CN107555896A - It is a kind of to excite slag and the standby admixture of coal ash for manufacturing and the high-strength concrete prepared using admixture with waterglass - Google Patents
It is a kind of to excite slag and the standby admixture of coal ash for manufacturing and the high-strength concrete prepared using admixture with waterglass Download PDFInfo
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- CN107555896A CN107555896A CN201710719682.5A CN201710719682A CN107555896A CN 107555896 A CN107555896 A CN 107555896A CN 201710719682 A CN201710719682 A CN 201710719682A CN 107555896 A CN107555896 A CN 107555896A
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- slag
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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Abstract
The invention provides a kind of slag and the standby admixture of coal ash for manufacturing and the high-strength concrete prepared using admixture are excited with waterglass.The high-strength concrete is in terms of every cubic metre of mass fraction, including following component：Binder materials：500 ~ 700 parts of cement；100 ~ 300 parts of water；50 ~ 210 parts of concrete admixture；1000 ~ 1200 parts of building stones；600 ~ 800 parts of sand；10 ~ 25 parts of water reducer；40 ~ 60 parts of waterglass；The concrete admixture is slag and flyash, and the mass ratio of slag and flyash is（5.5~6.5）︰（3.5~4.5）.Simple production process of the present invention, flyash and the compound admixture as high-strength concrete of slag are excited by the use of waterglass, the effect singly mixed respectively both when being not only substantially better than no exciting agent, and early strength activity is not less than 102%, and later strength activity can be more than 112%；Raw material of the present invention is cheap, has both alleviated the pressure that high-strength concrete is supplied silicon ash and ultrafine slag powder, has improved the efficiency of slag or flyash as admixture again, meet the needs of sustainable development.
Description
Technical field
The present invention relates in building material technical field, slag and fine coal are excited with waterglass more particularly, to one kind
Admixture and the high-strength concrete using admixture preparation prepared by ash.
Background technology
With the development of modern cement concrete technology, high-strength, high-durability has become the important hair of concrete material
Open up direction.The characteristics of high-strength and high durability concrete is with high, strong, excellent in durability of non-deformability of its compression strength etc.,
Building trade has obtained large-scale application.High-strength and high durability concrete generally requires incorporation admixture, also simultaneously to mixing
Close material and require higher.Current high-strength and high durability concrete admixture is mostly using silicon ash, ultrafine slag, and such admixture is certainly
Body resource-constrained, and cost is higher, production power consumption is larger.Therefore, exploiting natural resources, more, cost is cheap and production power consumption is smaller
Admixture be concrete admixture research emphasis.
The slag metallurgical slag main as steel and iron industry industry, how to improve its added value is wanting for sustainable development proposition
Ask.In slag containing it is more with Portland clinker similar in mineralogical composition, possess the mineral base as admixture, will
It meets sustainable development requirement as admixture, however, slag as admixture except exist the problems such as stability with
Outside, vivacity is relatively low and limits one of the reason for it is as admixture large-scale application.Flyash is as industry byproduct
One kind, it receives the influence of its forming process as the activity of concrete admixture, at present commerical ready-mixed concrete preparation process
In it is more using flyash as admixture, for its volume generally between 15%~30%, substantial amounts of demand causes flyash to supply
It is at full stretch, along with flyash high-quality resource is inherently limited, therefore how to integrate and effectively utilize flyash room imperative
's.As the flyash of siliceous admixture, its with slag is compound is used as admixture, its can absorb the free calcium oxide in slag and
Overcome the bad problem of slag stability that may be present, and the free calcium oxide and its hydrated product calcium hydroxide in slag are same
Also can be as the exciting agent of coal ash secondary hydration reaction, the two compound use possesses the basic condition to solve the above problems, because
This, completely can be using compound as admixture, to reach the requirement of economy and sustainable development by rational technological means.
