CN112031203B - Prefabricated sandwich wallboard made of loose heat-insulating materials and manufacturing process of prefabricated sandwich wallboard - Google Patents
Prefabricated sandwich wallboard made of loose heat-insulating materials and manufacturing process of prefabricated sandwich wallboard Download PDFInfo
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- 238000009413 insulation Methods 0.000 claims abstract description 24
- 239000004574 high-performance concrete Substances 0.000 claims abstract description 21
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/14—Producing shaped prefabricated articles from the material by simple casting, the material being neither forcibly fed nor positively compacted
- B28B1/16—Producing shaped prefabricated articles from the material by simple casting, the material being neither forcibly fed nor positively compacted for producing layered articles
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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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- Civil Engineering (AREA)
- Structural Engineering (AREA)
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Abstract
A prefabricated sandwich wallboard made of loose heat-insulating materials and a manufacturing process thereof belong to the technical field of energy-saving materials for building construction. Aiming at the problems of poor heat insulation effect, poor fire resistance and the like of the sandwich wallboard, the invention changes the internal structure and the manufacturing process, optimizes the stress mode of the sandwich wallboard, and has the advantages of light weight, good integrity, high heat insulation efficiency, strong fire resistance, good durability and good economic benefit. Splicing a foam flat plate and a foam web plate on one side into a whole, filling loose heat-insulating materials into a cavity formed by the foam web plate, splicing the foam flat plate on the other side, coating FRP materials on the outer surfaces of the foam flat plate and the foam web plate, curing an FRP shell, laying fiber woven meshes on the surfaces of two sides of a heat-insulating layer and reserving a pore passage for accommodating a cross web plate, connecting the foam web plate and the fiber woven meshes in the two foam flat plates into a whole through a sewing technology, impregnating epoxy resin, pouring high-performance concrete, and maintaining for 14 days and removing a mold.
Description
Technical Field
The invention belongs to the technical field of energy-saving materials for building construction, and particularly relates to a prefabricated sandwich wallboard made of loose heat-insulating materials and a manufacturing process thereof.
Background
With the national emphasis on energy conservation and emission reduction, various industries have developed a series of innovations. In the building energy-saving field, various prefabricated heat-insulating wall boards are rapidly developed and widely applied to various buildings. Whether the prefabricated building or the cast-in-place building is adopted, the heat-insulation wallboard has the advantages of light weight, high heat-insulation efficiency, good integrity and strong fire resistance, and becomes an important development trend.
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 fire resistance and poor durability; compared with the inner heat insulation wallboard and the outer heat insulation wallboard, the sandwich heat insulation wallboard has excellent durability and fireproof performance.
The existing sandwich heat-insulating wall board is mostly formed by connecting an inner leaf concrete board, an outer leaf concrete board and a heat-insulating layer through tie pieces. According to the interaction degree of the inner leaf concrete slabs and the outer leaf concrete slabs, the combined wall is divided into a fully combined wall, a partially combined wall and a non-combined wall, and compared with the partially combined wall and the non-combined wall, the fully combined wall is widely welcomed due to the excellent integrity. However, most of the existing sandwich thermal insulation wallboards utilize thermal insulation boards, and loose thermal insulation materials are rarely directly utilized. Because many insulation boards are formed by multiple processing of loose insulation materials, compared with the method of directly utilizing the loose insulation materials, the method for processing the insulation boards increases the cost and consumes more energy, which has adverse effects on cost reduction, energy conservation and emission reduction.
The inner and outer leaf concrete slabs in the existing sandwich heat-insulating wall board are mostly restrained by a tie piece. Because the metal drawknot has stronger cold and hot bridge effect and narrower application range, the FRP drawknot is adopted in most projects. However, whether the FRP fasteners are rod-shaped, plate-shaped or lattice-shaped, they are constrained by anchoring them in the inner and outer leaf concrete panels, which requires sufficient anchoring thickness of the inner and outer leaf concrete panels; secondly, most of the inner and outer leaf concrete slabs are embedded with reinforcing meshes to enhance the performance of the concrete slabs, and in order to protect the reinforcing meshes and prevent corrosion, a certain protective layer thickness is required on both sides of the reinforcing meshes. These two factors determine that the inner and outer leaf concrete panels cannot reduce the thickness of the panel using this connection, and therefore cannot substantially reduce the quality of the sandwich panel.
