CN103803825A - Concrete additive - Google Patents
Concrete additive Download PDFInfo
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- CN103803825A CN103803825A CN201310703872.XA CN201310703872A CN103803825A CN 103803825 A CN103803825 A CN 103803825A CN 201310703872 A CN201310703872 A CN 201310703872A CN 103803825 A CN103803825 A CN 103803825A
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- slag
- surface area
- specific surface
- concrete admixture
- fluid bed
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Abstract
The invention discloses a concrete additive which is formed by mixing the following materials in percentage by mass: 10-15% of circulating fluidized bed fly ash, 15-20% of steel slag and 65-75% of mineral powder. According to the concrete additive disclosed by the invention, the gypsum and CaO in the circulating fluidized bed fly ash and steel slag react with active components in the mineral powder, and the early and late activity of the additive is good due to the mutual trigger action; moreover, the circulating fluidized bed fly ash, steel slag and water quenching granulated blast-furnace slag are ground to different fineness, thus echelon reaction among the components and close packing of the particles are realized.
Description
Technical field
The present invention relates to a kind of concrete admixture, belong to building material field.
Background technology
Along with the further reinforcement of environmental protection requirement, the comprehensive utilization of various trade wastes has obtained paying close attention to widely.High-quality fly ash and breeze are in the widespread use of cement concrete industry and become scarce resource, but circulating fluidized bed (circulating fluidized bed combustion, CFBC) flyash and steel slag utilization rate are always very low, still environment are caused to white elephant.
Circulating fluid bed coal ash is all different from ordinary fly ash in chemical constitution, mineral composition, performance performance, and major part does not all meet existing technological standard and operating specification, thereby is difficult to directly be applied in cement concrete.CFBC flyash has that particle is thick, pattern is irregular, f-CaO and SO
3content is high, and using anhydrite and lime as features such as essential mineral compositions.Therefore, circulating fluid bed coal ash water requirement is large, active low, and easily causes cement concrete abnormal time of coagulation.
And another kind of industrial residue--slag, though applied for many years, but because slag exists the technical bottlenecks such as stability is bad, grindability is very poor, early activity is very low, thereby also fail large-scale application in cement concrete, the discharge of slag has still caused huge pressure to environment always.In order to solve the problems such as steel slag stability is bad, grindability is poor, early activity is low, many researchers and industrial enterprise improve constantly the fineness of slag micro powder, to improving its activity.But its fineness of raising simply can not effectively improve its reactive behavior.Because the excessive grinding of slag causes the energy consumption of slag processing high, increased slag processing cost on the contrary, made slag micro powder on market, lack price advantage, this has also limited promoting the use of of slag to a certain extent.
Summary of the invention
The object of the invention is: a kind of concrete admixture is provided, and comprehensive utilization trade waste, especially circulating fluid bed coal ash and slag, improve its economic worth, alleviates environmental pressure.
For achieving the above object, the technical solution that the present invention adopts is that this concrete admixture is made up of after mixing the material of following quality percentage composition: circulating fluid bed coal ash 10～15%; Slag 15～20%; Breeze 65～75%.
Wherein, the specific surface area of described circulating fluid bed coal ash is 500～550m
2/ Kg.
Wherein, the specific surface area of described slag is 200～250m
2/ Kg.
Wherein, described breeze refers to the powder that water quenching granulating blast-furnace slag is reached to regulation fineness through ball milling or Vertical Mill, and its specific surface area is 400～450m
2/ Kg.
Wherein, described slag is that basicity scope is 2.5～3.3 bessemer furnace slag.
Advantage of the present invention and effect are: the problem existing in application for circulating fluid bed coal ash and slag, abandon the thinking of a kind of industrial residue of individual curing in the past, utilize the feature of circulating fluid bed coal ash and slag self, by itself and breeze associated treatment, give full play to the synergistic effect of associated treatment, prepare that a kind of activity is high, the concrete admixture of excellent property, both reduced the production cost of adulterant, consume again a large amount of industrial residues, there is good Social benefit and economic benefit.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described, and these embodiment can not be interpreted as it is the restriction to technical solution of the present invention.
Detection method: to the activity test method of adulterant with reference to GB/T18046-2008 " for the GBFS of cement and concrete ".
Embodiment 1: adopt Vertical Mill mode by circulating fluid bed coal ash grinding to specific surface area 500m
2/ Kg; Adopt Vertical Mill mode that water quenching granulating ground granulated blast furnace slag is milled to specific surface area 430m
2/ Kg; Adopt Vertical Mill mode by steel slag grinding to specific surface area 200m
2/ Kg, the basicity of slag is 2.5; Three is mixed and made into concrete admixture by mass percentage, wherein circulating fluid bed coal ash 15%, slag 15%, breeze 70%.
Comparative example 1: breeze: adopt ball milling method that water quenching granulating ground granulated blast furnace slag is milled to specific surface area 420m
2/ Kg.