At present, the activity excitation method both at home and abroad on the mineral admixture such as flyash and slag, slag mainly has physics
Fine grinding, singly mix chemical activator plus Calcium treatment etc..By numerous studies it is found that flyash and comminuted steel shot, the activity of miberal powder exist
It can be excited in alkaline medium or acid medium, particularly alkaline medium, while also find some and excite flyash and steel
The method and approach of powder activity, but exist be difficult to it is quick, fully and the problem of economically excite its active, show flyash and
Comminuted steel shot moulded products early strength is than relatively low.Therefore find and excite flyash and comminuted steel shot activity optimization method, turn into present mineral
The important topic made full use of.
The content of the invention
It is a first objective of the present invention to provide a kind of slag and the standby admixture of coal ash for manufacturing are excited with waterglass.
It is a further object of the present invention to provide high-strength concrete prepared by a kind of admixture.
The present invention is on the basis of a kind of comminuted steel shot powder-pulverized fuel ash cement sill is developed, for this kind of cement-based material,
The method combined to the fine grinding of flyash physics and addition waterglass chemical activator is taken, further passes through experimental study fine coal
When ash, comminuted steel shot substitute cement cementitious material making light energy-saving concrete segment, Water glass content is to flyash, comminuted steel shot and cement
The problems such as influence of the gelling system mechanical property of composition and flyash, the comminuted steel shot activity excitation mechanism of action.
The present invention is achieved through the following technical solutions above-mentioned technical purpose：
A kind of high-strength concrete, in terms of every cubic metre of mass fraction, the high-strength concrete includes following component：Be gelled material
500~700 parts of material；100~300 parts of water；50~210 parts of concrete admixture；1000~1200 parts of building stones；Sand 600~800
Part；10~25 parts of water reducer；40~60 parts of waterglass；The concrete admixture is slag and flyash, slag and flyash
Mass ratio be (5.5~6.5)：(3.5~4.5).
The present invention by the use of waterglass excite flyash and slag it is compound be used as concrete admixture, its cost is cheap, product imitate
Fruit is notable, mutually excites, and plays preferable coordinating effect, high-strength concrete service behaviour is improved, and early strength
Preferably ensured.
Preferably, the ratio of mud of the high-strength concrete is 0.25~0.35.
Preferably, concrete admixture accounts for the 10%-30% of binder total amount.
Preferably, it is characterised in that binder materials is cement.
Preferably, the slag is the vexed slag of splendid steel heat, and specific surface area is 500~600m2/kg。
Preferably, the chemical composition of the slag by percentage to the quality, CaO, SiO in slag2, FeO and MgO content
Sum is not less than 75%, and CaO content is not less than 45%.
Preferably, the slag includes following component by mass percentage：CaO 47.15%；SiO211.09%；
FeO 11.13%；MgO 7.69%.
Preferably, the slag includes following component by mass percentage：CaO 47.15%；SiO211.09%；
Al2O31.97%；Fe2O36.51%；FeO 11.13%；MgO 7.69%；MnO 4.95%；P2O50.64%；SO3
0.43%.
Preferably, the flyash is II grade of flyash.
Preferably, the chemical composition of flyash by percentage to the quality, SiO2And Al2O3Content is not less than 80%.
Preferably, the flyash includes following component by mass percentage：SiO252.66%；CaO
3.62%；MgO 1.10%；Fe2O36.33%；Al2O331.03%.
It is above-mentioned to excite flyash and the compound method that high-strength concrete is prepared as admixture of slag, its side by the use of waterglass
Method is in accordance with the following methods：Composite blend is substituted to 10%~30% cement for accounting for binder materials gross mass, then configuration is high
Reinforced concrete.
The present invention principle be：Ground steel slag is compound with flyash, and steel-making slag powder specific surface area is compared with two used in one side
Person is small with cement, can provide more excellent grain composition so that concrete reaches more preferable dense state；On the other hand
The siliceous materials such as flyash can reduce the C/S ratios of slag blending binder materials so that the eakleite generation in hydrated product
Amount increase, the intensity for showing as Behavior of Hardened Cement Paste improves, in addition, SiO in flyash2It can be generated as serpentine class etc. with MgO, FeO etc.
