CN107805000A - A kind of epoxy water-permeable brick - Google Patents
A kind of epoxy water-permeable brick Download PDFInfo
- Publication number
- CN107805000A CN107805000A CN201711037497.4A CN201711037497A CN107805000A CN 107805000 A CN107805000 A CN 107805000A CN 201711037497 A CN201711037497 A CN 201711037497A CN 107805000 A CN107805000 A CN 107805000A
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- China
- Prior art keywords
- water
- curing agent
- permeable brick
- epoxy
- hydrophily
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Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/10—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C04B26/14—Polyepoxides
-
- 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
- C04B2111/00474—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
Abstract
The invention discloses a kind of epoxy water-permeable brick, belong to building material technical field.The water-permeable brick includes bottom and surface layer, and the surface layer includes following raw material by weight：0.1~0.5 part of 88~96 parts of silica sand, 1.95~6.86 parts of epoxy resin, 0.39~2.05 part of curing agent, 0.5~5.4 part of hydrophily curing agent, 0.05~3.00 part of coupling agent, 0.05~3.00 part of water and nano silicon.By the present invention in that realizing pervious function with hydrophily curing agent and non-hydrophilic resin, compared to prior art, it is easy to get with raw material, technique is simple, and preparation cost is low, ecological, environmental protective；The advantages of water permeability, anti-wear performance, good water retention property.
Description
Technical field
The present invention relates to a kind of water-permeable brick, more particularly to a kind of epoxy water-permeable brick, belong to building material technical field.
Background technology
Water-permeable brick is originating from Holland, during Dutchman encloses Hai Zaocheng, find to arrange the ground after seawater can because
Long Term Contact causes continual surface subsidence less than moisture.Once the dykes and dams on coastline are rushed to open, seawater can be rapid
The city more much lower than sea level is flushed to all to flood whole city of bordering on the sea.In order that ground no longer sinks, Dutchman's manufacture
A kind of small-sized pavior brick of 100 millimeters 50 or 60 millimeters high of 200 mm wide of length is laid on surface of the street, and make brick and brick it
Between reserved 2 millimeters of gap.Rainwater can permeate the ground from the gap between brick when so raining.U.S. Shu Buluoke afterwards
A kind of brick body has been invented by company has the pavior brick of very strong absorbent function in itself.When brick body is filled water, moisture will be to underground
Venting, but the drainage speed of this brick is very slow, what almost is not helped in this brick of the weather of heavy rain, this brick is also called
Make Shu Buluoke pavior bricks.There are Shu Buluoke bricks in the nineties China, and the technical staff of Beijing municipal sector is according to easypro cloth
The principle of Lip river section brick has invented a kind of brick body and has been covered with permeable hole, the good pavior brick of seepage of water in itself.Rainwater can be from brick body
Small hole in flow to underground.
In order to strengthen the resistance to compression of brick body and rupture strength, technical staff adds cement and additive by the use of rubble as raw material to be made
Its permeable speed and intensity can meet the needs of urban pavement, and this brick is exactly the water-permeable brick used on current municipal road surface.
The price of this brick is applied to most of regional engineerings compared with the relatively cheap of ceramic water-permeable brick with ceramic sintering.But this kind of production
Product generally easily block after a protracted use, and water penetration can decline or even disappear, and the easy anti-alkali of product, have a strong impact on
Perception.Therefore, during making, surface layer uses fine grained aggregate, and uses macromolecular adhesive so that the permeable space of brick body reaches one
Fixed tiny rank, the dust in rainwater are difficult to enter brick body, can effectively solve the problem that appeal problem.Silica sand rich reserves, Ke Yitong
Cross screening and obtain superfine sand, the requirement to fine grained aggregate can be met completely.Epoxy resin is cheap, uses amine
Curing agent normal temperature is curable, and thermal deformation shrinkage factor is low after solidification, and weatherability is excellent.From suitable epoxy resin and curing agent
Afterwards, temperature in use is more than 90 DEG C, is a kind of high polymer material for the temperature requirement that can meet pavement usage completely.But only use
The water-permeable brick that common epoxy resin is made, its water permeability are extremely difficult to requirement, it is necessary to add thereto hydrophilic
Property material is to improve the hydrophily of brick body.