In addition, the integrity of the sandwich wallboard cannot be substantially improved by adopting the FRP connecting piece, when the inner leaf concrete slab and the outer leaf concrete slab have relative displacement tendency, the anchoring end of the FRP connecting piece can generate stress concentration phenomenon, and further generate micro cracks, and the existence of the micro cracks can not only reduce the durability, but also can cause the integrity of the sandwich wallboard to be reduced. Secondly, if a fire disaster or a high temperature occurs, the FRP connecting piece is easy to soften and deform due to poor heat resistance, and further damages are caused to the sandwich wall panel.
Disclosure of Invention
Aiming at the problems of poor heat insulation effect, poor fire resistance, poor integrity and the like of the existing sandwich wallboard, the invention provides the prefabricated sandwich wallboard made of the loose heat insulation material and the manufacturing process thereof.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a prefabricated sandwich wallboard using loose heat-insulating materials comprises an inner leaf concrete slab, an outer leaf concrete slab, a cross-shaped web plate and a heat-insulating layer;
the opposite surfaces of one sides of the inner leaf concrete plate and the outer leaf concrete plate are respectively provided with a first groove which is intersected in a longitudinal and transverse mode, the area surrounded by the first grooves comprises a plurality of array units, each array unit comprises a cross-shaped plane, and the area except the cross-shaped plane in each array unit is provided with a plurality of blind holes in an array mode;
the cross-shaped web plate consists of four rectangular plates which are crossed, the crossed part of every two adjacent rectangular plates is provided with a chamfer, and the middle part of the outer side surface of each rectangular plate is provided with an inwards concave arc surface;
the heat insulation layer comprises loose heat insulation materials, an FRP shell, a foam web and two foam flat plates, wherein a first rib which is intersected vertically and horizontally is arranged on the plate surface on one side of each of the two foam flat plates, and a second rib which is the same as the peripheral shape of the cross-shaped section of the cross-shaped web is also arranged in the area surrounded by the first ribs which are intersected vertically and horizontally; two side plate surfaces of the foam web plate are respectively provided with a groove II corresponding to a rib I and a rib II of the foam flat plate, and the foam web plate and the two foam flat plates are spliced into a whole with the groove II through the rib I and the rib II;
a cavity for containing loose heat-insulating materials is formed between the foam web and the two foam flat plates, a pore channel for containing the cross-shaped web is reserved in the thickness direction of the heat-insulating layer, the FRP shell is wrapped on the outer surfaces of the foam web and the two foam flat plates, and ribs matched with grooves of the inner leaf concrete plate and the outer leaf concrete plate and rib points matched with blind holes of the inner leaf concrete plate and the outer leaf concrete plate are arranged on the outer surface of the FRP shell.
A manufacturing process of the prefabricated sandwich wallboard using the loose heat-insulation material comprises the following steps:
the method comprises the following steps: manufacturing a heat insulation layer: preparing a foam flat plate and a foam web plate by using a mould, splicing the foam flat plate and the foam web plate on one side into a whole, filling a loose heat-insulating material into a cavity formed by the foam web plate, splicing the foam flat plate on the other side, coating an FRP (fiber reinforced plastic) material on the outer surfaces of the foam flat plate and the foam web plate by adopting a vacuum forming process, and finishing the manufacturing of a heat-insulating layer after the FRP shell is cured for 24 hours;
step two: laying the fiber woven mesh on the surfaces of the two sides of the heat-insulating layer and reserving a hole for accommodating the cross-shaped web, connecting the foam web and the fiber woven mesh in the two foam flat plates into a whole through a sewing technology, impregnating epoxy resin on the fiber woven mesh, then putting the heat-insulating layer covered with the fiber woven mesh into a sandwich wall plate mould for fixing, pouring high-performance concrete, maintaining for 14 days, and removing the mould.
