CN108164214A - A kind of C70 High-performance graphite oxide alkene concrete for mixing microballon flyash and preparation method thereof - Google Patents
A kind of C70 High-performance graphite oxide alkene concrete for mixing microballon flyash and preparation method thereof Download PDFInfo
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- CN108164214A CN108164214A CN201711390362.6A CN201711390362A CN108164214A CN 108164214 A CN108164214 A CN 108164214A CN 201711390362 A CN201711390362 A CN 201711390362A CN 108164214 A CN108164214 A CN 108164214A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/245—Curing concrete articles
-
- 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
- C04B2111/00017—Aspects relating to the protection of the environment
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The invention discloses a kind of C70 High-performance graphite oxide alkene concrete for mixing microballon flyash and preparation method thereof, and the graphene oxide mortar includes the raw material of following mass fractions：391.85 parts of cement, 166 parts of water, 570 parts of natural river sand, 1205 parts of rubble, microballon flyash 69.15,9.22 parts of high-efficiency water-reducing agent of poly-carboxylic acid, 17.288 parts of graphene oxide solution raw material；The proportioning of the preparation method of the graphene oxide mortar including raw material, is poured, is molded and conserved the mixing of raw material, and preparation method is simple to operation.The C70 high performance concrete slumps prepared according to the present invention meet engine request, and Anti-Chloride Ion Penetration is excellent.The C70 High-performance graphite oxide alkene concrete prices of fly ash prepared by the present invention are the halfs that other technologies prepare similar product price；Compared with the design of other C70 high performance concretes and preparation, 18% is reduced by the C70 High-performance graphite oxide alkene concrete cements dosage of same performance prepared by the present invention.Meanwhile the reduction of cement consumption, favorable environment protection.
Description
Technical field
The invention belongs to building material technical fields, more particularly to preparation method of concrete technical field.
Background technology
Concrete is widely used in the field of civil engineering such as industry and civil buildings, bridge, harbour.It is reported that from
The whole world produces 3,600,000,000 cement every year since 2011, wherein more than 55 percent comes from China.Concrete has compared with highly resistance
Compressive Strength, but high brittleness, tensile strength are low, ductility and toughness are poor, anti-permeability performance easy to crack and low, in mechanical load and ring
Under the collective effect of the factors such as border load, endurance quality reduces, structure premature degradation or failure.It is meanwhile green and sustainable
Development is the certainty in epoch, largely using concrete, needs to produce a large amount of cement, seriously affects environment.
Countries in the world scientist has carried out extensive research, seeks to solve the problems, such as these method and approach.It is main at present
Technology is：
(1) the problem of reduction ratio of mud, this method, is smaller for the ratio of mud, and intensity is higher, but without improving water
Mud hydration capability can not fundamentally improve gel microstructure, thus to improving the intensity of concrete and the effect of durability
It is limited.Meanwhile ratio of mud reduction means that cement consumption increases, price accordingly increases, and mass production cement can generate more
Multi-environment pollution；
(2) the problem of addition fiber (such as carbon fiber, steel fibre, glass fibre), this method is primarily present is the technology
Only from the crack growth for macroscopically preventing concrete, but without raising hydrated cementitious ability, it can not fundamentally improve gel
Microstructure, thus to improve concrete intensity and durability effect it is limited；
(3) the problem of addition carbon nanotube, this method is primarily present is to make gel more closely knit by filling, is not improved
Hydrated cementitious ability can not fundamentally improve gel microstructure, thus the effect to improving concrete strength and durability
It is limited.And price is high, is unfavorable for promoting and applying.
Graphene oxide is product of the graphene after oxidation processes, it inherits many excellent performances of graphene,
Such as high-tensile, bigger serface, better hydrophily and cheap price, and it is non-conductive so that graphene oxide
Be more suitable for than other nano materials it is compound with concrete, graphene oxide surface wrinkly and gel produce machinery from
Strong collective effect between lock, graphene oxide and gel fracture inhibits the extension of crackle, graphene oxide to promote cement
The formation of aquation and strong interface active force fundamentally improves the anti-of concrete (cement paste, cement mortar and concrete)
Tensile strength, flexural strength, compression strength etc..Meanwhile be suitably incorporated graphene oxide and improve the microporous structure of concrete, it carries
High concrete chloride-penetration resistance, anti-carbonation and anti-freezing property etc..At present, the production technology cost of graphene oxide concrete compared with
It is high, it is difficult to industrially to mass produce.
