CN116947385B - High-water-permeability pavement brick capable of adsorbing impurities and preparation method thereof - Google Patents
High-water-permeability pavement brick capable of adsorbing impurities and preparation method thereof Download PDFInfo
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- 239000011449 brick Substances 0.000 title claims abstract description 46
- 239000012535 impurity Substances 0.000 title claims abstract description 12
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 68
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 36
- 239000000440 bentonite Substances 0.000 claims abstract description 36
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 36
- 230000035699 permeability Effects 0.000 claims abstract description 16
- 239000004568 cement Substances 0.000 claims abstract description 15
- 235000019738 Limestone Nutrition 0.000 claims abstract description 14
- 239000006004 Quartz sand Substances 0.000 claims abstract description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000006028 limestone Substances 0.000 claims abstract description 14
- 239000002893 slag Substances 0.000 claims abstract description 14
- 239000000853 adhesive Substances 0.000 claims abstract description 8
- 230000001070 adhesive effect Effects 0.000 claims abstract description 8
- 239000002994 raw material Substances 0.000 claims abstract description 6
- 229940092782 bentonite Drugs 0.000 claims description 33
- 238000001035 drying Methods 0.000 claims description 24
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 20
- 238000003756 stirring Methods 0.000 claims description 20
- ONCZQWJXONKSMM-UHFFFAOYSA-N dialuminum;disodium;oxygen(2-);silicon(4+);hydrate Chemical compound O.[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Na+].[Na+].[Al+3].[Al+3].[Si+4].[Si+4].[Si+4].[Si+4] ONCZQWJXONKSMM-UHFFFAOYSA-N 0.000 claims description 19
- 229940080314 sodium bentonite Drugs 0.000 claims description 19
- 229910000280 sodium bentonite Inorganic materials 0.000 claims description 19
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 claims description 14
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 13
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 claims description 13
- 239000011837 N,N-methylenebisacrylamide Substances 0.000 claims description 12
- ZIUHHBKFKCYYJD-UHFFFAOYSA-N n,n'-methylenebisacrylamide Chemical compound C=CC(=O)NCNC(=O)C=C ZIUHHBKFKCYYJD-UHFFFAOYSA-N 0.000 claims description 12
- 238000005406 washing Methods 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 11
- 238000002156 mixing Methods 0.000 claims description 10
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 10
- 239000003822 epoxy resin Substances 0.000 claims description 7
- 238000000465 moulding Methods 0.000 claims description 7
- 229920000647 polyepoxide Polymers 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 5
- 239000004925 Acrylic resin Substances 0.000 claims description 2
- 229920000178 Acrylic resin Polymers 0.000 claims description 2
- 229920005749 polyurethane resin Polymers 0.000 claims description 2
- 239000011230 binding agent Substances 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 9
- 239000010865 sewage Substances 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 abstract description 6
- 239000000126 substance Substances 0.000 abstract description 3
- 230000006835 compression Effects 0.000 abstract description 2
- 238000007906 compression Methods 0.000 abstract description 2
- 238000010276 construction Methods 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 10
- 238000005266 casting Methods 0.000 description 5
- 229910021645 metal ion Inorganic materials 0.000 description 5
- 239000008367 deionised water Substances 0.000 description 4
- 229910021641 deionized water Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 2
- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical compound [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- -1 aluminum ions Chemical class 0.000 description 2
- 229910001431 copper ion Inorganic materials 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000002352 surface water Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010438 granite Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/40—Compounds containing silicon, titanium or zirconium or other organo-metallic compounds; Organo-clays; Organo-inorganic complexes
- C04B24/42—Organo-silicon compounds
- C04B24/425—Organo-modified inorganic compounds, e.g. organo-clays
-
- 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
-
- 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
- E01C11/00—Details of pavings
- E01C11/22—Gutters; Kerbs ; Surface drainage of streets, roads or like traffic areas
- E01C11/224—Surface drainage of streets
- E01C11/225—Paving specially adapted for through-the-surfacing drainage, e.g. perforated, porous; Preformed paving elements comprising, or adapted to form, passageways for carrying off drainage
-
- 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
-
- 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
-
- 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
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Civil Engineering (AREA)
- Architecture (AREA)
- Dispersion Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Road Paving Structures (AREA)
Abstract
The invention provides a high-water-permeability pavement brick for adsorbing impurities and a preparation method thereof, wherein the pavement brick is prepared from the following raw materials in parts by weight: 35-40 parts of cement, 15-20 parts of organic bentonite, 20-30 parts of quartz sand, 10-12 parts of blast furnace slag, 5-10 parts of limestone, 2-5 parts of adhesive and 25-35 parts of water. According to the invention, cement, quartz sand, blast furnace slag, limestone, organic bentonite and other materials are mixed according to a certain proportion to prepare the water-based pavement brick, so that the prepared water-based pavement brick not only has good compression resistance and crack resistance, but also has good water permeability, is beneficial to urban drainage, prevents sudden increase of rainwater runoff, and is beneficial to adsorbing harmful substances and impurities in sewage by adding the organic bentonite into the water-based pavement brick, so that the water quality is purified, and the construction of a green environment-friendly city is quickened.
