it is 10~15% that the flyash after calcining, which is poured into, and fills 1800~2000mL mass fractions
In the beaker of sulfuric acid, then by beaker move into ultrasound microwave chemical reactor in, in supersonic frequency be 35~40kHz, microwave power
Under the conditions of 600~800W, 60~90min is reacted, question response terminates, filtered, washed, dried, obtain dry removal of impurities flyash filter
Slag；
（3）Count by weight, 40~60 parts of porous calcining steel-making slag powders of activation are sequentially added in batch mixer, 80~100 parts are done
Dry removal of impurities flyash filter residue, in temperature be 55~60 DEG C, rotating speed be 600~800r/min under the conditions of, constant temperature stirring mixing 2~
3h, obtains mixed material；
（4）Mixed material is transferred to steam curing box, under the conditions of temperature is 95~100 DEG C, steam curing 5~7 days, in maintenance
Period, mixed material in steam curing box is removed every 12~16h, it is mixed with 160~200r/min rotating speeds ball milling through ball mill
Close after 30~45min, move into steam curing box and continue maintenance processing, treat that maintenance terminates, by mixed material in steam curing box
It is transferred in baking oven, is dried under the conditions of temperature is 105~110 DEG C to constant weight, discharging, produce gunite concrete and mixed with high-activity fine
Material.
2. a kind of preparation method of gunite concrete fine mineral admixture according to claim 1, it is characterised in that：Step
Suddenly（1）Described constant-temperature enclosed fermentation condition is：35~37 DEG C of fermentation temperature, fermentation tank rotating speed is 200~300r/min, fermentation
Time is 5~7 days.
Step（1）After described 45~60min of drying fermenting steel slag powder filter cake insulation calcining, moreover it is possible to 10~30mL/min
Speed is passed through carbon dioxide into Muffle furnace, under the conditions of temperature is 880~900 DEG C, is incubated 30~60min of priming reaction.
Step（4）During described ball milling mixing, the absolute ethyl alcohol of mixed material quality 30~50% can also be added.
The beneficial effects of the invention are as follows：
（1）The present invention first with crush it is preliminary improve slag specific surface area, then coordinate that biogas slurry produces during the fermentation it is weak
Sour environment, dissolving removes acid soluble impurities in steel-making slag powder, the stability enhanced product performance, and corrodes slag surface, is formed
Pore structure, further improves steel-making slag powder specific surface area, then remove the fermentation organic matter remained in pore structure, calcining through calcining
During, the gas that organic matter volatilization is produced in pore structure can further expandable pores, recycle in calcining removal flyash
Carbonaceous is remained, and coordinates microwave ultrasound to act on, sulfuric acid solution is penetrated into inside flyash, dissolving removes acid soluble impurities,
Flyash is purified, in use, the calcium oxide of unhydrated part in cement, the later stage meet water after generate hydroxide
Calcium, calcium hydroxide again with silicon dioxde reaction in flyash, form new hyrate, colloid quantity in concrete is drastically increased
Plus, increased hyrate is filled in the pore structure of steel-making slag powder, improves the compactness of total；
（2）The present invention coordinates mechanical milling process by steam curing, makes steel-making slag powder and flyash further refinement and activation, maximum journey
The effect for playing both of degree, improves hydration reaction speed and fluidity of slurry energy of the product in course of hardening, from
And effectively keep concrete initial stage and later strength to continue to increase so that 3 days rupture strengths of gunite concrete reach 5.7~
6.1MPa, compression strength reaches 27.5~29.5MPa, and rupture strength reaches 9.6~9.8MPa within 28 days, and compression strength reaches 62.8
~65.2MPa, while being improved the anti-permeability performance and durability of concrete, service life extends 24~36 months.
