CN107253839A - A kind of pavement or square pervious floor tile - Google Patents
A kind of pavement or square pervious floor tile Download PDFInfo
- Publication number
- CN107253839A CN107253839A CN201710521523.4A CN201710521523A CN107253839A CN 107253839 A CN107253839 A CN 107253839A CN 201710521523 A CN201710521523 A CN 201710521523A CN 107253839 A CN107253839 A CN 107253839A
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/02—Agglomerated materials, e.g. artificial aggregates
- C04B18/022—Agglomerated materials, e.g. artificial aggregates agglomerated by an organic binder
-
- 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
- C04B2111/00008—Obtaining or using nanotechnology related 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
- 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
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a kind of pavement or square pervious floor tile, its raw material includes by weight：Useless 20 40 parts of brick, 26 parts of iron tailings, 15 parts of basalt, 28 parts of silicon carbide whisker, 10 16 parts of magnesium borate crystal whisker, 27 parts of glass fibre, 15 parts of weight crystal sand, 28 parts of CNT, 17 parts of barium slag, 15 parts of mullite, 14 parts of Paris white, 16 parts of kaolin, 20 25 parts of auxiliary material.The structure with certain porosity is formed in gained brick structure of the invention, both ensure that fragment of brick had certain mechanical strength, also makes to be formed between fragment of brick and can improve its permeability performance with permeable space.
Description
Technical field
The present invention relates to pervious floor tile technical field, more particularly to a kind of pavement or square pervious floor tile.
Background technology
At present, pavement or the floor tile used in square on the market, are typically all what is made by a kind of identical material, such as use
The cement that cement and sand are made, this brick exist tile surface layer intensity it is not high, easily abrasion, it is difficult to bear weight etc. and ask
Topic.Need a kind of intensity high in the market, the stronger floor tile of infiltration ability, it would be highly desirable to solve.
The content of the invention
The technical problem existed based on background technology, the present invention proposes a kind of pavement or square pervious floor tile, institute
The structure with certain porosity is formed in brick structure, both ensure that fragment of brick had certain mechanical strength, also make fragment of brick it
Between formed its permeability performance can be improved with permeable space.
A kind of pavement proposed by the present invention or square pervious floor tile, its raw material include by weight：Useless brick 20-40
Part, 2-6 parts of iron tailings, 1-5 parts of basalt, 2-8 parts of silicon carbide whisker, 10-16 parts of magnesium borate crystal whisker, 2-7 parts of glass fibre, weight
1-5 parts of crystal sand, 2-8 parts of CNT, 1-7 parts of barium slag, 1-5 parts of mullite, 1-4 parts of Paris white, 1-6 parts of kaolin, auxiliary material
20-25 parts.
Preferably, auxiliary material includes by weight：4-10 parts of cement, 15-20 parts of adhesive, 1-2 parts of water reducer pre-processes ore deposit
10-15 parts of composition granule.
Preferably, adhesive includes by weight：2-4 parts of sodium carboxymethylcellulose, 25-35 parts of epoxy resin, polyurethane
10-20 parts.
Preferably, pretreatment mineral grain is prepared using following technique：By quartz sand, kaolin, sulfuric acid stirring, it is cooled to
Room temperature, adds water stirring, adds urea, formaldehyde and is well mixed, use three ethanoldiamine regulation system pH value for 7.8-8.8, rises
Temperature stirring, adds polysorbas20 and stirs, and adds hollow glass micropearl stirring, and regulation system pH value is 3.2-3.8, stirring
Lower addition sodium metaaluminate, regulation system pH value is washed with water in neutrality, heating stirring, filtering, dry, pulverize and pre-processed
Mineral grain.
Preferably, pretreatment mineral grain is prepared using following technique：It is 92-94wt% by quartz sand, kaolin, concentration
Sulfuric acid stirs 2-4h, and whipping temp is 180-220 DEG C, is cooled to room temperature, adds water stirring 20-30min, and mixing speed is
1200-1400r/min, adds urea, formaldehyde and is well mixed, use three ethanoldiamine regulation system pH value for 7.8-8.8, heat up
To 90-96 DEG C of stirring 1-2h, add polysorbas20 and stir, add hollow glass micropearl stirring 10-20min, mixing speed is
500-540r/min, regulation system pH value is 3.2-3.8, and sodium metaaluminate is added under stirring, regulation system pH value in neutrality,
Be warming up to 90-96 DEG C stirring 1-2h, filtering, be washed with water, 160-180 DEG C dry, pulverize obtain pre-process mineral grain.