Description
Technical Field
The invention relates to the field of pavement bricks, in particular to a high-water-permeability pavement brick for adsorbing impurities and a preparation method thereof.
Background
In urban construction, the waterproof materials such as granite, cement, asphalt and the like are often adopted as pavement, and the materials are applied to the ground surface, so that the waterproof pavement has the advantages of attractive appearance, low cost and the like, but when heavy rain is encountered, the hardened pavement prevents rainwater from penetrating into the ground, the rainwater runoff of the ground surface can exceed the load of a municipal drainage pipe network, so that the ground surface is accumulated, and great inconvenience is brought to the trip of people.
The water-permeable pavement brick is a pavement paving material with special design, and has good water permeability. Compared with the traditional pavement paving material, the water-permeable pavement brick can permeate rainwater, so that the risks of water accumulation and road wet and slippery are reduced. However, the existing water permeable bricks have low water permeability and poor water filtering effect, harmful substances possibly exist on the surfaces of the bricks or certain pollutants cannot be effectively removed, and the harmful substances easily permeate into the land along with rainwater, so that the growth of urban vegetation is adversely affected. Therefore, the problems of poor water permeability, poor water filtering effect, poor adsorption effect and the like of the pavement bricks are needed to be solved.
Disclosure of Invention
In view of the above, the invention provides a pavement brick with high water permeability for adsorbing impurities and a preparation method thereof.
The technical scheme of the invention is realized as follows:
the high-permeability pavement brick for adsorbing impurities comprises the following raw materials in parts by weight: 35-40 parts of cement, 15-20 parts of organic bentonite, 20-30 parts of quartz sand, 10-12 parts of blast furnace slag, 5-10 parts of limestone, 2-5 parts of adhesive and 25-35 parts of water.
Further, the material comprises the following raw materials in parts by weight: 35 parts of cement, 25 parts of quartz sand, 10 parts of blast furnace slag, 16 parts of organic bentonite, 8 parts of limestone, 3 parts of adhesive and 32 parts of water.
Further, the preparation method of the organic bentonite comprises the following steps:
(1) Mixing sodium carbonate solution and bentonite, stirring, centrifuging and drying to obtain sodium bentonite;
(2) Adding hexadecyl trimethyl ammonium bromide into the sodium bentonite in the step (1), mixing, stirring, adding acrylamide, azodiisobutyronitrile and N, N-methylene bisacrylamide, heating, washing and drying to obtain the organic bentonite.
Further, in the step (1), the mass fraction of the sodium carbonate solution is 5% -6%.
Further, in the step (1), the mass ratio of the sodium carbonate solution to the bentonite is 5-10: 100-200.
Further, in the step (2), the ratio of the sodium bentonite, the acrylamide, the azodiisobutyronitrile, the N, N-methylene bisacrylamide and the hexadecyl trimethyl ammonium bromide is 9 g-10 g:2 g-3 g:0.1 g-0.2 g:0.5 g-0.6 g:35 mL-45 mL.
Further, in the step (1), the stirring speed is 300-400 r/min, and stirring is carried out for 2-3 h; the centrifugal speed is 10000-12000 r/min, and the centrifugal speed is 3-5 min; the drying temperature is 70-75 ℃, and the drying is carried out for 1-2 hours.
