CN114907043A - Plant fiber interface strengthening method for toughening and cracking resistance of concrete - Google Patents
Plant fiber interface strengthening method for toughening and cracking resistance of concrete Download PDFInfo
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- CN114907043A CN114907043A CN202210563268.0A CN202210563268A CN114907043A CN 114907043 A CN114907043 A CN 114907043A CN 202210563268 A CN202210563268 A CN 202210563268A CN 114907043 A CN114907043 A CN 114907043A
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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
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
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- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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Abstract
The invention belongs to the technical field of concrete, and particularly provides a plant fiber interface strengthening method for toughening and cracking resistance of concrete, which comprises the following steps: 1) soaking plant fiber in alkali liquor; 2) sequentially adding an organic solvent and a silicon source into the soaked plant fiber and uniformly mixing to obtain a solution A; 3) adding the first solution into the solution A to obtain a solution B; 4) adding the second solution into the solution B to obtain a solution C; 5) and (3) stirring the solution C, taking out the plant fiber from the stirred solution, cleaning the taken-out plant fiber and drying. The invention solves the problem of poor bonding property between the existing plant fiber and the concrete matrix, and the invention enables the surface of the plant fiber to deposit the nano silicon dioxide, thereby enhancing the interface bonding between the plant fiber and the concrete matrix and improving the utilization rate of the plant fiber and the nano silicon dioxide.
Description
Technical Field
The invention belongs to the technical field of concrete, and particularly relates to a plant fiber interface strengthening method for toughening and cracking resistance of concrete.
Background
The ultra-high performance concrete is the most innovative concrete in the last thirty years, has ultra-high mechanical property and excellent durability, and has wide application prospect in the fields of civil buildings, long-span bridges, municipal engineering, ocean engineering and military protection. The ultra-high performance concrete usually adopts a low water-cement ratio and a large amount of cementing materials (cement and silica fume), so that the concrete can generate large self-shrinkage, the concrete can crack at an early stage, and the mechanical property and the long-term durability of the concrete are greatly reduced. At present, shrinkage reducing agents, expanding agents, super absorbent resins and other shrinkage reducing materials are often added into the ultrahigh-performance concrete to reduce self-shrinkage, but the shrinkage reducing materials are expensive, consume a large amount of natural resources and discharge greenhouse gases in the production and manufacturing process, greatly increase the total manufacturing cost and carbon emission of the ultrahigh-performance concrete, and do not meet the strategic requirements of national sustainable development. The plant fiber is a renewable natural resource with low price and low carbon footprint, and researches indicate that the plant fiber can greatly reduce the self-shrinkage of the ultra-high performance concrete and improve the macroscopic mechanical property of the ultra-high performance concrete, but the bonding property between the plant fiber and the concrete matrix is poor, and the whole reinforcing effect of the plant fiber is difficult to exert. The incorporation of nanomaterials (e.g., nanosilica, nanocalcium carbonate, carbon nanotubes and graphene) into the matrix to improve the bonding of the fibers to the concrete matrix is currently favored by a wide range of researchers, mainly because nanomaterials promote the hydration of the cement and consume calcium hydroxide to form a volume-expanded hydrated calcium silicate gel. However, the dispersion of the nanomaterial generally requires a complicated process and is highly susceptible to the agglomeration phenomenon, which causes the strength of the concrete to be lowered. In addition, the nanomaterial is often used for indirectly enhancing the bonding performance between the fiber and the matrix by reducing the porosity of the matrix and improving the strength of the matrix, so that the utilization rate of the expensive nanomaterial is low.
Chinese patent documents with publication number CN101705736A and publication date of 2010, 5 months and 12 days disclose a ceramsite concrete light partition board and a preparation method thereof, and the ceramsite concrete light partition board is characterized in that: the components of the ceramsite are coarse ceramsite (phi 0.5-1.0cm), medium ceramsite (phi 0.3-0.5cm), ceramsite powder (phi less than 0.3 cm), cement and a water reducing agent; the composition comprises (by weight) coarse ceramsite (phi 0.5-1.0cm) 39-51%, medium ceramsite (phi 0.3-0.5cm) 7.8-17.2%, ceramsite powder (phi less than 0.3 cm) 15.6-25.8%, cement 13-21%, and water reducing agent 0.5-1.7%. The partition board solves the problems that the partition boards widely used in the building at present, such as a plant fiber reinforced board, a steam-added cement board, a slag coal ash board, a fly ash stone cement board, a gypsum board and the like, have high water absorption rate, are easy to age and crack, have short service life, are easy to deform in cold and heat, cannot be nailed, drilled and transversely and longitudinally threaded, have low integral structure strength, low impact and bending resistance loads and the like, and is suitable for being used as a non-bearing partition board in the building. However, the document does not solve the problem of poor adhesion between the plant fibers and the concrete matrix.
