CN110344537A - A kind of prefabricated sandwich heat-preserving wall and preparation method thereof based on board-like perforation type FRP connector - Google Patents

A kind of prefabricated sandwich heat-preserving wall and preparation method thereof based on board-like perforation type FRP connector Download PDF

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Publication number
CN110344537A
CN110344537A CN201910627347.1A CN201910627347A CN110344537A CN 110344537 A CN110344537 A CN 110344537A CN 201910627347 A CN201910627347 A CN 201910627347A CN 110344537 A CN110344537 A CN 110344537A
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China
Prior art keywords
concrete
board
connector
fiber
frp connector
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Pending
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CN201910627347.1A
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Chinese (zh)
Inventor
尹世平
李传秀
王菲
赵俊伶
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China University of Mining and Technology CUMT
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China University of Mining and Technology CUMT
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Priority to CN201910627347.1A priority Critical patent/CN110344537A/en
Publication of CN110344537A publication Critical patent/CN110344537A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28BSHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00Producing shaped prefabricated articles from the material
    • B28B1/30Producing shaped prefabricated articles from the material by applying the material on to a core or other moulding surface to form a layer thereon
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28BSHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00Producing shaped prefabricated articles from the material
    • B28B1/52Producing shaped prefabricated articles from the material specially adapted for producing articles from mixtures containing fibres, e.g. asbestos cement
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28BSHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00Producing shaped prefabricated articles from the material
    • B28B1/52Producing shaped prefabricated articles from the material specially adapted for producing articles from mixtures containing fibres, e.g. asbestos cement
    • B28B1/525Producing shaped prefabricated articles from the material specially adapted for producing articles from mixtures containing fibres, e.g. asbestos cement containing organic fibres, e.g. wood fibres
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/04Portland cements
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04CSTRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/26Building 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
    • E04C2/284Building 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
    • E04C2/288Building 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 composed of insulating material and concrete, stone or stone-like material
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04CSTRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/26Building 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
    • E04C2/284Building 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
    • E04C2/288Building 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 composed of insulating material and concrete, stone or stone-like material
    • E04C2/2885Building 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 composed of insulating material and concrete, stone or stone-like material with the insulating material being completely surrounded by, or embedded in, a stone-like material, e.g. the insulating material being discontinuous
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04CSTRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/30Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00Adapting or protecting infrastructure or their operation
    • Y02A30/24Structural elements or technologies for improving thermal insulation
    • Y02A30/244Structural elements or technologies for improving thermal insulation using natural or recycled building materials, e.g. straw, wool, clay or used tires
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00Adapting or protecting infrastructure or their operation
    • Y02A30/30Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways

Abstract

The invention discloses a kind of prefabricated sandwich heat-preserving walls and preparation method thereof based on board-like perforation type FRP connector, including internal layer concrete slab, outer concrete plate, intermediate insulating layer and FRP connector;The inside and outside layer concrete plate is combined by fiber knitted net and ECC concrete, internal layer concrete slab, intermediate insulating layer, affixed between outer concrete plate is realized by the FRP connector that laterally wears, and the both sides of the edge position that FRP connector is located in inside and outside layer concrete plate opens up hole by spacing.The present invention makes full use of the features such as board-like perforation type FRP connector high corrosion resistance, low thermal conductivity, eliminate heat bridge effect, the problems such as connector for improving safety and the durability of wall, while solving conventional vacuum wall is bonded with sandwich of layers, concrete interface and anchoring property is poor.

