CN111362625A - Metakaolin-based polymer for repairing concrete cracks - Google Patents
Metakaolin-based polymer for repairing concrete cracks Download PDFInfo
- Publication number
- CN111362625A CN111362625A CN201811598815.9A CN201811598815A CN111362625A CN 111362625 A CN111362625 A CN 111362625A CN 201811598815 A CN201811598815 A CN 201811598815A CN 111362625 A CN111362625 A CN 111362625A
- Authority
- CN
- China
- Prior art keywords
- metakaolin
- based polymer
- concrete cracks
- repairing
- repairing concrete
- 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.)
- Pending
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Classifications
-
- 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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/006—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing mineral polymers, e.g. geopolymers of the Davidovits type
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00663—Uses not provided for elsewhere in C04B2111/00 as filling material for cavities or the like
- C04B2111/00672—Pointing or jointing materials
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/10—Mortars, concrete or artificial stone characterised by specific physical values for the viscosity
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- 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
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Engineering & Computer Science (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a metakaolin-based polymer for repairing concrete cracks, which has the characteristics of high strength, good cementing property with concrete and the like, and has the advantages of simple preparation process, energy conservation, environmental protection and the like. The metakaolin-based polymer for repairing concrete cracks is prepared from 700-900 parts by weight of metakaolin, 100-300 parts by weight of fly ash and 800-1000 parts by weight of water glass.
Description
Technical Field
The invention belongs to the field of novel building materials, and particularly relates to an inorganic cementing material prepared from metakaolin and fly ash.
Background
The concrete is prepared by mixing cement, sand, stone, additives, water and other materials in a certain proportion, and stirring, molding and curing. Has the advantages of high strength, strong bearing capacity, low price and the like, and is one of the materials with the largest application amount and the widest range in the field of civil engineering. The concrete is easy to crack due to factors such as structural stress, foundation deformation, temperature change and the like, and the service performance of the structure is seriously influenced.
At present, the repairing materials developed aiming at the concrete crack problem mainly comprise inorganic repairing materials and organic repairing materials. The inorganic repairing material mainly uses special cement or portland cement doped with an early strength agent, has the advantages of simple process, low application cost and the like, but also has the problems of high brittleness, easy shrinkage crack generation after repairing and the like; the organic repairing material is mainly epoxy resin, polyurethane and the like, has the advantages of high bonding strength, good corrosion resistance and impermeability and the like, but also has the problems of poor fatigue resistance, easy aging and the like. The solution of the related problems remains one of the important problems facing the field of civil engineering.
The metakaolin-based polymer is a novel inorganic cementing material, has the characteristics of high strength, excellent durability and the like due to the specific network structure, has the advantages of high setting rate, strong cementing power with concrete, simple preparation process and the like, and is suitable for being used as a concrete crack repairing material.
Disclosure of Invention
The invention aims to provide a metakaolin-based geopolymer for repairing concrete cracks, and further provides a method and technical support for solving the problem of concrete cracks.
The metakaolin-based polymer for repairing concrete cracks is prepared by uniformly mixing and stirring 700-900 parts by weight of metakaolin, 100-300 parts by weight of fly ash and 800-1000 parts by weight of water glass.
The metakaolin-based polymer for repairing the concrete cracks is further prepared by calcining metakaolin at 600-900 ℃ for 2-6 hours.
The metakaolin-based geopolymer for repairing concrete cracks has the further technical scheme that the average particle size of the fly ash is less than or equal to 30 mu m.
The metakaolin-based polymer for repairing the concrete crack has the further technical scheme that the modulus of the water glass is 1.2-1.5.
Compared with the prior art, the invention has the following beneficial effects:
(1) the metakaolin-based polymer for repairing concrete cracks has the characteristics of high compressive strength, particularly high early strength, and is suitable for being used as a material for repairing concrete cracks.
(2) The metakaolin-based polymer for repairing the concrete cracks has the advantages of easily obtained raw materials, low production cost and the like.
