CN101367631A - Ultra-fine coal ash based composite mineral blending material and manufacturing method thereof - Google Patents
Ultra-fine coal ash based composite mineral blending material and manufacturing method thereof Download PDFInfo
- Publication number
- CN101367631A CN101367631A CNA2008101518972A CN200810151897A CN101367631A CN 101367631 A CN101367631 A CN 101367631A CN A2008101518972 A CNA2008101518972 A CN A2008101518972A CN 200810151897 A CN200810151897 A CN 200810151897A CN 101367631 A CN101367631 A CN 101367631A
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- Prior art keywords
- ultra
- coal ash
- based composite
- fine coal
- composite mineral
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Classifications
-
- 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
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
- C04B2103/308—Slump-loss preventing agents
-
- 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)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a superfine fly-ash complex mineral addition and a preparation method thereof; the complex mineral addition is prepared by using the superfine and pulverized fly ash as the main part, then compositing slag powder and an excitant according to the granularity optimal combination and the chemical excitation theory. The weight of the slag powder is 0.1 time to 0.6 time greater than that of the superfine fly ash, and the use amount of the excitant accounts for 5 millesimals to 8 millesimals of the total amount. The optimal proportion of the superfine fly-ash complex mineral addition mixed in concrete is 15 percent to 30 percent. Compared with ordinary mineral additions, the use of the mineral addition can obviously improve the fresh mixing performance of concrete and evidently increase the initial slump constant, and hardly suffers loss within 90 minutes. The compaction rate of the hardened concrete is high, and the strength and lasting quality thereof are greatly improved, therefore, the mineral addition is a high-performance and high-function mineral addition which is perfectly suitable for preparing high-strength and high-performance concretes above C60 level.
Description
Technical field
The invention belongs to material of construction and manufacture method thereof, ultra-fine coal ash based composite mineral blending material that particularly a kind of suitable preparation high performance concrete is used and preparation method thereof.
Background technology
For the workability that improves fresh concrete and the work-ing life of maturing, in the concrete manufacturing processed, all need add mineral admixture.Mineral admixture not only can improve the workability of fresh concrete, and can make the maturing structure more closely knit, thereby makes concrete more durable.
The mineral admixture of concrete production use at present mainly is flyash or slag powders, and fineness is generally at 400～600m
2/ kg.These two kinds of Additives have also played considerable effect when the preparation high performance concrete, but at present when producing and using these common mineral admixtures, also do not consider coupling with cement granularity, do not realize that from cementitious material system the requirement of best degree of compactness is optimized, therefore when mixing the high-strength high-performance concrete of making more than the C60 level, also must add a kind of expensive silicon ash as stopping composition, to remedy fine grain deficiency.The silicon ash is because the source is short, and price often exceeds more than 10 times of these common mineral admixtures.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of cheap, superior performance, ultra-fine coal ash based composite mineral blending material that suitable preparation high performance concrete is used and preparation method thereof.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is: a kind of ultra-fine coal ash based composite mineral blending material comprises the component of following weight proportion:
Specific surface area is 1000m
2/ kg ± 100m
2100 parts of the superfined flyashs of/kg
Fineness is 450m
2/ kg ± 50m
210～60 parts of the slag powders of/kg
5 ‰ of the total stuff amount of exciting agent superfined flyash and slag powders～8 ‰
Described exciting agent is mixed by 10～30 parts of saccharans, 10～30 parts of sodium-acetates, 10～30 parts of alkanolamines and 10～70 parts of carrier water by weight.
Described superfined flyash is to be directly used in concrete meal coal ash, and is levigate to accounting for more than 90% of size composition less than the particle of 5 μ m.
The degree of compactness of described ultra-fine coal ash based composite mineral blending material is more than 0.65.
The molecular-weight average of described saccharan is between 10000～30000.
Described alkanolamine is one or more the mixing in trolamine, diethanolamine, Monoethanolamine MEA BASF, the tri-isopropanolamine.
