CN114133174B - Ultra-early-strength and high-adhesion concrete repairing method of graphene or graphene oxide - Google Patents
Ultra-early-strength and high-adhesion concrete repairing method of graphene or graphene oxide Download PDFInfo
- Publication number
- CN114133174B CN114133174B CN202111619019.0A CN202111619019A CN114133174B CN 114133174 B CN114133174 B CN 114133174B CN 202111619019 A CN202111619019 A CN 202111619019A CN 114133174 B CN114133174 B CN 114133174B
- Authority
- CN
- China
- Prior art keywords
- concrete
- repairing
- rapid hardening
- strength
- hardening material
- 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.)
- Active
Links
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
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/0072—Heat treatment
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/52—Multiple coating or impregnating multiple coating or impregnating with the same composition or with compositions only differing in the concentration of the constituents, is classified as single coating or impregnation
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
- C04B41/61—Coating or impregnation
- C04B41/70—Coating or impregnation for obtaining at least two superposed coatings having different compositions
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/005—Methods or materials for repairing pavings
-
- 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
- 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
Abstract
The invention discloses a method for repairing concrete with ultra-early strength and high adhesion of graphene or graphene oxide. The method comprises the following steps: 1. performing chiseling and surface cleaning treatment on the surface defect part of the old concrete; 2. spraying a layer of G/GO dispersion liquid on the surface of the treated concrete; 3. and (3) carrying out microwave heating on the surface of the concrete sprayed with the G/GO dispersion liquid, covering with the rapid hardening material, carrying out microwave curing on the rapid hardening material, and covering the rapid hardening material with a heat insulation material to finish the concrete repairing work. The invention is suitable for emergency repair under low-temperature and normal-temperature environments, the super early strength performance of the rapid hardening material is exerted through the thermal excitation effect of the microwave, the strengthening and toughening effect of the G/GO on the repair interface is exerted, the bonding strength of the rapid hardening repair material and the old concrete surface is improved, the agglomeration problem of the G/GO directly added into the concrete is avoided, the use amount of the G/GO is less, and the economical efficiency is good.
Description
Technical Field
The invention belongs to a high-adhesion technology of a concrete interface, and particularly relates to a method for repairing super-early-strength and high-adhesion concrete by enhancing the interface adhesion strength through G/GO and exciting the concrete by microwave heating.
Background
Most modern buildings take cement-based materials as main building materials, and due to construction defects, service damage, natural aging, environmental change and the like of the buildings, the concrete of the buildings has defects of cellular pitted surface, peeling, cracks and the like. The traditional concrete defect repairing method has the defects that the bonding strength of new and old materials is low, the setting and hardening time of the polymer modified portland cement-based repairing material is long, even if a quick-hardening early-strength agent is added, the strength development of the repairing material is still slow in a low-temperature environment, and the method is not suitable for engineering first-aid repair, especially for engineering disease treatment in a short skylight period in the low-temperature environment.
Graphene or graphene oxide is a nano-sheet layer material, and a large number of functional groups such as-OH, -COOH, -CO and the like are contained on the nano-sheet layer. C in cement 3 S、C 2 S、C 3 A, etc. react to form ettringite, calcium sulfoaluminate monohydrate, calcium hydroxide, calcium silicate hydrate, etc., and these hydration products react with oxygen-containing gasThe functional groups are mutually templates and mutually gathered, interwoven and interpenetrated, so that not only can the toughness of the concrete be improved, but also the concrete structure can be more compact. At present, graphene or graphene oxide is often added into concrete in an additive mode so as to achieve the purposes of improving the toughness of the concrete and enhancing an interface transition region. However, graphene or graphene oxide is a nano-sheet layer material, is easy to agglomerate due to strong van der waals force of the graphene or graphene oxide, and is not easy to disperse uniformly when added into concrete. And the graphene or graphene oxide is expensive, and the cost is very high when the graphene or graphene oxide is directly doped into a concrete rapid hardening material. Meanwhile, the microwave heating has the advantages of rapid and uniform heating, convenience and rapidness in operation, environmental friendliness and wide application environment, and can assist the rapid hardening material in rapidly repairing concrete in various environments.
Disclosure of Invention
Therefore, in order to solve the above-mentioned disadvantages, the present invention provides a method for repairing a super-early-strength high-adhesion concrete, in which graphene or graphene oxide (hereinafter referred to as G/GO) is used to increase the interface adhesion strength and microwave heating is used to excite a rapid-hardening material. The rapid hardening material has the advantages that the ultra-early strength performance of the rapid hardening material is exerted through the thermal excitation effect of the microwave, the reinforcing and toughening effects of the G/GO on the repaired interface are exerted, the surface bonding strength of the rapid hardening repair material and old concrete is improved, the agglomeration problem that the G/GO is directly added into the concrete is avoided, the using amount of the G/GO is greatly reduced, and the defect that the rapid hardening material is slowly hardened in a low-temperature environment is overcome.
