CN112624725A - Conductive concrete composition capable of being rapidly cured and formed, preparation method and application thereof - Google Patents
Conductive concrete composition capable of being rapidly cured and formed, preparation method and application thereof Download PDFInfo
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- CN112624725A CN112624725A CN201910953340.9A CN201910953340A CN112624725A CN 112624725 A CN112624725 A CN 112624725A CN 201910953340 A CN201910953340 A CN 201910953340A CN 112624725 A CN112624725 A CN 112624725A
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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
- C04B28/34—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 cold phosphate binders
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/90—Electrical properties
- C04B2111/94—Electrically conducting materials
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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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/05—Materials having an early high strength, e.g. allowing fast demoulding or formless casting
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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
- 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 Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
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- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
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Abstract
The invention discloses a conductive concrete composition capable of being quickly cured and formed, and a preparation method and application thereof. The conductive concrete composition capable of being rapidly cured and formed comprises rapid-curing cement serving as a base material and conductive concrete composite slurry taking the base material as a reference, wherein the conductive concrete composite slurry comprises the following components in percentage by mass: 0.05-2% of graphene, 0.5-3% of a graphene dispersant, 0-40% of a conductive filler and 15-30% of water, wherein the fast curing cement is phosphorus magnesium cement. The conductive concrete composition has the advantages of fast mass production of concrete products with good conductivity, high mechanical strength, stable resistivity and good durability, improves the conductivity of the matrix material (the resistivity can reach 10 omega cm), accelerates the forming process (the curing can be carried out at room temperature within 30 min), and can be widely applied to the fields of electric heating, electric heating pavements and the like.
Description
Technical Field
The invention relates to a conductive concrete material, in particular to a graphene nanomaterial-based conductive concrete composition capable of being rapidly cured and formed, and a preparation method and application thereof, and belongs to the technical field of electric heating materials in functional materials.
Background
The house is a product which is adapted to and modified from nature in order to meet the needs of human beings, and is also a contradiction unity between human needs and nature, particularly in northeast severe cold areas and winter cold areas, the contradiction between the needs and conditions is more prominent, and building heating becomes an important problem. In the past, China mainly develops a heating mode taking hot water as a medium due to electric power shortage, however, coal resources in China are rapidly short, water resources in China are increasingly lacked, combustion hot water heating causes great waste to national resources, and heating smoke exhaust causes serious environmental pollution. Such as for various reasons, will eventually be replaced in the future. At present, the foreign central heating is basically withdrawn from the market.
The electric heating industry has 30 years of history in European and American countries, and due to the cleanness, sustainability and economy of electric energy, the outstanding advantages of the electric heating industry are commonly recognized by people at home and abroad. At present, electric energy is taken as measures for heating, heat preservation, snow melting, freezing prevention and the like, and the electric energy is developed vigorously abroad. The electric heating is a heating mode for converting electric energy into heat energy, is clean and environment-friendly, has the advantages that other heating modes are not comparable to each other when a user uses the electric heating for a long time, and is expected to become the mainstream of the heating industry. China has stable power resources and the second major country of capacity. The phenomenon that the generated electricity is excessive and cannot be stored exists in winter and at night, and the waste caused by low utilization efficiency of the electric energy in China is equivalent to the generated electricity of 2.3 three gorges power stations in one year. There is a pressing need to improve this resource waste phenomenon, so that the country benefits and the user benefits. Because the wasted electric power is calculated on our electricity price, the higher the utilization rate of the electric power is, the lower the use cost of the electric power is. The lower the electricity rate of the user will be.
