CN108101040A - A kind of low cost graphene oxide mortar and preparation method thereof - Google Patents
A kind of low cost graphene oxide mortar and preparation method thereof Download PDFInfo
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 94
- 229910021389 graphene Inorganic materials 0.000 title claims abstract description 75
- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 33
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 239000002994 raw material Substances 0.000 claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000004568 cement Substances 0.000 claims abstract description 18
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 16
- 239000004576 sand Substances 0.000 claims abstract description 7
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims abstract 4
- 229910002804 graphite Inorganic materials 0.000 claims description 17
- 239000010439 graphite Substances 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 16
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 claims description 14
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
- 239000012286 potassium permanganate Substances 0.000 claims description 9
- 238000007254 oxidation reaction Methods 0.000 claims description 8
- 229910052760 oxygen Inorganic materials 0.000 claims description 8
- 239000001301 oxygen Substances 0.000 claims description 8
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 6
- 239000008367 deionised water Substances 0.000 claims description 6
- 229910021641 deionized water Inorganic materials 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
- 235000010344 sodium nitrate Nutrition 0.000 claims description 6
- 239000004317 sodium nitrate Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- 230000010148 water-pollination Effects 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 4
- 239000011398 Portland cement Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 238000010792 warming Methods 0.000 claims description 3
- 240000007594 Oryza sativa Species 0.000 claims 1
- 235000007164 Oryza sativa Nutrition 0.000 claims 1
- 235000009566 rice Nutrition 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 7
- 239000004567 concrete Substances 0.000 abstract description 4
- 239000002131 composite material Substances 0.000 description 12
- 230000000694 effects Effects 0.000 description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 150000001735 carboxylic acids Chemical class 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 150000001336 alkenes Chemical class 0.000 description 3
- 239000011083 cement mortar Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000002086 nanomaterial Substances 0.000 description 3
- 239000002041 carbon nanotube Substances 0.000 description 2
- 229910021393 carbon nanotube Inorganic materials 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 230000001418 larval effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 230000002742 anti-folding effect Effects 0.000 description 1
- 230000003487 anti-permeability effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- -1 high-tensile Chemical class 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 239000006072 paste Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000003335 steric effect Effects 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
- 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
-
- 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 inexpensive graphene oxide mortars and preparation method thereof, and the graphene oxide mortar includes the raw material of following mass fractions：450 parts of cement, 180 parts of water, 1350 parts of natural river sand, 0.9 part of high-efficiency water-reducing agent of poly-carboxylic acid, 16.9 parts of graphene oxide solution raw material；The proportioning of the preparation method of the graphene oxide mortar including raw material, the mixing of raw material are poured, are molded and conserved, and preparation method is simple to operation.The graphene oxide mortar prepared using the present invention, pass through the mixing ratio of optimizing raw material, and addition graphene oxide solution raw material, not only meet concrete made of making and meet intensity requirement, and price is low, and the graphene oxide mortar price prepared by the present invention is the half that other technologies prepare similar product price.
Description
Technical field
The invention belongs to building material technical fields, more particularly to cement-base composite material preparation method technical field.
Background technology
Cement-base composite material, such as cement mortar are widely used in the buildings such as industry and civil buildings, bridge, harbour
Engineering field.It is reported that the whole world produces 3,600,000,000 cement every year since 2011, wherein during more than 55 percent comes from
State.Cement-base composite material have advantages of higher compressive strength, but high brittleness, tensile strength are low, ductility and toughness are poor, it is easy to crack and
Low anti-permeability performance, under the collective effect of the factors such as mechanical load and environmental load, endurance quality reduces, and structure is broken in advance
Bad or failure.Meanwhile green and sustainable development are the certainty in epoch, largely use cement-base composite material, it is necessary to produce big
Cement is measured, 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) ratio of mud is reduced, problem present in 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 cement-base composite material and durable
The effect of property is limited.Meanwhile ratio of mud reduction means that cement consumption increases, price accordingly increases, and mass production cement
More environmental pollutions can be generated；
(2) the problem of addition fiber (such as carbon fiber, steel fibre, glass fibre), this method is primarily present is the technology
It, can not be fundamentally simply from the crack growth for macroscopically preventing cement-base composite material, but without improving hydrated cementitious ability
Improve gel microstructure, thus to improve cement-base composite material intensity and durability effect it is limited；
(3) flyash, silica flour, the Separate Fine-grained Minerals city ingredient such as ultrafine slag are added, the problem of this method is primarily present is
Make gel more closely knit by filling, but no raising hydrated cementitious ability, it can not fundamentally improve gel microstructure, because
And the effect to improving cement-base composite material intensity and durability is limited；
(4) the problem of addition carbon nanotubes, 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 to improving cement-base composite material intensity and durable
The effect of property is limited.And price is high, is unfavorable for promoting and applying.
