CN104788039A - Inner reinforcement repairing agent used for cement-based structure crack in moist environment - Google Patents
Inner reinforcement repairing agent used for cement-based structure crack in moist environment Download PDFInfo
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- CN104788039A CN104788039A CN201510114902.2A CN201510114902A CN104788039A CN 104788039 A CN104788039 A CN 104788039A CN 201510114902 A CN201510114902 A CN 201510114902A CN 104788039 A CN104788039 A CN 104788039A
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Abstract
The invention belongs to the technical field of cement mortar or concrete structure repairing, and relates to an inner reinforcement repairing agent used for cement-based structure crack in moist environment. The inner reinforcement repairing agent is a core-shell structure, the shell is a coating material, and the core is a reinforcement material prepolymer. Compared with repairing agents in the prior art, the inner reinforcement repairing agent has the advantages of small dimension, same density to a concrete material, easy dispersion in the cement-based material stirring process, and difficult upward floatation during vibration; the reinforcement material prepolymer is a latent epoxy resin adhesive, and a solidification agent is a moisture activated solidication agent ketoimine, so sufficient moist environment required by a solidification reaction is guaranteed under the comprehensive action of the crack and water-absorbent resin, and rapid solidification of the latent epoxy resin adhesive is realized; and the reinforcement material prepolymer is an epoxy resin structural adhesive, is commonly used for building structure maintaining reinforcement, can be used in a concrete structure to carry out heal bonding of the crack, is a structure inner repairing reinforcement method, and has a good reinforcing effect.
Description
Technical field
The invention belongs to sand-cement slurry or concrete structure recovery technique field, specifically, relate to a kind of for reinforcement and repair agent in cement based structural cracks under wet environment.
Background technology
The weather resistance research of the weather resistance of concrete structure, especially coastal and offshore area area concrete has become the hot issue of domestic and international project circle concern.The structure deteriorate that ocean environment causes concrete corrosion, particularly steel bar corrosion is quite serious.And what provide rapid passage for everything is exactly distress in concrete.Concrete structure is once produce crack, the various corrosive mediums such as aqueous vapor, carbonic acid gas, chlorion just enter inside concrete along the duct of cracking initiation, progressively move on to rebar surface, destroy the alkaline environment needed for reinforcing bar, start the corrosion that reinforcing bar occurs, until jeopardize the safety of total.Therefore; for effectively alleviating the steel bar corrosion in these regions; usually in the following ways: the type selecting of concrete structure, the chloride ion content reduced in concrete material, raising concrete density, increase thickness of protection tier etc.; this a series of sfgd. is preventive measures; slow down the time that crack occurs; and once after the generation of crack; the effect that these measures can play just is subject to great restriction; therefore how to find a kind of after crack occurs, the measure that effectively can slow down steel bar corrosion is the most important thing.
The self-repair method of sand-cement slurry or concrete structure crack has become international study hotspot at present, based on the self-healing phenomenon of field of biology, the investigator of engineering circles proposes a kind of new concept about cement based structure repair---self-healing technology, carry out at present and studied widely, mainly contain as follows: 1) bio-based renovation agent, microbial mineralization effect is utilized to make cement-based material crack produce selfreparing effect, but whether this kind of bioremediation agents is applicable to salt environment that is coastal or offshore area, and result is unknown; 2) pitch class renovation agent, snow melt in winter adopts deicer salts to cause larger infringement to existing road surface, and therefore, such pitch renovation agent also can not be used among the salt environment of high density; 3) more pre-buried Capsuleses, Glass tubing, glass fibre or the metal species object for memory function in cement based structure, still there is problem miscellaneous in these built-in fittings, pre-buried Glass tubing is under concrete strengthening stirs, easy fragmentation, lose its repair, the alloy of memory function is more weak with concrete cementability in cement based structure.
Summary of the invention
For solving the problems of the technologies described above, the invention provides that a kind of erosion resistance is strong, viscosifying power is good for reinforcement and repair agent in cement based structural cracks under wet environment.
Of the present invention a kind of for reinforcement and repair agent in cement based structural cracks under wet environment, described interior reinforcement and repair agent is nucleocapsid structure, and shell is lapping, and kernel is reinforcement material performed polymer.
Of the present invention a kind of for reinforcement and repair agent in cement based structural cracks under wet environment, described lapping is biological species or starch based material.
Of the present invention a kind of for reinforcement and repair agent in cement based structural cracks under wet environment, described biological species material is alginate calcium.
