CN112521106A - Water-blocking anti-cracking high-toughness bonding reinforcing and repairing material and preparation method thereof - Google Patents
Water-blocking anti-cracking high-toughness bonding reinforcing and repairing material and preparation method thereof Download PDFInfo
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- CN112521106A CN112521106A CN202011584372.5A CN202011584372A CN112521106A CN 112521106 A CN112521106 A CN 112521106A CN 202011584372 A CN202011584372 A CN 202011584372A CN 112521106 A CN112521106 A CN 112521106A
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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
- 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
- C04B28/02—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 hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/72—Repairing or restoring existing buildings or building 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
Abstract
The invention discloses a water-blocking anti-cracking high-toughness bonding reinforcing repair material which is composed of a base material and synthetic fibers, and is characterized in that the base material comprises the following raw materials in percentage by mass: 25 to 40 percent of cement, 25 to 35 percent of fly ash, 1 to 3 percent of silica fume, 10 to 25 percent of quartz medium sand, 10 to 23 percent of water, 0.2 to 1.0 percent of xanthan gum, 1 to 2 percent of water repellent, 0.4 to 1.0 percent of attapulgite, 3 to 10 percent of rubber powder and 0.5 to 1.2 percent of water reducing agent; the synthetic fibers account for 1% -3% of the total volume of the base material. The invention provides a water-blocking anti-cracking high-toughness bonding reinforcing repair material, which is environment-friendly, non-toxic and harmless, has high chloride ion permeability resistance coefficient, has no corrosive effect on the existing structure, can be used for reinforcing and repairing the building structures such as reinforced concrete, beams, columns, walls and the like, and has wide application range. The ultimate tensile strain of the invention is not less than 5%, the bonding strength is not less than 1.5Mpa, the chloride ion permeation resistance grade is more than four, and the permeation resistance grade is more than 1.5 Mpa.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to a water-blocking anti-cracking, high-toughness and high-cohesiveness fiber-reinforced cement-based repairing material and a preparation method thereof.
Background
Masonry structures have long history, are one of the main forms of the existing structures at present, and play an important role in urban buildings in China, particularly masonry structures in the last 80-90 th century have fast development, civil buildings such as houses and office buildings and the like adopt brick walls for bearing load in large quantities, public buildings such as movie theaters, dining halls and the like and industrial buildings such as small and medium single-storey factory buildings and multi-storey light industrial factory buildings also adopt masonry structures widely. According to statistics, the annual output of bricks in the country in 1980 is 1566 hundred million blocks, and the annual output is increased to 6200 hundred million blocks in 1996, which is the sum of the annual output of bricks in other countries in the world. A large number of old masonry structure houses which are used for 30-40 years and still used at present exist in China. The existing masonry structure house in China has obvious defects of poor integrity and low building bearing capacity due to the long-term construction age, limited design level at that time and other reasons.
Along with the increase of service time, the phenomena of material aging and strength reduction of mortar strength and brick strength occur, the safety and reliability of the structure are greatly reduced, and in addition, because the original mortar does not have waterproof performance, the outdoor environment is subjected to rain and snow erosion for a long time, melted water can invade the interior of a wall body, and the durability problems of frost heaving and the like are easily generated after the temperature is reduced. A large number of early masonry structures need to be reinforced and transformed, the safety and the reliability of the masonry structures are improved, and the normal use of the masonry structures is guaranteed. Meanwhile, in the use process of the masonry structure, due to the change of building functions (such as reconstruction or extension) and the like, the bearing capacity of the original house is insufficient, and the like, so that the maintenance and reinforcement scale of the old brick masonry structure is continuously enlarged; for newly built masonry structures, building damage and the like caused by improper design and construction or construction errors and the like also need to be repaired and reinforced.
Therefore, with the continuous improvement of many researchers, a bonding reinforcing and repairing material with high crack resistance, high toughness and certain waterproof performance, which ensures the bonding performance between the reinforcing and repairing material and the existing structure, and aims at the defects of the existing reinforcing and repairing material, the invention provides the bonding reinforcing and repairing material with high crack resistance and high toughness and the preparation method thereof.
