CN111732359A - Method for manufacturing set cement by using regenerated micro powder - Google Patents
Method for manufacturing set cement by using regenerated micro powder Download PDFInfo
- Publication number
- CN111732359A CN111732359A CN202010483339.7A CN202010483339A CN111732359A CN 111732359 A CN111732359 A CN 111732359A CN 202010483339 A CN202010483339 A CN 202010483339A CN 111732359 A CN111732359 A CN 111732359A
- Authority
- CN
- China
- Prior art keywords
- micro powder
- regenerated micro
- auxiliary agent
- cement
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/026—Comminuting, e.g. by grinding or breaking; Defibrillating fibres other than asbestos
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/16—Waste materials; Refuse from building or ceramic industry
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1018—Coating or impregnating with organic materials
- C04B20/1022—Non-macromolecular compounds
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a method for manufacturing set cement by utilizing regenerated micro-powder, which is characterized in that firstly, building garbage is cleaned, crushed, screened and milled to form regenerated micro-powder, and an auxiliary agent is added during milling to form an auxiliary agent film which can be slowly dissolved in water on the surface of the regenerated micro-powder. Then carrying out hydration reaction with cement, regenerated micro powder and water, isolating the regenerated micro powder from the cement and the water by the aid film at the initial stage of the hydration reaction, and completing the cooperative hydration hardening process of the regenerated micro powder and the cement in stages along with the continuous dissolution of the aid film in the water, thereby ensuring the construction performance of the concrete or mortar, namely moderate setting time and good adaptability with concrete admixtures, keeping the flowing performance stable and ensuring the activity of the regenerated micro powder to be effectively exerted.
Description
Technical Field
The invention relates to the application field of regenerated micro powder in concrete and mortar, in particular to a method for manufacturing set cement by utilizing the regenerated micro powder.
Background
The recycled micro powder is particles with the particle size of less than 75 mu m which are generated concomitantly or directly processed in the process of preparing recycled aggregate by utilizing construction waste.
The production amount of the regenerated micro powder generated along with the preparation of the recycled aggregate by utilizing the construction waste is less, and the large-scale production is difficult, so that the construction waste recycled aggregate is basically utilized to be directly processed into the regenerated micro powder in the actual production process.
The active source in the construction waste recycled aggregate is mainly waste clay bricks. In the normal fineness range (350m 2/Kg-400 m2/Kg), the activity of the regenerated micro powder is lower than that of class II fly ash, the setting time is short, and the adaptability to concrete admixture is poor, so the application of the regenerated micro powder in the fields of concrete and mortar is greatly limited.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a method for manufacturing set cement by using regenerated micro powder, which solves the problems mentioned in the background technology.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme:
firstly, building garbage is cleaned, crushed, screened and milled to form regenerated micro powder, an auxiliary agent which can be slowly dissolved in water is added into the regenerated micro powder during milling, so that the auxiliary agent is dispersed and coated on the surface of the regenerated micro powder, and an auxiliary agent film is formed on the surface of the regenerated micro powder by the auxiliary agent; the auxiliary agent film at the initial stage of hydration reaction firstly isolates the regenerated micro powder from cement and water, the auxiliary agent film is dissolved in the water after a period of time, the regenerated micro powder is contacted with the cement and the water, and the regenerated micro powder plays an active role under the excitation action of the cement and is gradually hydrated and hardened to form a cement stone structure with certain strength. The scheme avoids the early-setting component of the regenerated micro powder from exerting the function too early, and avoids the defects of short setting time and poor adaptability with concrete admixtures of the concrete or mortar added with the common regenerated micro powder; the regenerated micro powder coated on the surface of the film structure capable of being slowly dissolved in water is capable of completing the process of cooperative hydration and hardening of the regenerated micro powder and cement in stages, so that the construction performance of concrete or mortar is guaranteed (the setting time is moderate, the adaptability with concrete admixture is good, the flowing performance is kept stable), the activity of the regenerated micro powder is also guaranteed to be effectively exerted, and the regenerated micro powder coated on the surface and capable of being slowly dissolved in water is not lower than class II fly ash through testing, so that the regenerated micro powder can be used for preparing the concrete and mortar by completely replacing class II fly ash.
Preferably, the content of the auxiliary agent is 2/ten thousand to 8/ten thousand. Because the auxiliary agent is added in the process of preparing the regenerated micro powder by grinding the regenerated aggregate, a trace amount (2/ten thousand-8/ten thousand) can ensure that a film with proper thickness is formed on the surface of the regenerated micro powder, and the cost for preparing the material is greatly reduced.
Preferably, the auxiliary agent is carbohydrate with the molecular weight of 300-1000 and low water solubility.
The invention has the following beneficial effects: according to the invention, the water-soluble auxiliary agent film is formed on the surface of the regenerated micro powder by adding the auxiliary agent, the auxiliary agent film isolates the regenerated micro powder from cement and water at the initial stage of hydration reaction, and the auxiliary agent film is continuously dissolved in the water to complete the cooperative hydration hardening process of the regenerated micro powder and the cement in stages, so that the construction performance of the concrete or mortar is ensured (the setting time is moderate, the adaptability with a concrete additive is good, the flowing performance is kept stable), and the activity of the regenerated micro powder is effectively exerted.
Detailed Description
The following examples are provided to illustrate the present invention in detail.
