CN108467214A - A kind of self-repairing of concrete cracks agent and preparation method thereof - Google Patents
A kind of self-repairing of concrete cracks agent and preparation method thereof Download PDFInfo
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- CN108467214A CN108467214A CN201810278656.8A CN201810278656A CN108467214A CN 108467214 A CN108467214 A CN 108467214A CN 201810278656 A CN201810278656 A CN 201810278656A CN 108467214 A CN108467214 A CN 108467214A
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- haydite
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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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
- C04B40/0046—Premixtures of ingredients characterised by their processing, e.g. sequence of mixing the ingredients when preparing the premixtures
-
- 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
- C04B20/0008—Materials specified by a shape not covered by C04B20/0016 - C04B20/0056, e.g. nanotubes
Abstract
The invention discloses a kind of self-repairing of concrete cracks agent, it is related to concrete self repairing agent technical field, the self repairing agent includes cyst wall and capsule-core, cyst wall includes the interior cyst wall that the outer cyst wall being made of polyureas and haydite are constituted, capsule-core includes outer capsule-core and interior capsule-core, and outer capsule-core is filled between interior cyst wall and outer cyst wall, capsula interna wicking is attached in haydite inner cavity, and the preparation method being combined using ultrasound and spraying, self-repairing of concrete cracks agent prepared by the present invention has the chemistry and good mechanical performance of cyst wall, capsule-core susceptibility is strong, the self-reparing capability of fracture is rapid, and haydite has porosity high, frost resistance is good, alkali resistant aggregate reaction is excellent, and it is light, intensity is good, both as the filler of concrete, again as the cyst wall of renovation agent, improve the patience of concrete, reduce the weight of concrete.
Description
Technical field
The invention belongs to building material technical fields, are related to concrete self repairing agent technical field, and in particular to one kind is mixed
Solidifying soil cracking seam self repairing agent and preparation method thereof.
Background technology
Self-repairing of concrete cracks agent is a kind of novel synthetic material, and this material is by being embedded in concrete
Portion carries out one to concrete structure loss and automatically repairs, and self repairing agent is nuzzled inside concrete in advance, works as concrete structure
When damage, self repairing agent is triggered by different trigger mechanisms (such as temperature, basicity or crack) to damage
Region is repaired, to extend the service life of concrete structure and improve its endurance quality.The research of self repairing agent at present
Direction includes：Reparation system based on cement matrix self-healing properties, based on the fundamental property of cement composition ingredient, unhydrated water
The hydration of mud；The dissolving of calcium hydroxide and subsequent carbonization, the applicable crack of such reparation system is narrow, and repairs consumption
Duration；Fibre pipe self-healing system is renovation agent to be stored in inside hollow fibre pipe first, and this fibre pipe is connection
Inside concrete and outside, when crack generates, and fibre pipe is cut off, crack is filled up in the outflow of internal renovation agent, this
Method repair it is fast, but to being limited to the vertical crack of hollow tube；Microbial mineralization self-healing system is a kind of environmentally friendly repaiies
Compound method, using urea decomposer add concrete in, the strain can by the method for mineralising tosca micro-
The region in crack is repaired to fracture, but ensures that the survival of microorganism is the difficult point of the method；Microcapsules review one's lessons by oneself complex
System, is a kind of novel self-repair material, his basic principle is similar with hollow tube self-healing system, is that repair materials are stored
Inside microcapsules, (such as crack effect) is that internal core materials are released and repaiied to play under extraneous environmental stimulus
Multiple effect successfully triggers rate with high, and size can design as needed, be a kind of currently used self-repairing of concrete cracks
Agent, as Chinese patent application publication No. CN104911833A discloses a kind of self-repair concrete for having capsule-core and cyst wall to constitute
The capsule-core of microcapsules, microcapsules is made of renovation agent, microcrystalline cellulose, surfactant and ethyl alcohol, the spy with intelligent control
Point.
