CN112012369B - Prefabricated light sandwich wallboard - Google Patents
Prefabricated light sandwich wallboard Download PDFInfo
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- CN112012369B CN112012369B CN202010936708.3A CN202010936708A CN112012369B CN 112012369 B CN112012369 B CN 112012369B CN 202010936708 A CN202010936708 A CN 202010936708A CN 112012369 B CN112012369 B CN 112012369B
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- 239000004567 concrete Substances 0.000 claims abstract description 103
- 238000009413 insulation Methods 0.000 claims abstract description 31
- 239000000463 material Substances 0.000 claims abstract description 14
- 239000010410 layer Substances 0.000 claims description 33
- 239000000835 fiber Substances 0.000 claims description 27
- 239000011159 matrix material Substances 0.000 claims description 18
- 238000009958 sewing Methods 0.000 claims description 8
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 7
- 239000004917 carbon fiber Substances 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 239000010881 fly ash Substances 0.000 claims description 5
- 238000002513 implantation Methods 0.000 claims description 5
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- 229910021487 silica fume Inorganic materials 0.000 claims description 5
- 239000000377 silicon dioxide Substances 0.000 claims description 5
- 230000001154 acute effect Effects 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 claims description 4
- 239000003822 epoxy resin Substances 0.000 claims description 4
- 238000005470 impregnation Methods 0.000 claims description 4
- 229920000647 polyepoxide Polymers 0.000 claims description 4
- 238000009941 weaving Methods 0.000 claims description 4
- 239000011398 Portland cement Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
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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
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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
- 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
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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
- E04B2/74—Removable non-load-bearing partitions; Partitions with a free upper edge
- E04B2/7401—Removable non-load-bearing partitions; Partitions with a free upper edge assembled using panels without a frame or supporting posts, with or without upper or lower edge locating rails
- E04B2/7403—Removable non-load-bearing partitions; Partitions with a free upper edge assembled using panels without a frame or supporting posts, with or without upper or lower edge locating rails with special measures for sound or thermal insulation including fire protection
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
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- Structural Engineering (AREA)
- Acoustics & Sound (AREA)
- Building Environments (AREA)
Abstract
A prefabricated light sandwich wallboard belongs to the technical field of energy-saving materials of house buildings. According to the invention, the inner leaf concrete ribbed plate, the outer leaf concrete ribbed plate and the heat preservation layer are connected into a whole by the cooperation of the plurality of FRP ribs arranged on the outer leaf concrete ribbed plate, the plurality of through holes arranged on the heat preservation layer and the plurality of through holes arranged on the inner leaf concrete ribbed plate with the anchorage devices. The inner leaf concrete ribbed plates and the outer leaf concrete ribbed plates are thin (the thickness of the flat plate is 14mm, and the thickness of the plate ribs is 11mm), so that the quality and the cost of the sandwich wall plate are greatly reduced. Secondly, under the action of the FRP ribs, the heat-insulating layer and the inner and outer leaf concrete ribbed plates carry out load transmission through plate rib contact surfaces, and the integrity is good; the stress concentration problem caused by the traditional connecting piece is also overcome, the occurrence of microcracks is reduced, and the durability is good; meanwhile, the heat insulation device has no cold and heat bridge effect and high heat insulation efficiency.
Description
Technical Field
The invention belongs to the technical field of energy-saving materials for building construction, and particularly relates to a prefabricated light sandwich wallboard.
Background
With the national emphasis on the field of building energy conservation, various prefabricated heat-insulating wall boards are rapidly developed and widely applied to various buildings such as houses and factory buildings. The prefabricated heat-insulation wallboard has the important development trend of light weight, high heat-insulation efficiency, good durability and the like in both fabricated buildings and cast-in-place buildings. At present, common prefabricated heat insulation wallboards are divided into three types of inner heat insulation wallboard, outer heat insulation wallboard and sandwich heat insulation wallboard. The inner heat-insulating wallboard has the problems that the inner heat-insulating layer is easy to damage and is greatly influenced by indoor decoration; the outer heat-insulating wallboard faces the problems of poor fire resistance and poor durability, the service life of the outer heat-insulating wallboard is more than 20 years, so that the building materials cannot be fully utilized, and the waste of resources is caused.
