CN109467364A - A kind of graphene concrete and preparation method thereof - Google Patents
A kind of graphene concrete and preparation method thereof Download PDFInfo
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- CN109467364A CN109467364A CN201811513723.6A CN201811513723A CN109467364A CN 109467364 A CN109467364 A CN 109467364A CN 201811513723 A CN201811513723 A CN 201811513723A CN 109467364 A CN109467364 A CN 109467364A
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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
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/15—Nano-sized carbon materials
- C01B32/182—Graphene
- C01B32/184—Preparation
- C01B32/19—Preparation by exfoliation
-
- 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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/022—Carbon
- C04B14/024—Graphite
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Nanotechnology (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a kind of graphene concrete, the component including following parts by weight: 350 ~ 400 parts of cement, 700 ~ 750 parts of fine aggregate, 1000 ~ 1150 parts of coarse aggregate, 200 ~ 220 parts of graphene aqueous dispersions；The concentration of the graphene aqueous dispersions is 0.55 ~ 0.65 g/L；The graphene aqueous dispersions are prepared by graphite flake collocation surfactant through high shear liquid phase stripping method.Graphene aqueous dispersions are made by surfactant and high shear liquid phase stripping method in graphene concrete provided by the invention, have the characteristics that high-quality, high yield, low cost, and can be mass produced in practical applications.The graphene concrete can effectively regulate and control the microstructure of hydrolysis product of cement by high-quality, zero defect graphene, improve the performances such as the intensity, impermeability and durability of concrete.
Description
Technical field
The present invention relates to technical field of concrete, more particularly, to a kind of graphene concrete and preparation method thereof.
Background technique
The development of modern engineering technology is pushing the development of very-high performance construction material.In particular, concrete is the world
Upper most common construction material.In order to improve the physical and mechanical properties of concrete, need to be improved on nanoscale, this
Sample its chemically and physically mechanical property could really get a promotion.Because largely damage can trace caused by concrete
Chemically and physically defect into cement structures.The superior chemical and physical property of nano material are that the inner base of concrete mentions
Most effective raising has been supplied, and in recent years, the nanocrystallization technology progress of cement composite material makes to apply in structural strengthening, environment
Pollution reduction, self-cleaning material production etc. are applied.
Correlative study shows that compared with normal concrete, novel graphene concrete has unprecedented enhancing performance,
Its compression strength can be improved 146%, and flexural strength can be improved 79.5%, and the maximum displacement of contracting load can reduce 78%.At the same time, newly
Type graphene concrete electric hot property improves, and thermal capacity can increase by 88%.Its water penetration rate is significant to reduce nearly 400%, this is mixed
The characteristic of Xtah Crude Clay structure long durability extremely pursued, so that this advanced composite material (ACM) is preferably suited for by flood influence
Region building.Also, graphene is added in concrete now can reduce by 50% required concrete material, simultaneously
The requirement for bearing capacity of building is still met, this will lead to carbon emission amount and is greatly decreased.
However, method higher cost of the prior art by graphene dispersion in dry cement matrix powder, is related to complexity
Program, it is difficult to scale up, and may cause concrete mechanical property reduce.In addition, graphene is difficult in solvent
Also there are many difficulties in middle stable dispersion, prepare with scale, this greatly limits its applications, also limit graphene coagulation
The development of soil.
Therefore, it is badly in need of developing that a kind of excellent in mechanical performance, cost is relatively low, being capable of prepare with scale graphene concrete.
Summary of the invention
The present invention is to overcome the deficiency of mechanical property described in the above-mentioned prior art, higher cost, preparation process complicated and hardly possible
With the defect of prepare with scale, provide a kind of graphene concrete, the graphene mechanical performance of concrete provided is excellent, cost compared with
It is low, being capable of prepare with scale.
In order to solve the above technical problems, the technical solution adopted by the present invention is that:
A kind of graphene concrete, the component including following parts by weight:
350 ~ 400 parts of cement, 700 ~ 750 parts of fine aggregate, 1000 ~ 1150 parts of coarse aggregate, 200 ~ 220 parts of graphene aqueous dispersions；
The concentration of the graphene aqueous dispersions is 0.55 ~ 0.65 g/L；
The graphene aqueous dispersions are prepared by graphite flake collocation surfactant through high shear liquid phase stripping method.
The present invention prepares graphene aqueous dispersions, principle using high shear liquid phase stripping method are as follows: stripping process occurs
Inside the square hole head of high-shear mixer, wherein rotor blade is with very high speed (up to 8000 revs/min) opposite square hole head
Interior graphite flake is sheared.When graphite flake is trapped in the narrow space between rotor and head, rotor blade exists
The graphene layer that the shearing force generated in liquid couples weak (Van der Waals) separates.Meanwhile under the action of surfactant,
Water surface tension is reduced to match graphene, removing is made to become feasible, forms uniform mixture, and stablize the graphene peeled off
Nanometer sheet simultaneously prevents its aggregation, to obtain the graphene dispersing solution of stable dispersion.
