CN110357474A - A kind of concrete additive and preparation method thereof - Google Patents
A kind of concrete additive and preparation method thereof Download PDFInfo
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- CN110357474A CN110357474A CN201910657085.3A CN201910657085A CN110357474A CN 110357474 A CN110357474 A CN 110357474A CN 201910657085 A CN201910657085 A CN 201910657085A CN 110357474 A CN110357474 A CN 110357474A
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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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- Engineering & Computer Science (AREA)
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- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
This programme discloses a kind of concrete additive of additive production technical field, including 40~60 parts of granulated blast-furnace slag, 25~35 parts of flyash, 15~18 parts of silicon ash, 20~30 parts of zeolite powder and 2~4 parts of land plaster.When preparation, comprising the following steps: one, be uniformly mixed granulated blast-furnace slag, flyash, silicon ash, zeolite powder and land plaster, it roll squeezer is added carries out pre- grinding and obtain material cake, pre- grinding pressure is 150~200MPa；Two, roll squeezer is added in material cake that step 1 obtains and is roughly ground to obtain primary powder, when corase grinding, static powder separating machine and dynamic powder concentrator comparison surface area is selected to be greater than 500m2The micro mist of/kg is screened, in addition, selecting the bushel iron in iron remover removal material cake；Three, fine grinding in ball mill is added in primary powder that step 2 obtains and obtains concrete additive, when fine grinding, it is the wear-resisting bead of 8mm that abrasive body, which selects diameter,.This programme while guaranteeing additive activity, can significantly reduce production cost and improve yield by optimizing the raw material of additive and improving additional agent producing process.
Description
Technical field
The invention belongs to additive production technical field, in particular to a kind of concrete additive and preparation method thereof.
Background technique
Concrete admixture is mixed during ready-mixed concrete, and it is below to account for cement quality 5%, can be significantly improved mixed
The chemical substance of solidifying soil nature energy.The characteristics of concrete admixture is that wide in variety, volume is small, is affected to the performance of concrete,
With small investment, quick, technical economic benefit outstanding feature.With being constantly progressive for science and technology, additive is more next
It is applied more, additive has become the important component of concrete.
In addition, the active size of additive directly determines the performance height of concrete and cement, and to additive activity
Play the specific surface area of the mainly raw material and additive of deciding factor；Wherein the specific surface area of additive refers to unit mass
The gross area possessed by material, with the increase of the specific surface area of slag micropowder, activity also and then increases.
The concrete produced at present is mainly slag micropowder with additive, and main material is with blast furnace process molten iron disintegrating slag
(Iron-ore Slag), and since the grindability of Iron-ore Slag is very low, so that its specific surface area maximum can only arrive 450m2/ kg, activity are relatively low
And it is difficult to ensure the active demand of concrete different times, the power consumption in process of lapping is also higher.
In response to this, our company has obtained a kind of tool by optimizing to slag micropowder raw material and production technology
The complex ore slag fine powder of standby greater activity, application No. is: CN201510336966.7, the composition and its quality of complex ore slag fine powder
Number are as follows: 1~20 part of Iron-ore Slag, 20~50 parts of flyash, 30~80 parts of phosphorus ore slag, 1~2 part of carbonic acid sodium powder, 1~5 part of white sugar,
5~10 parts of salt, 10~20 parts of silica flour.When the specific surface area of complex ore slag fine powder reaches 450m2/ kg~550m2It is compound when/kg
The activity of slag micropowder can reach 75%；When the specific surface area of complex ore slag fine powder reaches 550m2/ kg~650m2It is compound when/kg
The activity of slag micropowder can reach 95%；When the specific surface area of complex ore slag fine powder reaches 680m2When/kg or more, complex ore slag
The activity of micro mist can reach 105%.
Wherein, the process of lapping of Iron-ore Slag is larger for the loss of equipment, while Iron-ore Slag is as complex ore slag fine powder
A part can reduce the overall activity of complex ore slag fine powder.Based on this, our company continues externally to add agent in subsequent production
Formula and production technology optimize, and finally in the case where keeping or reducing additive specific surface area, promote the work of additive
Property.