Preferably, pretreatment mineral grain is prepared using following technique：By weight by 15-25 parts of quartz sands, 2-8 parts high
Ridge soil, 80-120 parts of concentration are that 92-94wt% sulfuric acid stirs 2-4h, and whipping temp is 180-220 DEG C, is cooled to room temperature, is added
100-200 parts of water stir 20-30min, and mixing speed is 1200-1400r/min, add 4-12 parts of urea, 10-20 parts of formaldehyde and mix
Close uniform, use three ethanoldiamine regulation system pH value for 7.8-8.8, be warming up to 90-96 DEG C of stirring 1-2h, add 4-10 parts and tell
Temperature 20 stirs, and adds 10-16 parts of hollow glass micropearl stirring 10-20min, mixing speed is 500-540r/min, regulation
System pH is 2-4 parts of sodium metaaluminates of addition under 3.2-3.8, stirring, and regulation system pH value is warming up to 90-96 in neutrality
DEG C stirring 1-2h, filtering, be washed with water, 160-180 DEG C dry, pulverize obtain pre-process mineral grain.
The present invention is matched by rationally controlling between each raw material, is made the present invention on the premise of guarantee is excellent in cushion effect, is oozed
It is aqueous fabulous, while not only cost is low using useless brick and the cooperation of other raw materials, and innoxious and recycling utilization can be realized；
Pre-process in mineral grain, quartz sand, kaolin are acidified to form a large amount of holes through persulfuric acid, coordinate urea and by formaldehyde reaction
Afterwards, core shell structure is formed, not only containing a large amount of water-permeable passages, and shell wearability is splendid, after sodium metaaluminate is compounded, and makes pre-
Bond strength is high between processing mineral grain and other components, and interface compatibility is fabulous, hence it is evident that improve mechanical property.
The structure with certain porosity is formed in brick structure of the present invention, both ensure that fragment of brick had certain machinery strong
Degree, also makes to be formed between fragment of brick and can improve its permeability performance with permeable space.
Tensile splitting strength >=4.8Mpa of gained water-permeable brick of the invention, rupture strength is up to 5.2Mpa, coefficient of permeability
0.03 ㎝/s, permeable grade is A grades, meets GB/T 25993-2010《Permeable pavement brick and porous pavement plate》Standard requirement.
Embodiment
Below, technical scheme is described in detail by specific embodiment.
Embodiment 1
A kind of pavement proposed by the present invention or square pervious floor tile, its raw material include by weight：Useless 40 parts of brick, iron
2 parts of mine tailing, 5 parts of basalt, 2 parts of silicon carbide whisker, 16 parts of magnesium borate crystal whisker, 2 parts of glass fibre, 5 parts of weight crystal sand, CNT
2 parts, 7 parts of barium slag, 5 parts of mullite, 1 part of Paris white, 6 parts of kaolin, 20 parts of auxiliary material.
Embodiment 2
A kind of pavement proposed by the present invention or square pervious floor tile, its raw material include by weight：Useless 20 parts of brick, iron
6 parts of mine tailing, 1 part of basalt, 8 parts of silicon carbide whisker, 10 parts of magnesium borate crystal whisker, 7 parts of glass fibre, 1 part of weight crystal sand, CNT
8 parts, 1 part of barium slag, 1 part of mullite, 4 parts of Paris white, 1 part of kaolin, 25 parts of auxiliary material.
Auxiliary material includes by weight：4 parts of cement, 20 parts of adhesive, 1 part of water reducer pre-processes 10 parts of mineral grain.Gluing
Agent includes by weight：4 parts of sodium carboxymethylcellulose, 25 parts of epoxy resin, 20 parts of polyurethane.
