CN110451856A - A kind of decoration integrated inner partition plate of precast construction and preparation method thereof - Google Patents
A kind of decoration integrated inner partition plate of precast construction and preparation method thereof Download PDFInfo
- Publication number
- CN110451856A CN110451856A CN201910709766.XA CN201910709766A CN110451856A CN 110451856 A CN110451856 A CN 110451856A CN 201910709766 A CN201910709766 A CN 201910709766A CN 110451856 A CN110451856 A CN 110451856A
- Authority
- CN
- China
- Prior art keywords
- parts
- lightweight concrete
- lightweight
- partition plate
- inner partition
- Prior art date
- 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.)
- Pending
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- 238000005034 decoration Methods 0.000 title claims abstract description 19
- 238000010276 construction Methods 0.000 title claims abstract description 16
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 238000005192 partition Methods 0.000 title claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 11
- 230000002787 reinforcement Effects 0.000 claims abstract description 11
- 239000010959 steel Substances 0.000 claims abstract description 11
- 239000002002 slurry Substances 0.000 claims description 19
- 238000003756 stirring Methods 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 239000000654 additive Substances 0.000 claims description 10
- 230000000996 additive effect Effects 0.000 claims description 10
- 239000004568 cement Substances 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 239000010881 fly ash Substances 0.000 claims description 10
- 239000004088 foaming agent Substances 0.000 claims description 10
- 238000009415 formwork Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 239000003973 paint Substances 0.000 claims description 10
- 239000010802 sludge Substances 0.000 claims description 10
- 239000002562 thickening agent Substances 0.000 claims description 10
- -1 clinker Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 239000002689 soil Substances 0.000 claims description 7
- 230000015271 coagulation Effects 0.000 claims description 6
- 238000005345 coagulation Methods 0.000 claims description 6
- 238000010146 3D printing Methods 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 239000003223 protective agent Substances 0.000 claims description 5
- 239000000741 silica gel Substances 0.000 claims description 5
- 229910002027 silica gel Inorganic materials 0.000 claims description 5
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 230000010354 integration Effects 0.000 abstract description 2
- 238000004904 shortening Methods 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/22—Moulds for making units for prefabricated buildings, i.e. units each comprising an important section of at least two limiting planes of a room or space, e.g. cells; Moulds for making prefabricated stair units
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/38—Treating surfaces of moulds, cores, or mandrels to prevent sticking
- B28B7/384—Treating agents
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/52—Multiple coating or impregnating multiple coating or impregnating with the same composition or with compositions only differing in the concentration of the constituents, is classified as single coating or impregnation
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
- C04B41/61—Coating or impregnation
- C04B41/70—Coating or impregnation for obtaining at least two superposed coatings having different compositions
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/74—Removable non-load-bearing partitions; Partitions with a free upper edge
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses decoration integrated inner partition plate of a kind of precast construction and preparation method thereof, including lightweight concrete wall, the lightweight concrete is embedded with steel reinforcement cage within the walls, and the surface of the lightweight concrete wall is equipped with texture.The present invention is decorating structure integration, exempts from secondary decoration, can save structural wall and build the tedious steps such as wall decoration, the problems such as can effectively shortening and fit up the time, also can avoid the pollution that finishing generates, in addition, the present invention uses novel light once-pouring of concrete, energy conservation and environmental protection and save the cost.
Description
Technical field
The present invention relates to architectural engineering inner wall surface technical field more particularly to a kind of decoration integrated internal partition walls of precast construction
Plate and preparation method thereof.
Background technique
Traditional architecture inner room dividing wall is installed using concrete block masonry, batten；Wall surfacing is in addition to using coating, wallpaper
It, can also be using the method for attachment wall brick except covering.
There is delaminations and blockhouse crack, coating to people for the method that this traditional wall is separated with wall surfacing
Body is harmful, not environmentally, at high cost, long construction period the disadvantages of.Existing market is also rare to decorate two big function knots for curtain wall structure
The novel product being integrated.
Summary of the invention
The purpose of the present invention is to solve disadvantages existing in the prior art, and a kind of precast construction decoration one proposed
Body inner partition plate and preparation method thereof.
To achieve the goals above, present invention employs following technical solutions:
A kind of decoration integrated inner partition plate of precast construction, including lightweight concrete wall, the lightweight concrete bury within the walls
Equipped with steel reinforcement cage, the surface of the lightweight concrete wall is equipped with texture.