Publication No. CN103103904B, entitled " composite water permeable brick and the mixing for making composite water permeable brick top layer
The patent of invention of material ", the colloidality additive i.e. adhesive that the patent uses contain hydrophilic carboxylic acid's salt, sulfonic acid for molecular side chain
Salt, ammonium salt, hydroxyl or main chain contain the hydrophilic matrix tablets of non-ionic hydrophilic segment.But hydrophiling is carried out to epoxy resin
It is modified, obtain having the difficulty of enough hydrophilic matrix tablets larger.Also need to add other inorganic hydrophilics when therefore making product
Material, complex process.
Publication No. CN105439612A, entitled " a kind of fluorine silicon epoxy water-permeable brick and preparation method thereof ", using including
Some including drift-sand are ground into powder as aggregate, pass through sinter molding.Complicated, manufacture difficulty are big, technique is cumbersome；
And be molded by high temperature sintering, power consumption is serious, and environment is adversely affected, and production cost is high.
Therefore, the ecological epoxy brick class product that prior art makes, first, technology difficulty is big and complicated, second, production process
Power consumption is serious, not environmentally friendly enough, and production cost is high.
The content of the invention
Present invention aim to address the problems such as cost existing for water-permeable brick in the prior art is high, power consumption is serious, there is provided one
Kind new epoxy water-permeable brick, selection and specific proportion design by raw material so that water penetration that epoxy water-permeable brick has had,
While anti-wear performance, also there is the advantages of low cost, easily produce.
In order to realize foregoing invention purpose, technical scheme is as follows：
A kind of epoxy water-permeable brick, including bottom and surface layer, it is characterised in that：The surface layer includes following original by weight
Material：88~96 parts of silica sand, 1.95~6.86 parts of epoxy resin, 0.39~2.05 part of curing agent, hydrophily curing agent 0.5~5.4
Part, 0.05~3 part of coupling agent, 0.05~3 part of water and 0.1~0.5 part of nano silicon.
In order to which the present invention is better achieved, further, the sand told is the silica sand that fineness is 40~200 mesh, the fineness
The silica sand of scope, enable to water-permeable brick that there is certain water filtering function.
Further, the curing agent is polynary amine curing agent.
Further, the hydrophily curing agent be strand in the primary amine containing high activity, secondary amine or tertiary amine group, molecule
Main chain or side chain contain the curing agent of hydrophilic radical.
Further, the hydrophily curing agent is polynary modified amine curing agent；What the molecular backbone or side chain contained
Hydrophilic radical is hydroxyl, carboxyl, carboxylate groups, ethers hydrophilic radical.
Further, the molecular weight of the hydrophily curing agent is 300~2000.
Further, the epoxy resin is the epoxy resin such as bisphenol-A, Bisphenol F, bisphenol S, novolac epoxy resin and its changed
At least one of property epoxy resin.
Further, the face stock of the water-permeable brick also includes weatherability additive：0.06~0.18 part of antioxidant,
0.09~0.54 part of ultra-violet absorber.
Further, the face stock of the water-permeable brick also includes 0.1~3.0 part of pigment.
Beneficial effects of the present invention：
Epoxy water-permeable brick made by the present invention, has the effect that：
（1）Compared to prior art, hydrophilic material used in the present invention is hydrophily curing agent, can equally assign product
Excellent water permeability, and hydrophily curing agent such as primary amine class, due to containing the group such as a certain amount of primary amine and ehter bond, having saturating
It is water-based can while, the also effect with toughness reinforcing；In addition, hydrophily curing agent is reactive water wetted material, compared to non-reaction
For property water wetted material, it is not easy to separate out in actual use；After raw material in inventive formulation is used cooperatively, there is one properly
Viscosity, facilitate cloth, production efficiency can be effectively improved.