The preparation method of described ultra-fine coal ash based composite mineral blending material may further comprise the steps:
(1) by proportioning, each component of exciting agent is dissolved in the stable solution of formation in the carrier water;
(2) utilize ultra-fine milling system flyash to be carried out add in the process of grinding exciting agent solution, with the flyash grinding that is mixed with exciting agent to the technical indicator that requires: granularity accounts for more than 90% less than the particle of 5 μ m, and specific surface area is 1000m
2/ kg ± 100m
2/ kg;
(3) adding fineness then by weight is 450m
2/ kg ± 50m
2The slag powders of/kg stirs in stirrer, obtains product.
The invention has the beneficial effects as follows: ultra-fine coal ash based mineral composite admixture of the present invention, mainly start with from granularity optimization aspect, make the whole cementitious material system of concrete batching, realize the maximization of compaction rate as far as possible, because the fly ash grain more than 90% makes cementitious material system not lack fine particle all less than 5 μ m, therefore when the preparation high-strength high-performance concrete, no longer need to add the silicon ash, saved concrete preparation cost greatly.Simultaneously, owing to be used in combination exciting agent, make the early age strength of concrete of being prepared by this mineral admixture to compare favourably with the concrete that uses the silicon ash, later stage intensity then can surpass the concrete that uses the silicon ash.In addition, superfined flyash involved in the present invention, be different from the superfined flyash that adopts sorting process and obtain, when adopting sorting method since the superfined flyash quantity of selecting seldom, sorting cost height, remaining meal coal ash also needs secondary treatment, and the superfined flyash that the present invention uses, obtain by the grinding mode, all original state flyash all can be utilized, the original state flyash that is used for grinding can be the cinder that can not be directly used in concrete.
Embodiment
Ultra-fine coal ash based composite mineral blending material of the present invention comprises the component of following weight proportion:
Specific surface area is 1000m
2/ kg ± 100m
2100 parts of the superfined flyashs of/kg
Fineness is 450m
2/ kg ± 50m
210～60 parts of the slag powders of/kg
5 ‰ of the total stuff amount of exciting agent superfined flyash and slag powders～8 ‰
Described exciting agent is mixed by 10～30 parts of saccharans, 10～30 parts of sodium-acetates, 10～30 parts of alkanolamines and 10～70 parts of carrier water by weight.
Described superfined flyash is to be directly used in concrete meal coal ash, and is levigate to accounting for more than 90% of size composition less than the particle of 5 μ m.
The degree of compactness of described ultra-fine coal ash based composite mineral blending material is more than 0.65.
The molecular-weight average of described saccharan is between 10000～30000.
Described alkanolamine is one or more the mixing in trolamine, diethanolamine, Monoethanolamine MEA BASF, the tri-isopropanolamine.
The preparation method of described ultra-fine coal ash based composite mineral blending material may further comprise the steps:
(1) by proportioning, each component of exciting agent is dissolved in the stable solution of formation in the carrier water;
(2) utilize ultra-fine milling system flyash to be carried out add in the process of grinding exciting agent solution, with the flyash grinding that is mixed with exciting agent to the technical indicator that requires: granularity accounts for more than 90% less than the particle of 5 μ m, and specific surface area is 1000m
2/ kg ± 100m
2/ kg;
(3) adding fineness then by weight is 450m
2/ kg ± 50m
2The slag powders of/kg stirs in stirrer, obtains product.
Below in conjunction with specific embodiment the present invention is described in further detail:
Embodiment 1
(1) takes by weighing 1.875g saccharan (molecular-weight average is 20000), 1.875g sodium-acetate, 0.75g trolamine, be dissolved in the stable exciting agent solution of formation in the 3g water;
(2) 1000g flyash is carried out adding in the process of grinding the above-mentioned 7.5g exciting agent solution that makes, utilize flyash grinding that ultra-fine milling system will be mixed with exciting agent to the technical indicator that requires: granularity accounts for more than 90% less than the particle of 5 μ m, and specific surface area is 1000m
2/ kg ± 100m
2/ kg;
(3) adding fineness then is 450m
2/ kg ± 50m
2The slag powders 500g of/kg stirs in stirrer, obtains product, and the degree of compactness of product is 0.66.
Embodiment 2
The preparation method fills a prescription to the coal ash consumption is 1000g with embodiment 1, and fineness is 450m
2/ kg ± 50m
2The slag powders amount of/kg is 200g.The exciting agent consumption is 9.6g, and exciting agent is by 2.88g saccharan (molecular-weight average is 30000), and 2.88g sodium-acetate, 0.96g trolamine, 0.96g tri-isopropanolamine and 1.92g water are formed.The degree of compactness that obtains product is 0.68.