The invention is realized in such a way, a G/GO super early strength high-adhesion concrete repairing method is constructed, is used for repairing the surface defects of old concrete, and is characterized in that: the surface repairing method comprises the following steps;
step 1, performing chiseling treatment on the surface of the old concrete, and cleaning up impurities such as surface laitance, broken stones, dust and the like;
step 2, uniformly spraying G/GO dispersion liquid on the surface of the old concrete in the step 1 to form a pretreatment repairing interface, and heating the repairing interface by using a microwave heating device to improve the repairing interface and the adjacent old concrete;
and 3, covering the concrete repairing interface obtained in the step 2 with a concrete rapid hardening material, carrying out microwave heating maintenance on the concrete rapid hardening material, covering a heat insulation material for the curing age, and completing the repairing of the concrete surface.
The ultra-early-strength and high-adhesion concrete repairing method of graphene or graphene oxide is characterized by comprising the following steps of: step 1, the concrete is as follows: the strength of the concrete is C10-C80.
The G/GO super early strength high-adhesion concrete repairing method is characterized by comprising the following steps: and (2) in the step (1), the roughening treatment depth of the concrete surface is 1-20mm.
The G/GO ultra-early-strength high-adhesion concrete repairing method is characterized by comprising the following steps of: step 2, the spraying density is 10-500g/m 2 。
The G/GO super early strength high-adhesion concrete repairing method is characterized by comprising the following steps: step 2, the microwave heating temperature rising method is to use a special microwave heating device to cover the repairing interface, the microwave output power is 300-30000W, and the heating time is 5-300s; the temperature of the repaired interface of the old concrete is increased by 20-50 ℃.
The G/GO super early strength high-adhesion concrete repairing method is characterized by comprising the following steps: step 2, the G/GO is made of one or more of the following materials: single-layer graphene, multi-layer graphene, single-layer graphene oxide, multi-layer graphene oxide and few-layer graphene oxide, wherein the concentration is 0.01-100mg/L; the dispersant may be one or more of: sodium dodecylbenzenesulfonate, polyacrylic acid polymer, cetyltrimethylammonium bromide, gum arabic powder, methyl orange, sodium dodecylsulfate, dipropylene glycol methyl ether, diethylene glycol methyl ether, dipropylene glycol ethyl ether, diethylene glycol ethyl ether, dipropylene glycol propyl ether, etc.; the dispersion medium is water.
The G/GO super early strength high-adhesion concrete repairing method is characterized by comprising the following steps: the preparation method of the rapid hardening material in the step 3 comprises the following steps: measuring and adding fine aggregate, cement, fly ash, redispersible latex powder and an early strength agent, stirring for 10-60s, and then adding water and a water reducing agent, wherein the early strength agent is one or more of the following components: chloride, sulfate, amorphous calcium aluminate, sulphoaluminate, aluminum hydroxide colloidal carbonate and triethanolamine; continuously stirring for 60-180s to obtain a rapid hardening material for repairing; the initial setting time of the rapid hardening material is 20min, and the final setting time is 32min.
The G/GO ultra-early-strength high-adhesion concrete repairing method is characterized by comprising the following steps of: and 3, the microwave heating maintenance method comprises the following steps: covering the surface of the rapid hardening material with a special microwave heating device, wherein the microwave output power is 300-40000W, and the microwave heating time is 0.5-30min, so that the temperature of the concrete rapid hardening material is raised to 20-50 ℃, and the rapid hardening material is covered with a heat insulation material.
The invention has the following advantages:
1) The invention provides a method for repairing super early strength and high-adhesion concrete by using G/GO, which avoids the defects of quick hydration of a quick-hardening material for common repair and low adhesion strength of old concrete, and solves the problem of slow hardening of the quick-hardening material in a low-temperature environment by the excitation action of microwave heating twice before and after use. The method has the advantages of rapidly improving the strength of the repaired concrete, closely combining with the old concrete and having excellent effect on the engineering environment with the temperature of more than 10 ℃ below zero. The method ensures the repairing quality and efficiency of the concrete, is simple to operate, and is green and environment-friendly.
2) According to the invention, the reinforcing and toughening effects of G/GO are exerted by spraying the G/GO to the repaired interface, the problem of uneven dispersion of G/GO is avoided, and the utilization rate of G/GO is improved.