Disclosure of Invention
The invention aims to provide a water-blocking anti-cracking high-toughness bonding reinforcing repair material and a preparation method thereof, aiming at the defects of the prior art, and the material has the advantages of high crack resistance, high toughness, waterproof performance and the like.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the water-blocking anti-cracking high-toughness bonding reinforcing repair material is composed of a base material and synthetic fibers, and is characterized in that the base material comprises the following raw materials in percentage by mass: 25 to 40 percent of cement, 25 to 35 percent of fly ash, 1 to 3 percent of silica fume, 10 to 25 percent of quartz medium sand, 10 to 23 percent of water, 0.2 to 1.0 percent of xanthan gum, 1 to 2 percent of water repellent, 0.4 to 1.0 percent of attapulgite, 3 to 10 percent of rubber powder and 0.5 to 1.2 percent of water reducing agent; the synthetic fibers account for 1% -3% of the total volume of the base material.
Preferably, the cement is ordinary portland cement 42.5.
Preferably, the fly ash is first-grade fly ash, the specific surface area is 4600cm2/g, and the density is 2.04g/cm 2.
Preferably, the fineness of the silica fume is 20000 meshes.
Preferably, the water reducing agent is a solid polycarboxylic acid high-efficiency water reducing agent.
Preferably, the type of the water repellent is JX-II.
Preferably, the rubber powder can be used as re-dispersible latex powder.
Optionally, the xanthan gum is industrial xanthan gum.
Preferably, the fineness of the attapulgite is 1000 meshes.
Preferably, the synthetic fibers are short fibers, have the length of 1-18 mm, and consist of one or more of polyvinyl alcohol fibers, polyethylene fibers, polypropylene fibers and polyformaldehyde fibers.
The preparation method of the water-blocking anti-cracking high-toughness bonding reinforcing repair material comprises the following steps:
(1) the cement, the fly ash, the silica fume, the quartz medium sand, the rubber powder, the water repellent, the water reducing agent, the xanthan gum and the attapulgite are uniformly mixed according to the proportion and put into a forced mixer to be stirred for 1 minute.
(2) Adding water in a certain amount into a stirrer in proportion, stirring for 2 minutes, adding synthetic fibers in a certain amount, and stirring for 5 minutes to obtain the water-blocking anti-cracking high-toughness bonding, reinforcing and repairing material.
The invention has the beneficial effects that:
the invention provides a water-blocking anti-cracking high-toughness bonding reinforcing repair material, which is environment-friendly, non-toxic and harmless, has high chloride ion permeability resistance coefficient, has no corrosive effect on the existing structure, can be used for reinforcing and repairing the building structures such as reinforced concrete, beams, columns, walls and the like, and has wide application range. The ultimate tensile strain of the invention is not less than 5%, the bonding strength is not less than 1.5Mpa, the chloride ion permeation resistance grade is more than four, and the permeation resistance grade is more than 1.5 Mpa.
Detailed Description
The present invention will be further specifically described with reference to the following examples.
Example 1
The water-blocking anti-cracking high-toughness bonding reinforcing repair material is composed of a base material and synthetic fibers, and is characterized in that the base material comprises the following raw materials in percentage by mass: 25% of cement, 35% of fly ash, 3% of silica fume, 20% of quartz medium sand, 12% of water, 0.2% of xanthan gum, 1% of water repellent, 0.3% of attapulgite, 3% of rubber powder and 0.5% of water reducing agent; the synthetic fibers account for 2.5 percent of the polypropylene fibers of the total volume of the base material.
The cement, the fly ash, the silica fume, the quartz medium sand, the rubber powder, the water repellent, the water reducing agent, the xanthan gum and the attapulgite are uniformly mixed according to the proportion and put into a forced mixer to be stirred for 1 minute, then water is added to be stirred for 2 minutes, and finally synthetic fiber is added to be stirred for 5 minutes, so that the product of the embodiment can be obtained.
