CN103204643B - The composite flyash of a kind of modification is used for method prepared by cement - Google Patents
The composite flyash of a kind of modification is used for method prepared by cement Download PDFInfo
- Publication number
- CN103204643B CN103204643B CN201310149185.8A CN201310149185A CN103204643B CN 103204643 B CN103204643 B CN 103204643B CN 201310149185 A CN201310149185 A CN 201310149185A CN 103204643 B CN103204643 B CN 103204643B
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- CN
- China
- Prior art keywords
- flyash
- cement
- composite
- modification
- surface area
- Prior art date
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- 239000010881 fly ash Substances 0.000 title claims abstract description 63
- 239000004568 cement Substances 0.000 title claims abstract description 37
- 239000002131 composite material Substances 0.000 title claims abstract description 23
- 238000012986 modification Methods 0.000 title claims abstract description 17
- 230000004048 modification Effects 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000000227 grinding Methods 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims 1
- 239000011505 plaster Substances 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 7
- 238000009826 distribution Methods 0.000 abstract description 4
- 239000002245 particle Substances 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 description 9
- 239000010883 coal ash Substances 0.000 description 5
- 239000004567 concrete Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 230000003009 desulfurizing effect Effects 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000010430 carbonatite Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910001653 ettringite Inorganic materials 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
Classifications
-
- 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
Landscapes
- Processing Of Solid Wastes (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses the method that the composite flyash of a kind of modification is prepared for cement, by flyash grinding is reached 350m to specific surface area
2/ kg ~ 600m
2/ kg, selects specific surface area to be 350m
2/ kg ~ 400m
2/ kg, 450m
2/ kg ~ 500m
2/ kg and 550m
2/ kg ~ 600m
2the flyash of/kg, carries out composite according to the ratio of 15% ~ 25%:25% ~ 40%:40% ~ 60%, obtains the composite flyash of modification; The composite flyash of gained modification is added in cement clinker according to the volume of 20% ~ 40%, adds the desulfurated plaster accounting for flyash quality 0.5% ~ 2.5%, combined grinding simultaneously.The present invention, by improving the fineness of flyash, optimizes particle size distribution, improves the activity of flyash, can utilize industrial residue in a large number, realize energy-saving and emission-reduction.
Description
Technical field
The invention belongs to building material technical field, be specifically related to the method that the composite flyash of a kind of modification is prepared for cement.
Background technology
Flyash is one of the most large industrial waste of China, and annual emissions is more than 200,000,000 tons, more and more heavier to the burden of economic, society, environment.China's flyash research and development utilization starts from the 1950's, mainly concentrates on cement and the research of concrete development experiments, and widespread use in engineering construction.But cement mixture and the quality of concrete admixture to flyash have higher requirement, volume also has certain restriction simultaneously, the colory flyash of a very little part is only had just to be permitted for concrete structure engineering, major part flyash due to particle thick, water requirement is large, active low, can not be utilized effectively in cement system.How breakthrough bottleneck, high-effect excavate the potentiality of more inferior flyash in cement cementitious system, while reducing construction costs, meet higher construction quality requirement, become problem demanding prompt solution.
Meanwhile, Eleventh Five-Year Plan Environmental planning Chinese Home strengthens the input of large-scale coal-burning utilities flue-gas desulfurizing engineering, the efficiency utilization problem of the industry byproduct desulfurated plaster produced causes the extensive concern of people, if mishandling, flue-gas desulfurizing engineering has just transformed pollution form, fundamentally do not solve the pollution of sulfurous gas, and bank up precious resources such as more serious contaminated land, water sources.Therefore, how resource utilization efficiency utilization desulfurated plaster becomes the key solving sulfur dioxide pollution.
Summary of the invention
The object of this invention is to provide the method that the composite flyash of a kind of modification is prepared for cement, by improving the fineness of flyash and optimizing its particle size distribution, improve the activity of flyash, it is used in a large number cement preparation, reduce cement cost, make the flyash of bulk deposition be utilized effectively simultaneously.
