CN102454248A - Steel mesh fiber reinforced concrete composite external wall panel and preparation method thereof - Google Patents
Steel mesh fiber reinforced concrete composite external wall panel and preparation method thereof Download PDFInfo
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- CN102454248A CN102454248A CN2010105291715A CN201010529171A CN102454248A CN 102454248 A CN102454248 A CN 102454248A CN 2010105291715 A CN2010105291715 A CN 2010105291715A CN 201010529171 A CN201010529171 A CN 201010529171A CN 102454248 A CN102454248 A CN 102454248A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02A30/244—Structural elements or technologies for improving thermal insulation using natural or recycled building materials, e.g. straw, wool, clay or used tires
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Abstract
The invention discloses a steel mesh fiber reinforced concrete composite external wall panel and a preparation method thereof. The steel mesh fiber reinforced concrete composite external wall panel comprises an intermediate heat insulation layer and structure layers on the two sides, wherein the intermediate heat insulation layer can select a molded polystyrene plastic foam board, a plastic-extruded polystyrene plastic foam board or a polyurethane foam board, and connecting parts are arranged on the heat insulation board for penetration; and each structure layer is formed by scientifically matching the following three raw materials: a steel mesh, fine aggregate concrete and staple fibers. The preparation method comprises the following steps of: firstly using a plurality of the connecting parts to penetrate through the heat insulation board, connecting the connecting parts with steel mesh pieces on the two sides together, then placing into a mold cavity of a vertical mold, pouring the material of the structure layer on the outer side and curing so as to get the steel mesh fiber reinforced concrete composite external wall panel. The steel mesh fiber reinforced concrete composite external wall panel and the preparation method thereof, disclosed by the invention can play a huge role in the field of buildings and have broad application prospects.
Description
Technical field
The invention belongs to building material field, be specifically related to a kind of steel mesh reinforcement fibrous concrete compound external wall panel and preparation method thereof.
Background technology
Prefabricated composite external wall panel is one of main building product of realizing modernization of the housing industry, and the compound external wall panel with good combination property is to realize construction wall carrying, insulation, decoration integrated key.Domestic existing patent report about compound external wall panel; Introduce like patent of invention CN1436905 " production method of a kind of light energy-saving composite outer wall board and concrete thereof ", be provided with polystyrol plastic foam plate, polystyrol plastic foam plate is provided with three-dimensional wire-mesh reinforcement; Polystyrol plastic foam plate is provided with the concrete deck outward; Be provided with connector in the concrete deck at two ends up and down, an end of connector stretches out outside the concrete deck, and concrete adopts stone flour, rubble, cement and water to mix and processes.Other has utility model patent CN2675762 " assembled light compound external wall panel " to introduce; Comprise surface decoration layer and insulation layer; Be characterized in: insulation layer is clipped among the cage of reinforcement without vibration haydite concrete layer; Form sandwich thermal insulated layer, surface decoration layer is arranged on the surface of cage of reinforcement without vibration haydite concrete layer.
Polystyrol plastic foam plate is provided with three-dimensional wire-mesh reinforcement in the foregoing invention patent, and the deck concrete is to adopt stone flour, rubble, cement and water to mix and process.This reinforcement manner has harmful effect to the thermal transmittance of compound external wall panel, and the deck concrete is an ordinary concrete, and anti-cracking performance is relatively poor relatively.Top layer in the above-mentioned utility model patent is the without vibration haydite concrete, and splitting resistance is also relatively poor relatively.
Summary of the invention
The purpose of this invention is to provide and a kind ofly collect carrying, insulation, decorate for one, have the particularly steel mesh reinforcement fibrous concrete compound external wall panel that improves of anti-cracking performance of good combination property.
For realizing above-mentioned purpose, the present invention takes following technical scheme: a kind of steel mesh reinforcement fibrous concrete compound external wall panel, form by middle heat insulation layer and structure on two sides layer, wherein:
Heat insulation layer can be selected molded polystyrene plastic foamboard, extrusion molding polystyrol plastic foam plate or polyurethane foam plate for use in the middle of said, and on these thermal insulation slabs, has connector to pass; Said connector is conventional L shaped steel muscle connector or triangle reinforcing bar connector.
Said deck is formed through scientific matching by steel mesh reinforcement, pea gravel concreten and three types of materials of short fiber:
Steel mesh reinforcement in the said deck can adopt hot-rolled reinforced bar or cold-drawn low-carbon wire to be welded; The pea gravel concreten match ratio is by weight: (concrete and coal ash): sand=1: 1.5～1: 2.5, wherein flyash: cement=1: 9 or 1: 4 or 3: 7; Water: (concrete and coal ash)=0.40～0.55; Water reducing agent an amount of (consumption is confirmed according to supplier's the recommendation volume and the flowability of required pea gravel concreten compound) is advisable with 0.4～1.0% of (concrete and coal ash) weight.Said short fiber can be selected one or both compound in polypropylene fibre and the vinal for use, and its consumption is 0.05%～0.2% of a pea gravel concreten compound gross mass, and its length is 6mm～12mm.