Invention content
The present invention provides a kind of C70 High-performance graphite oxide alkene concrete for mixing microballon flyash and preparation method thereof, this
The match ratio of invention optimizing raw material, and production technology is optimized, the C70 High-performance graphite oxides alkene concrete is made not only to meet
Intensity requirement, and price is low, reduces the production cost of enterprise.
To achieve the above object, the present invention uses following technical proposals.
A kind of C70 High-performance graphite oxide alkene concrete for mixing microballon flyash, the concrete include following mass parts
Several raw materials：391.85 parts of cement, 166 parts of water, 570 parts of natural river sand, 1205 parts of rubble, 69.15 parts of microballon flyash, poly- carboxylic
Sour 9.22 parts of high efficiency water reducing agent, 17.288 parts of graphene oxide solution raw material aoxidize stone in the graphene oxide solution raw material
Black alkene nanometer sheet solid content is 1.6%, and stannic oxide/graphene nano lamellar spacing is 1~2nm, and piece diameter is 10 μm, purity ＞
99%, and stannic oxide/graphene nano piece surface has a large amount of oxygen-containing groups, has good hydrophily, it is non-conductive.
Further, the cement is P.42.5R Portland cement, and good with high-efficiency water-reducing agent of poly-carboxylic acid compatibility
It is good；The fineness modulus of the natural river sand is 2.6, bulk density 1450kg/m3；The high-efficiency water-reducing agent of poly-carboxylic acid density is
1.0~1.1g/ml, solid content are 18%~20%, and pH value is 6~7, water-reducing rate 15%~30%, 7d, 28d compressive strength rate
Not less than 180%；The rubble is basaltic broken stone, and the ballast grain sizes are matched for 5~10mm, 10~16mm and 16~20mm's
Than being 5: 3: 2, the maximum particle diameter of the rubble is 20mm, and intensity is not less than 100MPa.
Further, the ball density 2.52kg/dm of the microballon flyash3, fineness d90<10um, glue sand water requirement
Than 90% or so；
Further, the graphene oxide solution raw material is prepared by following methods：
1) it is 10~20 μm to select particle size, and the graphite or expanded graphite that purity is 99% are raw material；
2) graphite raw material and sodium nitrate are added in concentrated sulfuric acid solution, the mass ratio of wherein graphite raw material and sodium nitrate is
1∶1；
3) solution for being obtained step 2) carries out ice bath processing, and in ice bath processing procedure, molten into step 2)
Potassium permanganate is slowly added in liquid, the wherein mass ratio of potassium permanganate and graphite raw material is 3: 1~8: 1, after mixing, by this
Solution is warming up to 50~80 DEG C and carries out further oxidation reaction；
4) it treats in step 3) after the oxidation reaction of solution, solution to be poured into deionized water, and add in hydrogen peroxide and remove
Extra potassium permanganate is removed, so as to obtain the graphene oxide solution of glassy yellow；
5) graphene oxide solution obtained in step 4) is subjected to centrifugal treating, and is washed repeatedly with deionized water, most
Graphene oxide solution raw material is obtained eventually.
A kind of preparation method of C70 High-performance graphite oxide alkene concrete for mixing microballon flyash, includes the following steps：
(1) 9.22 parts of high performance water reducing agent of polyocarboxy acid are added in 166 parts of water, uniform stirring 90s is denoted as solution 1；
(2) 17.288 parts of graphene oxide solution raw material is added in solution 1, uniform stirring 90s is treated after being stirred
With being denoted as solution 2；
(3) it by 391.85 parts of cement and 69.15 parts of microballon flyash, then sequentially adds with 570 parts of natural river sands and solution 2
In blender, the uniform stirring 120s under conditions of rotating speed is 2.5m/s；
(4) and then by 1205 parts of rubbles it adds in, the uniform stirring 150s under conditions of rotating speed rotating speed is 1.5m/s, discharging,
The graphene oxide concrete mix prepared；
(5) graphene oxide mortar mix is poured into mold, filled in two times, filled mold 1/2 every time, be placed on
Shake table jolt ramming, each jolt ramming 60 times, avoids cross to shake, finally after its molding, carries out oxygen shield.
Further, the oxygen maintaining method includes the following steps：
A. after graphene oxide mortar mix is poured into die for molding and jolt ramming, temperature is placed on as 20 ± 2 DEG C, phase
To 48 hours in the standard curing room of Shi Du≤95%, then form removal；
B. after form removal, test specimen is placed in the water tank in standard curing room, maintenance to required age, water tank solution is full
With Ca (OH)2Solution, temperature are 20 ± 2 DEG C.