Although microcapsules self-healing system have with respect to other two kinds of systems it is easy to operate, it is easy to control, and the scope of application
Wide advantage, but there are still some problems at present, is badly in need of solving, as microcapsules repair materials must be intact successful
It wraps up into inside capsule, and microcapsules need to be stored in inside concrete steadily in the long term.
Invention content
According to the above-mentioned deficiencies of the prior art, the technical problem to be solved by the present invention is to propose a kind of distress in concrete from
Renovation agent and preparation method thereof, in order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：
A kind of self-repairing of concrete cracks agent, including cyst wall and capsule-core, the cyst wall include the external capsule being made of polyureas
The interior cyst wall that wall and haydite are constituted, the capsule-core includes outer capsule-core and interior capsule-core, and outer capsule-core is filled in interior cyst wall and external capsule
Between wall, capsula interna wicking is attached in haydite inner cavity, wherein interior capsule-core is made of following parts by weight ingredient：20-30 parts of diatomite,
10-15 parts of sodium metasilicate, 5-10 parts of lithium carbonate, 10-15 parts of calcium hydroxide, 10-15 parts of gelatin solution.
Preferably, the interior capsule-core is made of following parts by weight ingredient：25 parts of diatomite, 13.5 parts of sodium metasilicate, lithium carbonate 8
Part, 12 parts of calcium hydroxide, 13.5 parts of gelatin solution.
Preferably, the haydite grain size is 3-7mm, cylindrical compress strength 1-2.5Mpa, and water absorption rate 30-45%, unit weight are for 24 hours
900-1000kg/m3。
Preferably, the outer capsule-core is made of following parts by weight ingredient：40-50 parts of sulphate aluminium cement, water-reducing agent 0.5-
1.5 parts, 1-3 parts of air entraining agent, 5-8 parts of silica flour, 5-10 parts of calcium nitrate, 1-2 parts of polyvinyl alcohol.
Preferably, the outer capsule-core is made of following parts by weight ingredient：45 parts of sulphate aluminium cement, 0.75 part of water-reducing agent,
2 parts of air entraining agent, 7 parts of silica flour, 8.5 parts of calcium nitrate, 1.5 parts of polyvinyl alcohol.
Preferably, the thickness of the outer cyst wall is 35-45 μm.
Preferably, the mass ratio of the outer cyst wall of the self repairing agent, outer capsule-core and haydite is 1:1.5-2:1-2, and capsula interna
Core accounts for the 75-85% of haydite weight.
A kind of preparation method of self-repairing of concrete cracks agent, specific preparation method are as follows：
1) haydite pre-processes：Haydite is dipped in salpeter solution, 20-30min is ultrasonically treated, deionized water is cleaned in
Property, it dries, immerses in silicone coupling agents solution, be ultrasonically treated 10-15min, drying obtains modified haydite；
2) haydite is filled：Interior capsule-core each component is placed in high speed dispersor and handles 20-25min, then by mixture with
Modified haydite mixing, is ultrasonically treated 40-45min, is sieved under vacuum conditions, dry, obtains filling haydite；
3) preparation of self repairing agent：Outer capsule-core each component is placed in high speed dispersor and handles 20-25min, is added to ten
In dialkyl benzene sulfonic acids sodium solution, mixture after mixing, is sprayed to the surface of filling haydite by heating stirring, dry, is obtained
Polyureas is used thermal spraying mode, is sprayed at batch mixing surface by batch mixing, dry, derives from renovation agent.
Preferably, the ultrasonic power is 200-300w, frequency 20-30Hz, and the rotating speed of the high speed dispersion agent is
1300-1500r/min。
Compared with prior art, beneficial effects of the present invention：
1. self repairing agent prepared by the present invention is using the structure of the double-deck cyst wall and the double-deck capsule-core, outer layer cyst wall is by polyureas structure
At polyureas has good film forming, resistance to acid and alkali, chemical stability, and the advantage that mechanical performance is high, is blended in concrete
It is less prone to rupture as the stirring of concrete pours etc., outer capsule-core is constituted using concrete admixture and sulphate aluminium cement,
When crack occurs in concrete, outer cyst wall ruptures the interior cyst wall that outer capsule-core fracture is independently repaired, while being made of haydite
Filler, which is also functioned as, with interior capsule-core constitutes haydite matter concrete, the interior capsule-core that fracture is independently repaired, and filled in haydite
Substance fracture can carry out secondary repair, improve the repair ability of self repairing agent.
