CN114607090A - Prefabricated concrete structure wallboard and application thereof - Google Patents

Prefabricated concrete structure wallboard and application thereof Download PDF

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Publication number
CN114607090A
CN114607090A CN202210188124.1A CN202210188124A CN114607090A CN 114607090 A CN114607090 A CN 114607090A CN 202210188124 A CN202210188124 A CN 202210188124A CN 114607090 A CN114607090 A CN 114607090A
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China
Prior art keywords
concrete structure
polymer cement
glass wool
heat
wall panel
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CN202210188124.1A
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Chinese (zh)
Inventor
路国忠
王肇嘉
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Beijing Building Materials Testing Academy Co ltd
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Beijing Building Materials Testing Academy Co ltd
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Priority to CN202210188124.1A priority Critical patent/CN114607090A/en
Publication of CN114607090A publication Critical patent/CN114607090A/en
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/26—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups
    • E04C2/284—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating
    • 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
    • B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
    • B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
    • B28B11/245—Curing concrete articles
    • 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
    • B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
    • B28B13/02—Feeding the unshaped material to moulds or apparatus for producing shaped articles
    • 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
    • B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
    • B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
    • 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
    • E04B1/7608—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 comprising a prefabricated insulating layer, disposed between two other layers or panels
    • 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
    • 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
    • E04B1/92—Protection against other undesired influences or dangers
    • E04B1/94—Protection against other undesired influences or dangers against fire
    • E04B1/941—Building elements specially adapted therefor
    • E04B1/942—Building elements specially adapted therefor slab-shaped
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/30—Building 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
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/44—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the purpose
    • E04C2/46—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the purpose specially adapted for making walls
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F13/00—Coverings or linings, e.g. for walls or ceilings
    • E04F13/07—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor
    • E04F13/08—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements
    • E04F13/16—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements of fibres or chips, e.g. bonded with synthetic resins, or with an outer layer of fibres or chips

Abstract

The present invention relates to a wall masonry material technologyThe technical field, in particular to a prefabricated concrete structure wallboard and application thereof. Prefabricated concrete structure wallboard is including range upon range of setting gradually: inner leaf walls, heat-insulating layers, outer leaf walls and veneers; more than two polymer cement mortar layers are stacked in the outer leaf wall, alkali-resistant glass fiber gridding cloth is arranged between the polymer cement mortar layers, and the polymer cement mortar layers are respectively arranged in contact with the heat insulation layer and the facing; wherein the total thickness of the outer leaf wall is 3-5 mm; the inner leaf wall and the heat-insulating layer are fixed by adopting an anchoring part; the number of the anchoring parts is more than or equal to 8 per meter2(ii) a The anchor has an effective anchoring depth of greater than or equal to 50 mm. The prefabricated concrete structure wallboard can still give consideration to the building safety when the thermal insulation layer is thicker.

Description

Prefabricated concrete structure wallboard and application thereof
Technical Field
The invention relates to the technical field of wall masonry materials, in particular to a prefabricated concrete structure wallboard and application thereof.
Background
The assembly type building is produced by prefabricating the components in a factory and is assembled on site, and the assembly type building has the advantages of material saving, energy saving, environmental protection, safety, high construction speed, high building quality and the like. The types of prefabricated members for fabricated concrete buildings mainly include: the prefabricated wall panel of sandwich insulation concrete, solid slab of outer wall, inner wallboard, coincide floor, balcony, air conditioner board, stair, precast beam and precast column, etc.; the sandwich heat-insulating concrete prefabricated wall panel is a prefabricated component with a sandwich structure, which is formed by arranging heat-insulating layers between an outer leaf wall and an inner leaf wall of a prefabricated concrete external wall panel and connecting the heat-insulating layers together through connecting pieces, and is a main form of an existing assembled concrete building external wall, so that the wall with three functions of energy-saving heat insulation, bearing and enclosure of a building is realized.
