CN112537935B - Fluorescent photocatalytic water permeable brick and preparation method thereof - Google Patents
Fluorescent photocatalytic water permeable brick and preparation method thereof Download PDFInfo
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- CN112537935B CN112537935B CN202011567747.7A CN202011567747A CN112537935B CN 112537935 B CN112537935 B CN 112537935B CN 202011567747 A CN202011567747 A CN 202011567747A CN 112537935 B CN112537935 B CN 112537935B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C15/00—Pavings specially adapted for footpaths, sidewalks or cycle tracks
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C17/00—Pavement lights, i.e. translucent constructions forming part of the surface
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C5/00—Pavings made of prefabricated single units
- E01C5/04—Pavings made of prefabricated single units made of bricks
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V33/00—Structural combinations of lighting devices with other articles, not otherwise provided for
- F21V33/006—General building constructions or finishing work for buildings, e.g. roofs, gutters, stairs or floors; Garden equipment; Sunshades or parasols
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00284—Materials permeable to liquids
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00612—Uses not provided for elsewhere in C04B2111/00 as one or more layers of a layered structure
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/2038—Resistance against physical degradation
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/2038—Resistance against physical degradation
- C04B2111/2061—Materials containing photocatalysts, e.g. TiO2, for avoiding staining by air pollutants or the like
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/80—Optical properties, e.g. transparency or reflexibility
- C04B2111/807—Luminescent or fluorescent materials
Abstract
The invention belongs to the technical field of engineering building materials, and particularly relates to a fluorescent photocatalytic water permeable brick and a preparation method thereof. The fluorescent photocatalytic water permeable brick is of a double-layer structure, the lower layer of the water permeable brick is a recycled aggregate water permeable layer, and the upper layer of the water permeable brick is a fluorescent photocatalytic composite concrete layer. According to the invention, the water permeable brick is used as a substrate, a layered forming method is adopted, the water permeable brick is divided into a double-layer structure, so that the strength of the water permeable brick is ensured, the utilization rate of a fluorescent material and a carbon nitride nanosheet is improved, and the wear resistance and the waterproof performance of the water permeable brick are enhanced by adding quartz sand and PTB emulsion; and secondly, due to the addition of the carbon nitride nanosheets and the fluorescent powder, the water permeable brick has the advantages of self-sustained luminescence, visible light catalysis gas purification and self-cleaning. The invention is suitable for park walkways or sidewalks, not only meets the requirement of water permeability of the pavement, but also has the fluorescent property of emitting light at night to play a role in identification, continuously photocatalytically degrades pollutants, keeps clean and tidy, and is beneficial to popularization and application.
Description
Technical Field
The invention belongs to the technical field of engineering building materials, and particularly relates to a fluorescent photocatalytic water permeable brick and a preparation method thereof.
Background
Along with the improvement of living standard of people, more and more people walk and leisure in the park at night, the construction standard of the ecological park is higher and higher, the installation cost is high by adopting lamplight illumination, and the later maintenance and the use cost are high. Therefore, fluorescent pavement has become a hot point of research. However, the existing fluorescent pavement has the problems of poor luminous effect, poor wear resistance, easy dust coverage, high manufacturing cost, poor durability and the like, and the large-scale engineering application of the pavement is limited.
The permeable brick is used as a common permeable measure in the construction of a sponge city, provides a downward permeation way for rainwater, reduces surface water accumulation, reduces the surface runoff, supplements underground water, has the porous characteristic, can provide more contact areas with the outside for fluorescent materials and carbon nitride nanosheets, and improves the fluorescence and photocatalysis performance. Meanwhile, with the increase of the marketing process and the speed of urban construction, the quantity of recycled building aggregates and waste glass is increased day by day, and the resource recycling becomes a new trend.
The Chinese patent of patent CN206109909U discloses a water-permeable fluorescent pavement. The permeable fluorescent pavement is formed by fusing resin and fluorescent material to form resin particles to form a fluorescent particle layer, but the resin serving as an organic material has poorer durability than inorganic materials such as cement used in the patent. And to this road surface receive pollutants such as organic matter, dust easily to cover, cause the fluorescence effect to weaken, and the brick that permeates water of fluorescence photocatalysis of this patent has automatically cleaning performance, and the pollutant can decompose under the effect of photocatalysis material to through the space of the brick that permeates water, be favorable to the rainwater to bring the pollutant and the dust that decompose into underground, guaranteed to permeate water the clean and tidy on surface.
Chinese patent of patent CN111518441A discloses a visible light catalysis water permeable brick and a manufacturing method and application thereof. The visible light catalysis performance of the visible light catalysis water permeable brick mainly comprises Fe2O3/g-C3N4The visible light catalysis coating layer is realized, but the coating has the problem of poor adhesive property, and the photocatalysis property of the coating can be realized only under the condition of external visible light. The strength of the water permeable brick is ensured by using methods such as layered forming and PTB doping, and meanwhile, due to the addition of the fluorescent stone and the fluorescent powder, the water permeable brick has the functions of carrying out photocatalytic reaction through self-emitted fluorescence under dark conditions, creating fluorescent night scenes and the like.