Hydrated product, and this kind of hydrated product itself just possesses higher intensity.It is compound with slag in mutually coordinated aspect, flyash
As admixture, one side flyash can absorb the free calcium oxide in slag and overcome slag stability that may be present bad
Problem, free calcium oxide and its hydrated product calcium hydroxide in another aspect slag equally can also be used as coal ash secondary aquation
The exciting agent of reaction.The two is compound to have higher practical value.And waterglass is a kind of alkali-activator, flyash, comminuted steel shot
Their activity can be effectively excited after cement-based material addition waterglass.When waterglass dosage is less (relative to binder materials
For, its volume be less than 5%) when, its hydrolyze generation siliceous colloid it is limited, the amount of OH-ion is few, although part
OH-ion can enter slurry inside but be diffused into mineral admixture surface meeting it is seldom.The concentration of OH-ion is little, it is impossible to
It is broken Si-O, Al-O key in mineral admixture vitreum, vitreum also will not fully disintegrate afterwards, then there will be no fill
Ca2+, Mg2+ and silicon oxyanion group dissolution divided, generates network-like gelinite.Therefore, scattered mineral admixture particle
It can not be operatively connected, the mechanical property of slurry cannot effectively improve, and the compression strength of building block improves degree
Will not be obvious.
Compared with prior art, the invention has the advantages that and beneficial effect：
1. simple production process of the present invention, only by the vexed slag of heat by broken and levigate its specific surface area need to be made to reach 500
~600m2/ kg, in addition waterglass laser printer agent, flyash will be excited by the use of waterglass and slag is compound is used as high-strength coagulation
The admixture of soil, the effect singly mixed respectively both when being not only substantially better than no exciting agent, and also early strength activity is not less than
102%, later strength activity can be more than 112%；
2. the composite blend of the present invention has multiple functions, in addition to function is strengthened, also there is the peace for improving binder materials
The features such as qualitative, working performance of concrete；
3. raw material of the present invention is cheap, easily obtains, the pressure that high-strength concrete is supplied silicon ash and ultrafine slag powder had both been alleviated
Power, the efficiency of slag or flyash as admixture is improved again, meet the needs of sustainable development.
Embodiment
The present invention is further illustrated below in conjunction with specific embodiment, gives part detailed embodiment in embodiment
With specific operating process.Unless stated otherwise, the reagent of the invention used, method and apparatus routinely try for the art
Agent, method and apparatus.
Embodiment 1：
The preparation process of composite blend：After the vexed slag mechanical grinding of splendid steel heat, obtain specific surface area for 500~
600m2/ kg steel-making slag powder, by its with Dongguan Humen Sha Jiao power plant II grade of flyash of standard with 6:4 is compound, produces complex mixture
Material, is designated as GF, the chemical composition of slag and flyash see the table below 1 to table 2 respectively in embodiment.
The slag chemical composition (%) of table 1
The flyash chemical composition (%) of table 2
GF made above is used to prepare high-strength concrete, water is replaced with 20% GF that quality is binder materials quality
Mud；Cement is the PO42.5R Portland cements of Yingde, Guangdong conch cement Co., Ltd production；Fine aggregate is flower
All area Tan Bu towns new capital sandstone factory north rivers sand, modulus of fineness Mx=2.84, clay content 0.9%；Coarse aggregate is Zengcheng stone field production 5
~10mm Guamishis and Daya Gulf stone field production 5~20mm rubble two-stages coarse aggregate are with synthesis 5~20mm continuously graded aggregates；Diminishing
Agent is section's outstanding person's KJ-JS polycarboxylate high performance water-reducing agents.Waterglass presses total binder materials quality according to related article experience, dosage
9%, water-cement ratio 0.3.