Disclosure of Invention
The invention provides a plant fiber interface strengthening method for toughening and cracking resistance of concrete, and aims to solve the problem of poor bonding property between plant fiber and a concrete matrix in the prior art.
Therefore, the invention provides a plant fiber interface strengthening method for toughening and cracking resistance of concrete, which comprises the following steps:
1) soaking plant fiber in alkali liquor;
2) sequentially adding an organic solvent and a silicon source into the soaked plant fiber and uniformly mixing to obtain a solution A;
3) adding the first solution into the solution A to obtain a solution B;
4) adding the second solution into the solution B to obtain a solution C;
5) and (3) stirring the solution C, taking out the plant fiber from the stirred solution, cleaning the taken-out plant fiber and drying.
Preferably, the plant fiber is sisal fiber.
Preferably, the alkali liquor is 4.0 wt% to 8.0 wt% sodium hydroxide solution.
Preferably, the organic solvent is absolute ethyl alcohol.
Preferably, the silicon source is tetraethoxysilane.
Preferably, the first solution consists of deionized water and absolute ethyl alcohol according to the volume ratio of 1-3: 5-15.
Preferably, the second solution consists of absolute ethyl alcohol and ammonia water according to the volume ratio of 3-7: 1-3.
Preferably, the volume ratio of the organic solvent, the plant fiber, the silicon source, the first solution and the second solution is 15-40:0.5-1.5:0.5-1.5:8-16: 4-10.
Preferably, the solution C in the step 5) needs to be stirred in a constant-temperature magnetic stirrer at constant temperature.
Preferably, the temperature during constant-temperature stirring is 30-50 ℃.
The invention has the beneficial effects that:
1. according to the plant fiber interface strengthening method for toughening and cracking resistance of concrete, provided by the invention, the nano silicon dioxide is deposited on the surface of the plant fiber by the method, so that the interface bonding between the plant fiber and the concrete matrix is enhanced, and the utilization rate of the plant fiber and the nano silicon dioxide is improved.
2. According to the plant fiber interface strengthening method for toughening and cracking resistance of concrete, provided by the invention, the plant fiber is sisal fiber, and the sisal fiber is widely distributed in China, is low in price, is easy to obtain and is low in cost.
3. Compared with the traditional method of directly doping the nano material into the matrix, the plant fiber interface strengthening method for toughening and cracking the concrete can save the complex process of dispersing the nano material and avoid the occurrence of the agglomeration phenomenon of the nano material.
Drawings
The present invention will be described in further detail below with reference to the accompanying drawings.
FIG. 1 is a flow chart of a plant fiber interface strengthening method for concrete toughening and crack resistance;
FIG. 2 is the surface microstructure of the fiber after the deposition of the nanosilica of example 1;
FIG. 3 is a bar graph of the bond strength and pull energy between the fibers and the concrete matrix of example 1;
FIG. 4 is a graph of the macro-mechanical properties of the fiber reinforced concrete test pieces of example 1;
FIG. 5 is a graph showing the effect of the fibers of example 1 on the reduction of self-shrinkage.
Detailed Description
As shown in fig. 1, a plant fiber interface strengthening method for concrete toughening and crack resistance comprises the following steps:
1) soaking plant fiber in alkali liquor;
2) sequentially adding an organic solvent and a silicon source into the soaked plant fiber and uniformly mixing to obtain a solution A;
3) adding the first solution into the solution A to obtain a solution B;
4) adding the second solution into the solution B to obtain a solution C;
5) and (3) stirring the solution C, taking out the plant fiber from the stirred solution, cleaning the taken-out plant fiber and drying. And drying in a drying mode.