Detailed Description
The present invention will be described in detail below, and technical solutions in embodiments of the present invention will be clearly and completely described below. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a method for repairing super early-strength and high-adhesion concrete by improving G/GO to enhance interface bonding strength and heating with the assistance of microwave, which is implemented specifically as follows:
example 1: under the environment of 10 ℃, performing chiseling treatment on the surface of C50 old concrete, and cleaning up impurities such as floating pulp, broken stones, dust and the like on the surface;
uniformly spraying G/GO dispersion liquid on the surface of old concrete, wherein the spraying density is 50G/m 2 And forming a pre-treatment bonding interface. Wherein the G/GO dispersion liquid forms a single-layer graphene oxide with the concentration of 2mg/L.
And (3) heating the pretreated bonding interface by using a microwave heating mode, wherein the heating power is 1000W, the surface temperature is increased to 30 ℃ (± 1 ℃, the same applies below), then quickly covering with the concrete rapid-hardening material, heating the rapid-hardening material by using microwaves, the heating power is 1200W, the surface temperature is increased to 30 ℃, and covering the rapid-hardening material with a heat insulation material. Wherein, the mixing proportion of the rapid hardening material is shown in table 1.
TABLE 1 mixing ratio of rapid hardening materials
Example 2: and (3) pretreating the bonding interface by adopting microwave heating, wherein the heating power is 1000W, the surface temperature is increased to 40 ℃, then, quickly covering the bonding interface with a concrete rapid hardening material, heating the rapid hardening material by using microwave, the heating power is 1200W, the surface temperature is increased to 30 ℃, and covering the rapid hardening material with a heat insulation material. Other environmental conditions and test parameters were the same as in example 1.
Example 3: and (3) pretreating the bonding interface by microwave heating, wherein the heating power is 1000W, the surface temperature is increased to 30 ℃, then the rapid hardening material of the concrete is quickly covered on the bonding interface, the microwave heating is used, the heating power is 1200W, the surface temperature is increased to 40 ℃, and the rapid hardening material is covered on the heat insulation material. Other environmental conditions and test parameters were the same as in example 1.
Example 4: and (3) pretreating a bonding interface by adopting microwave heating, wherein the heating power is 1000W, the surface temperature is increased to 30 ℃, then, the rapid hardening material of the concrete is quickly covered, the rapid hardening material is heated by using microwave, the heating power is 1200W, the surface temperature is increased to 50 ℃, and a heat insulation material is covered on the rapid hardening material. Other environmental conditions and test parameters were the same as in example 1.
Example 5: uniformly spraying G/GO dispersion liquid on the surface of old concrete, wherein the spraying density is 100G/m 2 And forming a pre-treatment bonding interface. Wherein the G/GO dispersion liquid forms a single-layer graphene oxide with the concentration of 2mg/L. Other environmental conditions and test parameters were the same as in example 3.
Example 6: the surface of the old C30 concrete was roughened, and the environmental conditions and test parameters were the same as those in example 3.
Example 7: the surface of the old C80 concrete was roughened, and other environmental conditions and test parameters were the same as those in example 3.
Example 8: and (3) pretreating a bonding interface by microwave heating, wherein the heating power is 1000W, the surface temperature is increased to 20 ℃, then, quickly covering the bonding interface with a concrete rapid-hardening material, heating by microwave at the heating power of 1200W, the surface temperature is increased to 20 ℃, and covering the rapid-hardening material with a heat-insulating material. Other environmental conditions and test parameters were the same as in example 7.
Comparative example 0: the same procedure as in example 7 was repeated except that the bonding interface was not pretreated by microwave heating and the concrete rapid hardening material was quickly covered and that microwave heating was not applied to the rapid hardening material.
Comparative example 00: under the environment of 10 ℃, the single-layer graphene oxide dispersion liquid is not sprayed on the roughened old C50 concrete, and the rapid-hardening material is directly covered on the roughened old C50 concrete without microwave heating treatment;
comparative example 000: at room temperature, spraying a monolayer graphene oxide dispersion liquid on the old C50 concrete after the scabbling treatment, heating to 30 ℃ by using microwave heating, covering with a rapid hardening material, and heating to 30 ℃ by using microwave heating.
14d bonding tensile strength test is carried out on the examples and the comparative examples, and 3h and 28d compressive strength test is carried out on the rapid hardening material. And (4) testing the 14d bonding tensile strength, wherein the preparation of a test instrument and a test piece refers to JGJ/T70-2009. The base concrete was used as the old concrete in the examples and comparative examples, and the adhesive mortar was a quick-hardening material. In the 3h and 28d compressive strength tests, the preparation and test procedures of the test piece refer to the national standard GB/T17671-1999, before and after the test piece is formed, microwave heating is respectively used for raising the temperature of the die and the rapid hardening material to the corresponding temperature, and the thermal insulation material is used for covering the rapid hardening material.