The match ratio of the concrete is shown in Table 3, is mixed respectively at water purification cement concrete, the slag for singly mixing equal volume, flyash
Solidifying soil contrast.The service behaviour of the concrete of preparation and each age compression strength are shown in Table 4.
The concrete mix of table 3
The working performance of concrete of table 4 and compression strength
From result of the test table 4, replaced with the slag and flyash composite blending material of the present invention under 0.3 water-cement ratio
20% portland cement, the high-strength concrete 7d intensity activities being prepared reach 112%, 28d intensity activities and reached
110%, 90d intensity activity reach 112%.Compared to waiting volume singly to mix slag or flyash, using the compound prescription of the present invention,
Its intensity activity singly mixed can be significantly improved.Compared to for the slag situation (NO.2 groups) for singly mixing equal volume, this hair is utilized
Bright compound prescription, 7d intensity improve 1MPa, and 28d intensity improves 6.03MPa, and 90d intensity improves 9.24MPa；Compare
For the flyash situation (NO.3 groups) for singly mixing equal volume, using the compound prescription of the present invention, 7d intensity improves
5.69MPa, 28d intensity improve 8.11MPa, and 90d intensity improves 9.7MPa.In addition, using the compound prescription of the present invention, mix
The service behaviour for coagulating soil is also improved.
Embodiment 2
GF prepared by embodiment 1 is replaced into cement with 30% GF that quality is binder materials quality；Cement is Guangdong English
The PO42.5R Portland cements of moral conch cement Co., Ltd production；Fine aggregate is Huadu District Tan Bu towns new capital
Sandstone factory north rivers sand, modulus of fineness Mx=2.84, clay content 0.9%；Coarse aggregate be Zengcheng stone field produce 5~10mm Guamishis and
Daya Gulf stone field production 5~20mm rubble two-stages coarse aggregate is with synthesis 5~20mm continuously graded aggregates；Water reducer is section outstanding person KJ-JS
Polycarboxylate high performance water-reducing agent.
The match ratio of the concrete is shown in Table 5, is mixed respectively at water purification cement concrete, the slag for singly mixing equal volume, flyash
Solidifying soil contrast.The service behaviour of the concrete of preparation and each age compression strength are shown in Table 6.
The concrete mix of table 5
The working performance of concrete of table 6 and compression strength
From result of the test table 4, replaced with the slag and flyash composite blending material of the present invention under 0.22 water-cement ratio
30% portland cement, the high-strength concrete 7d intensity activities being prepared reach 102%, 28d intensity activities and reached
107%, 90d intensity activity reach 108%.Compared to waiting volume singly to mix slag or flyash without exciting agent, utilize the present invention's
Compound prescription, its intensity activity singly mixed can be significantly improved.Compared to for the slag situation (NO.2 groups) for singly mixing equal volume,
Using the compound prescription of the present invention, 7d intensity improves 6.55MPa, and 28d intensity improves 11.84MPa, and 90d intensity improves
17.84MPa；Compared to for the flyash situation (NO.3 groups) for singly mixing equal volume, the compound prescription of the present invention, 7d intensity are utilized
14.04MPa is improved, 28d intensity improves 14.95MPa, and 90d intensity improves 15.64MPa.In addition, utilize the present invention's
Compound prescription, the service behaviour of concrete are also improved.
Above-mentioned embodiment is only the preferred embodiment of the present invention, it is impossible to the scope of protection of the invention is limited with this,
The change and replacement for any unsubstantiality that those skilled in the art is done on the basis of the present invention belong to institute of the present invention
Claimed scope.
Claims (10)
1. a kind of high-strength concrete, it is characterised in that in terms of every cubic metre of mass fraction, the high-strength concrete includes such as the following group
Point：500 ~ 700 parts of binder materials；100 ~ 300 parts of water；50 ~ 210 parts of concrete admixture；1000 ~ 1200 parts of building stones；Sand
600 ~ 800 parts；10 ~ 25 parts of water reducer；40 ~ 60 parts of waterglass；The concrete admixture is slag and flyash, slag and
The mass ratio of flyash is（5.5~6.5）：（3.5~4.5）.