Description

A kind of prefabricated sandwich heat-preserving wall and its system based on board-like perforation type FRP connector Make method
Technical field
The present invention relates to a kind of prefabricated sandwich heat-preserving wall and preparation method thereof based on board-like perforation type FRP connector, Belong to technical field of building construction.
Background technique
China is energy consumption big country, and on building, building energy conservation is to alleviate the energy for about 30% consumption in total energy consumption One important measures of shortage, wherein improving heat-preserving wall form in wall energy conservation is to realize the most important hand of building energy conservation Section.Currently, common heat-preserving wall has inside holding, external thermal insulation and sandwiched thermal-insulating wall in architectural engineering.Inside holding is in wall Portion reduces the usable floor area in house, and is affected by interior decoration.And external heat insulating wall there is more serious fire prevention and Endurance issues.Sandwich structure is a kind of achievable load-bearing and the novel heat preservation structure for going along with sb. to guard him the same service life, have light thin-wall, every The advantages that sound, heat-insulated, antidetonation, simple heat preservation and mounting process.In this configuration, insulating layer be placed in two layers of concrete slab it Between, to significantly improve the durability and fire resistance of insulation system, insulation system and main structure same service life are realized, is dropped The Life cycle cost of low building.
Sandwich structure is made of inside and outside concrete slab, intermediate insulating layer and connector, has light weight, intensity height, heat preservation The advantages that effect is good.Wherein connector is the key position of siphonal lobe concrete slab in connecting, and stress performance directly affects wall Safety.Common Sandwich heat insulation connecting piece is broadly divided into regular reinforcement connector, metal alloy connector and compo (FRP) three kinds of connector: it is regular reinforcement connector low cost, easy for installation, but it is inevitably present steel bars corrosion problem, it presses According to corresponding design specification, it is desirable that have the concrete cover of respective thickness to avoid the corrosion of reinforcing bar, increase sandwich in this way The thickness of plate, increases the self weight of structure, is very unfavorable for overall structure.And protective layer thickness will affect and split The width of seam, protective layer is thicker, and surface crack width is bigger.It thus needs to reduce protective layer thickness as far as possible.Another party Face, the reduction or optimization of interior siphonal lobe concrete slab thickness would generally be required to be limited by minimum concrete cover, with reduction The requirement of protective layer thickness is again conflicting, and suitable method is needed to solve.In addition reinforcing bar thermal coefficient is high, and wall is connecting Part position is also easy to produce heat bridge, it is difficult to meet wall energy-saving index requirement.Metal alloy connector corrosion resistance is good, durability Height, thermal coefficient is lower, but the price of connector is higher.FRP as a kind of novel high-performance material, have thermal coefficient it is low, The advantages that durability is good, low cost, high intensity can effectively avoid the heat of connecting portion using the thermal insulator connector that FRP makes Bridge effect improves heat insulation effect and the safety of wall.
However, presently, there are such as " bar type " FRP connector, be easy to occur to squeeze when concrete is by external force broken It is bad etc.;" board-like " although FRP connector improves the adhesive property of concrete and laminboard layer and connector to a certain extent, It is perfect not enough in its bond area, type of attachment, lead to problems such as anchoring property poor.
It is multiaxis fiber knitted net that fiber knitted net, which enhances concrete (Textile Reinforced Concrete, TRC), With the combination of fine concrete, there is good carrying, limit to split, impervious and corrosion resistance.Fiber knitted net is along principal stress side To distribution, bearing capacity can be not only provided, but also the failure mode that structure can be made to generate multiple cracking distribution.But due to fine concrete Ductility it is lower, although so that matrix generate many cracks, slit width is larger, cannot preferably play the effect of TRC.Engineering water Cement-based composite material (Engineered Cementitious Composites, ECC) has tensile strain hardening and multiple cracking Feature.Chopped strand is mainly used to Restricted Crack Width and has basis material to generate a plurality of fine and closely woven crack under stress condition Ability, but since chopped strand is in random distribution in the base, carrying direction is indefinite, causes the enhancing efficiency of ECC lower. Therefore, a kind of new fiber knitted net enhancing concrete plate can be developed using ECC as the matrix of TRC.One side fiber is compiled Knitmesh is as main stress reinforcing rib, and for bearing load, chopped strand is used to limit fracture interval, improves the cracking in crack Form.
To sum up, the popularization and application of sandwiched thermal-insulating wall are the effective ways of realization building energy conservation, and in order to further improve Its bearing capacity and overall performance, the inside and outside impeller by the compound ECC of fiber knitted net as sandwich wall, and worn using board-like Pass FRP connector connects inside and outside concrete slab and moderate soak interlayer, is a kind of rationally effective mode.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the present invention provides a kind of based on board-like perforation type FRP Prefabricated sandwich heat-preserving wall of connector and preparation method thereof makes full use of board-like perforation type FRP connector higher anticorrosive Property, low thermal coefficient, the advantages of the heat bridge effect for effectively avoiding generic connectivity part from generating, while solving conventional vacuum wall The problems such as connector and sandwich of layers, concrete interface bond and anchoring property is poor.