Compared with the prior art, the invention has the beneficial effects that: the heat-insulating layer can realize the direct utilization of loose heat-insulating materials, and does not need secondary processing to form a heat-insulating plate, thereby having important significance for saving energy and reducing cost; the heat-insulating layer is placed into a sandwich wallboard mould for fixing, the outer surface of the heat-insulating layer is used as an inner template of the inner leaf concrete plate, the outer leaf concrete plate and the cross-shaped web plate, high-performance concrete is poured into the mould, and the inner leaf concrete plate, the outer leaf concrete plate and the cross-shaped web plate are integrally poured, so that the sandwich wallboard has excellent integrity. The operation process is simple, and the problem that the anchoring of the FRP connecting piece needs to be considered when the concrete is poured in the existing sandwich wallboard is solved; the configuration of the cross web appearance and the cross web internal fiber woven mesh is designed according to the stress characteristics, so that the using amount of high-performance concrete is reduced on the premise of ensuring the strength, the occupied volume of the heat-insulating layer is increased, and the heat-insulating efficiency is improved. In addition, the reinforcing material in the cross-shaped web is a fiber woven mesh, so that the mode of reinforcing steel bars adopted in the traditional wallboard is broken through, and the cold-hot bridge effect is reduced; the ribs and rib points are arranged on the outer surface of the heat-insulating layer, so that the mechanical occlusion between the heat-insulating layer and the inner leaf concrete plate and the outer leaf concrete plate and the cross-shaped web plate is enhanced while the strength and the rigidity of the heat-insulating layer are enhanced, the force transmission path among all parts of the sandwich wall plate is optimized, and the integrity is also enhanced; in addition, the combination of high-performance concrete and fiber woven meshes, the bonding between the high-performance concrete and the heat-insulating layer rib points and the ribs and the combination mode of integrally pouring the high-performance concrete and the cross-shaped web plates to replace connecting pieces are adopted, so that the thicknesses of the inner leaf concrete plate and the outer leaf concrete plate are reduced to different degrees, and the quality and the cost of the sandwich plate are reduced to a greater degree. Secondly, because the inner leaf concrete slab, the outer leaf concrete slab and the cross-shaped web all adopt high-performance concrete, utilize the cross-shaped web to replace the FRP connecting piece, overcome the present sandwich wallboard that adopts the FRP connecting piece and soften the defect of deformation when meeting high temperature or conflagration, have stronger high temperature resistance and fire resistance ability.
Drawings
FIG. 1 is a perspective view of a sandwich wall panel;
FIG. 2 is a schematic view of inner and outer leaf concrete panels;
FIG. 3 is a perspective view of a cross web;
FIG. 4 is an enlarged view of a foam plank rib;
FIG. 5 is an enlarged view of a foam web groove;
FIG. 6 is a schematic view of the cavity formed by the foam web;
FIG. 7 is a schematic view of the outer surface of the insulation layer.
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.
The invention can directly utilize loose heat-insulating materials, does not need to process the heat-insulating materials into heat-insulating plates for the second time, and has important significance for saving energy and reducing cost. In addition, the cross-shaped web 3 of the sandwich wallboard takes the outer surface of the heat-insulating layer 4 as a template, the template does not need to be manufactured independently, the whole heat-insulating layer 4 can be placed into the rectangular template of the sandwich wallboard, and the inner leaf concrete plate 1, the outer leaf concrete plate 2 and the cross-shaped web 3 can be formed by one-step pouring. In addition, the outer surface of the outermost FRP shell of the insulating layer 4 is provided with ribs 16 and rib points 17, so that the bonding degree of concrete and the insulating layer 4 is enhanced to a certain extent while the strength and rigidity of the sandwich wallboard are enhanced, and the whole sandwich wallboard has excellent integrity. In addition, the combination of high-performance concrete and fiber woven meshes is adopted by the inner leaf concrete plate 1, the outer leaf concrete plate 2 and the cross-shaped web plate 3, wherein the appearance of the cross-shaped web plate 3 and the configuration of the inner fiber woven meshes are designed according to the stress characteristics of the cross-shaped web plate, on the premise of ensuring the strength, the using amount of the high-performance concrete is reduced, the occupied volume of a heat insulation layer is increased, and the heat insulation efficiency is further improved. The invention has simple operation, can fully utilize loose heat-insulating materials, has the characteristics of light weight, good integrity, strong fire resistance, good durability, high heat-insulating efficiency and good economic benefit, and can be widely applied to house buildings.