The quick hardening materials of the above examples and comparative examples were tested for their resilience strength by the following specific procedures: preparing old concrete plates with corresponding strength grades, wherein the length, width and height are 30 x 15cm, heating the surface of the concrete plate to a corresponding temperature by adopting microwave, covering the surface with a rapid hardening material with the thickness of 5cm, heating the surface by adopting microwave to increase the temperature, and covering the rapid hardening material with a heat insulation material. And after the specified curing age is reached, measuring the rebound value of the rapid hardening material by using a low-strength rebound tester, and converting to obtain the strength of the rapid hardening material. The test results are shown in table 2:
TABLE 2 Strength test results of examples and comparative examples
The data in Table 2 show that the improvement of the strength grade of concrete, the concentration of G/GO and the spraying density is beneficial to improving the interface bonding strength of old concrete and a quick hardening material; meanwhile, except the strength grade factor of the concrete, the microwave heating can be used for improving the 3h strength of the obvious quick-hardening material, and the influence on the 28d strength is small. Therefore, after G/GO is sprayed on the interface of old concrete, microwave heating is used before and after the quick hardening material is covered, and the interface bonding strength and the early strength of the concrete are improved.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. A method for repairing ultra-early-strength and high-adhesion concrete by graphene or graphene oxide is used for repairing surface defects of old concrete, and is characterized in that: the surface repairing method comprises the following steps;
step 1, performing chiseling treatment on the surface of the old concrete, and cleaning up floating slurry, broken stones and dust impurities on the surface of the old concrete;
step 2, uniformly spraying the G/GO dispersion liquid on the surface of the old concrete in the step 1 to form a pre-treatment repairing interface, heating the repairing interface by using a microwave heating device, and increasing the temperature of the repairing interface and the temperature of the adjacent old concrete;
step 3, covering the concrete repairing interface in the step 2 with a concrete rapid hardening material, carrying out microwave heating maintenance on the concrete rapid hardening material, covering a heat insulation material for a curing age, and completing repairing on the concrete surface; the preparation method of the rapid hardening material comprises the following steps: measuring and adding fine aggregate, cement, fly ash, redispersible latex powder and an early strength agent, stirring for 10-60s, and then adding water and a water reducing agent, wherein the early strength agent is one or more of the following components: chloride, sulfate, amorphous calcium aluminate, sulphoaluminate, aluminum hydroxide colloidal carbonate and triethanolamine; continuously stirring for 60-180s to obtain a rapid hardening material for repairing; the initial setting time of the rapid hardening material is 20min, and the final setting time is 32min;
the microwave heating maintenance method comprises the following steps: covering the surface of the rapid hardening material with a special microwave heating device, outputting microwave with power of 300-40000W, and heating for 0.5-30min to raise the temperature of the concrete rapid hardening material to 20-50 deg.C, and covering the heated rapid hardening material with heat insulating material for heat preservation and maintenance.
2. The method for repairing ultra-early-strength and high-adhesion concrete by using graphene or graphene oxide according to claim 1, wherein the method comprises the following steps: and 1, concrete with the concrete strength grade of C10-C80.
3. The method for repairing ultra-early-strength and high-adhesion concrete by using graphene or graphene oxide according to claim 1, wherein the method comprises the following steps: and step 1, the roughening treatment depth of the concrete surface is 1-20mm.
4. The method for repairing ultra-early-strength and high-adhesion concrete by using graphene or graphene oxide according to claim 1, wherein the method comprises the following steps: step 2, the spraying density is 10-500g/m 2 。
5. The method for repairing the ultra-early-strength and high-adhesion concrete by using the graphene or the graphene oxide according to claim 1, wherein the method comprises the following steps: step 2, the microwave heating temperature rising method is that a special microwave heating device is covered on a repairing interface, the microwave output power is 300-30000W, and the heating time is 5-300s; the temperature of the repaired interface and the nearby old concrete is increased by 20-50 ℃.