Of the present invention a kind of for reinforcement and repair agent in cement based structural cracks under wet environment, described reinforcement material performed polymer is incubated epoxide sizing agent.
Of the present invention a kind of for reinforcement and repair agent in cement based structural cracks under wet environment, described incubated epoxide sizing agent, by mass parts, comprises the liquid bisphenol F type epoxy resin of 100 parts, the strange cross-linking type Natvosol graft acrylamide of scholar's toughner QS-BE, 5-10 part of 8-15 part, the ketoimine of coupling agent KH-560,30-40 part of 2 parts, the calcium sulfate crystal whiskers of 10-20 part, the 400 order ball-type silicon powders of 120 parts.
Of the present invention a kind of for reinforcement and repair agent in cement based structural cracks under wet environment, the shape of described nucleocapsid structure is cylindric, and length is 8-10mm, and diameter is 5mm.
Of the present invention a kind of for reinforcement and repair agent in cement based structural cracks under wet environment, described renovation agent is exclusively used under wet environment in concrete structure, and its consumption is the 20-35% of sand-cement slurry quality.
The mechanism of action: interior reinforcement and repair agent of the present invention is dispersed in concrete structure, when Concrete Structure Crack, the stress concentration effect of crack place causes Shell Materials in renovation agent to break, and inner incubated epoxide sizing agent oozes out gradually; Under the effect of absorbent resin-cross-linking type Natvosol graft acrylamide, the humidity at crack place increases, effective curing reaction that must excite latent curing agent ketoimine, fill this crack, place, and implement effective adhesive, block the infiltration passage of corrosive medium (water, air, salts substances), realize the filling of distress in concrete and interior reinforcing.
Compared with prior art, of the present inventionly to have the following advantages for reinforcement and repair agent in cement based structural cracks under wet environment: 1) dispersing technology is simple, described interior reinforcement and repair agent size is little, density is suitable with concrete material, easily disperses and not easily float when vibrating in cement-based material mix process; 2) curing speed is fast, in described interior reinforcement and repair agent, reinforcement material performed polymer is latent epoxy resin adhesive, solidifying agent is moisture activation solidifying agent-one imines, under the comprehensive action of crack and absorbent resin, ensure that the sufficient wet environment needed for curing reaction, the fast setting of latent epoxy resin adhesive can be realized; 3) interior consolidation effect is good, and in described interior reinforcement and repair agent, reinforcement material performed polymer is epoxy resin structural adhesive, is usually used in building structure maintenance and reinforcement, use it for concrete structure inside, fracture carries out heals adhesion, and be repairing and reinforcing method in kind of structure, consolidation effect is good.
Accompanying drawing explanation
Fig. 1: interior reinforcement and repair agent distribution schematic diagram in cement matrix structure; Fig. 2: under External Force Acting, crack rear colloid occurs and oozes out schematic diagram gradually; Fig. 3: solidification healing crack schematic diagram occurs colloid in moisture activation effect lower casing.
Embodiment
Be described further for reinforcement and repair agent in cement based structural cracks under wet environment of the present invention below in conjunction with specific embodiment, but protection scope of the present invention is not limited to this.
Embodiment 1
For a reinforcement and repair agent in cement based structural cracks under wet environment, described interior reinforcement and repair agent is nucleocapsid structure, and shell is lapping, and kernel is reinforcement material performed polymer; Described lapping is biological species; Described biological species material is alginate calcium; Described reinforcement material performed polymer is incubated epoxide sizing agent; Described incubated epoxide sizing agent is by mass parts, comprise the liquid bisphenol F type epoxy resin of 100 parts, 8 parts strange scholar's toughner QS-BE, 5 parts cross-linking type Natvosol graft acrylamide, 2 parts coupling agent KH-560,30 parts ketoimine (two-N, N '-(methyl-butvl methylene radical)-diethylenetriamine), the calcium sulfate crystal whiskers of 10 parts, the 400 order ball-type silicon powders of 120 parts; The shape of described nucleocapsid structure is cylindric, and length is 8mm, and diameter is 5mm; Described renovation agent is exclusively used under wet environment in concrete structure, and its consumption is 20% of sand-cement slurry quality.
