CN112832393A - Construction method of passive ultra-low energy consumption building exterior wall external thermal insulation system - Google Patents
Construction method of passive ultra-low energy consumption building exterior wall external thermal insulation system Download PDFInfo
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- 238000009413 insulation Methods 0.000 title claims abstract description 110
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- 239000011248 coating agent Substances 0.000 claims abstract description 18
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- 238000004873 anchoring Methods 0.000 claims abstract description 16
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
-
- 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
- E04B1/66—Sealings
- E04B1/68—Sealings of joints, e.g. expansion joints
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
- E04B1/68—Sealings of joints, e.g. expansion joints
- E04B1/6801—Fillings therefor
-
- 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
- E04B1/762—Exterior insulation of exterior walls
-
- 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
- E04B1/762—Exterior insulation of exterior walls
- E04B1/7625—Details of the adhesive connection of the insulation to the wall
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
- E04B1/78—Heat insulating elements
- E04B1/80—Heat insulating elements slab-shaped
- E04B1/803—Heat insulating elements slab-shaped with vacuum spaces included in the slab
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/24—Structural elements or technologies for improving thermal insulation
- Y02A30/242—Slab shaped vacuum insulation
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B80/00—Architectural or constructional elements improving the thermal performance of buildings
- Y02B80/10—Insulation, e.g. vacuum or aerogel insulation
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Acoustics & Sound (AREA)
- Building Environments (AREA)
Abstract
The invention provides a construction method of a passive ultra-low energy consumption building external wall external thermal insulation system, which specifically comprises the following steps: standing the stirred mortar; coating mortar on a wall surface, then uniformly pulling out the bonding mortar into a saw-tooth shape from bottom to top by using a saw-tooth-shaped trowel, and attaching the vacuum insulation panel on the strip-shaped mortar; polyurethane foaming and anchoring identification pieces are arranged between plate seams of the vacuum insulation plates; the external corner part is preferably reinforced by adopting a plastic corner protection strip/net; after an interfacial agent is sprayed on the surface of the vacuum insulation panel, coating heat-insulating mortar on the surface of the interfacial agent in a scraping mode, after the heat-insulating mortar is dried, uniformly coating first rendering mortar on the surface of the heat-insulating mortar, pressing an alkali-resistant glass fiber net into the rendering mortar and installing an anchor bolt; when the first plastering mortar is slightly dry and hard to touch, smearing a second plastering mortar; and (5) coating a finishing material. The construction method of the passive ultra-low energy consumption building external wall external thermal insulation system reduces the thickness of the building thermal insulation layer, applies the vacuum thermal insulation plate to the passive house, reduces the thickness, is airtight and has strong thermal insulation capability, and achieves the technical effect of ultra-low energy consumption.
Description
Technical Field
Relates to the technical field of building energy-saving and heat-insulating materials, in particular to a construction method of a passive ultra-low energy consumption building external wall external heat-insulating system.
Background
The ultra-low energy consumption building realizes indoor constant temperature, constant humidity, constant oxygen, constant cleanness and constant static comfortable environment by improving the heat preservation and heat insulation performance and air tightness of the building enclosure structure to the maximum extent and combining with a high-efficiency heat recovery fresh air system, simultaneously reduces the requirements of heating and air conditioning to the minimum, almost does not need air conditioner and heating, maintains the room temperature of the whole year at the optimum 18-24 ℃ of the human body, can save 95 percent of energy, greatly lightens the environmental load, and can better and more quickly realize the aim of coping with global climate change. One of the key technologies of the ultra-low energy consumption building is the efficient heat preservation of the enclosure structure.
After the rear-attached type thin-plastered external thermal insulation system for the external wall is introduced into China in 2003, many problems also occur in view of construction technology, quality of constructors, uncontrollable hidden positions and other factors, for example, because the prior art adopts a double-layer thermal insulation board external-attached anchor-attaching process, the effectiveness of an anchor-attaching is directly related to the safety quality of the building thermal insulation system, the prior art is a hidden project, is not easy to monitor, has large safety risk, and has the building quality problems of cracking, water seepage, falling off and the like of the external thermal insulation system. The design service life is generally 25 years and can not reach the same service life as the building. In addition, the design thickness of the low-energy-consumption building heat-insulating layer is generally one time of that of the traditional building heat-insulating layer, and if a rear-attached type thin-plastered external heat-insulating system is adopted, the external heat-insulating system has greater potential safety hazard.