6. The method for repairing the ultra-early-strength and high-adhesion concrete by using the graphene or the graphene oxide according to claim 1, wherein the method comprises the following steps: step 2, the G/GO is made of one or more of the following materials: single-layer graphene, multi-layer graphene, single-layer graphene oxide, multi-layer graphene oxide and few-layer graphene oxide, wherein the concentration is 0.01-100mg/L; the dispersant is one or more of the following: sodium dodecylbenzene sulfonate, sodium dodecylbenzene sulfate, polyacrylic acid polymer, hexadecyl trimethyl ammonium bromide, arabic gum powder, methyl orange, sodium dodecyl sulfate, dipropylene glycol methyl ether, diethylene glycol methyl ether, dipropylene glycol ethyl ether, diethylene glycol ethyl ether and dipropylene glycol propyl ether; the dispersion medium is water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111619019.0A CN114133174B (en) | 2021-12-27 | 2021-12-27 | Ultra-early-strength and high-adhesion concrete repairing method of graphene or graphene oxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111619019.0A CN114133174B (en) | 2021-12-27 | 2021-12-27 | Ultra-early-strength and high-adhesion concrete repairing method of graphene or graphene oxide |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114133174A CN114133174A (en) | 2022-03-04 |
| CN114133174B true CN114133174B (en) | 2023-02-28 |
Family
ID=80383509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111619019.0A Active CN114133174B (en) | 2021-12-27 | 2021-12-27 | Ultra-early-strength and high-adhesion concrete repairing method of graphene or graphene oxide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114133174B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102408216A (en) * | 2011-08-02 | 2012-04-11 | 长安大学 | Microwave heating super early strength cement concrete pavement repair material and preparation method thereof |
| CN107129235A (en) * | 2017-06-23 | 2017-09-05 | 沈阳建筑大学 | A kind of method of utilization graphene oxide intensifying regenerating concrete |
| KR101964367B1 (en) * | 2018-07-04 | 2019-04-02 | 김형진 | Composition for repairing and reinforcing concrete structure and method for repairing and reinforcing concrete structure therewith |
-
2021
- 2021-12-27 CN CN202111619019.0A patent/CN114133174B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102408216A (en) * | 2011-08-02 | 2012-04-11 | 长安大学 | Microwave heating super early strength cement concrete pavement repair material and preparation method thereof |
| CN107129235A (en) * | 2017-06-23 | 2017-09-05 | 沈阳建筑大学 | A kind of method of utilization graphene oxide intensifying regenerating concrete |
| KR101964367B1 (en) * | 2018-07-04 | 2019-04-02 | 김형진 | Composition for repairing and reinforcing concrete structure and method for repairing and reinforcing concrete structure therewith |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114133174A (en) | 2022-03-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Nurruddin et al. | Methods of curing geopolymer concrete: A review | |
| Thomas et al. | Alkali-activated slag cement concrete | |
| Wang et al. | A novel gypsum-based self-leveling mortar produced by phosphorus building gypsum | |
| WO2020063203A1 (en) | High-strength light-weight aggregate concrete and preparation method therefor | |
| CN106348643B (en) | Modified concrete swelling agent | |
| CN106348644B (en) | Composite expansive agents for concrete | |
| CN112250355A (en) | Alkali-activated fly ash/slag recycled concrete and preparation method thereof | |
| CN107162535A (en) | A kind of light high-strength haydite concrete and preparation method thereof | |
| CN112299795B (en) | Recycled concrete and preparation method thereof | |
| CN108793905A (en) | A kind of mending mortar and preparation method thereof and the application in precast concrete repairing | |
| CN105314956A (en) | Geopolymer large-size concrete and preparation method thereof | |
| CN111646764A (en) | Whisker modified hydrated magnesium silicate material and preparation method and application thereof | |
| CN113800829A (en) | Early-strength type ultrahigh-ductility geopolymer concrete material and preparation method thereof | |
| CN115057670A (en) | Fast-hardening high-ductility inorganic sealing mortar | |
| CN114133174B (en) | Ultra-early-strength and high-adhesion concrete repairing method of graphene or graphene oxide | |
| Jin et al. | Influence of curing temperature on freeze-thaw resistance of limestone powder hydraulic concrete | |
| CN116143483A (en) | Preparation method of cement-based grouting material | |
| CN112062514B (en) | Method for preparing 3D printing ink from waste 3D printing concrete | |
| CN105859234A (en) | Rapid repair mortar and repair process special for autoclaved aerated concrete slab | |
| CN114163258B (en) | Method for enhancing concrete interface bonding force by graphene/graphene oxide and silica fume | |
| Lei et al. | Study of fly ash-slag geopolymer mortar as a rapid strengthening agent for concrete structures | |
| CN116874225B (en) | Glue-reducing type concrete water reducer and preparation method and application thereof | |
| Chen et al. | Comparative study on mechanical properties and microstructure development of ultra-high performance concrete incorporating phosphorous slag under different curing regimes | |
| CN115180915B (en) | High-performance concrete and preparation method thereof | |
| CN115368067B (en) | Geopolymer-based anti-cracking molding sand and preparation method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |