CN113045254A - Carbon-series micro-nano graded trans-scale fiber reinforced cement mortar and preparation method thereof - Google Patents
Carbon-series micro-nano graded trans-scale fiber reinforced cement mortar and preparation method thereof Download PDFInfo
- Publication number
- CN113045254A CN113045254A CN202110357476.0A CN202110357476A CN113045254A CN 113045254 A CN113045254 A CN 113045254A CN 202110357476 A CN202110357476 A CN 202110357476A CN 113045254 A CN113045254 A CN 113045254A
- Authority
- CN
- China
- Prior art keywords
- carbon
- parts
- trans
- micro
- nano
- Prior art date
- 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.)
- Pending
Links
Classifications
-
- 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
-
- 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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/022—Carbon
- C04B14/026—Carbon of particular shape, e.g. nanotubes
-
- 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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/38—Fibrous materials; Whiskers
- C04B14/386—Carbon
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
-
- 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
Abstract
The invention discloses carbon-series micro-nano graded cross-scale fiber reinforced cement mortar, which belongs to the technical field of cement mortar preparation and is prepared from the following substances in parts by weight: 1-4 parts of micro-nano graded trans-scale fiber, 700-800 parts of cement, 1200-1300 parts of sand, 7-8 parts of water reducing agent, 1-2 parts of defoaming agent, 3-4 parts of dispersing agent and 220-240 parts of water. The carbon series micro-nano graded trans-scale fiber reinforced cement mortar prepared by the invention has more excellent mechanical and electrical properties.
Description
Technical Field
The invention belongs to the technical field of cement mortar preparation, and particularly relates to carbon-series micro-nano graded cross-scale fiber reinforced cement mortar and a preparation method thereof.
Background
Cement mortar is one of the most important cement-based composite materials in the field of civil engineering construction at present, and is widely applied to national defense, civil air defense engineering and civil building engineering. However, the traditional cement mortar has the defects of large brittleness, easy cracking, low tensile strength, poor impact resistance, single function and the like, is difficult to meet the requirements of building structures on development towards super-high-rise, large-span and multi-functionalization, and can not meet the requirements of modern battlefield environments which are increasingly complex and changeable on the service performance and safety performance of military protection engineering. In order to break through the practical application bottleneck of the traditional mortar in engineering construction caused by the defects of the traditional mortar, the mechanical properties of the cement-based mortar material need to be further improved, and effective means for endowing the mortar material with functional properties such as conductivity, alertness and the like are actively explored.
Carbon fiber cement mortar is an important way for researching the reinforcement and modification of mortar. The carbon fiber is added into the cement-based building material matrix, so that the defects of mechanical properties such as tensile strength, bending resistance and the like of the traditional mortar can be overcome, and the common mortar can have a series of excellent functional characteristics such as electric conduction, pressure sensitivity, temperature sensitivity and the like. However, the original carbon fibers have smooth surfaces and are chemically inert, effective interface combination with a cement-based composite material matrix is difficult to realize, and under the action of impact load, the carbon fibers and the matrix are easy to peel off and pull out to damage, so that the macroscopic mechanical properties of carbon fiber cement mortar are influenced; in addition, in the carbon fiber doping process, agglomeration and winding are easy to occur, uniform dispersion in a material matrix is difficult to realize, and the conductivity of the prepared mortar is unstable, so that the improvement effect of the carbon fibers on the cement mortar is limited.
Disclosure of Invention
The invention aims to solve the existing problems and provides carbon-based micro-nano graded cross-scale fiber reinforced cement mortar and a preparation method thereof.
The invention is realized by the following technical scheme:
a carbon-based micro-nano graded trans-scale fiber reinforced cement mortar is prepared from the following substances in parts by weight:
1-4 parts of micro-nano graded trans-scale fiber, 700-800 parts of cement, 1200-1300 parts of sand, 7-8 parts of water reducing agent, 1-2 parts of defoaming agent, 3-4 parts of dispersing agent and 220-240 parts of water.