With the concern and regulation of the country on haze, coal-fired heating reform and the like, the electric heating industry is strongly supported, a large number of policies are issued in various places, the price of the electric charge is also subjected to gradient charging, and the domestic electricity and the heating electricity are distinguished. Under preferential strength, the electric heating is developed in spring. At present, various electric heating modes exist in China, and have advantages and disadvantages. As an indoor heating material, firstly, safety and comfort are required, and then energy conservation and environmental protection are required. In recent years, floor heating using radiation as a main heating mode is developed rapidly, heating materials laid under floors mainly comprise heating cables, electric heating films and low-temperature hot water pipes, and many residences are put into use at present. Wherein, add into high-molecular polymer with graphite alkene or carbon nanotube, conductive carbon black etc. in, the electric heat membrane of preparation has electric heat conversion efficiency height, the intensification is fast, the heat dissipation is fast and characteristics with low costs, but the polymer is at the temperature rise and fall in-process that relapse ageing degradation can appear, influences the long-term stability of using of electric heat membrane, and electric heat membrane itself mechanical properties is relatively poor, unable bearing increases the construction degree of difficulty. Therefore, the firm and durable conductive concrete is expected to occupy a place in indoor heating.
The cement used in the conventional conductive concrete is usually portland cement, which is characterized by low price and abundant raw materials, but when the portland cement is used as a base material to prepare electric heating products (such as electric heating plates and the like), the defects of low hardening speed and long maintenance period exist, which are not beneficial to large-scale production and operation and limit the popularization of products. In addition, the existing preparation process of the conductive concrete is not mature enough, the discrete type of the resistivity test result is large, and meanwhile, the high-doped conductivity has a large influence on the strength of the conductive concrete and influences the service performance of concrete materials, such as graphite and steel fiber. Graphite is a substance with high carbon content, is singly used as a conductive medium to be filled into a cement system, and has the defects of large addition amount, uneven dispersion and poor mechanical property of the prepared electric heating material; the steel fiber is added into concrete as a metal product, so that the problem of corrosion is difficult to avoid, and the specific resistance of the concrete is increased along with the increase of the corrosion degree, so that the steel fiber is difficult to act on the concrete as a conductive filler. Therefore, the proper conductive phase and the reasonable preparation process are selected to achieve the unification of the dispersion of the conductive phase in the matrix and the electric and thermal conductivity, and simultaneously ensure the strength of the concrete material, which has become the research focus in the current conductive concrete field.
The advent of graphene has greatly promoted the innovationThe development of electrothermal materials. Graphene, a sheet-like two-dimensional carbon nanomaterial with a thickness of only one atomic diameter size (about 0.35nm), has surprising electrical conductivity with a carrier mobility of about 15000cm at room temperature2V · s; in addition, the graphene also has very good heat conduction performance, and the heat conduction coefficient of pure defect-free single-layer graphene is as high as 5300W/mK, so that the graphene is the carbon material with the highest heat conduction coefficient. The advantages of graphene make it a promising revolutionary material for the next generation. However, at present, the research on graphene at home and abroad mainly focuses on the fields of energy storage materials, piezoelectric materials, catalytic reduction materials and the like, and the research on graphene conductive concrete is quite few.
Disclosure of Invention
The invention mainly aims to provide a conductive concrete composition capable of being quickly cured and formed, and a preparation method and application thereof, so as to overcome the defects in the prior art.
In order to achieve the purpose, the technical scheme adopted by the invention comprises the following steps:
the embodiment of the invention provides a conductive concrete composition capable of being quickly cured and formed, which comprises quick-curing cement serving as a base material and conductive concrete composite slurry taking the base material as a reference, wherein the conductive concrete composite slurry comprises the following components in percentage by mass: 0.05-2% of graphene, 0.5-3% of graphene dispersant, 0-40% of conductive filler and 15-30% of water, wherein the rapid curing cement is phosphorus magnesium cement, the resistivity of the conductive concrete composition capable of being rapidly cured and formed is below 10 omega cm, and the conductive concrete composition can be cured within 30min at room temperature.
The embodiment of the invention also provides a preparation method of the conductive concrete composition capable of being quickly cured and formed, which comprises the following steps: mixing the fast curing cement, the graphene dispersant, the conductive filler and water, and stirring and dispersing to obtain the conductive concrete composition capable of being fast cured and molded.
The embodiment of the invention also provides application of any one of the conductive concrete compositions capable of being quickly cured and formed in the fields of electric heating warming or electric heating pavements and the like.