Table 1,2 concrete manifestations of in concrete, using for the foregoing description.
Table-1 W/C is all one group of concrete performance of 0.33
Annotate: concrete mix is: gelling material 510kg/m
3: sand 714kg/m
3: rubble 1028kg/m
3
Table 2 water reducer volume is all one group of concrete performance of 0.8%
Annotate: concrete mix is: gelling material 500kg/m
3: sand 575kg/m
3: rubble 1225kg/m
The molecular-weight average of certain described saccharan between 10000～30000 all can, described alkanolamine can be one or more the mixing in trolamine, diethanolamine, Monoethanolamine MEA BASF, the tri-isopropanolamine.
The ultra-fine coal ash based composite mineral blending material that the present invention relates to is to be composited the specific surface area 1000m of superfined flyash by superfined flyash and slag powders and exciting agent
2/ kg ± 100m
2/ kg, the specific surface area 450m of slag powders
2/ kg ± 50m
2/ kg, slag powders is 0.1～0.6 times of superfined flyash weight by weight, the exciting agent consumption is 5 ‰ of total powder amount～8 ‰.Described superfined flyash granularity accounts for more than 90% less than the amount of 5 μ m.Described exciting agent is mixed by 10～30 parts of saccharans, 10～30 parts of sodium-acetates, 10～30 parts of alkanolamines and 10～70 parts of carrier water by weight, this exciting agent can make the early activity index of ultra-fine coal ash based mineral admixture improve more than 10%, and the later stage activity index improves more than 5%.The volume of mineral admixture of the present invention in concrete is 15～30%, and optimum volume is 20%.Described ultra-fine coal ash based composite mineral blending material preparation method is as follows: at first each component of exciting agent is dissolved in the stable solution of formation in the carrier water, utilizing ultra-fine milling system flyash to be carried out add in the process of grinding exciting agent solution, to be mixed with the flyash grinding of exciting agent to the technical indicator that requires, the last slag powders that meets fineness requirement that adds again stirs in stirrer.
Taken into full account superfined flyash and scoriaceous combinations of particle sizes relation in the technology of the present invention, have very high powder and pile up degree of compactness, in the concrete process of mix, form good particle coupling together with cement, meet of the optimum size distribution requirement of modern concrete technology to cementitious material system, the porosity of system is reduced, because flyash is fully ground, porous vitreum material wherein and some macrobeads in irregular shape are cracked, discharge the littler spherical microballon of more size, these factors cause the water requirement of cementitious material system to reduce, workability improves greatly, can play the effect of diminishing 10%.Modern concrete all is mixed with high efficiency water reducing agent, and by means of the effect of high efficiency water reducing agent, small microballons a large amount of in the ultra-fine coal ash based mineral admixture are able to abundant dispersion, play the effect of ball, is that workability of concrete is able to significantly another major cause.Simultaneously, because these molecules have passed through sufficient grinding, structure own is dense, and is very little to the absorption of water reducer, makes the concrete slump lose hardly.Although the use of superfined flyash mineral admixture can make concrete compaction rate be greatly improved, the later strength of maturing is also fine, but concrete early strength is compared shortcoming to some extent with the concrete that uses the silicon ash, so used exciting agent.The exciting agent that the present invention uses is the hydration characteristics in cement at flyash and slag compound system, and preferred formula combination can obviously improve the early activity of this Additive, reaches the purpose that improves early age strength of concrete.
In sum, content of the present invention is not limited in the above-described embodiment, and the technician in the same area can propose other embodiment easily within technical director's thought of the present invention, but this embodiment comprises within the scope of the present invention.
Claims (6)
1. ultra-fine coal ash based composite mineral blending material comprises the component of following weight proportion:
Specific surface area is 1000m
2/ kg ± 100m
2100 parts of the superfined flyashs of/kg
Fineness is 450m
2/ kg ± 50m
210～60 parts of the slag powders of/kg
5 ‰ of the total stuff amount of exciting agent superfined flyash and slag powders～8 ‰
Described exciting agent is mixed by 10～30 parts of saccharans, 10～30 parts of sodium-acetates, 10～30 parts of alkanolamines and 10～70 parts of carrier water by weight.