Preferably, the texture on lightweight concrete wall surface is produced using decorative cover mold.
A kind of preparation method of the decoration integrated inner partition plate of precast construction, the preparation method the following steps are included:
S1: it is made overmolded texture exemplar using 3D printing technique by selected special texture design scheme；
S2: curing agent is mixed in silica gel, stirs evenly, pours into overmolded exemplar, levelling, decorative cover is produced in demoulding
Mold；
S3: the following component of lightweight concrete slurry: 300-450 parts of cement, 50-120 parts of flyash, 100-350 parts of clinker,
50-180 parts of sludge ceramsite, 9-13 parts of additive, 0.3-0.5 parts of thickener, 2-5 parts of foaming agent, 160-200 parts of water；According to matching
Than by cement, flyash, clinker, sludge ceramsite, 75% water sequentially add blender, stir 1-3 minutes, then will be remaining
Blender is added in 25% water, additive, thickener, foaming agent, stirs 1-3 minutes obtained lightweight concrete slurries；
S4: the processing of formwork erection platform is clean, two decorative cover mold parallel alignments are placed, and is vertically fixed with formwork erection platform,
Aqueous release agent is coated on surface, and vertical laying steel reinforcement cage and built-in fitting, pour lightweight coagulation as needed in two parts mold
Soil paste material；
The processing such as S5: after lightweight concrete slurry condenses a period of time, demoulding, and surface is repaired, solidified, are coated corresponding
The paint of color, paints protective agent.
Preferably, the lightweight concrete slurry setting time is 10-12 hours.
Compared with prior art, the beneficial effects of the present invention are: the present invention is decorating structure integration, exempt from secondary decoration,
Structural wall can be saved and build the tedious steps such as wall decoration, can effectively shorten and fit up the time, also can avoid the pollution that finishing generates
The problems such as, in addition, the present invention uses novel light once-pouring of concrete, energy conservation and environmental protection and save the cost.
Detailed description of the invention
Fig. 1 is structural schematic diagram proposed by the present invention.
In figure: steel reinforcement cage 1, decorative cover mold 2, lightweight concrete wall 3.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.
Referring to Fig.1, the decoration integrated inner partition plate of a kind of precast construction, including lightweight concrete wall 3, lightweight concrete wall
Steel reinforcement cage 1 is embedded in 3, the surface of lightweight concrete wall 3 is equipped with texture.
The texture on 3 surface of lightweight concrete wall is produced using decorative cover mold 2.
Embodiment 1
A kind of preparation method of the decoration integrated inner partition plate of precast construction, the preparation method the following steps are included:
S1: it is made overmolded texture exemplar using 3D printing technique by selected special texture design scheme；
S2: curing agent is mixed in silica gel, stirs evenly, pours into overmolded exemplar, levelling, decorative cover is produced in demoulding
Mold 2；
S3: the following component of lightweight concrete slurry: 300 parts of cement, 50 parts of flyash, 100 parts of clinker, sludge ceramsite 50
Part, 9 parts of additive, 0.3 part of thickener, 2 parts of foaming agent, 160 parts of water；Cement, flyash, clinker, sludge are made pottery according to the proportion
Grain, 75% water sequentially add blender, stir 1 minute, then remaining 25% water, additive, thickener, foaming agent be added
Blender stirs 1 minute obtained lightweight concrete slurry；
S4: the processing of formwork erection platform is clean, two 2 parallel alignments of decorative cover mold are placed, and is vertically fixed with formwork erection platform,
Aqueous release agent is coated on surface, and vertical laying steel reinforcement cage 1 and built-in fitting, pour lightweight coagulation as needed in two parts mold
Soil paste material；
The processing such as S5: after lightweight concrete slurry condenses a period of time, demoulding, and surface is repaired, solidified, are coated corresponding
The paint of color, paints protective agent.
Lightweight concrete slurry setting time is 10 hours.
