CN110700480A - Light high-strength prefabricated slab for building - Google Patents

Light high-strength prefabricated slab for building Download PDF

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Publication number
CN110700480A
CN110700480A CN201910849581.9A CN201910849581A CN110700480A CN 110700480 A CN110700480 A CN 110700480A CN 201910849581 A CN201910849581 A CN 201910849581A CN 110700480 A CN110700480 A CN 110700480A
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CN
China
Prior art keywords
prefabricated
slab
cement
reinforcing
prefabricated plate
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
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CN201910849581.9A
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Chinese (zh)
Inventor
张子明
王伟
杨新华
黄利勇
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Hunan Zhongfu Hangxiao Construction Technology Co Ltd
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Hunan Zhongfu Hangxiao Construction Technology Co Ltd
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Publication date
Application filed by Hunan Zhongfu Hangxiao Construction Technology Co Ltd filed Critical Hunan Zhongfu Hangxiao Construction Technology Co Ltd
Priority to CN201910849581.9A priority Critical patent/CN110700480A/en
Publication of CN110700480A publication Critical patent/CN110700480A/en
Pending legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04CSTRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/04Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres
    • E04C2/044Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres of concrete
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04CSTRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/04Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres
    • E04C2/06Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres reinforced
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04CSTRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/30Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
    • E04C2/38Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure with attached ribs, flanges, or the like, e.g. framed panels

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Panels For Use In Building Construction (AREA)

Abstract

The invention belongs to the technical field of building boards, and particularly relates to a light high-strength prefabricated board for a building, which comprises a prefabricated board frame, wherein a prefabricated board filling cavity is arranged inside the prefabricated board frame, a cement board, a reinforcing rib, a reinforcing steel wire mesh and a circular cavity pipe are sequentially arranged at the top end inside the prefabricated board filling cavity, and the cement board, the reinforcing rib and the reinforcing steel wire mesh are respectively and symmetrically distributed at the top end and the bottom end of the circular cavity pipe; adopt double-deck strengthening rib and enhancement wire net to combine together, the prefabricated plate of making has good hardness and intensity, can strengthen the bulk strength of circular cavity pipe distribution position department, the overall stability of reinforcing prefabricated plate, avoid leading to the local comparatively fragile condition that appears of prefabricated plate because of the distribution of circular cavity pipe, the holistic fastness of reinforcing prefabricated plate, the strengthening rib all adopts cold-drawn low carbon steel with the enhancement wire net, combine the inside high strength lightweight aggregate core of establishing that adds of cement slab, can strengthen the whole fastness of cement slab.

