CN110407539A - A kind of surface functional group processing carbon nano-tube modification Reactive Powder Concrete of high impact properties - Google Patents
A kind of surface functional group processing carbon nano-tube modification Reactive Powder Concrete of high impact properties Download PDFInfo
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- CN110407539A CN110407539A CN201910702904.1A CN201910702904A CN110407539A CN 110407539 A CN110407539 A CN 110407539A CN 201910702904 A CN201910702904 A CN 201910702904A CN 110407539 A CN110407539 A CN 110407539A
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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
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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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- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
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- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
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Abstract
The invention discloses a kind of surface functional groups of high impact properties to handle carbon nano-tube modification Reactive Powder Concrete, it is characterized in that, the raw material of the surface functional group processing carbon nano-tube modification Reactive Powder Concrete of the high impact properties include cement, functional group's multi-walled carbon nano-tube, silicon ash, flyash, sand, water-reducing agent and water；Functional group's multi-walled carbon nano-tube is functionalized multi-wall carbonnanotubes or hydroxylated multi-walled carbon nanotubes.Functional group's multi-walled carbon nano-tube can significantly increase the dynamic compression strength of Reactive Powder Concrete, dynamic peak value strain and impact toughness.Under the strain rate range of 200-800/s, the multi-walled carbon nanotube volume of 0.25%-0.5%, the dynamic compression strength of concrete can be improved 71.3%, and dynamic peak value strain can be improved 101.1%, and impact toughness can be improved 100.8%.
Description
Technical field
The present invention relates to building material technical field, in particular to the surface functional group processing carbon of a kind of high impact properties is received
Mitron modified active powder concrete.
Background technique
Reactive Powder Concrete is a kind of novel ultra-high performance concrete, well-known with its high-intensitive, high-durability, and
Gradually it is applied in the fields such as bridge, skyscraper and nuclear industry.However, fine aggregate-the base of Reactive Powder Concrete itself
Body interface feature makes it inevitably expose more concrete weak areas, reduces its material structure to a certain extent
Overall performance.In addition, the excessively high compactness of Reactive Powder Concrete often leads to the aggravation of its brittle damage.Even more important
It is that under high strain-rate dynamic impulsion load, the compression time of concrete shortens, effective forced area reduces, and concrete material is crisp
Property destroy will be further exacerbated by, seriously affect the safety of concrete structure.
Discontinuous staple fiber or continuous fiber are often mixed in engineering in concrete, by the propagation road for hindering crackle
Diameter increases the energy absorption of material, improves the toughness of concrete material with this, then reduces the brittleness damage of concrete material
Wound.But this method can not only generate new hole inside concrete material, at the same fiber and and matrix between weak interface
Interface can be induced to form stress concentration point, cause material damage.In fact, cement-base composite material it is microcosmic-change of macroscopic behavior
Change is influenced since nanoscale.Therefore, the formation for reducing nanoscale crackle, preventing its development is micron order crackle, from
And the extension of macroscopic cracking is avoided to be of great significance.In recent years, researcher attempts to carry out concrete nanometer particle-modified,
Concrete substrate initial imperfection is reduced, and regulates and controls hydrated product pattern on nanoscale, improves the microcosmic knot of composite material
Structure.But before the high price and high additive (1%-10% of cement quality) of nanoparticle weaken its application in practical projects
Scape.
Summary of the invention
According to technical problem set forth above, and the surface functional group processing carbon nanotube for providing a kind of high impact properties changes
Property Reactive Powder Concrete.Multi-walled carbon nanotube is since (height is led for its excellent mechanics (intensity is high, deformation is big etc.) and thermal property
Heating rate), it is considered to be the nano-sized filler of perfect substitution traditional fibre in concrete composite material.Compared to zero-dimension nano grain
Son has good compatibility between one-dimensional carbon nanotube and cement-based material, guaranteeing nano-particles filled effect and nucleation
While effect, the high length-diameter ratio and high surface energy of carbon nanotube itself make it have both unique fiber bridge effect.But it compares
In traditional solid fiber, the hollow structure of carbon nanotube then makes it have the number of nanotubes significantly increased under identical volume.
