CN109626908A - A kind of cement-base composite material and preparation method thereof of conduction superelevation ductility - Google Patents

A kind of cement-base composite material and preparation method thereof of conduction superelevation ductility Download PDF

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Publication number
CN109626908A
CN109626908A CN201910026479.9A CN201910026479A CN109626908A CN 109626908 A CN109626908 A CN 109626908A CN 201910026479 A CN201910026479 A CN 201910026479A CN 109626908 A CN109626908 A CN 109626908A
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cement
conductive
composite material
base composite
wet
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潘金龙
蔡景明
姜波
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Nanjing Picas Architectural Technology Co Ltd
Southeast University
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Nanjing Picas Architectural Technology Co Ltd
Southeast University
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Priority to CN201910026479.9A priority Critical patent/CN109626908A/en
Publication of CN109626908A publication Critical patent/CN109626908A/en
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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
    • 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
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/34—Non-shrinking or non-cracking materials
    • C04B2111/343—Crack resistant materials
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • 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
    • 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)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Road Paving Structures (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The invention discloses a kind of cement-base composite materials and preparation method thereof of conductive superelevation ductility, the cement-base composite material includes following components according to parts by weight: 40~45 parts of cement, 15~20 parts of flyash, 10~15 parts of quartz sand, 3~5 parts of conductive nano carbon dust, further includes the carbon fiber according to the polyethylene fiber peacekeeping volume volume 0.5%~1% of volume volume 1.5%~2%.Preparation method is as follows: 1) proportionally weighing each raw material；2) by cement, flyash, quartz sand and conductive nano carbon dust is dry mixes conjunction, water-wet is added later and stirs to form cement matrix；3) carbon fiber is added into cement matrix and polyethylene fibre stirs evenly, obtain the cement-base composite material of the conductive superelevation ductility after casting, demoulding maintenance later.The cement-base composite material has the conductivity and Crack Control ability of superelevation simultaneously, to be suitable for pavement snow melting deicing.

Description

A kind of cement-base composite material and preparation method thereof of conduction superelevation ductility
Technical field
The present invention relates to a kind of cement-base composite materials and preparation method thereof of conductive superelevation ductility, belong to architectural engineering skill Art field.
Background technique
In winter, the accumulated snow of urban road, highway and urban interchange, which freezes, often generates pole to communications and transportation For detrimental effect, traffic safety is seriously affected.In the method that cleaning road snow mantle freezes, traditional method is to use Artificial or mechanical physics deicing method, but generally require time and effort consuming, being not thorough of removing, efficiency are lower, and this method Itself also there is the problem of safety aspect.In addition there are chemical deicing methods, for example melt accumulated snow to road sprinkling salting liquid etc., But often heavy corrosion concrete road surface reinforcing bar so that destruction is easily degraded on road surface reduces the use on road surface to these chemical sprays Service life.
In recent years, civil engineer begins trying researching and designing conducting concrete road surface, passes through when road snow freezes Road surface conductive exothermal eliminates dissolution road snow.Usually pass through the materials such as dopand metals fiber, carbon fiber and carbon black, graphite at present Improve the conductivity of cement-based material.
Document 1 (" Y.Sherif, CY.Tuan, ACI Materials Journal, 1999,96 (3): 382-390.) it is public The conducting concrete of a kind of mixing of steel fiber in concrete and steel cuttings has been opened, can achieve good deicing mesh after being powered Mark.But in the alkaline environment of concrete, steel fibre and steel cuttings surface can generate oxidative deactivation layer, lead steel fiber reinforced concrete Electrical property reduces, and as time went on, the resistivity of steel fibre steel cuttings concrete obviously increases.
2 (" Han Baoguo of document；Wang Yunyang；Zhang Liqing etc.；It is conducting cement-based to meet material and its preparation method and application；It is public The number of opening: CN105067164A ") a kind of conductive cement base material prepared based on carbon nanotube and nano carbon black is disclosed, have High sensitivity and the small feature of static resistance rate.But cement base is a kind of quasi-brittle material, fracture width is often larger, in reality Once cracking will be so that conductive network turns off in the application process of border, the characteristics of cement-based material brittleness, has seriously affected cement The conductive characteristic of sill.
