CN114853410A - Concrete with carbon fixing and oxygen releasing functions and preparation method thereof - Google Patents
Concrete with carbon fixing and oxygen releasing functions and preparation method thereof Download PDFInfo
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- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 67
- 239000001301 oxygen Substances 0.000 title claims abstract description 67
- 230000003578 releasing effect Effects 0.000 title claims abstract description 42
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 40
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 39
- 238000002360 preparation method Methods 0.000 title abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 59
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
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- 238000000034 method Methods 0.000 claims description 26
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- 229910010413 TiO 2 Inorganic materials 0.000 claims description 11
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- 230000000149 penetrating effect Effects 0.000 claims description 7
- 239000011398 Portland cement Substances 0.000 claims description 5
- 238000009775 high-speed stirring Methods 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 4
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- 238000005520 cutting process Methods 0.000 claims description 3
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- 238000007580 dry-mixing Methods 0.000 claims description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 14
- 230000000694 effects Effects 0.000 abstract description 13
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Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/20—Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to a concrete with carbon fixing and oxygen releasing functions and a preparation method thereof, wherein the concrete comprises a concrete body and optical fibers, wherein the optical fibers penetrate through the concrete body; wherein in the concrete body, used concrete material includes: 400-600 parts of cementing material, 8-12 parts of photoelectric material, 140-210 parts of water and 4-6 parts of admixture; the preparation method comprises the following steps: firstly, optical fibers are penetrated in through holes on the side walls of a groove-shaped mold and penetrate through a molding cavity of the mold; then mixing the photoelectric material, water and the additive to obtain a photoelectric material mixed solution; and mixing the photoelectric material mixed solution with a cementing material, adding the mixture into a forming cavity of a groove-shaped die, standing and forming, taking out, and curing to obtain the concrete. Compared with the prior art, the concrete provided by the invention has the functions of absorbing a certain amount of carbon dioxide and releasing a sufficient amount of oxygen, is expected to change the traditional understanding of human beings on the concrete, and is also expected to reduce the adverse effect of the application of the concrete on the atmospheric oxygen concentration.
Description
Technical Field
The invention belongs to the technical field of building materials, relates to concrete with carbon fixing and oxygen releasing functions and a preparation method thereof, and particularly relates to carbon fixing and oxygen releasing concrete based on a photoelectric effect and a preparation method thereof.
Background
Sunlight, air and water are three major factors on which human beings live, wherein air mainly refers to oxygen necessary for human respiration. It is well known that atmospheric oxygen is mainly derived from plant photosynthesis. In particular, about 70% of the oxygen in the atmosphere is derived from marine algae, about 18% is derived from forest plants, and about 12% is derived from other land plants. Currently, the concentration of oxygen in the atmosphere is constantly decreasing due to the heavy use of fossil fuels (consumption of oxygen, release of carbon dioxide), the drastic reduction of forest area, the gradual decrease of the pH of the ocean (aggravation of marine algae death), etc., which will have an adverse effect on human survival.
Meanwhile, the amount of concrete used worldwide has a tendency to increase year by year as a synthetic material that is the largest in use worldwide. Generally, concrete is prepared by mixing cement as a cementing material and sand and stone as aggregates with water in a certain proportion, and then stirring and curing the mixture. Modern concrete also contains other components such as admixture, additive, fiber, nano material and the like. As a general consensus, the construction industry is often considered to be a high energy and high emission industry due to the large amount of carbon dioxide emitted by cement production. Therefore, in order to effectively relieve the trend of the reduction of the atmospheric oxygen concentration and respond to the call of the double-carbon target of the country of '3060' on carbon reduction of buildings, the development of the green concrete with the functions of fixing carbon and releasing oxygen is of great significance.
Disclosure of Invention
The invention aims to provide concrete with carbon fixing and oxygen releasing functions and a preparation method thereof, which are used for relieving the trend of atmospheric oxygen concentration reduction and reducing carbon emission in the building industry.