Disclosure of Invention
The invention aims to provide a fluorescent photocatalytic water permeable brick and a preparation method thereof aiming at the defects of the prior art. By dividing the permeable brick into a double-layer structure, the interface connection is good, and the overall strength is high. The upper layer of the water permeable brick is a fluorescent photocatalytic water permeable layer, the fluorescent photocatalytic water permeable brick has good fluorescent performance, creates landscapes for park walkways and the like, can utilize sunlight to catalyze and degrade pollutants in the daytime and utilize fluorescence to continue photocatalytic degradation of pollutants at night, namely, the photocatalytic efficiency is high, and meanwhile, the fluorescent photocatalytic water permeable brick has the performances of high wear resistance, high water permeability, self-cleaning and the like; the lower layer is a recycled aggregate permeable layer, and is produced by recycled building aggregates, so that the product has high strength, good water permeability, energy conservation, environmental protection and good economic benefit.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a brick permeates water of fluorescence photocatalysis, the brick that permeates water is bilayer structure, including permeating water the brick lower floor and being regeneration aggregate permeable stratum, the upper strata is the compound permeable stratum of fluorescence photocatalysis.
The recycled aggregate permeable layer comprises, by mass, 30-50 parts of recycled aggregate, 10-15 parts of P.O 42.5.5 ordinary portland cement and 4-6 parts of water;
the fluorescent photocatalytic composite permeable layer comprises, by mass, 6-10 parts of white cement, 2-4 parts of fluorescent stone, 1-2 parts of fluorescent powder, 1-2 parts of carbon nitride nanosheets, 10-20 parts of quartz sand, 10-20 parts of transparent glass sand, 0-2 parts of PTB emulsion and 3-6 parts of water.
The total thickness of the permeable bricks is 50 mm, the thickness of the permeable layer of the recycled aggregate is 30-40 mm, and the thickness of the fluorescent photocatalytic composite permeable layer is 10-20 mm.
The white cement is PW.52.5, and the whiteness is more than or equal to 90.5. The recycled aggregate is obtained by mechanically crushing waste cement concrete bricks and then manually screening the crushed waste cement concrete bricks, and the particle size of the recycled aggregate is 4.75-9.5 mm. The transparent glass sand is obtained by mechanically crushing transparent glass and then manually sieving the crushed glass. The PTB emulsion is a special plastic dispersant, is an ethylene-vinyl chloride-vinyl ester product and is in a white emulsion state; the physical property indexes are viscosity: 80-120 MPa · s, solid content: 52. + -. 1wt%, specific gravity: 1.1, pH value: 7-9; it is stable, white, elastic, and suitable for cement, mortar and other hydraulic material. The average thickness of the carbon nitride nanosheet is 5 nm, and the carbon nitride nanosheet has good functions of air purification, pollution prevention, sterilization, ultraviolet aging resistance and the like. The fluorescent stone and the fluorescent powder can continuously emit light for more than 6 hours in the dark after absorbing and storing visible light for 5-10 min, the fineness of the fluorescent powder is 0.075-0.05 mm, and the particle size of the fluorescent stone is 4.75-9.5 mm.
The preparation method of the fluorescent photocatalytic water permeable brick comprises the following steps:
1) uniformly and dryly mixing 2-4 parts of fluorite, 10-20 parts of quartz sand and 10-20 parts of transparent glass sand to form mixed aggregate;
2) uniformly dry-mixing 6-10 parts of white cement and 1-2 parts of fluorescent powder to form a dry powder material;
3) dispersing 1-2 parts of carbon nitride nanosheets in 3-6 parts of mixing water required by the fluorescent photocatalytic composite layer, and performing ultrasonic dispersion treatment to form a carbon nitride nanosheet suspension;
4) mixing the carbon nitride nanosheet suspension in the step 3) and 0-2 parts of required PTB emulsion to form solution A;
5) fully mixing the mixed aggregate in the step 1), the dry powder in the step 2) and the solution A in the step 4), and uniformly stirring to obtain the fluorescent photocatalytic composite permeable concrete with good working performance.
6) And (3) mixing and uniformly stirring 30-50 parts of recycled aggregate and 10-15 parts of P.O 42.5.5 ordinary portland cement, adding 4-6 parts of water, and fully and uniformly stirring to obtain the recycled aggregate permeable concrete with good working performance.
7) Pouring the recycled aggregate pervious concrete in the step 6) into a pervious brick mold, pouring the recycled aggregate pervious concrete with the thickness of 30-40 mm, then inserting and tamping the recycled aggregate pervious concrete tightly by using a vibrating rod, pouring the fluorescent photocatalytic composite pervious concrete in the step 5) into the mold with the thickness of 10-20 mm, filling the mold, then vibrating and tamping the recycled aggregate pervious concrete tightly by using a flat vibrator, putting the recycled aggregate pervious concrete into a closed workshop for drying and curing for 24 hours, then demolding, and finally performing natural curing to obtain the fluorescent photocatalytic pervious brick.