In fact, the good chemical stability of carbon nanotube and lower density (compared to nanoparticle) make it under lesser volume
Extensive spatial distribution can be formed in basis material, then forms spatial network, and the energy for significantly improving composite material is inhaled
Receipts ability increases the dissipation of stress wave in impact process.And the unique hollow tubular structure of carbon nanotube can also be in aquation morning
Phase stores Free water and discharges in the later period, promotes the secondary reaction of hydration of cement-based material.More importantly passing through functional group
Change handles the wellability and hydrophily that can improve multi-walled carbon nanotube, is conducive to improve multi-walled carbon nanotube in concrete substrate
In dispersion；Furthermore carboxyl processing can increase the surface active point of multi-walled carbon nanotube, reinforce multi wall carbon by chemical reaction
Interfacial adhesion between nanotube and concrete substrate to improve the combined efficiency and effect of multi-walled carbon nanotube, and then improves
The overall performance of concrete material.The technological means that the present invention uses is as follows:
A kind of surface functional group processing carbon nano-tube modification Reactive Powder Concrete of high impact properties, the high impact-resistant
Property the raw material of surface functional group processing carbon nano-tube modification Reactive Powder Concrete include that cement, function dough multi wall carbon are received
Mitron, silicon ash, flyash, sand, water-reducing agent and water；
Functional group's multi-walled carbon nano-tube is functionalized multi-wall carbonnanotubes or hydroxylated multi-walled carbon nanotubes.
The high impact properties surface functional group processing carbon nano-tube modification Reactive Powder Concrete raw material include
Following parts by weight substance: 0.796-1 parts of cement, multi-walled carbon nano-tube 0.0025-0.005 parts of functional group, silicon ash 0.25-
0.313 part, 0.2-0.25 parts of flyash, 1.1-1.375 parts of sand, 0.015-0.03 parts of water-reducing agent and 0.3-0.375 parts of water.
Functional group's multi-walled carbon nano-tube be it is powdered, outer diameter be less than 8nm, internal diameter between 2-5nm, length be situated between
Between 0.5-30 μm, specific surface area 220m2/ g or more, real density 2.05-2.15g/cm3。
The functionalized multi-wall carbonnanotubes are long functionalized multi-wall carbonnanotubes or short functionalized multi-wall carbonnanotubes, institute
Stating hydroxylated multi-walled carbon nanotubes is long hydroxylated multi-walled carbon nanotubes or short hydroxylated multi-walled carbon nanotubes, long carboxylated multi wall
The length of carbon nanotube and long hydroxylated multi-walled carbon nanotubes between 10-30 μm, and short functionalized multi-wall carbonnanotubes and
The length of short hydroxylated multi-walled carbon nanotubes is between 0.5-2 μm.
The purity of multi-walled carbon nanotube is greater than 98% in the functionalized multi-wall carbonnanotubes, carboxyl-content 3.9%；
The purity of multi-walled carbon nanotube is greater than 98% in the hydroxylated multi-walled carbon nanotubes, hydroxy radical content 5.6%.
The average grain diameter of the silicon ash is 150nm.
The flyash is second class powered coal ash, partial size 0.01-0.1mm.
The particle size range of the sand is 0.12-0.83mm, SiO in the sand2Content be greater than 99.9%, the sand be stone
Sand.
The water-reducing agent is polycarboxylate water-reducer, solid content 40-50%.
The cement is ordinary portland cement.
The advantages of both present invention combination functional group's multi-walled carbon nano-tube and Reactive Powder Concrete, utilize function dough
The promotion humidification itself of multi-walled carbon nanotube and Reactive Powder Concrete enhancing mechanism and mutually cooperateed with, it is final to obtain
The surface functional group processing carbon nanotube composite reactive powder concrete for having high impact properties.