(3) The metakaolin-based polymer for repairing the concrete cracks has the advantages of simple preparation process, small construction difficulty and the like.
(4) The metakaolin-based geopolymer for repairing concrete cracks disclosed by the invention fully utilizes industrial solid waste-fly ash, and has certain environmental benefit.
Detailed Description
Example 1
The weight ratio of the raw materials is as follows:
the compression strength of the prepared metakaolin-based polymer and the cementing strength of the metakaolin-based polymer and the cement are shown in Table 1 when the metakaolin, the fly ash and the alkali activator are 700g and cured for 7d at 50 ℃.
Example 2
The weight ratio of the raw materials is as follows:
the compression strength of the prepared metakaolin-based polymer and the cementing strength of the metakaolin-based polymer and the cement are shown in Table 1 when the metakaolin, the fly ash and the alkali activator are 800g and cured for 7d at 50 ℃.
Example 3
The weight ratio of the raw materials is as follows:
the compression strength of the prepared metakaolin-based polymer and the cementing strength of the metakaolin-based polymer and the cement are shown in Table 1 when the metakaolin, the fly ash and the alkali activator are 900g and cured for 7d at 50 ℃.
Example 4
The weight ratio of the raw materials is as follows:
the compression strength of the prepared metakaolin-based polymer and the cementing strength of the metakaolin-based polymer and the cement are shown in Table 1 when the metakaolin, the fly ash and the alkali activator are 700g and cured for 7d at 50 ℃.
Example 5
The weight ratio of the raw materials is as follows:
the compression strength of the prepared metakaolin-based polymer and the cementing strength of the metakaolin-based polymer and the cement are shown in Table 1 when the metakaolin, the fly ash and the alkali activator are 800g and cured for 7d at 50 ℃.
Example 6
The weight ratio of the raw materials is as follows:
the compression strength of the prepared metakaolin-based polymer and the cementing strength of the metakaolin-based polymer and the cement are shown in Table 1 when the metakaolin, the fly ash and the alkali activator are 900g and cured for 7d at 50 ℃.
Table 1 results of performance testing
As can be seen from the data in Table 1, the metakaolin-based polymer has the characteristics of high compressive strength and excellent cementing property with set cement, and is suitable for being used as a concrete crack repairing material.
Claims (4)
1. The metakaolin-based geopolymer for repairing concrete cracks is characterized by being prepared by uniformly mixing and stirring the following raw materials in parts by weight: 700-900 parts of metakaolin, 100-300 parts of fly ash and 800-1000 parts of water glass.
2. The metakaolin based polymer for repairing concrete cracks of claim 1, wherein the metakaolin is prepared by calcining metakaolin at 600-900 ℃ for 2-6 hours.
3. The metakaolin-based geopolymer for repairing concrete cracks of claim 1, wherein the fly ash has an average particle size of 30 μm or less.
4. The metakaolin-based geopolymer for repairing concrete cracks of claim 1, wherein the water glass has a modulus of 1.2 to 1.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811598815.9A CN111362625A (en) | 2018-12-26 | 2018-12-26 | Metakaolin-based polymer for repairing concrete cracks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811598815.9A CN111362625A (en) | 2018-12-26 | 2018-12-26 | Metakaolin-based polymer for repairing concrete cracks |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111362625A true CN111362625A (en) | 2020-07-03 |
Family
ID=71202826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811598815.9A Pending CN111362625A (en) | 2018-12-26 | 2018-12-26 | Metakaolin-based polymer for repairing concrete cracks |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111362625A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111978022A (en) * | 2020-08-28 | 2020-11-24 | 盐城工学院 | Grouting reinforcement material for quickly repairing pavement structure and preparation method and application thereof |
-
2018
- 2018-12-26 CN CN201811598815.9A patent/CN111362625A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111978022A (en) * | 2020-08-28 | 2020-11-24 | 盐城工学院 | Grouting reinforcement material for quickly repairing pavement structure and preparation method and application thereof |
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Legal Events
| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200703 |