The method enables the nano silicon dioxide to be deposited on the surface of the plant fiber, so that the interface bonding between the plant fiber and the concrete matrix is enhanced, and the utilization rate of the plant fiber and the nano silicon dioxide is improved. Compared with the prior method of directly doping the nano material in the matrix, the method can save the complex process of dispersing the nano material and avoid the occurrence of the agglomeration phenomenon of the nano material, and has simple principle, safe and convenient operation process and easy popularization.
Preferably, the plant fiber is sisal fiber. The sisal fibers are widely distributed in China, are low in price, are easy to obtain and are low in cost.
Preferably, the alkali liquor is 4.0 wt% to 8.0 wt% sodium hydroxide solution. 4.0 wt% -8.0 wt% of sodium hydroxide solution removes impurities on the surface of sisal fibers, and more hydroxyl groups are exposed to facilitate deposition of nanoparticles.
Preferably, the organic solvent is absolute ethyl alcohol. The anhydrous ethanol can promote the hydrolysis of the tetraethoxysilane.
Preferably, the silicon source is tetraethoxysilane. The tetraethoxysilane can promote the growth of the nano silicon dioxide particles on the surface of the fiber when hydrolysis and condensation reactions occur.
Preferably, the first solution consists of deionized water and absolute ethyl alcohol according to the volume ratio of 1-3: 5-15. Can provide water source for hydrolyzing the tetraethoxysilane.
Preferably, the second solution consists of absolute ethyl alcohol and ammonia water according to the volume ratio of 3-7: 1-3. The hydrolysis of the ethyl orthosilicate is accelerated by the catalytic action of ammonia water.
Preferably, the volume ratio of the organic solvent, the plant fiber, the silicon source, the first solution and the second solution is 15-40:0.5-1.5:0.5-1.5:8-16: 4-10.
Preferably, the solution C in the step 5) needs to be stirred in a constant-temperature magnetic stirrer at constant temperature.
Compared with a common stirrer, the constant-temperature magnetic stirrer has the characteristics of high sensitivity, strong controllability and wide temperature control range.
Preferably, the temperature during constant-temperature stirring is 30-50 ℃.
The tetraethoxysilane fully undergoes hydrolysis and condensation reaction at the temperature of 30-50 ℃, thereby promoting the growth of the nano silicon dioxide particles on the surface of the fiber.
The general reaction formula of the hydrolysis polycondensation reaction of the ethyl orthosilicate is as follows:
Si(OCH 2 CH 3 ) 4 +2H 2 O＝SiO 2 +4C 2 H 5 OH
preferably, after the second solution is added into the solution B, the mixed solution is subjected to ultrasonic treatment to obtain a solution C.
The ultrasound is beneficial to accelerating the hydrolysis of the tetraethoxysilane.
Preferably, the step 2) is uniformly mixed by adopting an ultrasonic treatment mode. The ultrasonic treatment is beneficial to accelerating the mixing speed of the tetraethoxysilane and the ethanol solution.
Preferably, the frequency of the ultrasonic treatment is 30-60 kHz.
Preferably, the drying temperature is 50-70 ℃.
Example 1:
a plant fiber interface strengthening method for toughening and cracking resistance of concrete is characterized by comprising the following steps: the method comprises the following steps:
1) soaking sisal fibers in 6.0 wt% of sodium hydroxide solution for 4 hours;
2) sequentially adding 30.0ml of absolute ethyl alcohol and 1.0ml of ethyl orthosilicate into 1g of soaked sisal fibers, and putting the mixture into an ultrasonic cleaner for ultrasonic treatment (40kHz) for 10min to obtain a solution A;
3) adding the first solution into the solution A to obtain a solution B; the first solution is a mixed solution of 2.0ml of deionized water and 10.0ml of absolute ethyl alcohol;
4) adding the second solution into the solution B, and then carrying out ultrasonic treatment (40kHz) for 10min to obtain a solution C; the second solution is a mixed solution of 5.0ml of absolute ethyl alcohol and 2.0ml of ammonia water;
5) and putting the solution C into a heat collection type constant temperature heating magnetic stirrer, magnetically stirring for 11h at the rotating speed of 400rpm at the temperature of 40 ℃, taking out the plant fibers from the stirred solution, cleaning the taken out plant fibers, and drying at the temperature of 60 ℃.
