CN104788039B - A kind of interior reinforcement and repair agent of cement based structural cracks under wet environment - Google Patents
A kind of interior reinforcement and repair agent of cement based structural cracks under wet environment Download PDFInfo
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- CN104788039B CN104788039B CN201510114902.2A CN201510114902A CN104788039B CN 104788039 B CN104788039 B CN 104788039B CN 201510114902 A CN201510114902 A CN 201510114902A CN 104788039 B CN104788039 B CN 104788039B
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Abstract
The invention belongs to cement mortar or xoncrete structure recovery technique field, relate to a kind of interior reinforcement and repair agent of 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.Compared with prior art, the invention have the advantages that size is little, density is suitable with concrete material, is difficult to float when easily disperseing and vibrate during cement-based material mix；Reinforcement material performed polymer is latency epoxy resin adhesive, firming agent is dampness activation firming agent ketimide, under the comprehensive function of crack and water-absorbing resins, it is ensured that the sufficient wet environment needed for curing reaction, the fast setting of latency epoxy resin adhesive can be realized；Reinforcement material performed polymer is epoxy resin structural adhesive, is usually used in building structure maintenance and reinforcement, uses it for inside xoncrete structure, and fracture carries out healing bonding, is repairing and reinforcing method in kind of structure, and consolidation effect is good.
Description
Technical field
The invention belongs to cement mortar or xoncrete structure recovery technique field, it particularly relates to use to one
The interior reinforcement and repair agent of cement based structural cracks under wet environment.
Background technology
The durability of xoncrete structure, the most coastal and offshore area concrete durability research has become state
The hot issue that inside and outside engineering circles is paid close attention to.The marine environment corrosion to concrete, particularly steel bar corrosion is caused
Structural deterioration the most serious.And be everything provide express passway be exactly distress in concrete.Concrete is tied
Structure once produces crack, and the various corrosive mediums such as aqueous vapor, carbon dioxide, chloride ion are just along cracking initiation
Duct enters inside concrete, progressively moves on to rebar surface, destroys the alkaline environment needed for reinforcing bar, starts to occur
The corrosion of reinforcing bar, until jeopardizing the safety of total.Therefore, for effectively alleviating the steel in these regions
Muscle corrosion, the most in the following ways: the chloride ion in the type selecting of xoncrete structure, reduction concrete material contains
Amount, raising concrete density, increase thickness of protection tier etc., this series of protective measure is pre-
Anti-measure, slows down the time that crack occurs, and after once crack produces, the effect that these measures can play is just
It is extremely limited, the most how to find a kind of after crack occurs, can effectively slow down the measure of steel bar corrosion
It it is the most important thing.
The self-repair method of cement mortar or concrete structure crack has become international study hotspot the most, base
In the self-healing phenomenon of field of biology, the researcher of engineering circles proposes a kind of new about cement based structure repair
Theory self-healing technology, has the most carried out and has studied widely, mainly has as follows: 1) bio-based renovation agent,
Utilize microbial mineralization effect to make cement-based material crack be produced from repairing effect, but this kind of bioremediation agents is
No being applicable to the coastal or salt environment of offshore area, result is unknown；2) Colophonium class renovation agent, snow melt in winter
Using deicer salts that existing road surface has been caused bigger infringement, therefore, such Colophonium renovation agent also cannot be used for height
Among the salt environment of concentration；3) in cement based structure more pre-buried Capsuleses, glass tubing, glass fibre or
Person is the metal substances part for memory function, and these built-in fittings still exist problem miscellaneous, pre-buried
Glass tubing, under concrete strengthening stirs, is easily broken, loses its repair, and the alloy of memory function is at water
In mud based structures, the cementability with concrete is more weak.
Summary of the invention
For solving above-mentioned technical problem, the invention provides that a kind of corrosion resistance is strong, cementitiousness is good for tide
The interior reinforcement and repair agent of cement based structural cracks under wet environment.