The precast concrete sandwich heat-insulating wall plate is formed by connecting an inner leaf concrete plate, an outer leaf concrete plate and a middle heat-insulating layer through connecting pieces. Compared with an inner heat-insulating wallboard and an outer heat-insulating wallboard, the composite board has excellent durability and fireproof performance. According to the interaction degree of the inner leaf concrete slabs and the outer leaf concrete slabs of the precast concrete sandwich heat-insulation wallboard, the wallboard is divided into a complete combination wall body, a partial combination wall body and a non-combination wall body, the inner leaf concrete slabs and the outer leaf concrete slabs of the partial combination wall body and the non-combination wall body work separately respectively, the external load action is born independently, the integral rigidity is small, the strength of the precast concrete sandwich heat-insulation wallboard is required to be improved by increasing the thickness of the board, and the goal of light weight cannot be realized. The fully combined wallboard forms the inner leaf concrete slab and the outer leaf concrete slab into a whole to resist the load action together through the pulling piece, and the thickness of the concrete slab is reduced to a certain extent. However, due to the existence of the reinforcing mesh in the inner and outer leaf concrete plates, the inner and outer leaf concrete plates must have a certain protective layer thickness to protect the reinforcing bars; in addition, whether rod-shaped, plate-shaped or lattice-shaped FRP connectors are used, the inner and outer leaf concrete panels are required to have sufficient anchoring thicknesses, and these two factors determine that the inner and outer leaf concrete panels must have sufficient thicknesses, so that the quality of the wall panel cannot be further reduced. In addition, the stress concentration phenomenon of the connecting piece is prominent, so that microcracks are easily formed, and the durability of the heat-insulation wallboard is also adversely affected.
Disclosure of Invention
The invention provides a prefabricated light-weight sandwich wallboard for house buildings based on the problems of high wallboard quality, poor durability, incapability of realizing light weight and the like of the existing prefabricated concrete sandwich heat-insulation wallboard.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a prefabricated light sandwich wallboard comprises an outer leaf concrete ribbed plate containing FRP ribs, an inner leaf concrete ribbed plate, a heat insulation layer and an anchorage device;
the outer leaf concrete ribbed plate containing the FRP ribs comprises a first flat plate, wherein a first transverse plate rib with a triangular vertical section is arranged on one side plate of the first flat plate in a matrix form, a first rectangular vertical plate rib is arranged between every two adjacent rows of first transverse plate ribs along the height direction of the first flat plate, and a plurality of FRP ribs are arranged on the first vertical plate rib;
the inner leaf concrete ribbed plate comprises a second flat plate, a side plate of the second flat plate is provided with a second transverse plate rib with a triangular vertical section in a matrix form, a second rectangular vertical plate rib is arranged between every two adjacent rows of second transverse plate ribs along the height direction of the second flat plate, and the second vertical plate rib is provided with a plurality of first through holes along the plate thickness direction;
the heat insulation layer comprises a first structural frame, heat insulation plates and a second structural frame, the first structural frame comprises a third flat plate, a side plate of the third flat plate is provided with a third transverse plate rib with a triangular vertical section in a matrix form, a first through groove matched with the first rectangular vertical plate rib is formed between every two adjacent rows of the third transverse plate ribs, and the other side plate surface of the third flat plate is provided with a plurality of cross-shaped solid protrusions in a matrix form;
the second structural frame comprises a fourth flat plate, a fourth transverse plate rib with a triangular vertical section is arranged on one side plate of the fourth flat plate in a matrix form, a second through groove matched with the rectangular vertical plate rib is arranged between every two adjacent rows of the fourth transverse plate ribs, and a plurality of cross-shaped hollow sleeves are arranged on the other side plate surface of the fourth flat plate in a matrix form; a plurality of through holes II are formed in the flat plate III and the flat plate IV;
the heat insulation plate is provided with a cross-shaped through groove, the other side plate surfaces of the third flat plate and the fourth flat plate are oppositely arranged, the heat insulation plate is arranged between the other side plate surfaces of the third flat plate and the fourth flat plate, and the plurality of cross-shaped solid bulges and the plurality of cross-shaped hollow sleeves are in one-to-one correspondence and are inserted and embedded into a whole;
and the plurality of FRP ribs arranged on the outer leaf concrete ribbed plate penetrate through the plurality of second through holes arranged on the heat-insulating layer and the plurality of through holes arranged on the inner leaf concrete ribbed plate and are matched with the anchorage device to connect the inner leaf concrete ribbed plate, the outer leaf concrete ribbed plate and the heat-insulating layer into a whole.