Along with the gradual improvement of the requirements of building energy-saving standards, the assembled ultra-low building becomes the mainstream of future building development, the heat-insulating performance of the sandwich heat-insulating concrete prefabricated wall panel for the assembled building is improved, the thickness of the heat-insulating layer is greatly increased and is increased to 250mm-300mm from about 80mm, so that the potential safety hazard of the outer leaf wall is increased, and the connection safety of the traditional sandwich heat-insulating prefabricated wall panel brings huge challenges; because the sandwich heat-insulating concrete prefabricated wall panel is a prefabricated component with a sandwich structure formed by connecting through connecting pieces, the sandwich heat-insulating concrete prefabricated wall panel is generally composed of a reinforced concrete inner leaf wall with the thickness of 200mm, a rear outer leaf wall with the thickness of 60mm and heat-insulating layers with different thicknesses, the connection safety of the inner leaf wall, the outer leaf wall and the heat-insulating layers depends on the connection effect of the connecting pieces, the shearing resistance and bearing capacity of the connecting pieces are related to the thickness of the heat-insulating layers, and the shearing resistance and bearing capacity of the connecting pieces are obviously reduced along with the increase of the thickness of the heat-insulating layers, therefore, the thickness requirement of the heat-insulating layers is less than 120mm, and further considering comprehensive influence factors such as earthquake, dead weight, temperature, environment and the like, at present, the thickness of the heat-insulating layer of the sandwich heat-insulating concrete prefabricated wall panel in actual production and specific engineering application of factories in the industry is controlled to be less than 90 mm. In addition, after the existing assembly type concrete building is installed with the sandwich prefabricated wall panel, the outer side of the wall panel needs to be subjected to the traditional outer wall painting process to perform wet operation of decorative layers such as priming paint brushing, putty scraping and paint brushing, and the purpose of assembly type green building is not achieved.
In summary, how to research and develop a prefabricated concrete structure wallboard which can still take account of building safety when a thicker heat-insulating layer is used, so as to be more beneficial to energy conservation and emission reduction, is a key technical problem which needs to be solved urgently by technical personnel in the field at present.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a prefabricated concrete structure wallboard, which comprises the following components in sequential stacking arrangement: inner leaf walls, heat-insulating layers, outer leaf walls and veneers;
more than two polymer cement mortar layers are stacked in the outer leaf wall, alkali-resistant glass fiber gridding cloth is arranged between the polymer cement mortar layers, and the polymer cement mortar layers are respectively arranged in contact with the heat insulation layer and the facing;
wherein the total thickness of the outer leaf wall is 3-5 mm;
the inner leaf wall and the heat-insulating layer are fixed by adopting an anchoring part; the number of the anchoring parts is more than or equal to 8 per meter2(ii) a The anchor has an effective anchoring depth of greater than or equal to 50 mm.
The prefabricated concrete structure wallboard has a thick heat insulation layer, and meanwhile, the overall connection safety of the prefabricated concrete structure wallboard can be obviously improved. Wherein, when the gross thickness of outer leaf wall was 3 ~ 5mm, just can guarantee the holistic integrality of outer leaf wall, realize the safety joint with the heat preservation. The present invention has found that when the thickness is too thick, the polymer cement mortar layer is easily cracked. The invention further discovers that when the alkali-resistant glass fiber mesh cloth is not contained between the polymer cement mortar layers, the polymer cement mortar layers are easy to crack, and the whole connection safety of the prefabricated concrete structure wall plate can not be realized.
In a preferred embodiment, the polymer cement mortar layer has a single layer thickness of 1mm to 3 mm.
In a preferred embodiment, the heat-insulating layer comprises a glass wool board, and basalt fibers are sewn on the glass wool board;
the basalt fiber sewing mode is as follows: sewing a circle on the maximum area plate surface of the glass wool plate at a distance of 45-55 mm from the side length of the periphery to form a basalt fiber ring; and sewing in the basalt fiber ring according to the interval of 95-105 mm in the warp and weft directions.