Summary of the invention
The invention is intended to provide a kind of concrete additive, to realize compared with low specific surface area, improve outer
Add the activity of agent；In addition, the present invention also provides a kind of concrete additive preparation method, to reduce electric energy loss and improve outer
Add agent yield.
One of this programme concrete additive, including raw material and its parts by weight are as follows: granulated blast-furnace slag 40
~60 parts, 25~35 parts of flyash, 15~18 parts of silicon ash, 20~30 parts of zeolite powder and 2~4 parts of land plaster.
This programme the utility model has the advantages that this programme chooses raw material easily takes and at low cost.Wherein, granulated blast-furnace slag is in blast furnace
When manUfaCtUre of pig iron, obtain with silicate and alumino-silicate fusant as main component, the fusant institute after quenching granulating again
?；It is with potential hydraulic gelling.Flyash is all industrial emissions, has procurement cost low, the high feature of grindability.Silicon
Ash and the main component of zeolite powder are all silica, but its auxiliary element has a significant difference, the two cooperate flyash and
Granulated blast-furnace slag uses, and is remarkably improved activity, workability, gumminess and the early epistasis of additive.Land plaster belongs to industry
Waste is used cooperatively with granulated blast-furnace slag, and the additive entirety hydraulicity can be improved.Pass through the phase interworking between five kinds of raw materials
Close, in the case where keeping identical specific surface area or being decreased slightly as low specific surface area, the additive produced have more preferably activity and
Yi Xing, gumminess and early epistasis.
Further, the raw material and its parts by weight are as follows: 45~55 parts of granulated blast-furnace slag, 30~35 parts of flyash,
15~18 parts of silicon ash, 25~30 parts of zeolite powder and 2~4 parts of land plaster.
Further, the raw material and its parts by weight are as follows: 55 parts of granulated blast-furnace slag, 30 parts of flyash, 18 parts of silicon ash,
25 parts and 2 parts of land plaster of zeolite powder.
Further, the raw material and its parts by weight are as follows: 45 parts of granulated blast-furnace slag, 35 parts of flyash, 15 parts of silicon ash,
30 parts and 4 parts of land plaster of zeolite powder.
Further, the raw material and its parts by weight are as follows: 40 parts of granulated blast-furnace slag, 25 parts of flyash, 17 parts of silicon ash,
20 parts and 3 parts of land plaster of zeolite powder.
Further, the raw material and its parts by weight are as follows: 60 parts of granulated blast-furnace slag, 32 parts of flyash, 16 parts of silicon ash,
28 parts and 4 parts of land plaster of zeolite powder.
Based on above-mentioned raw materials, the present invention also provides a kind of preparation methods of concrete additive, comprising the following steps:
Step 1: granulated blast-furnace slag, flyash, silicon ash, zeolite powder and land plaster are uniformly mixed, it is added in roll squeezer
It carries out pre- grinding and obtains material cake, pre- grinding pressure is 150~200MPa；
Roughly ground Step 2: material cake that step 1 obtains is added in roll squeezer, after corase grinding, select static powder separating machine and
Dynamic powder concentrator compares surface area and is greater than 450m2The micro mist of/kg is screened to obtain primary powder, in addition, selecting iron remover removal
Expect the bushel iron in cake；
Step 3: fine grinding in ball mill, which is added, in primary powder that step 2 obtains obtains concrete additive, when fine grinding,
It is the wear-resisting bead of 8mm that abrasive body, which selects diameter,.
Pre- grinding is carried out to raw material using roll squeezer, when applying pressure to raw material due to roll squeezer, the available energy of pressure roller is straight
It connects and passes to raw material, after strain caused by this pure pressure is 5 times or so that shearing generates strain, therefore raw material is pressurized,
Inside can produce a large amount of crackles, be conducive to the progress of subsequent corase grinding.In addition, since roll squeezer pressure utility ratio is high, relative to
Using tube mill, 15%~25% can be economized on electricity, volume increase 25%~40%.
