CN114809336B - Gypsum-cement efficient building insulation board - Google Patents
Gypsum-cement efficient building insulation board Download PDFInfo
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- CN114809336B CN114809336B CN202110114302.1A CN202110114302A CN114809336B CN 114809336 B CN114809336 B CN 114809336B CN 202110114302 A CN202110114302 A CN 202110114302A CN 114809336 B CN114809336 B CN 114809336B
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- gypsum
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- insulation board
- ring
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- 239000004568 cement Substances 0.000 title claims abstract description 78
- 238000009413 insulation Methods 0.000 title claims abstract description 69
- 239000010440 gypsum Substances 0.000 claims abstract description 43
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 43
- 239000010410 layer Substances 0.000 claims description 117
- 239000000835 fiber Substances 0.000 claims description 21
- 230000000712 assembly Effects 0.000 claims description 15
- 238000000429 assembly Methods 0.000 claims description 15
- 239000012774 insulation material Substances 0.000 claims description 11
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 9
- 239000002344 surface layer Substances 0.000 claims description 9
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 229910003460 diamond Inorganic materials 0.000 claims description 3
- 239000010432 diamond Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims 1
- 238000005336 cracking Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 5
- 238000004321 preservation Methods 0.000 description 13
- 210000000056 organ Anatomy 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 238000005187 foaming Methods 0.000 description 8
- 238000010276 construction Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 239000004793 Polystyrene Substances 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 229920002223 polystyrene Polymers 0.000 description 3
- 229920005830 Polyurethane Foam Polymers 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000011496 polyurethane foam Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000006424 Flood reaction Methods 0.000 description 1
- 239000004964 aerogel Substances 0.000 description 1
- 230000002968 anti-fracture Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000010451 perlite Substances 0.000 description 1
- 235000019362 perlite Nutrition 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 229920006327 polystyrene foam Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Acoustics & Sound (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Building Environments (AREA)
Abstract
The invention discloses a gypsum-cement efficient building insulation board, which belongs to the technical field of insulation boards and comprises a cement structure layer, a gypsum structure layer, an insulation board framework and an insulation layer, wherein the gypsum structure layer is arranged outside the insulation layer, the cement structure layer is arranged outside the gypsum structure layer, and the cement structure layer, the gypsum structure layer and the insulation layer are connected with each other through the insulation board framework. The heat-insulating plate skeleton is additionally arranged in the heat-insulating plate, and the heat-insulating plate has high resistance to the force applied by each surface, so that a high-strength and fracture-resistant plate body is formed, the heat-insulating effect is improved, the connection strength of each structural layer is improved, and the cracking and falling of the local plate body and the cracking of the surface of the plate body are avoided.
Description
Technical Field
The invention relates to the technical field of heat-insulating boards, in particular to a gypsum-cement efficient building heat-insulating board.
Background
External wall heat preservation is the key point of building energy-saving work. At present, an insulation board for building external wall insulation mostly adopts an external wall insulation board which takes organic foam plastics such as polystyrene foam, polyurethane hard foam plastics and the like as insulation materials.
Patent number CN201520414680.1 discloses a gypsum-cement insulation board for construction, which comprises two cement protection layers and an intermediate layer between the two cement protection layers, wherein the intermediate layer comprises two foamed phosphogypsum layers and a polystyrene plastic layer between the two foamed phosphogypsum layers. The gypsum-cement heat-insulating board for building adopts the foamed phosphogypsum layer with excellent fireproof performance and the polystyrene plastic layer with good heat-insulating performance to prepare the middle layer, so that the heat-insulating board is fireproof and heat-insulating, and the cement layer with strong rigidity is also adopted for the heat-insulating board, so that the heat-insulating board is firm and durable.
The patent No. CN201711100033.3 discloses a building insulation board made of gypsum board-cement mixed material, which is characterized in that the insulation board is formed by compounding a core board and a protective layer, the core board is made by uniformly distributing compressed air into prepared slurry in the stirring process through a microporous rod-shaped air filter, so that the porous structure slurry is formed, the air charging time is 1-5 minutes, and the building insulation board made of gypsum board-cement mixed material can be manufactured into an inner insulation board of an outer wall of a building with a breaking load of more than or equal to 900N, a volume weight of 400-450kg and a thermal resistance value of more than or equal to 0.5 m.K/W. The heat insulation performance is obviously superior to that of the heat insulation board made of the mixed material in the prior art.