As a result of inspection, in this example, the 3d equivalent bending toughness was 85.7kJ/m and the 60d equivalent bending toughness was 65.2 kJ/m; 3d equivalent bending strength is 8.0N/mm, 60d equivalent bending strength is 11.0N/mm; 3d bending strength 12.8N/mm, 60d bending strength 18.5N/mm; 3d compressive strength 25.8N/mm, 60d compressive strength 68.1N/mm; the anti-permeability grade is 1.5 MPa; the grade of chloride ion penetration resistance is IV grade, and the bonding strength with a base material (masonry) is 1.8 MPa; the bonding strength with a base material (concrete) is 2.2 MPa.
Example 2
The water-blocking anti-cracking high-toughness bonding reinforcing repair material is composed of a base material and synthetic fibers, and is characterized in that the base material comprises the following raw materials in percentage by mass: 26% of cement, 33% of fly ash, 2% of silica fume, 17% of quartz medium sand, 13% of water, 1.0% of xanthan gum, 1.2% of water repellent, 0.8% of attapulgite, 5.2% of rubber powder and 0.8% of water reducer; and the synthetic fibers account for 1.0 percent of polyethylene fibers of the total volume of the base material.
The cement, the fly ash, the silica fume, the quartz medium sand, the rubber powder, the water repellent, the water reducing agent, the xanthan gum and the attapulgite are uniformly mixed according to the proportion and put into a forced mixer to be stirred for 1 minute, then water is added to be stirred for 2 minutes, and finally synthetic fiber is added to be stirred for 5 minutes, so that the product of the embodiment can be obtained.
As a result of inspection, in this example, the 3d equivalent bending toughness was obtained by high-speed transformation at 125.1kJ/m, and the 60d equivalent bending toughness was obtained by high-speed transformation at 110.8 kJ/m; 3d equivalent bending strength is 9.1N/mm, 60d equivalent bending strength is 13.0N/mm; 3d bending strength 13.2N/mm, 60d bending strength 17.9N/mm; 3d compressive strength 27.3N/mm, 60d compressive strength 65.4N/mm; the anti-permeability grade is 1.5 MPa; the grade of chloride ion penetration resistance is IV grade, and the bonding strength with a base material (masonry) is 2.5 MPa; the bonding strength with a base material (concrete) is 2.8 MPa.
Example 3
The water-blocking anti-cracking high-toughness bonding reinforcing repair material is composed of a base material and synthetic fibers, and is characterized in that the base material comprises the following raw materials in percentage by mass: 32% of cement, 22% of fly ash, 1% of silica fume, 20% of quartz medium sand, 15% of water, 0.7% of xanthan gum, 1.0% of water repellent, 0.5% of attapulgite, 7% of rubber powder and 0.8% of water reducer; the synthetic fibers account for 1.5 percent of polyethylene fibers of the total volume of the base material.
The cement, the fly ash, the silica fume, the quartz medium sand, the rubber powder, the water repellent, the water reducing agent, the xanthan gum and the attapulgite are uniformly mixed according to the proportion and put into a forced mixer to be stirred for 1 minute, then water is added to be stirred for 2 minutes, and finally synthetic fiber is added to be stirred for 5 minutes, so that the product of the embodiment can be obtained.
As a result of inspection, in this example, the 3d equivalent bending toughness was obtained by high-speed transportation at 64.3kJ/m, and the 60d equivalent bending toughness was obtained by high-speed transportation at 52.7 kJ/m; 3d equivalent bending strength is 7.3N/mm, 60d equivalent bending strength is 8.6N/mm; 3d bending strength 12.4N/mm, 60d bending strength 14.5N/mm; 3d compressive strength 30.5N/mm, 60d compressive strength 65.4N/mm; the anti-permeability grade is 1.5 MPa; the grade of chloride ion penetration resistance is IV grade, and the bonding strength with a base material (masonry) is 1.8 MPa; the bonding strength with a base material (concrete) is 2.1 MPa.