Implementation result sees the following form:
Anhydrite and lime content in circulating fluid bed coal ash are higher, and the CaO content in slag is also high, and the gypsum content in a lot of slags is not low yet, and these gypsum and CaO are easy to active ingredient in breeze (as SiO
2, Al
2o
3) reaction generation C-S-H gel, reaction formula is as follows:
CaO+H
2O=Ca(OH)
2；
CaSO
4+H
2O=CaSO
4·2H
2O；
SiO
2+xCa(OH)
2+H
2O=xCaO·SiO
2·H
2O；?A1
2O
3+yCa(OH)
2+H
2O=yCaO·A1
2O
3·H
2O；?yCaO·A1
2O
3·H
2O+CaSO
4·2H
2O+H
2O=zCaO·A1
2O
3·CaSO
4·H
2O。
Mutually exciting between these components make mixed product early activity and later stage activity all more satisfactory.By circulating fluid bed coal ash, slag, breeze respectively grinding be processed into several different particle size range, contribute to realize granular system tightly packed of this high-quality blended material.And due to circulating fluid bed coal ash phase commute mill, circulating fluid bed coal ash is processed into the particle of granularity minimum, contributes to anhydrite in circulating fluid bed coal ash and lime and breeze mutually to excite in early days in aquation, guaranteed the early activity of adulterant; Due to the more difficult grinding of slag, be processed into the particle of particle diameter maximum, contribute to slag to continue to provide calcium source excitation breeze aquation in the later stage, in addition, relatively thick slag makes the grain composition of whole adulterant more reasonable.Therefore the present invention makes adulterant is early stage, the later stage is active all high, and has utilized reluctant circulating fluid bed coal ash and slag, and slag is not done fine grinding processing yet, and whole material cost and production cost have all obtained significantly declining.
Embodiment 2: adopt ball milling method by circulating fluid bed coal ash grinding to specific surface area 550m
2/ Kg; Adopt ball milling method that water quenching granulating ground granulated blast furnace slag is milled to specific surface area 450m
2/ Kg; Adopt ball milling method by steel slag grinding to specific surface area 250m
2/ Kg, the basicity of slag is 3.3; Three is mixed and made into concrete admixture by mass percentage, wherein circulating fluid bed coal ash 10%, slag 20%, breeze 70%.
Comparative example 2: breeze: adopt ball milling method that water quenching granulating ground granulated blast furnace slag is milled to specific surface area 420m
2/ Kg.
Implementation result sees the following form:
Embodiment 3: adopt ball milling method by circulating fluid bed coal ash grinding to specific surface area 530m
2/ Kg; Adopt ball milling method that water quenching granulating ground granulated blast furnace slag is milled to specific surface area 400m
2/ Kg; Adopt ball milling method by steel slag grinding to specific surface area 230m
2/ Kg, the basicity of slag is 3.0; Three is mixed and made into concrete admixture by mass percentage, wherein circulating fluid bed coal ash 10%, slag 15%, breeze 75%.
Comparative example 3: breeze: adopt ball milling method that water quenching granulating ground granulated blast furnace slag is milled to specific surface area 420m
2/ Kg.
Implementation result sees the following form:
Embodiment 4: adopt ball milling method by circulating fluid bed coal ash grinding to specific surface area 520m
2/ Kg; Adopt ball milling method that water quenching granulating ground granulated blast furnace slag is milled to specific surface area 440m
2/ Kg; Adopt ball milling method by steel slag grinding to specific surface area 220m
2/ Kg, the basicity of slag is 2.8; Three is mixed and made into concrete admixture by mass percentage, wherein circulating fluid bed coal ash 12%, slag 23%, breeze 65%.
Comparative example 4: breeze: adopt ball milling method that water quenching granulating ground granulated blast furnace slag is milled to specific surface area 420m
2/ Kg.
Implementation result sees the following form:
Above-described embodiment is only explanation technical conceive of the present invention and feature, and its object is to allow person skilled in the art can understand content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalences that spirit is done according to the present invention change or modify, within all should being encompassed in protection scope of the present invention.
Claims (5)
1. concrete admixture, is characterized in that this concrete admixture is made up of after mixing the material of following quality percentage composition: circulating fluid bed coal ash 10～15%; Slag 15～20%; Breeze 65～75%.
2. concrete admixture according to claim 1, is characterized in that: the specific surface area of described circulating fluid bed coal ash is 500～550m
2/ Kg.
3. concrete admixture according to claim 1, is characterized in that: the specific surface area of described slag is 200～250m
2/ Kg.
4. concrete admixture according to claim 1, is characterized in that: described breeze refers to the powder that water quenching granulating blast-furnace slag is reached to regulation fineness through ball milling or Vertical Mill, and its specific surface area is 400～450m
2/ Kg.