2. ultra-fine coal ash based composite mineral blending material according to claim 1 is characterized in that, described superfined flyash is to be directly used in concrete meal coal ash, and is levigate to accounting for more than 90% of size composition less than the particle of 5 μ m.
3. ultra-fine coal ash based composite mineral blending material according to claim 1 is characterized in that, the degree of compactness of described ultra-fine coal ash based composite mineral blending material is more than 0.65.
4. ultra-fine coal ash based composite mineral blending material according to claim 1 is characterized in that the molecular-weight average of described saccharan is between 10000～30000.
5. ultra-fine coal ash based composite mineral blending material according to claim 1 is characterized in that, described alkanolamine is one or more the mixing in trolamine, diethanolamine, Monoethanolamine MEA BASF, the tri-isopropanolamine.
6. the preparation method of the described ultra-fine coal ash based composite mineral blending material of claim 1 may further comprise the steps:
(1) by proportioning, each component of exciting agent is dissolved in the stable solution of formation in the carrier water;
(2) utilize ultra-fine milling system flyash to be carried out add in the process of grinding exciting agent solution, with the flyash grinding that is mixed with exciting agent to the technical indicator that requires: granularity accounts for more than 90% less than the particle of 5 μ m, and specific surface area is 1000m
2/ kg ± 100m
2/ kg;
(3) adding fineness then by weight is 450m
2/ kg ± 50m
2The slag powders of/kg stirs in stirrer, obtains product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101518972A CN101367631B (en) | 2008-09-27 | 2008-09-27 | Ultra-fine coal ash based composite mineral blending material and manufacturing method thereof |
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|---|---|---|---|
| CN2008101518972A CN101367631B (en) | 2008-09-27 | 2008-09-27 | Ultra-fine coal ash based composite mineral blending material and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101367631A true CN101367631A (en) | 2009-02-18 |
| CN101367631B CN101367631B (en) | 2012-11-21 |
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Cited By (15)
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|---|---|---|---|---|
| CN102531456A (en) * | 2012-03-13 | 2012-07-04 | 济南高新区工业废弃物利用研发中心 | Calcination-free industrial gypsum byproduct dry-mixed mortar activator |
| CN104211317A (en) * | 2014-09-10 | 2014-12-17 | 江苏名和集团有限公司 | Reinforcing steel bar corrosion inhibiting agent for concrete |
| CN104370486A (en) * | 2013-08-16 | 2015-02-25 | 山西华通蓝天环保有限公司 | Preparation technology and application of high performance composite material activated superfine fly ash |
| CN106587686A (en) * | 2016-12-15 | 2017-04-26 | 云南省建设投资控股集团有限公司 | Metakaolin-based high-performance concrete composite admixture and application thereof |
| CN110407492A (en) * | 2019-08-21 | 2019-11-05 | 山东鲁碧建材有限公司 | A kind of modified superfine fly ash aggregate |
| CN111548034A (en) * | 2020-06-19 | 2020-08-18 | 中山大学 | Auxiliary cementing material utilizing circulating fluidized bed fly ash and preparation method thereof |
| CN111689701A (en) * | 2020-06-19 | 2020-09-22 | 中山大学 | Electric furnace steel slag-based cement admixture or concrete admixture, preparation method and application |
| CN112811841A (en) * | 2021-01-14 | 2021-05-18 | 何振华 | Formula and production process for producing micro-expansion high-performance concrete and cement admixture by using aluminum ash |
| CN113024143A (en) * | 2021-01-14 | 2021-06-25 | 何振华 | Formula and production process for producing high-performance concrete and cement admixture by utilizing fly ash |
| CN113200700A (en) * | 2021-06-17 | 2021-08-03 | 福建富润建材科技股份有限公司 | Mineral powder reinforcing agent containing alkanolamine and application thereof |