The nanosilica-deposited fiber (plant fiber) obtained in example 1 was subjected to a gold spraying treatment, and then the microstructure of the fiber surface was observed by a field emission scanning electron microscope (Merlin Compact), as shown in fig. 2. As can be seen from FIG. 2, a large number of spherical nano silica particles are attached to the surface of the fiber (plant fiber), and the successful deposition of nano silica on the surface of the fiber is demonstrated by the technology, and the diameter of the deposited nano particles is 138.3 + -11 nm through the statistical analysis of the particle size. In addition, in order to verify the strengthening effect of the technology on the interface between the plant fiber and the concrete, the bonding performance between the sisal fiber and the ultra-high performance concrete matrix, the macroscopic mechanical property of the sisal fiber reinforced ultra-high performance concrete and the self-shrinkage are respectively tested, and the test results are respectively shown in fig. 3, fig. 4 and fig. 5.
As can be seen from FIG. 3, the bonding strength and the drawing energy between the fiber and the matrix after the nano silica particles are deposited are respectively improved by 28.0% and 40.8% compared with those of the untreated fiber, which shows that the technique can effectively strengthen the interface between the fiber and the concrete matrix, because the deposited nano silica particles can react with calcium hydroxide around the fiber to generate a volume-expanded calcium silicate hydrate gel, and the enrichment and the directional arrangement of the calcium hydroxide at the interface are reduced. The result of the macroscopic mechanical property test is shown in fig. 4, and similarly, the compressive strength of the test piece after the nano silicon dioxide is deposited is improved by 13.0 percent compared with that of the untreated fiber reinforced concrete test piece; from fig. 4(b), it can be seen that the toughness of the concrete doped with untreated sisal fibers is improved by 58.0% compared with that of the plain concrete, indicating that sisal fibers can play a significant toughening effect. In addition, compared with plain concrete, the toughness of the concrete doped with the deposited nano-silica fiber is improved by 122.0 percent, which shows that the toughening effect of the fiber on the concrete is further improved by the reinforcement of the interface of the fiber and the matrix; FIG. 5 is a graph showing the effect of incorporating sisal fibers on the reduction of self-shrinkage of ultra-high performance concrete, and it can be seen that incorporating sisal fibers in an amount of 1.5% by volume reduces the self-shrinkage by 71.4%.
Example 2:
a plant fiber interface strengthening method for toughening and cracking resistance of concrete is characterized by comprising the following steps: the method comprises the following steps:
1) soaking sisal fibers in 4.0 wt% of sodium hydroxide solution for 6 hours;
2) sequentially adding 40.0ml of absolute ethyl alcohol and 0.5ml of tetraethoxysilane into 0.5g of soaked sisal fibers, and putting the mixture into an ultrasonic cleaner for ultrasonic treatment (30kHz) for 15min to obtain a solution A;
3) adding the first solution into the solution A to obtain a solution B; the first solution is a mixed solution of 3.0ml of deionized water and 5.0ml of absolute ethyl alcohol;
4) adding the second solution into the solution B, and then carrying out ultrasonic treatment (30kHz) for 15min to obtain a solution C; the second solution is a mixed solution of 3.0ml of absolute ethyl alcohol and 1.0ml of ammonia water;
5) and putting the solution C into a heat collection type constant temperature heating magnetic stirrer, magnetically stirring for 12 hours at the rotating speed of 500rpm at the temperature of 30 ℃, taking out the plant fiber from the stirred solution, cleaning the taken-out plant fiber, and drying at the temperature of 50 ℃.