To achieve these goals, technical scheme of the present invention is:
The composite flyash of modification is used for a method prepared by cement, it is characterized in that, follows these steps to carry out:
(1) flyash grinding is reached 350m to specific surface area
2/ kg ~ 600m
2/ kg, selects specific surface area to be 350m
2/ kg ~ 400m
2/ kg, 450m
2/ kg ~ 500m
2/ kg and 550m
2/ kg ~ 600m
2the flyash of/kg, carries out composite according to the ratio of 15% ~ 25%:25% ~ 40%:40% ~ 60%, obtains the composite flyash of modification;
A preferred version is: select specific surface area to be 390m
2/ kg, 480m
2/ kg, 550m
2the flyash of/kg is composite with 17%:33%:50% ratio;
This step improves the specific surface area of flyash by grinding, and unit volume flyash activating point increases, and simultaneously due to the existence of Mechanochemical Effect, flyash activity is improved.
(2) the composite flyash of gained modification according to 20% ~ 40% volume be added in cement clinker, add the desulfurated plaster accounting for flyash quality 0.5% ~ 2.5%, combined grinding simultaneously; Preferably dried at 50 DEG C by desulfurated plaster and obtain two water desulfurated plasters to constant weight, volume is 1% ~ 2% of flyash quality;
The specific surface area of ordinary Portland cement is 300m
2/ kg ~ 400m
2/ kg, its particle size distribution is wider and discontinuous, and mixing of superfined flyash can the gap grading of powder filler coal ash hydrated blended cement system part, makes size distribution more reasonable, play good filling role;
Desulfurated plaster, while promotion cement clinker aquation, increases Ca in liquid phase (OH)
2concentration, the alkali-activated carbonatite being all flyash with the alkaline matter one in exciting agent provides condition; On the other hand, the desulfurated plaster in system, can A1 directly and in flyash in alkaline environment
2o
3active ingredient reaction generates ettringite, plays the effect of sulphate activation simultaneously.
Adopt technical scheme of the present invention, when doping quantity of fly ash is 20% ~ 40%, the flyash early activity adopting method of modifying provided by the invention to prepare significantly improves, and 28d activity index improves 20% ~ 25%.Modified coal ash is used for cement mixture and produces PO42.5(R), PF42.5 (R) cement meets the requirement of GB175-2007 " general purpose portland cement " relevant art.Adopt modification provided by the invention and using method ordinary fly ash can be widely used in cement mixture, reduce cement clinker consumption, realize the target of energy-saving and emission-reduction.
Embodiment
Embodiment 1
By flyash separate compiling to 400m
2/ kg, 500m
2/ kg, 550m
2/ kg, 3 kinds of flyash are mixed to get composite flyash with 17%:33%:50% ratio.Adopt PI62.5R cement clinker, treat that cement grinding is to 300m
2after/kg, mix 20% composite flyash, add the desulfurated plaster accounting for flyash quality 1.0% simultaneously, mix grinding to specific surface area is 400m
2/ kg, prepares PO52.5R cement.Its fundamental property is in table 1.As shown in Table 1, compared with unmodified front flyash, modification provided by the invention and using method is adopted to use the performance in each length of time preparing cement to improve 21%, 13%, 35%, 20% respectively, Be very effective as blended material.
Table 1 before modified rear coal ash for manufacturing contrasts for cement performance
Embodiment 2
By flyash separate compiling to 400m
2/ kg, 500m
2/ kg, 550m
2/ kg, 3 kinds of flyash are mixed to get composite flyash with 15%:25%:60% ratio.Adopt PI62.5R cement clinker, treat that cement grinding is to 300m
2after/kg, mix 40% composite flyash, add the desulfurated plaster accounting for flyash quality 1.0% simultaneously, mix grinding to specific surface area is 450m
2/ kg, prepares PF42.5R cement.Its fundamental property is in table 2.As shown in Table 2, compared with unmodified front flyash, modification provided by the invention and using method is adopted to use the performance in each length of time preparing cement to improve 20%, 16%, 34%, 22% respectively, Be very effective as blended material.