Mineral grain is pre-processed to prepare using following technique：By quartz sand, kaolin, sulfuric acid stirring, room temperature is cooled to, plus
Enter water stirring, add urea, formaldehyde and be well mixed, use three ethanoldiamine regulation system pH value for 7.8-8.8, heating stirring,
Add polysorbas20 to stir, add hollow glass micropearl stirring, regulation system pH value is addition under 3.2-3.8, stirring
Sodium metaaluminate, regulation system pH value is washed with water in neutrality, heating stirring, filtering, dry, pulverize and obtains pre-processing mineral
Grain.
Embodiment 3
A kind of pavement proposed by the present invention or square pervious floor tile, its raw material include by weight：Useless 35 parts of brick, iron
3 parts of mine tailing, 4 parts of basalt, 4 parts of silicon carbide whisker, 14 parts of magnesium borate crystal whisker, 4 parts of glass fibre, 4 parts of weight crystal sand, CNT
4 parts, 5 parts of barium slag, 4 parts of mullite, 2 parts of Paris white, 5 parts of kaolin, 22 parts of auxiliary material.
Auxiliary material includes by weight：10 parts of cement, 15 parts of adhesive, 2 parts of water reducer pre-processes 15 parts of mineral grain.Glue
Glutinous agent includes by weight：2 parts of sodium carboxymethylcellulose, 35 parts of epoxy resin, 10 parts of polyurethane.
Mineral grain is pre-processed to prepare using following technique：Quartz sand, kaolin, concentration are stirred for 93wt% sulfuric acid
3h, whipping temp is 200 DEG C, is cooled to room temperature, adds water stirring 25min, mixing speed is 1300r/min, adds urea, first
Aldehyde is well mixed, and uses three ethanoldiamine regulation system pH value for 7.8-8.8, is warming up to 93 DEG C of stirring 1.5h, is added polysorbas20
Stir, add hollow glass micropearl stirring 15min, mixing speed is 520r/min, and regulation system pH value is 3.2-3.8,
Sodium metaaluminate is added under stirring, regulation system pH value is warming up to 93 DEG C of stirring 1.5h in neutrality, and filtering is washed with water,
170 DEG C dry, pulverize obtain pre-process mineral grain.
Embodiment 4
A kind of pavement proposed by the present invention or square pervious floor tile, its raw material include by weight：Useless 25 parts of brick, iron
5 parts of mine tailing, 2 parts of basalt, 6 parts of silicon carbide whisker, 12 parts of magnesium borate crystal whisker, 6 parts of glass fibre, 2 parts of weight crystal sand, CNT
6 parts, 3 parts of barium slag, 2 parts of mullite, 3 parts of Paris white, 2 parts of kaolin, 24 parts of auxiliary material.
Auxiliary material includes by weight：6 parts of cement, 18 parts of adhesive, 1.2 parts of water reducer pre-processes 12 parts of mineral grain.Glue
Glutinous agent includes by weight：3.5 parts of sodium carboxymethylcellulose, 28 parts of epoxy resin, 18 parts of polyurethane.
Mineral grain is pre-processed to prepare using following technique：By weight by 15 parts of quartz sands, 8 parts of kaolin, 80 parts it is dense
Spend and stir 2h for 94wt% sulfuric acid, whipping temp is 220 DEG C, is cooled to room temperature, add 100 parts of water stirring 30min, mixing speed
For 1200r/min, add 12 parts of urea, 10 parts of formaldehyde and be well mixed, use three ethanoldiamine regulation system pH value for 7.8-
8.8,96 DEG C of stirring 1h are warming up to, 10 parts of polysorbas20s is added and stirs, 10 parts of hollow glass micropearl stirring 20min is added, stirs
Speed is mixed for 500r/min, regulation system pH value is 4 parts of sodium metaaluminates of addition, regulation system pH value under 3.2-3.8, stirring
In neutrality, be warming up to 90 DEG C stirring 2h, filtering, be washed with water, 160 DEG C dry, pulverize obtain pre-process mineral grain.
Embodiment 5
A kind of pavement proposed by the present invention or square pervious floor tile, its raw material include by weight：Useless 30 parts of brick, iron
4 parts of mine tailing, 3 parts of basalt, 5 parts of silicon carbide whisker, 13 parts of magnesium borate crystal whisker, 5 parts of glass fibre, 3 parts of weight crystal sand, CNT
5 parts, 4 parts of barium slag, 3 parts of mullite, 2.5 parts of Paris white, 3.5 parts of kaolin, 23 parts of auxiliary material.