Preferably, the food is prepared from the following substances in parts by weight:
2.64 parts of micro-nano graded trans-scale fiber, 766 parts of cement, 1280 parts of sand, 7.66 parts of water reducing agent, 1.53 parts of defoaming agent, 3.06 parts of dispersing agent and 230 parts of water.
Further, the preparation method of the micro-nano graded trans-scale fiber comprises the following steps:
(1) carbon fiber desizing treatment;
based on a Soxhlet extraction method, extracting carbon fiber tows by using acetone, removing a sizing agent on the surfaces of the carbon fiber tows, taking out the carbon fibers after 48 hours, then putting the carbon fibers into absolute ethyl alcohol to clean for three times, then putting the carbon fibers into deionized water to clean for three times, and finally putting the carbon fibers into a constant-temperature drying oven to dry for later use.
(2) Preparing a carbon nano tube dispersion liquid;
correspondingly mixing the carbon nano tube with a hexadecyl trimethyl ammonium bromide solution according to the weight-volume ratio of 0.75g to 500mL, and performing ultrasonic treatment for 1.5h to obtain a carbon nano tube dispersion liquid for later use;
(3) preparing micro-nano graded cross-scale fibers:
and (3) pouring the carbon nanotube dispersion liquid prepared in the step (2) into an electrophoresis tank, and performing electrophoretic deposition by taking the stainless steel sheet and the carbon fiber treated in the step (1) as two electrodes respectively, wherein the electrophoretic deposition can be performed for 1 hour.
Further, the temperature in the drying oven in the step (1) is controlled to be 60 ℃.
Further, the concentration of the hexadecyl trimethyl ammonium bromide solution in the step (2) is 0.00092 mol/L; the power of the ultrasonic treatment was controlled to 200W.
Further, before the carbon fiber is used as an electrode in the step (3), the carbon fiber is firstly collected into a bundle shape and then used; the distance between the stainless steel sheet and the carbon fiber is controlled to be 2 cm; the voltage during the electrophoresis treatment was controlled to 60V.
A preparation method of carbon series micro-nano graded trans-scale fiber reinforced cement mortar comprises the following steps:
s1, weighing the micro-nano graded trans-scale fiber, cement, sand, a water reducing agent, a defoaming agent, a dispersing agent and water according to the corresponding weight parts for later use;
s2, mixing half of water in parts by weight with the micro-nano graded trans-scale fiber and the dispersing agent together, and performing ultrasonic dispersion uniformly to obtain a fiber water dispersion for later use;
s3, mixing the remaining half of water, a water reducing agent and a defoaming agent together, and uniformly stirring to obtain a mixture A for later use;
s4, mixing the cement and the sand together, and putting the mixture into a stirrer for dry stirring for 2 min;
and S5, putting the fiber aqueous dispersion prepared in the step S2 and the mixture prepared in the step S3 into the stirrer treated in the step S4, stirring for 3-6 min, and taking out to obtain the finished cement mortar.
Compared with the prior art, the invention has the following advantages:
as a multiphase composite material, the cement mortar has a remarkable multi-scale characteristic in the composition structure, and the load damage process is also carried out on multiple scales: the internal micro-cracks and other original defects develop and gradually expand into macro-cracks, and then the macro-cracks are merged and penetrated, and finally the whole structure is damaged. Aiming at the multi-scale damage process, the micro-nano graded trans-scale fibers are doped into the mortar matrix, so that the expansion of cracks can be restrained at corresponding levels and stages, and the mechanical property of the cement mortar is effectively improved.
Meanwhile, the micro-nano hierarchical trans-scale fiber provided by the invention is prepared based on the carbon fiber and the carbon nano tube, the inherent property of the carbon-based filler is reserved, and the resistivity of the cement-based composite material can be greatly reduced theoretically, so that the cement-based composite material has obvious conductivity. Therefore, the carbon series micro-nano graded trans-scale fiber reinforced cement mortar prepared by the invention has more excellent mechanical and electrical properties.