Table 2 before modified rear coal ash for manufacturing contrasts for cement performance
Embodiment 3
By flyash separate compiling to 400m
2/ kg, 500m
2/ kg, 550m
2/ kg, 3 kinds of flyash are mixed to get composite flyash with 17%:33%:50% ratio.Adopt PI52.5R cement clinker, treat that cement grinding is to 300m
2after/kg, mix 40% composite flyash, add the desulfurated plaster accounting for flyash quality 2% simultaneously, mix grinding to specific surface area is 450m
2/ kg, prepares PF42.5R cement.Its fundamental property is in table 3.As shown in Table 3, compared with unmodified front flyash, modification provided by the invention and using method is adopted to use the performance in each length of time preparing cement to improve 20%, 21%, 26%, 16% respectively, Be very effective as blended material.
Table 3 before modified rear coal ash for manufacturing contrasts for cement performance
Claims (1)
1. the composite flyash of modification is used for a method prepared by cement, it is characterized in that, follows these steps to carry out:
(1) flyash separate compiling is to 400m
2/ kg, 500m
2/ kg, 550m
2/ kg, 3 kinds of flyash are mixed to get composite flyash with 17%:33%:50% ratio, obtain the composite flyash of modification;
(2) the composite flyash of gained modification according to 40% volume be added in PI52.5R cement clinker, add the two water desulfurated plasters of drying at 50 DEG C to constant weight accounting for flyash quality 2%, combined grinding to specific surface area is 450m simultaneously
2/ kg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310149185.8A CN103204643B (en) | 2013-04-25 | 2013-04-25 | The composite flyash of a kind of modification is used for method prepared by cement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310149185.8A CN103204643B (en) | 2013-04-25 | 2013-04-25 | The composite flyash of a kind of modification is used for method prepared by cement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103204643A CN103204643A (en) | 2013-07-17 |
| CN103204643B true CN103204643B (en) | 2016-03-02 |
Family
ID=48752081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310149185.8A Active CN103204643B (en) | 2013-04-25 | 2013-04-25 | The composite flyash of a kind of modification is used for method prepared by cement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103204643B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108033731A (en) * | 2017-12-29 | 2018-05-15 | 成都精准混凝土有限公司 | Decorate granolithic concrete and its preparation process |
| CN115180844B (en) * | 2022-06-15 | 2023-03-07 | 盐城市鼎力新材料有限公司 | Activated superfine fly ash doped cement and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1045444A (en) * | 1996-07-30 | 1998-02-17 | Nippon Cement Co Ltd | Treatment of coal ash |
| CN101549965A (en) * | 2009-04-30 | 2009-10-07 | 中国建筑材料科学研究总院 | A cement-based solidified material for processing middle and low radioactive incineration ash and a method for processing middle and low radioactive incineration ash |
| CN101786811A (en) * | 2010-01-15 | 2010-07-28 | 中国水利水电第三工程局有限公司 | Method for preparing multicomponent powder binding material |
| CN102092973A (en) * | 2010-12-17 | 2011-06-15 | 南京工业大学 | Fly ash cement and preparation method thereof |
| CN102795819A (en) * | 2012-08-23 | 2012-11-28 | 西南交通大学 | Low-carbon high-performance tunnel shotcrete composite cementing material |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1102133C (en) * | 1997-12-25 | 2003-02-26 | 张耀伦 | Less clinker high early strength flyash cement |
