CN103803821A - Fly ash cement and preparation method thereof - Google Patents
Fly ash cement and preparation method thereof Download PDFInfo
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- CN103803821A CN103803821A CN201310687028.2A CN201310687028A CN103803821A CN 103803821 A CN103803821 A CN 103803821A CN 201310687028 A CN201310687028 A CN 201310687028A CN 103803821 A CN103803821 A CN 103803821A
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- ash cement
- cement
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- fly ash
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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Abstract
The invention discloses fly ash cement comprising the following components in parts by weight: 30-40 parts of fly ashes, 53-65 parts of portland cement clinkers, 2-5 parts of dihydrate gypsum, 0.5-2 parts of excitants, 1-2 parts of active agents, 1.5-3 parts of early strength agents, 5-10 parts of lime, 6-12 parts of calcium-added slag and 15-25 parts of red mud. The fly ash cement disclosed by the invention can be used for also solving the problems of low early strength and long setting time, and the problem that later strength is still high besides that the fly ash cement has the excellent characteristics that the common flash ash cement is small in pollution, low in hydration heat, good in alkali-aggregate reaction resistance, sulfate corrosion resistance, dry shrinkage resistance, stability and the like, and especially, the excitants disclosed by the invention do not contain the substances such as sulfate, chloridion and the like, so that the latent instability of long-term durability of the cement and the concrete is effectively avoided, and meanwhile, the cost is greatly reduced due to adding of a lot of fly ashes and other slag. The obtained cement is extremely high in compressive strength, exceeds 40MPa after three days, and exceeds 70MPa after 28 days.
Description
Technical field
The present invention relates to a kind of pulverized fuel ash cement and preparation method thereof, belong to building material field.
Background technology
The extensive fast development of China's infrastructure construction needs a large amount of general class cement, and the feature of the high energy consumption of cement industry own, high resource consumption, high environmental pollution makes it face the huge challenge of unsustainable property and impact, seeking efficiently to utilize all types of industries waste residue to manufacture cement as the substitute of natural resource is the effective and feasible approach of alleviating or alleviate contradiction between demand and challenge.The utilization of industrial residue not only can slow down the consumption of natural resource, but also can eliminate the pollution to environment that waste residue itself causes.
Flyash is the powdery coal ash that fuel-burning power plant pulverized coal firing boiler is discharged, and is one more common in industrial solid castoff.Current China thermal power industry discharges every year flyash and exceedes 200,000,000 tons, but utilization ratio is only the 30%-40% of annual emissions.Along with the increase of power station, city heat supply engineering, the quantity discharged of flyash also will continue to keep increasing trend.
Arrive according to estimates the year two thousand twenty, the annual emissions of China's flyash will reach 3 times of present left and right, adds current China existing 2,000,000,000 tons of flyash accumulative total volume of cargo in storage, and total volume of cargo in storage will reach more than 30 hundred million tons.So a large amount of flyash not only can take a large amount of farmlands if do not added reasonable disposal and utilization, and can cause the pollution of underground water, air, destroys the eubiosis.Therefore the exploitation of, carrying out Technology of Comprehensive Utilization of Coal Ash seems very important.
Summary of the invention
First technical problem to be solved by this invention is: a kind of preparation method that can rationally utilize the pulverized fuel ash cement of the multiple slags such as flyash is provided.
For addressing the above problem, the technical solution used in the present invention is: a kind of pulverized fuel ash cement, consist of by mass fraction: flyash 30-40 part, Portland clinker 53-65 part, dihydrate gypsum 2-5 part, exciting agent 0.5-2 part, promoting agent 1-2 part, hardening accelerator 1.5-3 part, lime 5-10 part, increase calcium slag 6-12 part, red mud 15-25 part.
In described increasing calcium slag, 35～40% silicon-dioxide, 50～60% aluminium sesquioxides, 1～3% calcium oxide, surplus are other impurity.
Described exciting agent is Ca (OH)
2, Al (OH)
3, Mg (OH)
2, Fe (OH)
3, Cu (OH)
2, Na
2sO
4or KAl (SO
4)
2in one or more combination.
Second technical problem to be solved by this invention is: the preparation method that a kind of pulverized fuel ash cement is provided.
For solving second technical problem, the technical scheme providing is: a kind of preparation method of pulverized fuel ash cement, the steps include: that by dihydrate gypsum be 450～550m with Portland clinker intergrinding to specific surface area in proportion
2/ kg obtains A material, is 350-430m by exciting agent, promoting agent, hardening accelerator, lime, increasing calcium slag, red mud and flyash intergrinding to specific surface area
2/ kg obtains B material, and then A material is mixed with B material, makes pulverized fuel ash cement.