More preferably, the basalt fiber is sewn in a manner that: sewing a circle on the maximum area plate surface of the glass wool plate at a distance of 48-52 mm from the side length of the periphery to form a basalt fiber ring; and sewing in the basalt fiber ring according to the distance of 98-102 mm in the warp and weft directions.
Through adopting the above-mentioned cotton board of glass who makes up, can further improve the structural stability of heat preservation, when making it use in the heat preservation that is greater than 90mm thickness, show the anti shearing bearing capacity that improves the connecting piece, and then improve the security of being connected of outer leaf wall and veneer.
As a preferred embodiment, the density of the glass wool board is more than 110kg/m3(ii) a And in the direction vertical to the maximum area plate surface of the glass wool plate, the tensile strength of the glass wool plate is greater than or equal to 200 kPa.
When the density and the tensile strength of the glass wool board are under the conditions, the structural stability of the heat-insulating layer can be further enhanced.
In a preferred embodiment, the glass wool panel has a thermal conductivity of less than or equal to 0.033W/m.K at 25 ℃ and a fire performance class A.
Under the conditions, the glass wool board can give consideration to both better structural stability and excellent fireproof performance, and meets the requirement of heat transfer coefficient in building standards. In addition, a common energy-saving outer window can be adopted, a fire-resistant energy-saving window with the fire-resistant integrity more than 0.5 hour is not required to be adopted, and a fire-proof isolation strip is not required to be additionally arranged, so that the fire-proof requirement of national standard GB50016-2014 'building design fire-proof standard' can be met.
As a preferred embodiment, the surface of the glass wool board is coated with a polymer cement waterproof coating; the hydrophobic rate of the glass wool board is more than 99.5 percent, and the type I polymer cement waterproof coating is more preferable.
The glass wool board treated by the waterproof coating can effectively prevent the performance of the glass wool board from changing due to water absorption in the using process, particularly the change of the structural stability of the glass wool board, and further influences the connection safety of an outer leaf wall and a decorative surface.
As a preferred embodiment, the arrangement of the anchors is in the shape of a plum blossom.
In a preferred embodiment, the anchor member is composed of an expansion member made of stainless steel or surface-treated carbon steel, and an expansion sleeve made of virgin polyamide or polyethylene and having a disc diameter of 120mm to 160 mm.
As a preferred embodiment, when the prefabricated concrete structural wall board is used for ultra-low energy consumption buildings or near zero energy consumption buildings, the anchoring part adopts a heat-insulating bridge anchor bolt.
The anchor adopts the broken heat bridge anchor bolt and can obviously reduce the heat bridge influence that the anchor brought.
The person skilled in the art can further derive other preferred embodiments of the invention by optimally combining the above-mentioned preferred embodiments.
Further, the invention also provides a preparation method of the prefabricated concrete structure wallboard, which comprises the following steps: laying a heat-insulating layer before the initial setting of the prefabricated reinforced concrete inner leaf wall, and then inserting anchoring pieces, wherein the number of the anchoring pieces is 8/m2(ii) a The anchor has an effective anchoring depth of greater than or equal to 50 mm. Then the inner leaf wall with the heat-insulating layer, the mould and the mould table are conveyed to a mortar and grid cloth scraping and laying machine in the next process through a track, a polymer cement mortar layer is scraped and coated on the heat-insulating layer for one time, a layer of alkali-resistant glass fiber grid cloth is laid on the surface of the first polymer cement mortar layer, the polymer cement mortar layer is pressed in by a compression roller, then a second polymer cement mortar layer is scraped and coated, and two polymer cement mortar layers (including one layer of alkali-resistant glass fiber grid cloth) are coatedAlkali glass fiber mesh cloth) with a thickness of 3mm to 5 mm; then the stone is conveyed to the lower side of a flexible stone laying machine in the next procedure through a rail to lay the flexible stone, and a stainless steel roller on the flexible stone is rolled simultaneously to enable the flexible stone decorative layer to be laid, compacted and firmly bonded; and then feeding the wallboard into a pre-curing kiln for pre-curing, wherein the temperature of the curing kiln is 30-50 ℃, the humidity is 60-80%, after pre-curing for 1-3 hours, feeding the integrated wallboard into the curing kiln for curing, the temperature of the curing kiln is 50-70 ℃, the humidity is more than 90%, the curing time is 6-10 hours, and finally, discharging the wallboard out of the kiln and removing the formwork to obtain the prefabricated concrete structure wallboard.