Compared with the prior art, the invention has the beneficial effects that:
the invention solves the problems that the thickness of the plate cannot be reduced because the prior sandwich wallboard needs enough anchoring thickness due to the use of the connecting piece, the stress concentration is generated to generate micro cracks due to the small stress area of the connecting piece, and the quality of the sandwich wallboard cannot be reduced because the inner leaf concrete ribbed plate and the outer leaf concrete ribbed plate need enough thickness of the protective layer due to the use of the reinforcing mesh. The inner leaf concrete ribbed plates and the outer leaf concrete ribbed plates are thin (the thickness of the flat plate is 14mm, and the thickness of the plate ribs is 11mm), so that the quality and the cost of the sandwich wall plate are greatly reduced. Secondly, under the action of the FRP ribs, the heat-insulating layer and the inner and outer leaf concrete ribbed plates carry out load transmission through plate rib contact surfaces, and the integrity is good; the stress concentration problem caused by the traditional connecting piece is also overcome, the occurrence of microcracks is reduced, and the durability is good; meanwhile, the heat insulation device has no cold and heat bridge effect and high heat insulation efficiency.
The impregnated fiber woven mesh replaces a reinforcing mesh, the corrosion resistance is strong, the corrosion problem of the traditional wallboard caused by the implantation of the reinforcing mesh is not needed to be considered, so that the thickness of the protective layer of the inner leaf concrete ribbed plate and the outer leaf concrete ribbed plate can be very small, and the bearing capacity of the plate can be greatly improved due to the design of the plate ribs and the use of prestress, so that the thickness of the plate is reduced, and the quality of the plate is reduced; secondly, the inner and outer leaf concrete ribbed plates and the heat-insulating layer transmit load through mechanical occlusion between the plate ribs, so that conversion from point load to surface load is realized, the defect that the plate thickness cannot be reduced due to the fact that a connecting piece must have certain anchoring thickness in the traditional sandwich wallboard is overcome, and the problem that micro cracks are generated due to stress concentration of the connecting piece, and further the durability is reduced is solved; in addition, the cost is reduced to a certain extent due to the smaller plate thickness and the existence of the plate ribs, and the plate can be better accepted by the market.
The material selection, the proportion and the manufacturing process of the inner leaf concrete ribbed slab and the outer leaf concrete ribbed slab are determined on the basis of a large number of tests. The inner and outer leaf concrete ribbed plates adopt a prestress mode, the polymer material adopts high-performance concrete, the fiber woven mesh replaces a reinforcing mesh, and the inner sides of the inner and outer leaf concrete ribbed plates are ribbed. The four measures greatly enhance the bearing capacity and the corrosion resistance of the inner and outer leaf concrete ribbed slabs, thereby greatly reducing the thickness of the slabs.
Drawings
FIG. 1 is a schematic cross-sectional view of a prefabricated lightweight sandwich wall panel;
FIG. 2 is a perspective view of a prefabricated light sandwich wall panel;
FIG. 3 is a perspective view of an outer leaf concrete ribbed slab;
FIG. 4 is a perspective view of an inner leaf concrete ribbed slab;
FIG. 5 is a perspective view of the insulating layer;
FIG. 6 is a schematic view of the relative positions of the first structural frame and the second structural frame;
FIG. 7 is a schematic view of a first structural frame;
FIG. 8 is a second structural frame diagram;
FIG. 9 is an enlarged view of the tip of the plate rib;
FIG. 10 is a grooving diagram of the insulation board;
FIG. 11 is a top view of the FRP rib embedded fiber mesh grid;
fig. 12 is a schematic view of FRP ribs implanted with fiber woven mesh.
Detailed Description
The technical solution of the present invention is further described below with reference to the accompanying drawings, but not limited thereto, and any modification or equivalent replacement of the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention shall be covered by the protection scope of the present invention.