A concrete with carbon fixing and oxygen releasing functions comprises a concrete body and optical fibers penetrating through the concrete body;
in the concrete body, the concrete material comprises the following components in parts by weight:
further, the optical fiber array is arranged in the concrete body.
Further, the distance d between adjacent optical fibers is 10-50mm, and the diameter of the optical fibers is (0.1-0.2) d.
Furthermore, the cementing material comprises Portland cement, and the photoelectric material comprises nano TiO 2 The additive comprises a water reducing agent; the optical fiber comprises a glass fiber.
Further, the nano TiO 2 Is rutile phase nano TiO 2 The particle diameter is 20-50nm, the specific surface area is 30-90m 2 A density of 3.5-4.0g/cm 3 。
A preparation method of concrete with carbon fixing and oxygen releasing functions comprises the following steps:
1) the optical fiber is arranged in the through hole of the side wall of the groove-shaped mould in a penetrating way and penetrates through the forming cavity of the mould;
2) mixing a photoelectric material, water and an additive to obtain a photoelectric material mixed solution; and mixing the photoelectric material mixed solution with a cementing material, adding the mixture into a forming cavity of a groove-shaped die, standing and forming, taking out, and curing to obtain the concrete.
Further, in step 1), the sidewall through holes include parallel holes opened in opposite sidewalls of the groove-shaped mold.
Further, in the step 1), two ends of the optical fiber extend out of the corresponding side wall through hole; and in the step 2), cutting and removing the two extending ends after the package is placed and formed.
Further, in the step 2), the mixing process among the photoelectric material, the water and the admixture sequentially comprises stirring and ultrasonic dispersion;
wherein the stirring speed is 60-90 rpm; the ultrasonic power is 400-800W, the ultrasonic frequency is 25-40Hz, and the ultrasonic time is 1-2 h;
the mixing process of the photoelectric material mixed solution and the cementing material sequentially comprises the low-speed dry mixing of the cementing material, and the low-speed stirring and the high-speed stirring of the photoelectric material mixed solution and the cementing material;
wherein the stirring speed of the low-speed dry stirring is 60-90rpm, and the stirring time is 1-2 min; the stirring speed of low-speed stirring is 60-90rpm, and the stirring time is 2-3 min; the stirring speed of the high-speed stirring is 120-150rpm, and the stirring time is 1-2 min.
Further, in the step 2), the maintenance is dark maintenance.
Compared with the prior art, the invention does not require to increase the use amount of concrete and does not introduce raw materials with high carbon emission. Thus, the use of a part or a large amount of the concrete according to the invention in the existing, large quantities does not lead to an increase in the carbon dioxide emissions from the production of the concrete. On the other hand, the concrete proposed by the present invention has the function of absorbing a certain amount of carbon dioxide and releasing a sufficient amount of oxygen. Therefore, the traditional understanding of human beings on concrete is expected to be changed, and the adverse effect of concrete application on atmospheric oxygen concentration is also expected to be reduced.
Drawings
FIG. 1 is a schematic flow chart of a method for preparing green concrete with carbon-fixing and oxygen-releasing functions in an embodiment.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
The design inspiration of the invention comes from photosynthesis of plants, namely, the plants consume carbon dioxide and release oxygen through the processes of primary reaction, electron transfer, photosynthetic phosphorylation, carbon assimilation and the like.
Preferably, the key step of the above process is photochemical reaction in the initial reaction, i.e. photoelectric effect, and the equation is shown in formula (1):
D·P·A→D·P * ·A→D·P + ·A - →D + ·P·A - (1)
wherein P is chlorophyll a pair, P * Is an excited state of P, P + Is the oxidation state of P; d is an electron donor, D + Is the oxidation state of D; a is an electron acceptor, A - Is A ofIn a reduced state.
More preferably, the chlorophyll a pair continuously undergoes oxidation-reduction reaction by photoelectric effect (simplified as shown in formula (2)), electrolyzes water for chloroplast, and further releases oxygen to transfer electrons.
Preferably, in the normal use process, the concrete and carbon dioxide in the air are subjected to chemical reaction, and the equation is shown as formula (3), which shows that the concrete has the carbon sequestration function and natural advantages.