The specification of said steel mesh reinforcement fibrous concrete compound external wall panel is: (3600～4500) mm * (600～1000) mm * (180～240) mm; The thickness of middle heat insulation layer is 100mm～140mm; Inside structure layer thickness 35mm～70mm, outboard structure layer thickness are 25mm～40mm.
The preferred specification of said steel mesh reinforcement fibrous concrete compound external wall panel is: 3600mm * 800mm * 180mm (heat insulation layer in the middle of 50mm inside structure layer+100mmEPS+30mm outboard structure layer).The 50mm deck is in when bending tension state, and the anti-bending bearing capacity of wallboard under the evenly distributed load effect is 9.2kN/m
2The 30mm deck is in when bending tension state, and the anti-bending bearing capacity of wallboard under the evenly distributed load effect is 7.4kN/m
2
Second purpose of the present invention provides a kind of manufacturing approach of above-mentioned steel mesh reinforcement fibrous concrete compound external wall panel.
Preparation method provided by the present invention is earlier some connectors to be passed thermal insulation slab, and links together with the reinforced mesh of both sides, puts into the formwork erection die cavity then, and cast outboard structure layer material, maintenance obtain steel mesh reinforcement fibrous concrete compound external wall panel.
Specifically, preparation method of the present invention can may further comprise the steps:
1) according to the thickness and the heat insulation layer thickness of compound external wall panel, processes connector; Big face size welded wire fabric sheet according to compound external wall panel;
2) connector is passed thermal insulation slab, two reinforced mesh are placed on the both sides of thermal insulation slab respectively, connector and reinforced mesh are linked together with binding method;
3) formwork erection is in place, and the thermal insulation slab that will have connector and reinforced mesh is put among the formwork erection die cavity, and positions;
4) raw material cement, sand, flyash, water, the water reducing agent with pea gravel concreten described in the structural material mixes, and stirs;
5) continuous stirring adds short fiber gradually, obtains Fiber Distribution uniform fibers concrete mixture;
6) the fibre concrete mixture simultaneous pumping is injected the both sides of formwork erection die cavity thermal insulation slab, the deck of moulding by casting both sides;
7) maintenance in mould, the demoulding, the later stage moisture-keeping maintaining obtains steel mesh reinforcement fibrous concrete compound external wall panel.
In the preparation method of above-mentioned steel mesh reinforcement fibrous concrete compound external wall panel, the formwork erection in the said step 3) is single chamber formwork erection or two-chamber formwork erection; The formwork erection die cavity is of a size of (3600～4500) mm * (600～1000) mm * (180～240) mm.
Curing time was at least moisture-keeping maintaining at least 14 days 12 hours in the mould in the said step 7).
Steel mesh reinforcement fibrous concrete compound external wall panel provided by the invention and preparation method thereof has the following advantages: the deck of (1) compound external wall panel is made up of reinforcing bar, concrete, three types of materials of fiber; Make structural material merge the premium properties of steel concrete and the premium properties of fibrous concrete; Make compound external wall panel not only have enough abilities of bearing imposed load but also can resist the cracking cause owing to shrinking; In the deck concrete mixture, mix short fiber; Can effectively reduce the crackle total amount in the concrete and make the crackle refinement; Thereby improve concrete anti-cracking performance and impervious outlet capacity, reduce the possibility of reinforced mesh corrosion, and can improve the concrete shock resistance of deck.(2) the steel bar stress net sheet in the structure on two sides layer links together through the connector that runs through thermal insulation slab, makes the structure on two sides layer become a stressed integral body, helps the raising of compound external wall panel structural performance.(3) make compound external wall panel with the formwork erection cast, the inside and outside surface of side fascia is all very smooth, need not plaster leveling during application.The present invention will play a great role at building field, have a extensive future.
Below in conjunction with specific embodiment the present invention is explained further details.
Description of drawings
Fig. 1 is a steel mesh reinforcement fibrous concrete compound external wall panel cross-sectional structure sketch map
The specific embodiment
As shown in Figure 1, gauze wire cloth fibrous concrete compound external wall panel provided by the invention, the deck 1 of heat insulation layer 2 and both sides in the middle of on thickness direction, comprising, and establish a plurality of connectors 3 and vertically pass two decks 1, middle heat insulation layer 2.The specification of the compound external wall panel that the present invention is suitable for is: (3600～4500) mm * (600～1000) mm * (180～240) mm; The thickness of middle heat insulation layer is 100mm～140mm; Inside structure layer (side inwardly) thickness 35mm～70mm, outboard structure layer (side outwardly) thickness is 25mm～40mm.