2. high-strength concrete according to claim 1, it is characterised in that the ratio of mud of the high-strength concrete be 0.25 ~
0.35。
3. high-strength concrete according to claim 1, it is characterised in that concrete admixture accounts for binder total amount
10%-30%。
4. high-strength concrete according to claim 3, it is characterised in that binder materials is cement.
5. high-strength concrete according to claim 1, it is characterised in that the slag is the vexed slag of splendid steel heat, compares surface
Product is 500 ~ 600 m2/kg。
6. high-strength concrete according to claim 1 or 5, it is characterised in that the chemical composition of the slag is with quality hundred
Divide than counting, CaO, SiO in slag2, FeO and MgO content sum be not less than 75%, and CaO content is not less than 45%.
7. high-strength concrete according to claim 6, it is characterised in that the slag include it is following by mass percentage
Component：CaO 47.15%；SiO2 11.09%；FeO 11.13%；MgO 7.69%.
8. high-strength concrete according to claim 7, it is characterised in that the slag include it is following by mass percentage
Component：CaO 47.15%；SiO2 11.09%；Al2O31.97%；Fe2O36.51%；FeO 11.13%；MgO 7.69%；MnO
4.95%；P2O50.64%；SO3 0.43%。
9. high-strength concrete according to claim 1, it is characterised in that the flyash is II grade of flyash, flyash
Chemical composition by percentage to the quality, SiO2And Al2O3Content is not less than 80%.
10. high-strength concrete according to claim 9, it is characterised in that the flyash includes pressing quality percentage below
Than the component of meter： SiO2 52.66%；CaO 3.62%； MgO 1.10%；Fe2O36.33%；Al2O331.03%。
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| CN201710719682.5A CN107555896A (en) | 2017-08-21 | 2017-08-21 | It is a kind of to excite slag and the standby admixture of coal ash for manufacturing and the high-strength concrete prepared using admixture with waterglass |
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| CN201710719682.5A CN107555896A (en) | 2017-08-21 | 2017-08-21 | It is a kind of to excite slag and the standby admixture of coal ash for manufacturing and the high-strength concrete prepared using admixture with waterglass |
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Cited By (6)
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| CN109987903A (en) * | 2019-04-29 | 2019-07-09 | 中交二公局东萌工程有限公司 | A kind of blast-furnace cinder powder concrete applied on highway |
| CN110054448A (en) * | 2019-05-24 | 2019-07-26 | 重庆交通职业学院 | A kind of environmental-friendly conductive concrete with and its preparation method and application |
| CN112094085A (en) * | 2020-08-20 | 2020-12-18 | 河南兴达商砼有限公司 | High-strength concrete and production process thereof |
| CN114276081A (en) * | 2021-12-23 | 2022-04-05 | 福建省深宝建材有限公司 | Steel slag-containing concrete and preparation method thereof |
| CN114477805A (en) * | 2021-12-20 | 2022-05-13 | 广东华欣环保科技有限公司 | Early-strength steel slag cementing material |
| CN114772966A (en) * | 2022-04-20 | 2022-07-22 | 朱娜 | Composite admixture for concrete and production method thereof |
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| CN109987903A (en) * | 2019-04-29 | 2019-07-09 | 中交二公局东萌工程有限公司 | A kind of blast-furnace cinder powder concrete applied on highway |
| CN110054448A (en) * | 2019-05-24 | 2019-07-26 | 重庆交通职业学院 | A kind of environmental-friendly conductive concrete with and its preparation method and application |
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| CN114276081A (en) * | 2021-12-23 | 2022-04-05 | 福建省深宝建材有限公司 | Steel slag-containing concrete and preparation method thereof |
| CN114772966A (en) * | 2022-04-20 | 2022-07-22 | 朱娜 | Composite admixture for concrete and production method thereof |
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Application publication date: 20180109 |