CN102211885A - Composite early strength type cement mixed material - Google Patents
Composite early strength type cement mixed material Download PDFInfo
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- CN102211885A CN102211885A CN2011100846524A CN201110084652A CN102211885A CN 102211885 A CN102211885 A CN 102211885A CN 2011100846524 A CN2011100846524 A CN 2011100846524A CN 201110084652 A CN201110084652 A CN 201110084652A CN 102211885 A CN102211885 A CN 102211885A
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- cement
- red mud
- early strength
- mixed material
- ore powder
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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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- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a composite early strength type cement mixed material. The cement mixed material at least comprises red mud, and the doped amount of the red mud is less than or equal to 15%. The early strength type cement mixed material also comprises a mixture of red mud and ore powder, wherein the doped amount of red mud is 5%, and the doped amount of ore powder is 10%. The early strength type cement mixed material can further be a mixture of red mud, ore powder and coal ash, wherein the doped amounts of red mud, ore powder and coal ash are respectively 5%. According to the invention, industrial byproduct solid wastes such as red mud are used as the cement mixed materials, and wastes are turned into wealth, thereby being beneficial to environmental protection; social and economic benefits are obvious; cement production process is unchanged, and the solid wastes such as red mud are used to replace other mixed materials, thereby reducing energy consumption; and compared with the cement in which coal ash, ore powder or mixture of coal ash and ore powder is singly used as the cement mixed material, the mixed material in the invention is used as the cement mixed material, thus the early strength of the cement can be improved.
Description
Technical field
The present invention relates to a kind of composite high-early strength type cement mixture, belong to the silicate cement technical field.
Background technology
Cement Production has consumed Mineral resources such as a large amount of energy and Wingdale, clay, has also discharged a large amount of pollutents.According to data: 1 ton of silicate cement of every production, need to consume about 1.3 tons of Wingdale, about 0.3 ton of clay is discharged CO more than 1 ton
2Gas also has a large amount of NO
2, SO
2And dust.Simultaneously, along with industrial expansion, the industrial residue (red mud, flyash, blast-furnace slag, coal gangue the like waste) of China's industrial production sector discharging increases year by year, they have not only taken a large amount of soils, what have goes back polluted source, atmosphere, brings very big harm for economic construction and people's lives.Studies show that in a large number, industrial residue (as red mud, slag, flyash etc.) is used as cement admixture, not only effectively utilized industrial residue, environmental pollution and land seizure that waste residue causes have been reduced, reduced the Cement Production cost, reduced owing to produce environmental pollution that cement causes and the energy, resource consumption, can also improve the cement solidity to corrosion simultaneously, reduced hydration heat, optimize pore structure of cement stone, improve cement stone later strength etc.
Industrial residue is as the cement admixture history of existing decades, and the application of having succeedd at cement industry of many industrial residues.But judging from the current situation, still there is individual problem, when being used as cement additive, has the problem of the early strength decline that makes cement, thereby might limit the range of application of cement, influence the sales volume of cement as the part industrial residue.
The existing cement that contains the silicate cement grog, generally by cement mixture, Portland clinker and gypsum according to a certain percentage combined grinding make, usually utilize calcareous addition of volcano making cement blended materials such as slag or flyash, with the label of adjusting cement and the performance of cement, reduce Cement Production cost and save energy.But high-quality blended materials such as flyash, slag are more and more in short supply at present, and price is soaring year by year, are badly in need of seeking new waste material, improve the problem of blended material shortage of resources.Adopt making cement blended materials such as flyash to have following shortcoming simultaneously:
1, solid waste activity such as flyash is lower, and they are made cement mixture separately and partly replace cement, the early strength (3d) of cement is had adverse influence, thereby might influence the use of cement;
2, flyash is under the situation of big volume, and is not only unfavorable to the early strength of cement, and later strength is also had adverse influence;
3, in recent ten years, along with the development of China's capital construction, many areas begin to face solid waste problem of shortage such as flyash, slag, make prices such as flyash, slag soaring year by year, have increased the Cement Production cost.
Red mud is not fully used at present as a kind of industrial by-products of producing aluminum oxide, and stacking needs land occupation, and contaminate environment.
Summary of the invention
The purpose of this invention is to provide a kind of composite high-early strength type cement mixture, the early strength (3 days) of cement is improved, but do not influence its later strength.The present invention adopts following technical scheme:
A kind of composite high-early strength type cement mixture, described cement mixture comprises red mud at least, red mud volume≤15%.
Described composite high-early strength type cement mixture, described cement mixture comprises red mud and breeze, and the red mud volume is 5%, and contents of ground slag is 10%.
Described composite high-early strength type cement mixture, described cement mixture comprises red mud, breeze and flyash, red mud, flyash, contents of ground slag are respectively 5%.
Compared with prior art, the present invention has following characteristics:
(1) utilizes solid waste such as industrial by-products red mud to make cement mixture, turn waste into wealth, help environment protection, social benefit and remarkable in economical benefits;
(2) production technique is constant, only replaces other blended material with solid waste such as red muds, and energy consumption reduces;
(3) compare with single cement of making cement mixture with flyash, breeze or flyash and breeze blending, this blended material is made cement mixture, can improve the early strength of cement.