Therefore, the principle of the photoelectric effect is applied to the concrete, so that the concrete can realize water electrolysis and further release oxygen, and the concrete has the functions of photosynthesis and carbon fixation and oxygen release.
The purpose of the invention can be realized by the following technical scheme:
a concrete with carbon fixing and oxygen releasing functions comprises a concrete body and optical fibers penetrating through the concrete body;
in the concrete body, the concrete material comprises the following components in parts by weight:
a preparation method of concrete with carbon fixing and oxygen releasing functions comprises the following steps:
s1: selecting a corresponding template form according to the building design requirement;
s2: and a side wall through hole is formed on the side wall of the groove-shaped mold in a penetrating way:
preferably, the side wall through holes are parallel holes symmetrically formed in the opposite side walls of the mold and are matched with the optical fiber in size (diameter and the like) so as to ensure that the optical fiber can pass through the parallel holes and penetrate through the forming cavity of the whole mold;
preferably, as an array opening method, the mold side wall is divided into a plurality of squares on average according to the size of the projection plane thereof, and an opening is made at the center of each square, which ensures uniform distribution of the optical fibers.
Further preferably, the side length of the square is 10-50mm, and the distance between the corresponding adjacent optical fibers is also preferably 10-50 mm. If the side length is less than 10mm, the distance between the optical fibers is also less than 10mm, so that the using amount of the optical fibers is obviously increased, and the preparation cost of the concrete is increased; if the side length is larger than 50mm, the distance between the optical fibers is also larger than 50mm, so that the light transmittance of the prepared concrete is greatly weakened, and the photoelectric effect of the concrete is weakened.
S3: the optical fiber passes through the parallel holes and penetrates through a forming cavity of the whole die;
the optical fiber is used for improving the light transmittance of concrete and providing continuous driving force, namely light energy, for realizing the photoelectric effect.
Preferably, the optical fiber comprises a glass fiber; meanwhile, the invention can also be applied to optical fibers which can meet the requirements of light-transmitting concrete on the market.
Preferably, the length of the optical fiber is not less than the distance between the corresponding parallel holes, so that the optical fiber has enough length to be fixed after penetrating through the forming cavity.
Preferably, the diameter of the optical fiber is 1/10-1/5 adjacent optical fiber spacing, if the diameter is too small, the manufacturing cost of the optical fiber is increased significantly, thereby leading to the increase of the preparation cost of concrete; if the diameter is too large, the volume of the template occupied by the optical fiber is obviously increased, so that the volume of cement and aggregate in the prepared concrete is obviously reduced, and the mechanical property of the concrete is obviously reduced.
Further preferably, the diameter of the optical fiber may be selected to be generally 1 to 5 mm.
S4: fixing the penetrated optical fiber on the side wall of the mold to prevent the optical fiber from slipping, falling off and even losing efficacy when pouring concrete;
preferably, the concrete designed by the invention does not influence the carbon fixing and oxygen releasing functions of the concrete, so that the fixing mode of the optical fiber on the mould can be any one of the existing fixing methods.
S5: selecting corresponding cement types and dosage according to the structural design requirements:
preferably, the cementitious material comprises portland cement. Further preferably, the concrete designed by the invention does not influence the carbon fixing and oxygen releasing functions of the concrete, so the invention does not limit the type and the dosage of the cement.
S6: selecting the total water consumption required by the concrete according to the target water-cement ratio; wherein the water-to-gel ratio can be defined as the mass ratio of water to cementitious material.
S7: according to the target fluidity, the dosage of an additive (water reducing agent) required by concrete is selected as follows:
the fluidity test is carried out according to the flow described in Standard test methods for the Performance of common concrete mixtures (GT/B50080-2016);
preferably, the water reducing agent is a polycarboxylate water reducing agent, and meanwhile, the water reducing agent which can effectively adjust the fluidity of concrete in the market can also be suitable for the invention.
