CN108046678A - A kind of concrete that micro-crack selfreparing is carried out using industrial residue and preparation method thereof - Google Patents
A kind of concrete that micro-crack selfreparing is carried out using industrial residue and preparation method thereof Download PDFInfo
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- CN108046678A CN108046678A CN201810114025.2A CN201810114025A CN108046678A CN 108046678 A CN108046678 A CN 108046678A CN 201810114025 A CN201810114025 A CN 201810114025A CN 108046678 A CN108046678 A CN 108046678A
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- 239000004567 concrete Substances 0.000 title claims abstract description 57
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 239000003822 epoxy resin Substances 0.000 claims abstract description 54
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 54
- 239000000440 bentonite Substances 0.000 claims abstract description 20
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 20
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 13
- 238000002156 mixing Methods 0.000 claims description 18
- 239000004568 cement Substances 0.000 claims description 16
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 238000003756 stirring Methods 0.000 claims description 10
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 9
- 239000003995 emulsifying agent Substances 0.000 claims description 9
- 239000010440 gypsum Substances 0.000 claims description 9
- 229910052602 gypsum Inorganic materials 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 8
- 229960000583 acetic acid Drugs 0.000 claims description 6
- 239000012153 distilled water Substances 0.000 claims description 6
- 239000012362 glacial acetic acid Substances 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 238000007493 shaping process Methods 0.000 claims description 6
- 239000004575 stone Substances 0.000 claims description 5
- 150000001412 amines Chemical class 0.000 claims description 3
- 150000004985 diamines Chemical group 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 238000005245 sintering Methods 0.000 claims description 3
- 239000002689 soil Substances 0.000 claims description 3
- 235000019738 Limestone Nutrition 0.000 claims description 2
- 239000003638 chemical reducing agent Substances 0.000 claims description 2
- 238000010790 dilution Methods 0.000 claims description 2
- 239000012895 dilution Substances 0.000 claims description 2
- 150000002191 fatty alcohols Chemical class 0.000 claims description 2
- 235000013312 flour Nutrition 0.000 claims description 2
- 239000006028 limestone Substances 0.000 claims description 2
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 2
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 2
- 230000008961 swelling Effects 0.000 claims description 2
- 150000002118 epoxides Chemical class 0.000 claims 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims 1
- 229910052760 oxygen Inorganic materials 0.000 claims 1
- 239000001301 oxygen Substances 0.000 claims 1
- 229920005989 resin Polymers 0.000 claims 1
- 239000011347 resin Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 239000002994 raw material Substances 0.000 abstract description 7
- 239000004566 building material Substances 0.000 abstract description 2
- 239000002775 capsule Substances 0.000 abstract description 2
- 238000004092 self-diagnosis Methods 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 32
- 238000011084 recovery Methods 0.000 description 10
- 208000037656 Respiratory Sounds Diseases 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 5
- 235000019353 potassium silicate Nutrition 0.000 description 5
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 5
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 description 4
- 239000011707 mineral Substances 0.000 description 4
- 229910001415 sodium ion Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000006703 hydration reaction Methods 0.000 description 3
- 239000003094 microcapsule Substances 0.000 description 3
- 150000002924 oxiranes Chemical class 0.000 description 3
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 2
- 206010011376 Crepitations Diseases 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 239000010426 asphalt Substances 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910001424 calcium ion Inorganic materials 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009418 renovation Methods 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- JHXCINJSAAFBDH-UHFFFAOYSA-N [Ca].O[Si](O)(O)O Chemical compound [Ca].O[Si](O)(O)O JHXCINJSAAFBDH-UHFFFAOYSA-N 0.000 description 1
- 125000005233 alkylalcohol group Chemical group 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 235000012241 calcium silicate Nutrition 0.000 description 1
- 239000006071 cream Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant 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
- C04B2201/50—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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention belongs to self-repair concrete building material technical fields more particularly to a kind of concrete that micro-crack selfreparing is carried out using industrial residue and preparation method thereof, which is characterized in that be made of the raw material of following parts by weight：100 parts of concrete, 58 parts of mud bentonite, 36 parts of red mud, 14 parts of agstone, 38 parts of epoxy resin, 20 30 parts of water, the present invention can solve the production of existing capsule and the technical issues of being unevenly distributed the self diagnosis that can not complete micro-crack in concrete and selfreparing.