Furthermore, the invention also provides application of the prefabricated concrete structure wall board in improving the safety of the prefabricated concrete structure wall board.
Compared with the prior art, the invention has the beneficial effects that:
1. the prefabricated concrete structure wallboard disclosed by the invention has a thicker heat-insulating layer, and meanwhile, the overall connection safety of the prefabricated concrete structure wallboard can be obviously improved. The glass wool board thin-plastering external thermal insulation system (a structural system except for the inner leaf wall) is adopted to replace an insulation layer, an outer leaf wall and a binding part system in the sandwich insulation concrete prefabricated wall board, and the connection safety of the outer leaf wall of the existing sandwich insulation prefabricated concrete wall board is greatly improved.
2. The heat-insulating plate thin plastering system solves the common quality problems and technical problems of hollowing, cracking, water seepage, falling and the like of a heat-insulating plate thin plastering system which is mainly bonded by bonding and anchoring adopted in the traditional external heat insulation of the external wall.
3. Under the condition that the existing assembly type concrete building structure connecting system is not changed, 60mm of outer leaf wall concrete and reinforcing steel bar materials are saved, the weight of the prefabricated wall board is reduced, and the processing difficulty of the sandwich heat-insulation prefabricated wall board is reduced; the flexible stone decorative surface layer is prefabricated in a factory, so that the construction of the external wall coating on the engineering site is reduced, the integration of heat preservation and decoration of a building structure and the prefabrication of the factory are realized, and the building cost per square meter can be reduced by 20 percent.
4. The modified glass wool board with the combustion performance of A grade is adopted as a heat insulation material, a common energy-saving external window can be adopted, a fire-resistant energy-saving window with the fire-resistant integrity of more than 0.5 hour does not need to be adopted, and a fire-resistant isolation strip does not need to be additionally arranged, so that the fire-resistant requirement of national standard GB50016-2014 'building design fire-resistant Specification' can be met.
Detailed Description
The following describes the embodiments of the present invention in further detail with reference to specific examples.
The following examples are merely illustrative of the present invention and are not intended to limit the scope of the present invention.
The experimental procedures used in the following examples are conventional unless otherwise specified.
Materials, reagents and the like used in the following examples are commercially available unless otherwise specified.
In the following embodiments, the inner leaf wall used is the same as the inner leaf wall material, structure, strength, etc. of the prefabricated sandwich thermal insulation wall panel of the traditional fabricated concrete building.
In the following examples, the glass wool board was a high density hydrophobic glass wool board sewn with basalt fiber and wrapped with a six-sided coating of type i polymer cement waterproof coating. Wherein, the performance index of the glass wool board is shown in table 1. The standard size of the glass wool board is 600mm multiplied by 900mm, the thickness is 50mm-300mm, and the specific thickness is determined according to specific items; basalt fibers are sewn on the glass wool board; the sewing mode of the basalt fiber is as follows: sewing a circle on the maximum area plate surface of the glass wool plate at a distance of 50mm from the side length of the periphery to form a basalt fiber ring; and sewing the basalt fiber ring in the warp and weft directions according to the distance of 100 mm. After sewing, six surfaces of the I-type polymer cement waterproof coating are wrapped, the thickness of the polymer cement waterproof coating is 1.0mm-3.0mm of two large surfaces, and 0.5mm-1.0mm of four small side surfaces, and the performance index of the polymer cement waterproof coating meets the requirement of GBT23445-2009 Polymer cement waterproof coating.
TABLE 1 Performance index of glass wool Panel
Figure BDA0003524439660000061
In the following examples, the anchor consists of an expansion element made of stainless steel or surface-treated carbon steel, and an expansion sleeve made of virgin polyamide or polyethylene with a disc. The anchoring piece is arranged in a plum blossom shape.
