CN112900683A - Fiber-reinforced light flexible concrete wallboard - Google Patents
Fiber-reinforced light flexible concrete wallboard Download PDFInfo
- Publication number
- CN112900683A CN112900683A CN202110088246.9A CN202110088246A CN112900683A CN 112900683 A CN112900683 A CN 112900683A CN 202110088246 A CN202110088246 A CN 202110088246A CN 112900683 A CN112900683 A CN 112900683A
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- Prior art keywords
- rock wool
- core layer
- wool heat
- metal mesh
- preservation
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- 239000011490 mineral wool Substances 0.000 claims abstract description 85
- 239000012792 core layer Substances 0.000 claims abstract description 78
- 239000002184 metal Substances 0.000 claims abstract description 54
- 238000004321 preservation Methods 0.000 claims abstract description 54
- 239000000835 fiber Substances 0.000 claims abstract description 27
- 239000000839 emulsion Substances 0.000 claims abstract description 21
- 230000003187 abdominal effect Effects 0.000 claims abstract description 16
- 239000004576 sand Substances 0.000 claims abstract description 12
- 239000012756 surface treatment agent Substances 0.000 claims abstract description 8
- 239000004568 cement Substances 0.000 claims abstract description 7
- 239000011083 cement mortar Substances 0.000 claims description 19
- 239000010410 layer Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- 239000011230 binding agent Substances 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 4
- 244000007853 Sarothamnus scoparius Species 0.000 claims description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 3
- 238000007667 floating Methods 0.000 claims description 3
- 230000000737 periodic effect Effects 0.000 claims description 3
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 229920001909 styrene-acrylic polymer Polymers 0.000 claims description 3
- 238000004381 surface treatment Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000009736 wetting Methods 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 2
- 238000005452 bending Methods 0.000 abstract description 2
- 238000005336 cracking Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 229920000742 Cotton Polymers 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920006327 polystyrene foam Polymers 0.000 description 2
- 229920002748 Basalt fiber Polymers 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011079 streamline operation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Images
Classifications
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- 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
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
- E04B1/78—Heat insulating elements
- E04B1/80—Heat insulating elements slab-shaped
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/24—Structural elements or technologies for improving thermal insulation
- Y02A30/244—Structural elements or technologies for improving thermal insulation using natural or recycled building materials, e.g. straw, wool, clay or used tires
Abstract
The invention discloses a fiber-reinforced lightweight flexible concrete wallboard, which comprises a rock wool heat-insulating core layer, wherein first metal mesh sheets are respectively arranged on two sides of the rock wool heat-insulating core layer, a gap is reserved between each first metal mesh sheet and the rock wool heat-insulating core layer, the first metal mesh sheets on the two sides are connected through oblique web inserting wires, and the first metal mesh sheets are welded on the oblique web inserting wires, and the fiber-reinforced lightweight flexible concrete wallboard is characterized in that: second metal meshes are further arranged on two sides of the rock wool heat-preservation core layer, the second metal meshes are arranged close to the rock wool heat-preservation core layer, and the second metal meshes are also welded on the inclined inserting abdominal wires; the rock wool heat-preservation core layer is subjected to surface pretreatment, and the surface treatment agent comprises the following components in percentage by mass: organic emulsion, continuous fiber chopped yarn, cement, fine sand 0.1-0.4:0.001-0.05:1: 1; light concrete is poured outside the rock wool heat-insulating core layer subjected to surface pretreatment, so that the bending strength and the tensile strength of the wall board are improved, and the safety performance of the whole wall body system is guaranteed.
Description
Technical Field
The invention relates to the technical field of heat-insulating wallboards, in particular to a fiber-reinforced lightweight flexible concrete wallboard.