Embodiment 2
For a reinforcement and repair agent in cement based structural cracks under wet environment, described interior reinforcement and repair agent is nucleocapsid structure, and shell is lapping, and kernel is reinforcement material performed polymer; Described lapping is starch based material; Described reinforcement material performed polymer is incubated epoxide sizing agent; Described incubated epoxide sizing agent, by mass parts, comprises the liquid bisphenol F type epoxy resin of 100 parts, strange scholar's toughner QS-BE of 12 parts, the cross-linking type Natvosol graft acrylamide of 7 parts, the coupling agent KH-560 of 2 parts, the ketoimine (Kingcure 225K) of 35 parts, the calcium sulfate crystal whiskers of 15 parts, the 400 order ball-type silicon powders of 120 parts; The shape of described nucleocapsid structure is cylindric, and length is 9mm, and diameter is 5mm; Described renovation agent is exclusively used under wet environment in concrete structure, and its consumption is 25% of sand-cement slurry quality.
Embodiment 3
For a reinforcement and repair agent in cement based structural cracks under wet environment, described interior reinforcement and repair agent is nucleocapsid structure, and shell is lapping, and kernel is reinforcement material performed polymer; Described lapping is starch based material; Described reinforcement material performed polymer is incubated epoxide sizing agent; Described incubated epoxide sizing agent, by mass parts, comprises the liquid bisphenol F type epoxy resin of 100 parts, strange scholar's toughner QS-BE of 15 parts, the cross-linking type Natvosol graft acrylamide of 10 parts, the coupling agent KH-560 of 2 parts, the ketoimine (APMD) of 40 parts, the calcium sulfate crystal whiskers of 20 parts, the 400 order ball-type silicon powders of 120 parts; The shape of described nucleocapsid structure is cylindric, and length is 10mm, and diameter is 5mm; Described renovation agent is exclusively used under wet environment in concrete structure, and its consumption is 35% of sand-cement slurry quality.
Embodiment 4
For a reinforcement and repair agent in cement based structural cracks under wet environment, described interior reinforcement and repair agent is nucleocapsid structure, and shell is lapping, and kernel is reinforcement material performed polymer; Described lapping is biological species; Described biological species material is alginate calcium; Described reinforcement material performed polymer is incubated epoxide sizing agent; Described incubated epoxide sizing agent is by mass parts, comprise the liquid bisphenol F type epoxy resin of 100 parts, 8 parts strange scholar's toughner QS-BE, 5 parts cross-linking type Natvosol graft acrylamide, 2 parts coupling agent KH-560,30 parts ketoimine (two-N, N '-(methyl-butvl methylene radical)-diethylenetriamine), the 5-hydroxyl-2-benzamide-methyl benzoate (being separated from unprocessed Radix Aconiti Lateralis) of 1 part, the calcium sulfate crystal whiskers of 10 parts, the 400 order ball-type silicon powders of 120 parts; The shape of described nucleocapsid structure is cylindric, and length is 8mm, and diameter is 5mm; Described renovation agent is exclusively used under wet environment in concrete structure, and its consumption is 20% of sand-cement slurry quality.
Reinforcement and repair agent in embodiment 1-3 gained is stirred, the test of mechanical property is carried out according to the testing method adopted required in national standard " Reinforcement of Engineering Structure materials application security authentication specification " (GB50728-2011), test result is in table 1, and wherein project demand is that distress in concrete reparation glue security authentication standard should meet in specification the regulation showing 4.6.4.
Table 1: reinforcement and repair agent security test result in embodiment 1-3 gained
Compared with prior art, of the present inventionly to have the following advantages for reinforcement and repair agent in cement based structural cracks under wet environment: 1) dispersing technology is simple, described interior reinforcement and repair agent size is little, density is suitable with concrete material, easily disperses and not easily float when vibrating in cement-based material mix process; 2) curing speed is fast, in described interior reinforcement and repair agent, reinforcement material performed polymer is latent epoxy resin adhesive, solidifying agent is moisture activation solidifying agent-one imines, under the comprehensive action of crack and absorbent resin, ensure that the sufficient wet environment needed for curing reaction, the fast setting of latent epoxy resin adhesive can be realized; 3) interior consolidation effect is good, and in described interior reinforcement and repair agent, reinforcement material performed polymer is epoxy resin structural adhesive, is usually used in building structure maintenance and reinforcement, use it for concrete structure inside, fracture carries out heals adhesion, and be repairing and reinforcing method in kind of structure, consolidation effect is good.
Claims (7)
1. for a reinforcement and repair agent in cement based structural cracks under wet environment, it is characterized in that, described interior reinforcement and repair agent is nucleocapsid structure, and shell is lapping, and kernel is reinforcement material performed polymer.