2. the present invention is using haydite as interior cyst wall, haydite is high with porosity, frost resistance is good, alkali resistant aggregate reaction is excellent
Different and light, intensity is good, not only can be as the filler of concrete, but also can improve the resistance to of concrete as the cyst wall of renovation agent
Property, reduce the weight of concrete.
Specific implementation mode
It below by the description to embodiment, is described in further detail, to help those skilled in the art to this hair
Bright inventive concept, technical solution have more complete, accurate and deep understanding.
Embodiment 1
Self-repairing of concrete cracks agent in the present embodiment, including cyst wall and capsule-core, are made of polyureas successively from outside to inside
The outer cyst wall of 38-42 μm of thickness, by following parts by weight at the outer capsule-core constituted：45 parts of sulphate aluminium cement, 0.75 part of water-reducing agent,
2 parts of air entraining agent, 7 parts of silica flour, 8.5 parts of calcium nitrate, 1.5 parts of polyvinyl alcohol, by grain size be 12-13mm, cylindrical compress strength 1.5-2Mpa,
Absorb water 37-42% for 24 hours, unit weight 950-980kg/m3Haydite constitute interior cyst wall and be adsorbed in haydite inner cavity by as follows
The interior capsule-core that parts by weight ingredient is constituted：25 parts of diatomite, 13.5 parts of sodium metasilicate, 8 parts of lithium carbonate, 12 parts of calcium hydroxide, gelatin is molten
13.5 parts of liquid, and outer capsule-core is filled between interior cyst wall and outer cyst wall, the mass ratio of outer cyst wall, outer capsule-core and haydite is 1:1.6：
2, and interior capsule-core accounts for the 82.5% of haydite weight；Wherein, water-reducing agent is the Early-strength polycarboxylate superplasticizer of BASF AG's production,
Solid content is 45%, and air entraining agent is Shanghai Mace spy's MICRO-AIR202 air entraining agents, is diluted by 1% mass ratio when use, bright
The viscosity of sol solution is 30-35mps；
The preparation method of self-repairing of concrete cracks agent in the present embodiment, specific preparation method are as follows：
1) haydite pre-processes：Haydite is dipped in concentration 5mol.L-1Salpeter solution in, in power 300w, frequency 20Hz
It is ultrasonically treated 30min, deionized water cleans haydite to cleaning solution into neutrality, drying, and treated that haydite immerses is a concentration of by acid
In 0.5% silicone coupling agents solution, in power 200w, frequency is that 20Hz is ultrasonically treated 10min, and drying obtains modified haydite；
2) haydite is filled：It weighs interior capsule-core each component and is placed in high speed dispersor at rotating speed 1400r/min and handle
Then 25min mixes mixture with modified haydite, under vacuum conditions, power 300w, frequency is ultrasonically treated for 30Hz
45min, the quality for taking care of yourself the interior capsule-core of filling account for 82.5% of the haydite weight after filling, then carry out the haydite after filling
Sieving, it is dry, obtain filling haydite；
3) preparation of self repairing agent：It weighs outer capsule-core each component and is placed in high speed dispersor and handled in rotating speed 1300r/min
25min will mix finely dispersed outer capsule-core and be added in neopelex solution, it is all molten to be heated to polyvinyl alcohol
Solution, and after being uniformly mixed at rotating speed 300r/min, mixture is finally sprayed to step by the way of atomized spray
(2) surface of the haydite after filling ensures that the weight ratio of outer capsule-core and haydite is 1.6:2, it is dried in vacuo, obtains at 35 DEG C of temperature
Polyureas is finally sprayed to the surface of batch mixing by batch mixing by the way of thermal spraying, ensures that the thickness of spraying is 38-42 μm, spraying
Weight and the ratio of outer capsule-core and haydite be 1:1.6:2, feeding temperature is 300 DEG C when thermal spraying, and the pressure of feed pump is 2-
3Mpa, outlet temperature are 100 DEG C, spontaneously dry, obtain self-repairing of concrete cracks agent.