Auxiliary material includes by weight：8 parts of cement, 16 parts of adhesive, 1.8 parts of water reducer pre-processes 14 parts of mineral grain.Glue
Glutinous agent includes by weight：2.5 parts of sodium carboxymethylcellulose, 32 parts of epoxy resin, 12 parts of polyurethane.
Mineral grain is pre-processed to prepare using following technique：By weight by 25 parts of quartz sands, 2 parts of kaolin, 120 parts it is dense
Spend and stir 4h for 92wt% sulfuric acid, whipping temp is 180 DEG C, is cooled to room temperature, add 200 parts of water stirring 20min, mixing speed
For 1400r/min, add 4 parts of urea, 20 parts of formaldehyde and be well mixed, use three ethanoldiamine regulation system pH value for 7.8-8.8,
90 DEG C of stirring 2h are warming up to, 4 parts of polysorbas20s is added and stirs, 16 parts of hollow glass micropearl stirring 10min, mixing speed are added
For 540r/min, regulation system pH value is 2 parts of sodium metaaluminates of addition under 3.2-3.8, stirring, during regulation system pH value is in
Property, be warming up to 96 DEG C stirring 1h, filtering, be washed with water, 180 DEG C dry, pulverize obtain pre-process mineral grain.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (6)
1. a kind of pavement or square pervious floor tile, it is characterised in that its raw material includes by weight：Useless 20-40 parts of brick, iron
2-6 parts of mine tailing, 1-5 parts of basalt, 2-8 parts of silicon carbide whisker, 10-16 parts of magnesium borate crystal whisker, 2-7 parts of glass fibre, weight crystal sand
1-5 parts, 2-8 parts of CNT, 1-7 parts of barium slag, 1-5 parts of mullite, 1-4 parts of Paris white, 1-6 parts of kaolin, auxiliary material 20-25
Part.
2. pavement or square pervious floor tile according to claim 1, it is characterised in that auxiliary material includes by weight：Water
4-10 parts of mud, 15-20 parts of adhesive, 1-2 parts of water reducer pre-processes 10-15 parts of mineral grain.
3. pavement or square pervious floor tile according to claim 2, it is characterised in that adhesive includes by weight：
2-4 parts of sodium carboxymethylcellulose, 25-35 parts of epoxy resin, 10-20 parts of polyurethane.
4. pavement or square pervious floor tile according to claim 2, it is characterised in that pretreatment mineral grain is using such as
It is prepared by lower technique：By quartz sand, kaolin, sulfuric acid stirring, room temperature is cooled to, water stirring is added, urea, formaldehyde is added and mixes equal
It is even, three ethanoldiamine regulation system pH value are used for 7.8-8.8, and heating stirring adds polysorbas20 and stirred, adds hollow glass
Glass microballon is stirred, and regulation system pH value is 3.2-3.8, and sodium metaaluminate is added under stirring, and regulation system pH value rises in neutrality
Temperature stirring, filtering is washed with water, and dry, pulverize and obtains pre-processing mineral grain.
5. pavement or square pervious floor tile according to Claims 2 or 3, it is characterised in that pretreatment mineral grain is adopted
Prepared with following technique：It is that 92-94wt% sulfuric acid stirs 2-4h by quartz sand, kaolin, concentration, whipping temp is 180-220
DEG C, room temperature is cooled to, water stirring 20-30min is added, mixing speed is 1200-1400r/min, urea, formaldehyde mixing is added
It is even, three ethanoldiamine regulation system pH value are used for 7.8-8.8, are warming up to 90-96 DEG C of stirring 1-2h, are added polysorbas20 stirring equal
It is even, hollow glass micropearl stirring 10-20min is added, mixing speed is 500-540r/min, and regulation system pH value is 3.2-3.8,
Sodium metaaluminate is added under stirring, regulation system pH value is warming up to 90-96 DEG C of stirring 1-2h in neutrality, and filtering is washed with water
Wash, 160-180 DEG C dry, pulverize obtain pre-process mineral grain.