（2）Preferably, the surface layer of the present invention uses natural fine silica sand as aggregate, without grinding；Normal temperature is curable
Shaping, without sintering；Raw material need to be only added in agitator by different order and stirred during production, the compacting demoulding, normal temperature are solid afterwards
Change, technique are simple.
（3）Preferably, the molecular weight of the hydrophily curing agent in the present invention is 300~2000, the parent in the range of this
Waterborne curing agent, it is in a liquid state under normal temperature, there is enough hydrophilic segments, meet process requirements and hydrophilicity.
（4）Also include weatherability additive in the formula of invention：0.06~0.18 part of antioxidant, ultra-violet absorber
0.09~0.54 part of imparting more preferable weather resistance of water-permeable brick.
Embodiment
The present invention is described in further detail with reference to embodiment, but the implementation of the present invention is not limited to this.
Embodiment 1
A kind of epoxy water-permeable brick, including bed material and fabric, the fabric are made up of following raw material by weight：Silica sand 1936
G, the g of bisphenol A epoxide resin 153.6g, T31 curing agent 45.1, the g of hydrophily curing agent 59.84, coupling agent KH5601.1g, water
2.4 g and through coupling agent modified nano silicon 3.3g.
The fineness of silica sand is 70~120 mesh in the present embodiment.
Curing agent in the present embodiment is polynary amine curing agent phenolic aldehyde amine.
Hydrophily curing agent in the present embodiment is the primary amine containing high activity, secondary amine or tertiary amine group in strand, molecule
Main chain or side chain contain the curing agent of hydrophilic radical, furthermore, it is understood that the hydrophily curing agent of the present embodiment is modified for polyamine
Curing agent, molecular weight 2000.
Epoxy resin in the present embodiment is bisphenol-A.
Embodiment 2
A kind of epoxy water-permeable brick, including bed material and fabric, the fabric are made up of following raw material by weight：Silica sand 1864g,
Epoxy resin 67.6g, curing agent 19g, hydrophily curing agent 21.4g, coupling agent 12g, water 12g and nano silicon 2g.
The fineness of silica sand is 40~70 mesh in the present embodiment.
Curing agent in the present embodiment is polynary amine curing agent polyamide.
Hydrophily curing agent in the present embodiment is the primary amine containing high activity, secondary amine or tertiary amine group in strand, molecule
Main chain or side chain contain the curing agent of hydrophilic radical, furthermore, it is understood that the hydrophily curing agent of the present embodiment is modified for polyamine
Curing agent, molecular weight 2000.
Epoxy resin in the present embodiment is Bisphenol F.
Embodiment 3
A kind of epoxy water-permeable brick, including bed material and fabric, the fabric are made up of following raw material by weight：Silica sand 1800g,
Epoxy resin 92.4g, curing agent 23.2g, hydrophily curing agent 70g, coupling agent 4.4g, water 7.2g and nano silicon
2.8g。
The fineness of silica sand is 40~70 mesh in the present embodiment.
Curing agent in the present embodiment is polynary amine aromatic amine.
Hydrophily curing agent in the present embodiment is the primary amine containing high activity, secondary amine or tertiary amine group in strand, molecule
Main chain or side chain contain the curing agent of hydrophilic radical, furthermore, it is understood that the hydrophily curing agent of the present embodiment is modified for polyamine
Curing agent, molecular weight 600.
Epoxy resin in the present embodiment is bisphenol S.
Embodiment 4
A kind of epoxy water-permeable brick, including bed material and fabric, the fabric are made up of following raw material by weight：Silica sand 1760g,
Epoxy resin 102g, curing agent 21.6g, hydrophily curing agent 100g, coupling agent 3.2g, water 3.2g and nano silicon 10g.