Further, in the step (2), stirring for 20-24 hours after mixing; the heating temperature is 70-80 ℃ and the heating time is 1-2 h; washing for 20-30 min; the drying temperature after washing is 50-60 ℃, and the drying temperature after washing is 2-3 h.
Further, the adhesive is one or more of aqueous epoxy resin, aqueous polyurethane resin and aqueous acrylic resin.
Further, the method is characterized by comprising the following steps of: mixing cement, organic bentonite, quartz sand, blast furnace slag, limestone, an adhesive and water, stirring for 40-50 min at 1500-1600 r/min, and pouring and molding to obtain the water-based pavement brick.
Compared with the prior art, the invention has the beneficial effects that:
(1) According to the invention, cement, quartz sand, blast furnace slag, limestone, organic bentonite and other materials are mixed according to a certain proportion to prepare the water-based pavement brick, and the prepared water-based pavement brick not only has good compression resistance and crack resistance, but also has good water permeability, is beneficial to urban drainage and prevents the sudden increase of rainwater runoff.
(2) The water-based pavement brick disclosed by the invention takes the organic bentonite as a component raw material, is beneficial to adsorbing metal ions and impurities in sewage, purifying water quality, promoting healthy growth of vegetation and building a green environment-friendly city.
(3) According to the invention, through determining the technological parameters of stirring and heating in the preparation process of the organic bentonite, the materials are ensured to be fully contacted and react fully, and the prepared organic bentonite particles are uniform in texture, so that the adsorption capacity of the organic bentonite is improved, the filtering efficiency is improved, and the quality stability of the finished product of the water-based pavement brick is improved.
Detailed Description
In order to better understand the technical content of the present invention, the following provides specific examples to further illustrate the present invention.
The experimental methods used in the embodiment of the invention are conventional methods unless otherwise specified.
Materials, reagents, and the like used in the examples of the present invention are commercially available unless otherwise specified.
Example 1 Water-based pavement brick and method for preparing the same
(1) The sodium carbonate solution with the mass fraction of 5 percent and bentonite are mixed according to the mass ratio of 5:100, stirring for 2h at 300r/min, centrifuging for 5min at 10000r/min, and drying at 70deg.C in a drying oven for 1h to obtain sodium bentonite.
(2) Adding hexadecyl trimethyl ammonium bromide into the sodium bentonite in the step (1), mixing, stirring for 20 hours, adding acrylamide, azodiisobutyronitrile and N, N-methylene bisacrylamide, heating for 1 hour at 70 ℃, adding deionized water, washing for 20 minutes, and drying for 2 hours at 50 ℃ to obtain organic bentonite; the proportion of the sodium bentonite, the acrylamide, the azodiisobutyronitrile, the N, N-methylene bisacrylamide and the hexadecyl trimethyl ammonium bromide is 9g:2g:0.1g:0.5g:35mL.
(3) According to the weight proportion, 35kg of cement, 15kg of organic bentonite, 20kg of quartz sand, 10kg of blast furnace slag, 5kg of limestone, 2kg of water-based epoxy resin and 25kg of water are mixed, stirred for 40min at 1500r/min, and then placed into a mould for casting molding, so that the water-based pavement brick is prepared.
Example 2-Water-based pavement brick and method for preparing the same
(1) The sodium carbonate solution with the mass fraction of 5 percent and bentonite are mixed according to the mass ratio of 6:150, stirring at 300r/min for 2h, centrifuging at 12000r/min for 5min, and drying at 70deg.C for 2h in a drying oven to obtain sodium bentonite.
(2) Adding hexadecyl trimethyl ammonium bromide into the sodium bentonite in the step (1), mixing, stirring for 20 hours, adding acrylamide, azodiisobutyronitrile and N, N-methylene bisacrylamide, heating at 75 ℃ for 2 hours, adding deionized water, washing for 30 minutes, and drying at 50 ℃ for 2 hours to obtain organic bentonite; the proportion of the sodium bentonite, the acrylamide, the azodiisobutyronitrile, the N, N-methylene bisacrylamide and the hexadecyl trimethyl ammonium bromide is 9g:3g:0.2g:0.5g:40mL.