Specifically, after the surface modification treatment is carried out on the carbon fibers by using the functionalized carbon nanotubes, the content of polar oxygen-containing functional groups such as carboxyl and the like on the surfaces of the carbon fibers can be increased, and the wettability of the carbon fibers is improved, so that the carbon fibers can be better dispersed in a cement-based composite material matrix; the roughness of the surface of the original carbon fiber is increased, so that the mechanical engagement capacity and the bonding performance of the original carbon fiber and the interface of the mortar matrix are better, when the mortar matrix is subjected to external load, the carbon fiber can be adhered to the inside of the matrix and is not easy to pull out or peel off, and the effects of reinforcement, toughening and crack resistance can be exerted to the maximum extent; the carbon fibers and the carbon nanotubes deposited on the surfaces of the carbon fibers can improve the internal pore structure characteristics of the mortar by filling microscopic and nanoscopic holes and cracks among cement hydration products, so that the overall structure of the mortar is more compact. Meanwhile, the conductivity of cement mortar can be endowed by doping a proper amount of carbon-based micro-nano graded trans-scale fibers, so that intelligent fatigue damage detection, quality control and the like of a building structure can be realized. In addition, most of the materials for shielding electromagnetic interference at present are metal, the cost-effectiveness ratio is low, the construction is difficult, and the application in practical protection engineering is difficult, so the carbon system micro-nano graded trans-scale fiber reinforced cement mortar has important significance for the construction and development of national defense engineering.
Detailed Description
Example 1
A carbon-based micro-nano graded trans-scale fiber reinforced cement mortar is prepared from the following substances in parts by weight:
1 part of micro-nano graded trans-scale fiber, 700 parts of cement, 1200 parts of sand, 7 parts of water reducing agent, 1 part of defoaming agent, 3 parts of dispersing agent and 220 parts of water.
The preparation method of the micro-nano graded trans-scale fiber comprises the following steps:
(1) carbon fiber desizing treatment;
based on a Soxhlet extraction method, extracting carbon fiber tows by using acetone, removing a sizing agent on the surfaces of the carbon fiber tows, taking out the carbon fibers after 48 hours, then putting the carbon fibers into absolute ethyl alcohol to clean for three times, then putting the carbon fibers into deionized water to clean for three times, and finally putting the carbon fibers into a constant-temperature drying oven to dry for later use.
(2) Preparing a carbon nano tube dispersion liquid;
correspondingly mixing the carbon nano tube with a hexadecyl trimethyl ammonium bromide solution according to the weight-volume ratio of 0.75g to 500mL, and performing ultrasonic treatment for 1.5h to obtain a carbon nano tube dispersion liquid for later use;
(3) preparing micro-nano graded cross-scale fibers:
and (3) pouring the carbon nanotube dispersion liquid prepared in the step (2) into an electrophoresis tank, and performing electrophoretic deposition by taking the stainless steel sheet and the carbon fiber treated in the step (1) as two electrodes respectively, wherein the electrophoretic deposition can be performed for 1 hour.
The temperature in the drying oven in step (1) was controlled to 60 ℃.
The concentration of the hexadecyl trimethyl ammonium bromide solution in the step (2) is 0.00092 mol/L; the power of the sonication was controlled to 200W.
Before the carbon fiber is used as an electrode in the step (3), the carbon fiber is firstly bundled and then used; the distance between the stainless steel sheet and the carbon fiber is controlled to be 2 cm; the voltage during the electrophoresis was controlled to 60V.