Embodiment
300~500g converter slags are weighed, are placed in flour mill, 500~800 mesh sieves are crossed in 60~90min of grinding, discharging,
Steel-making slag powder is obtained, and gained steel-making slag powder is transferred in the fermentation tank for filling 3~5L biogas slurries, is 35~37 DEG C in temperature, rotating speed is 200
Under the conditions of~300r/min, constant-temperature enclosed fermentation 5~7 days, filtering obtains fermenting steel slag powder filter cake, and by gained fermenting steel slag powder
Filter cake is placed in baking oven, is dried under the conditions of temperature is 105~110 DEG C to constant weight, is obtained dry fermenting steel slag powder filter cake；By drying
Fermenting steel slag powder filter cake is transferred to Muffle furnace, and 650~700 DEG C are warming up to 10~15 DEG C/min rate programs, and insulation calcining 45~
60min, cools to room temperature with the furnace, discharging, must activate porous calcining steel-making slag powder；400~500g flyash is weighed, Muffle furnace is placed in
In, 30~45min is calcined under the conditions of temperature is 450~500 DEG C, room temperature to be cooled to the furnace falls the flyash after calcining
Enter to fill in the beaker that 1800~2000mL mass fractions are 10~15% sulfuric acid, then beaker is moved into ultrasonic-microwave chemical reaction
In device, in supersonic frequency be 35~40kHz, microwave power be 600~800W under the conditions of, react 60~90min；Question response knot
Beam, filtering, obtains removal of impurities flyash filter residue, and removal of impurities flyash filter residue filter residue is washed with deionized until cleaning solution is in neutrality,
The removal of impurities flyash filter residue filter residue after washing is transferred in baking oven again, dried under the conditions of temperature is 105~110 DEG C to constant weight,
Removal of impurities flyash filter residue must be dried；Count by weight, 40~60 parts of porous calcining slags of activation are sequentially added in batch mixer
Powder, 80~100 parts of dry removal of impurities flyash filter residues, in temperature be 55~60 DEG C, it is permanent under the conditions of rotating speed is 600~800r/min
Temperature stirring 2~3h of mixing, obtains mixed material；Mixed material is transferred to steam curing box, under the conditions of temperature is 95~100 DEG C,
Steam curing 5~7 days, during conserving, removes mixed material in steam curing box every 12~16h, through ball mill with 160
After 30~45min of~200r/min rotating speed ball milling mixings, move into steam curing box and continue maintenance processing, treat that maintenance terminates, will
Mixed material is transferred in baking oven in steam curing box, is dried under the conditions of temperature is 105~110 DEG C to constant weight, discharging, is produced spray
Penetrate concrete high-activity fine spike.
Example 1, prepare fine mineral admixture
500g converter slags are weighed, are placed in flour mill, grinding 90min, discharging crosses 800 mesh sieves, obtains steel-making slag powder, and by gained
Steel-making slag powder is transferred in the fermentation tank for filling 5L biogas slurries, in temperature be 37 DEG C, rotating speed be 300r/min under the conditions of, constant-temperature enclosed fermentation
7 days, filtering obtained fermenting steel slag powder filter cake, and gained fermenting steel slag powder filter cake is placed in baking oven, in temperature be 110 DEG C of conditions
Lower drying obtains dry fermenting steel slag powder filter cake to constant weight；Fermenting steel slag powder filter cake will be dried and be transferred to Muffle furnace, with 15 DEG C/min speed
Rate temperature programming is to 700 DEG C, and insulation calcining 60min cools to room temperature with the furnace, discharges, must activate porous calcining steel-making slag powder；Weigh
500g flyash, is placed in Muffle furnace, calcines 45min under the conditions of temperature is 500 DEG C, room temperature to be cooled to the furnace will be calcined
Flyash afterwards, which is poured into, to be filled in the beaker that 2000mL mass fractions are 15% sulfuric acid, then beaker is moved into ultrasonic-microwave chemistry instead
Answer in device, in supersonic frequency be 40kHz, microwave power be 800W under the conditions of, react 90min；Question response terminates, filtering, must remove
Miscellaneous powder coal ash filter residue, and removal of impurities flyash filter residue filter residue is washed with deionized until cleaning solution is in neutrality, then by after washing
Removal of impurities flyash filter residue filter residue is transferred in baking oven, is dried under the conditions of temperature is 110 DEG C to constant weight, obtains dry removal of impurities flyash filter
Slag；Count by weight, 60 parts of porous calcining steel-making slag powders of activation, 100 parts of dry removal of impurities flyash are sequentially added in batch mixer
Filter residue, is 60 DEG C in temperature, rotating speed is under the conditions of 800r/min, constant temperature stirring mixing 3h obtains mixed material；Mixed material is turned
Enter steam curing box, under the conditions of temperature is 100 DEG C, steam curing 7 days, during conserving, every 16h by steam curing box
Mixed material remove, through ball mill with 200r/min rotating speed ball milling mixings 45min after, move into steam curing box in continue maintenance at
Reason, treats that maintenance terminates, mixed material in steam curing box is transferred in baking oven, is dried under the conditions of temperature is 110 DEG C to constant weight,
Discharging, produces gunite concrete high-activity fine spike.