Compared with the prior art, the invention has the following advantages:
(1) good fluorescence properties. White cement is used as a cementing material, so that the light reflection capability of the upper layer structure is improved; meanwhile, the transparent glass sand is used as aggregate, so that the light transmission performance of the upper layer structure is improved, light storage and light emitting paths of the fluorescent stone and the fluorescent powder are increased, the base body is a water permeable brick, the porosity of the specific surface area is high, the contact area of the fluorescent material and the outside is increased, and the brightness of the fluorescent photocatalysis composite water permeable layer is improved.
(2) The photocatalytic degradation of pollutants is efficient. The fluorescent stone, the fluorescent powder and the carbon nitride nanosheet are doped in the upper layer structure of the water permeable brick to form the fluorescent photocatalytic composite water permeable layer with fluorescence and self-cleaning performance. The doped carbon nitride nanosheet has good functions of air purification, pollution prevention and the like, the doped fluorspar and phosphor powder have the functions of light storage and luminescence, so that the fluorescent photocatalytic water permeable brick has the capability of continuously photocatalytic degrading pollutants at night, and the used substrate is a high-porosity water permeable brick, so that the contact area of the carbon nitride nanosheet and the outside can be increased, and the photocatalytic efficiency is high.
(3) Good self-cleaning performance. Because the brick that permeates water has more intercommunicating pore, after the photocatalysis had degraded the pollutant, the pollutant after the decomposition can prevent to block up along with rainwater infiltration underground smoothly, consequently can effectual solution brick surface by pollutant and dust cover problem, improve the surperficial luminance of brick in the use, prolong the life of the brick that permeates water of fluorescence photocatalysis.
(4) Good durability. The added PTB emulsion is a special plastic dispersant, has good waterproof, bonding, heat resistance, corrosion resistance, freezing resistance and crack resistance, solves the problem of interface connection between the fluorite and the transparent glass sand and the cement-based material, improves the bonding property of a double-layer structure interface, and has higher wear resistance due to the surface doped with quartz sand.
(5) The environmental protection is good. The recycled building aggregate and the transparent glass sand used in the invention are all waste materials, no harmful substances are released in the construction and use processes, and the recycled building aggregate and the transparent glass sand have the function of photocatalytic degradation of pollutants, thereby being beneficial to environmental management and protection.
The invention is suitable for park walkways or sidewalks, the fluorescent photocatalytic water permeable brick not only meets the requirement of road surface water permeability, but also has the fluorescent property of emitting light at night to play a role in identification, can build a new landscape for cities, can continuously degrade pollutants by photocatalysis, keeps clean and tidy, and is beneficial to popularization and application.
Detailed Description
For further disclosure, but not limitation, the present invention is described in further detail below with reference to examples.
A fluorescent photocatalytic water permeable brick is of a double-layer structure and comprises a water permeable brick lower layer, a fluorescent photocatalytic composite water permeable layer and a regenerated aggregate permeable layer, wherein the regenerated aggregate permeable layer comprises 30-50 parts by mass of regenerated aggregate, 10-15 parts by mass of P.O 42.5.5 ordinary portland cement and 4-6 parts by mass of water; the fluorescent photocatalytic composite permeable layer comprises, by mass, 6-10 parts of white cement, 2-4 parts of fluorescent stone, 1-2 parts of fluorescent powder, 1-2 parts of carbon nitride nanosheets, 10-20 parts of quartz sand, 10-20 parts of transparent glass sand, 1-2 parts of PTB emulsion and 3-6 parts of water.
The total thickness of the permeable bricks is 50 mm, the thickness of the permeable layer of the recycled aggregate is 30-40 mm, and the thickness of the fluorescent photocatalytic composite permeable layer is 10-20 mm. The white cement is PW.52.5, and the whiteness is more than or equal to 90.5. The recycled aggregate is obtained by mechanically crushing waste cement concrete bricks and then manually screening the crushed waste cement concrete bricks, and the particle size of the recycled aggregate is 4.75-9.5 mm. The transparent glass sand is obtained by mechanically crushing transparent glass and then manually sieving the crushed glass. The PTB emulsion is a special plastic dispersant, is an ethylene-vinyl chloride-vinyl ester product and is in a white emulsion state; the physical property indexes are viscosity: 80-120 MPa · s, solid content: 52. + -. 1wt%, specific gravity: 1.1, pH value: 7-9; it is stable, white, elastic, and suitable for cement, mortar and other hydraulic material. The average thickness of the carbon nitride nanosheet is 5 nm, and the carbon nitride nanosheet has good functions of air purification, pollution prevention, sterilization, ultraviolet aging resistance and the like. The fluorescent stone and the fluorescent powder can continuously emit light for more than 6 hours in the dark after absorbing and storing visible light for 5-10 min, the fineness of the fluorescent powder is 0.075-0.05 mm, and the particle size of the fluorescent stone is 4.75-9.5 mm.