(" G.Faneca, I.Segura, JM.Torrents et al, Cement the and Concrete of document 3 Composites, 2018,92:135-144. ") a kind of method using Carbon Fiber Reinforced Cement-based Composites conductivity is disclosed, The result shows that carbon fiber can significantly improve the electric conductivity of cement-based material, there is better long durability compared to steel fibre. But the cement-based material for only adding carbon fiber still has the characteristics that major fracture cracking, reduces cement-based material electric conductivity Duration and stability.
Summary of the invention
Technical problem: the present invention provides a kind of cement-base composite materials and preparation method thereof of conductive superelevation ductility, should Cement-base composite material has the conductivity and Crack Control ability of superelevation simultaneously, thus have stronger heating power ability and Continual and steady conductive network connection reliability；By adding conductive nano carbon dust, carbon fiber and poly- second in cement-based material Alkene fiber increases substantially the conductivity and Crack Control ability of cement-based material, it is ensured that forms stabilization inside cement matrix and holds Continuous conductive network, to be suitable for pavement snow melting deicing.
Technical solution: the present invention provides a kind of cement-base composite material of conductive superelevation ductility, the cement base is compound Material includes following components according to parts by weight:
It further include the carbon fiber according to the polyethylene fiber peacekeeping volume volume 0.5%~1% of volume volume 1.5%~2%.
Wherein:
The cement be ordinary portland cement or composite Portland cement, 28 days compression strength >=52.5MPa, 28 days flexural strength >=7.0MPa, specific surface area >=300m2/kg。
The flyash is level-one flyash, specific surface area >=700m2/ kg, density 2.6g/cm3。
The quartz sand is superfine quartz sand, and specification is 70~110 mesh, and partial size is 0.1~0.15mm.
For the partial size of the conductive nano carbon dust in 9~20nm, resistivity is 0.5~1.0 Ω m.
The polyethylene fibre length is 6mm~12mm, and diameter is 12~39 μm, elasticity modulus >=100GPa, the limit Tensile strength >=2500MPa, elongation at break are 2%~6%.
The carbon fiber is chopped carbon fiber, length in 3~9mm, diameter at 5~20 μm, resistivity is 0.01~ 0.1 Ω m, tensile strength are 3000~5000MPa.
The present invention also provides a kind of method of the cement-base composite material of conductive superelevation ductility, this method includes following step It is rapid:
1) each raw material is proportionally weighed；
2) by cement, flyash, quartz sand and conductive nano carbon dust is dry mixes conjunction, water-wet is added later and stirs to form cement base Body；
3) carbon fiber is added into cement matrix and polyethylene fibre stirs evenly, later after casting, demoulding maintenance Obtain the cement-base composite material of the conductive superelevation ductility.
Wherein:
It is dry described in step 2) to mix conjunction and refer to and stir 2~3min so that the revolving speed of 100r/min~140r/min is dry；Step 2) The addition water-wet is stirred to be formed in cement matrix, and the water and cement of addition are 25~30:40~45 according to weight part ratio, wet to stir Condition be 100r/min~140r/min revolving speed wet stir 5~10min.
Step 3) is described carbon fiber and polyethylene fibre is added into cement matrix to be stirred evenly that detailed process is as follows:
1. carbon fiber is first added into cement matrix, 5~10min is stirred so that the revolving speed of 100r/min~140r/min is wet, then 5~10min is stirred so that the revolving speed of 200r/min~280r/min is wet；
2. polyethylene fibre is added after, stirs 5~10min so that the revolving speed of 100r/min~140r/min is wet, then with 200r/ The revolving speed of min~280r/min is wet to stir 5~10min.
Step 3) the casting, demoulding maintenance refer to pour mold after vibration moulding, stand 12~demould afterwards for 24 hours, It is conserved 28-30 days in standard curing room later.
The utility model has the advantages that compared with prior art, present invention has the advantage that
1, the cement-base composite material of conductive superelevation ductility provided by the invention has the conductivity and Crack Control of superelevation Ability, to have stronger heating power ability and continual and steady conductive network connection reliability；
2, in the cement-base composite material of conductive superelevation ductility provided by the invention, conductive nano carbon dust and carbon fiber can be with Zero dimension and one-dimensional conductive network are formed in cement matrix, and the electric conductivity of cement material is greatly improved；
3, in the cement-base composite material of conductive superelevation ductility provided by the invention, carbon fiber and polyethylene fibre are in cement Play the role of good bridge joint in matrix, improve the ductility and durability of cement-based material, the cracking width of control critical eigenvalue prevents There is the interruption that local large fracture causes conductive network；
4, the preparation method of the cement-base composite material of conductive superelevation ductility provided by the invention, by cement-based material Middle admixture conductive nano carbon dust, carbon fiber and polyethylene fibre, increase substantially the conductivity and Crack Control of cement-based material Ability, it is ensured that steady and sustained conductive network is formed inside cement matrix, to be suitable for pavement snow melting deicing；
5, conductive superelevation ductility cement-base composite material provided by the invention can be used for highway and urban interchange The anti-skidding deicing section of the emphasis on road surface increases traffic safety.