Description
Technical field
The invention belongs to self-repair concrete building material technical field more particularly to it is a kind of using industrial residue carry out it is micro-
Concrete of Crack Self and preparation method thereof.
Background technology
Existing concrete inevitably generates small cracking drawn game under the influence of long-time service and ambient enviroment
Portion is damaged, and the lighter can reduce the service life of structure, and severe one jeopardizes the safety of structure.For many years, people are to raw material, match ratio, outer
Add agent, manufacturing process, pour the fermentation such as the method for smashing and maintaining process and improved, but these do not solve concrete fundamentally
Brittle weakness.Therefore, sixty-four dollar question is become to the micro-crack of concrete and the timely and effectively reparation of damage.By ground
Macroscopic cracking caused by the other reasons such as shake, wind load, shock wave can with the naked eye find simultaneously to repair in manual methods.But
There are many fine cracks, such as matrix micro-cracks in reality, the damage in these microscopic ranges is due to the office of inspection technique
It is sex-limited it is possible that detection less than.Therefore, it is just very difficult to these undetectable crackles and damage repair.But
Be if these crackles cannot be repaired timely with damage and can influence service life of concrete and even jeopardize the safety of structure, it is present
Self-repair concrete mainly adds fibre pipe or microcapsules in concrete, these addition repair materials have great limitation
Property, it is impossible to it is applied to well in actual production, such as：The quantity of fibre pipe influences the reparation of material, cannot have been formed very little
It is complete to repair, it is excessive other macro properties of material to be had an impact again；The distribution of fibre pipe or microcapsules only uniformly divides
Cloth could preferably carry out crack forming mechanism；The comparision of production of fibre pipe and microcapsules is complicated simultaneously, the addition work in concrete
Skill is also cumbersome, it is impossible to be applied to well in actual production, it is impossible to which formation is commercially produced.
The content of the invention
The object of the present invention is to provide a kind of concrete and its preparation sides that micro-crack selfreparing is carried out using industrial residue
Method, the self diagnosis of micro-crack in concrete can not be completed and the technology of selfreparing is asked with being unevenly distributed by solving the production of existing capsule
Topic.
In order to achieve the above objectives, the technical solution adopted by the present invention is：
A kind of concrete that micro-crack selfreparing is carried out using industrial residue, is made of the raw material of following parts by weight：Concrete
100 parts, 5-8 parts of mud bentonite, 3-6 parts of red mud, 1-4 parts of agstone, 3-8 parts of epoxy resin, 20-30 parts of water.
Further, the epoxy resin is handled through Over emulsfication and dilution, and the mud swelling soil granularity is 240 mesh, in vain
Degree is not less than 75.
Further, the concrete water-cement ratio is 0.4, cement：Sand：Stone is 1：1.5：2.8, water-reducing agent is cement weight
The 1% of amount.
Further, the red mud produces the industrial residue generated in aluminium oxide for sintering process, and specific surface area is not less than
800 m2/kg。
Further, the specific surface area of the agstone is not less than 1400m2/kg。
A kind of preparation method for the concrete that micro-crack selfreparing is carried out using industrial residue, is comprised the following steps：
（1）Epoxy resin emulsifies：Select 616# epoxy resin, using fatty alcohol polyoxyethylene ether as emulsifier, emulsifier weight
It measures as the 5% of epoxy resin, emulsifier and epoxy resin is added in there-necked flask, 1h is stirred with the mixing speed of 800r/min,
The epoxy resin A that must be emulsified, then distilled water is added dropwise into the epoxy resin A emulsified, 500ml distilled water is added per 20min
Once, addition twice, obtains the epoxy resin B of oil-in-water form；
（2）Epoxy resin dilutes：Glacial acetic acid is added into epoxy resin B, the dosage of glacial acetic acid is the 15% of epoxy resin, is obtained
Diluted epoxy resin C；
（3）Red mud grinding：Red mud powder is milled to specific surface area not less than 800 m2/ kg adds in gypsum, gypsum while grinding
Weight is the 10% of red mud weight；
（4）Mixing：Epoxy resin C is placed in container, add in and the similary quality of epoxy resin C water, with electric mixer with
The mixing speed stirring 2min of 300r/min, the mud bentonite and 50 parts of concrete of 2-4 parts of addition continue with 300r/min's
Mixing speed stirs 2min, adds remaining mud bentonite and cement, continues the hand operated mixing speed stirring with 30r/min
1min adds in curing agent, and 2min, shaping are stirred with the hand operated mixing speed of 30r/min.