A preparation method of carbon series micro-nano graded trans-scale fiber reinforced cement mortar comprises the following steps:
s1, weighing the micro-nano graded trans-scale fiber, cement, sand, a water reducing agent, a defoaming agent, a dispersing agent and water according to the corresponding weight parts for later use;
s2, mixing half of water in parts by weight with the micro-nano graded trans-scale fiber and the dispersing agent together, and performing ultrasonic dispersion uniformly to obtain a fiber water dispersion for later use;
s3, mixing the remaining half of water, a water reducing agent and a defoaming agent together, and uniformly stirring to obtain a mixture A for later use;
s4, mixing the cement and the sand together, and putting the mixture into a stirrer for dry stirring for 2 min;
and S5, putting the fiber aqueous dispersion prepared in the step S2 and the mixture prepared in the step S3 into the stirrer treated in the step S4, stirring for 3min, and taking out to obtain the finished cement mortar.
Example 2
A carbon-based micro-nano graded trans-scale fiber reinforced cement mortar is prepared from the following substances in parts by weight:
2.64 parts of micro-nano graded trans-scale fiber, 766 parts of cement, 1280 parts of sand, 7.66 parts of water reducing agent, 1.53 parts of defoaming agent, 3.06 parts of dispersing agent and 230 parts of water.
The preparation method of the micro-nano graded trans-scale fiber comprises the following steps:
(1) carbon fiber desizing treatment;
based on a Soxhlet extraction method, extracting carbon fiber tows by using acetone, removing a sizing agent on the surfaces of the carbon fiber tows, taking out the carbon fibers after 48 hours, then putting the carbon fibers into absolute ethyl alcohol to clean for three times, then putting the carbon fibers into deionized water to clean for three times, and finally putting the carbon fibers into a constant-temperature drying oven to dry for later use.
(2) Preparing a carbon nano tube dispersion liquid;
the carbon nano tube and the hexadecyl trimethyl ammonium bromide solution are mixed according to the weight volume ratio of 0.75g:500mL of the mixture is mixed, and the mixture is subjected to ultrasonic treatment for 1.5h to obtain carbon nanotube dispersion liquid for later use;
(3) preparing micro-nano graded cross-scale fibers:
and (3) pouring the carbon nanotube dispersion liquid prepared in the step (2) into an electrophoresis tank, and performing electrophoretic deposition by taking the stainless steel sheet and the carbon fiber treated in the step (1) as two electrodes respectively, wherein the electrophoretic deposition can be performed for 1 hour.
The temperature in the drying oven in step (1) was controlled to 60 ℃.
The concentration of the hexadecyl trimethyl ammonium bromide solution in the step (2) is 0.00092 mol/L; the power of the sonication was controlled to 200W.
Before the carbon fiber is used as an electrode in the step (3), the carbon fiber is firstly bundled and then used; the distance between the stainless steel sheet and the carbon fiber is controlled to be 2 cm; the voltage during the electrophoresis was controlled to 60V.
A preparation method of carbon series micro-nano graded trans-scale fiber reinforced cement mortar comprises the following steps:
s1, weighing the micro-nano graded trans-scale fiber, cement, sand, a water reducing agent, a defoaming agent, a dispersing agent and water according to the corresponding weight parts for later use;
s2, mixing half of water in parts by weight with the micro-nano graded trans-scale fiber and the dispersing agent together, and performing ultrasonic dispersion uniformly to obtain a fiber water dispersion for later use;
s3, mixing the remaining half of water, a water reducing agent and a defoaming agent together, and uniformly stirring to obtain a mixture A for later use;
s4, mixing the cement and the sand together, and putting the mixture into a stirrer for dry stirring for 2 min;
and S5, putting the fiber aqueous dispersion prepared in the step S2 and the mixture prepared in the step S3 into the stirrer treated in the step S4, stirring for 5min, and taking out to obtain the finished cement mortar.
Example 3
A carbon-based micro-nano graded trans-scale fiber reinforced cement mortar is prepared from the following substances in parts by weight:
4 parts of micro-nano graded trans-scale fiber, 800 parts of cement, 1300 parts of sand, 8 parts of water reducing agent, 2 parts of defoaming agent, 4 parts of dispersing agent and 240 parts of water.