Example 2, prepare fine mineral admixture
300g converter slags are weighed, are placed in flour mill, grinding 60min, discharging crosses 500 mesh sieves, obtains steel-making slag powder, and by gained
Steel-making slag powder is transferred in the fermentation tank for filling 3L biogas slurries, in temperature be 35 DEG C, rotating speed be 200r/min under the conditions of, constant-temperature enclosed fermentation
5 days, filtering obtained fermenting steel slag powder filter cake, and gained fermenting steel slag powder filter cake is placed in baking oven, in temperature be 105 DEG C of conditions
Lower drying obtains dry fermenting steel slag powder filter cake to constant weight；Fermenting steel slag powder filter cake will be dried and be transferred to Muffle furnace, with 10 DEG C/min speed
Rate temperature programming is to 650 DEG C, and insulation calcining 45min is passed through carbon dioxide into Muffle furnace with 10mL/min speed, is in temperature
Under the conditions of 880 DEG C, priming reaction 30min is incubated, room temperature is cooled to the furnace, discharged, porous calcining steel-making slag powder must be activated；Weigh
400g flyash, is placed in Muffle furnace, calcines 30min under the conditions of temperature is 450 DEG C, room temperature to be cooled to the furnace will be calcined
Flyash afterwards, which is poured into, to be filled in the beaker that 1800mL mass fractions are 10% sulfuric acid, then beaker is moved into ultrasonic-microwave chemistry instead
Answer in device, in supersonic frequency be 35kHz, microwave power be 600W under the conditions of, react 60min；Question response terminates, filtering, must remove
Miscellaneous powder coal ash filter residue, and removal of impurities flyash filter residue filter residue is washed with deionized until cleaning solution is in neutrality, then by after washing
Removal of impurities flyash filter residue filter residue is transferred in baking oven, is dried under the conditions of temperature is 105 DEG C to constant weight, obtains dry removal of impurities flyash filter
Slag；Count by weight, 40 parts of porous calcining steel-making slag powders of activation, 80 parts of dry removal of impurities flyash filters are sequentially added in batch mixer
Slag, is 55 DEG C in temperature, rotating speed is under the conditions of 600r/min, constant temperature stirring mixing 2h obtains mixed material；Mixed material is transferred to
Steam curing box, under the conditions of temperature is 95 DEG C, steam curing 5 days during conserving, will be mixed every 12h in steam curing box
Compound material remove, through ball mill with 160r/min rotating speed ball milling mixings 30min after, move into steam curing box in continue maintenance at
Reason, treats that maintenance terminates, mixed material in steam curing box is transferred in baking oven, is dried under the conditions of temperature is 105 DEG C to constant weight,
Discharging, produces gunite concrete high-activity fine spike.