Beneficial effects of the present invention are：The present invention is added to microballon flyash, and microballon flyash is to utilize high-quality fly ash
A kind of sub-micron, perfectly positive spherical powder ultra-fine and that there is continuous ionic exchange selected by Particular craft, being process
Body product；The active high and low heat of hydration of microballon flyash, light, corrosion-resistant, compression strength is high, good fluidity and thermostabilization
Property the excellent function such as good；The main chemical compositions of microballon flyash are SiO2And Al2O3, the Ca with hydrated reaction of cement releasing
(OH)2It can react rapidly, form the hyrate of calcium silicates and entringite type, the hole of maturing can be filled, make concrete
With higher intensity, moreover it is possible to improve its erosion-resistant ability, enhance the durability of concrete；The particle shape formula of microballon flyash
Very regular circular, grain size is small, and ball is acted on than general flyash more preferably, and water requirement very little, in high-strength and high performance
The ratio of mud can be reduced in concrete, reduces the viscosity of concrete mix, pumpability is improved, conducive to super high-rise pumping；
The water-reducing agent that the present invention adds is high performance water reducing agent of polyocarboxy acid, and the high performance water reducing agent of polyocarboxy acid is to use to divide
Minor structure design principle, based on DLVO electrical charge rejections theory and space steric effect theory, by the work with different function
Property group, which is grafted on main chain, to be polymerized.The main chain of high performance water reducing agent of polyocarboxy acid molecule is firmly adsorbed in cement granules table
Face can effectively hinder hydration reaction to improve its and protect plasticity, and branch is then enclosed in cement granules surrounding, play steric hindrance with
The double action of electrostatic repulsion, thus with better dispersibility and water-reducing effect；
The present invention adds graphene oxide solution raw material by the mixing ratio of optimizing raw material, and graphene oxide has
Many excellent performances, such as high-tensile, large scale surface area, better hydrophily and cheap price, and do not lead
Electricity so that graphene oxide is more suitable for answering with concrete than other nano materials (such as nano particle, carbon nanotube, graphene)
It closes, not only meets concrete made of making and meet intensity requirement, but also price is low；
The C70 high performance concrete slumps prepared according to the present invention meet engine request, and Anti-Chloride Ion Penetration is excellent
It is good.The C70 High-performance graphite oxide alkene concrete prices of fly ash prepared by the present invention are that other technologies prepare similar production
The half of product price；Meanwhile compared with the design of other C70 high performance concretes and preparation, prepared by the present invention identical
The C70 High-performance graphite oxide alkene concrete cements dosage of performance reduces 18%.Meanwhile the reduction of cement consumption, favorable environment
Protection.
Specific embodiment
The technique effect of the design of the present invention, concrete structure and generation is carried out below with reference to embodiment clear, complete
Ground describes, to be completely understood by the purpose of the present invention, feature and effect.Obviously, described embodiment is the one of the present invention
Section Example rather than whole embodiments, based on the embodiment of the present invention, those skilled in the art is not paying creativeness
The other embodiment obtained under the premise of labour, belongs to the scope of protection of the invention.Each technology in the invention
Feature, can be with combination of interactions under the premise of not conflicting conflict.
A kind of preparation method of C70 High-performance graphite oxide alkene concrete for mixing microballon flyash, includes the following steps：
(1) 9.22 parts of high performance water reducing agent of polyocarboxy acid are added in 166 parts of water, uniform stirring 90s is denoted as solution 1.
(2) 17.288 parts of graphene oxide solution raw material is added in solution 1, uniform stirring 90s is treated after being stirred
With being denoted as solution 2；
Wherein, stannic oxide/graphene nano piece solid content is 1.6% in the graphene oxide solution raw material, graphene oxide
Nanoscale twins thickness be 1~2nm, piece diameter be 10 μm, purity ＞ 99%, and stannic oxide/graphene nano piece surface have largely contain
Oxygen groups have good hydrophily, non-conductive；The graphene oxide solution raw material is prepared by following methods：
1) it is 10~20 μm to select particle size, and the graphite or expanded graphite that purity is 99% are raw material；
2) graphite raw material and sodium nitrate are added in concentrated sulfuric acid solution, the mass ratio of wherein graphite raw material and sodium nitrate is
1∶1；
3) solution for being obtained step 2) carries out ice bath processing, and in ice bath processing procedure, molten into step 2)
Potassium permanganate is slowly added in liquid, the wherein mass ratio of potassium permanganate and graphite raw material is 3: 1~8: 1, after mixing, by this
Solution is warming up to 50~80 DEG C and carries out further oxidation reaction；
4) it treats in step 3) after the oxidation reaction of solution, solution to be poured into deionized water, and add in hydrogen peroxide and remove
Extra potassium permanganate is removed, so as to obtain the graphene oxide solution of glassy yellow；
5) graphene oxide solution obtained in step 4) is subjected to centrifugal treating, and is washed repeatedly with deionized water, most
Graphene oxide solution raw material is obtained eventually.