5. according to the concrete admixture described in claim 1 or 3, it is characterized in that: described slag is the bessemer furnace slag of basicity scope 2.5～3.3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310703872.XA CN103803825A (en) | 2013-12-20 | 2013-12-20 | Concrete additive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310703872.XA CN103803825A (en) | 2013-12-20 | 2013-12-20 | Concrete additive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103803825A true CN103803825A (en) | 2014-05-21 |
Family
ID=50701272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310703872.XA Pending CN103803825A (en) | 2013-12-20 | 2013-12-20 | Concrete additive |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103803825A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106316185A (en) * | 2016-08-22 | 2017-01-11 | 湖南双友特材有限责任公司 | Concrete micro-expansion mineral admixture and preparation method thereof |
| CN106336155A (en) * | 2015-07-08 | 2017-01-18 | 新疆宇鑫混凝土有限公司 | High strength abrasion-resistant concrete |
| CN106810135A (en) * | 2015-11-30 | 2017-06-09 | 益阳市宏达新型建材有限公司 | A kind of concrete mineral admixture and the mortar containing it |
| CN106927708A (en) * | 2017-03-20 | 2017-07-07 | 陈亮 | Concrete novel extra material and its preparation method and application |
| CN107010862A (en) * | 2017-03-20 | 2017-08-04 | 陈亮 | Concrete novel extra material and its application |
| CN109987885A (en) * | 2017-12-29 | 2019-07-09 | 张大鹏 | The cementing building block of SFC and its manufacturing method |
| CN110028265A (en) * | 2019-03-13 | 2019-07-19 | 金泰成环境资源股份有限公司 | A kind of low viscous compact-type mineral admixture for concrete product |
| CN111620590A (en) * | 2020-06-19 | 2020-09-04 | 中山大学 | High-activity auxiliary cementing material for cement concrete and preparation method thereof |
| CN113213797A (en) * | 2021-04-09 | 2021-08-06 | 华南理工大学 | Steel slag and slag composite admixture and preparation method and application thereof |
| CN114538808A (en) * | 2022-03-14 | 2022-05-27 | 北京科技大学 | Circulating fluidized bed fly ash-based low-carbon cement and preparation method thereof |
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| JP2003055025A (en) * | 2001-06-08 | 2003-02-26 | Kawasaki Steel Corp | Hydrated hardened body |
| JP2003119068A (en) * | 2001-10-11 | 2003-04-23 | Chugoku Electric Power Co Inc:The | Hydration cured body |
| JP2008230869A (en) * | 2007-03-16 | 2008-10-02 | Chugoku Electric Power Co Inc:The | Concrete composition |
| CN101564866A (en) * | 2008-12-19 | 2009-10-28 | 福建工程学院 | Production technology for concrete building block of autoclaving and air entraining of circulating fluid bed fly ash |
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2013
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Patent Citations (4)
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| JP2003055025A (en) * | 2001-06-08 | 2003-02-26 | Kawasaki Steel Corp | Hydrated hardened body |
| JP2003119068A (en) * | 2001-10-11 | 2003-04-23 | Chugoku Electric Power Co Inc:The | Hydration cured body |
| JP2008230869A (en) * | 2007-03-16 | 2008-10-02 | Chugoku Electric Power Co Inc:The | Concrete composition |
| CN101564866A (en) * | 2008-12-19 | 2009-10-28 | 福建工程学院 | Production technology for concrete building block of autoclaving and air entraining of circulating fluid bed fly ash |
Non-Patent Citations (1)
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| 李丙明等: "钢渣-矿渣-粉煤灰复合微粉的活性试验研究", 《硅酸盐通报》 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106336155A (en) * | 2015-07-08 | 2017-01-18 | 新疆宇鑫混凝土有限公司 | High strength abrasion-resistant concrete |
| CN106810135A (en) * | 2015-11-30 | 2017-06-09 | 益阳市宏达新型建材有限公司 | A kind of concrete mineral admixture and the mortar containing it |
| CN106316185A (en) * | 2016-08-22 | 2017-01-11 | 湖南双友特材有限责任公司 | Concrete micro-expansion mineral admixture and preparation method thereof |
| CN106316185B (en) * | 2016-08-22 | 2018-01-09 | 湖南双友特材有限责任公司 | Concrete microdilatancy mineral admixture and preparation method thereof |
| CN106927708A (en) * | 2017-03-20 | 2017-07-07 | 陈亮 | Concrete novel extra material and its preparation method and application |
| CN107010862A (en) * | 2017-03-20 | 2017-08-04 | 陈亮 | Concrete novel extra material and its application |
| CN109987885A (en) * | 2017-12-29 | 2019-07-09 | 张大鹏 | The cementing building block of SFC and its manufacturing method |
| CN110028265A (en) * | 2019-03-13 | 2019-07-19 | 金泰成环境资源股份有限公司 | A kind of low viscous compact-type mineral admixture for concrete product |
| CN111620590A (en) * | 2020-06-19 | 2020-09-04 | 中山大学 | High-activity auxiliary cementing material for cement concrete and preparation method thereof |
| CN111620590B (en) * | 2020-06-19 | 2022-02-01 | 中山大学 | High-activity auxiliary cementing material for cement concrete and preparation method thereof |
| CN113213797A (en) * | 2021-04-09 | 2021-08-06 | 华南理工大学 | Steel slag and slag composite admixture and preparation method and application thereof |
| CN114538808A (en) * | 2022-03-14 | 2022-05-27 | 北京科技大学 | Circulating fluidized bed fly ash-based low-carbon cement and preparation method thereof |
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Application publication date: 20140521 |