(3) According to the weight proportion, 35kg of cement, 16kg of organic bentonite, 25kg of quartz sand, 10kg of blast furnace slag, 8kg of limestone, 3kg of water-based epoxy resin and 32kg of water are mixed, stirred for 40min at 1600r/min, and then placed into a die for casting molding, so that the water-based pavement brick is prepared.
Example 3-Water-based pavement brick and method for preparing the same
(1) The sodium carbonate solution with the mass fraction of 6 percent and bentonite are mixed according to the mass ratio of 7:200, stirring at 400r/min for 3h, centrifuging at 12000r/min for 3min, and drying at 75deg.C in a drying oven for 1h to obtain sodium bentonite.
(2) Adding hexadecyl trimethyl ammonium bromide into the sodium bentonite in the step (1), mixing, stirring for 24 hours, adding acrylamide, azodiisobutyronitrile and N, N-methylene bisacrylamide, heating at 80 ℃ for 2 hours, adding deionized water, washing for 30 minutes, and drying at 60 ℃ for 2 hours to obtain organic bentonite; the proportion of the sodium bentonite, the acrylamide, the azodiisobutyronitrile, the N, N-methylene bisacrylamide and the hexadecyl trimethyl ammonium bromide is 10g:3g:0.2g:0.6g:45mL.
(3) 40Kg of cement, 20kg of organic bentonite, 30kg of quartz sand, 12kg of blast furnace slag, 10kg of limestone, 5kg of water-based epoxy resin and 35kg of water are mixed according to the weight proportion, stirred for 50min at 1600r/min, and then placed into a die for casting molding, so that the water-based pavement brick is prepared.
Comparative example 1
Comparative example 1 differs from example 2 in that the organobentonite was replaced with bentonite, and the other steps were substantially identical to example 2.
According to the weight proportion, 35kg of cement, 16kg of bentonite, 25kg of quartz sand, 10kg of blast furnace slag, 8kg of limestone, 3kg of water-based epoxy resin and 32kg of water are mixed, stirred for 40min at 1600r/min, and then placed into a die for casting molding, so that the water-based pavement brick is prepared.
Comparative example 2
Comparative example 2 differs from example 2 in that the ratio of sodium bentonite, acrylamide, azobisisobutyronitrile, N-methylenebisacrylamide and hexadecyltrimethyl ammonium bromide in step (2) was adjusted to 10g:10g:0.2g:1g:50mL, other steps were substantially identical to example 2.
(1) The sodium carbonate solution with the mass fraction of 5 percent and bentonite are mixed according to the mass ratio of 6:150, stirring at 300r/min for 2h, centrifuging at 12000 r/min for 5min, and drying at 70deg.C for 2h in a drying oven to obtain sodium bentonite.
(2) Adding hexadecyl trimethyl ammonium bromide into the sodium bentonite in the step (1), mixing, stirring for 20 hours, adding acrylamide, azodiisobutyronitrile and N, N-methylene bisacrylamide, heating at 75 ℃ for 2 hours, adding deionized water, washing for 30 minutes, and drying at 50 ℃ for 2 hours to obtain organic bentonite; the proportion of the sodium bentonite, the acrylamide, the azodiisobutyronitrile, the N, N-methylene bisacrylamide and the hexadecyl trimethyl ammonium bromide is 10g:10g:0.2g:1g:50mL.
(3) According to the weight proportion, 35kg of cement, 16kg of organic bentonite, 25kg of quartz sand, 10kg of blast furnace slag, 8kg of limestone, 3kg of water-based epoxy resin and 32kg of water are mixed, stirred for 40min at 1600r/min, and then placed into a die for casting molding, so that the water-based pavement brick is prepared.
The water-based pavement bricks 20 prepared in examples 1 to 3 and comparative examples 1 to 2 were tested for water permeability coefficient and compressive strength according to JC/T945-2005 water permeable bricks, and the results are shown in Table 1.