Further, the step（1）Middle 616# epoxy resin is transparency liquid, without apparent impurity, mechanical admixture epoxy
Equivalent：160-200g/eq；Epoxide number：0.48-0.54eq/mg；Viscosity：6-10Pa.S/25 ℃.
Further, the step（3）Middle gypsum is beta-type semi-hydrated gypsum.
Further, the step（4）Middle curing agent is diamines, and density is 0.899 g/mL at 25 DEG C, amine value
It is 3 for 480 ± 20mgkOH/g, during the weight ratio winter of epoxy resin and curing agent:1, it is 4 during summer:1.
The present invention reaction mechanism be：The present invention adds mineral in concrete mainly mud bentonite, red mud, lime
Mountain flour etc., due to bentonitic expansion, it is possible to reduce the early-age shrinkage crackle of concrete；When later concrete is cracked
When, the steam in air enters, and red mud can repair the fine cracks of below 3um；The reparation work(having except bentonite itself
Beyond energy, bentonite plays a big part to the natural package for repairing liquid, due to bentonitic expansion, can make concrete
Middle to form many gaps, reparation liquid, which enters gap, is wrapped it；Red mud, agstone, red mud are added in concrete simultaneously
Hydration reaction can be participated at hydrated cementitious initial stage with agstone, concrete early hydration intensity is improved, makes concrete structure
It is more closely knit, meanwhile, when there is micro-crack in aquation later stage concrete, the calcium ion of agstone can replace bentonite
In sodium ion, the sodium ion for being replaced out and flyash reacts, and generates waterglass, and waterglass has certain caking property, into
Entering can be with cohesive crack in crack.These mineral products can realize the reparation to crackle with renovation agent collective effect.
Present invention has the advantage that：
1st, preparation method of the invention is simple, made self-repair concrete performance efficiency, persistently, and improves impermeability
And anti-pressure ability；
2nd, present invention gained self-repair concrete is applied to concrete slight crack, can prevent its expansion, easily actively, automatically to crackle
It is repaired with damage location, recovers even to improve the intensity of concrete material to reach with extending concrete service life mesh
's；
3rd, the reinforcing bar in protection implantation concrete that can be permanently effective, ensures the stability of reinforced concrete structure, extends it
Service life, the production procedure that uses of the present invention, technical process are relatively simple, are used in mixed way with cement products, easy to operate, side
Just, industrialized production and popularization and application are conducive to；
4th, the mineral in the present invention and the compatibility of epoxy resin renovation agent and cement are good, and low alkali will not cause alkali to concrete
Aggregate reaction；
5th, industrial waste red mud, agstone etc. are used as primary raw material, it is former to lime stone can not only to slow down cement manufacture
The too fast consumption of material, and can turn waste into wealth, a variety of problem of environmental pollutions that successive elimination discarded object is brought.
Specific embodiment
Embodiment 1
A kind of concrete that micro-crack selfreparing is carried out using industrial residue, is made of the raw material of following parts by weight：Concrete
100 parts, granularity is 240 mesh, and whiteness is not less than 75 5 parts of mud bentonite, 3 parts of red mud, 1 part of agstone, through Over emulsfication and
Dilute 3 parts of the epoxy resin of processing, 20 parts of water；Wherein concrete water-cement ratio is 0.4, cement：Sand：Stone is 1：1.5：2.8, subtract
Aqua is the 1% of cement weight；Red mud produces the industrial residue generated in aluminium oxide for sintering process, and specific surface area is not less than 800
m2/kg；The specific surface area of agstone is not less than 1400m2/kg。
A kind of preparation method for the concrete that micro-crack selfreparing is carried out using industrial residue, is comprised the following steps：
（1）Epoxy resin emulsifies：616# epoxy resin is selected, 616# epoxy resin is transparency liquid, and without apparent impurity, machinery is miscellaneous
Matter epoxide equivalent：160-200g/eq；Epoxide number：0.48-0.54eq/mg；Viscosity：6-10Pa.S/25 DEG C, use poly alkyl alcohol
Ethylene oxide ether is the 5% of epoxy resin as emulsifier, emulsifier weight, and emulsifier and epoxy resin are added in there-necked flask
1h, the epoxy resin A that must be emulsified are stirred with the mixing speed of 800r/min, then is added dropwise and steams into the epoxy resin A emulsified
Distilled water, per 20min, once, addition twice, obtains the epoxy resin B of oil-in-water form to addition 500ml distilled water；
（2）Epoxy resin dilutes：Glacial acetic acid is added into epoxy resin B, the dosage of glacial acetic acid is the 15% of epoxy resin, is obtained
Diluted epoxy resin C；
（3）Red mud grinding：Red mud powder is milled to specific surface area not less than 800 m2/ kg adds in half water stone of β types while grinding
Cream, gypsum weight are the 10% of red mud weight；
（4）Mixing：Epoxy resin C is placed in container, add in and the similary weight of epoxy resin C water, with electric mixer with
The mixing speed stirring 2min of 300r/min, the mud bentonite and 50 parts of concrete of 2-4 parts of addition continue with 300r/min's
Mixing speed stirs 2min, adds remaining mud bentonite and cement, continues the hand operated mixing speed stirring with 30r/min
1min adds in curing agent, and curing agent is diamines, and density is 0.899 g/mL at 25 DEG C, and amine value is 480 ± 20mg
It is 3 during the weight ratio winter of KOH/g, epoxy resin and curing agent:1, it is 4 during summer:1, with the hand operated mixing speed of 30r/min
Stir 2min, shaping, specimen molding size 40mm*40mm*160mm.