In the following examples, the performance index of the polymer cement mortar meets the technical requirement of plastering mortar in JGJ144-2019 technical Standard for external thermal insulation of exterior walls.
In the following embodiment, the flexible stone coiled material veneer is formed by rechecking a high-elasticity water-based polyurethane emulsion, natural colored stone powder, a fiber mixture and a special-performance metal compound through a normal temperature curing technology, is superior to the traditional stone and ceramic tile, has light surface flexibility, does not fall off or crack along with shaping, is rich in color and outstanding in texture, can realize the effects of real stone paint, colorful paint, face brick, stone and the like, and has excellent performances of weather resistance, stain resistance, alkali resistance, color retention, water resistance, air permeability, flexibility, impact resistance and the like. The standard size is 600mm multiplied by 2400mm in width multiplied by length and 5mm to 10mm in thickness; the main performance indexes are as follows: the paint has the advantages of no abnormality after 48h of alkali resistance, no abnormality after 96h of water resistance, no abnormality after 2000 times of scrubbing resistance, no abnormality after 5 times of thermal denaturation resistance, no bubbling, no peeling, no crack, pulverization and discoloration after 1000h of artificial aging resistance, less than 5% of stain resistance, tensile strength of more than 1.0MPa in a standard state, and elongation at break of more than 100%.
Example 1
This embodiment provides a precast concrete structure wallboard, its structure including contact in proper order and set up: the prefabricated reinforced concrete inner leaf wall comprises a prefabricated reinforced concrete inner leaf wall, a glass wool board heat-insulating layer, a polymer cement mortar layer, an alkali-resistant glass fiber gridding cloth, a polymer cement mortar layer, a flexible stone decorative layer (facing) and an expansion anchoring part for connecting and fixing the glass wool board heat-insulating layer on the inner leaf wall. The glass wool board external thermal insulation thin plastering system comprises a glass wool board thermal insulation layer, a polymer cement mortar layer, an alkali-resistant glass fiber mesh cloth, a polymer cement mortar layer and a flexible stone decorative layer (veneer). The prefabricated reinforced concrete inner leaf wall and the glass wool board external thermal insulation thin plastering system are fixed on the outer side of the inner leaf wall through anchoring parts.
Specifically, the thickness of the prefabricated reinforced concrete inner leaf wall is 200 mm; the thickness of the glass wool board heat insulation layer is 100 mm; the thickness of the two polymer cement mortar layers (containing one alkali-resistant glass fiber mesh cloth) is 5 mm; the diameter of the anchoring piece disc is 140mm, and the anchoring depth in the prefabricated reinforced concrete inner leaf wall is 50 mm; the finish coat is the flexible stone material of imitative brick, and thickness is 5 mm.
The embodiment also provides a preparation method of the prefabricated concrete structure wallboard, which specifically comprises the following steps: laying a glass wool board heat-insulating layer before the initial setting of the prefabricated reinforced concrete inner leaf wall, and then inserting anchoring pieces, wherein the number of the anchoring pieces is 8/m2The arrangement mode adopts a quincunx shape; then, conveying the inner leaf wall with the heat-insulating layer, the die and the die table to a mortar and grid cloth scraping and laying machine in the next process through a rail, scraping and coating a polymer cement mortar layer with the thickness of 1-3 mm on the glass wool board heat-insulating layer, paving a layer of alkali-resistant glass fiber grid cloth on the surface of the first polymer cement mortar layer, pressing the alkali-resistant glass fiber grid cloth into the polymer cement mortar layer by using a compression roller, then scraping and coating a second polymer cement mortar layer with the thickness of 1-3 mm, wherein the thickness of the two polymer cement mortar layers (containing the alkali-resistant glass fiber grid cloth) is 3-5 mm; then the stone is conveyed to the lower side of a flexible stone laying machine in the next procedure through a rail to lay the flexible stone, and a stainless steel roller on the flexible stone is rolled simultaneously to enable the flexible stone decorative layer to be laid, compacted and firmly bonded; and then feeding the wallboard into a pre-curing kiln for pre-curing, wherein the temperature of the curing kiln is 30-50 ℃, the humidity is 60-80%, after pre-curing for 1-3 hours, feeding the integrated wallboard into the curing kiln for curing, the temperature of the curing kiln is 50-70 ℃, the humidity is more than 90%, the curing time is 6-10 hours, and finally, discharging the wallboard from the kiln and removing a mold to obtain the prefabricated concrete structure wallboard taking the glass wool board as the heat insulation layer.