TABLE 1 Water permeability coefficient and compressive Strength of the aqueous pavement bricks prepared in examples 1 to 3 and comparative examples 1 to 2
As shown in Table 1, the water-based pavement bricks prepared by the invention have water permeability coefficients of more than 7.2 multiplied by 10 -2 cm·s-1 and compressive strength average values of about 40MPa, and compared with comparative examples 1-2, the water-based pavement bricks prepared by the invention have higher water permeability coefficients and compressive strength, which indicates that the water-based pavement bricks prepared by the invention have better water permeability and compressive strength.
The water-based pavement bricks 25 prepared in examples 1 to 3 and comparative examples 1 to 2 were respectively taken and paved into rectangular areas, a waterproof film was paved under each rectangular area, 20L of sewage containing aluminum ions, zinc ions and copper ions was sprayed on each rectangular area, the sewage was caused to flow through the rectangular areas covered by the water-based pavement bricks, effluent sewage was collected, the metal ion content of the original sewage and the effluent sewage was tested according to the surface water environment quality standard of GB3838-2022, and the metal ion removal percentage was calculated, and the results are shown in Table 2.
TABLE 2 percentage of metal ion removal for aqueous pavement bricks prepared in examples 1 to 3 and comparative examples 1 to 2
As shown in Table 2, the removal rate of aluminum ions and zinc ions of the water-based pavement brick prepared by the invention is more than 90%, and the removal rate of copper ions is more than 75%. Compared with comparative examples 1-2, the water-based pavement brick prepared by the invention has stronger metal ion removal capability and is beneficial to urban surface water quality purification.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (6)
1. The high-permeability pavement brick for adsorbing impurities is characterized by comprising the following raw materials in parts by weight: 35-40 parts of cement, 15-20 parts of organic bentonite, 20-30 parts of quartz sand, 10-12 parts of blast furnace slag, 5-10 parts of limestone, 2-5 parts of adhesive and 25-35 parts of water;
the preparation method of the organic bentonite comprises the following steps:
(1) Adding sodium carbonate solution into bentonite, wherein the mass fraction of the sodium carbonate solution is 5-6%, and the mass ratio of the sodium carbonate solution to the bentonite is 5-7: 100-200, stirring, centrifuging and drying to obtain sodium bentonite;
(2) Adding hexadecyl trimethyl ammonium bromide into sodium bentonite in the step (1), mixing and stirring, and adding acrylamide, azodiisobutyronitrile and N, N-methylene bisacrylamide, wherein the ratio of the sodium bentonite to the acrylamide to the azodiisobutyronitrile to the N, N-methylene bisacrylamide to the hexadecyl trimethyl ammonium bromide is 9-10 g:2 g-3 g:0.1 g-0.2 g:0.5 g-0.6 g:35 mL-45 mL, heating, washing and drying to obtain the organic bentonite.
2. The high water permeability pavement brick of claim 1, comprising the following raw materials in parts by weight: 35 parts of cement, 25 parts of quartz sand, 10 parts of blast furnace slag, 16 parts of organic bentonite, 8 parts of limestone, 3 parts of adhesive and 32 parts of water.
3. The high water permeability pavement brick for adsorbing impurities according to claim 1, wherein in the step (1), the stirring speed is 300-400 r/min, and the stirring is carried out for 2-3 h; the centrifugal speed is 10000-12000 r/min, and the centrifugal speed is 3-5 min; the drying temperature is 70-75 ℃, and the drying is carried out for 1-2 hours.
4. The high water permeability pavement brick for adsorbing impurities according to claim 1, wherein in the step (2), the mixture is stirred for 20 to 24 hours; the heating temperature is 70-80 ℃ and the heating time is 1-2 h; washing for 20-30 min; the drying temperature after washing is 50-60 ℃, and the drying is carried out for 2-3 hours after washing.
5. A high permeability pavement tile as set forth in claim 1 wherein said binder is one or more of an aqueous epoxy resin, an aqueous polyurethane resin and an aqueous acrylic resin.
6. The method for preparing the pavement brick with high water permeability for adsorbing impurities as set forth in claim 5, comprising the steps of: mixing cement, organic bentonite, quartz sand, blast furnace slag, limestone, an adhesive and water, stirring for 40-50 min at 1500-1600 r/min, and pouring and molding to obtain the water-based pavement brick.
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