The invention provides a technical scheme that: firstly, building garbage is cleaned, crushed, screened and milled to form regenerated micro powder, and during milling, a water-soluble auxiliary agent is added into the regenerated micro powder to enable the auxiliary agent to be dispersed and coated on the surface of the regenerated micro powder, and an auxiliary agent film is formed on the surface of the regenerated micro powder by the auxiliary agent; the auxiliary agent film at the initial stage of hydration reaction firstly isolates the regenerated micro powder from cement and water, the auxiliary agent film is dissolved in the water after a period of time, the regenerated micro powder is contacted with the cement and the water, and the regenerated micro powder plays an active role under the excitation action of the cement and is gradually hydrated and hardened to form a cement stone structure with certain strength. The scheme avoids the early-setting component of the regenerated micro powder from exerting the function too early, and avoids the defects of short setting time and poor adaptability with concrete admixtures of the concrete or mortar added with the common regenerated micro powder; the regenerated micro powder coated on the surface of the film structure capable of being slowly dissolved in water is capable of completing the process of cooperative hydration and hardening of the regenerated micro powder and cement in stages, so that the construction performance of concrete or mortar is guaranteed (the setting time is moderate, the adaptability with concrete admixture is good, the flowing performance is kept stable), the activity of the regenerated micro powder is also guaranteed to be effectively exerted, and the regenerated micro powder coated on the surface and capable of being slowly dissolved in water is not lower than class II fly ash through testing, so that the regenerated micro powder can be used for preparing the concrete and mortar by completely replacing class II fly ash.
Preferably, the content of the auxiliary agent is 2/ten thousand to 8/ten thousand. Because the auxiliary agent is added in the process of preparing the regenerated micro powder by grinding the regenerated aggregate, a trace amount (2/ten thousand-8/ten thousand) can ensure that a film with proper thickness is formed on the surface of the regenerated micro powder, and the cost for preparing the material is greatly reduced.
Preferably, the auxiliary agent is carbohydrate with the molecular weight of 300-1000 and low water solubility.
The invention directly processes the construction waste recycled aggregate into the recycled micro powder, thus realizing large-scale production. The invention relates to innovation of manufacturing a layer of film capable of being slowly dissolved in water on the surface of regenerated micro powder, so that the activity of the regenerated micro powder is not lower than that of class II fly ash, the construction performance of the regenerated micro powder is excellent, and the regenerated micro powder completely replaces class II fly ash to be used for preparing concrete and mortar. The invention can also be applied to the modification of active admixture in the cement manufacturing process.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (3)
1. The utility model provides a method for utilize regeneration miropowder to make set cement, first-selected forms regeneration miropowder with construction waste through washing, crushing, screening, crocus step, its characterized in that: when grinding, adding an auxiliary agent which can be slowly dissolved in water into the regenerated micro powder, so that the auxiliary agent is dispersed and wrapped on the surface of the regenerated micro powder, and the auxiliary agent forms an auxiliary agent film on the surface of the regenerated micro powder; the auxiliary agent film at the initial stage of hydration reaction firstly isolates the regenerated micro powder from cement and water, the auxiliary agent film is dissolved in the water after a period of time, the regenerated micro powder is contacted with the cement and the water, and the regenerated micro powder plays an active role under the excitation action of the cement and is gradually hydrated and hardened to form a cement stone structure with certain strength.
2. The method for producing set cement using recycled micropowder according to claim 1, wherein: the content of the auxiliary agent is 2/ten thousand to 8/ten thousand.
3. The method for producing set cement using recycled micropowder according to claim 1 or 2, characterized in that: the auxiliary agent is carbohydrate with molecular weight of 300-1000 and low solubility in water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010483339.7A CN111732359A (en) | 2020-06-01 | 2020-06-01 | Method for manufacturing set cement by using regenerated micro powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010483339.7A CN111732359A (en) | 2020-06-01 | 2020-06-01 | Method for manufacturing set cement by using regenerated micro powder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111732359A true CN111732359A (en) | 2020-10-02 |
Family
ID=72648042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010483339.7A Pending CN111732359A (en) | 2020-06-01 | 2020-06-01 | Method for manufacturing set cement by using regenerated micro powder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111732359A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112707658A (en) * | 2020-12-30 | 2021-04-27 | 湖南大学 | Method for preparing regenerated UHPC cement by using waste ultrahigh-performance concrete |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005041750A (en) * | 2003-07-25 | 2005-02-17 | Kozue:Kk | Industrial waste regenerated aggregate and method of producing the same |
| CN104086126A (en) * | 2014-07-04 | 2014-10-08 | 北京东方建宇混凝土科学技术研究院有限公司 | Premixed concrete doped with brick recycled micro-powder |
-
2020
- 2020-06-01 CN CN202010483339.7A patent/CN111732359A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005041750A (en) * | 2003-07-25 | 2005-02-17 | Kozue:Kk | Industrial waste regenerated aggregate and method of producing the same |
| CN104086126A (en) * | 2014-07-04 | 2014-10-08 | 北京东方建宇混凝土科学技术研究院有限公司 | Premixed concrete doped with brick recycled micro-powder |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112707658A (en) * | 2020-12-30 | 2021-04-27 | 湖南大学 | Method for preparing regenerated UHPC cement by using waste ultrahigh-performance concrete |
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Application publication date: 20201002 |