Embodiment 2
Embodiment 2 and embodiment 1 the difference is that：A kind of concrete that micro-crack selfreparing is carried out using industrial residue,
It is made of the raw material of following parts by weight：100 parts of concrete, 8 parts of mud bentonite, 6 parts of red mud, 4 parts of agstone, asphalt mixtures modified by epoxy resin
8 parts of fat, 30 parts of water.
Embodiment 3
Embodiment 3 and embodiment 1 the difference is that：A kind of concrete that micro-crack selfreparing is carried out using industrial residue,
It is made of the raw material of following parts by weight：100 parts of concrete, 6 parts of mud bentonite, 5 parts of red mud, 3 parts of agstone, asphalt mixtures modified by epoxy resin
5 parts of fat, 24 parts of water.
Self-reparing capability judges
Each embodiment is molded 12 groups of test specimens, wherein six groups are blank test specimen, six groups of addition industrial residues and epoxy resin are repaiied
Multiple liquid, every group is two, is handled respectively through precompressed and non-precompressed, the test specimen of forming conserves 7d in fog room, during maintenance
Including water curing 3d, room temperature maintenance 4d, anti-reckon the actual amount after a discount is carried out after conserving well to test specimen and is tested, repair ability is observed, it is anti-to survey it
Intensity is rolled over, prefabricating load is the 70% of average flexural strength value, and the test specimen containing industrial residue uses same method with blank test specimen
Processing；The test specimen of non-precompressed and the intensity contrast of precompressed test specimen can draw influence of the hydrated cementitious to intensity in blank test；
For test specimen containing industrial residue after maintenance, precompressed and the comparison of non-precompressed test specimen flexural strength can draw industrial residue counterincision
The repair of line；Blank test specimen can exclude influence factor of the hydrated cementitious to intensity with experiment test specimen comparison；Wherein, table 1
For the data of shaping test piece in embodiment 1, table 2 is the data of shaping test piece in embodiment 2, and table 3 is shaping test piece in embodiment 3
Data, experimental data is as follows：
Test data shows that blank test piece intensity recovery rate is 62.5%, and the intensity recovery rate containing industrial residue is 72.9%.Examination
Test interpretation of result：Blank test specimen and test specimen containing the industrial residue intensity after maintenance have certain recovery.Blank is tried
The intensity of part is recovered mainly due to the effect of hydrated cementitious.Conserve early period（7d）, hydrated cementitious is incomplete, test specimen through handle with
Afterwards, cement continues aquation in late maintaining.Due to adding bentonite and red mud in test specimen, the bentonite in late maintaining
Hydration reaction is participated in red mud.Wherein, silica can be with Ca (OH)2Reaction generation aqueous silicic acid calcium, bentonite and Ca
(OH)2Ion exchange occurs for reaction, and calcium ion can replace the sodium ion in bentonite, and free sodium ion can be with a part two
Silica generates waterglass, and waterglass has certain caking property, and calcium silicates can fill up some micro-cracks with waterglass, to intensity
Recovery have certain effect.It is higher than blank test specimen containing the test piece intensity recovery rate for repairing liquid, intensity is recovered except cement
Outside the reaction of aquation and minerals, there is the cementation of industrial residue.