The preparation method of the micro-nano graded trans-scale fiber comprises the following steps:
(1) carbon fiber desizing treatment;
based on a Soxhlet extraction method, extracting carbon fiber tows by using acetone, removing a sizing agent on the surfaces of the carbon fiber tows, taking out the carbon fibers after 48 hours, then putting the carbon fibers into absolute ethyl alcohol to clean for three times, then putting the carbon fibers into deionized water to clean for three times, and finally putting the carbon fibers into a constant-temperature drying oven to dry for later use.
(2) Preparing a carbon nano tube dispersion liquid;
correspondingly mixing the carbon nano tube with a hexadecyl trimethyl ammonium bromide solution according to the weight-volume ratio of 0.75g to 500mL, and performing ultrasonic treatment for 1.5h to obtain a carbon nano tube dispersion liquid for later use;
(3) preparing micro-nano graded cross-scale fibers:
and (3) pouring the carbon nanotube dispersion liquid prepared in the step (2) into an electrophoresis tank, and performing electrophoretic deposition by taking the stainless steel sheet and the carbon fiber treated in the step (1) as two electrodes respectively, wherein the electrophoretic deposition can be performed for 1 hour.
The temperature in the drying oven in step (1) was controlled to 60 ℃.
The concentration of the hexadecyl trimethyl ammonium bromide solution in the step (2) is 0.00092 mol/L; the power of the sonication was controlled to 200W.
Before the carbon fiber is used as an electrode in the step (3), the carbon fiber is firstly bundled and then used; the distance between the stainless steel sheet and the carbon fiber is controlled to be 2 cm; the voltage during the electrophoresis was controlled to 60V.
A preparation method of carbon series micro-nano graded trans-scale fiber reinforced cement mortar comprises the following steps:
s1, weighing the micro-nano graded trans-scale fiber, cement, sand, a water reducing agent, a defoaming agent, a dispersing agent and water according to the corresponding weight parts for later use;
s2, mixing half of water in parts by weight with the micro-nano graded trans-scale fiber and the dispersing agent together, and performing ultrasonic dispersion uniformly to obtain a fiber water dispersion for later use;
s3, mixing the remaining half of water, a water reducing agent and a defoaming agent together, and uniformly stirring to obtain a mixture A for later use;
s4, mixing the cement and the sand together, and putting the mixture into a stirrer for dry stirring for 2 min;
and S5, putting the fiber aqueous dispersion prepared in the step S2 and the mixture prepared in the step S3 into the stirrer treated in the step S4, stirring for 6min, and taking out to obtain the finished cement mortar.
The raw material models and parameters in the above embodiment of the invention are as follows:
carbon fiber: T700-12K resin-free PAN-based carbon fiber, available from Toray corporation of Japan, having a carbon content of 95%, a tensile modulus of 500GPa, and a density of 1.75g/cm3The monofilament diameter was 7 μm.
Carbon nanotube: the carboxylated multi-walled carbon nanotube prepared by adopting a CVD method by Jiangsu Xiancheng nano material science and technology limited company has the length of 0.5-2 mu m, the carboxyl content of 3.86wt percent and the density of 2.1g/cm3Tap density of 0.27g/cm3And the diameter is 5-15 nm.
Cement: 42.5 grade common portland cement of Shaanxi copper phoenix building materials, with specific surface area of 360m2Kg, density 3.05g/cm3The 28d compressive strength is 46.2MPa, and the 28d flexural strength is 8.6 MPa.
Sand: clean river sand with fineness modulus of 2.62 (medium sand) and apparent density of 2620kg/m3Bulk density 1450kg/m3The mud content was 1.1%.
Deionized water: the first-grade deionized water provided by the south China high-tech water treatment equipment company Limited is analytically pure and has the pH value of 6.5-7.5.
Water: common tap water supplied in the city of west ampere.