In the invention, because the quality of the sandwich wallboard is mainly concentrated on the ribbed plates of the inner leaf concrete and the outer leaf concrete, the invention utilizes the prestressed fiber woven mesh to enhance the high-performance concrete, thereby greatly reducing the thickness of the ribbed plates of the inner leaf concrete and the outer leaf concrete, and further greatly reducing the quality of the sandwich wallboard; the structural framework of the heat-insulating layer is made of FRP, the heat-insulating plate is fixed in the framework to form a whole, the plate ribs on the outer side of the structural framework are matched with the plate ribs of the inner-leaf concrete ribbed plates and the outer-leaf concrete ribbed plates, and under the action of the FRP ribs and the anchorage devices, the three components transmit load through mechanical occlusion between the plate ribs, so that the conversion from point stress to surface stress of a traditional connection mode is realized, and a series of adverse effects caused by stress concentration of the existing sandwich wallboard are overcome. The invention fully utilizes the properties of various materials, optimizes the force transmission mode, forms the sandwich wallboard with light weight, no influence of cold and hot bridges, is convenient to assemble and disassemble, has excellent heat preservation efficiency, structural performance, durability, fireproof performance and economic benefit, and has good engineering application prospect.
The first embodiment is as follows: the embodiment describes a prefabricated light sandwich wallboard, which comprises an outer leaf concrete ribbed plate 2 containing FRP ribs 1, an inner leaf concrete ribbed plate 3, a heat insulation layer 4 and an anchorage device 5;
the outer leaf concrete ribbed plate 2 containing the FRP ribs 1 comprises a first flat plate 6, a first transverse plate rib 8 with a triangular vertical section is arranged on one side plate of the first flat plate 6 in a matrix form, a first rectangular vertical plate rib 7 is arranged between every two adjacent rows of the first transverse plate ribs 8 along the height direction of the first flat plate 6, and a plurality of FRP ribs 1 are arranged on the first vertical plate rib 7;
the inner leaf concrete ribbed plate 3 comprises a second flat plate 9, a lateral plate of the second flat plate 9 is provided with a second transverse plate rib 11 with a triangular vertical section in a matrix form, a second rectangular vertical plate rib 10 is arranged between every two adjacent rows of second transverse plate ribs 11 along the height direction of the second flat plate 9, and the second vertical plate rib 10 is provided with a plurality of first through holes 12 along the plate thickness direction;
the heat insulation layer 4 comprises a first structural frame, heat insulation plates 13 and a second structural frame, the first structural frame comprises a third flat plate 14, a lateral plate rib III with a triangular vertical section is arranged on one lateral plate face of the third flat plate 14 in a matrix form, a first through groove matched with the rectangular vertical plate rib I7 is arranged between every two adjacent columns of the lateral plate ribs III, and a plurality of cross-shaped solid protrusions 15 are arranged on the other lateral plate face of the third flat plate 14 in a matrix form;
the second structural frame comprises a flat plate four 16, a side plate surface of the flat plate four 16 is provided with a transverse plate rib four with a triangular vertical section in a matrix form, a through groove two matched with the rectangular vertical plate rib two 10 is arranged between every two adjacent rows of transverse plate ribs four, and the other side plate surface of the flat plate four 16 is provided with a plurality of cross-shaped hollow sleeves 17 in a matrix form; the third flat plate 14 and the fourth flat plate 16 are provided with a plurality of second through holes 19;
the heat insulation plate 13 is provided with a cross-shaped through groove 18, the other side plate surfaces of the third flat plate 14 and the fourth flat plate 16 are oppositely arranged, the heat insulation plate 13 is arranged between the other side plate surfaces of the third flat plate 14 and the fourth flat plate 16, and the plurality of cross-shaped solid protrusions 15 and the plurality of cross-shaped hollow sleeves 17 are in one-to-one correspondence and are inserted and embedded into a whole;
the FRP ribs 1 arranged on the outer leaf concrete ribbed plate 2 penetrate through the through holes 19 arranged on the heat preservation layer 4 and the through holes 12 arranged on the inner leaf concrete ribbed plate 3 and are matched with the anchorage device 5 to connect the inner leaf concrete ribbed plate 3, the outer leaf concrete ribbed plate 2 and the heat preservation layer 4 into a whole.