Inventor using graphene aqueous dispersions prepared by above-mentioned high shear liquid phase stripping method the study found that can uniformly be divided
It is dispersed in cement matrix powder, graphene concrete obtained has superhigh intensity, excellent impermeability and durability, has excellent
Different mechanical property.Moreover, because the addition of graphene, increases the thermal capacity of concrete, the thermostabilization of concrete is enhanced
Property.
Moreover, processing routine of the preparation of above-mentioned graphene dispersing solution without complexity, without expansion or oxidation processes, only
It is made by surfactant and high shear liquid phase stripping method, the quality and removing graphene for significantly improving graphene are in water
Volume versus time dependence, graphene aqueous dispersions obtained are moderately good, production cost is low, can prepare with scale it is high-quality
Amount, zero defect graphene aqueous dispersions.It can be used to prepare graphene concrete on a large scale, there is great application value.
Preferably, the component including following parts by weight:
365 parts of cement, 730 parts of fine aggregate, 1095 parts of coarse aggregate, 208 parts of graphene aqueous dispersions；
The concentration of the graphene aqueous dispersions is 0.6 g/L.
Preferably, the ratio of the graphite flake and water is 10 ~ 15 g/L.It is highly preferred that the ratio of the graphite flake and water
For 12.5 g/L.The graphene aqueous dispersions are prepared by graphite flake, surfactant and water through high shear liquid phase stripping method
It obtains.The ratio of graphite flake and water is that 10 ~ 15 g/L refer to that 10 ~ 15g graphite flake is mixed with 1 L water.
Preferably, the surfactant is sodium taurocholate, and the ratio of the sodium taurocholate and water is 2 ~ 3g/L.It is highly preferred that institute
The ratio for stating sodium taurocholate and water is 2.5 g/L.The ratio of sodium taurocholate and water is 2 ~ 3g/L, is referred to, 2 ~ 3g sodium taurocholate is mixed with 1 L water.
Preferably, the fine aggregate is silica sand, the silica sand include (800 ~ 400) μm, (400 ~ 200) μm and (200 ~
100) quartz sand of μm three kinds of particle size ranges.
Preferably, the silica sand by (800 ~ 400) μm, (400 ~ 200) μm and (200 ~ 100) μm three kinds of particle size ranges stone
Sand in mass ratio 1: 0.2 ~ 0.3: 0.1 ~ 0.2 mixes.
It is highly preferred that the silica sand is by (800 ~ 400) μm, (400 ~ 200) μm and (200 ~ 100) μm of three kinds particle size ranges
Quartz sand in mass ratio 1: 0.286: 0.114 mixes.At this point, quartz sand can be realized dense packing, dense packing can
Air entrapment is efficiently reduced, mobility and compactness is improved, improves compression strength, the flexural strength of concrete.Do not changing material
Under conditions of expecting type, by control particle size range and mass ratio, the mechanical property of graphene concrete can be made to improve about
20%。
Preferably, the coarse aggregate is rubble, and the rubble includes two kinds of gravel particles of 5 ~ 10 mm and 10 ~ 16 mm.
Preferably, the mass fraction for the gravel particle that partial size is 5 ~ 10 mm in the rubble is 30% ~ 40%.
Preferably, the cement is portland cement.The portland cement can use 42.5R normal silicate water
Mud.
Preferably, the water in the graphene aqueous dispersions meets following require: 500 mg/ of pH > 5, chloride ion content <
L.Water for concrete generally requires the requirement of satisfaction " JGJ 63-2006 concrete water standard ".
The present invention also protects the preparation method of above-mentioned graphene concrete, and the preparation method includes the following steps:
S1. graphene aqueous dispersions are prepared；
S2. cement, fine aggregate, coarse aggregate and graphene aqueous dispersions are uniformly mixed, obtain the graphene concrete.
Above-mentioned graphene concrete in application process, graphene concrete can be poured into mold, using shake table
It vibrates molding；Again through for 24 hours after molding, demoulding.Water-bath maintenance can be carried out after demoulding.
Compared with prior art, the beneficial effects of the present invention are:
Graphene concrete is prepared by adding special zero defect graphene aqueous dispersions in the present invention, effectively improves coagulation
The physical property of soil.Graphene concrete obtained has superhigh intensity, and impermeability significantly improves, concrete structure
Long durability of backside protective sheet excellent.In addition, enhancing the thermal stability of concrete by the thermal capacity that addition graphene increases concrete.