S8: selecting proper photoelectric material types and contents according to the target oxygen release amount:
the photovoltaic material is the main medium for realizing the photovoltaic effect and must meet the following requirements: under the action of illumination, the reaction potential of the material should include a valence band interval of the chemical reaction shown in the formula (4), namely E VB Greater than 2V, E CB Less than 1V.
H 2 O-4e - →O 2 ↑ (4)
Preferably, the photoelectric material is a nano-scale photoelectric material; the use of the nano material can increase the content of cement hydration products, provide more reactants for the carbonization of the concrete in the normal use process and increase the carbon fixation effect of the concrete; meanwhile, the nano material can fully react with nano-scale water (such as interlayer water of gelled products) in concrete to release more oxygen.
Preferably, the photoelectric material comprises nano TiO 2 . Further preferably, the nano TiO 2 Is rutile phase nano TiO 2 The particle diameter is 20-50nm, the specific surface area is 30-90m 2 A density of 3.5-4.0g/cm 3 。
More preferably, the photoelectric material which can realize water electrolysis under illumination and meet the requirements on the market can also be suitable for the invention.
S9: placing the photoelectric material, water and a water reducing agent into a container, and fully stirring to obtain a photoelectric material mixed solution:
preferably, the stirring is carried out in a clockwise direction and is provided at a stirring speed of 60-90 revolutions per minute.
S10: after stirring, putting the mixed solution of the photoelectric material into an ultrasonic dispersion machine for ultrasonic treatment;
preferably, the present invention is not limited to the type of ultrasonic disperser, as all commercially available ultrasonic dispersers can meet the requirements of ultrasonic treatment.
The ultrasonic treatment conditions for successfully preparing the uniformly dispersed nano material mixed solution comprise: 400-800W of ultrasonic power, 25-40Hz of ultrasonic frequency and 1-2h of ultrasonic time. The uniformly dispersed nano material mixed solution is prepared in order to prevent the nano material mixed solution from aggregating in the concrete, and further prevent the nano material mixed solution from losing the functions of strengthening the carbon fixation effect and providing the photoelectric effect.
S11: mixing the photoelectric material mixed solution with a cementing material to obtain fresh concrete:
preferably, the blending process comprises: firstly, dry-stirring cement for 1-2 minutes at a stirring speed of 60-90 revolutions per minute; then, pouring the photoelectric material mixed solution, and slowly stirring for 2-3 minutes at a stirring speed of 60-90 revolutions per minute; finally, the rapid stirring is carried out for 1-2 minutes, and the stirring speed is 120-150 revolutions per minute.
S12: adding fresh concrete into a forming cavity of a mold, and wrapping the fresh concrete by using a preservative film;
s13: after standing and hardening, taking out the formed concrete, and cutting off redundant optical fibers to ensure that the surface of the concrete is smooth and flat;
s14: and continuously curing the formed concrete to obtain the green concrete with the functions of fixing carbon and releasing oxygen.
Preferably, since water is needed to participate in the hydration reaction of the cement in the early stage to provide strength to the formed concrete, the concrete curing processes contained in S12 and S14 should be protected from light, so as to prevent the phenomenon of insufficient water inside the early concrete due to the use of the optical fiber and the photoelectric material.
In order to test the carbon fixing and oxygen releasing performance of the concrete, after curing is finished, the cured and hardened concrete is taken out and carbon fixing amount and oxygen releasing amount are tested.
Preferably, the carbon fixation amount test refers to standard of test method for long-term performance and durability of ordinary concrete (GB/T50082-2009).
Preferably, the oxygen release amount test refers to "an in-situ detection device for oxygen concentration in concrete and a preparation and use method thereof" (CN 112595760A).
The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Example (b):
the preparation method of the green concrete with the carbon fixing and oxygen releasing functions, which is shown in figure 1, comprises the following steps:
the method comprises the following steps: selecting raw materials
P.O 42.5 grade ordinary portland cement is selected as a cementing material, and the material performance meets the relevant requirements of general portland cement (GB 175-2007).