Acetone, absolute ethyl alcohol: all are chemically pure.
Water reducing agent: the standard polycarboxylic acid high-performance water reducing agent produced by the lake south China rock building material science and technology limited company has the appearance of viscous colorless transparent liquid, the water reducing rate of 25 percent, the gas content of 3.4 percent and the doping amount of 1 percent of the mass of cement.
Defoaming agent: the W-803 tributyl phosphate defoamer produced by new materials Limited in Guangzhou is colorless transparent liquid with the content of 99.7 percent and the mixing amount of 0.2 percent of the mass of the cement.
Dispersing agent: methylcellulose, pure by chemical analysis, white powder, density 1.3g/cm3(micron-sized carbon fibers are dispersed, and the mixing amount is 0.4 percent of the mass of the cement). Cetyl trimethyl ammonium bromide, chemically pure, white powder (dispersed nanoscale carbon nanotubes).
Example 4
The difference between example 4 and example 2 is only that the weight part of the micro-nano hierarchical trans-scale fiber is adjusted to 1.76 parts, except that the steps of the method are the same.
Example 5
The difference between example 5 and example 2 is only that the weight part of the micro-nano hierarchical trans-scale fiber is adjusted to 3.52 parts, except that the steps of the method are the same.
Comparative example 1
Compared with the embodiment 2, the comparative example 1 only differs from the embodiment 2 in that micro-nano graded trans-scale fiber components are omitted, and the steps of the method are the same except that the steps are the same.
In order to compare the effects of the invention, the performance of the mortars prepared in the embodiment 2, the embodiment 4, the embodiment 5 and the comparative embodiment 1 is tested, the materials of other raw materials are kept unchanged, the prepared mortars are prepared into test pieces, and then an electro-hydraulic servo universal testing machine is adopted to test the static compressive strength of the test pieces; and (3) carrying out an impact compression test (the impact air pressure is 0.4MPa) on the mortar test piece by adopting a Separated Hopkinson Pressure Bar (SHPB), so as to obtain the dynamic compressive strength of the mortar test piece. Specific comparative data are shown in table 1 below:
TABLE 1
As can be seen from the above table 1, the static and dynamic compressive strengths of the mortar test piece are improved to a greater extent than those of the test piece without the cross-scale fibers.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention, and the present invention is not limited to the illustrated embodiments, and all the modifications and equivalents of the embodiments may be made without departing from the spirit of the present invention.
Claims (7)
1. The carbon-based micro-nano graded trans-scale fiber reinforced cement mortar is characterized by being prepared from the following substances in parts by weight:
1-4 parts of micro-nano graded trans-scale fiber, 700-800 parts of cement, 1200-1300 parts of sand, 7-8 parts of water reducing agent, 1-2 parts of defoaming agent, 3-4 parts of dispersing agent and 220-240 parts of water.
2. The carbon-based micro-nano graded trans-scale fiber reinforced cement mortar according to claim 1 is characterized by being prepared from the following substances in parts by weight:
2.64 parts of micro-nano graded trans-scale fiber, 766 parts of cement, 1280 parts of sand, 7.66 parts of water reducing agent, 1.53 parts of defoaming agent, 3.06 parts of dispersing agent and 230 parts of water.
3. The carbon-based micro-nano graded cross-scale fiber reinforced cement mortar according to claim 1 or 2, characterized in that the preparation method of the micro-nano graded cross-scale fiber comprises the following steps:
(1) carbon fiber desizing treatment;
based on a Soxhlet extraction method, extracting carbon fiber tows by using acetone, removing a sizing agent on the surfaces of the carbon fiber tows, taking out the carbon fibers after 48 hours, then putting the carbon fibers into absolute ethyl alcohol to clean for three times, then putting the carbon fibers into deionized water to clean for three times, and finally putting the carbon fibers into a constant-temperature drying oven to dry for later use.