Technical solution: to achieve the above object, the technical solution adopted by the present invention are as follows:
A kind of prefabricated sandwich heat-preserving wall based on board-like perforation type FRP connector, including internal layer concrete slab, outer layer are mixed Concrete board, intermediate insulating layer and FRP connector;
Wherein, the internal layer concrete slab, outer concrete plate are combined by fiber knitted net and ECC concrete, Internal layer concrete slab, intermediate insulating layer, affixed between outer concrete plate is realized by the FRP connector that laterally wears, and FRP connector is located at internal layer concrete slab, the both sides of the edge position in outer concrete plate opens up hole by spacing.
Further, the fiber knitted net uses carbon fiber, aramid fiber, alkali-resistant glass fibre, basalt fibre, gathers One or both of alcohol fibers or polyethylene fibre are made into net by radial direction and broadwise.
Further, the FRP connector is that fiber stack is laminated the chopped mat to be formed, with a thickness of 2.5-5mm, density For 500g/m2, used fiber is alcohol fibers, polyethylene fibre, carbon fiber, aramid fiber, alkali-resistant glass fibre, profound Military rock fiber, polypropylene fibre are one such or a variety of.Chopped mat is cut into required size according to design, and utilizes drilling Machine is drilled with the hole of suitable dimension in the two sides of connector, and fiber in ECC is facilitated to pass through, and enhances connector and interior siphonal lobe concrete Anchoring effect and sandwich sheet overall performance.
Further, the intermediate insulating layer uses rock wool board or foam heat-insulating board.
Further, the ECC concrete is formed by chopped strand and fine concrete mixing, and fine concrete is matched It include: 42.5 portland cement 442kg/m of P.O than material3, I grade of flyash 821kg/m3, 140-280 mesh quartz sand 455kg/ m3, water-reducing rate be 30% Sika high performance water reducing agent of polyocarboxy acid 9.7kg/m3, thickener 0.63kg/m3, tap water 354kg/ m3
Further, the chopped strand uses alcohol fibers, polyethylene fibre, carbon fiber, aramid fiber, alkaline-resisting glass Glass fiber, basalt fibre, polypropylene fibre are one such or a variety of, take the 0.2% of volume.
A kind of production method of the prefabricated sandwich heat-preserving wall based on board-like perforation type FRP connector, comprising the following steps:
1) fiber knitted net is cut;
2) FRP connector is located in template at design position by formwork using temporary fasteners;
3) make ECC concrete: by the siccatives such as P.O42.5 portland cement, I grade of flyash, quartz sand, thickener press than Example is poured into blender, and 2-3min is stirred;Then blender will be poured into added with the tap water of Sika high performance water reducing agent of polyocarboxy acid, Stir 6-8min;It is eventually adding chopped strand, is stirred for 2-3min;
4) the ECC concrete that 3-6mm is poured in template, is laid on ECC for the fiber knitted net cut after floating and mixes On solidifying soil;
5) the ECC concrete of 2-3mm is poured again, and is laid with intermediate insulating layer;
6) after laying intermediate insulating layer, the ECC concrete of one layer of 2-3mm is poured again on its surface, and be laid with the second layer Fiber knitted net;
7) the ECC concrete of one layer of 3-6mm is finally poured;
8) demoulding after 24 hours, maintenance to design strength.
It is further, soft to solve fiber knitted net after cutting fiber knitted net in the step 1), it is difficult to The problem of positioning, can carry out impregnation scab processing to fiber knitted net.
Further, in the step 5), intermediate insulating layer does coarse processing in laying front surface, to fill with concrete Tap touching, improves its interfacial adhesion effect.
The utility model has the advantages that a kind of prefabricated sandwich heat-preserving wall based on board-like perforation type FRP connector provided by the invention and Its production method mainly has following advantages compared with prior art:
1) connector in the present invention uses FRP connector, has the characteristics that intensity is high, thermal coefficient is low, can effectively subtract The heat transfer coefficient of small wall eliminates heat bridge effect, improves safety and the durability of wall.
2) the FRP connector used in the present invention uses " board-like " shape, increases connector and insulating layer, concrete layer Between contact area, and the marginal position in inside and outside layer concrete will be embedded in by the punching of required spacing, and be conducive to ectonexine ECC In fiber pass through connector hole and connector and preferably connect, improve interfacial bond property, improve anchoring effect.
3) combination for enhancing cement-base composite material (ECC) and fiber knitted net, enables structure to have from heavy and light, high-mechanic It the advantages that power, excellent toughness and good Crack Control ability, is especially impregnated and is carried out by epoxy resin in fiber knitted net After surface sticks sand, adhesive property between fibre bundle and ECC matrix be improved significantly, this is whole to sandwich structure is improved Deformation and mechanical property are all of great importance.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of FRP connector in the embodiment of the present invention;
Fig. 2 is the sectional view of the embodiment of the present invention;
Fig. 3 is the structural schematic diagram of the embodiment of the present invention;
It include: 1, FRP connector in figure, 1-1, hole, 2, ECC concrete, 3, fiber knitted net, 4, intermediate insulating layer, 5, temporary fasteners.
Specific embodiment