Test data shows that blank test piece intensity recovery rate is 66.4%, and the intensity recovery rate containing industrial residue is
71.7%。
Test data shows that blank test piece intensity recovery rate is 64.1%, and the intensity recovery rate containing industrial residue is 69.7%
Test result analysis：Test specimen intensity after maintenance is obtained for recovery.There is centainly test piece intensity after adding in industrial residue
Raising.Red mud improves hydrated cementitious intensity with agstone, has a positive effect to the reparation of crackle.
Claims (9)
1. a kind of concrete that micro-crack selfreparing is carried out using industrial residue, which is characterized in that by the original of following parts by weight
Material composition：100 parts of concrete, 5-8 parts of mud bentonite, 3-6 parts of red mud, 1-4 parts of agstone, 3-8 parts of epoxy resin, water
20-30 parts.
2. the concrete as described in claim 1 that micro-crack selfreparing is carried out using industrial residue, it is characterised in that：The ring
Oxygen resin uses after Over emulsfication and dilution processing as reparation liquid, and the mud swelling soil granularity is 240 mesh, and whiteness is not less than
75。
3. the concrete as claimed in claim 2 that micro-crack selfreparing is carried out using industrial residue, it is characterised in that：It is described mixed
The solidifying soil ratio of mud is 0.4, cement：Sand：Stone is 1：1.5：2.8, water-reducing agent is the 1% of cement weight.
4. the concrete as claimed in claim 3 that micro-crack selfreparing is carried out using industrial residue, it is characterised in that：It is described red
Mud produces the industrial residue generated in aluminium oxide for sintering process, and specific surface area is not less than 800 m2/kg。
5. the concrete as claimed in claim 4 that micro-crack selfreparing is carried out using industrial residue, it is characterised in that：The stone
The specific surface area of limestone flour is not less than 1400m2/kg。
6. the preparation method of the concrete that micro-crack selfreparing is carried out using industrial residue as described in claim 1-5 is any,
It is characterised in that it includes following steps：
（1）Epoxy resin emulsifies：Select 616# epoxy resin, using fatty alcohol polyoxyethylene ether as emulsifier, emulsifier weight
It measures as the 5% of epoxy resin, emulsifier and epoxy resin is added in there-necked flask, 1h is stirred with the mixing speed of 800r/min,
The epoxy resin A that must be emulsified, then distilled water is added dropwise into the epoxy resin A emulsified, 500ml distilled water is added per 20min
Once, addition twice, obtains the epoxy resin B of oil-in-water form；
（2）Epoxy resin dilutes：Glacial acetic acid is added into epoxy resin B, the dosage of glacial acetic acid is the 15% of epoxy resin, is obtained
Diluted epoxy resin C；
（3）Red mud grinding：Red mud powder is milled to specific surface area not less than 800 m2/ kg adds in gypsum, gypsum while grinding
Weight is the 10% of red mud weight；
（4）Mixing：Epoxy resin C is placed in container, add in and the similary quality of epoxy resin C water, with electric mixer with
The mixing speed stirring 2min of 300r/min, the mud bentonite and 50 parts of concrete of 2-4 parts of addition continue with 300r/min's
Mixing speed stirs 2min, adds remaining mud bentonite and cement, continues the hand operated mixing speed stirring with 30r/min
1min adds in curing agent, and 2min, shaping are stirred with the hand operated mixing speed of 30r/min.
7. the preparation method of the concrete as claimed in claim 6 that micro-crack selfreparing is carried out using industrial residue, feature
It is：The step（1）Middle 616# epoxy resin is transparency liquid, without apparent impurity, mechanical admixture epoxide equivalent：160-
200g/eq；Epoxide number：0.48-0.54eq/mg；Viscosity：6-10Pa.S/25 ℃.
8. the preparation method of the concrete as claimed in claim 6 that micro-crack selfreparing is carried out using industrial residue, feature
It is：The step（3）Middle gypsum is beta-type semi-hydrated gypsum.
9. the preparation method of the concrete as claimed in claim 6 that micro-crack selfreparing is carried out using industrial residue, feature
It is：The step（4）Middle curing agent is diamines, and density is 0.899 g/mL at 25 DEG C, amine value for 480 ±
It is 3 during the weight ratio winter of 20mgkOH/g, epoxy resin and curing agent:1, it is 4 during summer:1.
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| CN108046678B (en) | 2021-02-12 |
| CN113072330A (en) | 2021-07-06 |
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