CN101269940A - Method for preparing conductive fiber reinforced concrete base functional composite material - Google Patents
Method for preparing conductive fiber reinforced concrete base functional composite material Download PDFInfo
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- CN101269940A CN101269940A CNA2008100645010A CN200810064501A CN101269940A CN 101269940 A CN101269940 A CN 101269940A CN A2008100645010 A CNA2008100645010 A CN A2008100645010A CN 200810064501 A CN200810064501 A CN 200810064501A CN 101269940 A CN101269940 A CN 101269940A
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Abstract
The present invention relates to a method for producing conductive-fiber cement-function-improved composite material, which resolves the problems of the prior art that the produced conductive-fiber cement-function-improved composite material has unfavorable disperse effect of the fiber, the fiber is easy to break, the electric conductivity is low and the function is poor. The preparation method comprises the steps: firstly, preparing the conductive fiber dispersion phase solution; secondly, preparing the cement pulp substrate; thirdly, adding the conductive fiber dispersion phase solution into the cement pulp substrate; fourthly, repeating the step two and the step three, and a billet with cement substrate being distributed with the conductive fiber at intervals is obtained, and the cement pulp substrate is poured on the upper surface of the billet; fifthly, after the poured cement pulp substrate is solidified, the die is removed, and the conductive-fiber cement-function-improved composite material can be obtained after the maintenance. The disperse effect of the fiber is good, and the fiber is free from being broken, and the conductivity is good, and the function of the material is favorable.
Description
Technical field
The present invention relates to a kind of preparation method of cement based functional composite material.
Background technology
The kind of fiber conductive component in the electro-conductive fiber cement based functional composite material, character, shape, size, volume, with the consistency of cement matrix and both factors such as complex method, the capital influences the conductive characteristic of fibrocement base functional composite material, and micron conductor fibers is often tiny because of monofilament, specific surface area takes place to twine greatly and reunites, so the scattering problem of electro-conductive fiber is a difficult problem that perplexs fibrocement base functional composite material performance study always.At present, utilize physics ball milling, shearing mechanism stirring, sonic oscillation, acid or treatment processs such as alkali oxidative modification, tensio-active agent, make fiber in cement slurry, obtain good dispersion even certain arranging, but there are the fiber dispersion poor effect in these methods, can make that fiber is cataclasm, conductivity reduces, and high conductivity only reaches 1.15 * 10
-2S/cm, and the shortcoming of functional difference.
Summary of the invention
The present invention seeks to for the electro-conductive fiber cement based functional composite material fiber dispersion poor effect that solves prior art for preparing, can make that fiber is cataclasm, specific conductivity is low and the problem of functional difference, and a kind of preparation method of conductive fiber reinforced concrete base functional composite material is provided.
A kind of preparation method of conductive fiber reinforced concrete base functional composite material realizes according to the following steps: one, the electro-conductive fiber dispersion agent is dissolved in the volatile organic solvent, mass concentration is 0.1～10% solution, in solution, add electro-conductive fiber then, supersound process 10～180min after the magnetic agitation gets the electro-conductive fiber disperse phase liquid; Two, deionized water, superplasticizer, hardening accelerator, polymer emulsion, mineral admixture and cement mixing machinery are stirred evenly after, pack into the insulation die trial in, through levelling, jolt ramming, be prepared into the cement slurry matrix; Three, after the initial set of cement slurry matrix before the final set, to wherein adding the electro-conductive fiber disperse phase liquid, and the electro-conductive fiber disperse phase liquid applied direct current or alternating-electric field 1～3h, treat after the electro-conductive fiber disperse phase liquid drying the composite body of cement matrix and electro-conductive fiber; Four, repeating step two and 3 3～15 times obtain the base substrate that cement matrix and electro-conductive fiber are intervally arranged, and at upper surface casting cement slurry matrix; Five, after cement slurry matrix to be cast solidified 24h, form removal moved in the standard curing room maintenance predetermined length of time with test specimen, the conductive fiber reinforced concrete functional composite material; Wherein the mass ratio of electro-conductive fiber and electro-conductive fiber dispersion agent is 1: 0.1～10 in the step 1; The mass ratio of deionized water and cement is 0.30～0.80: 1 in the step 2, the mass ratio of superplasticizer and cement is 0.005～0.015: 1, the mass ratio of hardening accelerator and cement is 0～0.005: 1, the mass ratio of polymer emulsion and cement is 0.05～0.20: 1, and the mass ratio of mineral admixture and cement is 0.05～0.15: 1; The mass ratio of electro-conductive fiber and cement is 1: 20～200 in the step 3.