A kind of interior reinforcement and repair agent of cement based structural cracks under wet environment of the present invention, described interior
Reinforcement and repair agent is nucleocapsid structure, and shell is lapping, and kernel is reinforcement material performed polymer.
A kind of interior reinforcement and repair agent of cement based structural cracks, described bag under wet environment of the present invention
Wrapping up in material is biological species or starch based material.
A kind of interior reinforcement and repair agent of cement based structural cracks, described life under wet environment of the present invention
Composition material is calcium alginate.
A kind of interior reinforcement and repair agent of cement based structural cracks under wet environment of the present invention, described in add
Gu material performed polymer is incubated epoxide adhesive.
A kind of interior reinforcement and repair agent of cement based structural cracks under wet environment of the present invention, described latent
Volt type epoxy resin adhesive in parts by mass, including liquid bisphenol F type epoxy resin, 8-15 part of 100 parts
The cross-linking type hydroxyethyl cellulose graft acrylamide of strange scholar's toughener QS-BE, 5-10 part, the coupling of 2 parts
The ketimide of agent KH-560,30-40 part, the calcium sulfate crystal whiskers of 10-20 part, the 400 mesh ball-type silicon of 120 parts are micro-
Powder.
A kind of interior reinforcement and repair agent of cement based structural cracks, described core under wet environment of the present invention
Being shaped as of shell structure is cylindric, a length of 8-10mm, a diameter of 5mm.
A kind of interior reinforcement and repair agent of cement based structural cracks under wet environment of the present invention, described in repair
Multiple agent is exclusively used under wet environment in xoncrete structure, and its consumption is the 20-35% of cement mortar quality.
The mechanism of action: interior reinforcement and repair agent of the present invention is dispersed in xoncrete structure, when concrete is tied
When structure produces crack, at crack, the effect of stress concentration causes Shell Materials in renovation agent to rupture, and internal is latent
Volt type epoxy resin adhesive gradually oozes out；At water-absorbing resins-cross-linking type hydroxyethyl cellulose graft acrylamide
Effect under, humidity at crack increases, and effective curing reaction that must excite latent curing agent ketimide is filled out
Fill crack at this, and be implemented with effective adhesive, block the infiltration of corrosive medium (water, air, salts substances)
Passage, it is achieved the filling of distress in concrete and interior reinforcing.
Compared with prior art, of the present invention under wet environment the interior reinforcing of cement based structural cracks repair
Multiple agent has the advantage that 1) dispersing technology is simple, and described interior reinforcement and repair agent size is little, density and concrete
Material is suitable, is difficult to float when easily disperseing and vibrate during cement-based material mix；2) curing rate is fast,
In described interior reinforcement and repair agent, reinforcement material performed polymer is latency epoxy resin adhesive, and firming agent is that dampness causes
Firming agent-one imines alive, under the comprehensive function of crack and water-absorbing resins, it is ensured that filling needed for curing reaction
Foot wet environment, can realize the fast setting of latency epoxy resin adhesive；3) interior consolidation effect is good, described
In interior reinforcement and repair agent, reinforcement material performed polymer is epoxy resin structural adhesive, is usually used in building structure maintenance and reinforcement,
Using it for inside xoncrete structure, fracture carries out healing bonding, is repairing and reinforcing method in kind of structure, adds
Gu it is effective.
Accompanying drawing explanation
Fig. 1: interior reinforcement and repair agent distribution schematic diagram in cement matrix structure；Fig. 2: under External Force Acting, crack is sent out
After life, colloid gradually oozes out schematic diagram；Fig. 3: colloid occurs solidification healing crack to show in dampness activation effect lower casing
It is intended to.
Detailed description of the invention
Below in conjunction with specific embodiment to of the present invention under wet environment in cement based structural cracks
Reinforcement and repair agent is described further, but protection scope of the present invention is not limited to this.