Detailed description of the invention
Fig. 1 is the preparation method flow chart of conductive superelevation ductility cement-base composite material proposed by the present invention；
Fig. 2 is that conductive superelevation ductility cement-base composite material proposed by the present invention is uniaxially stretched stress-strain diagram；
Fig. 3 is the influence schematic diagram for adding carbon fiber and conductive nano carbon dust to cement-based material conductive network；
Fig. 4 is the energization heating curve of conductive superelevation ductility cement-base composite material.
Specific embodiment
The present invention provides a kind of cement-base composite material and preparation method thereof of conductive superelevation ductility, the cement base is compound The conductivity of cement-based material can be improved in conductive nano carbon dust and carbon fiber in material, so that cement-based material intrinsic silicon shape At conductive network, has the characteristics that heating power；Polyethylene fibre is used to improve the ductility of cement-based material, so that cement matrix Material has the characteristics that multiple cracking cracking, maintains effective connection of cement-based material conductive network.With reference to the accompanying drawing to the present invention It is described in further detail, content to better understand the invention, but the present invention is not limited to following embodiments.
Embodiment 1:
What this embodiment was used to examine prepared conductive superelevation ductility cement-base composite material is uniaxially stretched performance, presses Include following components according to parts by weight:
It further include the carbon fiber according to the polyethylene fiber peacekeeping volume volume 0.5% of volume volume 1.5%.
Cement is ordinary portland cement or composite Portland cement, and 28 days compression strength >=52.5MPa, 28 days anti- Roll over intensity >=7.0MPa, specific surface area >=300m2/kg。
Flyash is level-one flyash, specific surface area >=700m2/ kg, density 2.6g/cm3。
Quartz sand is superfine quartz sand, and specification is 70~110 mesh, and partial size is 0.1~0.15mm.
For the partial size of conductive nano carbon dust in 9~20nm, resistivity is 0.5~1.0 Ω m.
Polyethylene fibre length is 6mm~12mm, and diameter is 12~39 μm, elasticity modulus >=100GPa, ultimate tensible strength Degree >=2500MPa, elongation at break are 2%~6%.
Carbon fiber is chopped carbon fiber, and length is in 3~9mm, and for diameter at 5~20 μm, resistivity is 0.01~0.1 Ω M, tensile strength are 3000~5000MPa.
Its preparation process includes the following steps:
1) each raw material is proportionally weighed；
2) cement, flyash, quartz sand and conductive nano carbon dust are mixed in cement plaster blender, with 140r/min Revolving speed dry stir 2min；Then the water (parts by weight of water are 25 parts) measured is added, stirs 5min so that the revolving speed of 140r/min is wet, Form cement matrix；
3) carbon fiber is first added into cement matrix, stirs 5min so that the revolving speed of 140r/min is wet, then turn with 280r/min Speed is wet to stir 5min；Polyethylene fibre is added later, stirs 5min so that the revolving speed of 140r/min is wet, then stir so that the revolving speed of 280r/min is wet Then 5min takes the mold of specification, pour vibration moulding, demoulds after standing 12 hours, then conserves 28 in standard curing room It is to get the cement-base composite material for arriving conductive superelevation ductility.
Embodiment 2:
What this embodiment was used to examine prepared conductive superelevation ductility cement-base composite material is uniaxially stretched performance, presses Include following components according to parts by weight:
It further include the carbon fiber according to the polyethylene fiber peacekeeping volume volume 0.8% of volume volume 1.7%.
Cement is ordinary portland cement or composite Portland cement, and 28 days compression strength >=52.5MPa, 28 days anti- Roll over intensity >=7.0MPa, specific surface area >=300m2/kg。
Flyash is level-one flyash, specific surface area >=700m2/ kg, density 2.6g/cm3。
Quartz sand is superfine quartz sand, and specification is 70~110 mesh, and partial size is 0.1~0.15mm.