The tensio-active agent ultra-sonic dispersion makes electro-conductive fiber obtain disperseing and arranging among the present invention, the electric field that applies makes the fiber galvanic couple polarization that has than high length-diameter ratio, become electric dipole, be subjected to electrical forces effect generation rule motion and gradually trend towards arranging along the electric field line direction in the electro-conductive fiber disperse phase liquid, fiber dispersion is effective and can be not cataclasm; The mutual bridging overlap joint of electro-conductive fiber forms the conduction networking along electric field line, and the matrix material conductive performance is strengthened, and conducts electricity very well, and can reach 5.1 * 10 along the specific conductivity that applies the electric field line direction
-2S/cm has improved 4.5 times; Because the fiber of netted pilotaxitic texture makes cement matrix have bigger relative deformation resistance on recoverable deformation process median surface, the adding of polymer emulsion makes cement matrix self to vibration the hysteresis damping effect be arranged, conductive fiber reinforced concrete functional composite material resonance damping value along the electric field line direction is 0.0696, resonance damping value 0.055 than existing fiber reinforced cement-based composite material, improved 26.5%, the electric property of gained material, vibration damping driving force performance all have greatly improved, and material function is good.
Description of drawings
Fig. 1 is the stereoscan photograph figure of two cement matrix interlayer carbon fiber layers on the cement based conductive composite material section that the auxiliary carbon fiber of gained electric field disperses to arrange in the embodiment ten.
Embodiment
Embodiment one: the preparation method of a kind of conductive fiber reinforced concrete base functional composite material of present embodiment realizes according to the following steps: one, the electro-conductive fiber dispersion agent is dissolved in the volatile organic solvent, mass concentration is 0.1～10% solution, in solution, add electro-conductive fiber then, supersound process 10～180min after the magnetic agitation gets the electro-conductive fiber disperse phase liquid; Two, deionized water, superplasticizer, hardening accelerator, polymer emulsion, mineral admixture and cement mixing machinery are stirred evenly after, pack into the insulation die trial in, through levelling, jolt ramming, be prepared into the cement slurry matrix; Three, after the initial set of cement slurry matrix before the final set, to wherein adding the electro-conductive fiber disperse phase liquid, and the electro-conductive fiber disperse phase liquid applied direct current or alternating-electric field 1～3h, treat after the electro-conductive fiber disperse phase liquid drying the composite body of cement matrix and electro-conductive fiber; Four, repeating step two and 3 3～15 times obtain the base substrate that cement matrix and electro-conductive fiber are intervally arranged, and at upper surface casting cement slurry matrix; Five, after cement slurry matrix to be cast solidified 24h, form removal moved in the standard curing room maintenance predetermined length of time with test specimen, the conductive fiber reinforced concrete functional composite material; Wherein the mass ratio of electro-conductive fiber and electro-conductive fiber dispersion agent is 1: 0.1～10 in the step 1; The mass ratio of deionized water and cement is 0.30～0.80: 1 in the step 2, the mass ratio of superplasticizer and cement is 0.005～0.015: 1, the mass ratio of hardening accelerator and cement is 0～0.005: 1, the mass ratio of polymer emulsion and cement is 0.05～0.20: 1, and the mass ratio of mineral admixture and cement is 0.05～0.15: 1; The mass ratio of electro-conductive fiber and cement is 1: 20～200 in the step 3.
Embodiment two: present embodiment and embodiment one are different is that electro-conductive fiber is aluminize one or more the mixing in fiber, conductive-nano-fibers, the CNT (carbon nano-tube) of carbon fiber, conduction silver plated fiber, conduction in the step 1.Other step and parameter are identical with embodiment one.
Embodiment three: present embodiment and embodiment one are different is that the electro-conductive fiber dispersion agent is one or more mixing in methylcellulose gum, carboxymethyl cellulose, carboxyethyl cellulose, polyoxyethylene nonylphenol ether, gum arabic, Sodium dodecylbenzene sulfonate, sodium polyacrylate, the cetyl trimethylammonium bromide in the step 1.Other step and parameter are identical with embodiment one.