Embodiment 2
The present embodiment is with embodiment 1, the difference is that the interior capsule-core of self-repairing of concrete cracks agent includes such as in the present embodiment
Lower parts by weight ingredient：20 parts of diatomite, 15 parts of sodium metasilicate, 10 parts of lithium carbonate, 10 parts of calcium hydroxide, 10 parts of gelatin solution.
Embodiment 3
The present embodiment is with embodiment 1, the difference is that the interior capsule-core of self-repairing of concrete cracks agent includes such as in the present embodiment
Lower parts by weight ingredient：30 parts of diatomite, 10 parts of sodium metasilicate, 5 parts of lithium carbonate, 15 parts of calcium hydroxide, 15 parts of gelatin solution, outer capsule-core
Including 40 parts of following parts by weight ingredient sulphate aluminium cement, 0.5 part of water-reducing agent, 1 part of air entraining agent, 8 parts of silica flour, 10 parts of calcium nitrate,
2 parts of polyvinyl alcohol.
Embodiment 4
The present embodiment is with embodiment 3, the difference is that the outer capsule-core of self-repairing of concrete cracks agent includes such as in the present embodiment
Lower 50 parts of parts by weight ingredient sulphate aluminium cement, 1.5 parts of water-reducing agent, 3 parts of air entraining agent, 5 parts of silica flour, 5 parts of calcium nitrate, polyvinyl alcohol
2 parts.
Embodiment 5
The present embodiment is with embodiment 1, the difference is that the outer capsule-core of self-repairing of concrete cracks agent includes such as in the present embodiment
Lower 50 parts of parts by weight ingredient sulphate aluminium cement, 1.5 parts of water-reducing agent, 3 parts of air entraining agent, 5 parts of silica flour, 5 parts of calcium nitrate, polyvinyl alcohol
2 parts.
The present invention is exemplarily described above in conjunction with specific embodiment, it is clear that the present invention implements not by upper
The limitation of mode is stated, if the improvement of the various unsubstantialities of inventive concept and technical scheme of the present invention progress is used, or
It is not improved by the present invention design and technical solution directly apply to other occasions, protection scope of the present invention it
It is interior.Protection scope of the present invention should be determined by the scope of protection defined in the claims.
Claims (9)
1. a kind of self-repairing of concrete cracks agent, including cyst wall and capsule-core, which is characterized in that the cyst wall includes by polyureas structure
At outer cyst wall and haydite constitute interior cyst wall, the capsule-core includes outer capsule-core and interior capsule-core, and outer capsule-core is filled in capsula interna
Between wall and outer cyst wall, capsula interna wicking is attached in haydite inner cavity, wherein interior capsule-core is made of following parts by weight ingredient：Diatomite
20-30 parts, 10-15 parts of sodium metasilicate, 5-10 parts of lithium carbonate, 10-15 parts of calcium hydroxide, 10-15 parts of gelatin solution.
2. self-repairing of concrete cracks agent according to claim 1, which is characterized in that the interior capsule-core is by following parts by weight
At being grouped as：25 parts of diatomite, 13.5 parts of sodium metasilicate, 8 parts of lithium carbonate, 12 parts of calcium hydroxide, 13.5 parts of gelatin solution.