Material cake enters roll squeezer and is roughly ground, the construction cost of roll squeezer be only similar grinding effect system 40%~
50%.When roughly grinding using roll squeezer, static powder separating machine and dynamic powder concentrator comparison surface area is selected to be greater than 450m2/ kg's is micro-
Powder is screened, and it is excessive to avoid fine powder in roll squeezer, is caused to expect that cake is broken up difficult and causes material cake secondary extrusion, is caused roll-in
The case where machine vibration, occurs.In addition, avoiding roll squeezer to thin by the screening of static powder separating machine and dynamic powder concentrator to fine powder
The case where powder excessive compression, occurs.Meanwhile iron remover being selected to be removed the iron in material cake, it can effectively reduce iron in additive
The content of powder helps to improve the activity of additive.Moreover, fine powder is to roll squeezer and subsequent ball milling machine with the reduction of iron
Abrasion substantially reduce, be conducive to extend the service life of production equipment and improve production capacity.
Primary powder polarity is refined finally by ball mill, and diameter is selected to be used as abrasive body for the wear-resisting bead of 8mm,
Due to wear-resisting bead small volume, wear-resisting bead is largely used, ball mill is increased and pinches contact surface between material and abrasive body
Product reduces electrostatic in mill and generates, greatly improve the activity of additive so that the particle circularity of material is good.
Further, when step 3 is refined, high-efficient powder concentrator and ball mill is selected to carry out closed circuit fine grinding.By selecting efficiently choosing
Powder machine and ball mill carry out closed circuit fine grinding, can significantly reduce material consumption, while reducing noise.
Specific embodiment
It is further described below by specific embodiment:
A kind of embodiment 1: preparation method of concrete additive, comprising the following steps:
Step 1: in parts by weight by each raw material: 55 parts of granulated blast-furnace slag, 30 parts of flyash, 18 parts of silicon ash, zeolite powder
25 parts and 2 parts of land plaster are uniformly mixed, and are added in roll squeezer and are carried out pre- grinding and obtain material cake, and pre- grinding pressure is 150~
200MPa；
It is roughly ground Step 2: the material cake that step 1 obtains is added in roll squeezer, corase grinding pressure is 150Mpa, corase grinding
Afterwards, static powder separating machine and dynamic powder concentrator comparison surface area is selected to be greater than 450m2The micro mist of/kg is screened to obtain primary powder,
In addition, selecting the bushel iron in iron remover removal material cake；
Step 3: fine grinding in ball mill, which is added, in primary powder that step 2 obtains obtains concrete additive, when fine grinding,
High-efficient powder concentrator and ball mill is selected to carry out closed circuit fine grinding, it is the wear-resisting bead of 8mm that abrasive body, which selects diameter,；After fine grinding, according to
Additive is divided into three ranks by the specific surface area of additive, and respectively I grades: specific surface area >=650m2/kg；II grades: 550m2/
Kg≤specific surface area < 650m2/kg；III level: 450m2/ kg≤specific surface area < 550m2/kg。
Embodiment 2 the difference is that only that the proportion of each raw material is different from embodiment 1, according to parts by weight specifically:
45 parts of granulated blast-furnace slag, 35 parts of flyash, 15 parts of silicon ash, 30 parts of zeolite powder and 4 parts of land plaster.
Embodiment 3 the difference is that only that the proportion of each raw material is different from embodiment 1, according to parts by weight specifically:
40 parts of granulated blast-furnace slag, 25 parts of flyash, 17 parts of silicon ash, 20 parts of zeolite powder and 3 parts of land plaster.
Embodiment 4 the difference is that only that the proportion of each raw material is different from embodiment 1, according to parts by weight specifically:
60 parts of granulated blast-furnace slag, 32 parts of flyash, 16 parts of silicon ash, 28 parts of zeolite powder and 4 parts of land plaster.
Comparative example 1 the difference is that only that the raw material and its parts by weight that additive includes are different with embodiment 1, tool
Body are as follows: the raw material and its parts by weight that additive includes are as follows: 15 parts of Iron-ore Slag, 40 parts of flyash, 50 parts of phosphorus ore slag, carbonic acid sodium powder
1.4 parts, 4 parts of white sugar, 9 parts of salt, 16 parts of silica flour.