Embodiment four: what present embodiment and embodiment one were different is that volatile organic solvent is dehydrated alcohol, Virahol, acetone, chloroform, ethyl acetate or perhydronaphthalene in the step 1.Other step and parameter are identical with embodiment one.
Embodiment five: present embodiment and embodiment one are different is that superplasticizer is one or more mixing in naphthalene sulfonic salt formaldehyde condensation products series high-efficiency water-reducing agent, sulfonated melamine compound resin series high-efficiency water-reducing agent, the carboxylic acid polyetherester block copolymer series high-efficiency water-reducing agent in the step 2.Other step and parameter are identical with embodiment one.
Embodiment six: present embodiment and embodiment one are different is that hardening accelerator in the step 2 is trolamine type hardening accelerator, tri-isopropanolamine type hardening accelerator, villaumite hardening accelerator or sodium sulfate complex accelerator.Other step and parameter are identical with embodiment one.
Embodiment seven: present embodiment and embodiment one are different is that polymer emulsion is one or more mixing in carboxyl styrene-butadiene emulsion, polyvinyl acetate emulsion, the interpolymer latex of polystyrene and acrylic ester in the step 2.Other step and parameter are identical with embodiment one.
Embodiment eight: present embodiment and embodiment one are different is that mineral admixture is one or more mixing in silicon ash, flyash, zeolite powder, the silica powder in the step 2.Other step and parameter are identical with embodiment one.
Embodiment nine: present embodiment and embodiment one are different is that to apply DC electric field or the voltage that electric field is 5～60V in the step 3 be 10～380V, and frequency is the alternating-electric field of 50Hz～100kHz.Other step and parameter are identical with embodiment one.
Embodiment ten: the preparation method of present embodiment conductive fiber reinforced concrete base functional composite material realizes according to the following steps:
A, preparation carbon fiber disperse phase liquid
Take by weighing 0.5g methylcellulose gum (MC), add in 30mL acetone (ACE) organic solvent stirring and dissolving; Take by weighing PAN-based carbon fiber (CF) 0.4g of diameter 7 μ m, length 3mm, quality purity 98%, slowly add in the MC/ACE solution, carry out magnetic agitation, supersound process 10min, form the CF disperse phase liquid, be added in three batches on the corresponding cement matrix, and before adding, corresponding C F dispersion liquid is supersound process 5min more at every turn.
The preparation of b, cement matrix
Take by weighing 1.0g naphthalene sulfonic salt formaldehyde condensation products series high-efficiency water-reducing agent, 0.1g trolamine, measure the 5mL carboxylic styrene butadiene latex, the deionized water for stirring that adds 40mL is dissolved fully, is divided into quarter; Take by weighing 8g silicon ash, the dry mixing of 80g cement is even, is divided into quarter; Portion in the solution is mixed in mortar with the portion of dry mixing material, after machinery stirs evenly, the slurry interpolated interval of packing into is 10mm copper mesh counter electrode, is of a size of levelling, jolt ramming in the insulation die trial of 40 * 20 * 20mm, preparation cement slurry matrix.
C, electric field are induced CF to disperse and are arranged
After the initial set of cement slurry matrix, add the CF disperse phase liquid on the matrix before the final set, apply the DC electric field of 50V, continue to change into behind the 5min-electric field of 50V, carry out the electric field action of 30min according to this, CF move in suspension and the edge applies direction of an electric field and arranges; Between two electrodes, stay the CF layer of oriented alignment after the solvent evaporates drying.
Repeating step b and c three times, and at the superiors' casting cement slurry matrix again, wait cement matrix to solidify 24h after form removal move to maintenance in the standard curing room, promptly get the conductive fiber reinforced concrete functional composite material.
Present embodiment gained conductive fiber reinforced concrete functional composite material is compared with the conductive fiber reinforced concrete base matrix material test specimen that adopts corresponding simple blend method preparation, can reach 5.1 * 10 along the specific conductivity that applies the electric field line direction
-2S/cm has improved 4.5 times; As seen from Figure 1, common reunion kink does not appear in carbon fiber, and directional profile is better, and overlapping machine can be a lot of mutually, thereby the carbon fiber reinforced cement based conductive composite material shows transmissibility preferably on macroscopic view.