The cross solid bulge 15 and the cross hollow sleeve 17 are inserted and nested into a whole, so that a plane perpendicular to the thickness direction of the plate is guaranteed to have enough constraint force. Under the effect of FRP muscle 1 and ground tackle 5, each board rib in close contact with forms wholly through the mechanical interlock between the board rib, carries out the transmission of force through the contact surface of board rib between the three, has guaranteed the restraint that is on a parallel with the board thickness direction simultaneously to form three direction space restraint, consolidate as an organic whole. The through hole is an anchoring channel of the FRP rib 1, the FRP rib 1 penetrates through the through hole and is matched with an anchorage device 5 to combine the inner leaf concrete ribbed plate 3, the outer leaf concrete ribbed plate 2 and the heat insulation layer 4 into a whole. The principle of the design is that the concrete has stronger fire resistance, and the FRP ribs 1 are implanted into the outer leaf concrete ribbed plate 2 to protect the FRP ribs 1 from being eroded by fire to a certain degree, so that the structural safety of the sandwich wall plate is protected. This wallboard has detachable characteristics, and can not destroy major structure and heat preservation 4. After the anchoring is finished, the FRP ribs 1 and the anchorage devices 5 on the outer sides of the inner leaf concrete ribbed plates 3 are coated with fireproof paint. The principle is as follows: in order to connect the inner leaf concrete ribbed slab 3, the outer leaf concrete ribbed slab 2 and the heat preservation layer 4 into a whole, at least one wall plate opening is needed to be used for anchoring treatment, the outer leaf concrete ribbed slab 2 is in contact with the external complex environment and is greatly influenced by the environment, the FRP rib 1 is implanted into the concrete to effectively prevent the erosion of fire, the inner leaf concrete ribbed slab 3 is slightly influenced by the environment, and compared with the method of brushing fireproof paint on the surface of the outer leaf concrete ribbed slab 2, the fireproof paint is brushed on the surface of the inner leaf concrete ribbed slab 3, the service time is longer, and the fireproof cost is further reduced. The FRP ribs are adopted because the FRP has low heat conductivity coefficient and good corrosion resistance. The thermal conductivity coefficient is low, and the cold and hot bridge effect of the sandwich wallboard can be effectively reduced; good corrosion resistance, higher safety performance and service life.
The second embodiment is as follows: in a specific embodiment of the prefabricated lightweight sandwich wall panel, the first structural frame and the second structural frame are both made by pultrusion.
The third concrete implementation mode: in the prefabricated light sandwich wallboard of the first or second embodiment, the first structural frame and the second structural frame are both made of FRP materials, and FRP has the advantages of light weight, low thermal conductivity, corrosion resistance and the like, has no cold and hot bridge effect, and has a promoting effect on improving the heat preservation efficiency.
The fourth concrete implementation mode: in the prefabricated light sandwich wallboard in the first embodiment, the distance between every two adjacent rectangular vertical plate ribs 10 is 1 m. The cross section of the vertical plate rib is set to be rectangular, so that the horizontal slippage of the inner and outer leaf concrete ribbed plates 2 and the heat preservation layer 4 can be controlled, and the strength and rigidity of the inner and outer leaf concrete ribbed plates 2 are enhanced.
The fifth concrete implementation mode: according to the prefabricated light sandwich wallboard in the first specific embodiment, all triangles are right-angled triangles, the acute angle of all the right-angled triangles close to the flat plate is 38 degrees, the acute angle far away from the flat plate is arc-shaped, and the prefabricated light sandwich wallboard can be realized by pouring a template or polishing in the later period, so that stress concentration is eliminated. And the orientation of the triangular plate ribs is determined according to the stress form between the sandwich wall plate and the main structure. For example, the inner and outer leaf concrete ribbed slabs 2 are anchored on the main structure at the same time, the minimum angle of the plate ribs of the inner and outer leaf concrete ribbed slabs 2 is positioned at the upper side, and the plate ribs of the heat-insulating layer 4 are matched with the plate ribs; if only the inner leaf concrete ribbed slab 3 is anchored on the main structure, the minimum angle of the inner leaf concrete ribbed slab 3 is positioned at the upper side, the minimum angle of the outer leaf concrete ribbed slab 2 is positioned at the lower side, and the plate ribs of the heat-insulating layer 4 are matched with the minimum angle.