Heat insulation layer 2 can be selected molded polystyrene foamed plastics commonly used, extrusion molding polystyrene polyfoam or polyurethane foam for use in the middle of said.
Said connector 3 is conventional L shaped steel muscle connector or triangle reinforcing bar connector.Use this connector both can play the effect of transmitting load, can improve the anti-shearing stress between deck and the heat insulation layer again.
Said deck 1 is made up of following three types of materials, wherein:
Steel mesh reinforcement referring to shown in Figure 1, interweaves, can adopt hot-rolled reinforced bar or cold-drawn low-carbon wire to be welded by steel bar stress or steel wire 11 with distributing bar or steel wire 12, distribution a slice reinforced mesh in every side structure layer, and size should cooperate the big face size of compound external wall panel;
The pea gravel concreten compound, its match ratio is by weight: (concrete and coal ash): sand=1: 1.5～2.5, wherein flyash: cement=1: 9 or 1: 4 or 3: 7; Water: (concrete and coal ash)=0.40～0.55; Water reducing agent an amount of (consumption is confirmed according to supplier's the recommendation volume and the flowability of required pea gravel concreten compound) is advisable with 0.4～1.0% of (concrete and coal ash) weight;
Short fiber can be selected one or both compound in polypropylene fibre and the vinal for use, and its consumption is 0.05%～0.2% of a pea gravel concreten compound gross mass, and its length is 6mm～12mm.
The fibre concrete mixture that is mixed by pea gravel concreten compound and short fiber is used as the material of pouring into a mould the structure on two sides layer.
What these materials were brought into play in the present invention act as:
Heat insulation layer:, select flame retardant type molded polystyrene foamed plastics, extrusion molding polystyrene polyfoam or polyurethane foam for use for compound external wall panel provides heat-insulating property.
Steel mesh reinforcement: be the steel bar stress in the compound external wall panel, can improve concrete tensile property and bending resistance, can select HPB235 reinforcing bar, HRB335 reinforcing bar or cold-drawn low-carbon wire for use.
Pea gravel concreten: the stock of compound external wall panel deck, requiring the minimum intensity grade is C30, prepares through the rational proportion of cement, sand, flyash, water, water reducing agent.
Chopped strand: can effectively reduce the crackle total amount in the concrete and make the crackle refinement, thereby improve concrete anti-cracking performance and impervious outlet capacity, reduce the possibility of reinforced mesh corrosion, and can improve the concrete shock resistance of deck; Can select a kind of in polypropylene fibre, the vinal for use or the two is compound.
The preparation method of gauze wire cloth fibrous concrete compound external wall panel of the present invention; Be earlier some connectors to be passed heat insulation layer; And link together with the reinforced mesh of both sides; Put into the formwork erection die cavity then, cast structure on two sides layer material (fibre concrete mixture that pea gravel concreten compound and short fiber mix), maintenance obtain compound external wall panel.
Specifically, the forming process of said gauze wire cloth fibrous concrete compound external wall panel can may further comprise the steps:
1), selects the connector of matching size for use according to the thickness and the heat insulation layer thickness of compound external wall panel; Big face size welded wire fabric sheet according to compound external wall panel;
2) connector is passed heat insulation layer (thermal insulation slab), two reinforced mesh are placed on the both sides of thermal insulation slab respectively and keep a gap with thermal insulation slab, connector and reinforced mesh are linked together with binding method;
3) formwork erection is in place, and the thermal insulation slab that will have connector and reinforced mesh is put among the formwork erection die cavity, and positions;
4) raw material cement, sand, flyash, water, the water reducing agent with pea gravel concreten described in the structural material mixes, and stirring obtains the pea gravel concreten compound;
5) continuous stirring and in the pea gravel concreten compound, add short fiber gradually obtains Fiber Distribution uniform fibers concrete mixture;
6) the fibre concrete mixture simultaneous pumping is injected the both sides of formwork erection die cavity thermal insulation slab, the deck of moulding by casting both sides;
7) maintenance in mould, the demoulding, the later stage moisture-keeping maintaining obtains steel mesh reinforcement fibrous concrete compound external wall panel.
In the preparation method of above-mentioned steel mesh reinforcement fibrous concrete compound external wall panel, the formwork erection in the said step 3) is single chamber formwork erection or two-chamber formwork erection; The formwork erection die cavity is of a size of (3600～4500) mm * (600～1000) mm * (180～240) mm.