Therefore, the scheme is researched for the technical problem of how to reduce the thickness of the building heat-insulating layer and realize ultralow energy consumption.
Disclosure of Invention
The invention aims to provide a construction method of a passive ultra-low energy consumption building external wall external thermal insulation system, which solves the problem of how to reduce the thickness of a building thermal insulation layer, and the application of a vacuum thermal insulation plate on a passive house has the advantages of reduced thickness, air impermeability, strong thermal insulation capability and ultra-low energy consumption.
A construction method of a passive ultra-low energy consumption building exterior wall external heat insulation system specifically comprises the following steps:
step S1: standing the stirred mortar for 10 minutes, wherein no other additives are added into the mortar;
step S2: coating mortar on a wall surface, then uniformly pulling out a saw-tooth shape from bottom to top from bonding mortar by using a saw-tooth-shaped trowel, controlling the thickness to be 3-5 mm, attaching a vacuum insulation panel on strip-shaped mortar, and slightly and uniformly extruding the vacuum insulation panel;
step S3: arranging an anchoring identification piece between plate seams of the vacuum insulation plate;
arranging high-efficiency heat-insulating materials between plate seams of the vacuum heat-insulating plate, and preferably adopting plastic corner protection strips/nets to reinforce the external corner parts;
step S4: after the vacuum insulation panel is bonded, coating an interface agent on the surface of the vacuum insulation panel by using a rolling brush, drying the interface agent, and bonding the vacuum insulation panel for 12 hours before the next procedure construction can be carried out;
after the interface agent is dried, coating heat-insulating mortar on the surface of the interface agent, wherein the thickness of the heat-insulating mortar is controlled to be 8-12 mm;
step S5: after the heat-insulating mortar is dried, uniformly coating a first layer of finishing mortar with the thickness of 2-3 mm on the surface, immediately pressing the alkali-resistant glass fiber net into the finishing mortar, preferably covering the alkali-resistant glass fiber net, ensuring that the contour is micro-visible, and flattening without wrinkles; meanwhile, an anchoring part is arranged on the outer side of the mesh cloth;
step S6: when the first coat mortar is slightly dry and hard to touch, a second coat mortar is coated, the thickness is 1 mm-2 mm, and the alkali-resistant glass fiber net is preferably completely covered;
step S7: carrying out construction of smearing facing materials;
step S8: and (5) checking and accepting operation.
In step S2, the method specifically includes the following steps:
step S21: the vacuum insulation panel is constructed along the horizontal line from bottom to top in the pasting sequence, the internal and external corners are firstly pasted, then the large wall surface is constructed, and the vertical joints of the vacuum insulation panel on the large wall surface are suitable for staggered joint construction;
step S22: the vacuum insulation plate is uniformly extruded during bonding, can be lightly knocked by a rubber hammer or lightly knocked and fixed by hands, and bonding mortar extruded from the periphery of the plate is timely cleaned;
step S23: when pasting the vacuum insulation panel, should check at any time levelly and smoothly, perpendicular and negative and positive angle side is just, to repairing of not meeting the requirement and make level, should stand 12 hours at least after the vacuum insulation panel construction finishes and just can carry out other operations to prevent that the vacuum insulation panel from removing, avoid influencing the bond strength of vacuum insulation panel and basic unit's wall body, simultaneously, before carrying out next process, should check whether the vacuum insulation panel pastes firmly, and not hard up vacuum insulation panel should take off and heavily glue.
In the step S2, the vacuum insulation panel and the base wall are adhered in a full-adhesion mode, and the thickness of the adhesive mortar is preferably controlled to be 3-5 mm;
when the design height exceeds 50 meters, a fixing mode of bonding and anchoring is adopted, the number of anchor bolts per square meter is not less than 4, the anchor bolts are used for positioning the anchor identification pieces, and the anchor identification pieces are pre-embedded in the middle positions of the vertical plate seams of the vacuum insulation plate.
In the step S9, the facing material is any one of paint, facing mortar and flexible face brick.
The allowable deviation of the flatness and the verticality of the vacuum insulation plate is less than or equal to 4 mm.
The vacuum insulation panel is externally provided with a high-strength composite gas barrier film, the outermost side of the composite gas barrier film is glass fiber cloth, the specification of the glass fiber cloth is 80-350g/m2, and a composite getter is arranged in the glass fiber cloth.