The preparation method of the fluorescent photocatalytic water permeable brick comprises the following steps:
1) uniformly and dryly mixing 2-4 parts of fluorite, 10-20 parts of quartz sand and 10-20 parts of transparent glass sand to form mixed aggregate;
2) uniformly dry-mixing 6-10 parts of white cement and 1-2 parts of fluorescent powder to form a dry powder material;
3) dispersing 1-2 parts of carbon nitride nanosheets in 3-6 parts of mixing water required by the fluorescent photocatalytic composite layer, and performing ultrasonic dispersion treatment to form a carbon nitride nanosheet suspension;
4) mixing the carbon nitride nanosheet suspension in the step 3) and 0-2 parts of required PTB emulsion to form solution A;
5) fully mixing the mixed aggregate in the step 1), the dry powder in the step 2) and the solution A in the step 4), and uniformly stirring to obtain the fluorescent photocatalytic composite permeable concrete with good working performance.
6) And (3) mixing and uniformly stirring 30-50 parts of recycled aggregate and 10-15 parts of P.O 42.5.5 ordinary portland cement, adding 4-6 parts of water, and fully and uniformly stirring to obtain the recycled aggregate permeable concrete with good working performance.
7) Pouring the recycled aggregate pervious concrete in the step 6) into a pervious brick mold, pouring the recycled aggregate pervious concrete with the thickness of 30-40 mm, then inserting and tamping the recycled aggregate pervious concrete tightly by using a vibrating rod, pouring the fluorescent photocatalytic composite pervious concrete in the step 5) into the mold with the thickness of 10-20 mm, filling the mold, then vibrating and tamping the recycled aggregate pervious concrete tightly by using a flat vibrator, putting the recycled aggregate pervious concrete into a closed workshop for drying and curing for 24 hours, then demolding, and finally performing natural curing to obtain the fluorescent photocatalytic pervious brick.
Example 1
The utility model provides a brick permeates water of fluorescence photocatalysis, the brick that permeates water is bilayer structure, including permeating water the brick lower floor and being regeneration aggregate permeable stratum, the upper strata is the compound permeable stratum of fluorescence photocatalysis. The recycled aggregate permeable layer comprises 30 parts of recycled aggregate, 10 parts of P.O 42.5.5 ordinary portland cement and 4 parts of water by weight; the fluorescent photocatalytic composite permeable layer comprises, by mass, 6 parts of white cement, 2 parts of fluorescent stone, 1 part of fluorescent powder, 1 part of carbon nitride nanosheet, 10 parts of quartz sand, 20 parts of transparent glass sand, 1 part of PTB emulsion and 3 parts of water.
The total thickness of the permeable bricks is 50 mm, the thickness of the permeable layer of the recycled aggregate is 30-40 mm, and the thickness of the fluorescent photocatalytic composite permeable layer is 10-20 mm. The white cement is PW.52.5, and the whiteness is more than or equal to 90.5. The recycled aggregate is obtained by mechanically crushing waste cement concrete bricks and then manually screening the crushed waste cement concrete bricks, and the particle size of the recycled aggregate is 4.75-9.5 mm. The transparent glass sand is obtained by mechanically crushing transparent glass and then manually sieving the crushed glass. The PTB emulsion is a special plastic dispersant, is an ethylene-vinyl chloride-vinyl ester product and is in a white emulsion state; the physical property indexes are viscosity: 80-120 MPa · s, solid content: 52. + -. 1wt%, specific gravity: 1.1, pH value: 7-9; it is stable, white, elastic, and suitable for cement, mortar and other hydraulic material. The average thickness of the carbon nitride nanosheet is 5 nm, and the carbon nitride nanosheet has good functions of air purification, pollution prevention, sterilization, ultraviolet aging resistance and the like. The fluorescent stone and the fluorescent powder can continuously emit light for more than 6 hours in the dark after absorbing and storing visible light for 5-10 min, the fineness of the fluorescent powder is 0.075-0.05 mm, and the particle size of the fluorescent stone is 4.75-9.5 mm.
The preparation method of the fluorescent photocatalytic water permeable brick comprises the following steps:
1) uniformly and dryly mixing 2 parts of fluorite, 10 parts of quartz sand and 20 parts of transparent glass sand to form mixed aggregate;
2) uniformly and dry-mixing 6 parts of white cement and 1 part of fluorescent powder to form a dry powder material;
3) dispersing 1 part of carbon nitride nanosheet in 3 parts of mixed water, and performing ultrasonic dispersion treatment to form carbon nitride nanosheet suspension;
4) mixing the carbon nitride nanosheet suspension in the step 3) and 1 part of required PTB emulsion into solution A;
5) fully mixing the mixed aggregate in the step 1), the dry powder in the step 2) and the solution A in the step 4), and uniformly stirring to obtain the fluorescent photocatalytic composite permeable concrete with good working performance.
6) And mixing and stirring 30 parts of recycled aggregate and 10 parts of P.O 42.5.5 ordinary portland cement uniformly, adding 4 parts of water, and stirring uniformly to obtain the recycled aggregate permeable concrete with good working performance.