| CN100379701C (en) * | 2005-12-02 | 2008-04-09 | 韦柳青 | Method for producing cement using desulfurized gypsum and fine coal ash |
-
2013
- 2013-04-25 CN CN201310149185.8A patent/CN103204643B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1045444A (en) * | 1996-07-30 | 1998-02-17 | Nippon Cement Co Ltd | Treatment of coal ash |
| CN101549965A (en) * | 2009-04-30 | 2009-10-07 | 中国建筑材料科学研究总院 | A cement-based solidified material for processing middle and low radioactive incineration ash and a method for processing middle and low radioactive incineration ash |
| CN101786811A (en) * | 2010-01-15 | 2010-07-28 | 中国水利水电第三工程局有限公司 | Method for preparing multicomponent powder binding material |
| CN102092973A (en) * | 2010-12-17 | 2011-06-15 | 南京工业大学 | Fly ash cement and preparation method thereof |
| CN102795819A (en) * | 2012-08-23 | 2012-11-28 | 西南交通大学 | Low-carbon high-performance tunnel shotcrete composite cementing material |
Non-Patent Citations (1)
| Title |
|---|
| 低品质粉煤灰作为水泥混合材的试验研究;王穆君;《粉煤灰》;20121031(第5期);第1-4页 * |
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| Publication number | Publication date |
|---|---|
| CN103204643A (en) | 2013-07-17 |
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Address after: 310006 99 Huaxing Road, Xihu District, Hangzhou, Zhejiang (Hangzhou Neusoft business building) Co-patentee after: SHANGHAI RESEARCH INSTITUTE OF BUILDING SCIENCES (Group) Co.,Ltd. Patentee after: Zhejiang Tianda Environmental Protection Co.,Ltd. Address before: 310006 17 17, Hua zhe Plaza, North Ring Road, Hangzhou, Zhejiang. Co-patentee before: SHANGHAI RESEARCH INSTITUTE OF BUILDING SCIENCES (Group) Co.,Ltd. Patentee before: Zhejiang Tianda Environmental Protection Co.,Ltd. |
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Effective date of registration: 20180621 Address after: 310012 99 Huaxing Road, Xihu District, Hangzhou, Zhejiang (Hangzhou Neusoft business building) Co-patentee after: SHANGHAI RESEARCH INSTITUTE OF BUILDING SCIENCES (Group) Co.,Ltd. Patentee after: ZHEJIANG TIANDI ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. Address before: 310006 99 Huaxing Road, Xihu District, Hangzhou, Zhejiang (Hangzhou Neusoft business building) Co-patentee before: SHANGHAI RESEARCH INSTITUTE OF BUILDING SCIENCES (Group) Co.,Ltd. Patentee before: Zhejiang Tianda Environmental Protection Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |
Address after: 310012 99 Huaxing Road, Xihu District, Hangzhou, Zhejiang (Hangzhou Neusoft business building) Co-patentee after: SHANGHAI RESEARCH INSTITUTE OF BUILDING SCIENCES (Group) Co.,Ltd. Patentee after: Zhejiang Tiandi Environmental Protection Technology Co.,Ltd. Address before: 310012 99 Huaxing Road, Xihu District, Hangzhou, Zhejiang (Hangzhou Neusoft business building) Co-patentee before: SHANGHAI RESEARCH INSTITUTE OF BUILDING SCIENCES (Group) Co.,Ltd. Patentee before: ZHEJIANG TIANDI ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. |
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Effective date of registration: 20231102 Address after: Room A710, Building 1, No. 2159-1 Yuhangtang Road, Wuchang Street, Yuhang District, Hangzhou City, Zhejiang Province, 310015 Patentee after: Zhejiang Zheneng Tianda Environmental Protection Technology Co.,Ltd. Patentee after: SHANGHAI RESEARCH INSTITUTE OF BUILDING SCIENCES (Group) Co.,Ltd. Address before: 310012 99 Huaxing Road, Xihu District, Hangzhou, Zhejiang (Hangzhou Neusoft business building) Patentee before: Zhejiang Tiandi Environmental Protection Technology Co.,Ltd. Patentee before: SHANGHAI RESEARCH INSTITUTE OF BUILDING SCIENCES (Group) Co.,Ltd. |