Description

Light high-strength prefabricated slab for building
Technical Field
The invention belongs to the technical field of building boards, and particularly relates to a light high-strength prefabricated slab for buildings.
Background
With the development of the construction industry more and more rapidly, a plurality of novel building materials appear. And these pairs of building materials can create better and more perfect buildings. Among them, cement precast slabs are one of the most typical materials. The cement precast slabs are prefabricated walls formed by Portland cement and steel bar keels, are slabs manufactured by templates and are named as cement precast slabs, the cement precast slabs are slabs used in early buildings, are modules or slabs used in engineering, concrete precast slabs produced and formed in a precast yard are directly transported to a construction site for installation, the cement precast slabs are called as precast slabs, when the precast slabs are manufactured, hollow models are nailed by wood plates, steel bars are distributed in hollow parts of the models, the hollow parts are filled with cement, the wood plates are knocked off after the concrete precast slabs are dried, the residual precast slabs are left, the precast slabs are used for construction, such as cement slabs covered on ditches beside roads, cement slabs used as heat insulation layers on roofs are all precast slabs, horizontal joints and vertical joints exist among precast components in the manufactured concrete structure, and the stress performance of the joints determines the overall performance of the structure, the existing prefabricated concrete structure joint construction measures generally pursue to achieve the same effect as cast-in-place concrete, but because the new and old concrete joint surfaces at the joint are weak links, the stress performance is influenced, and the joint is easy to crack, so that the normal use is influenced.
Traditional prefabricated plate is when the preparation, and the structure is comparatively simple, in order to reduce the weight of component, generally arranges the hole in prefabricated component, forms the hollow core slab, and the bearing capacity of hollow core slab still exists some less than solid slab, and hollow cavity position department is comparatively fragile, if the construction treatment is improper then cause the floor fracture easily when the building subsides, leaks, and the structural strength of cement prefabricated plate is low, uses the building body of cement prefabricated plate to be destroyed easily.
Disclosure of Invention
To solve the problems set forth in the background art described above. The invention provides a light high-strength precast slab for buildings, which has the characteristics of simple and reasonable structure, safe and stable use, firmness, durability and long service life.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a light-duty high strength prefabricated plate for building, includes the prefabricated plate frame, the inside of prefabricated plate frame has the prefabricated plate and fills and hold the chamber, the inside top that the prefabricated plate was filled and is held the chamber is equipped with cement board, strengthening rib, enhancement wire net and circular cavity pipe in proper order, cement board, strengthening rib and enhancement wire net respectively symmetric distribution are in the top and the bottom of circular cavity pipe.
Preferably, a reinforcing core material is added into the cement board, the cement board is of a cuboid structure, the cross-sectional area of the cement board is equal to the cross-sectional area of the prefabricated board frame, the cement board is in mixed connection with the reinforcing core material, and the cement board is integrally cast.
Preferably, the reinforcing ribs comprise transverse reinforcing ribs and vertical reinforcing ribs, the transverse reinforcing ribs and the vertical reinforcing ribs are distributed in a crossed mode in a cross mode, connecting clamping grooves are formed in the vertical reinforcing ribs, and connecting clamping shafts matched with the connecting clamping grooves are arranged on the transverse reinforcing ribs.
Preferably, the inner side wall of the precast slab frame is provided with the connecting clamp shaft matched with the connecting clamp grooves on the transverse reinforcing ribs and the vertical reinforcing ribs, and the connecting clamp shaft and the connecting clamp grooves are in an I-shaped structure.
Preferably, the reinforced steel wire mesh is of a square mesh structure and is made of cold-drawn low-carbon steel.
Preferably, the number of circular cavity pipe is a plurality of, a plurality of circular cavity pipe equidistance horizontal distribution is in prefabricated plate frame's inside two strengthen the intermediate position department of wire net.
Preferably, the prefabricated plate frame is internally provided with two reinforcing steel wire meshes, reinforcing ribs are fixedly arranged on the outer sides of the reinforcing steel wire meshes, a cement plate is poured and formed on the outer sides of the reinforcing ribs, and the prefabricated plate frame is made of light steel.
Preferably, the cement board is made by mixing polymer anti-crack mortar with the reinforced core material, and the reinforced core material is a high-strength lightweight aggregate core material.
Compared with the prior art, the invention has the beneficial effects that:
the light high-strength precast slab for the building adopts the combination of the double-layer reinforcing ribs and the reinforced steel wire mesh, has good hardness and strength, and the hardness and the strength at the distribution position of the circular cavity pipe can be enhanced through combining the double-layer reinforcing ribs with the reinforcing steel wire mesh, the integral stability of the prefabricated plate is enhanced, the situation that the prefabricated plate is locally fragile due to the distribution of the circular cavity pipe is avoided, the firmness of the whole prefabricated slab is enhanced, the service stability of the prefabricated slab is enhanced, the service life of the prefabricated slab is prolonged, and the reinforcing ribs and the reinforcing steel wire meshes are both made of cold-drawn low-carbon steel, the high-strength lightweight aggregate core material arranged inside the cement board is combined, the firmness and stability of the whole cement board can be enhanced, the prefabricated board frame is made of light steel, the reinforcing ribs and the cold-drawn low-carbon steel of the reinforcing steel wire meshes are combined, and the whole weight of the prefabricated board can be reduced under the condition of enhancing the overall strength of the prefabricated board.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic top sectional view of the present invention;
FIG. 3 is an enlarged detail view of FIG. 1A;
fig. 4 is a schematic diagram of the overall explosion structure in the present invention.
In the figure: 1. prefabricating a plate frame; 101. filling the cavity with the prefabricated plate; 2. a cement board; 21. reinforcing the core material; 3. reinforcing ribs; 31. transverse reinforcing ribs; 311. connecting the clamp shaft; 32. a vertical reinforcing rib; 321. a connecting clamping groove; 4. a circular cavity tube; 5. and reinforcing the steel wire mesh.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides the following technical solutions: the utility model provides a light-duty high strength prefabricated plate for building, includes prefabricated plate frame 1, and prefabricated plate frame 1's inside has the prefabricated plate and fills appearance chamber 101, and the inside top that the prefabricated plate was filled appearance chamber 101 is equipped with cement board 2, strengthening rib 3 in proper order, is strengthened wire net 5 and circular cavity pipe 4, and cement board 2, strengthening rib 3 and enhancement wire net 5 respectively symmetric distribution are at the top and the bottom of circular cavity pipe 4.
In this embodiment: the inside top that holds chamber 101 is filled to the prefabricated plate is equipped with cement board 2 in proper order, strengthening rib 3, strengthen wire net 5 and circular cavity pipe 4, cement board 2, strengthening rib 3 and the top and the bottom of strengthening wire net 5 difference symmetric distribution at circular cavity pipe 4, adopt double-deck strengthening rib 3 and strengthen wire net 5 and combine together, the prefabricated plate of making has good hardness and intensity, and combine together with strengthening wire net 5 through double-deck strengthening rib 3, can strengthen hardness and the intensity of circular cavity pipe 4 distribution position department, strengthen the overall stability of prefabricated plate, avoid because of circular cavity pipe 4's distribution, lead to the local comparatively fragile condition that appears of prefabricated plate, strengthen the holistic fastness of prefabricated plate.