Example 4
The water-blocking anti-cracking high-toughness bonding reinforcing repair material is composed of a base material and synthetic fibers, and is characterized in that the base material comprises the following raw materials in percentage by mass: 40% of cement, 28% of fly ash, 1% of silica fume, 10% of quartz medium sand, 10% of water, 0.2% of xanthan gum, 1% of water repellent, 0.4% of attapulgite, 8.2% of rubber powder and 1.2% of water reducing agent; the synthetic fibers consist of polyethylene fibers accounting for 0.5 percent of the total volume of the base material and polyvinyl alcohol fibers accounting for 1.0 percent of the total volume of the base material.
The cement, the fly ash, the silica fume, the quartz medium sand, the rubber powder, the water repellent, the water reducing agent, the xanthan gum and the attapulgite are uniformly mixed according to the proportion and put into a forced mixer to be stirred for 1 minute, then water is added to be stirred for 2 minutes, and finally synthetic fiber is added to be stirred for 5 minutes, so that the product of the embodiment can be obtained.
As a result of inspection, in this example, the 3d equivalent bending toughness was obtained by high pressure labor at 105.8kJ/m, and the 60d equivalent bending toughness was obtained by high pressure labor at 89.2 kJ/m; 3d equivalent bending strength is 7.9N/mm, 60d equivalent bending strength is 8.6N/mm; 3d bending strength 12.8N/mm, 60d bending strength 16.9N/mm; 3d compressive strength 37.1N/mm, 60d compressive strength 70.1N/mm; the anti-permeability grade is 1.5 MPa; the chlorine ion penetration resistance grade is V grade, and the bonding strength with a base material (masonry) is 2.8 MPa; the bonding strength with a base material (concrete) is 3.2 MPa.
Example 5
The water-blocking anti-cracking high-toughness bonding reinforcing repair material is composed of a base material and synthetic fibers, and is characterized in that the base material comprises the following raw materials in percentage by mass: 32% of cement, 27% of fly ash, 2% of silica fume, 18% of quartz medium sand, 15% of water, 1.0% of xanthan gum, 2% of water repellent, 0.4% of attapulgite, 1.6% of rubber powder and 1.0% of water reducing agent; the synthetic fiber is composed of polypropylene fiber accounting for 2.0 percent of the total volume of the base material and polyformaldehyde fiber accounting for 0.5 percent of the total volume of the base material.
The cement, the fly ash, the silica fume, the quartz medium sand, the rubber powder, the water repellent, the water reducing agent, the xanthan gum and the attapulgite are uniformly mixed according to the proportion and put into a forced mixer to be stirred for 1 minute, then water is added to be stirred for 2 minutes, and finally synthetic fiber is added to be stirred for 5 minutes, so that the product of the embodiment can be obtained.
As a result of inspection, in this example, the 3d equivalent bending toughness was obtained by high yield transformation at 84.6kJ/m, and the 60d equivalent bending toughness was obtained by high yield transformation at 81.5 kJ/m; 3d equivalent bending strength is 6.5N/mm, 60d equivalent bending strength is 8.2N/mm; 3d bending strength 6.8N/mm, 60d bending strength 11.4N/mm; 3d compressive strength 29.8N/mm, 60d compressive strength 54.9N/mm; the anti-permeability grade is 1.5 MPa; the grade of chloride ion penetration resistance is IV grade, and the bonding strength with a base material (masonry) is 1.5 MPa; the bonding strength with a base material (concrete) is 1.9 MPa.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (10)
1. The water-blocking anti-cracking high-toughness bonding reinforcing repair material is composed of a base material and synthetic fibers, and is characterized in that the base material comprises the following raw materials in percentage by mass: 25 to 40 percent of cement, 25 to 35 percent of fly ash, 1 to 3 percent of silica fume, 10 to 25 percent of quartz medium sand, 10 to 23 percent of water, 0.2 to 1.0 percent of xanthan gum, 1 to 2 percent of water repellent, 0.4 to 1.0 percent of attapulgite, 3 to 10 percent of rubber powder and 0.5 to 1.2 percent of water reducing agent; the synthetic fibers account for 1% -3% of the total volume of the base material.