As the optical fiber, a glass fiber having a diameter of 1mm and a length of 100mm was selected.
Selecting rutile phase nano TiO 2 White powder as photoelectric material with average particle diameter of 20nm and specific surface area of about 80m 2 G, density 3.9g/cm 3 (ii) a Under the action of illumination, nano TiO 2 E of (A) VB And E CB 2.91V and-0.29V, respectively, meet the requirements associated with S8 in the specific embodiment.
The polycarboxylic acid high-efficiency water reducing agent is selected as the additive, the water reducing efficiency is 20-25%, and the requirements related to the technical specification for concrete additive application (GB 50119-2003) are met.
Further, since the carbon fixing and oxygen releasing functions of the concrete designed by the invention are not affected, the invention is not limited to the cement type, the optical fiber type, the photoelectric material type and the water reducing agent type in the embodiment, except for the special requirements in the invention content. It is to be understood that each of the types mentioned herein is merely for the purpose of explaining the present invention in more detail and more specifically and is not intended to limit the present invention.
Step two: making template and fiber installation
Making a template
The 2 pieces of upright panels with the size of 120mm multiplied by 10mm, the 2 pieces of side upright panels with the size of 10mm multiplied by 100mm multiplied by 10mm, and the 1 piece of bottom panel with the size of 100mm multiplied by 10mm multiplied by 20mm are assembled, and the finished product space size is 100mm multiplied by 10mm, so as to be prepared for pouring common concrete and nano reinforced concrete.
Further, the concrete designed by the invention does not affect the function of fixing carbon and releasing oxygen, so the invention is not limited to the form and size of the formwork in the embodiment. It is to be understood that the template form and dimensions mentioned herein are merely for the purpose of more specifically and more particularly explaining the present invention and are not intended to limit the present invention.
According to the principle of equal division, 100 small squares with the size of 10mm × 10mm are respectively drawn on the front and back 2 upright panels of the finished product.
Furthermore, since the size of the square is related to the distance between the glass fibers, the side length of the small square is generally selected to be 10-50mm, and all the small squares in this embodiment are 10mm, in order to effectively improve the light transmittance of the concrete. It should be understood that other spacing of the glass fibers may also improve the light transmission of the concrete, and thus other dimensions of the squares are also within the scope of the present invention.
And drilling a hole with the diameter of 1mm at the center of each small square of the front and rear vertical surfaces of the finished product for pouring the fiber reinforced concrete and the carbon-fixing oxygen-releasing concrete.
Further, the pore size should be consistent with the diameter of the glass fiber.
It should be noted that at the end of this step, 4 parts of formwork will be obtained, 2 parts being (front and rear uprights) non-perforated formwork and 2 parts being (front and rear uprights) perforated formwork.
Mounting fiber
The glass fiber with the diameter of 1mm and the length of 100mm corresponds to the holes on the template with the holes one by one, and the fiber penetrates through the template in sequence. After the penetration is finished, fixing the two ends of the glass fiber on the template by using a clamp for pouring the fiber reinforced concrete and the carbon-fixing oxygen-releasing concrete.
Step three: concrete mix proportion design
Examples 1 to 6 are ordinary concrete, nano-reinforced concrete, fiber-reinforced concrete and carbon-fixing oxygen-releasing concrete, respectively, wherein examples 4 to 6 correspond to the concrete with carbon-fixing oxygen-releasing function designed by the present invention. Examples 1-3 are control groups to show the characteristic oxygen release function of examples 4-6 by comparison.
The raw material components of examples 1 to 6 are shown in table 1 below.
Further, since the carbon fixing and oxygen releasing functions of the concrete designed by the invention are not affected, the invention is not limited to the cement dosage, the optical fiber dosage, the photoelectric material dosage, the water dosage and the water reducing agent dosage in the embodiment, except for the special requirements of the invention content. It is to be understood that the amounts mentioned herein are merely for purposes of more detailed, more specific explanation of the invention, and are not intended to limit the invention.