Background
Traditional net cotton wallboard includes the heat preservation sandwich layer, and the heat preservation sandwich layer is polystyrene foam, the both sides of heat preservation sandwich layer are provided with the wire mesh respectively, it is gapped between wire mesh and the heat preservation sandwich layer, and the wire mesh of both sides links to each other through inserting the binder wire to one side, the wire mesh welding is on inserting the binder wire to one side. And then the single lightweight concrete wallboard is formed by coating lightweight concrete in a workshop or spraying the lightweight concrete on a construction site. In the existing structure, the lightweight concrete and the heat-insulating core layer have different material properties, and the connection is not strong, so that the strength and the rigidity of the lightweight concrete are seriously insufficient, cracking is easy to occur, and the overall performance of a single wallboard is extremely poor; meanwhile, the wallboard and the wallboard are not effectively connected, and are simply combined, so that an organic whole cannot be formed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a fiber-reinforced lightweight flexible concrete wallboard, which solves the problems that the heat-insulating core layer and concrete are not effectively connected, the strength and the rigidity of the concrete are insufficient, cracking is easy to occur and the like in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a fiber reinforcement light flexible concrete wallboard, includes rock wool heat preservation sandwich layer, the both sides of rock wool heat preservation sandwich layer are provided with first metal mesh piece respectively, gapped between first metal mesh piece and the rock wool heat preservation sandwich layer, the first metal mesh piece of both sides links to each other through inserting the binder silk to one side, first metal mesh piece welding is on inserting the binder silk to one side, its characterized in that: second metal meshes are further arranged on two sides of the rock wool heat-preservation core layer, the second metal meshes are arranged close to the rock wool heat-preservation core layer, and the second metal meshes are also welded on the inclined inserting abdominal wires;
the rock wool heat-preservation core layer is subjected to surface pretreatment, and the surface treatment agent comprises the following components in percentage by mass: organic emulsion, namely continuous fiber chopped yarn, namely cement and fine sand, wherein the ratio of the fine sand to the continuous fiber chopped yarn is 0.1-0.4:0.001-0.05:1:1, the components are mixed into cement mortar, the cement mortar is uniformly coated on the surface of the rock wool heat-preservation core layer, and then the rock wool heat-preservation core layer is naturally dried in the shade;
and pouring lightweight concrete outside the rock wool heat-insulating core layer subjected to surface pretreatment, wherein 3-5kg of continuous fiber chopped yarns are added into each cubic piece of lightweight concrete, and the second metal mesh and the first metal mesh are both positioned in the lightweight concrete.
According to the scheme, the second metal mesh is added on the surface of the rock wool heat-insulation core layer, and is connected with the first metal mesh and the inclined web wires to form an organic whole to fix the rock wool heat-insulation core layer, so that the integrity, the strength and the rigidity of the rock wool heat-insulation core layer are improved. The surface of the rock wool heat-insulating core layer is subjected to surface pretreatment, and the surface treatment agent permeates into the inner side of the surface layer of the rock wool heat-insulating core layer, so that the rock wool heat-insulating core layer and the surface lightweight concrete are combined into a whole, and the strength and the rigidity of the combination are greatly improved. Meanwhile, the addition of the continuous fiber chopped yarns in the concrete enhances the strength and rigidity of the lightweight concrete and solves the problem of cracking of the lightweight concrete.
In the scheme, the method comprises the following steps: the organic emulsion is ethylene-vinyl acetate copolymer emulsion, styrene-acrylic emulsion or acrylic emulsion.
In the scheme, the method comprises the following steps: the surface pretreatment process of the rock wool heat-insulating core layer comprises the following steps:
(1) cleaning floating ash, loose and powdered parts on the surface of the rock wool heat-insulating core layer, and wetting with water;
(2) and uniformly coating the prepared cement mortar on the surface of the rock wool heat-preservation core layer by using a brush or a broom, or filling the prepared cement mortar into a spray gun and uniformly spraying the cement mortar on the surface of the rock wool heat-preservation core layer, wherein the construction temperature is controlled to be above 5 ℃.
In the scheme, the method comprises the following steps: the dosage of the surface treating agent is 0.20-0.30Kg per square meter. The dosage of the flat rock wool heat preservation core layer is about 0.20-0.25 Kg/square meter, and the dosage of the rough rock wool heat preservation core layer is about 0.25-0.30 Kg/square meter. The bonding effect is better.