And S2, drilling holes at the positions of the anchor bolt markers according to design requirements, installing anchor bolts, strictly forbidding percussion drills to drill holes on the vacuum insulation panels, wherein the effective anchoring depth of the anchor bolts on the concrete wall is not less than 25mm, and the effective anchoring depth of the anchor bolts on the light wall is not less than 50 mm.
In the step S3, the efficient thermal insulation material is one or a combination of two or more of a foaming strip, aerogel or polyurethane foam.
The thermal conductivity of the vacuum insulation panel is lower than 0.005W/(m.K).
The invention achieves the following remarkable effects:
the vacuum insulation panel is applied to the passive house, so that the thickness of a building insulation layer is reduced, the wall body is airtight, the insulation capacity is strong, and the technical effect of ultralow energy consumption is realized.
Drawings
FIG. 1 is a structural diagram of an external thermal insulation system in an embodiment of the present invention.
FIG. 2 is a layout structure diagram of a vacuum insulation panel according to an embodiment of the present invention.
Wherein the reference numerals are: 1-a base layer wall body; 2-leveling layer; 3-bonding mortar; 4-vacuum insulation panels; 4-1, PVC corner protection; 5-an interfacial agent; 6-thermal insulation mortar; 7-coating adhesive cement; 8-facing material.
Detailed Description
In order to clearly illustrate the technical features of the present solution, the present solution is described below by way of specific embodiments.
A construction method of a passive ultra-low energy consumption building exterior wall external heat insulation system specifically comprises the following steps:
step S1: standing the stirred mortar for 10 minutes, wherein no other additives are added into the mortar;
step S2: coating mortar on a wall surface, then uniformly pulling out a saw-tooth shape from bottom to top from bonding mortar 3 by using a saw-tooth-shaped trowel, controlling the thickness to be 3-5 mm, attaching the vacuum insulation panel 4 to the strip-shaped mortar, and slightly and uniformly extruding the vacuum insulation panel 4;
step S3: an anchoring identification piece is arranged between the plate seams of the vacuum heat insulation plate 4;
arranging high-efficiency heat insulation materials between plate seams of the vacuum heat insulation plate 4, and preferably adopting plastic corner protection strips/nets to reinforce the external corner parts, for example adopting PVC corner protection 4-1;
step S4: after the vacuum insulation panel 4 is bonded, the surface of the vacuum insulation panel 4 is coated with an interface agent 5 by a rolling brush, and the next procedure construction can be carried out after the interface agent 5 is dried and the vacuum insulation panel 4 is bonded for 12 hours;
after the interface agent 5 is dried, coating thermal insulation mortar 6 on the surface of the interface agent 5, wherein the thickness of the thermal insulation mortar 6 is controlled to be 8-12 mm;
step S5: after the heat-insulating mortar 6 is dried, uniformly coating a first layer of finishing mortar 7 with the thickness of 2-3 mm on the surface, immediately pressing the alkali-resistant glass fiber net into the finishing mortar 7, and preferably covering the alkali-resistant glass fiber net and forming a micro outline without wrinkles; meanwhile, an anchoring part is arranged on the outer side of the mesh cloth;
step S6: when the first coat mortar 7 is slightly dry and hard to touch, a second coat mortar 7 with the thickness of 1-2 mm is coated, preferably to completely cover the alkali-resistant glass fiber net;
step S7: carrying out construction of smearing the facing material 8;
step S8: and (5) checking and accepting operation.
In step S2, the method specifically includes the following steps:
step S21: the vacuum heat-insulating plate 4 is constructed along the horizontal line from bottom to top in the pasting sequence, the internal and external corners are firstly pasted, then the large wall surface is constructed, and the vertical joints of the vacuum heat-insulating plate 4 on the large wall surface are suitable for staggered joint construction;
step S22: the vacuum heat-insulating plate 4 is uniformly extruded during bonding, can be lightly knocked by a rubber hammer or lightly knocked and fixed by hands, and the bonding mortar 3 extruded from the periphery of the plate is timely cleaned;
step S23: when pasting vacuum insulation panel 4, should inspect at any time and level, perpendicular and negative and positive angle side is just, to repairing that does not conform to the requirement and make level, should stand 12 hours at least after vacuum insulation panel 4 construction finishes and just can carry out other operations to prevent that vacuum insulation panel 4 from removing, avoid influencing the bonding strength of vacuum insulation panel 4 and basic unit's wall body 1, simultaneously, before carrying out next process, should inspect whether vacuum insulation panel 4 pastes firmly, and not hard up vacuum insulation panel 4 should take off and heavily glue.