Step four: concrete preparation and curing
The method specifically comprises the following steps:
1) weighing the cement and the nano TiO according to the table 1 2 Water and a water reducing agent;
2) mixing nanometer TiO 2 The water reducing agent and water are placed in a beaker to be stirredStirring to prepare liquid solution, wherein the stirring process is carried out in a clockwise direction, and the stirring speed is 1 revolution per second;
3) putting the liquid solution into an ultrasonic dispersion machine, and carrying out ultrasonic treatment to obtain uniformly dispersed photoelectric material mixed solution; wherein the ultrasonic parameters comprise 400W and 25Hz, and the ultrasonic time is 2 hours;
4) drying and stirring the cement for 1min at the speed of 60 revolutions per minute, and then mixing and stirring the cement and the photoelectric material mixed solution for 4min to prepare fresh concrete; stirring slowly 2min before stirring, wherein the stirring speed is 1 revolution per second; stirring rapidly in the last 2min, wherein the stirring speed is 2 revolutions per second;
5) adding the fresh concrete into a corresponding non-porous template or a porous template, curing for 1 day in the dark under standard conditions, and removing the template to obtain formed concrete; particularly, for carbon-fixing oxygen-releasing concrete, redundant glass fibers on the surface need to be cut off so as to ensure that the surface of the concrete is smooth and flat; and continuing to maintain in dark under standard conditions until the total curing days reach 28 days to obtain the hardened concrete.
Further, in order to verify the progress of the preparation method of the green concrete with the carbon fixing and oxygen releasing functions, the hardened concrete samples obtained in examples 1 to 6 are tested for the carbon fixing amount and the oxygen releasing amount, and the test process refers to the test method standard for the long-term performance and durability of ordinary concrete (GB/T50082) -2009) and the in-situ detection device for the oxygen concentration in concrete and the preparation and use method thereof (CN112595760A), respectively. The test results are shown in table 1 below:
TABLE 1
As can be seen from the above test results, after the 28-day exposure test under 400nm light, the concentration of the pore oxygen in the concrete of example 1 (plain concrete), the concrete of example 2 (nano-reinforced concrete) and the concrete of example 3 (fiber reinforced concrete) was substantially the same, about 195mL/L, which is similar to the atmospheric oxygen concentration (200 mL/L), indicating that the nano TiO was doped singly 2 Or glass fibers are not availableThe function of oxygen release. Compared with examples 1-3, in example 4 (i.e. carbon fixing oxygen releasing concrete), the pore oxygen concentration after 28 days of exposure test is increased to 228mL/L, which is much higher than the atmospheric oxygen concentration, which shows that the invention can endow the concrete with the function of oxygen release through a method based on the photoelectric effect. Examples 5 and 6 show the test results of different material dosages of the carbon-fixing oxygen-releasing concrete, and the oxygen releasing effect is also clearly visible. In addition, the depth of the 28 day carbonation test for examples 4, 5, 6 also increased slightly from 2.6mm to 2.8mm or more compared to example 1, demonstrating that the present invention also contributes to further carbon sequestration of the concrete.
The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (10)
1. The concrete with the functions of fixing carbon and releasing oxygen is characterized by comprising a concrete body and optical fibers penetrating through the concrete body;
in the concrete body, the concrete material comprises the following components in parts by weight:
2. the concrete with the functions of fixing carbon and releasing oxygen as claimed in claim 1, wherein the optical fiber array is arranged in the concrete body.
3. The concrete with carbon-fixing oxygen-releasing function as claimed in claim 1 or 2, wherein the spacing d between adjacent optical fibers is 10-50mm, and the diameter of the optical fibers is (0.1-0.2) d.
4. The concrete with carbon-fixing oxygen-releasing function according to claim 1, wherein the cementing material comprises portland cement, and the photoelectric material comprises nano TiO 2 The additive comprises a water reducing agent; the optical fiber comprises a glass fiber.