Comparative example 2 the difference is that only that the preparation method of additive is different with embodiment 1；Specifically: one, by weight
Number is measured by each raw material: 55 parts of granulated blast-furnace slag, 30 parts of flyash, 18 parts of silicon ash, 25 parts of zeolite powder and 2 parts of land plaster mixing
Uniformly；Roll-in crusher machine is added, is sieved with sieve, filters out specific surface area greater than 350m2The level-one micro mist of/kg；Specific surface area
Less than 350m2The particle of/kg is added in roll squeezer again and is crushed, and so in triplicate, obtains specific surface area greater than 350m2/ kg's
Level-one micro mist；
Two, the level-one micro mist that step 1 obtains is added in ball mill and is ground, then screen to obtain specific surface with V-type grader
Product is greater than 550m2The second level micro mist of/kg；Specific surface area is less than 550m2The particle of/kg is added in ball mill again to be ground, so weight
Again three times, specific surface area is obtained greater than 550m2The second level micro mist of/kg；
Three, the second level micro mist that step 2 obtains is added in ball mill and is ground, then compared with screening in gas flow sizing machine
Surface area is greater than 650m2The three-level micro mist of/kg；Specific surface area is less than 650m2The particle of/kg is added in ball mill again to be ground, such as
This obtains specific surface area greater than 650m in triplicate2The three-level micro mist of/kg.
Granulated blast-furnace slag is replaced with Iron-ore Slag by comparative example 3 and the difference is that only for embodiment 1.
Comparative example 4 and the difference is that only in additive raw material for embodiment 1 lack granulated blast-furnace slag.
Comparative example 5 and the difference is that only in additive raw material for embodiment 1 lack land plaster.
Comparative example 6 and the difference is that only in additive raw material for embodiment 1 lack zeolite powder.
Comparative example 7 is that application No. is the embodiments 5 in " CN201510336966.7 " application documents.
Roll squeezer in Examples 1 to 4 and comparative example 1~7 selects the roll squeezer of Jiangsu Peng Fei group production；Ball mill choosing
With 3.2m*17.5m, ball mill is produced by Jiangsu Peng Fei group；High-efficient powder concentrator selects the production of Beijing Chinese Academy of Social Sciences, model
The high-efficient powder concentrator of GDX -80.
Fluidity and activity index test are carried out to additive made from Examples 1 to 4 and comparative example 1~7, it is specific to test
Method is as follows:
Instrument is used in test
Using the test instrument of defined in 17671 Test method for strength of hydraulic cement mortar of GB/T (IS0 method).
Material is used in test
1, cement
Using reference cement specified in GB 8076-1997 annex c.When cannot get reference cement for some reason, allow to use
C3A content 6%~8%, total alkali content (Na2Ten 0.658K of O%20%) clinker no more than 1% and dihydrate gypsum, slag are ground jointly
The strength grade of system is greater than the ordinary portland cement of (containing) 42.5, but there is still a need for reference cements for arbitration.
2, sand
Meet normal sand as defined in GB/T 17671.
3, water
Using tap water or distilled water.
4, additive
Inspected additive.
Experimental condition and method
1, experimental condition
Laboratory should meet in GB/T 17617-1999 4,1 regulation.Test a variety of materials and apparatus should be previously placed in
In laboratory, the identical temperature of laboratory is reached.
2, test method
2.1 glue sand proportion
It is shown in Table A1.
1 glue sand of Table A proportion
| Material | Benchmark glue sand | By inspection glue sand |
| Cement | 450 scholars 2 | 315 scholars 1 |
| Additive | - | 135 scholars 1 |
| ISO sand | 1350 soil 5 | 1350 scholars 5 |
| Water | 225 soil 1 | 225 scholars 1 |
2.2 stirring
Water is added in agitated kettle, the cement and additive mixed in advance is added, pot is placed on fixed frame, is risen
To fixed position.Then it is stirred by GB/T17671-1999 6.3, after machining, after stirring at low speed 30s, second
Equably sand is added while beginning by a 30s.It, successively will be required since most coarse fraction when sand at different levels are packing
Every grade of sand amount add.Machine is gone to high speed and mixes 30S again.Stop mixing 90s, with a rubber scraping by leaf in first 15S
Glue sand on piece and pot wall is scraped into excessively intermediate.Continue to stir 60s at high speeds.Each agitation phases, time error should be in native 1s
Within.Flow of cement mortar measurement is carried out referring to GB/T 2419.