Compared with the prior art, the invention has the beneficial effects that:
1) according to the invention, the electronic transition between the graphene sheet layers is utilized to form the connection without a conducting wire in the conductive concrete body, and the conductive concrete composition with good conductivity, high mechanical strength, stable resistivity and good durability can be obtained by adopting a small mixing amount;
2) the invention adopts the fast curing water as the base material, can realize the fast curing and demoulding of the conductive concrete slurry, greatly improves the production efficiency of the conductive cement product and provides favorable conditions for large-scale production;
3) according to the invention, the graphene and the conventional conductive filler are compounded for use, so that the using amount of the graphene is reduced, the production cost is saved, the relation between the performance and the cost is balanced, and the market competitiveness is improved;
4) the invention provides a conductive concrete composition capable of being rapidly cured and formed and a preparation method thereof, which is characterized in that graphene and other conductive substances are mixed, and a graphene dispersing agent is combined to be efficiently dispersed into rapidly-cured cement, so that the high conductivity of the graphene, the synergistic effect among conductive substances in different forms and the rapid formability of the rapidly-cured cement are fully utilized, the resistivity of a concrete material is obviously improved, the conductive concrete composition has the advantages of rapid mass production, good conductivity, high mechanical strength, stable resistivity and good durability, the conductivity of a matrix material is improved (the resistivity can reach 10 omega cm), the forming process is accelerated (the curing can be carried out at room temperature within 30 min), the conductive concrete composition is a novel high-performance conductive concrete material capable of being rapidly industrialized, and has obvious innovation significance and engineering practical value, and can be widely applied to electric heating and heating, The electric heating pavement and other fields have very wide market prospect;
5) the concrete product prepared from the conductive concrete composition capable of being quickly cured and molded has moderate cost, good conductivity, high mechanical strength, stable resistivity and good durability, can be quickly cured and molded, and is convenient for large-scale production.
Detailed Description
In view of the deficiencies in the prior art, the inventors of the present invention have made extensive studies and extensive practices to provide technical solutions of the present invention. The technical solution, its implementation and principles, etc. will be further explained as follows.
One aspect of the embodiments of the present invention provides a conductive concrete composition capable of being rapidly cured and formed, which includes a rapid-curing cement as a base material, and a conductive concrete composite slurry based on the base material, where the conductive concrete composite slurry includes the following components, calculated by mass: 0.05-2% of graphene, 0.5-3% of graphene dispersant, 0-40% of conductive filler and 15-30% of water, wherein the rapid curing cement is phosphorus magnesium cement, the resistivity of the conductive concrete composition capable of being rapidly cured and formed is below 10 omega cm, and the conductive concrete composition can be cured within 30min at room temperature.
Furthermore, the invention uses the fast-curing cement as a base material, and adds a conductive phase which takes graphene as a main component to form the conductive concrete composite slurry which can be rapidly formed.
In some preferred embodiments, the graphene comprises few layers of redox graphene.
Wherein the parameters of the graphene are as follows: the purity is more than 95 wt%, the thickness is 1.0-1.77 nm, the diameter of a lamella is 10-50 mu m, the number of layers is 1-5, and the specific surface area is 360-450 m2(ii) in terms of/g. According to the invention, the conductive filler mainly comprising graphene is added, so that higher conductivity can be obtained at a lower addition amount, and the purpose of not damaging the mechanical property of a concrete product is achieved.
In some preferred embodiments, the graphene dispersant includes any one or a combination of two or more of sodium dodecylbenzene sulfonate, sodium dodecylsulfonate, N-methyl pyrrole, sodium lignosulfonate, pyrenyl acid, pyrenesulfonic acid, peryleneic acid, aniline trimer, aniline tetramer, polyvinylpyrrolidone, and the like. The graphene dispersing agent is good in dispersing effect and high in stability. The prepared graphene dispersion slurry is semisolid or solid blocky particles.
In some preferred embodiments, the conductive filler includes carbon materials such as carbon black, graphite, carbon fiber, carbon nanotube, or any one or a combination of two or more of copper powder, aluminum powder, and steel fiber.