The prefabricated concrete structure wallboard prepared in the embodiment has the heat insulation layer with the thickness of 100mm and the heat transfer coefficient of 0.32W/m 2K, meets the requirement that the heat transfer coefficient is less than or equal to 0.35W/m 2K in 80% building energy-saving standard, solves the technical problem that the heat insulation layer of the prefabricated sandwich external wallboard is less than or equal to 90mm in thickness, meets the requirement of 'assembly concrete building technical standard' GB/T51231 plus 2016 in other properties, passes the anti-seismic performance test, and has higher cost performance.
Example 2
This embodiment provides a precast concrete structure wallboard, its structure includes that contact in proper order sets up: the prefabricated reinforced concrete inner leaf wall comprises a prefabricated reinforced concrete inner leaf wall, a glass wool board heat-insulating layer, a polymer cement mortar layer, an alkali-resistant glass fiber gridding cloth, a polymer cement mortar layer, a flexible stone decorative layer (facing) and an expansion anchoring part for connecting and fixing the glass wool board heat-insulating layer on the inner leaf wall. The glass wool board external thermal insulation thin plastering system comprises a glass wool board thermal insulation layer, a polymer cement mortar layer, an alkali-resistant glass fiber mesh cloth, a polymer cement mortar layer and a flexible stone decorative layer (veneer). The prefabricated reinforced concrete inner leaf wall and the glass wool board external thermal insulation thin plastering system are fixed on the outer side of the inner leaf wall through anchoring parts.
Specifically, the thickness of the prefabricated reinforced concrete inner leaf wall is 200 mm; the thickness of the glass wool board heat-insulating layer is 250 mm; the thickness of the two polymer cement mortar layers (containing one alkali-resistant glass fiber gridding cloth) is 5 mm; the anchoring part adopts a heat-insulating bridge anchor bolt, and the performance of the anchor bolt meets the technical requirements of GB/T51350-2019 'near-zero energy consumption building technical standard'. The diameter of the anchoring piece disc is 140mm, and the anchoring depth in the prefabricated reinforced concrete inner leaf wall is 50 mm; the finish coat is the flexible stone material of imitative brick, and thickness is 5 mm.
The embodiment also provides a preparation method of the prefabricated concrete structure wallboard, which specifically comprises the following steps: laying a glass wool board heat-insulating layer before the initial setting of the prefabricated reinforced concrete inner leaf wall, and then inserting anchoring pieces, wherein the number of the anchoring pieces is 10/m2The arrangement mode adopts a quincunx shape; then, conveying the inner leaf wall with the heat-insulating layer, the die and the die table to a mortar and grid cloth scraping and laying machine in the next process through a rail, scraping and coating a polymer cement mortar layer with the thickness of 1-3 mm on the glass wool board heat-insulating layer, paving a layer of alkali-resistant glass fiber grid cloth on the surface of the first polymer cement mortar layer, pressing the alkali-resistant glass fiber grid cloth into the polymer cement mortar layer by using a compression roller, then scraping and coating a second polymer cement mortar layer with the thickness of 1-3 mm, wherein the thickness of the two polymer cement mortar layers (containing the alkali-resistant glass fiber grid cloth) is 3-5 mm; then pass throughThe track is sent to the lower side of the flexible stone laying machine in the next procedure for laying the flexible stone, and the stainless steel roller on the flexible stone is simultaneously rolled so as to enable the flexible stone decorative layer to be laid flat, compacted and firmly bonded; and then sending the wallboard into a pre-curing kiln for pre-curing, wherein the temperature of the curing kiln is 30-50 ℃, the humidity is 60-80%, after pre-curing for 1-3 hours, sending the integrated wallboard into the curing kiln for curing, the temperature of the curing kiln is 50-70 ℃, the humidity is more than 90%, the curing time is 6-10 hours, and finally, taking out the wallboard from the kiln and removing the formwork to obtain the prefabricated concrete structure wallboard taking the glass wool board as the heat insulation layer.