(3) it by 391.85 parts of cement and 69.15 parts of microballon flyash, then sequentially adds with 570 parts of natural river sands and solution 2
In blender, the uniform stirring 120s under conditions of rotating speed rotating speed is 2.5m/s；
Wherein, the cement is P.42.5R Portland cement, and good with high-efficiency water-reducing agent of poly-carboxylic acid compatibility；
The fineness modulus of the natural river sand is 2.6, bulk density 1450kg/m3；The high-efficiency water-reducing agent of poly-carboxylic acid density is 1.0
~1.1g/ml, solid content are 18%~20%, and pH value is 6~7, water-reducing rate 15%~30%, and 7d, 28d compressive strength rate is not low
In 180%；The ball density 2.52kg/dm of the microballon flyash3, fineness d90<10um, ratio of water dosage 90% are left
It is right.
(4) and then by 1210 parts of rubbles add in, the uniform stirring 150s under conditions of rotating speed is 1.5m/s, discharge to get
To the graphene oxide concrete mix of preparation；
Wherein, the rubble is basaltic broken stone, and the ballast grain sizes are 5~10mm, 10~16mm and 16~20mm
It is 5: 3: 2 to match, and the maximum particle diameter of the rubble is 20mm, and intensity is not less than 100MPa.
(5) graphene oxide mortar mix is poured into mold, filled in two times, filled mold 1/2 every time, be placed on
Shake table jolt ramming, each jolt ramming 60 times, avoids cross to shake, finally after its molding, carries out oxygen shield；Wherein described oxygen maintaining method includes
Following step：
A. after graphene oxide mortar mix is poured into die for molding and jolt ramming, temperature is placed on as 20 ± 2 DEG C, phase
To 48 hours in the standard curing room of Shi Du≤95%, then form removal；
B. after form removal, test specimen is placed in the water tank in standard curing room, maintenance to required age, water tank solution is full
With Ca (OH)2Solution, temperature are 20 ± 2 DEG C.
Table 1 for the present invention prepare graphene oxide concrete slump, 28 days compression strength and flexural strength, 28 days it is non-
Stable state chloride ion transport coefficient.Graphene oxide concrete slump is for 210,28d compression strength concrete as known from Table 1
76.96MPa, 28d concrete flexural strength are 17.33MPa, and unstable state chloride ion transport coefficient is 0.56X10 within 28 days-12m2/s。
It can be seen that meet engine request according to concrete slump prepared by the present invention, and the intensity of concrete is high, resisting chloride ion penetration
Permeance property is excellent.
1 graphene oxide concrete slump of table, 28 days compression strength and flexural strength, day unstable state chloride ion transport system
Number
The better embodiment of the present invention is illustrated, but the invention is not limited to the implementation above
Example, those skilled in the art can also make various equivalent modifications under the premise of without prejudice to spirit of the invention or replace
It changes, these equivalent modifications or replacement are all contained in the application claim limited range.
Claims (6)
1. a kind of C70 High-performance graphite oxide alkene concrete for mixing microballon flyash, which is characterized in that under the concrete includes
State the raw material of mass fraction：314.5 parts of cement, 166 parts of water, 570 parts of natural river sand, 1205 parts of rubble, microballon flyash 69.15
Part, 9.22 parts of high-efficiency water-reducing agent of poly-carboxylic acid, 17.288 parts of graphene oxide solution raw material, in the graphene oxide solution raw material
Stannic oxide/graphene nano piece solid content is 1.6%, and stannic oxide/graphene nano lamellar spacing is 1~2nm, and piece diameter is 10 μm, pure
＞ 99% is spent, and stannic oxide/graphene nano piece surface has a large amount of oxygen-containing groups, there is good hydrophily, it is non-conductive.