The graphene aqueous dispersions are prepared by high shear liquid phase stripping method, significantly improve graphene quality and
The volume versus time dependence of graphene in water is removed, the zero defect graphene for allowing to generate the high yield more than 100 L/h is molten
Liquid.The graphene aqueous dispersions can replace water when preparing concrete, highly effective for preparing graphene concrete, and
Industrially expansible application.
In addition, the present invention realizes the dense packing of quartz sand by the particle size range and mass ratio of control silica sand, it can
Air entrapment is efficiently reduced, mobility and compactness is improved, improves compression strength, the flexural strength of concrete, do not changing material
Under the conditions of expecting type, by control particle size range and mass ratio, the mechanical property of graphene concrete can be made to further increase
About 20%.
Moreover, comprehensively considering the performance and raw material of graphene concrete provided by the invention, on the one hand, the graphene coagulation
Soil can reduce the dosage of cement, so that its carbon emission amount is greatly decreased, advantageously reduce environmental pollution, protect environment.Another party
Face, raw material types are few, only compared to normal concrete to be added to zero defect graphene aqueous dispersions, and the graphene water dispersion more
Liquid preparation is simple, cost is relatively low, and construction technology is simple, and engineering cost is low.
Specific embodiment
The present invention is further illustrated With reference to embodiment.
Embodiment 1
A kind of graphene concrete, preparation process are as follows:
S1. the graphene aqueous dispersions that concentration is 0.6g/L are prepared.
After 2.6028 kg graphite flakes and 0.5206 kg surfactant sodium taurocholate are mixed with 208 kg water, using height
Shear mixer is removed 2 hours at 5000 rpm.After the completion of removing, obtained suspension is decanted, obtaining concentration is
The graphene dispersing solution of 0.6g/L.
S2. 365 kg of cement, 730 kg of silica sand, 1095 kg of rubble, graphene moisture are added in forced mixer
208 kg of dispersion liquid stirs 10 minutes, obtains graphene concrete slurry.Cement uses 42.5R ordinary portland cement.Silica sand by
The quartz sand in mass ratio 1: 0.286: 0.114 of (800 ~ 400) μm, (400 ~ 200) μm and (200 ~ 100) μm three kinds of particle size ranges
It mixes.Rubble includes two kinds of gravel particles of 5 ~ 10 mm and 10 ~ 16 mm；Partial size is the gravel particle of 5 ~ 10 mm in rubble
Mass fraction be 30% ~ 40%.
S3. slurry is poured into mold in two times, pours into the half of volume every time, makes after slurry of every loading
It is vibrated 60 seconds with shake table.
S4. demoulding after standing one day outside room is placed in water-bath in sink at room temperature and conserves 28 days, solidified
Graphene concrete.
Comparative example 1
This comparative example the difference from embodiment 1 is that, the water of quality such as be added without graphene aqueous dispersions, but be added；
Other raw materials and step are same as Example 1.It is normal concrete that concrete, which is made, in this comparative example.
Test method
Testing concrete performance:
(1) compression strength: the test method of compression strength is referring to " standard for test methods of mechanical properties of ordinary concrete " GB/
The relevant regulations of T50081.
(2) elasticity modulus: the test method of compression strength is referring to " standard for test methods of mechanical properties of ordinary concrete " GB/
The relevant regulations of T50081.
(3) impervious:
1) test specimen being completely dried is immersed in the water, records initial water level；
2) after being immersed in the water 7 days, test specimen is taken out and is chiseled, record water penetrates into the infiltration water level of concrete structure；
3) it calculates initial water level and permeates the maximum distance (L) between water level, the evaluation criteria as concrete permeability resistance.
Test result
It is tested as the basic mechanical performance index and impermeability to cured graphene concrete made from embodiment 1,
As a result as shown in table 1 and table 2.
The result shows that graphene concrete made from embodiment 1, compared with the normal concrete of identical match ratio, 7 days anti-
Compressive Strength improves 19.5 % or so, and compression strength improves 15.57 % or so within 28 days, illustrates to utilize graphene water of the invention
Dispersion liquid, which prepares concrete, can be improved the early and late compression strength of concrete, can also be used as the early strength enhancing of concrete
Agent improves the Early-age behavior of concrete.
Meanwhile compared with the normal concrete of identical match ratio, ink alkene concrete seven day made from embodiment 1 and 28 days bullets
Property modulus has been respectively increased 11.9%, 21.2% or so.
And for graphene concrete obtained by embodiment 1, compared with the normal concrete of identical match ratio, water seeps
Saturating rate reduces 70.8% or so.
These results suggest that the basic of concrete can be improved by preparing concrete using graphene aqueous dispersions of the invention
Mechanical property, graphene concrete obtained have excellent mechanical property.Meanwhile anti-permeability performance is obviously improved.