Curing time was at least 12 hours in the mould in the said step 7); Moisture-keeping maintaining at least 14 days.
Embodiment provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment being to implement under the prerequisite with technical scheme of the present invention.
Method therefor is conventional method if no special instructions among the following embodiment.
Embodiment 1, preparation gauze wire cloth fibrous concrete compound external wall panel
Middle heat insulation layer: selecting thickness for use is the molded polystyrene plastic foamboard of 100mm, uses the L shaped steel muscle connector of height as 150mm, on the plate width direction at interval 300mm, on the position of interval 600mm on the plate length direction, passing.
The outboard structure layer: steel mesh reinforcement, selecting nominal diameter for use is the HPB235 reinforcing bar of 8mm, is welded into reinforced mesh; Pea gravel concreten, its match ratio is: (concrete and coal ash): sand=1: 1.5, flyash: cement=1: 4, water: (concrete and coal ash)=0.45, high efficiency water reducing agent (polycarboxylate) consumption is 0.5% of cement and a flyash total amount; Short fiber is selected polypropylene fibre for use, and consumption is 0.05% of a pea gravel concreten quality, and length is 6mm.
Prepare gauze wire cloth fibrous concrete compound external wall panel with method of the present invention, concrete grammar may further comprise the steps:
1) on thermal insulation slab, wears connector: get the molded polystyrene plastic foam plate that is of a size of 3560mm * 760mm * 100mm; According to the connector position that designs in advance; In the thermal insulation slab marked and process the hole of undersized in the connector size; Connector is passed thermal insulation slab, and carry out Primary Location, obtain thermal insulation slab with connector.
2) reinforced mesh location: get two reinforced mesh that welding in advance is good, be placed on the both sides of the thermal insulation slab of band connector respectively, connector and reinforced mesh are linked together with binding method; Obtain " assembly of thermal insulation slab and steel mesh reinforcement ", this assembly is placed among the formwork erection die cavity that is of a size of 3600mm * 800mm * 180mm, and positions.
3) composite exterior wall sheet metal forming: with 90 kilograms in 40 kilograms in 300 kilograms of 160 kilograms of raw material cement, sands, flyash, water, 1.0 kilograms of the high efficiency water reducing agents of deck pea gravel concreten; Drop in the mixer and stir; Add 0.3 kilogram of polypropene staple then gradually, continue to stir formation uniform fibers concrete mixture.
4) this mixture pump is delivered to the thermal insulation slab both sides in the formwork erection die cavity, moulding by casting.
5) in mould, leave standstill at least the demoulding behind the 12h, later stage moisture-keeping maintaining at least 14 days obtains gauze wire cloth fibrous concrete compound external wall panel.
Embodiment 2, preparation gauze wire cloth fibrous concrete compound external wall panel
Middle heat insulation layer: selecting thickness for use is the molded polystyrene plastic foamboard of 100mm, uses the triangle reinforcing bar connector of height as 150mm, on the plate width direction at interval 300mm, on the position of interval 600mm on the plate length direction, passing.
The outboard structure layer: steel mesh reinforcement, selecting nominal diameter for use is the low-carbon (LC) cold drawn wire of 4mm, is welded into reinforced mesh; Pea gravel concreten, its match ratio is: (concrete and coal ash): sand=1: 2.0, flyash: cement=3: 7, water: (concrete and coal ash)=0.52, high efficiency water reducing agent (amidosulfonic acid salt) consumption is 0.75% of cement and a flyash total amount; Short fiber is selected vinal for use, and consumption is 0.1% of a pea gravel concreten quality, and length is 12mm.
Prepare gauze wire cloth fibrous concrete compound external wall panel with method of the present invention, concrete grammar may further comprise the steps:
1) on thermal insulation slab, wears connector: get the molded polystyrene plastic foam plate that is of a size of 3560mm * 760mm * 100mm; According to the connector position that designs in advance; In the thermal insulation slab marked and process the hole of undersized in the connector size; Connector is passed thermal insulation slab, and carry out Primary Location, obtain thermal insulation slab with connector.
2) reinforced mesh location: get two reinforced mesh that welding in advance is good, be placed on the both sides of the thermal insulation slab of band connector respectively, connector and reinforced mesh are linked together with binding method; Obtain " assembly of thermal insulation slab and steel mesh reinforcement ", this assembly is placed among the formwork erection die cavity that is of a size of 3600mm * 800mm * 180mm, and positions.