Further, the other conductive fillers are graphite, the carbon content is more than 99%, and the fineness is 500-8000 meshes.
Further, the other conductive filler is carbon black, the carbon content is more than 99%, and the fineness is 20-200 nm.
Furthermore, the other conductive fillers are carbon fibers, the diameter is 5-20 μm, and the length is 3-30 mm.
Further, the other conductive fillers are steel fibers, and the length of the other conductive fillers is 5-30 mm.
Furthermore, the rapid curing cement is phosphorus-magnesium cement, the initial setting time of the rapid curing cement is 5-30 min, the early strength (3 h for solidification) is greater than 30MPa, and the later strength (7 days for solidification) is greater than 50 MPa.
Another aspect of the embodiments of the present invention provides a method for preparing a conductive concrete composition capable of being rapidly cured and formed, including: mixing the fast curing cement, the graphene dispersant, the conductive filler and water, and stirring and dispersing to obtain the conductive concrete composition capable of being fast cured and molded.
Further, the preparation process of the conductive concrete composite material for rapid curing and forming comprises the following steps:
firstly, adding the fast-curing cement powder into a high-speed stirrer, starting stirring, then adding the semisolid dispersed graphene slurry and other conductive fillers, stirring at a high speed for dispersing for 15-20 min, and stirring at a low speed for 2-3 min to prepare the conductive concrete composite capable of being fast cured and molded.
And secondly, on the basis of the conductive concrete composite material prepared in the first step, adding water and a small amount of water reducing agent to prepare conductive concrete slurry, pouring the slurry into a mold, and embedding the stainless steel wire mesh electrode.
And thirdly, placing the sample prepared in the second step at room temperature for 1 hour, and then demolding, wherein the initial strength reaches 16.5MPa, and special curing is not needed in the later period, and the sample is cured at room temperature.
Another aspect of the embodiments of the present invention provides a use of the conductive concrete composition capable of being rapidly cured and formed in the fields of electric heating or electric heating pavements, etc.
In conclusion, the conductive concrete composition has the advantages of rapid mass production of concrete products with good conductivity, high mechanical strength, stable resistivity and good durability, improves the conductivity of the matrix material (the resistivity can reach 10 omega cm), accelerates the molding process (room temperature curing within 30 min), and can be widely applied to the fields of electric heating, electric heating pavements and the like. The concrete product prepared by the composition has moderate cost, good conductivity, high mechanical strength, stable resistivity and good durability, can be quickly cured and molded, and is convenient for large-scale production.
The present invention is further illustrated by the following examples, but it should not be construed that the scope of the above-described subject matter is limited to the following examples. Various substitutions and alterations can be made without departing from the technical idea of the invention and the scope of the invention is covered by the present invention according to the common technical knowledge and the conventional means in the field.
Example 1
The composition of the conductive concrete composition capable of being rapidly cured and molded in the embodiment is as follows:
phosphorus-magnesium cement: 100 portions, the 3-day compressive strength is 48.1MPa, and the 3-day flexural strength is 7.1 MPa.
Graphene: 0.05 part.
Graphene dispersant: 0.5 portion
Conductive filler: graphite (5 parts), carbon fiber (1 part) and carbon black (24 parts).
Mixing water: 25 parts of Ningbo city tap water.
The preparation steps are as follows:
and adding the fast-curing cement powder into a high-speed stirrer, starting stirring, adding the semi-solid dispersed graphene slurry and the conductive filler, stirring at a high speed for dispersing for 15-20 min, and stirring at a low speed for 2-3 min to obtain the conductive concrete composite capable of being fast cured.
And (2) taking the prepared conductive concrete composite material as a base, adding water and a small amount of water reducing agent to prepare conductive concrete slurry, pouring the slurry into a mold, simultaneously embedding a stainless steel wire mesh electrode, standing the sample at room temperature for 1h, and then demolding.
Example 2
The composition of the conductive concrete composition capable of being rapidly cured and molded in the embodiment is as follows:
phosphorus-magnesium cement: 100 portions, the 3-day compressive strength is 48.1MPa, and the 3-day flexural strength is 7.1 MPa.