Embodiment 2
A kind of preparation method of the decoration integrated inner partition plate of precast construction, the preparation method the following steps are included:
S1: it is made overmolded texture exemplar using 3D printing technique by selected special texture design scheme；
S2: curing agent is mixed in silica gel, stirs evenly, pours into overmolded exemplar, levelling, decorative cover is produced in demoulding
Mold 2；
S3: the following component of lightweight concrete slurry: 375 parts of cement, 85 parts of flyash, 225 parts of clinker, sludge ceramsite 115
Part, 11 parts of additive, 04 part of thickener, 3.5 parts of foaming agent, 180 parts of water；According to the proportion by cement, flyash, clinker, sludge
Haydite, 75% water sequentially add blender, stir 2 minutes, then add remaining 25% water, additive, thickener, foaming agent
Enter blender, stirs 2 minutes obtained lightweight concrete slurries；
S4: the processing of formwork erection platform is clean, two 2 parallel alignments of decorative cover mold are placed, and is vertically fixed with formwork erection platform,
Aqueous release agent is coated on surface, and vertical laying steel reinforcement cage 1 and built-in fitting, pour lightweight coagulation as needed in two parts mold
Soil paste material；
The processing such as S5: after lightweight concrete slurry condenses a period of time, demoulding, and surface is repaired, solidified, are coated corresponding
The paint of color, paints protective agent.
Lightweight concrete slurry setting time is 11 hours.
Embodiment 3
A kind of preparation method of the decoration integrated inner partition plate of precast construction, the preparation method the following steps are included:
S1: it is made overmolded texture exemplar using 3D printing technique by selected special texture design scheme；
S2: curing agent is mixed in silica gel, stirs evenly, pours into overmolded exemplar, levelling, decorative cover is produced in demoulding
Mold 2；
S3: the following component of lightweight concrete slurry: 450 parts of cement, 120 parts of flyash, 350 parts of clinker, sludge ceramsite 180
Part, 13 parts of additive, 0.5 part of thickener, 5 parts of foaming agent, 200 parts of water；Cement, flyash, clinker, sludge are made pottery according to the proportion
Grain, 75% water sequentially add blender, stir 3 minutes, then remaining 25% water, additive, thickener, foaming agent be added
Blender stirs 3 minutes obtained lightweight concrete slurries；
S4: the processing of formwork erection platform is clean, two 2 parallel alignments of decorative cover mold are placed, and is vertically fixed with formwork erection platform,
Aqueous release agent is coated on surface, and vertical laying steel reinforcement cage 1 and built-in fitting, pour lightweight coagulation as needed in two parts mold
Soil paste material；
The processing such as S5: after lightweight concrete slurry condenses a period of time, demoulding, and surface is repaired, solidified, are coated corresponding
The paint of color, paints protective agent.
Lightweight concrete slurry setting time is 12 hours.
In this case, using decorative cover mold 2, steel reinforcement cage and built-in fitting are laid in decorative cover mold 2, using lightweight coagulation
Soil paste material one-time-concreting forms, and surface solidified, grinding process, reaches flat and smooth decorative effect.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (4)
1. a kind of decoration integrated inner partition plate of precast construction, including lightweight concrete wall (3), which is characterized in that the lightweight
It is embedded with steel reinforcement cage (1) in concrete walls (3), the surface of the lightweight concrete wall (3) is equipped with texture.
2. the decoration integrated inner partition plate of a kind of precast construction according to claim 1, which is characterized in that the lightweight is mixed
The texture on solidifying cob wall (3) surface is produced using decorative cover mold (2).
3. a kind of preparation method of the decoration integrated inner partition plate of precast construction as described in claim 1, which is characterized in that should
Preparation method the following steps are included:
S1: it is made overmolded texture exemplar using 3D printing technique by selected special texture design scheme；
S2: curing agent is mixed in silica gel, stirs evenly, pours into overmolded exemplar, levelling, demoulding, produce decorative cover mold
(2)；
S3: the following component of lightweight concrete slurry: 300-450 parts of cement, 50-120 parts of flyash, 100-350 parts of clinker, sludge
50-180 parts of haydite, 9-13 parts of additive, 0.3-0.5 parts of thickener, 2-5 parts of foaming agent, 160-200 parts of water；According to the proportion will
Cement, flyash, clinker, sludge ceramsite, 75% water sequentially add blender, stir 1-3 minute, then by remaining 25%
Blender is added in water, additive, thickener, foaming agent, stirs 1-3 minutes obtained lightweight concrete slurries；
S4: the processing of formwork erection platform is clean, two decorative cover mold (2) parallel alignments are placed, and is vertically fixed with formwork erection platform, table
Aqueous release agent is coated in face, and vertical laying steel reinforcement cage (1) and built-in fitting, pour lightweight coagulation as needed in two parts mold
Soil paste material；
The processing such as S5: after lightweight concrete slurry condenses a period of time, demoulding, and surface is repaired, solidified, coat corresponding color
Paint, paint protective agent.