3) composite exterior wall sheet metal forming: with 83.2 kilograms in 48 kilograms in 320 kilograms of 112 kilograms of raw material cement, sands, flyash, water, 1.2 kilograms of the high efficiency water reducing agents of deck pea gravel concreten; Drop in the mixer and stir; Add 0.56 kilogram on polyvinyl alcohol short fiber then gradually, continue to stir formation uniform fibers concrete mixture.
4) this mixture pump is delivered to the thermal insulation slab both sides in the formwork erection die cavity, moulding by casting.
5) in mould, leave standstill at least the demoulding behind the 12h, later stage moisture-keeping maintaining at least 14 days obtains gauze wire cloth fibrous concrete compound external wall panel.
Embodiment 3, preparation gauze wire cloth fibrous concrete compound external wall panel
Middle heat insulation layer: selecting thickness for use is the extrusion molding polystyrol plastic foam plate of 100mm, uses the triangle reinforcing bar connector of height as 150mm, on the plate width direction at interval 300mm, on the position of interval 600mm on the plate length direction, passing.
Outboard structure layer: steel mesh reinforcement: selecting nominal diameter for use is the HPB235 reinforcing bar of 8mm, is welded into reinforced mesh; Pea gravel concreten, its match ratio is: (concrete and coal ash): sand=1: 2.5, flyash: cement=1: 9, water: (concrete and coal ash)=0.52, high efficiency water reducing agent (sulfonated melamine resin) consumption is 1.0% of cement and a flyash total amount; Short fiber is selected polypropylene fibre and vinal for use, the polypropylene fibre consumption be the pea gravel concreten quality 0.02%, length is 6mm, the vinal consumption be the pea gravel concreten quality 0.06%, length is 12mm.
Prepare gauze wire cloth fibrous concrete compound external wall panel with method of the present invention, concrete grammar may further comprise the steps:
1) on thermal insulation slab, wears connector: get the extruded polystyrene plastic foam plate that is of a size of 3560mm * 760mm * 100mm; According to the connector position that designs in advance; In the thermal insulation slab marked and process undersized and connector is passed thermal insulation slab in the hole of connector size; And fix with special fastener, obtain thermal insulation slab with connector.
2) reinforced mesh location: get two reinforced mesh that welding in advance is good, be placed on the both sides of the thermal insulation slab of band connector respectively, connector and reinforced mesh are linked together with binding method or fastener; Obtain " assembly of thermal insulation slab and steel mesh reinforcement ", this assembly is placed among the formwork erection die cavity that is of a size of 3600mm * 800mm * 180mm, and positions.
3) composite exterior wall sheet metal forming: with 72.8 kilograms in 14 kilograms in 350 kilograms of 126 kilograms of raw material cement, sands, flyash, water, 1.4 kilograms of the high efficiency water reducing agents of deck pea gravel concreten; Drop in the mixer and stir; Add 0.34 kilogram on polyvinyl alcohol short fiber, 0.11 kilogram of polypropene staple then gradually, continue to stir formation uniform fibers concrete mixture.
4) this mixture pump is delivered to the thermal insulation slab both sides in the formwork erection die cavity, moulding by casting.
5) in mould, leave standstill at least the demoulding behind the 12h, later stage moisture-keeping maintaining at least 14 days obtains gauze wire cloth fibrous concrete compound external wall panel.
Embodiment 4, preparation gauze wire cloth fibrous concrete compound external wall panel
Middle heat insulation layer: selecting thickness for use is the polyurethane foam plate of 140mm, uses the L shaped steel muscle connector of height as 190mm, on the plate width direction at interval 300mm, on the position of interval 600mm on the plate length direction, passing.
The outboard structure layer: steel mesh reinforcement, selecting nominal diameter for use is the HRB335 reinforcing bar of 8mm, is welded into reinforced mesh; Pea gravel concreten, its match ratio is: (concrete and coal ash): sand=1: 1.5, flyash: cement=1: 9, water: (concrete and coal ash)=0.40, high efficiency water reducing agent (sulfonated melamine resin) consumption is 1.0% of cement and a flyash total amount; Short fiber is selected vinal for use, and consumption is 0.2% of a pea gravel concreten quality, and length is 9mm.
Prepare gauze wire cloth fibrous concrete compound external wall panel with method of the present invention, concrete grammar may further comprise the steps:
1) on thermal insulation slab, wears connector: get the polyurethane foam plate that is of a size of 4460mm * 960mm * 140mm; According to the connector position that designs in advance; In the thermal insulation slab marked and process the hole of undersized in the connector size; Connector is passed thermal insulation slab, obtain thermal insulation slab with connector.