In the scheme, the method comprises the following steps: the two sides and the middle of the rock wool heat-preservation core layer are uniformly distributed with oblique inserting abdominal wires, the oblique inserting abdominal wires at the two sides are tightly attached to the side surface of the rock wool heat-preservation core layer, and the oblique inserting abdominal wires at the middle pass through the rock wool heat-preservation core layer.
In the scheme, the method comprises the following steps: the first metal mesh and the second metal mesh are formed by longitudinally and transversely connecting metal wires in a warp-weft staggered manner.
In the scheme, the method comprises the following steps: the side edges of the wall panels are provided with periodic recesses or projections, wherein the projections of one wall panel can be inserted into the recesses of the other wall panel. And assembly is facilitated.
Has the advantages that: according to the fiber-reinforced lightweight flexible concrete wallboard, the second metal meshes are additionally arranged on the two sides of the rock wool heat-insulating core layer and are welded through the existing inclined web wires, so that the integrity of the whole wallboard is improved, and the surface pretreatment is performed on the surface of the rock wool heat-insulating core layer, so that the rock wool heat-insulating core layer and lightweight concrete can be effectively connected, the strength and rigidity requirements of a single wallboard are met, the bending strength and the pulling strength of the wallboard are improved, and the safety performance of the whole wallboard system is guaranteed. The effective connection of the rock wool heat-insulating core layer and the lightweight concrete is realized by the additionally arranging the second metal mesh, the surface pretreatment process of the rock wool heat-insulating core layer and the addition of the continuous fiber chopped yarns in the lightweight concrete, the overall strength and the rigidity of a single wallboard are improved, and the cracking problem of the lightweight concrete on the surface of the wallboard is avoided. The invention adopts workshop processing and manufacturing, streamline operation, has high production efficiency and can realize the aim of completely assembling the wall body.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
Fig. 2 is a schematic view of a metal mesh.
Fig. 3 is a schematic view of the recess and the projection.
Detailed Description
The present invention will be described in further detail below by way of specific embodiments:
example 1
As shown in fig. 1-3, the fiber-reinforced lightweight flexible concrete wallboard comprises a rock wool heat-insulating core layer 1, a first metal mesh 4, oblique-inserting abdominal wires 3, a second metal mesh 2, lightweight concrete 5, a groove 6 and a raised head 7.
The rock wool heat preservation core layer 1 is a rock wool heat preservation plate or a polystyrene foam cotton plate, and is preferably a basalt fiber heat preservation cotton plate. The two sides of the rock wool heat-preservation core layer 1 are respectively provided with a first metal mesh sheet 4, a gap is reserved between the first metal mesh sheet 4 and the rock wool heat-preservation core layer 1, the first metal mesh sheets 4 on the two sides are connected through oblique inserting abdominal wires 3, the first metal mesh sheets 4 are welded on the oblique inserting abdominal wires 3, the oblique inserting abdominal wires 3 are distributed on the two sides and the middle of the rock wool heat-preservation core layer 1 in an evenly distributed mode, the oblique inserting abdominal wires 3 on the two sides are tightly attached to the side face of the rock wool heat-preservation core layer 1, and the oblique inserting abdominal wires 3 in the middle penetrate through the rock wool heat-preservation core. The two sides of the rock wool heat-preservation core layer 1 are also provided with second metal mesh sheets 2, the second metal mesh sheets 2 are tightly attached to the rock wool heat-preservation core layer 1, the second metal mesh sheets 2 are also welded on the inclined inserting abdominal wires 3, and the first metal mesh sheets 4 and the second metal mesh sheets 2 are made of metal materials and are formed by longitudinally and transversely staggered metal wires in a warp-weft mode.
The surface pretreatment is carried out on the rock wool heat-insulating core layer, and the surface treatment agent comprises the following components in percentage by mass: organic emulsion, namely continuous fiber chopped yarn, cement and fine sand, wherein the ratio of the continuous fiber chopped yarn to the fine sand is 0.1:0.001:1:1, the components are mixed into cement mortar, then the cement mortar is uniformly coated on the surface of the rock wool heat-preservation core layer, and then the rock wool heat-preservation core layer is naturally dried in the shade; the organic emulsion is ethylene-vinyl acetate copolymer emulsion.