The prefabricated concrete structure wallboard prepared in the embodiment has the advantages that the thickness of the heat-insulating layer is 250mm, and the heat transfer coefficient is 0.15W/m2K, not only meeting the heat transfer coefficient of less than 0.15W/m in the ultra-low energy consumption building standard2K, and the technical problem of connection safety caused by the super-thick heat-insulating layer of the prefabricated sandwich external wall panel for the ultra-low energy consumption building is solved, and other properties of the wall panel meet the requirements of 'assembled concrete building technical standard' GB/T51231 plus 2016, so that the wall panel has high cost performance.
In the embodiment, the anchoring part adopts the broken heat bridge anchor bolt, so that the heat bridge influence caused by the anchoring part is reduced, and the number of the anchoring parts is increased to 10/m2The wind load resistance of the glass wool plate external thermal insulation thin plastering system is improved, and the connection safety of the system is further improved.
Comparative example 1
This comparative example provides a prefabricated concrete structure wall panel, differing only from example 2: the thickness of the two polymer cement mortar layers (containing one alkali-resistant glass fiber mesh cloth) is 10 mm.
The comparative example also provides a preparation method of the prefabricated concrete structure wallboard, which is only different from the embodiment 2 in that: the polymer cement mortar layer is coated on the glass wool board heat-insulating layer in a scraping mode, the thickness is 3-4 mm, one layer of alkali-resistant glass fiber mesh cloth is laid on the surface of the first polymer cement mortar layer, the polymer cement mortar layer is pressed into by a compression roller, then the second polymer cement mortar layer is coated in a scraping mode, the thickness is 4-6 mm, and the thickness of the two polymer cement mortar layers (containing one layer of alkali-resistant glass fiber mesh cloth) is 7-10 mm.
Compared with the polymer cement mortar layer in the embodiment 2, the total thickness of the polymer cement mortar layer is thicker, but the polymer cement mortar layer cracks through weather resistance tests, so that the integral connection safety of the prefabricated concrete structure wall panel can not be ensured while a thicker heat insulation layer is provided.
Comparative example 2
This comparative example provides a prefabricated concrete structure wall panel, differing only from example 2: and alkali-resistant glass fiber gridding cloth is not contained between the two polymer cement mortar layers.
The comparative example also provides a preparation method of the prefabricated concrete structure wallboard, which is only different from the embodiment 2 in that: the polymer cement mortar layer is coated on the glass wool board heat-insulating layer in a scraping mode, the thickness of the polymer cement mortar layer is 1-3 mm, then a second polymer cement mortar layer is coated in a scraping mode, the thickness of the second polymer cement mortar layer is 1-3 mm, and the thickness of the second polymer cement mortar layer (the inner portion of the second polymer cement mortar layer does not contain alkali-resistant glass fiber gridding cloth) is 3-5 mm.
Compared with the embodiment 2, the waterproof heat-insulating wall panel does not contain the alkali-resistant glass fiber mesh cloth, and weather resistance tests show that the polymer cement mortar layer cracks, so that the waterproof heat-insulating wall panel cannot meet the requirement of ensuring the integral connection safety of the prefabricated concrete structure wall panel while having a thick heat-insulating layer.