2) reinforced mesh location: get two reinforced mesh that welding in advance is good, be placed on the both sides of the thermal insulation slab of band connector respectively, connector and reinforced mesh are linked together with binding method; Obtain " assembly of thermal insulation slab and steel mesh reinforcement ", this assembly is placed among the formwork erection die cavity that is of a size of 4500mm * 1000mm * 240mm, and positions.
3) composite exterior wall sheet metal forming: with stirring in 160 kilograms in 40 kilograms in 600 kilograms of 360 kilograms of raw material cement, sands, flyash, the water of deck pea gravel concreten, 4 kilograms of input mixers of high efficiency water reducing agent (sulfonated melamine resin); Add 2.3 kilograms of vinals then gradually, continue to stir formation uniform fibers concrete mixture.
4) this mixture pump is delivered to the thermal insulation slab both sides in the formwork erection die cavity, moulding by casting.
5) in mould, leave standstill at least the demoulding behind the 12h, later stage moisture-keeping maintaining at least 14 days obtains gauze wire cloth fibrous concrete compound external wall panel.
Embodiment 5, preparation gauze wire cloth fibrous concrete compound external wall panel
Middle heat insulation layer: selecting thickness for use is the extrusion molding polystyrol plastic foam plate of 120mm, uses height as 160mm triangle reinforcing bar connector, on the plate width direction at interval 300mm, on the position of interval 600mm on the plate length direction, passing.
The outboard structure layer: steel mesh reinforcement, selecting nominal diameter for use is the low-carbon (LC) cold drawn wire of 4mm, is welded into reinforced mesh; Pea gravel concreten, its match ratio is: (concrete and coal ash): sand=1: 1.8, flyash: cement=1: 4, water: (concrete and coal ash)=0.55, high efficiency water reducing agent (amidosulfonic acid salt) consumption is 0.4% of cement and a flyash total amount; Short fiber is selected vinal for use, consumption be the pea gravel concreten quality 0.15%, length is 12mm.
Prepare gauze wire cloth fibrous concrete compound external wall panel with method of the present invention, concrete grammar may further comprise the steps:
1) on thermal insulation slab, wears connector: get the molded polystyrene plastic foam plate that is of a size of 3560mm * 560mm * 120mm; According to the connector position that designs in advance; In the thermal insulation slab marked and process undersized and connector is passed thermal insulation slab in the hole of connector size; And fix with special fastener, obtain thermal insulation slab with connector.
2) reinforced mesh location: get two reinforced mesh that welding in advance is good, be placed on the both sides of the thermal insulation slab of band connector respectively, connector and reinforced mesh are linked together with binding method or fastener; Obtain " assembly of thermal insulation slab and steel mesh reinforcement ", this assembly is placed among the formwork erection die cavity that is of a size of 3600mm * 600mm * 200mm, and positions.
3) composite exterior wall sheet metal forming: with 82.5 kilograms in 30 kilograms in 270 kilograms of 120 kilograms of raw material cement, sands, flyash, water, 0.6 kilogram of the high efficiency water reducing agent (amidosulfonic acid salt) of deck pea gravel concreten; Drop in the mixer and stir; Add 0.75 kilogram of vinal then gradually, continue to stir formation uniform fibers concrete mixture.
4) this mixture pump is delivered to the thermal insulation slab both sides in the formwork erection die cavity, moulding by casting.
5) in mould, leave standstill at least the demoulding behind the 12h, later stage moisture-keeping maintaining at least 14 days obtains gauze wire cloth fibrous concrete compound external wall panel.
Comparative example, preparation steel-wire-net reinforced concrete compound external wall panel
Middle heat insulation layer: selecting thickness for use is the molded polystyrene plastic foamboard of 100mm, uses the triangle reinforcing bar connector of height as 150mm, on the plate width direction at interval 300mm, on the position of interval 600mm on the plate length direction, passing.
The outboard structure layer: steel mesh reinforcement, selecting nominal diameter for use is the low-carbon (LC) cold drawn wire of 4mm, is welded into reinforced mesh; Pea gravel concreten, its match ratio is: (concrete and coal ash): sand=1: 2.0, flyash: cement=3: 7, water: (concrete and coal ash)=0.52, high efficiency water reducing agent (amidosulfonic acid salt) consumption is 0.75% of cement and a flyash total amount.
Preparation steel-wire-net reinforced concrete compound external wall panel, concrete grammar may further comprise the steps:
1) on thermal insulation slab, wears connector: get the molded polystyrene plastic foam plate that is of a size of 3560mm * 760mm * 100mm; According to the connector position that designs in advance; In the thermal insulation slab marked and process the hole of undersized in the connector size; Connector is passed thermal insulation slab, and carry out Primary Location, obtain thermal insulation slab with connector.