Compared with prior art, the invention has the following advantages that
1, the small-size effect of multi-walled carbon nanotube is filled with the nano-micrometre hole between hydrated product；Its high table simultaneously
Face energy and high-termal conductivity improve the interface binding intensity of cement matrix, and shift the thermal stress of hydration in hydration process, reduce
The self-constriction of concrete.In addition, the multi-walled carbon nanotube of a large amount of hollow structures can store Free water and discharge in the later period, promote
The secondary reaction of hydration of cement.Importantly, the functional group of multi-wall carbon nano-tube pipe surface helps to increase multi-walled carbon nanotube
Chemical bond between matrix is strong, phase between attracting more cementitious material molecules to be formed, and then improves multi-walled carbon nanotube and shifts matrix
The efficiency of load.And the carboxyl of multi-wall carbon nano-tube pipe surface can generate new aquation silicic acid with hydrated product calcium hydroxide reaction
Calcium further increases the degree of hydration of cement, increases the compression strength of concrete.In fact, compared to traditional solid fiber and
Zero-dimension nano particle, the hollow structure and low-density of carbon nanotube make it have a large amount of number of nanotubes under identical volume,
Then the nanometer enhancement effect of carbon nanotube is significantly improved.
2, Reactive Powder Concrete matrix can be improved in the activation point of the high rigidity of multi-walled carbon nanotube and its surface enhanced
Elasticity modulus；The filing effect of multi-walled carbon nanotube can further increase the compactness of concrete material simultaneously, then answer in height
More elastic deformation energy are absorbed under variability, slow down MATRIX CRACKING trend, improve the deformability of composite material.In addition, multi wall
Carbon nanotube by absorb hydrated calcium silicate gel in proton water, shorten between calcium in gel structure, oxygen, silicon atom away from
From increasing the tetrahedral degree of polymerization of silicate in gel and average molecular chain length prolong so as to improve the network structure of gel
Slow micro-crack stablizes extension.In fact, it is largely distributed in the carbon nanotube in cement matrix, the severe deformation ability of itself
The deformability of concrete material is improved to a certain extent.
3, the tip clearance of the multi-walled carbon nanotube bridging micro-crack with high length-diameter ratio, hinders the propagation road of crackle
Diameter, induction crackle deflect；Meanwhile the nucleating effect of multi-walled carbon nanotube reduces the crystal orientation of calcium hydroxide, causes
Crackle along crystalline fracture path becomes more tortuous.In addition, the extraction and fracture of multi-walled carbon nanotube also can further absorb
Crack the strain energy discharged, increases the energy dissipation of stress wave, delays crack propagation.Importantly, in impact process, greatly
Amount is converted into kinetic energy by the energy that stress wave propagation is formed, and well dispersed multi-walled carbon nanotube can form spring-damper net
Network, increases the energy absorption capability of composite material, then slows down concrete sample damage, and the dynamic limit for improving composite material is answered
Become.
4, compared to long multi-wall carbon nanotube (10-30 μm), (0.5-2 μm) of short MWCNTs has preferable dispersion
Ability facilitates the reticular structure for enhancing cement matrix, improves the toughness of concrete material.
Compared to hydroxylated multi-walled carbon nanotubes, functionalized multi-wall carbonnanotubes can be by consuming calcium hydroxide, further
The hydrated calcium silicate gel with network structure is generated, the development and propagation of crackle are then more efficiently prevented, improves coagulation
The shock resistance of soil material.And the stronger wellability of hydroxylated multi-walled carbon nanotubes itself and hydrophilicity then can be further
Promote the dispersion of multi-walled carbon nanotube in water, then fully ensures that nanometer enhancing effect of the multi-walled carbon nanotube in cementitious material
It answers, improves the shock resistance of concrete material.
5, under 0.5% multi-walled carbon nanotube volume, the dynamic of concrete is can be improved in short functionalized multi-wall carbonnanotubes
Compression strength is up to 71.3%, and it may be up to 106.2% and 94.6% to the raising of impact toughness and impact Dissipated energy.Short hydroxyl
Multi-walled carbon nano-tube, which improves the shock resistance of concrete, still has obvious effect, when nanotube volume is 0.5%, mixes
101.6% and 89.0% is respectively increased in the impact toughness of solidifying soil material and impact Dissipated energy.