7) Pouring the recycled aggregate pervious concrete in the step 6) into a pervious brick mold, pouring the recycled aggregate pervious concrete with the thickness of 35 mm, then inserting and tamping the recycled aggregate pervious concrete tightly by using a vibrating rod, pouring the fluorescent photocatalytic composite pervious concrete in the step 5) into the mold, filling the mold, then using a flat vibrator to vibrate and tamp the recycled aggregate pervious concrete tightly, putting the recycled aggregate pervious concrete into a closed workshop for drying and curing for 24 hours, then demolding, and finally performing natural curing to obtain the fluorescent photocatalytic pervious brick.
The detection is carried out according to permeable brick (JC/T945-; detecting according to GB/T12988-2009, wherein the length of the grinding pit is not more than 15 mm; the detection is carried out according to the light-storing luminous paint for buildings (JG/T446-2The afterglow time is 6 hours; the detection is carried out according to the photocatalytic air purification material performance test method (GB/T23761-2009), and the NO removal efficiency is 0.45 mu mol g-1 h-1。
Through a rainfall simulation experiment, the effect of treating organic pollutants by the fluorescent photocatalytic water permeable brick and the common visible photocatalytic water permeable brick is compared, the two kinds of organic pollutants are firstly irradiated for 2 hours under a 300W xenon lamp, then the two kinds of organic pollutants are placed into 10 mg/L high-concentration RhB (rhodamine B dye) in a dark environment, after 60 minutes, the decomposition rate of the common visible photocatalytic water permeable brick on the RhB is tested to be almost 0, the fluorescent photocatalytic water permeable brick degrades the dye to 80% of the initial concentration, and therefore the fluorescent photocatalytic water permeable brick has the effect of removing pollutants under the dark condition.
Example 2
A fluorescent photocatalysis water permeable brick is of a double-layer structure and comprises a water permeable brick lower layer, an upper layer and a regenerated aggregate water permeable layer, wherein the regenerated aggregate water permeable layer comprises 40 parts of regenerated aggregate, 13 parts of P.O 42.5.5 ordinary portland cement and 5 parts of water in parts by weight; the fluorescent photocatalytic composite permeable layer comprises 8 parts of white cement, 3 parts of fluorescent stone, 2 parts of fluorescent powder, 2 parts of carbon nitride nanosheets, 20 parts of quartz sand, 10 parts of transparent glass sand, 2 parts of PTB emulsion and 5 parts of water by mass.
The total thickness of the permeable bricks is 50 mm, the thickness of the permeable layer of the recycled aggregate is 30-40 mm, and the thickness of the fluorescent photocatalytic composite permeable layer is 10-20 mm. The white cement is PW.52.5, and the whiteness is more than or equal to 90.5. The recycled aggregate is obtained by mechanically crushing waste cement concrete bricks and then manually screening the crushed waste cement concrete bricks, and the particle size of the recycled aggregate is 4.75-9.5 mm. The transparent glass sand is obtained by mechanically crushing transparent glass and then manually sieving the crushed glass. The PTB emulsion is a special plastic dispersant, is an ethylene-vinyl chloride-vinyl ester product and is in a white emulsion state; the physical property indexes are viscosity: 80-120 MPa · s, solid content: 52. + -. 1wt%, specific gravity: 1.1, pH value: 7-9; it is stable, white, elastic, and suitable for cement, mortar and other hydraulic material. The average thickness of the carbon nitride nanosheet is 5 nm, and the carbon nitride nanosheet has good functions of air purification, pollution prevention, sterilization, ultraviolet aging resistance and the like. The fluorescent stone and the fluorescent powder can continuously emit light for more than 6 hours in the dark after absorbing and storing visible light for 5-10 min, the fineness of the fluorescent powder is 0.075-0.05 mm, and the particle size of the fluorescent stone is 4.75-9.5 mm.
The preparation method of the fluorescent photocatalytic water permeable brick comprises the following steps:
1) uniformly and dryly mixing 3 parts of fluorite, 20 parts of quartz sand and 10 parts of transparent glass sand to form mixed aggregate;
2) uniformly and dry-mixing 8 parts of white cement and 2 parts of fluorescent powder to form a dry powder material;
3) dispersing 2 parts of carbon nitride nanosheets in 5 parts of mixing water, and performing ultrasonic dispersion treatment to form carbon nitride nanosheet suspension;
4) mixing the carbon nitride nanosheet suspension in the step 3) and 2 parts of required PTB emulsion into solution A;
5) fully mixing the mixed aggregate in the step 1), the dry powder in the step 2) and the solution A in the step 4), and uniformly stirring to obtain the fluorescent photocatalytic composite permeable concrete with good working performance.
6) And (3) mixing and stirring 40 parts of recycled aggregate and 13 parts of P.O 42.5.5 ordinary portland cement uniformly, adding 5 parts of water, and stirring uniformly to obtain the recycled aggregate permeable concrete with good working performance.
7) Pouring the recycled aggregate pervious concrete in the step 6) into a pervious brick mold, pouring the recycled aggregate pervious concrete with the thickness of 38 mm, then inserting and tamping the recycled aggregate pervious concrete tightly by using a vibrating rod, pouring the fluorescent photocatalytic composite pervious concrete in the step 5) into the mold, filling the mold, then using a flat vibrator to vibrate and tamp the concrete, putting the mold into a closed workshop for drying and curing for 24 hours, then demolding, and finally performing natural curing to obtain the fluorescent photocatalytic pervious brick.