2) reinforced mesh location: get two reinforced mesh that welding in advance is good, be placed on the both sides of the thermal insulation slab of band connector respectively, connector and reinforced mesh are linked together with binding method; Obtain " assembly of thermal insulation slab and steel mesh reinforcement ", this assembly is placed among the formwork erection die cavity that is of a size of 3600mm * 800mm * 180mm, and positions.
3) composite exterior wall sheet metal forming: with 83.2 kilograms in 48 kilograms in 320 kilograms of 112 kilograms of raw material cement, sands, flyash, water, 1.2 kilograms of the high efficiency water reducing agents of deck pea gravel concreten; Drop in the mixer and stir formation uniform fibers concrete mixture.
4) this mixture pump is delivered to the thermal insulation slab both sides in the formwork erection die cavity, moulding by casting.
5) in mould, leave standstill at least the demoulding behind the 12h, later stage moisture-keeping maintaining at least 14 days obtains the steel-wire-net reinforced concrete compound external wall panel.
The performance test of gauze wire cloth fibrous concrete compound external wall panel and comparative example
Structural performance (crooked evenly distributed load, maximum crack width): adopt GB 50204-2002 " concrete structure engineering construction quality standards of acceptance, appendix C: the prefabricated units structural performance method of inspection " standard test.
Deck fibrous concrete cracking resistance: adopt JC/T 951-2005 " cement mortar cracking resistance test method " standard test.
1, structural performance test result:
Gauze wire cloth fibrous concrete compound external wall panel specification: 3600mm * 1000mm * 180mm (50mm inside structure layer+100mmEPS heat insulation layer+30mm outboard structure layer); The 50mm deck is in when bending tension state, and wallboard bears 9.2kN//m
2Crooked evenly distributed load the time, maximum crack width is 0.8mm; The 30mm deck is in when bending tension state, and wallboard bears 7.4kN//m
2Crooked evenly distributed load the time, maximum crack width is 1.5mm.
The comparative example steel-wire-net reinforced concrete compound external wall panel of same specification, 50mm deck are in when bending tension state, and wallboard bears 8.2kN//m
2Crooked evenly distributed load the time, maximum crack width is 1.5mm; The 30mm deck is in when bending tension state, and wallboard bears 4.8kN//m
2Crooked evenly distributed load the time, maximum crack width is 1.5mm.
Reach the sign that 1.5mm is the utmost carrying ability state with maximum crack width; Contrast the gauze wire cloth fibrous concrete compound external wall panel of the present invention and the comparative example steel-wire-net reinforced concrete compound external wall panel of same specification, can find out: add the counter-bending supporting capacity that fiber can improve wallboard.
2, deck fibrous concrete cracking resistance test result:
With embodiment 2 is example; Fiber finer stone concrete match ratio of the present invention: (concrete and coal ash): sand=1: 2.0; Flyash: cement=3: 7, water: (concrete and coal ash)=0.52, high efficiency water reducing agent (amidosulfonic acid salt) consumption is 0.75% of cement and a flyash total amount.Short fiber is selected vinal for use, and consumption is 0.1% of a pea gravel concreten quality, and length is 12mm.
Comparative Examples pea gravel concreten match ratio: (concrete and coal ash): sand=1: 2.0, flyash: cement=3: 7, water: (concrete and coal ash)=0.52, high efficiency water reducing agent (amidosulfonic acid salt) consumption is 0.75% of cement and a flyash total amount.Do not add short fiber in the Comparative Examples.
The cracking resistance test result: fiber finer stone concrete cracking index is 130mm, and the cracking index of Comparative Examples pea gravel concreten is 375mm; Can know that relatively anti-cracking performance improved 65.3% after the present invention added short fiber.
Claims (10)
1. a steel mesh reinforcement fibrous concrete compound external wall panel is made up of middle heat insulation layer and structure on two sides layer, wherein:
Heat insulation layer can be selected molded polystyrene plastic foamboard, extrusion molding polystyrol plastic foam plate or polyurethane foam plate for use in the middle of said, and on these thermal insulation slabs, is provided with connector and passes;
Said deck is provided with steel mesh reinforcement, and the fibrous concrete that is formed by pea gravel concreten and short fiber compound of encirclement steel mesh reinforcement pours into layer.
2. steel mesh reinforcement fibrous concrete compound external wall panel according to claim 1 is characterized in that: the steel mesh reinforcement in the said deck adopts hot-rolled reinforced bar or cold-drawn low-carbon wire to be welded.