Graphene: 0.5 part.
Graphene dispersant: 1 part of
Conductive filler: graphite (15 parts), carbon fiber (1 part) and carbon black (14 parts).
Mixing water: 25 parts of Ningbo city tap water.
The preparation steps are as follows:
adding the fast-curing cement powder into a high-speed stirrer, starting stirring, adding the semi-solid dispersed graphene slurry and the conductive filler, stirring at a high speed for dispersing for 15-20 min, and stirring at a low speed for 2-3 min to obtain the conductive concrete composite material capable of being fast cured and formed
And (2) taking the prepared conductive concrete composite material as a base, adding water and a small amount of water reducing agent to prepare conductive concrete slurry, pouring the slurry into a mold, simultaneously embedding a stainless steel wire mesh electrode, standing the sample at room temperature for 1h, and then demolding.
Example 3
The composition of the conductive concrete composition capable of being rapidly cured and molded in the embodiment is as follows:
phosphorus-magnesium cement: 100 portions, the 3-day compressive strength is 48.1MPa, and the 3-day flexural strength is 7.1 MPa.
Graphene: 1 part.
Graphene dispersant: 1.5 parts of
Conductive filler: graphite (20 parts), steel fiber (1 part) and carbon black (9 parts).
Mixing water: 25 parts of Ningbo city tap water.
The preparation steps are as follows:
and adding the fast-curing cement powder into a high-speed stirrer, starting stirring, adding the semi-solid dispersed graphene slurry and the conductive filler, stirring at a high speed for dispersing for 15-20 min, and stirring at a low speed for 2-3 min to obtain the conductive concrete composite capable of being fast cured and molded.
And (2) taking the prepared conductive concrete composite material as a base, adding water and a small amount of water reducing agent to prepare conductive concrete slurry, pouring the slurry into a mold, simultaneously embedding a stainless steel wire mesh electrode, standing the sample at room temperature for 1h, and then demolding.
Example 4
The composition of the conductive concrete composition capable of being rapidly cured and molded in the embodiment is as follows:
phosphorus-magnesium cement: 100 portions, the 3-day compressive strength is 48.1MPa, and the 3-day flexural strength is 7.1 MPa.
Graphene: and 2 parts.
Graphene dispersant: and 3 parts.
Conductive filler: graphite (25 parts), steel fiber (1 part), carbon black (4 parts).
Mixing water: 25 parts of Ningbo city tap water.
The preparation steps are as follows:
and adding the fast-curing cement powder into a high-speed stirrer, starting stirring, adding the semi-solid dispersed graphene slurry and the conductive filler, stirring at a high speed for dispersing for 15-20 min, and stirring at a low speed for 2-3 min to obtain the conductive concrete composite capable of being fast cured and molded.
And (2) taking the prepared conductive concrete composite material as a base, adding water and a small amount of water reducing agent to prepare conductive concrete slurry, pouring the slurry into a mold, simultaneously embedding a stainless steel wire mesh electrode, standing the sample at room temperature for 1h, and then demolding.
Comparative example 1: essentially the same as example 3, except that: ordinary cement is used. The data results are shown in the following table:
by the results of examples 1-4 and comparative example 1 of the present invention, the conductive concrete composition of the present invention has the advantages of rapid mass production of concrete products with good conductivity, high mechanical strength, stable resistivity and good durability, not only improves the conductivity of the matrix material (the resistivity can reach 10 Ω · cm), but also accelerates the molding process (room temperature curing within 30 min), and can be widely applied to the fields of electric heating, electric heating pavement and the like.
The aspects, embodiments, features and examples of the present invention should be considered as illustrative in all respects and not intended to be limiting of the invention, the scope of which is defined only by the claims. Other embodiments, modifications, and uses will be apparent to those skilled in the art without departing from the spirit and scope of the claimed invention.
The use of headings and chapters in this disclosure is not meant to limit the disclosure; each section may apply to any aspect, embodiment, or feature of the disclosure.