The sixth specific implementation mode: in a prefabricated light sandwich wallboard according to a first embodiment of the present invention, the inner leaf concrete ribbed slab 3 is prepared by the following steps: the method comprises the steps of weaving two layers of fiber woven nets by using carbon fibers, sewing the ribbed fiber woven nets on the two layers of fiber woven nets by adopting a sewing technology, installing a prestressing device, applying prestressing force, then carrying out epoxy resin impregnation treatment, pouring concrete after curing for 2 hours at normal temperature, curing for 21 days, removing the prestressing device, curing again for 7 days, and removing a formwork, so that the reinforced carbon fiber woven net can be put into use.
The seventh embodiment: in a specific embodiment of the prefabricated lightweight sandwich wallboard, the preparation process of the outer leaf concrete ribbed slab 2 is as follows: the method comprises the steps of weaving two layers of fiber woven meshes by using carbon fibers, adopting a sewing technology, carrying out ribbed fiber mesh sewing and FRP rib implantation on the two layers of fiber meshes to form a fiber mesh framework of a ribbed wallboard, wherein a plurality of fiber bundles 20 are arranged at an FRP rib implantation end and are respectively sewn and woven with the fiber woven meshes around into a whole, installing a prestressing device, carrying out epoxy resin impregnation treatment after prestressing force is applied, pouring concrete after curing for 2 hours at normal temperature, maintaining for 21 days, removing the prestressing device, maintaining for 7 days, and removing a mold, thus being capable of being put into use. The inner and outer leaf concrete ribbed slabs are made of high-performance concrete and fiber woven meshes, so that the thickness of the slabs can be reduced, the high-performance concrete and the fiber woven meshes have strong corrosion resistance, the durability can be improved, and the service life is prolonged.
The specific implementation mode is eight: in the prefabricated light sandwich wall panel according to the sixth or seventh embodiment, the two layers of fiber mesh grid are respectively positioned at the top and the bottom of the inner and outer concrete ribbed slabs 2 on the premise of sufficient thickness of the protective layer. The principle is as follows: due to the fact that wind load is not directional, thrust or suction force can be generated on the sandwich wallboard, the sandwich wallboard tends to bend inwards or outwards, prestress is applied to two sides of the concrete slab, the bending tendency can be resisted by means of high tensile strength of the fiber woven net, and therefore bearing capacity of the slab is improved.
The specific implementation method nine: the concrete is prepared by mixing and stirring portland cement, fly ash, silica fume, nano-silica, quartz sand, chopped carbon fiber and a high-efficiency water reducing agent, wherein the mass mixing amount of the silica fume accounts for 5% -8% of the cementing material, the mass mixing amount of the fly ash accounts for 25% -35% of the cementing material, and the mass mixing amount of the nano-silica accounts for 0.5% -1.5% of the cementing material. These ranges are determined as a result of a combination of considerations of concrete strength, volume shrinkage and overall cost. The mass mixing amount is the specific gravity of the cementing material, and the cementing material is portland cement, fly ash, silica fume and nano-silica.
Claims (7)
1. The utility model provides a prefabricated light core wallboard that presss from both sides which characterized in that: the wallboard comprises an outer leaf concrete ribbed plate (2) containing FRP ribs (1), an inner leaf concrete ribbed plate (3), a heat insulation layer (4) and an anchorage device (5);
the outer leaf concrete ribbed plate (2) containing the FRP ribs (1) comprises a first flat plate (6), one side plate of the first flat plate (6) is provided with a first transverse plate rib (8) with a triangular vertical section in a matrix form, a first rectangular vertical plate rib (7) is arranged between every two adjacent rows of first transverse plate ribs (8) along the height direction of the first flat plate (6), and a plurality of FRP ribs (1) are arranged on the first vertical plate rib (7);
the inner leaf concrete ribbed plate (3) comprises a second flat plate (9), a second transverse plate rib (11) with a triangular vertical section is arranged on one side plate of the second flat plate (9) in a matrix form, a second rectangular vertical plate rib (10) is arranged between every two adjacent rows of second transverse plate ribs (11) along the height direction of the second flat plate (9), and a plurality of first through holes (12) are formed in the second vertical plate rib (10) along the plate thickness direction;