Graphene is a kind of new two-dimension nano materials, by scientists such as Novoselov and Geim in success in 2004
Ground is separated from graphite, it not only has very high tensile strength and elasticity modulus, but also also excellent electric conductivity
The specific surface area of energy, heat conductivility and super large.Graphene oxide is product of the graphene after oxidation processes, it inherits stone
The black many excellent performances of alkene, such as high-tensile, bigger serface, better hydrophily and cheap price, and not
It is conductive so that graphene oxide is more suitable for compound with cement-based material than other nano materials, and graphene oxide is wrinkly
The strong collective effect that surface and gel are generated between mechanical self-latching, graphene oxide and gel fracture inhibits the expansion of crackle
Exhibition, graphene oxide promote the formation of hydrated cementitious and strong interface active force, fundamentally improve cement-base composite material
Tensile strength, flexural strength, the compression strength of (cement paste, cement mortar and concrete) etc..Meanwhile it is suitably incorporated oxidation stone
Black alkene improves the microporous structure of cement-base composite material, improve cement-base composite material chloride-penetration resistance, anti-carbonation and
Anti-freezing property etc..But at present, graphene oxide mortar manufacturing cost is excessively high, it is difficult to applied to industrial production.
The content of the invention
The present invention provides a kind of inexpensive graphene oxide mortar and preparation method thereof, the cooperation of optimizing raw material of the present invention
Than optimizing the production technology of graphene oxide mortar, the graphene oxide mortar being made not only to meet intensity requirement, but also valency
Lattice are low, reduce the production cost of enterprise.
To achieve the above object, the present invention uses following technical proposals.
A kind of low cost graphene oxide mortar, which is characterized in that the graphene oxide mortar includes following mass parts
Several raw materials：450 parts of cement, 180 parts of water, 1350 parts of natural river sand, 0.9 part of high-efficiency water-reducing agent of poly-carboxylic acid, graphene oxide are molten
16.9 parts of liquid raw material, 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 footpath be 10 μm, purity ＞ 99%, and stannic oxide/graphene nano piece surface have largely contain
Oxygen groups have good hydrophily, 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 modulus of fineness 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%.
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, it is 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) treat in step 3) after the oxidation reaction of solution, solution to be poured into deionized water, and adds in hydrogen peroxide and removes
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 low cost graphene oxide mortar, comprises the following steps：
(1) 0.9 part of high performance water reducing agent of polyocarboxy acid is added in 180 parts of water, uniform stirring 90s is denoted as solution 1；
(2) 16.9 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) 450 parts of cement and solution 2 are sequentially added in mixer, uniformly mixes slowly 30s；
(4) the adding in 1350 parts of natural river sands in mixers at the uniform velocity and then in 30s, quickly stirs 60s, stops 90s, most
Uniformly quick stirring 60s, discharging obtain prepared graphene oxide mortar mix afterwards；
(5) graphene oxide mortar mix is poured into mold, filled at twice, 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 shaping, carries out oxygen shield.