Throughout this specification, where a composition is described as having, containing, or comprising specific components or where a process is described as having, containing, or comprising specific process steps, it is contemplated that the composition of the present teachings also consist essentially of, or consist of, the recited components, and the process of the present teachings also consist essentially of, or consist of, the recited process steps.
It should be understood that the order of steps or the order in which particular actions are performed is not critical, so long as the teachings of the invention remain operable. Further, two or more steps or actions may be performed simultaneously.
In addition, the inventors of the present invention have also made experiments with other materials, process operations, and process conditions described in the present specification with reference to the above examples 1 to 4, and have obtained preferable results.
While the invention has been described with reference to illustrative embodiments, it will be understood by those skilled in the art that various other changes, omissions and/or additions may be made and substantial equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from its scope. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed for carrying out this invention, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. The conductive concrete composition capable of being rapidly cured and formed is characterized by comprising rapid-curing cement serving as a base material and a conductive concrete composite slurry based on the base material, wherein the conductive concrete composite slurry comprises the following components in percentage by mass: 0.05-2% of graphene, 0.5-3% of graphene dispersant, 0-40% of conductive filler and 15-30% of water, wherein the rapid curing cement is phosphorus magnesium cement, the resistivity of the conductive concrete composition capable of being rapidly cured and formed is below 10 omega cm, and the conductive concrete composition can be cured within 30min at room temperature.
2. The rapidly curable electrically conductive concrete composition according to claim 1, wherein: the graphene comprises a few layers of redox graphene.
3. The rapidly curable electrically conductive concrete composition according to claim 2, wherein: the graphene has the purity of more than 95 wt%, the thickness of 1.0-1.77 nm, the sheet diameter of 10-50 mu m, the number of layers of 1-5 and the specific surface area of 360-450 m2/g。
4. The rapidly curable electrically conductive concrete composition according to claim 1, wherein: the graphene dispersing agent comprises any one or a combination of more than two of sodium dodecyl benzene sulfonate, sodium dodecyl sulfonate, N-methylpyrrole, sodium lignosulfonate, pyrenyl acid, pyrenesulfonic acid, perylene acid, aniline trimer, aniline tetramer and polyvinylpyrrolidone.
5. The rapidly curable electrically conductive concrete composition according to claim 1, wherein: the conductive filler comprises any one or a combination of more than two of carbon black, graphite, carbon fiber, carbon nano tube and metal material.
6. The conductive concrete composition capable of being rapidly cured and formed according to claim 5, wherein: the metal material comprises any one or the combination of more than two of copper powder, aluminum powder and steel fiber.
7. The conductive concrete composition capable of being rapidly cured and formed according to claim 6, wherein: the carbon content of the graphite is more than 99 wt%, and the fineness of the graphite is 500-8000 meshes; and/or the carbon content of the carbon black is more than 99 wt%, and the fineness is 20-200 nm; and/or the diameter of the carbon fiber is 5-20 μm, and the length of the carbon fiber is 3-30 mm; and/or the length of the steel fiber is 5-30 mm.
8. The rapidly curable electrically conductive concrete composition according to claim 1, wherein: the initial setting time of the phosphorus-magnesium cement is 5-30 min, the strength of the phosphorus-magnesium cement is greater than 30MPa after 3h solidification, and the strength of the phosphorus-magnesium cement is greater than 50MPa after 7 days solidification.
9. The method for preparing a rapidly curable electrically conductive concrete composition according to any one of claims 1 to 8, comprising: mixing the fast curing cement, the graphene dispersant, the conductive filler and water, and stirring and dispersing to obtain the conductive concrete composition capable of being fast cured and molded.
10. Use of the rapidly curable electrically conductive concrete composition of any one of claims 1 to 8 in the field of electric heating or electric heating of road surfaces.
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| CN113264730A (en) * | 2021-05-24 | 2021-08-17 | 盐城工学院 | Graphene-cement-based conductive composite material and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113264730A (en) * | 2021-05-24 | 2021-08-17 | 盐城工学院 | Graphene-cement-based conductive composite material and preparation method thereof |
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