The foam flat plate 11 and the foam web 10 of the invention mainly play a role of buffering, have good buffering effect on some loose materials with sharp corners or fragile edges, and can protect the outer FRP shell and the inner heat-insulating material from being damaged. The outer FRP shell mainly plays a structural role, and because the foam flat plates 11 and the foam web plates 10 are small in rigidity and low in strength, and the splicing modes of the foam flat plates 11 and the foam web plates 10 on the two sides are not firm, when the FRP is coated on the surfaces of the foam flat plates 11 and the foam web plates 10, the whole structural shell has certain strength and rigidity.
In the invention, in order to ensure that the heat-insulating layer 4 has enough strength and rigidity (particularly in the thickness direction) and provide a pouring template for the cross-shaped web 3 of the sandwich wallboard, a pore channel with the same shape and size as the cross-shaped web 3 is reserved in the thickness direction of the heat-insulating layer 4. In addition, the outer surface of the FRP shell is provided with ribs 16 and rib points 17, wherein the ribs 16 mainly play a role in enhancing the strength and rigidity of the FRP shell, and the rib points 17 mainly play a role in enhancing the bonding with high-performance concrete. Through the bonding of rib 16 and rib point 17 and high performance concrete, the effect (including effort and moment) to cross web 3 has been alleviated, the power transmission mode of double-layered core wallboard inner structure has been optimized, because the bonding of inner leaf concrete slab 1 and outer leaf concrete slab 2 and FRP shell surface rib point, not only can control the relative displacement of heat preservation 4 and inner leaf concrete slab 1 and outer leaf concrete slab 2, more can share sandwich wallboard cross web 3's load to a great extent, especially inner leaf concrete slab 1, outer leaf concrete slab 2 that play the preparation and use produce shear force and moment of torsion because of the relative displacement trend.
The inner leaf concrete slab 1, the outer leaf concrete slab 2 and the cross-shaped web 3 are prepared by adopting fiber woven mesh reinforced high-performance concrete, the defect that the thickness of the existing sandwich wallboard cannot be reduced because the common concrete is adopted and the steel bars are implanted is overcome (because the steel bars need to have enough protection layer thickness to protect the steel bars from being corroded), and the thickness of the board can be greatly reduced. In addition, the impregnated fiber woven mesh has strong corrosion resistance, and is polymerized together by high-performance concrete, so that the durability is further improved.
In the invention, the appearance of the cross-shaped web 3 and the configuration of the internal fiber net are designed according to the stress characteristics of the cross-shaped web 3, and the influence brought by the actions of bending moment, shearing force, axial force, torque and the like of the cross-shaped web 3 is comprehensively considered. According to the design, on the premise of ensuring the strength, the consumption of concrete is reduced, the occupied volume of the heat-insulating layer is increased, and the heat-insulating efficiency is further improved. Through calculation and test, the acting force for the control action is the shearing force and the torque generated by the relative displacement trend of the inner blade concrete plate 1 and the outer blade concrete plate 2. And the outermost FRP shell of the heat-insulating layer 4 greatly relieves the effect of the shear force and the torque on the cross-shaped web 3 due to the bonding of the surface ribs 16 and the rib points 17 with the high-performance concrete, thereby optimizing the stress of the internal structure of the sandwich wallboard.