The fineness of silica sand is 40~70 mesh in the present embodiment.
Curing agent in the present embodiment is polynary amine curing agent aliphatic cyclic amine.
Hydrophily curing agent in the present embodiment is the primary amine containing high activity, secondary amine or tertiary amine group in strand, molecule
Main chain or side chain contain the curing agent of hydrophilic radical, furthermore, it is understood that the hydrophily curing agent of the present embodiment is modified for polyamine
Curing agent, molecular weight 600.
Epoxy resin in the present embodiment is novolac epoxy resin.
Embodiment 5
A kind of epoxy water-permeable brick, including bed material and fabric, the fabric are made up of following raw material by weight：Silica sand 1844g,
It is epoxy resin 70g, curing agent 19g, hydrophily curing agent 50.4g, coupling agent 6g, water 5.6g, nano silicon 2g, anti-oxidant
Agent 1.2g and ultra-violet absorber 1.8g.
The fineness of silica sand is 40~70 mesh in the present embodiment.
Curing agent in the present embodiment is the curing agent modified fatty amine of polynary amine.
Hydrophily curing agent in the present embodiment is the primary amine containing high activity, secondary amine or tertiary amine group in strand, molecule
Main chain or side chain contain the curing agent of hydrophilic radical, furthermore, it is understood that the hydrophily curing agent of the present embodiment is modified for polyamine
Curing agent, molecular weight 300.
Epoxy resin in the present embodiment is the block modified glycolylurea epoxide resin of Tween-20.
Bed material in the present embodiment is made up of rubble, Machine-made Sand, cement, high efficiency water reducing agent, water, is formulated as in the prior art
Conventional formulation；The thickness of whole water-permeable brick is 6cm, and wherein surface thickness is 0.8cm.
Embodiment 6
A kind of epoxy water-permeable brick, including bed material and fabric, the fabric include following raw material by weight：Silica sand 1870g, ring
Oxygen tree fat 56.8g, curing agent 14.8g, hydrophily curing agent 37.8g, coupling agent 4g, water 7g, nano silicon 1.6g, antioxygen
Agent 0.8g, ultra-violet absorber 1.6g and pigment 5.6g.
The fineness of silica sand is 40~70 mesh in the present embodiment.
Curing agent in the present embodiment is polynary amine curing agent phenolic aldehyde amine.
Hydrophily curing agent in the present embodiment is the primary amine containing high activity, secondary amine or tertiary amine group in strand, molecule
Main chain or side chain contain the curing agent of hydrophilic radical, furthermore, it is understood that the hydrophily curing agent of the present embodiment is modified for polyamine
Curing agent, molecular weight 900.
Silica sand in the present embodiment is the nano silicon treated by coupling agent KH 560.
Epoxy resin in the present embodiment is bisphenol-A and the mixture of Bisphenol F.Bed material in the present embodiment is by rubble, machine
Sand processed, cement, high efficiency water reducing agent, water composition, are formulated as conventional formulation of the prior art；The thickness of whole water-permeable brick is 6cm,
Wherein surface thickness is 0.8cm.
Embodiment 7
A kind of epoxy water-permeable brick, including bed material and fabric, the fabric include following raw material by weight：Silica sand 2880g, ring
It is oxygen tree fat 58.5g, curing agent 14.7g, hydrophily curing agent 25.5g, coupling agent 6g, water 9g, nano silicon 3g, anti-oxidant
Agent 1.2g and ultra-violet absorber 2.4g and pigment 30g.
The fineness of silica sand is 40~70 mesh in the present embodiment.
Curing agent in the present embodiment is polynary amine curing agent polyamide.