The specific process for performing surface pretreatment on the rock wool heat-insulating core layer comprises the following steps:
(1) and (4) cleaning floating ash, loose and pulverized parts on the surface of the rock wool heat-insulating core layer, and wetting with water.
(2) And uniformly coating the prepared cement mortar on the surface of the rock wool heat-preservation core layer by using a brush or a broom, or filling the prepared cement mortar into a spray gun and uniformly spraying the cement mortar on the surface of the rock wool heat-preservation core layer, wherein the construction temperature is controlled to be above 5 ℃. The dosage of the surface treating agent is 0.20-0.30Kg per square meter. Specifically, according to the flatness of the rock wool heat-insulating core layer, the dosage of the flat rock wool heat-insulating core layer is about 0.20-0.25 Kg/square meter, and the dosage of the rough rock wool heat-insulating core layer is about 0.25-0.30 Kg/square meter.
And (3) pouring lightweight concrete outside the rock wool heat-insulating core layer subjected to surface pretreatment, adding 3kg of continuous fiber chopped yarns into the lightweight concrete according to each cubic concrete, and positioning the second metal mesh and the first metal mesh in the lightweight concrete 5.
The side edges of the wall panels are provided with periodic recesses 6 or projections 7, wherein the projection 7 of one wall panel can be inserted into the recess 6 of the other wall panel.
Example 2
The rest is the same as in example 1, except that: the surface pretreatment is carried out on the rock wool heat-insulating core layer, and the surface treatment agent comprises the following components in percentage by mass: organic emulsion, namely continuous fiber chopped yarn, namely cement and fine sand, wherein the ratio of the continuous fiber chopped yarn to the fine sand is 0.4:0.05:1:1, the components are mixed into cement mortar, the cement mortar is uniformly coated on the surface of the rock wool heat-preservation core layer, and then the rock wool heat-preservation core layer is naturally dried in the shade; the organic emulsion is acrylic emulsion.
And pouring lightweight concrete outside the rock wool heat-insulating core layer subjected to surface pretreatment, wherein 4kg of continuous fiber chopped yarns are added into the lightweight concrete according to each cubic concrete, and the second metal mesh sheet and the first metal mesh sheet are both positioned in the lightweight concrete.
Example 3
The rest is the same as in example 1, except that: the surface pretreatment is carried out on the rock wool heat-insulating core layer, and the surface treatment agent comprises the following components in percentage by mass: organic emulsion, namely continuous fiber chopped yarn, namely cement and fine sand, wherein the ratio of the fine sand to the continuous fiber chopped yarn is 0.3:0.02:1:1, the components are mixed into cement mortar, the cement mortar is uniformly coated on the surface of the rock wool heat-preservation core layer, and then the rock wool heat-preservation core layer is naturally dried in the shade; the organic emulsion is styrene-acrylic emulsion.
And (3) pouring lightweight concrete outside the rock wool heat-insulating core layer subjected to surface pretreatment, adding 5kg of continuous fiber chopped yarns into the lightweight concrete according to each cubic concrete, and positioning the second metal mesh and the first metal mesh in the lightweight concrete.