However, the gypsum-cement insulation board has problems of local peeling, chipping, pulverization and overall brittle failure due to oxidation of the structural layer after long-term use, so that the strength of the outer wall after the use of the insulation board is reduced, the reduction degree is improved with the increase of the service life, the insulation performance of the insulation board is also reduced, the rest of the insulation board cannot be connected after the breakage of the insulation board is partially broken, the insulation board is easy to fall, a high-risk area is formed near the outer wall, and the problems are difficult to solve by improving the components of the gypsum board-cement preparation materials.
Disclosure of Invention
The invention aims to provide a gypsum-cement high-efficiency building heat-insulating board, wherein a heat-insulating board framework is additionally arranged in the heat-insulating board, and the heat-insulating board has high resistance to the force applied by each surface, so that a high-strength and fracture-resistant board body is formed, the heat-insulating effect is improved, the connection strength of each structural layer is improved, and the problems of fracture and falling of local board bodies and cracking of the surface of the board body are avoided, so that the problems in the prior art are solved.
In order to achieve the above purpose, the present invention provides the following technical solutions: the gypsum-cement efficient building insulation board comprises a cement structure layer, a gypsum structure layer, an insulation board framework and an insulation layer, wherein the gypsum structure layer is arranged outside the insulation layer, the cement structure layer is arranged outside the gypsum structure layer, and the cement structure layer, the gypsum structure layer and the insulation layer are connected with each other through the insulation board framework;
the heat-insulating plate framework comprises a middle ring assembly, side support assemblies, reinforcing steel bars and connecting pieces, wherein the middle ring assembly is diamond-shaped, the side support assemblies are connected to the two ends of the diamond-shaped, the side support assemblies are of V-shaped opening towards the two sides, the reinforcing steel bars are connected to the two ends of the V-shaped, and the two adjacent middle ring assemblies are connected with each other through the connecting pieces;
the middle ring component consists of two main V-shaped rods and two main rings, the two main V-shaped rods are connected end to end, and the main rings are welded at the joint;
the side support assembly consists of an auxiliary V-shaped rod and two auxiliary circular rings, the auxiliary V-shaped rod is sleeved in the main circular ring, the auxiliary circular rings are welded at the two ends of the auxiliary V-shaped rod, and the auxiliary circular rings are sleeved outside the reinforcing steel bars.
Further, the connecting piece is a ring piece, two main support components are sleeved at the middle part of the ring piece, and the structures of the two main support components and the side support components are consistent.
Further, the auxiliary ring is a single ring body.
Further, the auxiliary ring is composed of four ring bodies and four connecting rods, the ring bodies and the connecting rods are connected in a staggered mode to form a closed ring shape, and a reinforcing steel bar is sleeved in each ring body.
Further, the connecting rod is a linear straight rod.
Further, the connecting rod is a curved arc-shaped rod or a V-shaped rod.
Further, the cement structure layer comprises a concrete surface layer, an organ net and a foaming cement layer, wherein the organ net is arranged in the middle of the foaming cement layer, and the concrete surface layer is coated on the outer portion of the foaming cement layer.
Further, the gypsum structure layer comprises a gypsum layer and a fiber net, a plurality of fiber nets are arranged in the middle of the gypsum layer, gaps exist among the fiber nets, and the width of the fiber net close to the heat preservation layer is smaller than that of the fiber net close to the concrete surface layer.
Further, the heat preservation layer is any one of an organic heat insulation material, an inorganic heat insulation material and a metal heat insulation material.
Further, the gypsum structure layer is a foaming phosphogypsum layer.
Compared with the prior art, the invention has the beneficial effects that: the invention provides a gypsum-cement high-efficiency building heat-insulating board, wherein a heat-insulating board framework is additionally arranged in the heat-insulating board, the heat-insulating board framework extends from the middle part of the heat-insulating board to four corners of the heat-insulating board, so that a cement structure layer, a gypsum structure layer and the heat-insulating layer are connected, the heat-insulating board framework is formed by a plurality of V-shaped rod bodies, the force applied by the V-shaped rod bodies facing each surface has high resistance, so that a high-strength and fracture-resistant board body is formed, the heat-insulating layer is additionally arranged in the middle part of the heat-insulating board, the temperature mutually transferred between the cement structure layers at two sides of the heat-insulating board is blocked, and the heat-insulating effect is improved; the fiber net is used as the connecting layer of the cement structural layer and the gypsum structural layer, so that the connecting strength of each structural layer is improved, and the cracking of the surface of the plate body and the falling of the local plate body due to cracking are avoided.