6. according to any one of the claim 2-4 pavements or square pervious floor tile, it is characterised in that pretreatment mineral
Grain is prepared using following technique：It is 92- by weight by 15-25 parts of quartz sands, 2-8 parts of kaolin, 80-120 parts of concentration
94wt% sulfuric acid stirs 2-4h, and whipping temp is 180-220 DEG C, is cooled to room temperature, adds 100-200 parts of water stirring 20-
30min, mixing speed is 1200-1400r/min, adds 4-12 parts of urea, 10-20 parts of formaldehyde and is well mixed, using three ethanol
Diamines regulation system pH value is 7.8-8.8, is warming up to 90-96 DEG C of stirring 1-2h, adds 4-10 parts of polysorbas20s and stir, add
10-16 parts of hollow glass micropearls stir 10-20min, and mixing speed is 500-540r/min, and regulation system pH value is 3.2-3.8,
2-4 parts of sodium metaaluminates are added under stirring, regulation system pH value is warming up to 90-96 DEG C of stirring 1-2h, filters, use in neutrality
Water washing, 160-180 DEG C dry, pulverize obtain pre-process mineral grain.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710521523.4A CN107253839A (en) | 2017-06-30 | 2017-06-30 | A kind of pavement or square pervious floor tile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710521523.4A CN107253839A (en) | 2017-06-30 | 2017-06-30 | A kind of pavement or square pervious floor tile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107253839A true CN107253839A (en) | 2017-10-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710521523.4A Pending CN107253839A (en) | 2017-06-30 | 2017-06-30 | A kind of pavement or square pervious floor tile |
Country Status (1)
| Country | Link |
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| CN (1) | CN107253839A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108640617A (en) * | 2018-04-26 | 2018-10-12 | 蚌埠市宝运商品混凝土有限公司 | A kind of highly-permeable concrete pervious floor tile |
| CN114230243A (en) * | 2021-12-10 | 2022-03-25 | 柳州市大星混凝土有限公司 | High-durability concrete and preparation method thereof |
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| CN106145858A (en) * | 2016-07-05 | 2016-11-23 | 上海每天节能环保科技股份有限公司 | A kind of ecological permeable bricks and preparation method thereof |
| CN106396489A (en) * | 2016-08-31 | 2017-02-15 | 马鞍山市广立方彩砖有限公司 | Environment-friendly self-cleaning water permeable brick and preparation method thereof |
| CN106747108A (en) * | 2016-12-30 | 2017-05-31 | 安徽华普环境修复材料科技有限公司 | A kind of high intensity pervious concrete brick |
| CN106830896A (en) * | 2016-12-30 | 2017-06-13 | 安徽华普环境修复材料科技有限公司 | A kind of permeable fast inexpensive pervious floor tile |
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2017
- 2017-06-30 CN CN201710521523.4A patent/CN107253839A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20050092210A1 (en) * | 2003-10-30 | 2005-05-05 | Radtke Clifford J.Jr. | Method of forming hydraulic cement protective coatings |
| CN105347732A (en) * | 2015-10-29 | 2016-02-24 | 合肥正拓装饰材料有限公司 | Antifreeze durable resin and concrete composite water-permeable floor tile |
| CN106145858A (en) * | 2016-07-05 | 2016-11-23 | 上海每天节能环保科技股份有限公司 | A kind of ecological permeable bricks and preparation method thereof |
| CN106396489A (en) * | 2016-08-31 | 2017-02-15 | 马鞍山市广立方彩砖有限公司 | Environment-friendly self-cleaning water permeable brick and preparation method thereof |
| CN106747108A (en) * | 2016-12-30 | 2017-05-31 | 安徽华普环境修复材料科技有限公司 | A kind of high intensity pervious concrete brick |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108640617A (en) * | 2018-04-26 | 2018-10-12 | 蚌埠市宝运商品混凝土有限公司 | A kind of highly-permeable concrete pervious floor tile |
| CN114230243A (en) * | 2021-12-10 | 2022-03-25 | 柳州市大星混凝土有限公司 | High-durability concrete and preparation method thereof |
| CN114230243B (en) * | 2021-12-10 | 2022-07-26 | 柳州市大星混凝土有限公司 | High-durability concrete and preparation method thereof |
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Application publication date: 20171017 |