The present invention will be further explained with reference to the accompanying drawings and embodiments.
It is as shown in Figs. 1-3 a kind of prefabricated sandwich heat-preserving wall based on board-like perforation type FRP connector, including internal layer mixes Concrete board, outer concrete plate, intermediate insulating layer 4 and FRP connector 1;
Wherein, the internal layer concrete slab, outer concrete plate it is compound by fiber knitted net 3 and ECC concrete 2 and At realizing internal layer concrete slab, intermediate insulating layer 4, consolidating between outer concrete plate by the FRP connector 1 that laterally wears It connects, and FRP connector 1 is located at internal layer concrete slab, the both sides of the edge position in outer concrete plate opens up hole by spacing 1-1。
In the present embodiment, the fiber knitted net 3 is fine using carbon fiber, aramid fiber, alkali-resistant glass fibre, basalt One or both of dimension, vinal or polyethylene fibre are made into net by radial direction and broadwise.
The FRP connector 1 is the chopped mat for stacking the laminated material of 6 layers or so fiber compositions and being formed, with a thickness of 2.5-5mm, density 500g/m2, used fiber is alcohol fibers, polyethylene fibre, carbon fiber, aramid fiber, resistance to Alkali containing glass fibre, basalt fibre, polypropylene fibre are one such or a variety of.Chopped mat is cut into required ruler according to design It is very little, and it is drilled with the hole of suitable dimension in the two sides of connector using drilling machine, facilitate fiber in ECC to pass through, enhances connector And interior siphonal lobe concrete anchoring effect and sandwich sheet overall performance.
The intermediate insulating layer 4 uses rock wool board or foam heat-insulating board.
The ECC concrete 2 is formed by chopped strand and fine concrete mixing, and the proportion material packet of fine concrete It includes: 42.5 portland cement 442kg/m of P.O3, I grade of flyash 821kg/m3, 140-280 mesh quartz sand 455kg/m3, water-reducing rate For 30% Sika high performance water reducing agent of polyocarboxy acid 9.7kg/m3, thickener 0.63kg/m3, tap water 354kg/m3
The chopped strand is using alcohol fibers, polyethylene fibre, carbon fiber, aramid fiber, alkali-resistant glass fibre, profound Military rock fiber, polypropylene fibre are one such or a variety of, take the 0.2% of volume.
A kind of production method of the prefabricated sandwich heat-preserving wall based on board-like perforation type FRP connector, comprising the following steps:
1) fiber knitted net 3 is cut according to size needed for plate, it is soft to solve fiber knitted net, it is difficult to positioning Problem can carry out impregnation scab processing to fiber knitted net 3: epoxy resin, curing agent and diluent are mixed in proportion, After it is thoroughly mixed, manually it is equably brushed on the surface of web with brush, is glued before maceration extract is uncured Sand processing;
2) FRP connector 1 is located in template at design position by formwork using temporary fasteners 5;
3) it makes ECC concrete 2: the siccatives such as P.O42.5 portland cement, I grade of flyash, quartz sand, thickener is pressed Ratio is poured into blender, and 2-3min is stirred;Then stirring will be poured into added with the tap water of Sika high performance water reducing agent of polyocarboxy acid Machine stirs 6-8min;It is eventually adding chopped strand, is sprinkled into fiber uniformly as far as possible, avoids the occurrence of clustering phenomena, to chopped strand After being all added, it is stirred for 2-3min;
4) the ECC concrete 2 that 3-6mm is poured in template need to only use Small-scale Flat oscillator because ECC mobility is preferable Its jolt ramming is smoothed out, the fiber knitted net 3 cut is laid on ECC concrete 2;
5) the ECC concrete 2 of 2-3mm is poured again, and is laid with intermediate insulating layer 4, heat preservation plate surface does coarse processing, so as to It is come into full contact with concrete, improves its interfacial adhesion effect;
6) after laying intermediate insulating layer 4, the ECC concrete 2 of one layer of 2-3mm is poured again on its surface, and be laid with second Layer fiber knitted net 3;
7) the ECC concrete 2 of one layer of 3-6mm is finally poured;
8) demoulding after 24 hours, maintenance to design strength.
Wherein, the temporary fasteners 5, which mainly serve, is fixed temporarily, and wood may be selected according to the difference that test prepares material Item or aluminum strip, width are about 2-3cm, and need to respectively place one in the two sides of FRP connector, prevent connector run-off the straight.If It selects batten as temporary fasteners, then can be used air gun to squeeze into nail inside it, two sides batten is connected, to secure FRP Connector;If selecting aluminum strip as temporary fasteners, need to be punched before placing aluminum strip in its suitable position, fixed FRP connects When fitting, two lateral aluminum strips are connected using screw in hole location, to secure the position of connector.Temporary fasteners It is taken away before being laid with insulating layer.
When dismounting, nail or screw are unloaded using pliers, screwdriver, are careful not to be fallen into the concrete poured into In.And try not to encounter connector when removing, to prevent changing the position of connector.
The present invention makes full use of the higher corrosion resistance of board-like perforation type FRP connector, low thermal coefficient, can be effective The advantages of heat bridge effect for avoiding generic connectivity part from generating, solves the connector and sandwich of layers, coagulation pedosphere of conventional vacuum wall The problems such as face bonding and poor anchoring property, while the matrix that ECC is new as TRC, formed it is a kind of newly as sandwich structure Inside and outside impeller material.
The above is only a preferred embodiment of the present invention, it should be pointed out that: for the ordinary skill people of the art For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered It is considered as protection scope of the present invention.