Drawings
FIG. 1 is a block diagram of an overall construction of a gypsum-cement high-efficiency building insulation board in accordance with a first embodiment of the invention;
FIG. 2 is a diagram showing the construction of a skeleton of a gypsum-cement high-efficiency building insulation board according to the first embodiment of the invention;
FIG. 3 is a block diagram of a connector for a gypsum-cement high-efficiency building insulation board according to a first embodiment of the invention;
FIG. 4 is a construction diagram of a cement structural layer of a gypsum-cement high-efficiency building insulation board according to the first embodiment of the invention;
FIG. 5 is a diagram showing the structure of an organ net of a gypsum-cement high-efficiency building insulation board according to the first embodiment of the invention;
FIG. 6 is a diagram showing the structure of a fiber web of a gypsum-cement high-efficiency building insulation board according to the first embodiment of the invention;
FIG. 7 is a diagram of the main support assembly of a gypsum-cement high-efficiency building insulation board according to a second embodiment of the invention;
FIG. 8 is a block diagram of a gypsum-cement high-efficiency building insulation board in accordance with a third embodiment of the invention;
FIG. 9 is a view showing a secondary ring structure of a gypsum-cement high-efficiency building insulation board according to a third embodiment of the invention;
fig. 10 is a view showing a secondary ring structure of a gypsum-cement high-efficiency building insulation board according to the fourth embodiment of the invention.
In the figure: 1. a cement structural layer; 11. a concrete surface layer; 12. an organ net; 13. foaming the cement layer; 2. a gypsum structural layer; 21. a gypsum layer; 22. a fibrous web; 3. a thermal insulation board skeleton; 31. a middle ring assembly; 311. a main V-bar; 312. a main ring; 32. a side support assembly; 321. an auxiliary V-shaped rod; 322. a secondary ring; 3221. a connecting rod; 33. reinforcing steel bars; 34. a connecting piece; 35. a main support assembly; 4. and a heat preservation layer.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
Referring to fig. 1 to 6, a gypsum-cement efficient building insulation board comprises a cement structure layer 1, a gypsum structure layer 2, an insulation board framework 3 and an insulation layer 4, wherein the gypsum structure layer 2 is arranged outside the insulation layer 4, the cement structure layer 1 is arranged outside the gypsum structure layer 2, and the cement structure layer 1, the gypsum structure layer 2 and the insulation layer 4 are connected with each other through the insulation board framework 3; the gypsum structure layer 2 is a foamed phosphogypsum layer 21.
The heat preservation layer 4 is any one of organic heat insulation material, inorganic heat insulation material and metal heat insulation material, wherein the organic heat insulation material comprises polyurethane foam, polystyrene board and phenolic foam, the inorganic heat insulation material comprises aerogel felt, glass wool, rock wool and expanded perlite, the heat preservation layer 4 is polyurethane foam in the embodiment, the heat preservation layer 4 is additionally arranged in the middle of the heat preservation board, the temperature transferred between the cement structural layers 1 on two sides of the heat preservation board is blocked, and the heat preservation effect is improved.
The heat preservation board skeleton 3 includes zhong subassembly 31, side support subassembly 32, reinforcing bar 33 and connecting piece 34, zhong subassembly 31 is the diamond, the both ends department of diamond all is connected with side support subassembly 32, side support subassembly 32 is the V type that opens to both sides, the both ends of V type all are connected with reinforcing bar 33, connect each other through connecting piece 34 between two adjacent zhong subassemblies 31, connecting piece 34 is the ring spare, the inside heated board skeleton 3 that adds of heated board, this heated board skeleton 3 extends to the heated board four corners by the heated board middle part, thereby connect cement structural layer 1, gypsum structural layer 2 and heat preservation 4, and heated board skeleton 3 is the body of rod of a plurality of V shapes, it all has high resistance to the force that each face was applyed, thereby constitute a high strength, the board body of anti fracture.