Further, the oxygen maintaining method comprises 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
When small in the standard curing room of wet degree≤95% 48, 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 water-reducing agent that the present invention adds be high performance water reducing agent of polyocarboxy acid, the polycarboxylic acids
High-performance water reducing agent is with Molecular Design principle, using DLVO electrical charge rejections theory and space steric effect theory as base
Active group with difference in functionality is grafted on main chain and is polymerized by plinth.The main chain of high performance water reducing agent of polyocarboxy acid molecule
It firmly adsorbs in cement particle surface, hydration reaction can effectively be hindered to improve it and protect plasticity, branch is then enclosed in cement
Particle surrounding plays a dual role of steric hindrance and 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 than other nano materials (such as nano particle, carbon nanotubes, graphene) and cement-based material
It is compound, not only meet concrete made of making and meet intensity requirement, but also price is low, the graphene oxide sand prepared by the present invention
Slurry price is the half that other technologies prepare similar product price.
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 on the premise of work, belongs to the scope of protection of the invention.Each technology in the invention
Feature, can be with combination of interactions on the premise of not conflicting conflict.
A kind of preparation method of low cost graphene oxide mortar, comprises the following steps：
(1) 0.9 part of high performance water reducing agent of polyocarboxy acid being added in 180 parts of water, uniform stirring 90s is denoted as solution 1,
Middle high-efficiency water-reducing agent of poly-carboxylic acid density is 1.0~1.1g/ml, and solid content is 18%~20%, and pH value is 6~7, water-reducing rate 15%
~30%, 7d, 28d compressive strength rate are not less than 180%, and stannic oxide/graphene nano piece is consolidated in the graphene oxide solution raw material
Content is 1.6%, and stannic oxide/graphene nano lamellar spacing is 1~2nm, and piece footpath is 10 μm, purity ＞ 99%, and graphite oxide
Alkene nanometer sheet surface has a large amount of oxygen-containing groups, has good hydrophily, non-conductive.
(2) 16.9 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, the graphene oxide solution raw material is to prepare as follows：
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, it is 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) treat in step 3) after the oxidation reaction of solution, solution to be poured into deionized water, and adds in hydrogen peroxide and removes
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) 450 parts of cement and solution 2 are sequentially added in mixer, 30s is uniformly mixed slowly, wherein the cement is
P.42.5R Portland cement, and it is good with high-efficiency water-reducing agent of poly-carboxylic acid compatibility；The modulus of fineness of natural river sand is 2.6,
Bulk density is 1450kg/m3。
(4) the adding in 1350 parts of natural river sands in mixers at the uniform velocity and then in 30s, quickly stirs 60s, stops 90s, most
Uniformly quick stirring 60s, discharging obtain prepared graphene oxide mortar mix afterwards.
(5) graphene oxide mortar mix is poured into mold, filled at twice, 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 shaping, carries out oxygen shield, the 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
When small in the standard curing room of wet degree≤95% 48, 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 is strong by the compression strength of the graphene oxide mortar different larval instar of the method for the invention preparation and anti-folding
Degree.It can be seen that in the stannic oxide/graphene nano piece incorporation mortar of appropriate volume, adjustment effect is played to hydrated cementitious, is significantly carried
High cement mortar obtains mechanical property.
The compression strength and flexural strength of 1 graphene oxide mortar different larval instar of table
The better embodiment of the present invention is illustrated above, but the invention is not limited to the implementation
Example, those skilled in the art can also make a variety of equivalent modifications on 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 (5)
1. a kind of low cost graphene oxide mortar, which is characterized in that the graphene oxide mortar includes following mass fractions
Raw material：450 parts of cement, 180 parts of water, 1350 parts of natural river sand, 0.9 part of high-efficiency water-reducing agent of poly-carboxylic acid, graphene oxide solution
16.9 parts of raw material, stannic oxide/graphene nano piece solid content is 1.6% in the graphene oxide solution raw material, and graphene oxide is received
Rice lamellar spacing is 1~2nm, and piece footpath is 10 μm, purity ＞ 99%, and stannic oxide/graphene nano piece surface is with a large amount of oxygen-containing
Group has good hydrophily, non-conductive.
2. a kind of inexpensive graphene oxide mortar according to claim 1, which is characterized in that the cement is
P.42.5R Portland cement, and it is good with high-efficiency water-reducing agent of poly-carboxylic acid compatibility；The modulus of fineness 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 for 18%~
20%, pH value is 6~7, and water-reducing rate 15%~30%, 7d, 28d compressive strength rate is not less than 180%.