In the step S2, the vacuum heat-insulating plate 4 and the base layer wall 1 are adhered in a full-adhesion mode, and the thickness of the adhesive mortar 3 is preferably controlled to be 3-5 mm;
when the design height exceeds 50 meters, a fixing mode of bonding and anchoring is adopted, the number of anchor bolts per square meter is not less than 4, the anchor bolts are used for positioning the anchor identification pieces, and the anchor identification pieces are pre-embedded in the middle positions of the vertical plate seams of the vacuum insulation panels 4.
In step S9, the facing material 8 is any one of paint, facing mortar, and flexible face brick.
The flatness and verticality allowable deviation of the vacuum heat-insulating plate 4 is less than or equal to 4 mm.
The outside of the vacuum heat insulation plate 4 adopts a high-strength composite gas barrier film, the outermost side of the composite gas barrier film is glass fiber cloth, the specification of the glass fiber cloth is 80-350g/m2, and a composite getter is arranged in the glass fiber cloth.
And step S2, drilling holes at the positions of the anchor bolt markers according to design requirements, installing anchor bolts, strictly forbidding percussion drills to drill holes on the vacuum insulation panels 4, wherein the effective anchoring depth of the anchor bolts on the concrete wall is not less than 25mm, and the effective anchoring depth of the anchor bolts on the light wall is not less than 50 mm.
In step S3, the high-efficiency thermal insulation material is one or a combination of two or more of a foam strip, aerogel or polyurethane foam.
The thermal conductivity of the vacuum insulation panel 4 is lower than 0.005W/(m.K).
Preparation before construction operation:
(1) the leveling layer 22 of the base layer wall body 1 is required to be flat and not smooth, the strength requirement of the vacuum heat insulation plate 4 on the plastering base surface is met (under the normal maintenance condition, the maintenance time is not less than 14 days), the plastering layer needs to pass the supervision and the handing-over inspection of the organization of a construction unit, and the written handing-over procedure is implemented;
(2) the leveling layer 22 of the base wall 1 is required to be smooth and not glazed, the strength requirement of the vacuum heat-insulating plate 4 on a plastering base surface is met, and steel wire mesh strips are hung at the structural boundaries to perform anti-cracking strengthening treatment; and (4) checking: checking the base layer wall surface by using a guiding rule with the length of not less than 2m, wherein the flatness allowable deviation is less than or equal to 4mm, and the plastering layer needs to pass the handover check of supervision and organization of construction units and fulfill the written handover procedure;
(3) for the existing building reconstruction engineering, when the original wall surface is a coating facing, the coating is required to be cleaned, the concrete or cement mortar base layer is exposed, the vacuum insulation panel 4 can be pasted after the interface mortar (interface agent 5) treatment is carried out on the base layer, and the pasting is carried out according to the relevant regulations of the existing residential building energy-saving reconstruction technical regulation JGJ/T129 and the public building energy-saving reconstruction technical regulation JGJ 176;
(4) steel bar heads, wall tie bars and wall-penetrating steel pipe frames on the wall surface are thoroughly removed before construction, the repaired opening is strictly higher than the plastering large surface of the wall body, and construction can be carried out after the first party and the supervision acceptance are qualified;
(5) before construction, all doors, window frames, house entrance pipelines, downpipe supports and embedded parts are installed, strong and weak current threading work is completed, finished product protection is required to be carried out on the installed doors, windows, pipelines and the like, damage or pollution in the construction of exterior wall heat insulation engineering is avoided, and sealing and waterproof treatment is required to be carried out on the closing parts of heat insulation systems such as door and window openings, pipeline wall-penetrating openings, plinths, balconies, deformation joints, parapets and the like;
(6) during construction of the vacuum heat insulation plate 4 building heat insulation project and within 24 hours after completion, the temperature of a base layer and ambient air should not be lower than 5 ℃, sunshine exposure should be avoided in summer, wind power is higher than 5 grade, construction cannot be carried out in rainy days, and finished product protection should be carried out after the vacuum heat insulation plate 4 building heat insulation project is completed;
(7) materials used by the vacuum insulation panel 4 building insulation system are stored in a warehouse in a uniformly classified manner, stacked in order, marked and managed by a specially-assigned person;
(8) the vacuum heat-insulating plate 4 cannot be damaged in each construction link, the spot cutting cannot be carried out, and the special-shaped plate is customized by a factory;
(9) the varieties, specifications and performance indexes of various raw materials used for the engineering construction of the vacuum insulation panel 4 building insulation system must meet the requirements of design and related national and industrial standards and technical guidelines. The appearance and package of the material after entering the field are complete and have no damage, and the ready-mixed mortar is single-component finished mortar. The quality of the raw materials after entering the field is checked and accepted according to the regulations of national standard GB 50411 of construction quality acceptance Specification for building energy-saving engineering.