5. The concrete with carbon fixing and oxygen releasing functions as claimed in claim 1, wherein the nano TiO is 2 Is rutile phase nano TiO 2 The particle diameter is 20-50nm, the specific surface area is 30-90m 2 /g。
6. The method for preparing the concrete with the functions of fixing carbon and releasing oxygen as claimed in any one of claims 1 to 5, which comprises the following steps:
1) the optical fiber is arranged in the through hole of the side wall of the groove-shaped mould in a penetrating way and penetrates through the forming cavity of the mould;
2) mixing a photoelectric material, water and an additive to obtain a photoelectric material mixed solution; and mixing the photoelectric material mixed solution with a cementing material, adding the mixture into a forming cavity of a groove-shaped die, standing and forming, taking out, and curing to obtain the concrete.
7. The method as claimed in claim 6, wherein in step 1), the sidewall through holes comprise parallel holes formed on opposite sidewalls of the groove-shaped mold.
8. The method for preparing concrete with carbon-fixing and oxygen-releasing functions according to claim 7, wherein in the step 1), two ends of the optical fiber extend out of the corresponding side wall through hole; and in the step 2), cutting and removing the two extending ends after the package is placed and formed.
9. The method for preparing the concrete with the carbon fixing and oxygen releasing functions according to claim 6, wherein in the step 2), the mixing process among the photoelectric material, the water and the admixture sequentially comprises stirring and ultrasonic dispersion;
wherein the stirring speed is 60-90 rpm; the ultrasonic power is 400-800W, the ultrasonic frequency is 25-40Hz, and the ultrasonic time is 1-2 h;
the mixing process of the photoelectric material mixed solution and the cementing material sequentially comprises the low-speed dry mixing of the cementing material, and the low-speed stirring and the high-speed stirring of the photoelectric material mixed solution and the cementing material;
wherein the stirring speed of the low-speed dry stirring is 60-90rpm, and the stirring time is 1-2 min; the stirring speed of low-speed stirring is 60-90rpm, and the stirring time is 2-3 min; the stirring speed of the high-speed stirring is 120-150rpm, and the stirring time is 1-2 min.
10. The method for preparing the concrete with the carbon fixing and oxygen releasing functions as claimed in claim 6, wherein in the step 2), the curing is performed in a dark place.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116425568A (en) * | 2023-04-11 | 2023-07-14 | 同济大学 | Preparation method of concrete with oxygen release function |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102167535A (en) * | 2010-12-27 | 2011-08-31 | 南京倍立达实业有限公司 | Preparation method and application of nano glass fiber reinforced concrete material |
| EP2489646A1 (en) * | 2010-12-22 | 2012-08-22 | Franz Carl Nüdling Basaltwerke GmbH + Co. KG | Method for manufacturing a photocatalytically active dry concrete mixture |
| CN108558321A (en) * | 2018-05-30 | 2018-09-21 | 北京市市政工程研究院 | A kind of high gloss non-light tight concrete and its preparation method and application |
| CN113636808A (en) * | 2021-08-04 | 2021-11-12 | 苏州阔凭环保科技有限公司 | Self-cleaning cement-based composite material and production method thereof |
-
2022
- 2022-04-08 CN CN202210367565.8A patent/CN114853410A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2489646A1 (en) * | 2010-12-22 | 2012-08-22 | Franz Carl Nüdling Basaltwerke GmbH + Co. KG | Method for manufacturing a photocatalytically active dry concrete mixture |
| CN102167535A (en) * | 2010-12-27 | 2011-08-31 | 南京倍立达实业有限公司 | Preparation method and application of nano glass fiber reinforced concrete material |
| CN108558321A (en) * | 2018-05-30 | 2018-09-21 | 北京市市政工程研究院 | A kind of high gloss non-light tight concrete and its preparation method and application |
| CN113636808A (en) * | 2021-08-04 | 2021-11-12 | 苏州阔凭环保科技有限公司 | Self-cleaning cement-based composite material and production method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 覃小红: "《微纳米纺织品与检测》", 东华大学出版社, pages: 130 - 131 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116425568A (en) * | 2023-04-11 | 2023-07-14 | 同济大学 | Preparation method of concrete with oxygen release function |
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