2. according to claim 1ly it is characterized in that for reinforcement and repair agent in cement based structural cracks under wet environment, described lapping is biological species or starch based material.
3. according to claim 2ly it is characterized in that for reinforcement and repair agent in cement based structural cracks under wet environment, described biological species material is alginate calcium.
4. according to claim 1ly it is characterized in that for reinforcement and repair agent in cement based structural cracks under wet environment, described reinforcement material performed polymer is incubated epoxide sizing agent.
5. according to claim 4 for reinforcement and repair agent in cement based structural cracks under wet environment, it is characterized in that, described incubated epoxide sizing agent, by mass parts, comprises the liquid bisphenol F type epoxy resin of 100 parts, the strange cross-linking type Natvosol graft acrylamide of scholar's toughner QS-BE, 5-10 part of 8-15 part, the ketoimine of coupling agent KH-560,30-40 part of 2 parts, the calcium sulfate crystal whiskers of 10-20 part, the 400 order ball-type silicon powders of 120 parts.
6. according to claim 1ly it is characterized in that for reinforcement and repair agent in cement based structural cracks under wet environment, the shape of described nucleocapsid structure is cylindric, and length is 8-10mm, and diameter is 5mm.
7. according to claim 1ly it is characterized in that for reinforcement and repair agent in cement based structural cracks under wet environment, described renovation agent is exclusively used under wet environment in concrete structure, and its consumption is the 20-35% of sand-cement slurry quality.
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Cited By (7)
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| CN105839832A (en) * | 2016-03-23 | 2016-08-10 | 武汉大学 | Self-sensing self-healing concrete member |
| CN107129182A (en) * | 2017-05-18 | 2017-09-05 | 济南大学 | A kind of modified gel powder and its production method and application |
| CN108409178A (en) * | 2018-03-12 | 2018-08-17 | 北京工业大学 | A kind of swelling type microcapsules/cement base self-healing system |
| CN110316995A (en) * | 2019-04-25 | 2019-10-11 | 武汉理工大学 | A kind of preparation method and application of the polyacrylamide microgel particle for cement-based material selfreparing |
| CN113213806A (en) * | 2021-05-21 | 2021-08-06 | 武汉理工大学 | Delayed permeation type core-shell structure chloride ion curing agent and preparation method thereof |
| CN113582576A (en) * | 2021-07-14 | 2021-11-02 | 北京荣露材料科技有限公司 | Microcapsule for improving bonding strength of dry-mixed mortar and preparation method thereof |
| CN113773009A (en) * | 2021-11-15 | 2021-12-10 | 交通运输部天津水运工程科学研究所 | Repair material and repair method for improving toughness of port high-pile wharf structure |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105839832A (en) * | 2016-03-23 | 2016-08-10 | 武汉大学 | Self-sensing self-healing concrete member |
| CN107129182A (en) * | 2017-05-18 | 2017-09-05 | 济南大学 | A kind of modified gel powder and its production method and application |
| CN107129182B (en) * | 2017-05-18 | 2019-03-15 | 济南大学 | A kind of modified gel powder and its production method and application |
| CN108409178A (en) * | 2018-03-12 | 2018-08-17 | 北京工业大学 | A kind of swelling type microcapsules/cement base self-healing system |
| CN110316995A (en) * | 2019-04-25 | 2019-10-11 | 武汉理工大学 | A kind of preparation method and application of the polyacrylamide microgel particle for cement-based material selfreparing |
| CN110316995B (en) * | 2019-04-25 | 2021-09-07 | 武汉理工大学 | Preparation method and application of polyacrylamide gel particles for cement-based material self-repair |
| CN113213806A (en) * | 2021-05-21 | 2021-08-06 | 武汉理工大学 | Delayed permeation type core-shell structure chloride ion curing agent and preparation method thereof |
| CN113582576A (en) * | 2021-07-14 | 2021-11-02 | 北京荣露材料科技有限公司 | Microcapsule for improving bonding strength of dry-mixed mortar and preparation method thereof |
| CN113582576B (en) * | 2021-07-14 | 2023-09-05 | 北京荣露材料科技有限公司 | Microcapsule for improving bonding strength of dry powder mortar and preparation method thereof |
| CN113773009A (en) * | 2021-11-15 | 2021-12-10 | 交通运输部天津水运工程科学研究所 | Repair material and repair method for improving toughness of port high-pile wharf structure |
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| CN104788039B (en) | 2016-08-24 |
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