Embodiment 11: the preparation method of present embodiment conductive fiber reinforced concrete base functional composite material realizes according to the following steps:
A, preparation of nano carbon pipe disperse phase liquid
Take by weighing 4.0g cetyl trimethylammonium bromide (CTAB), add in 80mL dehydrated alcohol (ETH) organic solvent stirring and dissolving; Taking by weighing average caliber is 20～40nm, length 5～15 μ m, quality purity are 90% CNT (carbon nano-tube) (MWNT) 2.0g, slowly add in the CTAB/ETH solution, the magnetic agitation of carrying out, supersound process 30min, form the MWNT disperse phase liquid, be added in three batches on the corresponding cement matrix, and before adding, corresponding M WNT dispersion liquid is supersound process 10min more at every turn.
The preparation of b, cement matrix
Take by weighing 3.0g naphthalene sulfonic salt formaldehyde condensation products series high-efficiency water-reducing agent, 0.4g trolamine, measure the 15mL interpolymer latex of polystyrene and acrylic ester, the deionized water for stirring that adds 100mL is dissolved fully, is divided into quarter; Take by weighing 20g silicon ash, the dry mixing of 200g cement is even, is divided into quarter; Portion in the solution is mixed in mortar with the portion of dry mixing material, after machinery stirs evenly, slurry poured into levelling, jolt ramming in the insulation die trial that is of a size of 220 * 20 * 20mm, preparation cement slurry matrix.
C, electric field are induced MWNT to disperse and are arranged
After the cement slurry initial set, add the MWNT disperse phase liquid on the matrix before the final set, insert a pair of copper coin electrode in the inboard, two ends, apply the alternating-electric field of 50Hz, 380V, continue 60min, MWNT moves in suspension and arranges along applying direction of an electric field; Between two electrodes, stay the MWNT layer of oriented alignment after the solvent evaporates drying.
Repeating step b and c three times, and at the superiors' casting cement slurry matrix again, wait the superiors' cement matrix to solidify 24h after form removal move to maintenance in the standard curing room, promptly get the conductive fiber reinforced concrete functional composite material.
The resonance damping value of present embodiment gained conductive fiber reinforced concrete functional composite material is 0.0696, with the resonance damping value 0.055 of the CNT (carbon nano-tube) refinforced cement based composites that adopts corresponding simple blend method preparation, compares and has improved 26.5%.
Claims (9)
1, a kind of preparation method of conductive fiber reinforced concrete base functional composite material, the preparation method who it is characterized in that conductive fiber reinforced concrete base functional composite material realizes according to the following steps: one, the electro-conductive fiber dispersion agent is dissolved in the volatile organic solvent, mass concentration is 0.1～10% solution, in solution, add electro-conductive fiber then, supersound process 10～180min after the magnetic agitation gets the electro-conductive fiber disperse phase liquid; Two, deionized water, superplasticizer, hardening accelerator, polymer emulsion, mineral admixture and cement mixing machinery are stirred evenly after, pack into the insulation die trial in, through levelling, jolt ramming, be prepared into the cement slurry matrix; Three, after the initial set of cement slurry matrix before the final set, to wherein adding the electro-conductive fiber disperse phase liquid, and the electro-conductive fiber disperse phase liquid applied direct current or alternating-electric field 1～3h, treat after the electro-conductive fiber disperse phase liquid drying the composite body of cement matrix and electro-conductive fiber; Four, repeating step two and 3 3～15 times obtain the base substrate that cement matrix and electro-conductive fiber are intervally arranged, and at upper surface casting cement slurry matrix; Five, after cement slurry matrix to be cast solidified 24h, form removal moved in the standard curing room maintenance predetermined length of time with test specimen, the conductive fiber reinforced concrete functional composite material; Wherein the mass ratio of electro-conductive fiber and electro-conductive fiber dispersion agent is 1: 0.1～10 in the step 1; The mass ratio of deionized water and cement is 0.30～0.80: 1 in the step 2, the mass ratio of superplasticizer and cement is 0.005～0.015: 1, the mass ratio of hardening accelerator and cement is 0～0.005: 1, the mass ratio of polymer emulsion and cement is 0.05～0.20: 1, and the mass ratio of mineral admixture and cement is 0.05～0.15: 1; The mass ratio of electro-conductive fiber and cement is 1: 20～200 in the step 3.