Claims (9)

1. a kind of prefabricated sandwich heat-preserving wall based on board-like perforation type FRP connector, which is characterized in that including interior layer concrete Plate, outer concrete plate, intermediate insulating layer (4) and FRP connector (1);
Wherein, the internal layer concrete slab, outer concrete plate it is compound by fiber knitted net (3) and ECC concrete (2) and At realizing internal layer concrete slab, intermediate insulating layer (4), between outer concrete plate by the FRP connector (1) that laterally wears It is affixed, and FRP connector (1) is located at internal layer concrete slab, the both sides of the edge position in outer concrete plate is opened up by spacing Hole (1-1).
2. a kind of prefabricated sandwich heat-preserving wall based on board-like perforation type FRP connector according to claim 1, feature It is, the fiber knitted net (3) is fine using carbon fiber, aramid fiber, alkali-resistant glass fibre, basalt fibre, polyvinyl alcohol One or both of dimension or polyethylene fibre are made into net by radial direction and broadwise.
3. a kind of prefabricated sandwich heat-preserving wall based on board-like perforation type FRP connector according to claim 1, feature It is, the FRP connector (1) is that fiber stack is laminated the chopped mat to be formed, with a thickness of 2.5-5mm, density 500g/ m2, used fiber is alcohol fibers, polyethylene fibre, carbon fiber, aramid fiber, alkali-resistant glass fibre, basalt fibre Dimension, polypropylene fibre are one such or a variety of.
4. a kind of prefabricated sandwich heat-preserving wall based on board-like perforation type FRP connector according to claim 1, feature It is, the intermediate insulating layer (4) uses rock wool board or foam heat-insulating board.
5. a kind of prefabricated sandwich heat-preserving wall based on board-like perforation type FRP connector according to claim 1, feature It is, the ECC concrete (2) is formed by chopped strand and fine concrete mixing, and the proportion material packet of fine concrete It includes: P.O42.5 portland cement 442kg/m3, I grade of flyash 821kg/m3, 140-280 mesh quartz sand 455kg/m3, water-reducing rate For 30% Sika high performance water reducing agent of polyocarboxy acid 9.7kg/m3, thickener 0.63kg/m3, tap water 354kg/m3
6. a kind of prefabricated sandwich heat-preserving wall based on board-like perforation type FRP connector according to claim 5, feature It is, the chopped strand uses alcohol fibers, polyethylene fibre, carbon fiber, aramid fiber, alkali-resistant glass fibre, the Black Warrior Rock fiber, polypropylene fibre are one such or a variety of, take the 0.2% of volume.
7. a kind of production method of the prefabricated sandwich heat-preserving wall as described in claim 1 based on board-like perforation type FRP connector, Characterized by comprising the following steps:
1) fiber knitted net (3) are cut;
2) FRP connector (1) is located in template at design position by formwork using temporary fasteners (5);
3) make ECC concrete (2): by the siccatives such as P.O42.5 portland cement, I grade of flyash, quartz sand, thickener press than Example is poured into blender, and 2-3min is stirred;Then blender will be poured into added with the tap water of Sika high performance water reducing agent of polyocarboxy acid, Stir 6-8min;It is eventually adding chopped strand, is stirred for 2-3min;
4) the ECC concrete (2) that 3-6mm is poured in template, is laid on ECC for the fiber knitted net cut (3) after floating On concrete (2);
5) the ECC concrete (2) of 2-3mm is poured again, and is laid with intermediate insulating layer (4);
6) after laying intermediate insulating layer (4), the ECC concrete (2) of one layer of 2-3mm is poured again on its surface, and be laid with second Layer fiber knitted net (3);
7) the ECC concrete (2) of one layer of 3-6mm is finally poured;
8) demoulding after 24 hours, maintenance to design strength.
8. a kind of production of prefabricated sandwich heat-preserving wall based on board-like perforation type FRP connector according to claim 7 Method, which is characterized in that in the step 1), after cutting fiber knitted net (3), impregnation scab is carried out to fiber knitted net (3) Processing.
9. a kind of production of prefabricated sandwich heat-preserving wall based on board-like perforation type FRP connector according to claim 7 Method, which is characterized in that in the step 5), intermediate insulating layer (4) does coarse processing in laying front surface.
CN201910627347.1A 2019-07-12 2019-07-12 A kind of prefabricated sandwich heat-preserving wall and preparation method thereof based on board-like perforation type FRP connector Pending CN110344537A (en)