The wallboard of the embodiment 1-3 of the invention is subjected to a tensile strength test, and the comparative analysis is carried out on the wallboard a obtained by pouring the lightweight concrete without surface treatment of the rock wool heat-insulating core layer, the wallboard b obtained by pouring the lightweight concrete after the rock wool heat-insulating core layer is pretreated by the existing interface agent, and the wallboard c obtained by pouring the lightweight concrete after the surface treatment agent prepared by organic emulsion, cement and fine sand is subjected to surface pretreatment, wherein the structures of all the wallboards are the structures of the embodiment 1, and only the surface treatment of the rock wool heat-insulating core layer is different. The experimental result is as follows: the tensile strengths of examples 1-3 were 339KPa, 331KPa, 336KPa, respectively, the tensile strength of wallboard a was 252KPa, the tensile strength of wallboard b was 289KPa, and the tensile strength of wallboard c was 293 KPa. Therefore, after surface pretreatment of special proportion, the strength and rigidity of the combined fiber reinforced lightweight flexible concrete wallboard are obviously enhanced, cracks are not generated any more, the rock wool heat insulation layer is not subjected to interface treatment, the bonding force is very small, and the manufactured wallboard has great potential safety hazards.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (7)
1. The utility model provides a fiber reinforcement light flexible concrete wallboard, includes rock wool heat preservation sandwich layer, the both sides of rock wool heat preservation sandwich layer are provided with first metal mesh piece respectively, gapped between first metal mesh piece and the rock wool heat preservation sandwich layer, the first metal mesh piece of both sides links to each other through inserting the binder silk to one side, first metal mesh piece welding is on inserting the binder silk to one side, its characterized in that: second metal meshes are further arranged on two sides of the rock wool heat-preservation core layer, the second metal meshes are arranged close to the rock wool heat-preservation core layer, and the second metal meshes are also welded on the inclined inserting abdominal wires;
the rock wool heat-preservation core layer is subjected to surface pretreatment, and the surface treatment agent comprises the following components in percentage by mass: organic emulsion, namely continuous fiber chopped yarn, namely cement and fine sand, wherein the ratio of the fine sand to the continuous fiber chopped yarn is 0.1-0.4:0.001-0.05:1:1, the components are mixed into cement mortar, the cement mortar is uniformly coated on the surface of the rock wool heat-preservation core layer, and then the rock wool heat-preservation core layer is naturally dried in the shade;
and pouring lightweight concrete outside the rock wool heat-insulating core layer subjected to surface treatment, wherein 3-5kg of continuous fiber chopped yarns are added into the lightweight concrete per cubic meter, and the second metal mesh and the first metal mesh are both positioned in the lightweight concrete.
2. The fiber reinforced lightweight flexible concrete wallboard of claim 1, wherein: the organic emulsion is ethylene-vinyl acetate copolymer emulsion, styrene-acrylic emulsion or acrylic emulsion.
3. The fiber reinforced lightweight flexible concrete wallboard of claim 1 or 2, wherein the surface pretreatment process of the rock wool heat preservation core layer is as follows:
(1) cleaning floating ash, loose and powdered parts on the surface of the rock wool heat-insulating core layer, and wetting with water;
(2) and uniformly coating the prepared cement mortar on the surface of the rock wool heat-preservation core layer by using a brush or a broom, or filling the prepared cement mortar into a spray gun and uniformly spraying the cement mortar on the surface of the rock wool heat-preservation core layer, wherein the construction temperature is controlled to be above 5 ℃.
4. The fiber reinforced lightweight flexible concrete wallboard of claim 3, wherein: the dosage of the surface treating agent is 0.20-0.30Kg per square meter.
5. The fiber reinforced lightweight flexible concrete wallboard of claim 4, wherein: the two sides and the middle of the rock wool heat-preservation core layer are uniformly distributed with oblique inserting abdominal wires, the oblique inserting abdominal wires at the two sides are tightly attached to the side surface of the rock wool heat-preservation core layer, and the oblique inserting abdominal wires at the middle pass through the rock wool heat-preservation core layer.
6. The fiber reinforced lightweight flexible concrete wallboard of claim 5, wherein: the first metal mesh and the second metal mesh are formed by longitudinally and transversely connecting metal wires in a warp-weft staggered manner.
7. The fiber reinforced lightweight flexible concrete wallboard of claim 6, wherein: the side edges of the wall panels are provided with periodic recesses or projections, wherein the projections of one wall panel can be inserted into the recesses of the other wall panel.
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CN202110088246.9A CN112900683A (en) | 2021-01-22 | 2021-01-22 | Fiber-reinforced light flexible concrete wallboard |
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CN202110088246.9A CN112900683A (en) | 2021-01-22 | 2021-01-22 | Fiber-reinforced light flexible concrete wallboard |
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2021
- 2021-01-22 CN CN202110088246.9A patent/CN112900683A/en active Pending
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