(2) Preparing a carbon nano tube dispersion liquid;
correspondingly mixing the carbon nano tube with a hexadecyl trimethyl ammonium bromide solution according to the weight-volume ratio of 0.75g to 500mL, and performing ultrasonic treatment for 1.5h to obtain a carbon nano tube dispersion liquid for later use;
(3) preparing micro-nano graded cross-scale fibers:
and (3) pouring the carbon nanotube dispersion liquid prepared in the step (2) into an electrophoresis tank, and performing electrophoretic deposition by taking the stainless steel sheet and the carbon fiber treated in the step (1) as two electrodes respectively, wherein the electrophoretic deposition can be performed for 1 hour.
4. The carbon-based micro-nano graded trans-scale fiber reinforced cement mortar of claim 3, wherein the temperature in the drying oven in the step (1) is controlled to be 60 ℃.
5. The carbon-based micro-nano graded trans-scale fiber reinforced cement mortar of claim 3, wherein the concentration of the cetyl trimethyl ammonium bromide solution in the step (2) is 0.00092 mol/L; the power of the ultrasonic treatment was controlled to 200W.
6. The carbon-based micro-nano graded trans-scale fiber reinforced cement mortar according to claim 3, characterized in that before the carbon fibers are used as electrodes in the step (3), the carbon fibers are firstly bundled and then used; the distance between the stainless steel sheet and the carbon fiber is controlled to be 2 cm; the voltage during the electrophoresis treatment was controlled to 60V.
7. A preparation method of carbon series micro-nano graded trans-scale fiber reinforced cement mortar is characterized by comprising the following steps:
s1, weighing the micro-nano graded trans-scale fiber, cement, sand, a water reducing agent, a defoaming agent, a dispersing agent and water according to the corresponding weight parts for later use;
s2, mixing half of water in parts by weight with the micro-nano graded trans-scale fiber and the dispersing agent together, and performing ultrasonic dispersion uniformly to obtain a fiber water dispersion for later use;
s3, mixing the remaining half of water, the water reducing agent and the defoaming agent together, and uniformly stirring to obtain a mixture for later use;
s4, mixing the cement and the sand together, and putting the mixture into a stirrer for dry stirring for 2 min;
and S5, putting the fiber aqueous dispersion prepared in the step S2 and the mixture prepared in the step S3 into the stirrer treated in the step S4, stirring for 3-6 min, and taking out to obtain the finished cement mortar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110357476.0A CN113045254A (en) | 2021-04-01 | 2021-04-01 | Carbon-series micro-nano graded trans-scale fiber reinforced cement mortar and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110357476.0A CN113045254A (en) | 2021-04-01 | 2021-04-01 | Carbon-series micro-nano graded trans-scale fiber reinforced cement mortar and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113045254A true CN113045254A (en) | 2021-06-29 |
Family
ID=76517544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110357476.0A Pending CN113045254A (en) | 2021-04-01 | 2021-04-01 | Carbon-series micro-nano graded trans-scale fiber reinforced cement mortar and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113045254A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7867468B1 (en) * | 2008-02-28 | 2011-01-11 | Carbon Solutions, Inc. | Multiscale carbon nanotube-fiber reinforcements for composites |
| CN109265915A (en) * | 2018-07-12 | 2019-01-25 | 凌云工业股份有限公司上海凌云汽车研发分公司 | The preparation method of carbon nanotube enhancing carbon fiber thermal thermosetting resin based composites |
| CN111662025A (en) * | 2020-06-04 | 2020-09-15 | 河海大学 | Preparation method and application of carbon nanotube grafted carbon fiber multi-scale reinforcement |
| CN112110697A (en) * | 2020-09-08 | 2020-12-22 | 中国人民解放军空军工程大学 | Method for improving dynamic property of concrete by applying multi-scale fiber structure |
-
2021