For the partial size of conductive nano carbon dust in 9~20nm, resistivity is 0.5~1.0 Ω m.
Polyethylene fibre length is 6mm~12mm, and diameter is 12~39 μm, elasticity modulus >=100GPa, ultimate tensible strength Degree >=2500MPa, elongation at break are 2%~6%.
Carbon fiber is chopped carbon fiber, and length is in 3~9mm, and for diameter at 5~20 μm, resistivity is 0.01~0.1 Ω M, tensile strength are 3000~5000MPa.
Its preparation process includes the following steps:
1) each raw material is proportionally weighed；
2) cement, flyash, quartz sand and conductive nano carbon dust are mixed in cement plaster blender, with 100r/min Revolving speed dry stir 3min；Then the water (parts by weight of water are 30 parts) measured is added, is stirred so that the revolving speed of 100r/min is wet 20min forms cement matrix；
3) carbon fiber is first added into cement matrix, stirs 10min so that the revolving speed of 100r/min is wet, then turn with 200r/min Speed is wet to stir 10min；Polyethylene fibre is added later, stirs 10min so that the revolving speed of 100r/min is wet, then wet with the revolving speed of 200r/min 10min is stirred, the mold of specification is then taken, pours vibration moulding, is demoulded after standing 24 hours, then is conserved in standard curing room 28 days to get the cement-base composite material for arriving conductive superelevation ductility.
Embodiment 3:
What this embodiment was used to examine prepared conductive superelevation ductility cement-base composite material is uniaxially stretched performance, presses Include following components according to parts by weight:
It further include the carbon fiber according to the polyethylene fiber peacekeeping volume volume 1% of volume volume 2%.
Cement is ordinary portland cement or composite Portland cement, and 28 days compression strength >=52.5MPa, 28 days anti- Roll over intensity >=7.0MPa, specific surface area >=300m2/kg。
Flyash is level-one flyash, specific surface area >=700m2/ kg, density 2.6g/cm3。
Quartz sand is superfine quartz sand, and specification is 70~110 mesh, and partial size is 0.1~0.15mm.Conductive nano carbon dust For partial size in 9~20nm, resistivity is 0.5~1.0 Ω m.
Polyethylene fibre length is 6mm~12mm, and diameter is 12~39 μm, elasticity modulus >=100GPa, ultimate tensible strength Degree >=2500MPa, elongation at break are 2%~6%.
Carbon fiber is chopped carbon fiber, and length is in 3~9mm, and for diameter at 5~20 μm, resistivity is 0.01~0.1 Ω M, tensile strength are 3000~5000MPa.
Its preparation process includes the following steps:
1) each raw material is proportionally weighed；
2) cement, flyash, quartz sand and conductive nano carbon dust are mixed in cement plaster blender, with 120r/min Revolving speed dry stir 2.5min；Then the water (parts by weight of water are 25 parts) measured is added, is stirred so that the revolving speed of 120r/min is wet 7min forms cement matrix；
3) carbon fiber is first added into cement matrix, stirs 7min so that the revolving speed of 120r/min is wet, then turn with 260r/min Speed is wet to stir 7min；Polyethylene fibre is added later, stirs 7min so that the revolving speed of 120r/min is wet, then stir so that the revolving speed of 260r/min is wet Then 7min takes the mold of specification, pour vibration moulding, demoulds after standing 16 hours, then conserves 28 in standard curing room It is to get the cement-base composite material for arriving conductive superelevation ductility.
It is compound in the omnipotent cement base for being uniaxially stretched the conductive superelevation ductility on machine to the preparation of embodiment 1, example 2 and example 3 of MTS Material carries out being uniaxially stretched performance test, as a result as shown in Figure 2.It can be seen from the figure that after starting load, the reading of force snesor Number increases sharply and strains, and increases more slowly.When load increases to about 2kN or so, occur the first crack on test specimen, Load occurs declining by a small margin therewith, and the moderate loss at crack starts to play a role at this time, improves the bearing capacity in section, So that fracture width is gradually tended to be steady rather than carries on.Such cracking model is beneficial to the conductive mesh inside cement base Network keeps connection, rather than because large fracture develops the interruption for causing conductive network suddenly.The material of all embodiment configurations Limiting strain may remain in 2% or more, be more than 200 times of normal concrete.