Embodiment
Technical scheme of the present invention is in order to achieve the above object: the present invention has chosen flyash, commercially available S95 level breeze, limestone powder, four kinds of solid waste of red mud, earlier their independent respectively ratios with 5%, 10%, 15% are replaced cement clinker (containing gypsum), on this basis, fixedly the overall proportion of blended material is 15%, with they blendings, and wherein the fixed ratio of red mud is 5%, has studied them to cement 3d, the influence of 28d intensity.
Below, the present invention is described in further detail in conjunction with some embodiment, but the present invention is not limited to these specific embodiments.
Embodiment 1
Cement clinker (containing gypsum) and cement mixture are pressed mixed shown in the table 1, reach 80 μ m with ball mill grinding to fineness and tail over, obtain cement less than 10%.To the cement that obtains,, record strength of cement mortar (3 days, 28 days anti-foldings and ultimate compression strength) according to GB/T 17671-1999 Test method for strength of hydraulic cement mortar.The result is as shown in table 1.
The different mixing of table 1 material list is mixed the influence to strength of cement
As known from Table 1, select for use red mud as blended material separately, and its volume≤15% o'clock, gained silicate cement strength grade can reach 42.5 grades, and early strength (3 days) big than neat portland cement.
Embodiment 2
Identical with embodiment 1, will reach 80 μ m with ball mill grinding to fineness and tail over by the mixing material shown in the table 2 less than 10%, obtain cement.To the cement that obtains,, record strength of cement mortar (3 days, 28 days anti-foldings and ultimate compression strength) according to GB/T 17671-1999 Test method for strength of hydraulic cement mortar.The result is as shown in table 2.
The compound blended material of table 2 is to the influence of strength of cement
As can be seen from Table 2, the red mud volume is 5%, and contents of ground slag is 10% to form mixing material silicate cement strength grade and can reach more than 52.5 grades, and early strength (3 days) big than neat portland cement.Red mud, flyash, contents of ground slag are respectively 5% to be formed mixing material silicate cement strength grade and can reach more than 52.5 grades, and early strength (3 days) big than neat portland cement.
Use cement additive of the present invention, can obtain all good cement of early strength and later strength.In addition, red mud itself contains a certain amount of β one Dicalcium Phosphate (Feed Grade) and amorphous aluminosilicate, and certain hydraulicity is arranged, and the alkali in the red mud can excite flyash and scoriaceous activity, makes it that certain solidifiability be arranged.
The present invention's beneficial effect compared with the prior art is, there is the influence be subjected to the early stage physical and mechanical property of cement mixing ratio volume, cement in cement mixtures such as the flyash of prior art, and the composite high-early strength type cement mixture of the present invention's preparation can overcome the problems referred to above fully, can require to carry out volume according to cement mark, and reach the strength criterion of this label, do not reduce its early strength simultaneously again.
The composite high-early strength type cement mixture plural gel effect that alternative part cement clinker forms in silicate cement can improve the early strength of cement, reduces production costs, and in technical feature and economic benefit remarkable advantages is arranged.
The present invention is applicable to the preparation of blended material silicate cement, improves cement performance, regulates cement mark with composite high-early strength type cement mixture, saves the cement production cost.
Claims (3)
1. a composite high-early strength type cement mixture is characterized in that described cement mixture comprises red mud at least, red mud volume≤15%.
2. composite high-early strength type cement mixture according to claim 1 is characterized in that described cement mixture comprises red mud and breeze, and the red mud volume is 5%, and contents of ground slag is 10%.
3. composite high-early strength type cement mixture according to claim 1 is characterized in that described cement mixture comprises red mud, breeze and flyash, and red mud, flyash, contents of ground slag are respectively 5%.
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| CN2011100846524A CN102211885A (en) | 2011-04-06 | 2011-04-06 | Composite early strength type cement mixed material |
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| CN2011100846524A CN102211885A (en) | 2011-04-06 | 2011-04-06 | Composite early strength type cement mixed material |
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| CN102211885A true CN102211885A (en) | 2011-10-12 |
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| CN2011100846524A Pending CN102211885A (en) | 2011-04-06 | 2011-04-06 | Composite early strength type cement mixed material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102718417A (en) * | 2012-06-18 | 2012-10-10 | 河南理工大学 | Preparation method for early strength cement admixture containing red mud or coal gangue |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101343151A (en) * | 2008-07-23 | 2009-01-14 | 宁波科环新型建材股份有限公司 | PHC pipe pile cement and preparation thereof |
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2011
- 2011-04-06 CN CN2011100846524A patent/CN102211885A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101343151A (en) * | 2008-07-23 | 2009-01-14 | 宁波科环新型建材股份有限公司 | PHC pipe pile cement and preparation thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102718417A (en) * | 2012-06-18 | 2012-10-10 | 河南理工大学 | Preparation method for early strength cement admixture containing red mud or coal gangue |
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Application publication date: 20111012 |