- 2021-04-01 CN CN202110357476.0A patent/CN113045254A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7867468B1 (en) * | 2008-02-28 | 2011-01-11 | Carbon Solutions, Inc. | Multiscale carbon nanotube-fiber reinforcements for composites |
| CN109265915A (en) * | 2018-07-12 | 2019-01-25 | 凌云工业股份有限公司上海凌云汽车研发分公司 | The preparation method of carbon nanotube enhancing carbon fiber thermal thermosetting resin based composites |
| CN111662025A (en) * | 2020-06-04 | 2020-09-15 | 河海大学 | Preparation method and application of carbon nanotube grafted carbon fiber multi-scale reinforcement |
| CN112110697A (en) * | 2020-09-08 | 2020-12-22 | 中国人民解放军空军工程大学 | Method for improving dynamic property of concrete by applying multi-scale fiber structure |
Non-Patent Citations (1)
| Title |
|---|
| 阿诺娜: ""碳纳米管-碳纤维多尺度增强体的制备及性能研究", 《中国优秀硕士学位论文全文数据库工程科技Ⅰ辑》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Rui et al. | Comparative study on the effect of steel and polyoxymethylene fibers on the characteristics of Ultra-High Performance Concrete (UHPC) | |
| Deng et al. | Preparation and piezoresistive properties of carbon fiber-reinforced alkali-activated fly ash/slag mortar | |
| Zhu et al. | Evaluation of carbon fiber dispersion in cement-based materials using mechanical properties, conductivity, mass variation coefficient, and microstructure | |
| CN104446176A (en) | Cement-based composite material and pressure sensor made of same | |
| Song et al. | Synergistic effect of latex powder and rubber on the properties of oil well cement-based composites | |
| CN103058541A (en) | Application of graphene oxide as reinforcing agent of cement early strength | |
| Li et al. | Electrophoretic deposition of nano-silica onto carbon fiber surfaces for an improved bond strength with cementitious matrices | |
| CN112521091B (en) | Modified graphene modified cement-based composite material and preparation method thereof | |
| CN106431131A (en) | Preparation method of fiber-reinforced cement based composite material with high toughness and high damping | |
| Han et al. | Multiscale carbon nanosphere–carbon fiber reinforcement for cement-based composites with enhanced high-temperature resistance | |
| CN111138136A (en) | Anti-cracking cement | |
| CN105645847A (en) | Carbon nanotube/carbon fiber-reinforced cement-based pressure-sensitive composite material and preparation method thereof | |
| Qiao et al. | Corrosion behavior of a steel bar embedded in a cement-based conductive composite | |
| Li et al. | The effect of graphene oxide grafted carbon fiber on mechanical properties of class G Portland cement | |
| Yu et al. | Enhancing the mechanical and functional performance of carbon fiber reinforced cement mortar by the inclusion of a cost-effective graphene nanofluid additive | |
| Liu et al. | Mechanical and self-sensing properties of multiwalled carbon nanotube-reinforced ECCs | |
| CN113912374B (en) | Powder 3D printing high-strength high-toughness cement-based material and preparation method thereof | |
| Ge et al. | The effect of the addition of graphene nanoplatelets on the selected properties of cementitious composites | |
| Zhang et al. | Improved output voltage of 0–3 cementitious piezoelectric composites with basalt fibers | |
| Li et al. | Mechanical properties of engineered geopolymer composite with graphene nanoplatelet | |
| Qin et al. | Mechanical properties and durability of fiber reinforced geopolymer composites: A review on recent progress | |
| Bashir et al. | Aspect ratio effect of multi-walled carbon nanotubes and carbon fibers on high-performance cement mortar matrices | |
| CN113045254A (en) | Carbon-series micro-nano graded trans-scale fiber reinforced cement mortar and preparation method thereof | |
| Wang et al. | Synthesis and properties of carbon nanofibers filled cement-based composites combined with new surfactant methylcellulose | |
| Khushnood et al. | Theoretical and experimental analysis of multifunctional high performance cement mortar matrices reinforced with varying lengths of carbon fibers |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210629 |