1 basic mechanical performance test result of table
2 anti-permeability performance test result of table
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be to this hair
The restriction of bright embodiment.For those of ordinary skill in the art, it can also do on the basis of the above description
Other various forms of variations or variation out.There is no necessity and possibility to exhaust all the enbodiments.It is all in the present invention
Spirit and principle within made any modifications, equivalent replacements, and improvements etc., should be included in the guarantor of the claims in the present invention
Within the scope of shield.
Claims (10)
1. a kind of graphene concrete, which is characterized in that the component including following parts by weight:
350 ~ 400 parts of cement, 700 ~ 750 parts of fine aggregate, 1000 ~ 1150 parts of coarse aggregate, 200 ~ 220 parts of graphene aqueous dispersions；
The concentration of the graphene aqueous dispersions is 0.55 ~ 0.65 g/L；
The graphene aqueous dispersions are prepared by graphite flake collocation surfactant through high shear liquid phase stripping method.
2. graphene concrete according to claim 1, which is characterized in that the component including following parts by weight:
365 parts of cement, 730 parts of fine aggregate, 1095 parts of coarse aggregate, 208 parts of graphene aqueous dispersions；
The concentration of the graphene aqueous dispersions is 0.6 g/L.
3. graphene concrete according to claim 1 or 2, which is characterized in that the ratio of the graphite flake and water is 10
~15 g/L。
4. graphene concrete according to claim 1 or 2, which is characterized in that the surfactant is sodium taurocholate,
The ratio of the sodium taurocholate and water is 2 ~ 3 g/L.
5. graphene concrete according to claim 1 or 2, which is characterized in that the fine aggregate is silica sand, the silica sand
Quartz sand including (800 ~ 400) μm, (400 ~ 200) μm and (200 ~ 100) μm three kinds of particle size ranges.
6. graphene concrete according to claim 5, which is characterized in that the silica sand by (800 ~ 400) μm, (400 ~
μm 200) mixed with the quartz sand in mass ratio 1: 0.2 ~ 0.3: 0.1 ~ 0.2 of (200 ~ 100) μm three kinds of particle size ranges.
7. graphene concrete according to claim 1 or 2, which is characterized in that the coarse aggregate is rubble, described broken
Stone includes two kinds of gravel particles of 5 ~ 10 mm and 10 ~ 16 mm.
8. graphene concrete according to claim 7, which is characterized in that partial size is the broken of 5 ~ 10 mm in the rubble
The mass fraction of stone particle is 30% ~ 40%.
9. graphene concrete according to claim 1, which is characterized in that the cement is portland cement.
10. the preparation method of any one of the claim 1 ~ 9 graphene concrete, which comprises the steps of:
S1. graphene aqueous dispersions are prepared；
S2. cement, fine aggregate, coarse aggregate and graphene aqueous dispersions are uniformly mixed, obtain the graphene concrete.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110606769A (en) * | 2019-10-16 | 2019-12-24 | 洛阳理工学院 | Light high-strength gypsum composite material with electromagnetic shielding and absorption effects |
| CN112573865A (en) * | 2020-12-07 | 2021-03-30 | 燕山大学 | High-strength high-impermeability few-layer graphene concrete and preparation method thereof |
| CN114477881A (en) * | 2021-12-26 | 2022-05-13 | 广州盛门新材料科技有限公司 | Novel graphene concrete and preparation method thereof |
| CN114507047A (en) * | 2022-02-24 | 2022-05-17 | 哈尔滨工业大学（威海） | Graphene reinforced concrete and preparation method thereof |
| CN114892469A (en) * | 2022-04-21 | 2022-08-12 | 东南大学 | Graphene concrete-based heating road and using method thereof |
| CN117534427A (en) * | 2023-11-21 | 2024-02-09 | 美安新能源(江苏)有限公司 | Five-super inorganic cementing material and preparation method of product thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110606769A (en) * | 2019-10-16 | 2019-12-24 | 洛阳理工学院 | Light high-strength gypsum composite material with electromagnetic shielding and absorption effects |
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| CN114477881A (en) * | 2021-12-26 | 2022-05-13 | 广州盛门新材料科技有限公司 | Novel graphene concrete and preparation method thereof |
| CN114507047A (en) * | 2022-02-24 | 2022-05-17 | 哈尔滨工业大学（威海） | Graphene reinforced concrete and preparation method thereof |
| CN114892469A (en) * | 2022-04-21 | 2022-08-12 | 东南大学 | Graphene concrete-based heating road and using method thereof |
| CN117534427A (en) * | 2023-11-21 | 2024-02-09 | 美安新能源(江苏)有限公司 | Five-super inorganic cementing material and preparation method of product thereof |
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Application publication date: 20190315 |