Although the invention has been described in detail with respect to the general description and the specific embodiments thereof, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims (10)

1. The utility model provides a precast concrete structure wallboard which characterized in that, including range upon range of setting in proper order: inner leaf walls, heat-insulating layers, outer leaf walls and veneers;
more than two polymer cement mortar layers are stacked in the outer leaf wall, alkali-resistant glass fiber gridding cloth is arranged between the polymer cement mortar layers, and the polymer cement mortar layers are respectively arranged in contact with the heat insulation layer and the facing;
wherein the total thickness of the outer leaf wall is 3-5 mm;
the inner leaf wall and the heat-insulating layer are fixed by adopting an anchoring part; the number of the anchoring parts is more than or equal to 8 per meter2(ii) a The anchor has an effective anchoring depth of greater than or equal to 50 mm.
2. The prefabricated concrete structure wall panel of claim 1, wherein the insulation layer comprises a glass wool board, and basalt fiber is sewn on the glass wool board;
the basalt fiber sewing mode is as follows: sewing a circle on the maximum area plate surface of the glass wool plate at a distance of 45-55 mm from the side length of the periphery to form a basalt fiber ring; and sewing in the basalt fiber ring according to the interval of 95-105 mm in the warp and weft directions.
3. The precast concrete structure wall panel according to claim 2, wherein the basalt fiber is sewn in such a manner that: sewing a circle on the maximum area plate surface of the glass wool plate at a distance of 48-52 mm from the side length of the periphery to form a basalt fiber ring; and sewing in the basalt fiber ring according to the distance of 98-102 mm in the warp and weft directions.
4. A prefabricated concrete structure wall panel according to claim 2 or 3, wherein said glass wool slab has a density of more than 110kg/m3(ii) a And in the direction vertical to the maximum area plate surface of the glass wool plate, the tensile strength of the glass wool plate is greater than or equal to 200 kPa.
5. The precast concrete structure wall panel according to any one of claims 2 to 4, wherein the glass wool panel has a thermal conductivity of 0.033W/m-K or less at 25 ℃ and a fire performance of class A.
6. The precast concrete structure wall panel according to any one of claims 2 to 5, wherein a surface of the glass wool board is coated with a polymer cement waterproof coating; the hydrophobic rate of the glass wool board is more than 99.5 percent.
7. The precast concrete structure wall panel according to claim 6, wherein the polymer cement waterproof coating material is a type I polymer cement waterproof coating material.
8. The precast concrete structure wall panel according to any one of claims 1 to 7, wherein the anchors are arranged in a quincunx shape.
9. The precast concrete structure wall panel according to any one of claims 1 to 8, wherein the anchor is a broken heat bridge anchor bolt when the precast concrete structure wall panel is used for ultra low energy consumption construction or near zero energy consumption construction.
10. Use of the prefabricated concrete structure wall panel of any one of claims 1 to 9 for improving the safety of the prefabricated concrete structure wall panel.
CN202210188124.1A 2022-02-28 2022-02-28 Prefabricated concrete structure wallboard and application thereof Pending CN114607090A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4453359A (en) * 1982-05-07 1984-06-12 Olympian Stone Company, Inc. Building wall panel
CN201024546Y (en) * 2007-03-19 2008-02-20 祝晶静 Hard polyurethane foaming heat preservation wall
CN208251515U (en) * 2018-05-07 2018-12-18 北京建筑材料科学研究总院有限公司 A kind of structure of composite strengthening mineral wool heat insulation decoration integrated plate
CN215483761U (en) * 2021-04-30 2022-01-11 上海雷恩昆美新材料科技有限公司 Assembled concrete building heat preservation integration wallboard

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4453359A (en) * 1982-05-07 1984-06-12 Olympian Stone Company, Inc. Building wall panel
CN201024546Y (en) * 2007-03-19 2008-02-20 祝晶静 Hard polyurethane foaming heat preservation wall
CN208251515U (en) * 2018-05-07 2018-12-18 北京建筑材料科学研究总院有限公司 A kind of structure of composite strengthening mineral wool heat insulation decoration integrated plate
CN215483761U (en) * 2021-04-30 2022-01-11 上海雷恩昆美新材料科技有限公司 Assembled concrete building heat preservation integration wallboard

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