2. The water-blocking, crack-resistant, high-toughness bonding, reinforcing and repairing material as claimed in claim 1, wherein said cement is Portland cement 42.5.
3. The water-blocking, crack-resistant, high-toughness bonding, reinforcing and repairing material as claimed in claim 1, wherein the fly ash is first-grade fly ash, the specific surface area is 4600cm2/g, and the density is 2.04g/cm 2.
4. The water-blocking anti-cracking high-toughness bonding, reinforcing and repairing material as claimed in claim 1, wherein the silica fume fineness is 20000 meshes.
5. The water-blocking anti-cracking high-toughness bonding, reinforcing and repairing material as claimed in claim 1, wherein the water reducing agent is a solid polycarboxylic acid type high-efficiency water reducing agent.
6. The water-blocking, anti-cracking, high-toughness bonding, reinforcing and repairing material as claimed in claim 1, wherein the type of the water repellent is JX-II.
7. The water-blocking, crack-resistant, high-toughness, bonding, reinforcing and repairing material as claimed in claim 1, wherein the rubber powder is re-dispersible latex powder, and the xanthan gum is industrial xanthan gum.
8. The water-blocking crack-resistant high-toughness bonding, reinforcing and repairing material as claimed in claim 1, wherein the fineness of the attapulgite is 1000 meshes.
9. The water-blocking anti-cracking high-toughness bonding, reinforcing and repairing material as claimed in claim 1, wherein the synthetic fibers are short fibers, have a length of 1-18 mm, and are composed of one or more of polyvinyl alcohol fibers, polyethylene fibers, polypropylene fibers and polyformaldehyde fibers.
10. The preparation method of the water-blocking crack-resistant high-toughness bonding, reinforcing and repairing material as claimed in claims 1-9, characterized by comprising the following steps:
(1) the cement, the fly ash, the silica fume, the quartz medium sand, the rubber powder, the water repellent, the water reducing agent, the xanthan gum and the attapulgite are uniformly mixed according to the proportion and put into a forced mixer to be stirred for 1 minute.
(2) Adding water in a certain amount into a stirrer in proportion, stirring for 2 minutes, adding synthetic fibers in a certain amount, and stirring for 5 minutes to obtain the water-blocking anti-cracking high-toughness bonding, reinforcing and repairing material.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114890723A (en) * | 2022-05-05 | 2022-08-12 | 陕西冀泰华合新材料科技有限责任公司 | Formula and manufacturing process of freeze-thaw resistant high-ductility concrete |
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|---|---|---|---|---|
| CN106478024A (en) * | 2016-10-12 | 2017-03-08 | 北京工业大学 | A kind of high ductility, high-adhesion cement based reinforcing and repairing material and preparation method thereof |
| CN107445545A (en) * | 2017-08-04 | 2017-12-08 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of high ductility cement-base composite material of Hydro-concrete Structures repairing |
| CN111548084A (en) * | 2020-04-13 | 2020-08-18 | 上海二十冶建设有限公司 | Jet reinforced high-ductility concrete and preparation method thereof |
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2020
- 2020-12-28 CN CN202011584372.5A patent/CN112521106A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106478024A (en) * | 2016-10-12 | 2017-03-08 | 北京工业大学 | A kind of high ductility, high-adhesion cement based reinforcing and repairing material and preparation method thereof |
| CN107445545A (en) * | 2017-08-04 | 2017-12-08 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of high ductility cement-base composite material of Hydro-concrete Structures repairing |
| CN111548084A (en) * | 2020-04-13 | 2020-08-18 | 上海二十冶建设有限公司 | Jet reinforced high-ductility concrete and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114890723A (en) * | 2022-05-05 | 2022-08-12 | 陕西冀泰华合新材料科技有限责任公司 | Formula and manufacturing process of freeze-thaw resistant high-ductility concrete |
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Application publication date: 20210319 |