Example 3, prepare fine mineral admixture
400g converter slags are weighed, are placed in flour mill, grinding 80min, discharging crosses 600 mesh sieves, obtains steel-making slag powder, and by gained
Steel-making slag powder is transferred in the fermentation tank for filling 4L biogas slurries, in temperature be 36 DEG C, rotating speed be 250r/min under the conditions of, constant-temperature enclosed fermentation
6 days, filtering obtained fermenting steel slag powder filter cake, and gained fermenting steel slag powder filter cake is placed in baking oven, in temperature be 107 DEG C of conditions
Lower drying obtains dry fermenting steel slag powder filter cake to constant weight；Fermenting steel slag powder filter cake will be dried and be transferred to Muffle furnace, with 12 DEG C/min speed
Rate temperature programming is to 670 DEG C, and insulation calcining 50min cools to room temperature with the furnace, discharges, must activate porous calcining steel-making slag powder；Weigh
450g flyash, is placed in Muffle furnace, calcines 40min under the conditions of temperature is 470 DEG C, room temperature to be cooled to the furnace will be calcined
Flyash afterwards, which is poured into, to be filled in the beaker that 1900mL mass fractions are 13% sulfuric acid, then beaker is moved into ultrasonic-microwave chemistry instead
Answer in device, in supersonic frequency be 37kHz, microwave power be 700W under the conditions of, react 80min；Question response terminates, filtering, must remove
Miscellaneous powder coal ash filter residue, and removal of impurities flyash filter residue filter residue is washed with deionized until cleaning solution is in neutrality, then by after washing
Removal of impurities flyash filter residue filter residue is transferred in baking oven, is dried under the conditions of temperature is 107 DEG C to constant weight, obtains dry removal of impurities flyash filter
Slag；Count by weight, 50 parts of porous calcining steel-making slag powders of activation, 90 parts of dry removal of impurities flyash filters are sequentially added in batch mixer
Slag, is 57 DEG C in temperature, rotating speed is under the conditions of 700r/min, constant temperature stirring mixing 2h obtains mixed material；Mixed material is transferred to
Steam curing box, under the conditions of temperature is 98 DEG C, steam curing 6 days during conserving, will be mixed every 14h in steam curing box
Compound material is removed, through ball mill with 180r/min rotating speed ball milling mixing 40min, in ball milling mixing, adds mixed material quality
30~50% absolute ethyl alcohol, after ball milling terminates, moves into steam curing box and continues maintenance processing, treat that maintenance terminates, steam is supported
Mixed material is transferred in baking oven in protecting box, is dried under the conditions of temperature is 107 DEG C to constant weight, discharging, produces gunite concrete use
High-activity fine spike.
Example 4, prepare concrete
The gunite concrete prepared in example 1 is added in cement with high-activity fine spike, the amount of addition is cement quality
20%, after the completion of addition, then by the ratio of mud 0.25, water is added, mixing is stirred, you can obtain concrete.Detect concrete
Performance, specific testing index is shown in Table 1.
Example 5, prepare concrete
The gunite concrete prepared in example 2 is added in cement with high-activity fine spike, the amount of addition is cement quality
20%, after the completion of addition, then by the ratio of mud 0.25, water is added, mixing is stirred, you can obtain concrete.Detect concrete
Performance, specific testing index is shown in Table 1.
Example 6, prepare concrete
The gunite concrete prepared in example 3 is added in cement with high-activity fine spike, the amount of addition is cement quality
20%, after the completion of addition, then by the ratio of mud 0.25, water is added, mixing is stirred, you can obtain concrete.Detect concrete
Performance, specific testing index is shown in Table 1.
Table 1
Above-described embodiment is not limited for the present invention preferably embodiment, but embodiments of the present invention by above-described embodiment
System, other any Spirit Essences without departing from the present invention and the change made under principle, modification, replacement, combine, simplification,
Equivalent substitute mode is should be, is included within protection scope of the present invention.