Specifically, a reinforced core material 21 is added in the cement board 2, the cement board 2 is of a cuboid structure, the cross-sectional area of the cement board 2 is equal to the cross-sectional area of the interior of the prefabricated board frame 1, the cement board 2 is made by mixing polymer anti-crack mortar with the reinforced core material 21, the cement board 2 is integrally cast, and the reinforced core material 21 is a high-strength lightweight aggregate core material; the reinforced core material 21 is added into the raw materials for the cement board 2 after pouring and solidification, so that the strength of the whole cement board 2 is higher, the firmness, the crack resistance and the solidification performance of the whole cement board 2 can be enhanced, the cement board is not easy to break and damage, and the service life is long.
Specifically, the reinforcing ribs 3 comprise transverse reinforcing ribs 31 and vertical reinforcing ribs 32, the transverse reinforcing ribs 31 and the vertical reinforcing ribs 32 are distributed in a crossed manner, the vertical reinforcing ribs 32 are provided with connecting clamping grooves 321, and the transverse reinforcing ribs 31 are provided with connecting clamping shafts 311 matched with the connecting clamping grooves 321; the strengthening rib 3 adopts the structure of horizontal strengthening rib 31 and the mutual staggered connection of vertical strengthening rib 32, connects inseparabler, and difficult dislocation drops, combines the cement board 2 of pouring on the strengthening rib 3 for the connection between horizontal strengthening rib 31 and the vertical strengthening rib 32 is fixed more stably, and horizontal strengthening rib 31 can disperse the holistic bearing capacity of prefabricated plate to each position with the crisscross distribution of vertical strengthening rib 32, thereby makes the bearing capacity of prefabricated plate stronger.
Specifically, the inner side wall of the prefabricated plate frame 1 is provided with a connecting clamp shaft 311 matched with the connecting clamp grooves 321 on the transverse reinforcing ribs 31 and the vertical reinforcing ribs 32, and the connecting clamp shaft 311 and the connecting clamp grooves 321 are in an I-shaped structure; the connecting structure is used for connecting the transverse reinforcing ribs 31 and the vertical reinforcing ribs 32 more tightly, and is convenient to install.
Specifically, the number of the circular cavity pipes 4 is a plurality, the circular cavity pipes 4 are horizontally distributed in the middle of two reinforcing steel wire meshes 5 in the prefabricated plate frame 1 at equal intervals, the reinforcing steel wire meshes 5 are of square grid structures, and the reinforcing steel wire meshes 5 are made of cold-drawn low-carbon steel; can play good spacing effect to inside circular cavity pipe 4, and cement thick liquids see through the mesh of strengthening on the wire net 5 and permeate circular cavity pipe 4 and strengthen between the wire net 5, the strengthening rib 3 that the combination was strengthened on the wire net 5 makes outside effort can not directly contact with circular cavity pipe 4, avoid because of circular cavity pipe 4's position is because of hollow structure bearing capacity is relatively weak, the problem of easy fracture damage, safety and stability in utilization, long service life, high adaptability, wide application range.
Specifically, reinforcing ribs 3 are fixedly arranged on the outer sides of two reinforcing steel wire meshes 5 in a prefabricated plate frame 1, a cement plate 2 is cast and molded on the outer sides of the reinforcing ribs 3, and the prefabricated plate frame 1 is made of light steel; the combined structure of the reinforcing ribs 3 and the cement board 2 is firm and durable in structure, long in service life and difficult to break and damage, the light steel material of the prefabricated board frame 1 is light in weight and convenient to transport and carry, the reinforcing ribs 3 and the reinforcing steel wire meshes 5 made of cold-drawn low-carbon steel materials are adopted, the combined structure not only has good hardness, toughness, bearing capacity and good impact resistance, but also improves the overall hardness and bearing capacity of the prefabricated board, and is convenient to use, safe, stable, wide in application range, long in service life and difficult to break and damage.
The working principle and the using process of the invention are as follows: firstly, a prefabricated plate frame 1 is placed at a prefabricated plate processing position, then cement slurry is poured into the prefabricated plate frame 1, reinforcing ribs 3 and reinforcing steel wire meshes 5 are sequentially placed on the cement slurry, finally, circular cavity pipes 4 are horizontally arranged in a prefabricated plate filling cavity 101, then, the reinforcing steel wire meshes 5 and the reinforcing ribs 3 are sequentially arranged in the prefabricated plate filling cavity 101 and positioned above the circular cavity pipes 4, finally, the cement slurry is poured into the prefabricated plate frame 1, standing is carried out for the cement slurry to be fused and solidified with all reinforcing components to form the prefabricated plate, the prefabricated plate has good hardness and strength by combining the double-layer reinforcing ribs 3 and the reinforcing steel wire meshes 5, the hardness and the strength at the distribution positions of the circular cavity pipes 4 can be enhanced, and the overall stability of the prefabricated plate is enhanced, avoid because of the distribution of circular cavity pipe 4, lead to the local comparatively fragile condition of appearance of prefabricated plate, strengthen the holistic fastness of prefabricated plate, strengthen the stability in use and increase of service life of prefabricated plate.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. A light-weight high-strength prefabricated slab for buildings comprises a prefabricated slab frame (1), wherein a prefabricated slab filling cavity (101) is formed in the prefabricated slab frame (1), and the prefabricated slab is characterized in that: the prefabricated plate filling cavity is characterized in that the inside top end of the prefabricated plate filling cavity (101) is sequentially provided with a cement plate (2), a reinforcing rib (3), a reinforcing steel wire mesh (5) and a circular cavity pipe (4), wherein the cement plate (2), the reinforcing rib (3) and the reinforcing steel wire mesh (5) are symmetrically distributed at the top end and the bottom end of the circular cavity pipe (4) respectively.
2. The lightweight high-strength precast slab for construction according to claim 1, wherein: the reinforced concrete slab is characterized in that a reinforced core material (21) is added into the cement slab (2), the cement slab (2) is of a cuboid structure, the cross sectional area of the cement slab (2) is equal to the cross sectional area of the interior of the prefabricated slab frame (1), the cement slab (2) is in mixed connection with the reinforced core material (21), and the cement slab (2) is integrally cast and formed.
3. The lightweight high-strength precast slab for construction according to claim 1, wherein: the reinforcing rib (3) include horizontal reinforcing rib (31) and vertical reinforcing rib (32), horizontal reinforcing rib (31) with vertical reinforcing rib (32) are "ten" style of calligraphy crisscross distribution, connecting slot (321) have been seted up on vertical reinforcing rib (32), be equipped with on horizontal reinforcing rib (31) with connecting slot (321) assorted connecting card axle (311).
4. A light-weight high-strength precast slab for construction according to claim 3, wherein: the inner side wall of the prefabricated plate frame (1) is provided with a connecting clamp shaft (311) matched with the connecting clamp groove (321) on the transverse reinforcing rib (31) and the vertical reinforcing rib (32), and the connecting clamp shaft (311) and the connecting clamp groove (321) are of an I-shaped structure.
5. The lightweight high-strength precast slab for construction according to claim 1, wherein: the reinforced steel wire mesh (5) is of a square grid structure, and the reinforced steel wire mesh (5) is made of cold-drawn low-carbon steel.
6. The lightweight high-strength precast slab for construction according to claim 1, wherein: the quantity of circular cavity pipe (4) is a plurality of, a plurality of circular cavity pipe (4) equidistance horizontal distribution is in the inside two of prefabricated plate frame (1) strengthen the intermediate position department of wire net (5).
7. The lightweight high-strength precast slab for construction according to claim 1, wherein: the prefabricated plate frame is characterized in that the prefabricated plate frame (1) is internally provided with two reinforcing ribs (3) which are fixedly arranged on the outer sides of the reinforcing steel wire meshes (5), the cement plate (2) is poured and formed on the outer sides of the reinforcing ribs (3), the prefabricated plate frame (1) is made of light steel, and the reinforcing ribs (3) are made of cold-drawn low-carbon steel.
8. The lightweight high-strength precast slab for construction according to claim 2, wherein: the cement board (2) is made by mixing polymer anti-crack mortar with the reinforced core material (21), and the reinforced core material (21) is a high-strength lightweight aggregate core material.
CN201910849581.9A 2019-09-09 2019-09-09 Light high-strength prefabricated slab for building Pending CN110700480A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112609897A (en) * 2021-01-04 2021-04-06 河南省恒道新材料有限公司 Lightweight concrete plate and manufacturing method thereof

