CN108238757A - A kind of preparation method of nanometer carbon black modified electroconductive cement - Google Patents
A kind of preparation method of nanometer carbon black modified electroconductive cement Download PDFInfo
- Publication number
- CN108238757A CN108238757A CN201611216587.5A CN201611216587A CN108238757A CN 108238757 A CN108238757 A CN 108238757A CN 201611216587 A CN201611216587 A CN 201611216587A CN 108238757 A CN108238757 A CN 108238757A
- Authority
- CN
- China
- Prior art keywords
- carbon black
- parts
- preparation
- nanometer carbon
- cement
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- C04B2111/90—Electrical properties
- C04B2111/94—Electrically conducting materials
Abstract
The invention discloses a kind of preparation methods of nanometer carbon black modified electroconductive cement, it is composed of the following components according to parts by weight, it is composed of the following components according to parts by weight, 80~95 parts of portland cement, 9~12 parts of flyash, 5~8 parts of fine stainless steel wire, 0.02~1.00 part of water-reducing agent, 2~8 parts of nano carbon black, 2~5 parts of aqueous dispersion, the nano carbon black grain size are 36~40nm, and specific surface area is 1612~1856m2/ g, resistivity are 0.2~5.6 Ω cm.Preparation method of the present invention is simple, at low cost, and the cement that the method for the present invention obtains has good electric conductivity, pressure-sensitive and durability, while has good compatibility with concrete structure.
Description
Technical field
The present invention relates to a kind of preparation methods of nanometer carbon black modified electroconductive cement.
Background technology
Concrete is the widest construction material of modern Application, with abundant raw material, cheap, simple for process, strong
The advantages that degree is high, durability is good.Ready-mixed concrete is one kind of concrete, refers to by cement, gathers materials, water and mixes as needed
The components such as the additive, the mineral admixture that enter by a certain percentage mixing plant through metering, sell after mixing and using transport vehicle
It is transported to the concrete mix of place to use at the appointed time.Because site operation has greater environmental impacts, premixing mixes
Solidifying soil receives more and more attention.Due to external loads and corrosion, the effect of the environmental conditions such as material aging and fatigue, bridge
It easily fails during being on active service with concrete structures such as building constructions, so as to threaten the security of the lives and property of people.Structure
Health monitoring technique can pass through the real-time prison to steel bar corrosion rate, water content, pH value, acceleration, stress, strain and crack
Survey the assessment realized to structural behaviour.Mainly include resistance-strain applied to the sensor of concrete structure health monitoring at present
Piece, fibre optical sensor, piezoelectric ceramics and marmem etc..However these sensors there are durability is poor, sensitivity is low, into
This height and with concrete structure compatibility it is bad the shortcomings of.
Invention content
The present invention provides a kind of preparation method of nanometer carbon black modified electroconductive cement, cement of the present invention has good lead
Electrically, pressure-sensitive and durability, while there is good compatibility with concrete structure.To reach above-mentioned technique effect, this hair
It is bright to be realized especially by following technical scheme：
A kind of preparation method of nanometer carbon black modified electroconductive cement, includes the following steps：
(1) 2~5 parts of 45~55 parts of water, aqueous dispersion stirrings 1 are sequentially added by weight in agitator for cement mortar
~2min adds in 2~8 parts of 1~2min of stirring of nano carbon black；Add in 85~98 parts of portland cement, 9~12 parts of flyash, no
Become rusty 0.02~1.00 part of 5~8 parts of steel microfilament, water-reducing agent 5~10min of stirring；
(2) step (1) obtained mixture is poured into mold；
(3) mold is put into after being conserved 15~20 days in curing box and demoulded.
Further, in the above-mentioned technical solutions, the nano carbon black grain size is 36~40nm, specific surface area for 1612~
1856m2/ g, resistivity are 0.2~5.6 Ω cm.
Further, in the above-mentioned technical solutions, the portland cement strength grade is C35 or C40.
Further, in the above-mentioned technical solutions, the specific surface of the flyash is 520~760m2/kg。
Further, in the above-mentioned technical solutions, a diameter of 7~9 μm of the fine stainless steel wire, length are 5~8mm,
Elongation percentage ＞ 3%, tensile strength are 1000~1100MPa.