| CN114436549A (en) * | 2022-03-07 | 2022-05-06 | 西安建筑科技大学 | Quick-setting high-alkali-activated fly ash cementing material capable of being cured at normal temperature and preparation method thereof |
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| WO2022248442A1 (en) * | 2021-05-26 | 2022-12-01 | Chryso | Improved workability retention in low-clinker hydraulic compositions |
| CN115490449A (en) * | 2022-10-07 | 2022-12-20 | 江苏金木土科技有限公司 | Preparation method of superfine mineral admixture |
| CN115707669A (en) * | 2021-08-18 | 2023-02-21 | 攀枝花市航盛资源再生科技有限责任公司 | Method for producing concrete composite mineral admixture |
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| CN102531456A (en) * | 2012-03-13 | 2012-07-04 | 济南高新区工业废弃物利用研发中心 | Calcination-free industrial gypsum byproduct dry-mixed mortar activator |
| CN104370486A (en) * | 2013-08-16 | 2015-02-25 | 山西华通蓝天环保有限公司 | Preparation technology and application of high performance composite material activated superfine fly ash |
| CN104370486B (en) * | 2013-08-16 | 2016-12-28 | 山西华通蓝天环保有限公司 | High-performance composite materials activation superfined flyash preparation technology and application |
| CN104211317A (en) * | 2014-09-10 | 2014-12-17 | 江苏名和集团有限公司 | Reinforcing steel bar corrosion inhibiting agent for concrete |
| CN106587686A (en) * | 2016-12-15 | 2017-04-26 | 云南省建设投资控股集团有限公司 | Metakaolin-based high-performance concrete composite admixture and application thereof |
| CN110407492A (en) * | 2019-08-21 | 2019-11-05 | 山东鲁碧建材有限公司 | A kind of modified superfine fly ash aggregate |
| CN111548034B (en) * | 2020-06-19 | 2022-01-11 | 中山大学 | Auxiliary cementing material utilizing circulating fluidized bed fly ash and preparation method thereof |
| CN111548034A (en) * | 2020-06-19 | 2020-08-18 | 中山大学 | Auxiliary cementing material utilizing circulating fluidized bed fly ash and preparation method thereof |
| CN111689701A (en) * | 2020-06-19 | 2020-09-22 | 中山大学 | Electric furnace steel slag-based cement admixture or concrete admixture, preparation method and application |
| CN112811841A (en) * | 2021-01-14 | 2021-05-18 | 何振华 | Formula and production process for producing micro-expansion high-performance concrete and cement admixture by using aluminum ash |
| CN113024143A (en) * | 2021-01-14 | 2021-06-25 | 何振华 | Formula and production process for producing high-performance concrete and cement admixture by utilizing fly ash |
| FR3123350A1 (en) * | 2021-05-26 | 2022-12-02 | Chryso | Improved workability retention of hydraulic compositions with low clinker content |
| WO2022248442A1 (en) * | 2021-05-26 | 2022-12-01 | Chryso | Improved workability retention in low-clinker hydraulic compositions |
| CN113200700A (en) * | 2021-06-17 | 2021-08-03 | 福建富润建材科技股份有限公司 | Mineral powder reinforcing agent containing alkanolamine and application thereof |
| CN115707669A (en) * | 2021-08-18 | 2023-02-21 | 攀枝花市航盛资源再生科技有限责任公司 | Method for producing concrete composite mineral admixture |
| CN114436549A (en) * | 2022-03-07 | 2022-05-06 | 西安建筑科技大学 | Quick-setting high-alkali-activated fly ash cementing material capable of being cured at normal temperature and preparation method thereof |
| CN114455919A (en) * | 2022-03-07 | 2022-05-10 | 福建三宝钢铁有限公司 | Ultrafine steel slag powder gel and method for preparing concrete by using same |
| CN114455919B (en) * | 2022-03-07 | 2022-12-06 | 福建三宝钢铁有限公司 | Ultrafine steel slag powder gel and method for preparing concrete by using same |
| US11834381B2 (en) | 2022-03-07 | 2023-12-05 | Xi'an University Of Architecture And Technology | Room temperature curable quick-setting high-strength alkali-activated fly ash cementitious material and preparation method thereof |
| CN115490449A (en) * | 2022-10-07 | 2022-12-20 | 江苏金木土科技有限公司 | Preparation method of superfine mineral admixture |
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|---|---|
| CN101367631B (en) | 2012-11-21 |
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