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JPH03162906A (en) * 1989-11-22 1991-07-12 Shigeo Ando Reinforced cement mortar molding and manufacture thereof
JPH09296531A (en) * 1996-05-07 1997-11-18 Suteo Kotani Interior and exterior integrated wall material of light-weight cement
CN1978827A (en) * 2005-11-30 2007-06-13 邱则有 Poured-in-place concrete hollow board
CN203499098U (en) * 2013-08-30 2014-03-26 湖北弘毅钢结构工程有限公司 Compound external wallboard with reinforced concrete external layer
CN204023822U (en) * 2013-12-25 2014-12-17 任培灵 A kind of composite light-weight template
CN204899003U (en) * 2015-08-07 2015-12-23 安徽新华学院 Take hollow light partition wall board of rack
CN205712716U (en) * 2016-04-26 2016-11-23 李藏柱 A kind of assembled architecture hollow precast concrete member
CN107447889A (en) * 2017-07-04 2017-12-08 北京工业大学 A kind of mounting structure for building assembled wall
CN208009743U (en) * 2018-03-21 2018-10-26 天保建设集团有限公司 Light reinforced skeleton air entrained concrete composite partition wall plate
CN208618627U (en) * 2018-04-25 2019-03-19 李藏柱 A kind of precast floor slab and its connection structure
CN109707099A (en) * 2018-12-14 2019-05-03 青建集团股份公司 A kind of quake-proof precast slab for building and its manufacturing method
CN110107016A (en) * 2019-05-31 2019-08-09 西安建工绿色建筑集团有限公司 The Wall building method that pin-connected panel prefabricated panel and dry and wet technique combine