The first embodiment is as follows: the embodiment describes a prefabricated sandwich wallboard using loose heat-insulating materials, as shown in fig. 1, the sandwich wallboard comprises an inner leaf concrete slab 1, an outer leaf concrete slab 2, a cross-shaped web 3 and a heat-insulating layer 4;
the opposite surfaces of one side of each of the inner leaf concrete plate 1 and the outer leaf concrete plate 2 are provided with a first groove 5 which is intersected in a longitudinal and transverse mode, the area surrounded by the first grooves 5 comprises a plurality of array units, each array unit comprises a cross-shaped plane 6, and the area except the cross-shaped plane in each array unit is provided with a plurality of blind holes 7 in an array mode, as shown in figure 2;
the cross-shaped web 3 is composed of four rectangular plates 8 which are crossed, the crossed part of every two adjacent rectangular plates 8 is provided with a chamfer, and the middle part of the outer side surface of each rectangular plate 8 is provided with an inwards concave arc surface, as shown in fig. 3;
the heat-insulating layer 4 comprises loose heat-insulating materials, an FRP shell, a foam web 10 and two foam flat plates 11, wherein a first rib 12 which is intersected vertically and horizontally is arranged on the plate surface on one side of each of the two foam flat plates 11, and a second rib 13 which is the same as the peripheral shape of the cross-shaped section of the cross-shaped web 3 is also arranged in the area surrounded by the first ribs 12 which are intersected vertically and horizontally, as shown in figure 4; two side plate surfaces of the foam web plate 10 are respectively provided with a second groove 14 corresponding to the first rib 12 and the second rib 13 of the foam flat plate 11, as shown in fig. 5, the foam web plate 10 and the two foam flat plates 11 are spliced into a whole with the second groove 14 through the first rib 12, the second rib 13 and the second groove 14;
a cavity 15 for containing loose heat insulation materials is formed between the foam web 10 and the two foam flat plates 11, as shown in fig. 6, a pore for containing a cross-shaped web 3 is reserved in the thickness direction of the heat insulation layer 4, the FRP shell is coated on the outer surfaces of the foam web 10 and the two foam flat plates 11, and a rib 16 matched with the first groove 5 of the inner leaf concrete plate 1 and the outer leaf concrete plate 2 and a rib point 17 matched with the blind holes 7 of the inner leaf concrete plate 1 and the outer leaf concrete plate 2 are arranged on the outer surface of the FRP shell, as shown in fig. 7.
The second embodiment is as follows: in the prefabricated sandwich wallboard using the loose thermal insulation material, the inner leaf concrete plate 1, the outer leaf concrete plate 2 and the cross-shaped web plate 3 are all made of fiber woven mesh reinforced high-performance concrete, and are integrally cast and formed in one step, so that the prefabricated sandwich wallboard has excellent integrity.
The third concrete implementation mode: a process for manufacturing a prefabricated sandwich wall panel using loose thermal insulation materials according to the first or second embodiment comprises the following steps:
the method comprises the following steps: manufacturing a heat insulation layer: preparing a foam flat plate 11 and a foam web 10 by using a mold, splicing the foam flat plate 11 and the foam web 10 on one side into a whole, filling a loose heat-insulating material into a cavity 15 formed by the foam web 10, splicing the foam flat plate 11 on the other side, coating an FRP (fiber reinforced plastic) material on the outer surfaces of the foam flat plate 11 and the foam web 10 by adopting a vacuum forming process, and finishing the manufacture of the heat-insulating layer 4 after the FRP shell is cured for 24 hours; the FRP material consists of resin and fiber, and FRP is formed after the resin is cured;
step two: lay the fibre woven mesh in the pore that holds cross web 3 with reserving on the both sides surface of heat preservation 4, connect foam web 10 and the fibre woven mesh in two foam flat plates 11 as an organic whole through sewing technique, impregnate epoxy on the fibre woven mesh, then it is fixed to have this heat preservation that covers the fibre woven mesh to put into sandwich wallboard mould, pours high performance concrete, and the maintenance is 14 days, and the form removal can.