6, functional group's multi-walled carbon nano-tube can significantly increase the dynamic compression strength of Reactive Powder Concrete, dynamic peak
Value strain and impact toughness.Under the strain rate range of 200-800/s, the multi-walled carbon nanotube volume of 0.25%-0.5%, mix
The dynamic compression strength for coagulating soil can be improved 71.3%, and dynamic peak value strain can be improved 101.1%, and impact toughness can be improved
100.8%.
The present invention can be widely popularized in the fields such as construction material and important infrastructure based on the above reasons.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to do simply to introduce, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without any creative labor, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the filing effect of multi-walled carbon nanotube and nucleating effect schematic diagram in a specific embodiment of the invention.
Fig. 2 is the stress transfer of multi-walled carbon nanotube and network enhancing schematic diagram in a specific embodiment of the invention.
Fig. 3 is the height in a specific embodiment of the invention under 0.25%, 0.5% functional group's multi-walled carbon nano-tube volume
The dynamic compression strength of the surface functional group processing carbon nano-tube modification Reactive Powder Concrete of impact resistance changes with strain rate
Histogram.
Fig. 4 is the height in a specific embodiment of the invention under 0.25%, 0.5% functional group's multi-walled carbon nano-tube volume
The dynamic peak value strain of the surface functional group processing carbon nano-tube modification Reactive Powder Concrete of impact resistance changes with strain rate
Histogram.
Fig. 5 is the height in a specific embodiment of the invention under 0.25%, 0.5% functional group's multi-walled carbon nano-tube volume
The dynamic failure strain of the surface functional group processing carbon nano-tube modification Reactive Powder Concrete of impact resistance changes with strain rate
Histogram.
Fig. 6 is the height in a specific embodiment of the invention under 0.25%, 0.5% functional group's multi-walled carbon nano-tube volume
Impact resistance surface functional group processing carbon nano-tube modification Reactive Powder Concrete impact toughness change with strain rate three
Tie up histogram.
Fig. 7 is the height in a specific embodiment of the invention under 0.25%, 0.5% functional group's multi-walled carbon nano-tube volume
What the impact Dissipated energy of the surface functional group processing carbon nano-tube modification Reactive Powder Concrete of impact resistance changed with strain rate
D prism map.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
A kind of surface functional group processing carbon nano-tube modification Reactive Powder Concrete of high impact properties, the high impact-resistant
Property the raw material of surface functional group processing carbon nano-tube modification Reactive Powder Concrete include that cement, function dough multi wall carbon are received
Mitron, silicon ash, flyash, sand, water-reducing agent and water；
Functional group's multi-walled carbon nano-tube is functionalized multi-wall carbonnanotubes, hydroxylated multi-walled carbon nanotubes, short carboxylic
One of base multi-walled carbon nano-tube or short hydroxylated multi-walled carbon nanotubes.
The raw material packet of the surface functional group processing carbon nano-tube modification Reactive Powder Concrete of the high impact resistance
Include following parts by weight substance: 0.796-1 parts of cement, multi-walled carbon nano-tube 0.0025-0.005 parts of functional group, silicon ash 0.25-
0.313 part, 0.2-0.25 parts of flyash, 1.1-1.375 parts of sand, 0.015-0.03 parts of water-reducing agent and 0.3-0.375 parts of water.
Functional group's multi-walled carbon nano-tube be it is powdered, outer diameter be less than 8nm, internal diameter is between 2-5nm, specific surface
Product 220m2/ g or more, real density 2.1g/cm3.The functionalized multi-wall carbonnanotubes be long functionalized multi-wall carbonnanotubes or
Short functionalized multi-wall carbonnanotubes, the hydroxylated multi-walled carbon nanotubes are that long hydroxylated multi-walled carbon nanotubes or short hydroxylating are more
The length of wall carbon nano tube, long functionalized multi-wall carbonnanotubes and long hydroxylated multi-walled carbon nanotubes is short between 10-30 μm
The length of functionalized multi-wall carbonnanotubes and short hydroxylated multi-walled carbon nanotubes is between 0.5-2 μm.
The purity of multi-walled carbon nanotube is greater than 98% in the functionalized multi-wall carbonnanotubes, carboxyl-content 3.9%；
The purity of multi-walled carbon nanotube is greater than 98% in the hydroxylated multi-walled carbon nanotubes, hydroxy radical content 5.6%.