Priority Applications (1)

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CN111075103A (en) * 2019-12-10 2020-04-28 北京中建建筑设计院有限公司 Assembled building heat-insulation external wall panel and manufacturing method thereof
CN112012369A (en) * 2020-09-08 2020-12-01 哈尔滨工业大学 Prefabricated light sandwich wallboard
CN112031203A (en) * 2020-09-08 2020-12-04 哈尔滨工业大学 Prefabricated sandwich wallboard made of loose heat-insulating materials and manufacturing process of prefabricated sandwich wallboard
CN112549672A (en) * 2020-12-02 2021-03-26 湖南大学 Protection and heat preservation integrated composite wallboard and manufacturing method thereof

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CN103496865A (en) * 2013-09-16 2014-01-08 北京工业大学 Hybrid FRP (Fiber Reinforced Plastic) grid enhancedreinforced ECC (Engineered Cementitious Composite) and application thereof tostructure for reinforcing concrete structure
CN108867932A (en) * 2018-08-14 2018-11-23 中国建筑标准设计研究院有限公司 The connector and heat-preserving wall and its construction method of a kind of prefabricated sandwich heat-preserving wall

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CN103435308A (en) * 2013-08-13 2013-12-11 中国矿业大学 Composite board and manufacturing method thereof
CN103496865A (en) * 2013-09-16 2014-01-08 北京工业大学 Hybrid FRP (Fiber Reinforced Plastic) grid enhancedreinforced ECC (Engineered Cementitious Composite) and application thereof tostructure for reinforcing concrete structure
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CN111075103A (en) * 2019-12-10 2020-04-28 北京中建建筑设计院有限公司 Assembled building heat-insulation external wall panel and manufacturing method thereof
CN112012369A (en) * 2020-09-08 2020-12-01 哈尔滨工业大学 Prefabricated light sandwich wallboard
CN112031203A (en) * 2020-09-08 2020-12-04 哈尔滨工业大学 Prefabricated sandwich wallboard made of loose heat-insulating materials and manufacturing process of prefabricated sandwich wallboard
CN112012369B (en) * 2020-09-08 2021-11-23 哈尔滨工业大学 Prefabricated light sandwich wallboard
CN112549672A (en) * 2020-12-02 2021-03-26 湖南大学 Protection and heat preservation integrated composite wallboard and manufacturing method thereof

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Application publication date: 20191018