Embodiment 4:
This embodiment is used to examine the conductive heating function of the prepared cement-base composite material for only adding carbon fiber, According to parts by weight include following components:
40 parts of cement
15 parts of flyash
10 parts of quartz sand
It further include the carbon fiber according to the polyethylene fiber peacekeeping volume volume 0.5% of volume volume 1.5%.
Cement is ordinary portland cement or composite Portland cement, and 28 days compression strength >=52.5MPa, 28 days anti- Roll over intensity >=7.0MPa, specific surface area >=300m2/kg。
Flyash is level-one flyash, specific surface area >=700m2/ kg, density 2.6g/cm3.Quartz sand is ultra-fine stone Sand, specification are 70~110 mesh, and partial size is 0.1~0.15mm.
For the partial size of conductive nano carbon dust in 9~20nm, resistivity is 0.5~1.0 Ω m.
Polyethylene fibre length is 6mm~12mm, and diameter is 12~39 μm, elasticity modulus >=100GPa, ultimate tensible strength Degree >=2500MPa, elongation at break are 2%~6%.
Carbon fiber is chopped carbon fiber, and length is in 3~9mm, and for diameter at 5~20 μm, resistivity is 0.01~0.1 Ω M, tensile strength are 3000~5000MPa.
Its preparation process includes the following steps:
1) each raw material is proportionally weighed；
2) cement, flyash and quartz sand are mixed in cement plaster blender, is stirred so that the revolving speed of 140r/min is dry 2min；Then the water (parts by weight of water are 30 parts) measured is added, stirs 5min so that the revolving speed of 140r/min is wet, forms cement base Body；
3) carbon fiber is first added into cement matrix, stirs 5min so that the revolving speed of 140r/min is wet, then turn with 280r/min Speed is wet to stir 5min；Polyethylene fibre is added later, stirs 5min so that the revolving speed of 140r/min is wet, then stir so that the revolving speed of 280r/min is wet Then 5min takes the mold of specification, pour vibration moulding, demoulds after standing 24 hours, then conserves 28 in standard curing room It is to get the cement-base composite material for arriving conductive superelevation ductility.
Embodiment 5:
This embodiment is used to examine the prepared cement-base composite material for adding carbon fiber and conductive nano carbon dust Conduction heating function, includes following components according to parts by weight:
It further include the carbon fiber according to the polyethylene fiber peacekeeping volume volume 0.5% of volume volume 1.5%.
Cement is ordinary portland cement or composite Portland cement, and 28 days compression strength >=52.5MPa, 28 days anti- Roll over intensity >=7.0MPa, specific surface area >=300m2/kg。
Flyash is level-one flyash, specific surface area >=700m2/ kg, density 2.6g/cm3.Quartz sand is ultra-fine stone Sand, specification are 70~110 mesh, and partial size is 0.1~0.15mm.
For the partial size of conductive nano carbon dust in 9~20nm, resistivity is 0.5~1.0 Ω m.
Polyethylene fibre length is 6mm~12mm, and diameter is 12~39 μm, elasticity modulus >=100GPa, ultimate tensible strength Degree >=2500MPa, elongation at break are 2%~6%.
Carbon fiber is chopped carbon fiber, and length is in 3~9mm, and for diameter at 5~20 μm, resistivity is 0.01~0.1 Ω M, tensile strength are 3000~5000MPa.
Its preparation process includes the following steps:
1) each raw material is proportionally weighed；
2) cement, flyash, quartz sand and conductive nano carbon dust are mixed in cement plaster blender, with 140r/min Revolving speed dry stir 2min；Then the water (parts by weight of water are 30 parts) measured is added, stirs 5min so that the revolving speed of 140r/min is wet, Form cement matrix；
3) carbon fiber is first added into cement matrix, stirs 5min so that the revolving speed of 140r/min is wet, then turn with 280r/min Speed is wet to stir 5min；Polyethylene fibre is added later, stirs 5min so that the revolving speed of 140r/min is wet, then stir so that the revolving speed of 280r/min is wet Then 5min takes the mold of specification, pour vibration moulding, demoulds after standing 24 hours, then conserves 28 in standard curing room It is to get the cement-base composite material for arriving conductive superelevation ductility.
The real test that heats up is carried out to embodiment 4 and the prepared cement-base composite material of embodiment 5 respectively: in energization Before, in test specimen two ends brushing silver paste and copper sheet is wrapped up, to reduce end electricresistance effect；Then D.C. regulated power supply adjustable electric is utilized Source (HY3005F-3 type) provides 30V voltage in test specimen two ends, makes test specimen heating power；During heating, Omega heat is utilized Galvanic couple and good digital multimeter (34410A type) obtain the electric current and temperature that test specimen generates during electrified regulation.