The average grain diameter of the silicon ash is 150nm.The flyash is second class powered coal ash, partial size 0.01-0.1mm.Institute
The particle size range for stating sand is 0.12-0.83mm, SiO in the sand2Content be greater than 99.9%, the sand be quartz sand.It is described
Water-reducing agent is polycarboxylate water-reducer, solid content 45%.The cement is ordinary portland cement.
Embodiment
1 raw material of table and its parts by weight
Using separate type Hopkinson press rods to test specimen carry out impact compression test, sample dimensions be Φ 15.0mm ×
30.0mm, impact shank diameter are 37.0mm.Using the strain rate of different size of transmitting pressure control test specimen, and in elastic rod
Stress wave be acquired.Data handling procedure is as follows:
Data processing, the mean stress of calculation testing piece, mean strain are carried out to collected waveform using three wave method formula
Rate and mean strain；Obtain concrete dynamic stress-strain curve, and record dynamic compression strength, corresponding peak value is answered
Change and limiting strain；It is calculated in conjunction with load-deformation curve area integral and formula, obtains impact toughness and impact Dissipated energy, use
The ability of energy and the size of dissipative stress wave energy are absorbed in deformation process to characterize the material of unit volume.
From the figure 3, it may be seen that adding the reactive powder of functionalized multi-wall carbonnanotubes when multi-walled carbon nanotube volume is 0.25%
Concrete improves 69.4% compared with the dynamic compression strength of blank Reactive Powder Concrete；And when multi-walled carbon nanotube volume is
When 0.5%, the dynamic compression strength of concrete is can be improved up to 71.3% in functionalized multi-wall carbonnanotubes.As shown in Figure 4, it strains
When rate reaches 800/s, add 0.25% functionalized multi-wall carbonnanotubes can be improved concrete dynamic peak value strain reach
71.3%；And under 0.5% multi-walled carbon nanotube volume, the incorporation of hydroxylated multi-walled carbon nanotubes can make Reactive Powder Concrete
Peak strain increase by 101.1%.As shown in Figure 5, strain rate 200/s, when multi-walled carbon nanotube volume is 0.25%, carboxyl
Carbon nano tube can make the dynamic failure strain of blank Reactive Powder Concrete improve 32.4%, and hydroxylated multi-walled carbon nanotubes
Incorporation can then make the parameter improve 25.5%.
By Fig. 6 and Fig. 7 it is found that the incorporation of functionalized multi-wall carbonnanotubes is so that the impact of blank Reactive Powder Concrete is tough
Degree and impact Dissipated energy are respectively increased 106.2%, 94.6%, and the incorporation of hydroxylated multi-walled carbon nanotubes is so that the two parameters
101.6% and 89.0% is improved compared with blank Reactive Powder Concrete respectively.By the above experimental data it is found that under low variability
(200-500/s), functional group's multi-walled carbon nano-tube can significantly improve the shock resistance of Reactive Powder Concrete, dynamic
Peak strain and impact toughness value even can be improved 100% or more.It can be seen that multi-walled carbon nanotube from Fig. 1 and Fig. 2 and pass through it
Micropore in filing effect filling concrete matrix, increases the compactness of concrete material；Its nucleating effect reduces hydrogen-oxygen simultaneously
Change calcium crystalline size and orientation, so that the propagation path of crackle is deflected, then inhibit crack propagation.Multi-walled carbon nanotube itself
Highly thermally conductive property promote transfer of the thermal stress of hydration in cement matrix, reduce the initial imperfection of concrete material.In addition, multi wall
The network enhancement effect of carbon nanotube keeps stress distribution more uniform, and inducing concrete material carries out multidirectional cracking, increases energy
It absorbs, toughening effect is played to concrete material.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. a kind of surface functional group of high impact properties handles carbon nano-tube modification Reactive Powder Concrete, which is characterized in that institute
The raw material for stating the surface functional group processing carbon nano-tube modification Reactive Powder Concrete of high impact properties include cement, functional group
Multi-walled carbon nano-tube, silicon ash, flyash, sand, water-reducing agent and water；
Functional group's multi-walled carbon nano-tube is functionalized multi-wall carbonnanotubes or hydroxylated multi-walled carbon nanotubes.