The microstructure of the fiber surface was observed by a field emission scanning electron microscope (Merlin Compact) after the nano-silica deposition fiber (plant fiber) obtained in example 2 was subjected to the au spraying treatment, and it was found that a large amount of spherical nano-silica particles were attached to the fiber (plant fiber) surface, and it was confirmed that the nano-silica was successfully deposited on the fiber surface by the technique, and the diameter of the deposited nano-particles was 138.3 ± 11nm by statistical analysis of the particle size. In addition, in order to verify the strengthening effect of the technology on the interface of the plant fiber and the concrete, the bonding performance between the sisal fiber and the ultra-high performance concrete matrix, the macroscopic mechanical property of the sisal fiber reinforced ultra-high performance concrete and the self-shrinkage are respectively tested, and the test results show that the bonding strength and the drawing energy between the fiber and the matrix after the nano silicon dioxide particles are deposited are respectively improved by 27.0% and 40.1% compared with the untreated fiber, which indicates that the technology can effectively strengthen the interface between the fiber and the concrete matrix, because the deposited nano silicon dioxide particles can react with calcium hydroxide around the fiber to generate the hydrated calcium silicate gel with expanded volume, and the enrichment and the directional arrangement of the calcium hydroxide at the interface are reduced. According to the result of macroscopic mechanical property test, the compressive strength of the test piece after the nano silicon dioxide is deposited is improved by 12.0 percent compared with that of an untreated fiber reinforced concrete test piece; compared with plain concrete, the toughness of the concrete doped with the untreated sisal fibers is improved by 57.0 percent, which shows that the sisal fibers can play a remarkable toughening effect. In addition, compared with plain concrete, the toughness of the concrete doped with the deposited nano-silica fiber is improved by 120.0 percent, which shows that the toughening effect of the fiber on the concrete is further improved by the reinforcement of the interface of the fiber and the matrix; from the effect of reducing the self-shrinkage of the ultrahigh-performance concrete after the sisal fibers are doped, the self-shrinkage is reduced by 70.3 percent after the sisal fibers with the volume of 1.5 percent are doped.
Example 3:
a plant fiber interface strengthening method for toughening and cracking resistance of concrete is characterized by comprising the following steps: the method comprises the following steps:
1) soaking sisal fibers in 8.0 wt% of sodium hydroxide solution for 3 hours;
2) sequentially adding 15.0ml of absolute ethyl alcohol and 1.5ml of ethyl orthosilicate into 1.5g of soaked sisal fibers, and putting the mixture into an ultrasonic cleaner for ultrasonic treatment (60kHz) for 5min to obtain a solution A;
3) adding the first solution into the solution A to obtain a solution B; the first solution is a mixed solution of 1.0ml of deionized water and 15.0ml of absolute ethyl alcohol;
4) adding the second solution into the solution B, and then carrying out ultrasonic treatment (60kHz) for 5min to obtain a solution C; the second solution is a mixed solution of 7.0ml of absolute ethyl alcohol and 3.0ml of ammonia water;
5) and putting the solution C into a heat collection type constant temperature heating magnetic stirrer, magnetically stirring for 10 hours at the rotating speed of 300rpm at the temperature of 50 ℃, taking out the plant fiber from the stirred solution, cleaning the taken-out plant fiber, and drying at the temperature of 70 ℃.
The microstructure of the fiber surface was observed by a field emission scanning electron microscope (Merlin Compact) after the nano-silica deposition fiber (plant fiber) obtained in example 3 was subjected to the au spraying treatment, and it was found that a large amount of spherical nano-silica particles were attached to the fiber (plant fiber) surface, and it was confirmed that the nano-silica was successfully deposited on the fiber surface by the technique, and the diameter of the deposited nano-particles was 138.3 ± 11nm by statistical analysis of the particle size. In addition, in order to verify the strengthening effect of the technology on the interface of the plant fiber and the concrete, the bonding performance between the sisal fiber and the ultra-high performance concrete matrix, the macroscopic mechanical property of the sisal fiber reinforced ultra-high performance concrete and the self-shrinkage are respectively tested, and the test results show that the bonding strength and the drawing energy between the fiber and the matrix after the nano silicon dioxide particles are deposited are respectively improved by 26.0% and 39.8% compared with the untreated fiber, which indicates that the technology can effectively strengthen the interface between the fiber and the concrete matrix, because the deposited nano silicon dioxide particles can react with calcium hydroxide around the fiber to generate the calcium silicate hydrate gel with expanded volume, and the enrichment and the directional arrangement of the calcium hydroxide at the interface are reduced. The result of macroscopic mechanical property test shows that the compressive strength of the test piece after the nano silicon dioxide is deposited is improved by 12.0 percent compared with that of an untreated fiber reinforced concrete test piece; compared with plain concrete, the toughness of the concrete doped with the untreated sisal fibers is improved by 56.0 percent, which shows that the sisal fibers can play a remarkable toughening effect. In addition, compared with plain concrete, the toughness of the concrete doped with the deposited nano-silica fiber is improved by 119.0 percent, which shows that the toughening effect of the fiber on the concrete is further improved by the reinforcement of the interface of the fiber and the matrix; from the effect of reducing the self-shrinkage of the ultrahigh-performance concrete after the sisal fibers are doped, the self-shrinkage is reduced by 70.1 percent after the sisal fibers with the volume of 1.5 percent are doped.