Further, in the above-mentioned technical solutions, the dispersant is HPMA.
Further, in the above-mentioned technical solutions, curing box temperature is 18~22 DEG C, relative humidity is 92~94%.
Invention advantageous effect
Preparation method simple process of the present invention.Contain nano carbon black in the present invention in cement raw material, form chain type conduction knot
Structure effectively reduces the resistivity of cement；Contain fine stainless steel wire in concrete of the present invention, in use not by corrosion
It influences；Microfilament diameter is small, and effective enhancing network can be formed under low-dosage, improve Reactive Powder Concrete matrix intensity and
Toughness；Microfilament pliability is high, the application range of expansible Reactive Powder Concrete.Cement of the present invention have good electric conductivity,
Pressure-sensitive and durability, while there is good compatibility with concrete structure.Electrostatic screen, traffic detection, reinforcing bar on road surface
Corrosion monitoring, stress/strain monitoring, crack and damage monitoring etc. have wide research and application prospect.
Specific embodiment
With reference to embodiment, the invention will be further described.
Embodiment 1
A kind of preparation method of nanometer carbon black modified electroconductive cement, includes the following steps：
(1) 45 parts of water, aqueous dispersion HPMA2~5 part stirring 1 are sequentially added by weight in agitator for cement mortar
~2min adds in 2 parts of 1~2min of stirring of nano carbon black；Add in 85 parts of portland cement, 9 parts of flyash, 5 parts of fine stainless steel wire,
0.02 part of 5~10min of stirring of water-reducing agent；
(2) step (1) obtained mixture is poured into mold；
(3) mold is put into after being conserved 15 days in curing box and demoulded；Curing box temperature is 18 DEG C, relative humidity is
92%.
The nano carbon black grain size is 36~40nm, and specific surface area is 1612~1856m2/ g, resistivity are 0.2~5.6
Ω·cm。
The portland cement strength grade is C35.
The specific surface of the flyash is 520~760m2/kg。
A diameter of 7~9 μm of the fine stainless steel wire, length be 5~8mm, elongation percentage ＞ 3%, tensile strength 1000
~1100MPa.
Embodiment 2
A kind of preparation method of nanometer carbon black modified electroconductive cement, includes the following steps：
(1) sequentially added by weight in agitator for cement mortar 55 parts of water, HPMA5 parts of aqueous dispersion stirring 1~
2min adds in 8 parts of 1~2min of stirring of nano carbon black；Add in 98 parts of portland cement, 12 parts of flyash, 8 parts of fine stainless steel wire,
0.08 part of stirring 10min of water-reducing agent；
(2) step (1) obtained mixture is poured into mold；
(3) mold is put into after being conserved 20 days in curing box and demoulded；Curing box temperature is 22 DEG C, relative humidity is
94%.
The nano carbon black grain size is 36~40nm, and specific surface area is 1612~1856m2/ g, resistivity are 0.2~2.6
Ω·cm。
The portland cement strength grade is C40.
The specific surface of the flyash is 520~760m2/kg。
A diameter of 7~9 μm of the fine stainless steel wire, length be 5~8mm, elongation percentage ＞ 3%, tensile strength 1000
~1100MPa.
Embodiment 3
A kind of preparation method of nanometer carbon black modified electroconductive cement, includes the following steps：
(1) sequentially added by weight in agitator for cement mortar 50 parts of water, HPMA4 parts of aqueous dispersion stirring 1~
2min adds in 5 parts of 1~2min of stirring of nano carbon black；Add in 90 parts of portland cement, 10 parts of flyash, 6 parts of fine stainless steel wire,
0.05 part of stirring 5min of water-reducing agent；
(2) step (1) obtained mixture is poured into mold；
(3) mold is put into after being conserved 16 days in curing box and demoulded；Curing box temperature is 20 DEG C, relative humidity is
94%.
The nano carbon black grain size is 36~40nm, and specific surface area is 1612~1856m2/ g, resistivity are 0.2~5.6
Ω·cm。
The portland cement strength grade is C35.