The detection is carried out according to permeable brick (JC/T945-; detecting according to GB/T12988-2009, wherein the length of the grinding pit is not more than 10 mm; the detection is carried out according to the light-storing luminous paint for buildings (JG/T446-2The afterglow time is 6 hours; the detection is carried out according to the photocatalytic air purification material performance test method (GB/T23761-2009), and the NO removal efficiency is 0.47 mu mol g-1 h-1。
Through a rainfall simulation experiment, the effect of treating organic pollutants by the fluorescent photocatalytic water permeable brick and the common visible photocatalytic water permeable brick is compared, the two kinds of organic pollutants are firstly irradiated for 2 hours under a 300W xenon lamp, then the two kinds of organic pollutants are placed into 10 mg/L high-concentration RhB (rhodamine B dye) in a dark environment, after 60 minutes, the decomposition rate of the common visible photocatalytic water permeable brick on the RhB is tested to be almost 0, the fluorescent photocatalytic water permeable brick degrades the dye to 78% of the initial concentration, and therefore the fluorescent photocatalytic water permeable brick has the effect of removing pollutants under the dark condition.
Example 3
A fluorescent photocatalysis water permeable brick is of a double-layer structure and comprises a water permeable brick lower layer, an upper layer and a regenerated aggregate permeable layer, wherein the regenerated aggregate permeable layer comprises 50 parts of regenerated aggregate, 15 parts of P.O 42.5.5 ordinary portland cement and 6 parts of water in parts by weight; the fluorescent photocatalytic composite permeable layer comprises, by mass, 10 parts of white cement, 4 parts of fluorescent stone, 2 parts of fluorescent powder, 2 parts of carbon nitride nanosheets, 15 parts of quartz sand, 15 parts of transparent glass sand, 2 parts of PTB emulsion and 6 parts of water.
The total thickness of the permeable bricks is 50 mm, the thickness of the permeable layer of the recycled aggregate is 30-40 mm, and the thickness of the fluorescent photocatalytic composite permeable layer is 10-20 mm. The white cement is PW.52.5, and the whiteness is more than or equal to 90.5. The recycled aggregate is obtained by mechanically crushing waste cement concrete bricks and then manually screening the crushed waste cement concrete bricks, and the particle size of the recycled aggregate is 4.75-9.5 mm. The transparent glass sand is obtained by mechanically crushing transparent glass and then manually sieving the crushed glass. The PTB emulsion is a special plastic dispersant, is an ethylene-vinyl chloride-vinyl ester product and is in a white emulsion state; the physical property indexes are viscosity: 80-120 MPa · s, solid content: 52. + -. 1wt%, specific gravity: 1.1, pH value: 7-9; it is stable, white, elastic, and suitable for cement, mortar and other hydraulic material. The average thickness of the carbon nitride nanosheet is 5 nm, and the carbon nitride nanosheet has good functions of air purification, pollution prevention, sterilization, ultraviolet aging resistance and the like. The fluorescent stone and the fluorescent powder can continuously emit light for more than 6 hours in the dark after absorbing and storing visible light for 5-10 min, the fineness of the fluorescent powder is 0.075-0.05 mm, and the particle size of the fluorescent stone is 4.75-9.5 mm.
The preparation method of the fluorescent photocatalytic water permeable brick comprises the following steps:
1) uniformly and dryly mixing 4 parts of fluorite, 15 parts of quartz sand and 15 parts of transparent glass sand to form mixed aggregate;
2) uniformly and dryly mixing 10 parts of white cement and 2 parts of fluorescent powder to form a dry powder;
3) dispersing 2 parts of carbon nitride nanosheets in 6 parts of mixing water, and performing ultrasonic dispersion treatment to form carbon nitride nanosheet suspension;
4) mixing the carbon nitride nanosheet suspension in the step 3) and 2 parts of required PTB emulsion into solution A;
5) fully mixing the mixed aggregate in the step 1), the dry powder in the step 2) and the solution A in the step 4), and uniformly stirring to obtain the fluorescent photocatalytic composite permeable concrete with good working performance.
6) And mixing and stirring 50 parts of recycled aggregate and 15 parts of P.O 42.5.5 ordinary portland cement uniformly, adding 6 parts of water, and stirring uniformly to obtain the recycled aggregate permeable concrete with good working performance.
7) Pouring the recycled aggregate pervious concrete in the step 6) into a pervious brick mold, pouring the recycled aggregate pervious concrete with the volume of 40 mm (thickness), then inserting and tamping the recycled aggregate pervious concrete tightly by using a vibrating rod, pouring the fluorescent photocatalytic composite pervious concrete in the step 5) into the mold, filling the mold, then using a flat vibrator to vibrate and tamp the recycled aggregate pervious concrete tightly, putting the recycled aggregate pervious concrete into a closed workshop for drying and curing for 24 hours, then demolding, and finally performing natural curing to obtain the fluorescent photocatalytic pervious brick.