3. self-repairing of concrete cracks agent according to claim 1, which is characterized in that the haydite grain size is 3-7mm, cylinder
Compressive Strength 1-2.5Mpa, for 24 hours water absorption rate 30-45%, unit weight 900-1000kg/m3。
4. self-repairing of concrete cracks agent according to claim 1, which is characterized in that the outer capsule-core is by following parts by weight
At being grouped as：40-50 parts of sulphate aluminium cement, 0.5-1.5 parts of water-reducing agent, 1-3 parts of air entraining agent, 5-8 parts of silica flour, calcium nitrate 5-10
Part, 1-2 parts of polyvinyl alcohol.
5. self-repairing of concrete cracks agent according to claim 1, which is characterized in that the outer capsule-core is by following parts by weight
At being grouped as：45 parts of sulphate aluminium cement, 0.75 part of water-reducing agent, 2 parts of air entraining agent, 7 parts of silica flour, 8.5 parts of calcium nitrate, polyvinyl alcohol
1.5 part.
6. self-repairing of concrete cracks agent according to claim 1, which is characterized in that the thickness of the outer cyst wall is 35-
45μm。
7. self-repairing of concrete cracks agent according to claim 1, which is characterized in that the outer cyst wall of the self repairing agent,
The mass ratio of outer capsule-core and haydite is 1:1.5-2:1-2, and interior capsule-core accounts for the 75-85% of haydite weight.
8. a kind of preparation method of any self-repairing of concrete cracks agent of claim 1-7, which is characterized in that specific system
Preparation Method is as follows：
1) haydite pre-processes：Haydite is dipped in salpeter solution, is ultrasonically treated 20-30min, deionized water is cleaned at neutrality,
Drying is immersed in silicone coupling agents solution, and 10-15min is ultrasonically treated, and drying obtains modified haydite；
2) haydite is filled：Interior capsule-core each component is placed in high speed dispersor and handles 20-25min, then by mixture and modification
Haydite mixes, and is ultrasonically treated 40-45min under vacuum conditions, is sieved, dry, obtains filling haydite；
3) preparation of self repairing agent：Outer capsule-core each component is placed in high speed dispersor and handles 20-25min, is added to dodecane
In base benzene sulfonic acid sodium salt solution, mixture after mixing, is sprayed to the surface of filling haydite by heating stirring, dry, obtains batch mixing,
Polyureas is used into thermal spraying mode, is sprayed at batch mixing surface, it is dry, derive from renovation agent.
9. the preparation method of self-repairing of concrete cracks agent according to claim 8, which is characterized in that the ultrasonic power
Rotating speed for 200-300w, frequency 20-30Hz, the high speed dispersion agent is 1300-1500r/min.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109020308A (en) * | 2018-10-16 | 2018-12-18 | 佛山市宝粤美科技有限公司 | The production method of pervious concrete |
| CN110698108A (en) * | 2019-12-02 | 2020-01-17 | 马鞍山十七冶工程科技有限责任公司 | Concrete self-repairing capsule and preparation method and application thereof |
| CN111188407A (en) * | 2020-01-13 | 2020-05-22 | 湖南省衡洲建设有限公司 | Construction process for solving cracks caused by temperature difference of mass concrete |
| CN112645633A (en) * | 2020-12-26 | 2021-04-13 | 西盟司（上海）建筑工程材料有限公司 | Antifreezing concrete water reducing agent and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109020308A (en) * | 2018-10-16 | 2018-12-18 | 佛山市宝粤美科技有限公司 | The production method of pervious concrete |
| CN109020308B (en) * | 2018-10-16 | 2021-05-04 | 成都冶兴润达新型建材有限公司 | Production method of pervious concrete |
| CN110698108A (en) * | 2019-12-02 | 2020-01-17 | 马鞍山十七冶工程科技有限责任公司 | Concrete self-repairing capsule and preparation method and application thereof |
| CN111188407A (en) * | 2020-01-13 | 2020-05-22 | 湖南省衡洲建设有限公司 | Construction process for solving cracks caused by temperature difference of mass concrete |
| CN112645633A (en) * | 2020-12-26 | 2021-04-13 | 西盟司（上海）建筑工程材料有限公司 | Antifreezing concrete water reducing agent and preparation method thereof |
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