The middle ring assembly 31 consists of two main V-shaped rods 311 and two main circular rings 312, wherein the two main V-shaped rods 311 are connected end to end, and the main circular rings 312 are welded at the connection parts;
the side support assembly 32 is composed of an auxiliary V-shaped rod 321 and two auxiliary rings 322, the auxiliary V-shaped rod 321 is sleeved in the main ring 312, the auxiliary rings 322 are welded at two ends of the auxiliary V-shaped rod 321, the auxiliary rings 322 are sleeved outside the steel bars 33, and the auxiliary rings 322 are single ring bodies.
The cement structure layer 1 comprises a concrete surface layer 11, an organ net 12 and a foaming cement layer 13, wherein the organ net 12 is arranged in the middle of the foaming cement layer 13, and the concrete surface layer 11 is coated on the outer part of the foaming cement layer 13.
The gypsum structure layer 2 comprises a gypsum layer 21 and a fiber net 22, a plurality of fiber nets 22 are arranged in the middle of the gypsum layer 21, gaps exist among the fiber nets 22, the width of the fiber net 22 close to the heat preservation layer 4 is smaller than that of the fiber net 22 close to the concrete surface layer 11, the fiber net 22 is used as a connecting layer of the cement structure layer 1 and the gypsum structure layer 2, the connecting strength of each structure layer is improved, and the local plate body is prevented from being broken and falling and the surface of the plate body is prevented from cracking.
Example two
Referring to fig. 7, the difference between the present embodiment and the first embodiment is that two main support assemblies 35 are sleeved in the middle of the connecting piece 34, and the two main support assemblies 35 are consistent with the structure of the side support assemblies 32; the auxiliary ring 322 on the main support assembly 35 is also sleeved outside the steel bar 33, so that the strength of the joint of the two middle ring assemblies 31 is increased.
Example III
Referring to fig. 8 to 9, the auxiliary ring 322 is formed by four ring bodies and four connecting rods 3221, the ring bodies and the connecting rods 3221 are connected in a staggered manner to form a closed ring shape, and each ring body is sleeved with one reinforcing steel bar 33, so long as the framework is not cut or broken, the framework cannot fall even if the structural layer of the insulation board is broken, the framework is bent under the action of force, the person is not injured, the risk is reduced, the connecting rods 3221 are linear straight rods, the distribution range of the auxiliary ring 322 is enlarged, and four corners of the insulation board can be reinforced for the insulation board with thicker thickness and large size, so that each structural layer inside the insulation board is further protected.
Example IV
Referring to fig. 10, the difference between the present embodiment and the third embodiment is that the connecting rod 3221 is not a linear straight rod, but a curved arc rod or V-shaped rod, the rod with a certain radian or angle can increase the strength between two adjacent ring bodies, so that the foamed cement layer 13 can be prevented from being compressed due to bending after the linear straight rod is extruded, the space where the foamed cement layer 13 is located can be maintained not to be compressed, and the foamed cement layer 13 is not deformed.
The preparation process comprises the following steps: selecting a mould, brushing concrete with the thickness of 0.5 cm on the inner wall of the mould, forming the concrete layer into a concrete surface layer, injecting foamed cement with the thickness of 0.5 cm into the mould, placing an organ net 12 into the foamed cement, placing a heat-insulating plate framework 3 into the foamed cement, injecting the foamed cement until the foamed cement floods the organ net 12, injecting gypsum, injecting the gypsum three times or four times, placing a layer of fiber net 22 before each injection, wherein the fiber net 22 is not placed after the last injection, but the heat-insulating layer 4, repeating the operation of injecting the gypsum after the heat-insulating layer 4 is placed, repeating the operation of injecting the foamed cement and placing the organ net 12 after the gypsum is injected, and waiting for solidification and demoulding after the heat-insulating plate structure layer injection is completed.