The detection is carried out according to permeable brick (JC/T945-; detecting according to GB/T12988-2009, wherein the length of the grinding pit is not more than 12 mm; the detection is carried out according to the light-storing luminous paint for buildings (JG/T446-2The afterglow time is 6 hours; the detection is carried out according to a photocatalytic air purification material performance test method (GB/T23761-2009), and the NO removal efficiency is 0.49 mu mol g-1 h-1。
Through a rainfall simulation experiment, the effect of treating organic pollutants by the fluorescent photocatalytic water permeable brick and the common visible photocatalytic water permeable brick is compared, the two kinds of organic pollutants are firstly irradiated for 2 hours under a 300W xenon lamp, then the two kinds of organic pollutants are placed into 10 mg/L high-concentration RhB (rhodamine B dye) in a dark environment, after 60 minutes, the test shows that the decomposition rate of the common visible photocatalytic water permeable brick on the RhB is almost 0, and the fluorescent photocatalytic water permeable brick degrades the dye to 75% of the initial concentration, so that the fluorescent photocatalytic water permeable brick has the effect of removing pollutants under the dark condition.
Example 4 (comparative example)
The utility model provides a brick permeates water of fluorescence photocatalysis, the brick that permeates water is bilayer structure, including permeating water the brick lower floor and being regeneration aggregate permeable stratum, the upper strata is the compound permeable stratum of fluorescence photocatalysis. The recycled aggregate permeable layer comprises 30 parts of recycled aggregate, 10 parts of P.O 42.5.5 ordinary portland cement and 4 parts of water by weight; the fluorescent photocatalytic composite permeable layer comprises 6 parts of white cement, 2 parts of fluorescent stone, 1 part of fluorescent powder, 1 part of carbon nitride nanosheet, 10 parts of quartz sand, 20 parts of transparent glass sand and 4 parts of water by mass.
The total thickness of the permeable bricks is 50 mm, the thickness of the permeable layer of the recycled aggregate is 30-40 mm, and the thickness of the fluorescent photocatalytic composite permeable layer is 10-20 mm. The white cement is PW.52.5, and the whiteness is more than or equal to 90.5. The recycled aggregate is obtained by mechanically crushing waste cement concrete bricks and then manually screening the crushed waste cement concrete bricks, and the particle size of the recycled aggregate is 4.75-9.5 mm. The transparent glass sand is obtained by mechanically crushing transparent glass and then manually sieving the crushed glass. The average thickness of the carbon nitride nanosheet is 5 nm, and the carbon nitride nanosheet has good functions of air purification, pollution prevention, sterilization, ultraviolet aging resistance and the like. The fluorescent stone and the fluorescent powder can continuously emit light for more than 6 hours in the dark after absorbing and storing visible light for 5-10 min, the fineness of the fluorescent powder is 0.075-0.05 mm, and the particle size of the fluorescent stone is 4.75-9.5 mm.
The preparation method of the fluorescent photocatalytic water permeable brick comprises the following steps:
1) uniformly and dryly mixing 2 parts of fluorite, 10 parts of quartz sand and 20 parts of transparent glass sand to form mixed aggregate;
2) uniformly and dry-mixing 6 parts of white cement and 1 part of fluorescent powder to form a dry powder material;
3) dispersing 1 part of carbon nitride nanosheet in 4 parts of mixed water, and performing ultrasonic dispersion treatment to form carbon nitride nanosheet suspension;
4) fully mixing the mixed aggregate in the step 1), the dry powder in the step 2) and the carbon nitride nanosheet suspension in the step 3), and uniformly stirring to obtain the fluorescent photocatalytic composite pervious concrete with good working performance.
5) And mixing and stirring 30 parts of recycled aggregate and 10 parts of P.O 42.5.5 ordinary portland cement uniformly, adding 4 parts of water, and stirring uniformly to obtain the recycled aggregate permeable concrete with good working performance.
6) Pouring the recycled aggregate pervious concrete in the step 5) into a pervious brick mold, pouring the recycled aggregate pervious concrete with the thickness of 35 mm, then inserting and tamping the recycled aggregate pervious concrete tightly by using a vibrating rod, pouring the fluorescent photocatalytic composite pervious concrete in the step 4) into the mold, filling the mold, then using a flat vibrator to vibrate and tamp the recycled aggregate pervious concrete tightly, putting the recycled aggregate pervious concrete into a closed workshop for drying and curing for 24 hours, then demolding, and finally performing natural curing to obtain the fluorescent photocatalytic pervious brick.
The detection is carried out according to permeable brick (JC/T945-; detecting according to GB/T12988-2009, wherein the length of the grinding pit is not more than 18 mm; the detection is carried out according to the light-storing luminous paint for buildings (JG/T446-2The afterglow time is 6 hours; the detection is carried out according to the photocatalytic air purification material performance test method (GB/T23761-2009), and the NO removal efficiency is 0.46 mu mol g-1 h-1。
Through a rainfall simulation experiment, the effect of treating organic pollutants by the fluorescent photocatalytic water permeable brick and the common visible photocatalytic water permeable brick is compared, the two kinds of organic pollutants are firstly irradiated for 2 hours under a 300W xenon lamp, then the two kinds of organic pollutants are placed into 10 mg/L high-concentration RhB (rhodamine B dye) in a dark environment, after 60 minutes, the decomposition rate of the common visible photocatalytic water permeable brick on the RhB is tested to be almost 0, the fluorescent photocatalytic water permeable brick degrades the dye to 78% of the initial concentration, and therefore the fluorescent photocatalytic water permeable brick has the effect of removing pollutants under the dark condition.