Embodiment 1
A kind of interior reinforcement and repair agent of cement based structural cracks under wet environment, described interior reinforcement and repair agent is
Nucleocapsid structure, shell is lapping, and kernel is reinforcement material performed polymer；Described lapping is biological species；
Described biological species material is calcium alginate；Described reinforcement material performed polymer is incubated epoxide adhesive；Institute
State incubated epoxide adhesive in parts by mass, including the liquid bisphenol F type epoxy resin of 100 parts, 8
The strange scholar toughener QS-BE of part, the cross-linking type hydroxyethyl cellulose graft acrylamide of 5 parts, the coupling agent of 2 parts
KH-560, the ketimide (double-N, N '-(methyl-butvl methylene)-diethylenetriamine) of 30 parts, the sulphuric acid of 10 parts
Calcium pyroborate, the 400 mesh ball-type silicon powders of 120 parts；Being shaped as of described nucleocapsid structure is cylindric, a length of 8mm,
A diameter of 5mm；Described renovation agent is exclusively used under wet environment in xoncrete structure, and its consumption is cement mortar matter
The 20% of amount.
Embodiment 2
A kind of interior reinforcement and repair agent of cement based structural cracks under wet environment, described interior reinforcement and repair agent is
Nucleocapsid structure, shell is lapping, and kernel is reinforcement material performed polymer；Described lapping is starch based material
Material；Described reinforcement material performed polymer is incubated epoxide adhesive；Described incubated epoxide adhesive
In parts by mass, including the liquid bisphenol F type epoxy resin of 100 parts, the strange scholar toughener QS-BE of 12 parts,
The cross-linking type hydroxyethyl cellulose graft acrylamide of 7 parts, the coupling agent KH-560 of 2 parts, the ketimide of 35 parts
(Kingcure 225K), the calcium sulfate crystal whiskers of 15 parts, the 400 mesh ball-type silicon powders of 120 parts；Described nucleocapsid is tied
Being shaped as of structure is cylindric, a length of 9mm, a diameter of 5mm；Described renovation agent is exclusively used under wet environment mixed
In Xtah Crude Clay structure, its consumption is the 25% of cement mortar quality.
Embodiment 3
A kind of interior reinforcement and repair agent of cement based structural cracks under wet environment, described interior reinforcement and repair agent is
Nucleocapsid structure, shell is lapping, and kernel is reinforcement material performed polymer；Described lapping is starch based material
Material；Described reinforcement material performed polymer is incubated epoxide adhesive；Described incubated epoxide adhesive
In parts by mass, including the liquid bisphenol F type epoxy resin of 100 parts, the strange scholar toughener QS-BE of 15 parts,
The cross-linking type hydroxyethyl cellulose graft acrylamide of 10 parts, the coupling agent KH-560 of 2 parts, the ketimide of 40 parts
(APMD), 20 parts calcium sulfate crystal whiskers, the 400 mesh ball-type silicon powders of 120 parts；The shape of described nucleocapsid structure
Shape is cylindric, a length of 10mm, a diameter of 5mm；Described renovation agent is exclusively used in concrete under wet environment
In structure, its consumption is the 35% of cement mortar quality.
Embodiment 4
A kind of interior reinforcement and repair agent of cement based structural cracks under wet environment, described interior reinforcement and repair agent is
Nucleocapsid structure, shell is lapping, and kernel is reinforcement material performed polymer；Described lapping is biological species；
Described biological species material is calcium alginate；Described reinforcement material performed polymer is incubated epoxide adhesive；Institute
State incubated epoxide adhesive in parts by mass, including the liquid bisphenol F type epoxy resin of 100 parts, 8 parts
Strange scholar toughener QS-BE, the cross-linking type hydroxyethyl cellulose graft acrylamide of 5 parts, the coupling agent of 2 parts
KH-560, the ketimide (double-N, N '-(methyl-butvl methylene)-diethylenetriamine) of 30 parts, the 5-hydroxyl of 1 part
-2-benzamide-essence of Niobe (being isolatable from Radix Aconiti Lateralis), the calcium sulfate crystal whiskers of 10 parts, 400 mesh of 120 parts
Ball-type silicon powder；Being shaped as of described nucleocapsid structure is cylindric, a length of 8mm, a diameter of 5mm；Described repair
Multiple agent is exclusively used under wet environment in xoncrete structure, and its consumption is the 20% of cement mortar quality.