3. steel mesh reinforcement fibrous concrete compound external wall panel according to claim 1 and 2; It is characterized in that: said pea gravel concreten comprises cement, flyash, sand, water and water reducing agent; Its match ratio is by weight: (concrete and coal ash): sand=1: 1.5～1: 2.5, wherein flyash: cement=1: 9 or 1: 4 or 3: 7; Water: (concrete and coal ash)=0.40～0.55; The water reducing agent consumption is confirmed according to supplier's the recommendation volume and the flowability of required pea gravel concreten compound, is advisable with 0.4～1.0% of (concrete and coal ash) weight.
4. according to claim 1 or 2 or 3 described steel mesh reinforcement fibrous concrete compound external wall panels; It is characterized in that: said short fiber is selected one or both compound in polypropylene fibre and the vinal for use; Its length is 6mm～12mm, and its consumption is 0.05%～0.2% of a pea gravel concreten compound gross mass.
5. according to the described steel mesh reinforcement fibrous concrete of aforementioned arbitrary claim compound external wall panel; It is characterized in that: the specification of said steel mesh reinforcement fibrous concrete compound external wall panel is: (3600～4500) mm * (600～1000) mm * (180～240) mm; The thickness of middle heat insulation layer is 100mm～140mm; Inside structure layer thickness 35mm～70mm, outboard structure layer thickness are 25mm～40mm.
6. steel mesh reinforcement fibrous concrete compound external wall panel according to claim 5 is characterized in that: the specification of said steel mesh reinforcement fibrous concrete compound external wall panel is: 3600mm * 1000mm * 180mm (heat insulation layer in the middle of 50mm inside structure layer+100mmEPS+30mm outboard structure layer).
7. the preparation method of the arbitrary said steel mesh reinforcement fibrous concrete compound external wall panel of claim 1 to 6; Be earlier some connectors to be passed thermal insulation slab; And link together with the reinforced mesh of both sides; Put into the formwork erection die cavity then, cast outboard structure layer material, maintenance obtain steel mesh reinforcement fibrous concrete compound external wall panel.
8. preparation method according to claim 7 is characterized in that: said preparation method may further comprise the steps:
1) selects connector according to the thickness and the heat insulation layer thickness of compound external wall panel; Big face size welded wire fabric sheet according to compound external wall panel;
2) connector is passed thermal insulation slab, two reinforced mesh are placed on the both sides of thermal insulation slab respectively, connector and reinforced mesh are linked together with binding method;
3) formwork erection is in place, and the thermal insulation slab that will have connector and reinforced mesh is put among the formwork erection die cavity, and positions;
4) raw material cement, sand, flyash, water, the water reducing agent with pea gravel concreten described in the structural material mixes, and stirs;
5) add short fiber under the continuous stirring, obtain Fiber Distribution uniform fibers concrete mixture;
6) the fibre concrete mixture simultaneous pumping is injected the both sides of formwork erection die cavity thermal insulation slab, the deck of moulding by casting both sides;
7) maintenance in mould, the demoulding, the later stage moisture-keeping maintaining obtains steel mesh reinforcement fibrous concrete compound external wall panel.
9. preparation method according to claim 8 is characterized in that: the formwork erection in the said step 3) is single chamber formwork erection or two-chamber formwork erection; The formwork erection die cavity is of a size of (3600～4500) mm * (600～1000) mm * (180～240) mm.
10. it is characterized in that according to Claim 8 or 9 described preparation methods: curing time was at least moisture-keeping maintaining at least 14 days 12 hours in the mould in the said step 7).
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| CN113027037A (en) * | 2021-03-11 | 2021-06-25 | 富思特新材料科技发展股份有限公司 | External wall panel, processing method thereof and building |
| CN115324273A (en) * | 2022-09-06 | 2022-11-11 | 郑州工大高新材料科技有限公司 | Prefabricated building structure-heat preservation-decoration integrated composite external wall panel and preparation method thereof |
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| CN110497503A (en) * | 2018-05-16 | 2019-11-26 | 科思创德国股份有限公司 | A kind of preparation method of polyurethane precast slab |
| CN109592944A (en) * | 2018-12-27 | 2019-04-09 | 北京市市政工程研究院 | A kind of ultra-high performance concrete and a kind of ultra-high performance concrete cored slab and preparation method thereof |
| CN110421683A (en) * | 2019-07-02 | 2019-11-08 | 南通长城建筑科技有限公司 | A kind of production technology of building structure integration heat-insulation wall plate |
| CN113027037A (en) * | 2021-03-11 | 2021-06-25 | 富思特新材料科技发展股份有限公司 | External wall panel, processing method thereof and building |
| CN115324273A (en) * | 2022-09-06 | 2022-11-11 | 郑州工大高新材料科技有限公司 | Prefabricated building structure-heat preservation-decoration integrated composite external wall panel and preparation method thereof |
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Application publication date: 20120516 |