The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.
Claims (8)
1. A preparation method of a fluorescent photocatalytic water permeable brick is characterized by comprising the following steps: the permeable brick is of a double-layer structure, the lower layer of the permeable brick is a recycled aggregate permeable layer, and the upper layer of the permeable brick is a fluorescent photocatalysis composite permeable layer; the recycled aggregate permeable layer comprises, by mass, 30-50 parts of recycled aggregate, 10-15 parts of P.O 42.5.5 ordinary portland cement and 4-6 parts of water; the fluorescent photocatalytic composite permeable layer comprises, by mass, 6-10 parts of white cement, 2-4 parts of fluorite, 1-2 parts of fluorescent powder, 1-2 parts of carbon nitride nanosheets, 10-20 parts of quartz sand, 10-20 parts of transparent glass sand, 1-2 parts of PTB emulsion and 3-6 parts of water;
the preparation method comprises the following steps:
1) uniformly and dryly mixing 2-4 parts of fluorite, 10-20 parts of quartz and 10-20 parts of transparent glass to form mixed aggregate;
2) uniformly dry-mixing 6-10 parts of white cement and 1-2 parts of fluorescent powder to form a dry powder material;
3) dispersing 1-2 parts of carbon nitride nanosheets in 3-6 parts of mixing water required by the fluorescent photocatalytic composite layer, and performing ultrasonic dispersion treatment to form a carbon nitride nanosheet suspension;
4) mixing the carbon nitride nanosheet suspension in the step 3) and 1-2 parts of required PTB emulsion to form solution A;
5) fully mixing the mixed aggregate in the step 1), the dry powder in the step 2) and the solution A in the step 4), and uniformly stirring to obtain the fluorescent photocatalytic composite permeable concrete with good working performance;
6) mixing and stirring 30-50 parts of recycled aggregate and 10-15 parts of P.O 42.5.5 ordinary portland cement uniformly, adding 4-6 parts of water, and fully stirring uniformly to obtain recycled aggregate pervious concrete with good working performance;
7) pouring the recycled aggregate pervious concrete in the step 6) into a pervious brick mold, inserting and tamping the recycled aggregate pervious concrete by using a vibrating rod for compacting, pouring the fluorescent photocatalytic composite pervious concrete in the step 5) into the mold, filling the mold, vibrating and compacting by using a flat vibrator, putting the mold into a closed workshop for drying and curing for 24 hours, then demolding, and finally performing natural curing to obtain the fluorescent photocatalytic pervious brick.
2. The preparation method of the fluorescent photocatalytic water permeable brick according to claim 1, characterized in that: the total thickness of the permeable bricks is 50 mm, the thickness of the permeable layer of the recycled aggregate is 30-40 mm, and the thickness of the fluorescent photocatalytic composite permeable layer is 10-20 mm.
3. The preparation method of the fluorescent photocatalytic water permeable brick according to claim 1, characterized in that: the white cement is PW.52.5, and the whiteness is more than or equal to 90.5.
4. The preparation method of the fluorescent photocatalytic water permeable brick according to claim 1, characterized in that: the recycled aggregate is obtained by mechanically crushing waste cement concrete bricks and then manually screening the crushed waste cement concrete bricks, and the particle size of the recycled aggregate is 4.75-9.5 mm; the transparent glass sand is obtained by mechanically crushing transparent glass and then manually sieving the crushed glass.
5. The preparation method of the fluorescent photocatalytic water permeable brick according to claim 1, characterized in that: the PTB emulsion is an ethylene-vinyl chloride-vinyl ester product and is in a white emulsion state; the physical property indexes are viscosity: 80-120 MPa · s, solid content: 52. + -. 1wt%, specific gravity: 1.1, pH value: 7 to 9.
6. The preparation method of the fluorescent photocatalytic water permeable brick according to claim 1, characterized in that: the carbon nitride nanosheet has the average thickness of 5 nm, and has good air purification, antifouling, sterilization and ultraviolet aging resistance functions.
7. The preparation method of the fluorescent photocatalytic water permeable brick according to claim 1, characterized in that: the fluorescent stone and the fluorescent powder can continuously emit light for more than 6 hours in the dark after being irradiated by visible light for energy storage for 5-10 min; the fineness of the fluorescent powder is 0.075-0.05 mm, and the particle size of the fluorescent stone is 4.75-9.5 mm.
8. The preparation method of the fluorescent photocatalytic water permeable brick according to claim 1, characterized in that: the thickness of the pervious concrete poured with the recycled aggregate in the step 7) is 30-40 mm; the thickness of the poured fluorescence photocatalysis composite pervious concrete is 10-20 mm.
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