2, the preparation method of a kind of conductive fiber reinforced concrete base functional composite material according to claim 1 is characterized in that electro-conductive fiber in the step 1 is aluminize one or more the mixing in fiber, conductive-nano-fibers, the CNT (carbon nano-tube) of carbon fiber, conduction silver plated fiber, conduction.
3, the preparation method of a kind of conductive fiber reinforced concrete base functional composite material according to claim 1 is characterized in that electro-conductive fiber dispersion agent in the step 1 is one or more the mixing in methylcellulose gum, carboxymethyl cellulose, carboxyethyl cellulose, polyoxyethylene nonylphenol ether, gum arabic, Sodium dodecylbenzene sulfonate, sodium polyacrylate, the cetyl trimethylammonium bromide.
4, the preparation method of a kind of conductive fiber reinforced concrete base functional composite material according to claim 1 is characterized in that volatile organic solvent is dehydrated alcohol, Virahol, acetone, chloroform, ethyl acetate or perhydronaphthalene in the step 1.
5, the preparation method of a kind of conductive fiber reinforced concrete base functional composite material according to claim 1 is characterized in that superplasticizer in the step 2 is one or more the mixing in naphthalene sulfonic salt formaldehyde condensation products series high-efficiency water-reducing agent, sulfonated melamine compound resin series high-efficiency water-reducing agent, the carboxylic acid polyetherester block copolymer series high-efficiency water-reducing agent.
6, the preparation method of a kind of conductive fiber reinforced concrete base functional composite material according to claim 1 is characterized in that the hardening accelerator in the step 2 is trolamine type hardening accelerator, tri-isopropanolamine type hardening accelerator, villaumite hardening accelerator or sodium sulfate complex accelerator.
7, the preparation method of a kind of conductive fiber reinforced concrete base functional composite material according to claim 1 is characterized in that polymer emulsion in the step 2 is one or more the mixing in carboxyl styrene-butadiene emulsion, polyvinyl acetate emulsion, the interpolymer latex of polystyrene and acrylic ester.
8, the preparation method of a kind of conductive fiber reinforced concrete base functional composite material according to claim 1 is characterized in that mineral admixture in the step 2 is one or more mixing in silicon ash, flyash, zeolite powder, the silica powder.
9, the preparation method of a kind of conductive fiber reinforced concrete base functional composite material according to claim 1 is characterized in that applying DC electric field or the voltage that electric field is 5～60V in the step 3 is 10～380V, and frequency is the alternating-electric field of 50Hz～100kHz.
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| CN101712183B (en) * | 2009-10-20 | 2011-08-03 | 武汉理工大学 | Method for manufacturing chopped carbon fiber reinforced concrete |
| CN102936113A (en) * | 2011-08-15 | 2013-02-20 | 青岛理工大学 | Hybrid nanocomposite material used for buildings and preparation method thereof |
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| CN101712183B (en) * | 2009-10-20 | 2011-08-03 | 武汉理工大学 | Method for manufacturing chopped carbon fiber reinforced concrete |
| CN102936113A (en) * | 2011-08-15 | 2013-02-20 | 青岛理工大学 | Hybrid nanocomposite material used for buildings and preparation method thereof |
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| CN106946515A (en) * | 2017-02-23 | 2017-07-14 | 宁波高新区远创科技有限公司 | A kind of preparation method of electroconductive cement earthing material |
| CN108046711A (en) * | 2017-12-30 | 2018-05-18 | 姜向军 | A kind of preparation method of conducting concrete |
| CN108358519A (en) * | 2018-01-31 | 2018-08-03 | 广州大学 | A kind of alkali-activated carbonatite fly-ash slag conducting concrete and preparation method thereof having pressure-sensitive character |
| CN108358519B (en) * | 2018-01-31 | 2020-07-31 | 广州大学 | Alkali-activated fly ash slag conductive concrete with pressure-sensitive characteristic and preparation method thereof |
| CN108453868A (en) * | 2018-05-25 | 2018-08-28 | 深圳大学 | Fiber alignment distributed fibers enhance the preparation method and device of ultra-high performance concrete |
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| CN113352456A (en) * | 2021-05-11 | 2021-09-07 | 谢长安 | Preparation process of anti-fracture high-stability elevator counterweight block |
| CN113352456B (en) * | 2021-05-11 | 2023-01-06 | 广州超卓金属制品有限公司 | Preparation process of anti-fracture high-stability elevator counterweight block |
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