2. a kind of C70 High-performance graphite oxide alkene concrete for mixing microballon flyash according to claim 1, feature exist
In the cement is P.42.5R Portland cement, and good with high-efficiency water-reducing agent of poly-carboxylic acid compatibility；The natural river
Husky fineness modulus is 2.6, bulk density 1450kg/m3；The high-efficiency water-reducing agent of poly-carboxylic acid density is 1.0~1.1g/ml,
Solid content is 18%~20%, and pH value is 6~7, and water-reducing rate 15%~30%, 7d, 28d compressive strength rate is not less than 180%；Institute
Rubble is stated as basaltic broken stone, the ballast grain sizes are 5~10mm, the proportioning of 10~16mm and 16~20mm are 5: 3: 2, described
The maximum particle diameter of rubble is 20mm, and intensity is not less than 100MPa.
3. a kind of C70 High-performance graphite oxide alkene concrete for mixing microballon flyash according to claim 1, feature exist
In the ball density 2.52kg/dm of the microballon flyash3, fineness d90<10um, ratio of water dosage 90%.
4. a kind of C70 High-performance graphite oxide alkene concrete for mixing microballon flyash according to claim 1, feature exist
In：
1) it is 10~20 μm to select particle size, and the graphite or expanded graphite that purity is 99% are raw material；
2) graphite raw material and sodium nitrate are added in concentrated sulfuric acid solution, wherein the mass ratio of graphite raw material and sodium nitrate is 1: 1；
3) solution for being obtained step 2) carries out ice bath processing, and in ice bath processing procedure, in the solution into step 2)
Potassium permanganate is slowly added to, the wherein mass ratio of potassium permanganate and graphite raw material is 3: 1~8: 1, after mixing, by this solution
It is warming up to 50~80 DEG C and carries out further oxidation reaction；
4) treat in step 3) that after the oxidation reaction of solution, solution is poured into deionized water, and add in hydrogen peroxide remove it is more
Remaining potassium permanganate, so as to obtain the graphene oxide solution of glassy yellow；
5) graphene oxide solution obtained in step 4) is subjected to centrifugal treating, and is washed repeatedly with deionized water, final
To graphene oxide solution raw material.
5. a kind of preparation method of C70 High-performance graphite oxide alkene concrete for mixing microballon flyash, which is characterized in that including under
State step：
(1) 9.22 parts of high performance water reducing agent of polyocarboxy acid are added in 166 parts of water, uniform stirring 90s is denoted as solution 1；
(2) 17.288 parts of graphene oxide solution raw material is added in solution 1, uniform stirring 90s, it is for use after being stirred,
It is denoted as solution 2；
(3) by 391.85 parts of cement and 69.15 parts of microballon flyash, then with 570 parts of natural river sands and solution 2 stirring is sequentially added
In machine, the uniform stirring 120s under conditions of rotating speed rotating speed is 2.5m/s；
(4) and then by 1205 parts of rubbles it adds in, the uniform stirring 150s under conditions of rotating speed is 1.5m/s, discharges to get to system
Standby graphene oxide concrete mix；
(5) graphene oxide mortar mix is poured into mold, filled in two times, filled mold 1/2 every time, be placed on vibration
Platform jolt ramming, each jolt ramming 60 times, avoids cross to shake, finally after its molding, carries out oxygen shield.
6. according to a kind of preparation of C70 High-performance graphite oxide alkene concrete for mixing microballon flyash described in claim 5
Method, which is characterized in that the oxygen maintaining method includes the following steps：
A. after graphene oxide mortar mix is poured into die for molding and jolt ramming, be placed on temperature for 20 ± 2 DEG C, it is relatively wet
48 hours in the standard curing room of Du≤95%, then form removal；
B. after form removal, test specimen is placed in the water tank in standard curing room, maintenance to required age, water tank solution is saturation Ca
(OH)2Solution, temperature are 20 ± 2 DEG C.
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| CN112250392B (en) * | 2020-11-03 | 2022-09-13 | 华电电力科学研究院有限公司 | Artificial macadam for road construction and preparation method thereof |
| CN112573865A (en) * | 2020-12-07 | 2021-03-30 | 燕山大学 | High-strength high-impermeability few-layer graphene concrete and preparation method thereof |
| CN114853418A (en) * | 2022-05-06 | 2022-08-05 | 中国十七冶集团有限公司 | High-strength concrete for CL heat preservation integration |
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