The fourth concrete implementation mode: in the second step, the high-performance concrete is formed 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% -40% of the cementing material, and the mass mixing amount of the nano-silica accounts for 0.5% -1.5% of the cementing material. The content of other materials is adjusted according to different environmental conditions and engineering importance levels. 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 (2)
1. The utility model provides a utilize prefabricated core wallboard of pressing from both sides of loose insulation material which characterized in that: the sandwich wallboard comprises an inner leaf concrete slab (1), an outer leaf concrete slab (2), a cross-shaped web plate (3) and a heat-insulating layer (4);
the opposite surfaces of one sides of the inner leaf concrete plate (1) and the outer leaf concrete plate (2) are respectively provided with a first groove (5) which is intersected in a longitudinal and transverse mode, the area surrounded by the first grooves (5) comprises a plurality of array units, each array unit comprises a cross-shaped plane (6), and the area except the cross-shaped plane in each array unit is provided with a plurality of blind holes (7) in an array mode;
the cross-shaped web plate (3) is composed of four rectangular plates (8) which are crossed, a chamfer is arranged at the crossed position of every two adjacent rectangular plates (8), and the middle part of the outer side surface of each rectangular plate (8) is provided with an inwards concave arc surface;
the heat-insulating layer (4) comprises loose heat-insulating materials, an FRP shell, a foam web (10) and two foam flat plates (11), wherein one side plate surface of each of the two foam flat plates (11) is provided with a first rib (12) which is intersected vertically and horizontally, and an area surrounded by the first rib (12) which is intersected vertically and horizontally is also provided with a second rib (13) which is the same as the peripheral shape of the cross-shaped section of the cross-shaped web (3); two side plate surfaces of the foam web plate (10) are respectively provided with a second groove (14) corresponding to a first rib (12) and a second rib (13) of the foam flat plate (11), and the foam web plate (10) and the two foam flat plates (11) are spliced into a whole through the first rib (12), the second rib (13) and the second groove (14);
a cavity (15) for containing loose heat-insulating materials is formed between the foam web (10) and the two foam flat plates (11), a pore for containing a cross-shaped web (3) is reserved in the thickness direction of the heat-insulating layer (4), the FRP shell is coated on the outer surfaces of the foam web (10) and the two foam flat plates (11), and ribs (16) matched with grooves I (5) of the inner leaf concrete plate (1) and the outer leaf concrete plate (2) and rib points (17) matched with blind holes (7) of the inner leaf concrete plate (1) and the outer leaf concrete plate (2) are arranged on the outer surface of the FRP shell; the inner leaf concrete plate (1), the outer leaf concrete plate (2) and the cross-shaped web plate (3) are all made of fiber woven mesh reinforced high-performance concrete through integral pouring and one-step forming;
the manufacturing process of the prefabricated sandwich wallboard using the loose heat-insulating material comprises the following steps:
the method comprises the following steps: manufacturing a heat insulation layer: preparing a foam flat plate (11) and a foam web (10) by using a mold, splicing the foam flat plate (11) and the foam web (10) on one side into a whole, filling a loose heat-insulating material into a cavity (15) formed by the foam web (10), splicing the foam flat plate (11) on the other side, coating an FRP (fiber reinforced plastic) material on the outer surfaces of the foam flat plate (11) and the foam web (10) by adopting a vacuum forming process, and after the FRP shell is cured for 24 hours, finishing the manufacture of the heat-insulating layer (4);
step two: lay the fibre woven mesh in the pore that holds cross web (3) with reserving on the both sides surface of heat preservation (4), connect foam web (10) and the fibre woven mesh in two foam flat boards (11) as an organic whole through sewing technique, impregnate epoxy on the fibre woven mesh, then it is fixed to put into sandwich panel mould with this heat preservation that covers fibre woven mesh, pour high performance concrete, maintenance 14 days, it can to demolish the mould.
2. The prefabricated sandwich wall panel using loose thermal insulation material as claimed in claim 1, wherein: in the second step, the high-performance 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 mass of the cementing material, the mass mixing amount of the fly ash accounts for 25% -40% of the mass of the cementing material, and the mass mixing amount of the nano-silica accounts for 0.5% -1.5% of the mass of the cementing material.
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