3. a kind of inexpensive graphene oxide mortar according to claim 1, which is characterized in that the graphene oxide is molten
Liquid 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, 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.
4. a kind of preparation method of low cost graphene oxide mortar, which is characterized in that comprise the following steps：
(1) 0.9 part of high performance water reducing agent of polyocarboxy acid is added in 180 parts of water, uniform stirring 90s is denoted as solution 1；
(2) 16.9 parts of graphene oxide solution raw material is added in solution 1, uniform stirring 90s, for use after being stirred, note
For solution 2；
(3) 450 parts of cement and solution 2 are sequentially added in mixer, uniformly mixes slowly 30s；
(4) the adding in 1350 parts of natural river sands in mixers at the uniform velocity and then in 30s, quickly stirs 60s, stops 90s, it is last
Even quick stirring 60s, discharging obtain prepared graphene oxide mortar mix；
(5) graphene oxide mortar mix is poured into mold, filled at twice, 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 shaping, carries out oxygen shield.
5. according to a kind of preparation method of inexpensive graphene oxide mortar described in claim 4, which is characterized in that described
Oxygen maintaining method comprises 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
Degree≤95% standard curing room in 48 it is small when, 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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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110054453A (en) * | 2018-12-29 | 2019-07-26 | 蒋成飞 | A kind of graphene oxide cement mortar |
| CN110550919A (en) * | 2019-09-29 | 2019-12-10 | 北京工业大学 | method for improving chloride ion permeation resistance of cement-based material |
| CN110857246A (en) * | 2018-08-22 | 2020-03-03 | 西安理工大学 | Graphene oxide compounded cement mortar and preparation method thereof |
| CN111285647A (en) * | 2020-02-17 | 2020-06-16 | 佛山高途新材料科技有限公司 | Environment-friendly graphene oxide mortar and preparation method thereof |
| CN111392721A (en) * | 2020-03-26 | 2020-07-10 | 重庆永固新型建材有限公司 | Graphene oxide dispersion liquid and preparation method and application thereof |
| CN112876152A (en) * | 2021-03-11 | 2021-06-01 | 湖南春天环保建材有限公司 | Novel graphene dry-mixed mortar and preparation method thereof |
| CN113173745A (en) * | 2021-04-24 | 2021-07-27 | 华北水利水电大学 | Anti-freezing cemented sand gravel composite material |
| CN113336500A (en) * | 2021-06-25 | 2021-09-03 | 亚士漆(上海)有限公司 | Adhesive mortar and preparation method and application thereof |
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| CN111285647A (en) * | 2020-02-17 | 2020-06-16 | 佛山高途新材料科技有限公司 | Environment-friendly graphene oxide mortar and preparation method thereof |
| CN111392721A (en) * | 2020-03-26 | 2020-07-10 | 重庆永固新型建材有限公司 | Graphene oxide dispersion liquid and preparation method and application thereof |
| CN112876152A (en) * | 2021-03-11 | 2021-06-01 | 湖南春天环保建材有限公司 | Novel graphene dry-mixed mortar and preparation method thereof |
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| CN113336500A (en) * | 2021-06-25 | 2021-09-03 | 亚士漆(上海)有限公司 | Adhesive mortar and preparation method and application thereof |
| CN113480257A (en) * | 2021-07-07 | 2021-10-08 | 佛山高途新材料科技有限公司 | Ultrahigh-performance concrete with high breaking strength and preparation method thereof |
| CN115417640A (en) * | 2022-08-31 | 2022-12-02 | 上海锦深建设工程有限公司 | MGO modified cement mortar in low-temperature curing environment and preparation method thereof |
| CN115417640B (en) * | 2022-08-31 | 2023-08-04 | 上海锦深建设工程有限公司 | MGO modified cement mortar in low-temperature maintenance environment and preparation method thereof |
| CN115231880A (en) * | 2022-09-22 | 2022-10-25 | 太原理工大学 | Coal series metakaolin-graphene oxide cement mortar composite material and preparation method thereof |
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