The preparation of 2.3 test specimens
It is carried out by the 7th chapter in GB/T17671-1999.
The maintenance of 2.4 test specimens
2.4.1 test specimen demoulding pre-treatment and maintenance in maintenance, demoulding, water are by 8.1,8.2 and 8.3 in GB/T17671-1999
It carries out.
2.4.2 intensity and test age
Examination body age be since cement plus water stirring test when count, different larval instar strength test in the following time into
Row.
--- 72h scholar 45min
--- 7d scholar 2h
--- 28d scholar 8h
2.5 results and calculating
2.5.1 fluidity ratio
It is matched according to Table A 1, measures benchmark mortar fluidity and the fluidity by inspection glue sand, calculate additive by formula A1
The ratio between fluidity:
In formula Rw one by one by inspection glue sand fluidity ratio, %:
W1 is one by one by the fluidity of inspection glue sand
The fluidity of W benchmark glue sand one by one
Calculated result is taken as integer.
2.5.2 additive activity index calculates
After measuring corresponding age benchmark glue sand and test glue sand compression strength, the phase age of additive is calculated by formula A2
Activity index.
In formula: the activity index of A additive one by one.
R1 is answered the intensity of age, MPa by inspection glue sand facies one by one
Benchmark glue sand facies answer the intensity of age, MPa to R0 one by one
Calculated result is taken as integer.
According to the above method, the activity index and fluidity of Examples 1 to 4 and the additive in comparative example 1~7 are calculated
Such as shown in following table A2:
Table A 2
By Table A 2 it is found that its activity index of the additive of Examples 1 to 4 preparation is substantially better than comparative example 1~7, while its
Fluidity ratio is also relatively good.Although be pointed out that Examples 1 to 4 in preparation method compared with the existing technology in system
For Preparation Method, although it is in the levigate upper not too big variation to raw material, since the pre- grinding stage makes raw material
Inside generates a large amount of slight cracks；Make the appearance of fine powder brighter and cleaner using lesser abrasive body in the later period simultaneously, therefore same
Under specific surface area, using the additive of preparation method production of Examples 1 to 4, its activity index is more preferable.The investment of equipment simultaneously
Expense is lower, and production capacity is higher.
It carries out workability, gumminess and early epistasis for the additive of Examples 1 to 4 and comparative example 7 to compare, embodiment 1
~4 additive performance is promoted, but it is not significant to promote effect.
Claims (8)
1. a kind of concrete additive, it is characterised in that: including raw material and its parts by weight are as follows: granulated blast-furnace slag 40~
60 parts, 25~35 parts of flyash, 15~18 parts of silicon ash, 20~30 parts of zeolite powder and 2~4 parts of land plaster.
2. a kind of concrete additive according to claim 1, it is characterised in that: the raw material and its parts by weight
Are as follows: 45~55 parts of granulated blast-furnace slag, 30~35 parts of flyash, 15~18 parts of silicon ash, 25~30 parts of zeolite powder and land plaster 2~
4 parts.
3. a kind of concrete additive according to claim 1, it is characterised in that: the raw material and its parts by weight
Are as follows: 55 parts of granulated blast-furnace slag, 30 parts of flyash, 18 parts of silicon ash, 25 parts of zeolite powder and 2 parts of land plaster.
4. a kind of concrete additive according to claim 1, it is characterised in that: the raw material and its parts by weight
Are as follows: 45 parts of granulated blast-furnace slag, 35 parts of flyash, 15 parts of silicon ash, 30 parts of zeolite powder and 4 parts of land plaster.