Hydrophily curing agent in the present embodiment is the primary amine containing high activity, secondary amine or tertiary amine group in strand, molecule
Main chain or side chain contain the curing agent of hydrophilic radical, furthermore, it is understood that the hydrophily curing agent of the present embodiment is modified for polyamine
Curing agent, molecular weight 900.Epoxy resin in the present embodiment is novolac epoxy resin.
Silica sand in the present embodiment is the nano silicon treated by coupling agent KH 570.
The preparation method of epoxy water-permeable brick in the present embodiment is as follows：
A, resin is improved：Nano silicon is added in epoxy resin, stirred using homogenizer；
B. prepared by fabric：
B1. silica sand is washed, dry after it is standby；
B2. water and coupling agent are well mixed；
B3. the mixture and pigment of the obtained water of the silica sand after step B1 washing drying and step B2 and coupling agent are stirred
Uniformly, mixture I is obtained；
B4. the epoxy resin after improvement, curing agent, hydrophily curing agent, antioxidant, ultra-violet absorber and pigment are mixed
Uniformly, mixture II is obtained；
B5. mixture II is added in mixture I, it is standby after stirring；
C. prepared by bed material
It is standby after the raw material of bed material is well mixed；
D. cloth
Fabric and bed material are transported to fabric distribution cabins and bed material distribution cabins respectively, first bed material is abound with moulding box, slightly pressed
Tightly so that a part is vacated at the top of moulding box, then fabric is distributed in and vacated in moulding box on bed material, and sprays releasing agent in pressure head,
Finally suppressed；Vibrate press molding, and the demoulding immediately, normal temperature maintenance obtain the epoxy water-permeable brick.
Bed material in the present embodiment is made up of rubble, Machine-made Sand, cement, water reducer, water, and the proportioning formula of raw material is existing
Conventional formulation in technology, the present embodiment provide the formula of a routine：Rubble：45~80%, Machine-made Sand 5~15%, cement 15
~35%, polycarboxylate water-reducer 0.15~0.45%, water 3.9~9%；The thickness of whole water-permeable brick is 6cm, and wherein surface thickness is
0.8cm。
Embodiment 8
Performance test:The water-permeable brick of embodiment 1~7 and control group are subjected to performance comparison, the water-permeable brick of wherein control group includes
Bed material and fabric, the fabric are made up of following raw material by weight：Silica sand 1875g, epoxy resin 85.4g, curing agent
24g, coupling agent 4g, water 7g parts, 1.6 parts of nano silicon, antioxidant 0.8g, ultra-violet absorber 1.6g and pigment
5.6g；Bed material is the same as embodiment 7.
Table 1：Water permeability
Table 2：Water retention property
Table 3：Surface layer anti-wear performance
It is described above, only it is presently preferred embodiments of the present invention, any formal limitation is not done to the present invention, it is every according to this
Any simply modification, the equivalent variations that the technical spirit of invention is made to above example, each fall within protection scope of the present invention
Within.
Claims (9)
1. a kind of epoxy water-permeable brick, including bottom and surface layer, it is characterised in that：The surface layer includes following original by weight
Material：88~96 parts of sand, 1.95~6.98 parts of epoxy resin, 0.49~2.05 part of curing agent, hydrophily curing agent 0.85~5.0
Part, 0.05~0.60 part of coupling agent, 0.05~0.60 part of water and 0.1~0.5 part of nano silicon.
2. epoxy water-permeable brick as claimed in claim 1, it is characterised in that：The sand is the silica sand that fineness is 40~200 mesh.
3. epoxy water-permeable brick as claimed in claim 1, it is characterised in that：The curing agent is polynary amine curing agent.
4. epoxy water-permeable brick as claimed in claim 1, it is characterised in that：The hydrophily curing agent is containing high living in strand
Primary amine, secondary amine or the tertiary amine group of property, molecular backbone or side chain contain the curing agent of hydrophilic radical.