Beneficial effect of the present invention: pulverized fuel ash cement of the present invention is except the good characteristics such as the pollution that has general pulverized fuel ash cement and have is little, low hydration heat, anti-alkali-aggregate reaction, resisting erosion of sulfate, anti-drying shrinkage, good security, also solve early strength low, the problem that time of coagulation is long, and later strength is still very high, especially in the present invention's exciting agent used, the material such as containing sulfate, chlorion has not been avoided cement and the long-term weather resistance latent instability of concrete thereof effectively.Because the amount of flyash and other slags is mixed greatly, significantly reduce costs, the ultimate compression strength of gained cement is high, within three days, exceedes 40MPa, within 28 days, exceedes 70MPa simultaneously.
Embodiment
Embodiment 1
Be 450～550m with 62 parts of Portland clinker intergrindings to specific surface area in proportion by 5 parts of dihydrate gypsums
2/ kg obtains A material, is 350-430m by 2 parts of exciting agents, 1.5 portions of promoting agents, 3 parts of hardening accelerator, 8 parts of lime, 12 parts of increasing calcium slags, 25 parts of red muds and 35 parts of flyash intergrinding to specific surface areas
2/ kg obtains B material, and then A material is mixed with B material, makes pulverized fuel ash cement.
Embodiment 2
Be 450～550m with 55 parts of Portland clinker intergrindings to specific surface area in proportion by 3 parts of dihydrate gypsums
2/ kg obtains A material, is 350-430m by 1 part of exciting agent, 2 portions of promoting agents, 2.5 parts of hardening accelerator, 10 parts of lime, 8 parts of increasing calcium slags, 18 parts of red muds and 30 parts of flyash intergrinding to specific surface areas
2/ kg obtains B material, and then A material is mixed with B material, makes pulverized fuel ash cement.
Claims (4)
1. a pulverized fuel ash cement, consists of by mass fraction: flyash 30-40 part, Portland clinker 53-65 part, dihydrate gypsum 2-5 part, exciting agent 0.5-2 part, promoting agent 1-2 part, hardening accelerator 1.5-3 part, lime 5-10 part, increases calcium slag 6-12 part, red mud 15-25 part.
2. pulverized fuel ash cement according to claim 1, is characterized in that, in described increasing calcium slag, 35～40% silicon-dioxide, 50～60% aluminium sesquioxides, 1～3% calcium oxide, surplus are other impurity.
3. pulverized fuel ash cement according to claim 1, is characterized in that, described exciting agent is Ca (OH)
2, Al (OH)
3, Mg (OH)
2, Fe (OH)
3, Cu (OH)
2, Na
2sO
4or KAl (SO
4)
2in one or more combination.
4. the preparation method of pulverized fuel ash cement claimed in claim 1, the steps include: that by dihydrate gypsum be 450～550m with Portland clinker intergrinding to specific surface area in proportion
2/ kg obtains A material, is 350-430m by exciting agent, promoting agent, hardening accelerator, lime, increasing calcium slag, red mud and flyash intergrinding to specific surface area
2/ kg obtains B material, and then A material is mixed with B material, makes pulverized fuel ash cement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310687028.2A CN103803821A (en) | 2013-12-16 | 2013-12-16 | Fly ash cement and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310687028.2A CN103803821A (en) | 2013-12-16 | 2013-12-16 | Fly ash cement and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103803821A true CN103803821A (en) | 2014-05-21 |
Family
ID=50701268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310687028.2A Pending CN103803821A (en) | 2013-12-16 | 2013-12-16 | Fly ash cement and preparation method thereof |
Country Status (1)
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| CN (1) | CN103803821A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104556909A (en) * | 2015-01-13 | 2015-04-29 | 河海大学 | Fast-setting anti-corrosion cement using coal ash as raw material and preparation method thereof |
| CN106145721A (en) * | 2016-08-22 | 2016-11-23 | 安徽省高迪环保股份有限公司 | A kind of pulverized fuel ash cement processing method |
| CN106866062A (en) * | 2015-12-11 | 2017-06-20 | 北京市湟砂建材科技有限公司 | Finishing cement of the organo-mineral complexing of high-content fly ash and its preparation method and application |