4. the decoration integrated inner partition plate of a kind of precast construction according to claim 3, which is characterized in that the lightweight is mixed
Solidifying soil paste material setting time is 10-12 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910709766.XA CN110451856A (en) | 2019-08-02 | 2019-08-02 | A kind of decoration integrated inner partition plate of precast construction and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910709766.XA CN110451856A (en) | 2019-08-02 | 2019-08-02 | A kind of decoration integrated inner partition plate of precast construction and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110451856A true CN110451856A (en) | 2019-11-15 |
Family
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|---|---|---|---|
| CN201910709766.XA Pending CN110451856A (en) | 2019-08-02 | 2019-08-02 | A kind of decoration integrated inner partition plate of precast construction and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111469266A (en) * | 2020-04-17 | 2020-07-31 | 常州砼筑建筑科技有限公司 | Method for preparing prefabricated logo wall |
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|---|---|---|---|---|
| WO1993010972A1 (en) * | 1991-11-26 | 1993-06-10 | Massachusetts Institute Of Technology | Lightweight composites |
| JPH07233587A (en) * | 1993-12-28 | 1995-09-05 | Nippon Hume Pipe Co Ltd | Light weight concrete and production method thereof and architectural panel by use thereof |
| CN102399444A (en) * | 2010-09-17 | 2012-04-04 | 比亚迪股份有限公司 | Method for preparing fine texture mold |
| CN103304193A (en) * | 2013-06-19 | 2013-09-18 | 河南华泰建材开发有限公司 | Lightweight aggregate foam concrete and production method thereof |
| CN106003415A (en) * | 2016-05-20 | 2016-10-12 | 安徽海龙建筑工业有限公司 | Production process of fabricated lightweight inner partition board |
| CN106396732A (en) * | 2016-08-29 | 2017-02-15 | 王劲松 | High-strength, light-weight and heat-insulation wallboard and production method thereof |
| CN107915446A (en) * | 2017-12-11 | 2018-04-17 | 安徽海龙建筑工业有限公司 | A kind of integrated prefabricated decorative wall panels and its processing technology |
| CN108585640A (en) * | 2018-04-25 | 2018-09-28 | 安徽海龙建筑工业有限公司 | A kind of environment friendly light concrete and preparation method thereof |
| CN109796166A (en) * | 2018-12-20 | 2019-05-24 | 安徽海龙建筑工业有限公司 | A kind of inner partition plate and preparation method thereof of pre-buried light block |
-
2019
- 2019-08-02 CN CN201910709766.XA patent/CN110451856A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993010972A1 (en) * | 1991-11-26 | 1993-06-10 | Massachusetts Institute Of Technology | Lightweight composites |
| JPH07233587A (en) * | 1993-12-28 | 1995-09-05 | Nippon Hume Pipe Co Ltd | Light weight concrete and production method thereof and architectural panel by use thereof |
| CN102399444A (en) * | 2010-09-17 | 2012-04-04 | 比亚迪股份有限公司 | Method for preparing fine texture mold |
| CN103304193A (en) * | 2013-06-19 | 2013-09-18 | 河南华泰建材开发有限公司 | Lightweight aggregate foam concrete and production method thereof |
| CN106003415A (en) * | 2016-05-20 | 2016-10-12 | 安徽海龙建筑工业有限公司 | Production process of fabricated lightweight inner partition board |
| CN106396732A (en) * | 2016-08-29 | 2017-02-15 | 王劲松 | High-strength, light-weight and heat-insulation wallboard and production method thereof |
| CN107915446A (en) * | 2017-12-11 | 2018-04-17 | 安徽海龙建筑工业有限公司 | A kind of integrated prefabricated decorative wall panels and its processing technology |
| CN108585640A (en) * | 2018-04-25 | 2018-09-28 | 安徽海龙建筑工业有限公司 | A kind of environment friendly light concrete and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111469266A (en) * | 2020-04-17 | 2020-07-31 | 常州砼筑建筑科技有限公司 | Method for preparing prefabricated logo wall |
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Application publication date: 20191115 |