The specific surface of the flyash is 520~760m2/kg。
A diameter of 7~9 μm of the fine stainless steel wire, length be 5~8mm, elongation percentage ＞ 3%, tensile strength 1000
~1100MPa.
The preferred embodiment of the present invention described in detail above.It should be appreciated that those of ordinary skill in the art without
Creative work is needed according to the present invention can to conceive and makes many modifications and variations.Therefore, all technologies in the art
Personnel are analysed under this invention's idea by logic minute on the basis of existing technology, reasoning or limited experiment can obtain
Technical solution, all should be in the protection domain being defined in the patent claims.
Claims (7)
1. a kind of preparation method of nanometer carbon black modified electroconductive cement, which is characterized in that include the following steps：
(1) sequentially added by weight in agitator for cement mortar 45~55 parts of water, 2~5 parts of aqueous dispersion stirring 1~
2min adds in 2~8 parts of 1~2min of stirring of nano carbon black；Add in 85~98 parts of portland cement, 9~12 parts of flyash, stainless
0.02~1.00 part of 5~8 parts of steel microfilament, water-reducing agent 5~10min of stirring；
(2) step (1) obtained mixture is poured into mold；
(3) mold is put into after being conserved 15~20 days in curing box and demoulded.
2. the preparation method of nanometer carbon black modified electroconductive cement according to claim 1, it is characterised in that：The nano carbon black
Grain size is 36~40nm, and specific surface area is 1612~1856m2/ g, resistivity are 0.2~5.6 Ω cm.
3. the preparation method of nanometer carbon black modified electroconductive cement according to claim 1, it is characterised in that：The silicate cement
Mud strength grade is C35 or C40.
4. the preparation method of nanometer carbon black modified electroconductive cement according to claim 1, it is characterised in that：The flyash
Specific surface is 520~760m2/kg。
5. the preparation method of nanometer carbon black modified electroconductive cement according to claim 1, it is characterised in that：The stainless steel is micro-
A diameter of 7~9 μm of silk, length are 5~8mm, and elongation percentage ＞ 3%, tensile strength is 1000~1100MPa.
6. the preparation method of nanometer carbon black modified electroconductive cement according to claim 1, it is characterised in that：The dispersant is
HPMA。
7. the preparation method of nanometer carbon black modified electroconductive cement according to claim 1, it is characterised in that：Curing box temperature is
18~22 DEG C, relative humidity be 92~94%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611216587.5A CN108238757A (en) | 2016-12-26 | 2016-12-26 | A kind of preparation method of nanometer carbon black modified electroconductive cement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611216587.5A CN108238757A (en) | 2016-12-26 | 2016-12-26 | A kind of preparation method of nanometer carbon black modified electroconductive cement |
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| Publication Number | Publication Date |
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| CN108238757A true CN108238757A (en) | 2018-07-03 |
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| CN201611216587.5A Pending CN108238757A (en) | 2016-12-26 | 2016-12-26 | A kind of preparation method of nanometer carbon black modified electroconductive cement |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109626908A (en) * | 2019-01-11 | 2019-04-16 | 东南大学 | A kind of cement-base composite material and preparation method thereof of conduction superelevation ductility |
| CN110803900A (en) * | 2019-11-27 | 2020-02-18 | 大连恒流储能电站有限公司 | Special concrete capable of controlling resistivity |
| CN112225510A (en) * | 2020-10-21 | 2021-01-15 | 燕山大学 | Conductive carbon black composite cement mortar and preparation method thereof |
-
2016
- 2016-12-26 CN CN201611216587.5A patent/CN108238757A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109626908A (en) * | 2019-01-11 | 2019-04-16 | 东南大学 | A kind of cement-base composite material and preparation method thereof of conduction superelevation ductility |
| CN110803900A (en) * | 2019-11-27 | 2020-02-18 | 大连恒流储能电站有限公司 | Special concrete capable of controlling resistivity |
| CN112225510A (en) * | 2020-10-21 | 2021-01-15 | 燕山大学 | Conductive carbon black composite cement mortar and preparation method thereof |
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| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180703 |
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| WD01 | Invention patent application deemed withdrawn after publication |