In the description of the present invention, it is to be understood that the terms "comprises" and "comprising," if any, are used in the sense of being interpreted as being based on the orientation or positional relationship shown in the drawings, and not as indicating or implying that the referenced device or element must have a particular orientation, configuration, or operation in a particular orientation.
The above examples are merely illustrative of the present invention and should not be construed as limiting the scope of the invention, which is intended to be covered by the claims and any design similar or equivalent to the scope of the invention.
Claims (10)
1. A plant fiber interface strengthening method for toughening and cracking resistance of concrete is characterized by comprising the following steps: the method comprises the following steps:
1) soaking plant fiber in alkali liquor;
2) sequentially adding an organic solvent and a silicon source into the soaked plant fiber and uniformly mixing to obtain a solution A;
3) adding the first solution into the solution A to obtain a solution B;
4) adding the second solution into the solution B to obtain a solution C;
5) and (3) stirring the solution C, taking out the plant fiber from the stirred solution, cleaning the taken-out plant fiber and drying.
2. The plant fiber interface strengthening method for concrete toughening and crack resistance according to claim 1, wherein: the plant fiber is sisal fiber.
3. The plant fiber interface strengthening method for concrete toughening and crack resistance according to claim 1, wherein: the alkali liquor is 4.0 wt% -8.0 wt% of sodium hydroxide solution.
4. The plant fiber interface strengthening method for concrete toughening and crack resistance according to claim 1, wherein: the organic solvent is absolute ethyl alcohol.
5. The plant fiber interface strengthening method for concrete toughening and crack resistance according to claim 1, wherein: the silicon source is tetraethoxysilane.
6. The plant fiber interface strengthening method for concrete toughening and crack resistance according to claim 1, wherein: the first solution is composed of deionized water and absolute ethyl alcohol according to the volume ratio of 1-3: 5-15.
7. The plant fiber interface strengthening method for concrete toughening and crack resistance according to claim 1, wherein: the second solution is composed of absolute ethyl alcohol and ammonia water according to the volume ratio of 3-7: 1-3.
8. The plant fiber interface strengthening method for concrete toughening and crack resistance according to claim 1, wherein: the volume ratio of the organic solvent, the plant fiber, the silicon source, the first solution and the second solution is 15-40:0.5-1.5:0.5-1.5:8-16: 4-10.
9. The plant fiber interface strengthening method for concrete toughening and crack resistance according to claim 1, wherein: and (3) stirring the solution C in the step 5) at a constant temperature in a constant-temperature magnetic stirrer.
10. The plant fiber interface strengthening method for concrete toughening and crack resistance according to claim 9, wherein: the temperature during constant-temperature stirring is 30-50 ℃.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113185214A (en) * | 2021-03-24 | 2021-07-30 | 湖南工程学院 | Self-compacting concrete based on ultrasonic oscillation technology and preparation method thereof |
| WO2021172975A1 (en) * | 2020-02-25 | 2021-09-02 | Edotco Group Sdn. Bhd. | Bamboo reinforced concrete, bamboo fiber reinforced concrete and a method of manufacturing thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021172975A1 (en) * | 2020-02-25 | 2021-09-02 | Edotco Group Sdn. Bhd. | Bamboo reinforced concrete, bamboo fiber reinforced concrete and a method of manufacturing thereof |
| CN113185214A (en) * | 2021-03-24 | 2021-07-30 | 湖南工程学院 | Self-compacting concrete based on ultrasonic oscillation technology and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 刘昌华等: "植物纤维预处理与降解方法研究", 《绿色科技》 * |
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