| CN108821686A (en) * | 2018-07-13 | 2018-11-16 | 浙江大学 | A kind of preparation method and product of aluminium calcium carbonate composite gelled material |
| US10584063B2 (en) | 2014-11-21 | 2020-03-10 | Saint-Gobain Placo | Fire resistant calcium sulphate-based products |
| US10662113B2 (en) | 2014-11-21 | 2020-05-26 | Saint-Gobain Placo | Fire-resistant calcium sulphate-based products |
| CN111875325A (en) * | 2020-08-12 | 2020-11-03 | 太原理工大学 | Curing agent for kaolin polluted by copper ions and sample preparation method |
| CN112174553A (en) * | 2020-10-13 | 2021-01-05 | 张延年 | Composite activated low-calcium fly ash cement and preparation method thereof |
| CN112499919A (en) * | 2020-01-09 | 2021-03-16 | 中国铝业股份有限公司 | Treatment method of copper smelting sludge |
| US11117834B2 (en) | 2014-11-21 | 2021-09-14 | Saint-Gobain Placo | Calcium sulphase-based products |
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| CN1037885A (en) * | 1989-04-08 | 1989-12-13 | 王复生 | A kind of method of producing very fast hardening portland cement |
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| US20120216721A1 (en) * | 2009-11-05 | 2012-08-30 | Saint-Gobain Weber | Construction materials binders |
| CN103193402A (en) * | 2013-03-05 | 2013-07-10 | 安徽金德威建筑材料有限责任公司 | Tailing base filling cement produced by fine grade tailings replacing part of fly ash |
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2013
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Patent Citations (6)
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| CN1037885A (en) * | 1989-04-08 | 1989-12-13 | 王复生 | A kind of method of producing very fast hardening portland cement |
| CN1092046A (en) * | 1994-02-02 | 1994-09-14 | 田键 | A kind of slag cement compound method of promoting agent |
| CN1121495A (en) * | 1994-11-18 | 1996-05-01 | 王贵林 | Zeolite silicate color cement |
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| US20120216721A1 (en) * | 2009-11-05 | 2012-08-30 | Saint-Gobain Weber | Construction materials binders |
| CN103193402A (en) * | 2013-03-05 | 2013-07-10 | 安徽金德威建筑材料有限责任公司 | Tailing base filling cement produced by fine grade tailings replacing part of fly ash |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10662113B2 (en) | 2014-11-21 | 2020-05-26 | Saint-Gobain Placo | Fire-resistant calcium sulphate-based products |
| US11198645B2 (en) | 2014-11-21 | 2021-12-14 | Saint-Gobain Placo | Fire resistant calcium sulphate-based products |
| US11117835B2 (en) | 2014-11-21 | 2021-09-14 | Saint-Gobain Placo | Fire resistant calcium sulphate-based products |
| US11117834B2 (en) | 2014-11-21 | 2021-09-14 | Saint-Gobain Placo | Calcium sulphase-based products |
| US10584063B2 (en) | 2014-11-21 | 2020-03-10 | Saint-Gobain Placo | Fire resistant calcium sulphate-based products |
| CN104556909B (en) * | 2015-01-13 | 2016-07-27 | 河海大学 | A kind of be raw material with flyash fast solidifying anti-corrosion cement and preparation method thereof |
| CN104556909A (en) * | 2015-01-13 | 2015-04-29 | 河海大学 | Fast-setting anti-corrosion cement using coal ash as raw material and preparation method thereof |
| CN106866062A (en) * | 2015-12-11 | 2017-06-20 | 北京市湟砂建材科技有限公司 | Finishing cement of the organo-mineral complexing of high-content fly ash and its preparation method and application |
| CN106866062B (en) * | 2015-12-11 | 2019-04-23 | 北京市湟砂建材科技有限公司 | Finishing cement of the organo-mineral complexing of high-content fly ash and its preparation method and application |
| CN106145721A (en) * | 2016-08-22 | 2016-11-23 | 安徽省高迪环保股份有限公司 | A kind of pulverized fuel ash cement processing method |
| CN108821686A (en) * | 2018-07-13 | 2018-11-16 | 浙江大学 | A kind of preparation method and product of aluminium calcium carbonate composite gelled material |
| CN112499919A (en) * | 2020-01-09 | 2021-03-16 | 中国铝业股份有限公司 | Treatment method of copper smelting sludge |
| CN112499919B (en) * | 2020-01-09 | 2022-07-26 | 中国铝业股份有限公司 | Treatment method of copper smelting sludge |
| CN111875325A (en) * | 2020-08-12 | 2020-11-03 | 太原理工大学 | Curing agent for kaolin polluted by copper ions and sample preparation method |
| CN112174553A (en) * | 2020-10-13 | 2021-01-05 | 张延年 | Composite activated low-calcium fly ash cement and preparation method thereof |
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| AD01 | Patent right deemed abandoned |
Effective date of abandoning: 20160316 |
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