5. a kind of concrete additive according to claim 1, it is characterised in that: the raw material and its parts by weight
Are as follows: 40 parts of granulated blast-furnace slag, 25 parts of flyash, 17 parts of silicon ash, 20 parts of zeolite powder and 3 parts of land plaster.
6. a kind of concrete additive according to claim 1, it is characterised in that: the raw material and its parts by weight
Are as follows: 60 parts of granulated blast-furnace slag, 32 parts of flyash, 16 parts of silicon ash, 28 parts of zeolite powder and 4 parts of land plaster.
7. the preparation method of described in any item concrete additives according to claim 1~6, it is characterised in that: including with
Lower step:
Step 1: granulated blast-furnace slag, flyash, silicon ash, zeolite powder and land plaster are uniformly mixed, it is added in roll squeezer and carries out
Pre- grinding obtains material cake, and pre- grinding pressure is 150~200MPa；
It is roughly ground Step 2: the material cake that step 1 obtains is added in roll squeezer, after corase grinding, selects static powder separating machine and dynamic
Powder concentrator compares surface area and is greater than 450m2The micro mist of/kg is screened to obtain primary powder, in addition, selecting iron remover removal material cake
In bushel iron；
Step 3: fine grinding in ball mill, which is added, in primary powder that step 2 obtains obtains concrete additive, when fine grinding, grinding
It is the wear-resisting bead of 8mm that body, which selects diameter,.
8. a kind of preparation method of concrete additive according to claim 7, it is characterised in that: step 3 fine grinding
When, select high-efficient powder concentrator and ball mill to carry out closed circuit fine grinding.
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| CN201910657085.3A CN110357474A (en) | 2019-07-19 | 2019-07-19 | A kind of concrete additive and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910657085.3A CN110357474A (en) | 2019-07-19 | 2019-07-19 | A kind of concrete additive and preparation method thereof |
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ID=68221297
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113213802A (en) * | 2021-05-10 | 2021-08-06 | 江苏金木土科技有限公司 | High-performance concrete admixture and production method thereof |
| CN114890757A (en) * | 2022-06-30 | 2022-08-12 | 深圳市衡骏环保科技有限公司 | Recycled aggregate concrete and preparation method thereof |
| CN115057641A (en) * | 2022-06-30 | 2022-09-16 | 深圳市衡骏环保科技有限公司 | Engineering waste soil-based regenerative functional aggregate and preparation method thereof |
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| CN103041906A (en) * | 2013-01-03 | 2013-04-17 | 湖南三泓建材有限公司 | Slag micropowder grinding system and technology |
| CN205966118U (en) * | 2016-08-11 | 2017-02-22 | 中建材（合肥）粉体科技装备有限公司 | Multi -functional grinding system |
| CN106746809A (en) * | 2016-12-31 | 2017-05-31 | 贵州贵鑫科技环保建材有限公司 | A kind of complex slag and preparation method thereof |
| CN108218276A (en) * | 2018-02-02 | 2018-06-29 | 中国建筑科学研究院有限公司 | Viscosity reduction enhancer for concrete and application thereof |
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| CN1287104A (en) * | 2000-10-08 | 2001-03-14 | 华南理工大学 | Mixture for cement and high-performance concrete and its preparation process |
| CN103041906A (en) * | 2013-01-03 | 2013-04-17 | 湖南三泓建材有限公司 | Slag micropowder grinding system and technology |
| CN205966118U (en) * | 2016-08-11 | 2017-02-22 | 中建材（合肥）粉体科技装备有限公司 | Multi -functional grinding system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113213802A (en) * | 2021-05-10 | 2021-08-06 | 江苏金木土科技有限公司 | High-performance concrete admixture and production method thereof |
| CN114890757A (en) * | 2022-06-30 | 2022-08-12 | 深圳市衡骏环保科技有限公司 | Recycled aggregate concrete and preparation method thereof |
| CN115057641A (en) * | 2022-06-30 | 2022-09-16 | 深圳市衡骏环保科技有限公司 | Engineering waste soil-based regenerative functional aggregate and preparation method thereof |
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Application publication date: 20191022 |