To sum up: the invention provides a gypsum-cement high-efficiency building heat-insulating board, wherein a heat-insulating board framework 3 is additionally arranged in the heat-insulating board, the heat-insulating board framework 3 extends from the middle part of the heat-insulating board to four corners of the heat-insulating board, so that a cement structural layer 1, a gypsum structural layer 2 and a heat-insulating layer 4 are connected, the heat-insulating board framework 3 is formed by a plurality of V-shaped rod bodies, the force applied by the rod bodies facing each surface has high resistance, thus a high-strength and fracture-resistant board body is formed, the heat-insulating layer 4 is additionally arranged at the middle part of the heat-insulating board, the temperature transmitted between the cement structural layers 1 at two sides of the heat-insulating board is blocked, and the heat-insulating effect is improved; the fiber net 22 is used as a connecting layer of the cement structural layer 1 and the gypsum structural layer 2, so that the connecting strength of each structural layer is increased, and the local plate body is prevented from being broken and falling and the surface of the plate body is prevented from cracking.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should be covered by the protection scope of the present invention by making equivalents and modifications to the technical solution and the inventive concept thereof.
Claims (9)
1. The gypsum-cement efficient building insulation board is characterized by comprising a cement structure layer (1), a gypsum structure layer (2), an insulation board framework (3) and an insulation layer (4), wherein the gypsum structure layer (2) is arranged outside the insulation layer (4), the cement structure layer (1) is arranged outside the gypsum structure layer (2), and the cement structure layer (1), the gypsum structure layer (2) and the insulation layer (4) are connected with each other through the insulation board framework (3);
the heat-insulating plate framework (3) comprises a middle ring assembly (31), side support assemblies (32), reinforcing steel bars (33) and connecting pieces (34), wherein the middle ring assembly (31) is diamond-shaped, the side support assemblies (32) are connected to two ends of the diamond, the side support assemblies (32) are of V-shaped opening towards two sides, the reinforcing steel bars (33) are connected to two ends of each V-shaped, and the two adjacent middle ring assemblies (31) are connected with each other through the connecting pieces (34);
the middle ring assembly (31) consists of two main V-shaped rods (311) and two main rings (312), the two main V-shaped rods (311) are connected end to end, and the main rings (312) are welded at the connection parts;
the side support assembly (32) is composed of an auxiliary V-shaped rod (321) and two auxiliary rings (322), the auxiliary V-shaped rod (321) is sleeved in the main ring (312), the auxiliary rings (322) are welded at the two ends of the auxiliary V-shaped rod (321), and the auxiliary rings (322) are sleeved outside the steel bars (33).
2. A gypsum-cement high-efficiency building insulation board as claimed in claim 1, wherein the connecting member (34) is a ring member, two main support assemblies (35) are sleeved at the middle part of the ring member, and the two main support assemblies (35) are consistent with the side support assemblies (32).
3. A gypsum-cement composite building insulation board as claimed in claim 1, wherein said secondary ring (322) is a unitary ring body.
4. A gypsum-cement high-efficiency building insulation board as claimed in claim 1, wherein the secondary ring (322) is formed by four ring bodies and four connecting rods (3221), the ring bodies and the connecting rods (3221) are connected in a staggered manner to form a closed ring shape, and each ring body is sleeved with one reinforcing steel bar (33).
5. A gypsum-cement high-efficiency building insulation board as claimed in claim 4, wherein said connecting rod (3221) is a linear straight rod.
6. A gypsum-cement high-efficiency building insulation board as claimed in claim 4, wherein the connecting rod (3221) is a curved arc rod or V-shaped rod.
7. A gypsum-cement high-efficiency building insulation board as claimed in claim 1, wherein the gypsum structural layer (2) comprises a gypsum layer (21) and a fiber web (22), a multi-layer fiber web (22) is arranged in the middle of the gypsum layer (21), gaps exist between the multi-layer fiber web (22), and the width of the fiber web (22) close to the insulation layer (4) is smaller than the width of the fiber web (22) close to the concrete surface layer (11).
8. The gypsum-cement efficient building insulation board as claimed in claim 1, wherein the insulation layer (4) is any one of an organic insulation material and an inorganic insulation material.
9. A gypsum-cement high-efficiency building insulation board as claimed in claim 1, wherein the gypsum structural layer (2) is a foamed phosphogypsum layer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110114302.1A CN114809336B (en) | 2021-01-28 | 2021-01-28 | Gypsum-cement efficient building insulation board |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110114302.1A CN114809336B (en) | 2021-01-28 | 2021-01-28 | Gypsum-cement efficient building insulation board |
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| CN114809336A CN114809336A (en) | 2022-07-29 |
| CN114809336B true CN114809336B (en) | 2024-01-16 |
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