2. the surface functional group of high impact properties according to claim 1 handles carbon nano-tube modification reactive powder coagulation
Soil, which is characterized in that the former material of the surface functional group processing carbon nano-tube modification Reactive Powder Concrete of the high impact properties
Material includes following parts by weight substance: 0.796-1 parts of cement, multi-walled carbon nano-tube 0.0025-0.005 parts of functional group, silicon ash
0.25-0.313 parts, 0.2-0.25 parts of flyash, 1.1-1.375 parts of sand, 0.015-0.03 parts of water-reducing agent and water 0.3-0.375
Part.
3. the surface functional group processing carbon nano-tube modification reactive powder of high impact properties according to claim 1 or 2 is mixed
Solidifying soil, which is characterized in that functional group's multi-walled carbon nano-tube be it is powdered, outer diameter is less than 8nm, internal diameter between 2-5nm it
Between, length is between 0.5-30 μm, specific surface area 220m2/ g or more, real density 2.05-2.15g/cm3。
4. the surface functional group of high impact properties according to claim 3 handles carbon nano-tube modification reactive powder coagulation
Soil, which is characterized in that
The functionalized multi-wall carbonnanotubes are long functionalized multi-wall carbonnanotubes or short functionalized multi-wall carbonnanotubes, the hydroxyl
Base multi-walled carbon nano-tube is long hydroxylated multi-walled carbon nanotubes or short hydroxylated multi-walled carbon nanotubes, and long carboxylated multi wall carbon is received
The length of mitron and long hydroxylated multi-walled carbon nanotubes is between 10-30 μm, and short functionalized multi-wall carbonnanotubes and short hydroxyl
The length of base multi-walled carbon nano-tube is between 0.5-2 μm.
5. the surface functional group of high impact properties according to claim 2 handles carbon nano-tube modification reactive powder coagulation
Soil, which is characterized in that the purity of multi-walled carbon nanotube is greater than 98% in the functionalized multi-wall carbonnanotubes, and carboxyl-content is
3.9%；
The purity of multi-walled carbon nanotube is greater than 98% in the hydroxylated multi-walled carbon nanotubes, hydroxy radical content 5.6%.
6. the surface functional group processing carbon nano-tube modification reactive powder of high impact properties according to claim 1 or 2 is mixed
Solidifying soil, which is characterized in that the average grain diameter of the silicon ash is 150nm.
7. the surface functional group processing carbon nano-tube modification reactive powder of high impact properties according to claim 1 or 2 is mixed
Solidifying soil, which is characterized in that the flyash is second class powered coal ash, partial size 0.01-0.1mm.
8. the surface functional group processing carbon nano-tube modification reactive powder of high impact properties according to claim 1 or 2 is mixed
Solidifying soil, which is characterized in that the particle size range of the sand is 0.12-0.83mm, SiO in the sand2Content be greater than 99.9%, institute
Stating sand is quartz sand.
9. the surface functional group processing carbon nano-tube modification reactive powder of high impact properties according to claim 1 or 2 is mixed
Solidifying soil, which is characterized in that the water-reducing agent is polycarboxylate water-reducer, solid content 40-50%.
10. the surface functional group processing carbon nano-tube modification reactive powder of high impact properties according to claim 1 or 2 is mixed
Solidifying soil, which is characterized in that the cement is ordinary portland cement.
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| CN111362628A (en) * | 2020-03-18 | 2020-07-03 | 盐城工学院 | Modified carbon nano tube reinforced and toughened geopolymer and preparation method thereof |
| CN114477898A (en) * | 2022-01-25 | 2022-05-13 | 苏州金螳螂建筑装饰股份有限公司 | Super-soft impervious waterproof bonding material and construction method thereof |
| CN114477885A (en) * | 2022-02-21 | 2022-05-13 | 湖北旭合森混凝土科技有限公司 | Anti-cracking ultrahigh-performance concrete pole and preparation method thereof |
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