the heat insulation layer (4) comprises a first structural frame, heat insulation boards (13) and a second structural frame, the first structural frame comprises a third flat plate (14), one side plate of the third flat plate (14) is provided with a third transverse plate rib with a triangular vertical section in a matrix form, a first through groove matched with the first rectangular vertical plate rib (7) is formed between every two adjacent rows of the third transverse plate ribs, and the other side plate of the third flat plate (14) is provided with a plurality of cross-shaped solid protrusions (15) in a matrix form;
the second structural frame comprises a flat plate four (16), a lateral plate rib four with a triangular vertical section is arranged on one lateral plate face of the flat plate four (16) in a matrix form, a through groove two matched with the rectangular vertical plate rib two (10) is arranged between every two adjacent rows of the lateral plate ribs four, and a plurality of cross-shaped hollow sleeves (17) are arranged on the other lateral plate face of the flat plate four (16) in a matrix form; a plurality of second through holes (19) are formed in the third flat plate (14) and the fourth flat plate (16);
the heat insulation plate (13) is provided with a cross-shaped through groove (18), the other side plate surfaces of the third flat plate (14) and the fourth flat plate (16) are oppositely arranged, the heat insulation plate (13) is arranged between the other side plate surfaces of the third flat plate (14) and the fourth flat plate (16), and the plurality of cross-shaped solid protrusions (15) and the plurality of cross-shaped hollow sleeves (17) are in one-to-one correspondence and are inserted and embedded into a whole;
the plurality of FRP ribs (1) arranged on the outer leaf concrete ribbed plate (2) penetrate through the plurality of through holes II (19) arranged on the heat-insulating layer (4) and the plurality of through holes I (12) arranged on the inner leaf concrete ribbed plate (3) and are matched with the anchorage device (5) to connect the inner leaf concrete ribbed plate (3), the outer leaf concrete ribbed plate (2) and the heat-insulating layer (4) into a whole;
the preparation process of the inner leaf concrete ribbed slab (3) is as follows: weaving two layers of fiber woven nets by using carbon fibers, sewing the two layers of fiber woven nets by adopting a sewing technology, then installing a prestressing device, applying prestressing force, then carrying out epoxy resin impregnation treatment, pouring concrete after curing for 2 hours at normal temperature, curing for 21 days, removing the prestressing device, curing for 7 days, and removing a formwork, thus being put into use;
the preparation process of the outer leaf concrete ribbed slab (2) is as follows: the method comprises the steps of weaving two layers of fiber woven meshes by using carbon fibers, adopting a sewing technology, carrying out ribbed fiber mesh sewing and FRP rib implantation on the two layers of fiber meshes to form a fiber mesh framework of a ribbed wallboard, wherein a plurality of fiber bundles (20) are arranged at an FRP rib implantation end and are respectively sewn and woven with the fiber woven meshes around into a whole, installing a prestressing device, carrying out epoxy resin impregnation treatment after prestressing, pouring concrete after curing for 2 hours at normal temperature, maintaining for 21 days, removing the prestressing device, maintaining for 7 days, and removing a mold, thus being capable of being put into use.
2. The prefabricated lightweight sandwich wallboard of claim 1, wherein: the first structural frame and the second structural frame are both manufactured by adopting a pultrusion process.
3. The prefabricated lightweight sandwich wall panel of claim 1 or 2, wherein: the first structural frame and the second structural frame are both made of FRP materials.
4. The prefabricated lightweight sandwich wallboard of claim 1, wherein: the distance between every two adjacent rectangular vertical plate ribs II (10) is 1 m.
5. The prefabricated lightweight sandwich wallboard of claim 1, wherein: all the triangles are right-angled triangles, the acute angle of all the right-angled triangles close to the flat plate is 38 degrees, and the acute angle far away from the flat plate is arc-shaped.
6. The prefabricated lightweight sandwich wallboard of claim 1, wherein: the two layers of fiber woven meshes are respectively positioned at the top and the bottom of the outer leaf concrete ribbed slab (2) on the premise of enough protective layer thickness.
7. The prefabricated lightweight sandwich wallboard of claim 1, wherein: the concrete is prepared by mixing and stirring Portland cement, fly ash, silica fume, nano-silica, quartz sand, chopped carbon fibers and a high-efficiency water reducing agent, wherein the mass mixing amount of the silica fume accounts for 5-8% of the cementing material, the mass mixing amount of the fly ash accounts for 25-35% of the cementing material, and the mass mixing amount of the nano-silica accounts for 0.5-1.5% of the cementing material.
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