Test result as shown in figure 4, compared to only add carbon fiber cement-base composite material, the conduction that the present invention designs Superelevation ductility cement-base composite material can rise to 50 DEG C in 20min internal surface temperature, and have stronger stability, Tentatively had the performance of winter road surface deicing.
The foregoing is merely one embodiment of the present invention, it is not all of or unique embodiment, this field is common Technical staff takes technical solution of the present invention the change on any equivalent or admixture dosage by reading description of the invention Change, is covered by the claims in the present invention.

Claims (10)

1. a kind of cement-base composite material of conduction superelevation ductility, it is characterised in that: the cement-base composite material is according to weight Number includes following components:
It further include the carbon fiber according to the polyethylene fiber peacekeeping volume volume 0.5%~1% of volume volume 1.5%~2%.
2. a kind of cement-base composite material of conductive superelevation ductility as described in claim 1, it is characterised in that: the cement For ordinary portland cement or composite Portland cement, 28 days compression strength >=52.5MPa, 28 days flexural strengths >= 7.0MPa, specific surface area >=300m2/kg；The flyash is level-one flyash, specific surface area >=700m2/ kg, density are 2.6g/cm3。
3. a kind of cement-base composite material of conductive superelevation ductility as described in claim 1, it is characterised in that: the quartz Sand is superfine quartz sand, and specification is 70~110 mesh, and partial size is 0.1~0.15mm.
4. a kind of cement-base composite material of conductive superelevation ductility as described in claim 1, it is characterised in that: the nanometer For the partial size of conductive carbon powder in 9~20nm, resistivity is 0.5~1.0 Ω m.
5. a kind of cement-base composite material of conductive superelevation ductility as described in claim 1, it is characterised in that: the poly- second Alkene fibre length is 6mm~12mm, and diameter is 12~39 μm, elasticity modulus >=100GPa, ultimate tensile strength >=2500MPa, Elongation at break is 2%~6%.
6. a kind of cement-base composite material of conductive superelevation ductility as described in claim 1, it is characterised in that: the carbon fiber Dimension is chopped carbon fiber, and length is in 3~9mm, and for diameter at 5~20 μm, resistivity is 0.01~0.1 Ω m, and tensile strength is 3000~5000MPa.
7. a kind of preparation method of the cement-base composite material of the conductive superelevation ductility as described in claim 1~6 is any, special Sign is: this method comprises the following steps:
1) each raw material is proportionally weighed；
2) by cement, flyash, quartz sand and conductive nano carbon dust is dry mixes conjunction, water-wet is added later and stirs to form cement matrix；
3) carbon fiber is added into cement matrix and polyethylene fibre stirs evenly, later after casting, demoulding maintenance to obtain the final product To the cement-base composite material of the conductive superelevation ductility.
8. a kind of preparation method of the cement-base composite material of conductive superelevation ductility as claimed in claim 7, it is characterised in that: It is dry described in step 2) to mix conjunction and refer to and stir 2~3min so that the revolving speed of 100r/min~140r/min is dry；Add described in step 2) Enter water-wet to stir to be formed in cement matrix, the water and cement of addition are 25~30:40~45 according to weight part ratio, and the wet condition stirred is The revolving speed of 100r/min~140r/min is wet to stir 5~10min.
9. a kind of preparation method of the cement-base composite material of conductive superelevation ductility as claimed in claim 7, it is characterised in that: Step 3) is described carbon fiber and polyethylene fibre is added into cement matrix to be stirred evenly that detailed process is as follows:
1. carbon fiber is first added into cement matrix, 5~10min is stirred so that the revolving speed of 100r/min~140r/min is wet, then with The revolving speed of 200r/min~280r/min is wet to stir 5~10min；
2. polyethylene fibre is added after, stirs 5~10min so that the revolving speed of 100r/min~140r/min is wet, then with 200r/min The revolving speed of~280r/min is wet to stir 5~10min.
10. a kind of preparation method of the cement-base composite material of conductive superelevation ductility as claimed in claim 7, feature exist The vibration moulding after: the step 3) casting, demoulding maintenance refer to and pour mold, stand 12~it demoulds afterwards for 24 hours, Zhi Hou Standard curing room conserves 28~30 days.
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