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Publication number Priority date Publication date Assignee Title
WO1988001325A1 (en) * 1986-08-14 1988-02-25 Unan Pty Ltd. Modular building system
JPH03162906A (en) * 1989-11-22 1991-07-12 Shigeo Ando Reinforced cement mortar molding and manufacture thereof
JPH09296531A (en) * 1996-05-07 1997-11-18 Suteo Kotani Interior and exterior integrated wall material of light-weight cement
CN1978827A (en) * 2005-11-30 2007-06-13 邱则有 Poured-in-place concrete hollow board
CN203499098U (en) * 2013-08-30 2014-03-26 湖北弘毅钢结构工程有限公司 Compound external wallboard with reinforced concrete external layer
CN204023822U (en) * 2013-12-25 2014-12-17 任培灵 A kind of composite light-weight template
CN204899003U (en) * 2015-08-07 2015-12-23 安徽新华学院 Take hollow light partition wall board of rack
CN205712716U (en) * 2016-04-26 2016-11-23 李藏柱 A kind of assembled architecture hollow precast concrete member
CN107447889A (en) * 2017-07-04 2017-12-08 北京工业大学 A kind of mounting structure for building assembled wall
CN208009743U (en) * 2018-03-21 2018-10-26 天保建设集团有限公司 Light reinforced skeleton air entrained concrete composite partition wall plate
CN208618627U (en) * 2018-04-25 2019-03-19 李藏柱 A kind of precast floor slab and its connection structure
CN109707099A (en) * 2018-12-14 2019-05-03 青建集团股份公司 A kind of quake-proof precast slab for building and its manufacturing method
CN110107016A (en) * 2019-05-31 2019-08-09 西安建工绿色建筑集团有限公司 The Wall building method that pin-connected panel prefabricated panel and dry and wet technique combine

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112609897A (en) * 2021-01-04 2021-04-06 河南省恒道新材料有限公司 Lightweight concrete plate and manufacturing method thereof

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