Claims (4)
1. a kind of preparation method of gunite concrete fine mineral admixture, it is characterised in that specifically preparation process is：
（1）300~500g converter slags are weighed, 500~800 mesh sieves are crossed after crushing, steel-making slag powder are obtained, and gained steel-making slag powder is transferred to
In the fermentation tank for filling 3~5L biogas slurries, constant-temperature enclosed fermentation is filtered, and is dried, is obtained dry fermenting steel slag powder filter cake, then by drying
Fermenting steel slag powder filter cake is transferred to Muffle furnace, and 650~700 DEG C are warming up to 10~15 DEG C/min rate programs, and insulation calcining 45~
60min, cools to room temperature with the furnace, discharging, must activate porous calcining steel-making slag powder；
（2）Weigh 400~500g flyash, be placed in Muffle furnace, in temperature be 450~500 DEG C under the conditions of calcining 30~
45min, room temperature to be cooled to the furnace, it is 10~15% that the flyash after calcining, which is poured into, and fills 1800~2000mL mass fractions
In the beaker of sulfuric acid, then by beaker move into ultrasound microwave chemical reactor in, in supersonic frequency be 35~40kHz, microwave power
Under the conditions of 600~800W, 60~90min is reacted, question response terminates, filtered, washed, dried, obtain dry removal of impurities flyash filter
Slag；
（3）Count by weight, 40~60 parts of porous calcining steel-making slag powders of activation are sequentially added in batch mixer, 80~100 parts are done
Dry removal of impurities flyash filter residue, in temperature be 55~60 DEG C, rotating speed be 600~800r/min under the conditions of, constant temperature stirring mixing 2~
3h, obtains mixed material；
（4）Mixed material is transferred to steam curing box, under the conditions of temperature is 95~100 DEG C, steam curing 5~7 days, in maintenance
Period, mixed material in steam curing box is removed every 12~16h, it is mixed with 160~200r/min rotating speeds ball milling through ball mill
Close after 30~45min, move into steam curing box and continue maintenance processing, treat that maintenance terminates, by mixed material in steam curing box
It is transferred in baking oven, is dried under the conditions of temperature is 105~110 DEG C to constant weight, discharging, produce gunite concrete and mixed with high-activity fine
Material.
2. a kind of preparation method of gunite concrete fine mineral admixture according to claim 1, it is characterised in that：Step（1）
Described constant-temperature enclosed fermentation condition is：35~37 DEG C of fermentation temperature, fermentation tank rotating speed is 200~300r/min, fermentation time
For 5~7 days.
3. a kind of preparation method of gunite concrete fine mineral admixture according to claim 1, it is characterised in that：Step（1）
After described 45~60min of drying fermenting steel slag powder filter cake insulation calcining, moreover it is possible to 10~30mL/min speed into Muffle furnace
Carbon dioxide is passed through, under the conditions of temperature is 880~900 DEG C, 30~60min of priming reaction is incubated.
4. a kind of preparation method of gunite concrete fine mineral admixture according to claim 1, it is characterised in that：Step（4）
During described ball milling mixing, the absolute ethyl alcohol of mixed material quality 30~50% can also be added.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110423031A (en) * | 2019-08-22 | 2019-11-08 | 绿材实业有限责任公司 | A kind of method of modifying improving flyash intensity |
| CN112174597A (en) * | 2020-09-01 | 2021-01-05 | 苏州易斯特建材科技有限公司 | Fiber-reinforced dry mixed powder of steel slag concrete and method for maintaining pavement of fiber-reinforced dry mixed powder |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106587685A (en) * | 2016-12-15 | 2017-04-26 | 上海宝田新型建材有限公司 | Compound coal ash admixture for concrete |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106587685A (en) * | 2016-12-15 | 2017-04-26 | 上海宝田新型建材有限公司 | Compound coal ash admixture for concrete |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110423031A (en) * | 2019-08-22 | 2019-11-08 | 绿材实业有限责任公司 | A kind of method of modifying improving flyash intensity |
| CN112174597A (en) * | 2020-09-01 | 2021-01-05 | 苏州易斯特建材科技有限公司 | Fiber-reinforced dry mixed powder of steel slag concrete and method for maintaining pavement of fiber-reinforced dry mixed powder |
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