5. epoxy water-permeable brick as claimed in claim 4, it is characterised in that：The hydrophily curing agent is that polyamine is modified solidified
Agent；The hydrophilic radical that the molecular backbone or side chain contain is hydroxyl, carboxyl, carboxylate groups, ethers hydrophilic radical.
6. epoxy water-permeable brick as claimed in claim 5, it is characterised in that：The molecular weight of the hydrophily curing agent be 300~
2000。
7. epoxy water-permeable brick as claimed in claim 1, it is characterised in that：The epoxy resin be bisphenol-A, Bisphenol F, bisphenol S,
At least one of the epoxy resin and its modified epoxy such as novolac epoxy resin.
8. epoxy water-permeable brick as claimed in claim 1, it is characterised in that：The face stock of the water-permeable brick also includes weatherability
Additive：0.06~0.18 part of antioxidant, 0.09~0.54 part of ultra-violet absorber.
9. epoxy water-permeable brick as claimed in claim 1, it is characterised in that：The face stock of the water-permeable brick also include 0.1~
3.0 parts of pigment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711037497.4A CN107805000B (en) | 2017-10-30 | 2017-10-30 | Epoxy brick that permeates water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711037497.4A CN107805000B (en) | 2017-10-30 | 2017-10-30 | Epoxy brick that permeates water |
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| Publication Number | Publication Date |
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| CN107805000A true CN107805000A (en) | 2018-03-16 |
| CN107805000B CN107805000B (en) | 2021-03-26 |
Family
ID=61582557
Family Applications (1)
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| CN201711037497.4A Active CN107805000B (en) | 2017-10-30 | 2017-10-30 | Epoxy brick that permeates water |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109748542A (en) * | 2019-03-08 | 2019-05-14 | 重庆亲禾生态环境科技有限公司 | A kind of color inhibition sand base water-permeable brick and preparation method thereof |
| CN110304863A (en) * | 2019-05-22 | 2019-10-08 | 开化县锦新建筑材料有限公司 | A kind of Ceramic Composite water-permeable brick |
| CN111499266A (en) * | 2020-04-24 | 2020-08-07 | 容七英 | Novel water permeable brick and preparation method thereof |
| CN111908883A (en) * | 2020-07-31 | 2020-11-10 | 上海航烯环保科技有限公司 | Composite binder and permeable surface layer coated particles and permeable material prepared from same |
| CN112095388A (en) * | 2020-09-17 | 2020-12-18 | 福州大学 | Temperature-adaptive water storage and drainage integrated water permeable brick |
| CN112873769A (en) * | 2020-12-23 | 2021-06-01 | 江苏科化新材料科技有限公司 | Method for preparing water permeable brick by using waste plastic package material |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109748542A (en) * | 2019-03-08 | 2019-05-14 | 重庆亲禾生态环境科技有限公司 | A kind of color inhibition sand base water-permeable brick and preparation method thereof |
| CN110304863A (en) * | 2019-05-22 | 2019-10-08 | 开化县锦新建筑材料有限公司 | A kind of Ceramic Composite water-permeable brick |
| CN111499266A (en) * | 2020-04-24 | 2020-08-07 | 容七英 | Novel water permeable brick and preparation method thereof |
| CN111908883A (en) * | 2020-07-31 | 2020-11-10 | 上海航烯环保科技有限公司 | Composite binder and permeable surface layer coated particles and permeable material prepared from same |
| CN112095388A (en) * | 2020-09-17 | 2020-12-18 | 福州大学 | Temperature-adaptive water storage and drainage integrated water permeable brick |
| CN112095388B (en) * | 2020-09-17 | 2021-12-31 | 福州大学 | Temperature-adaptive water storage and drainage integrated water permeable brick |
| CN112873769A (en) * | 2020-12-23 | 2021-06-01 | 江苏科化新材料科技有限公司 | Method for preparing water permeable brick by using waste plastic package material |
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| Publication number | Publication date |
|---|---|
| CN107805000B (en) | 2021-03-26 |
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