Reinforcement and repair agent in embodiment 1-3 gained is stirred, according to national standard " Reinforcement of Engineering Structure material
Application security measurement specification " the required method of testing used carries out mechanical property in (GB50728-2011)
Test, test result is shown in Table 1, and wherein project demand is that distress in concrete reparation glue security authentication standard should meet
The regulation of table 4.6.4 in specification.
Table 1: reinforcement and repair agent security test result in embodiment 1-3 gained
Compared with prior art, of the present invention under wet environment the interior reinforcing of cement based structural cracks repair
Multiple agent has the advantage that 1) dispersing technology is simple, and described interior reinforcement and repair agent size is little, density and concrete
Material is suitable, is difficult to float when easily disperseing and vibrate during cement-based material mix；2) curing rate is fast,
In described interior reinforcement and repair agent, reinforcement material performed polymer is latency epoxy resin adhesive, and firming agent is that dampness causes
Firming agent-one imines alive, under the comprehensive function of crack and water-absorbing resins, it is ensured that filling needed for curing reaction
Foot wet environment, can realize the fast setting of latency epoxy resin adhesive；3) interior consolidation effect is good, described
In interior reinforcement and repair agent, reinforcement material performed polymer is epoxy resin structural adhesive, is usually used in building structure maintenance and reinforcement,
Using it for inside xoncrete structure, fracture carries out healing bonding, is repairing and reinforcing method in kind of structure, adds
Gu it is effective.
Claims (4)
1. the interior reinforcement and repair agent of cement based structural cracks under wet environment, it is characterised in that 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 or starch based material；Described reinforcement material performed polymer is incubated epoxide adhesive；
Described incubated epoxide adhesive in parts by mass, including the liquid bisphenol F type epoxy resin of 100 parts, the cross-linking type hydroxyethyl cellulose graft acrylamide of strange scholar's toughener QS-BE, 5-10 part of 8-15 part, the ketimide of coupling agent KH-560,30-40 part of 2 parts, the calcium sulfate crystal whiskers of 10-20 part, the 400 mesh ball-type silicon powders of 120 parts.
The interior reinforcement and repair agent of cement based structural cracks under wet environment the most according to claim 1, it is characterised in that described biological species material is calcium alginate.
The interior reinforcement and repair agent of cement based structural cracks under wet environment the most according to claim 1, it is characterised in that being shaped as of described nucleocapsid structure is cylindric, a length of 8-10mm, a diameter of 5mm.
The interior reinforcement and repair agent of cement based structural cracks under wet environment the most according to claim 1, it is characterised in that described renovation agent is exclusively used under wet environment in xoncrete structure, and its consumption is the 20-35% of cement mortar quality.
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| CN105839832B (en) * | 2016-03-23 | 2017-11-28 | 武汉大学 | It is a kind of to perceive self union concrete component certainly |
| 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 |
| 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 |
| 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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| DE102007007336A1 (en) * | 2007-02-14 | 2008-08-21 | Wacker Chemie Ag | Redispersible core-shell polymers and a process for their preparation |
| CN101289298B (en) * | 2008-05-20 | 2012-06-06 | 深圳大学 | Self-repair concrete using urea-formaldehyde resin type high molecule microcapsule and method of manufacture |
| CN102358686A (en) * | 2011-07-06 | 2012-02-22 | 江苏金陵特种涂料有限公司 | Aqueous epoxy cement mortar |
| CN103979824B (en) * | 2014-04-28 | 2016-08-24 | 同济大学 | Situ aggregation method preparation is for the microcapsule preparation method of cement-based material selfreparing |
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