The technical features of the present invention which are not described in the above embodiments may be implemented by or using the prior art, and are not described herein again, of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and variations, modifications, additions or substitutions which may be made by those skilled in the art within the spirit and scope of the present invention should also fall within the protection scope of the present invention.
Claims (9)
1. A construction method of a passive ultra-low energy consumption building external thermal insulation system is characterized by comprising the following steps:
step S1: standing the stirred mortar for 1-60 minutes, wherein no other additives are added into the mortar;
step S2: coating mortar on a wall surface, then uniformly pulling out a saw-tooth shape from bottom to top from bonding mortar by using a saw-tooth-shaped trowel, controlling the thickness to be 3-5 mm, attaching a vacuum insulation panel on strip-shaped mortar, and slightly and uniformly extruding the vacuum insulation panel;
step S3: arranging an anchoring identification piece between plate seams of the vacuum insulation plate;
arranging high-efficiency heat-insulating materials between plate seams of the vacuum heat-insulating plate, and preferably adopting plastic corner protection strips/nets to reinforce the external corner parts;
step S4: after the vacuum insulation panel is bonded, coating an interface agent on the surface of the vacuum insulation panel by using a rolling brush, drying the interface agent, and bonding the vacuum insulation panel for 12 hours before the next procedure construction can be carried out;
after the interface agent is dried, coating heat-insulating mortar on the surface of the interface agent, wherein the thickness of the heat-insulating mortar is controlled to be 8-12 mm;
step S5: after the heat-insulating mortar is dried, uniformly coating a first layer of finishing mortar with the thickness of 2-3 mm on the surface, immediately pressing the alkali-resistant glass fiber net into the finishing mortar, preferably covering the alkali-resistant glass fiber net, ensuring that the contour is micro-visible, and flattening without wrinkles; meanwhile, an anchoring part is arranged on the outer side of the mesh cloth;
step S6: when the first coat mortar is slightly dry and hard to touch, a second coat mortar is coated, the thickness is 1 mm-2 mm, and the alkali-resistant glass fiber net is preferably completely covered;
step S7: carrying out construction of smearing facing materials;
step S8: and (5) checking and accepting operation.
2. The construction method of the passive ultra-low energy consumption building external thermal insulation system according to claim 1, wherein the step S2 specifically comprises the following steps:
step S21: the vacuum insulation panel is constructed along the horizontal line from bottom to top in the pasting sequence, the internal and external corners are firstly pasted, then the large wall surface is constructed, and the vertical joints of the vacuum insulation panel on the large wall surface are suitable for staggered joint construction;
step S22: the vacuum insulation plate is uniformly extruded during bonding, can be lightly knocked by a rubber hammer or lightly knocked and fixed by hands, and bonding mortar extruded from the periphery of the plate is timely cleaned;
step S23: when pasting the vacuum insulation panel, should check at any time levelly and smoothly, perpendicular and negative and positive angle side is just, to repairing of not meeting the requirement and make level, should stand 12 hours at least after the vacuum insulation panel construction finishes and just can carry out other operations to prevent that the vacuum insulation panel from removing, avoid influencing the bond strength of vacuum insulation panel and basic unit's wall body, simultaneously, before carrying out next process, should check whether the vacuum insulation panel pastes firmly, and not hard up vacuum insulation panel should take off and heavily glue.
3. The construction method of the passive ultra-low energy consumption building exterior wall external thermal insulation system according to claim 2, wherein in the step S2, the vacuum insulation panels and the base layer wall body are adhered in a full adhesion manner, and the thickness of the adhesive mortar is preferably controlled to be 3 mm-5 mm;
when the design height exceeds 50 meters, a fixing mode of bonding and anchoring is adopted, the number of anchor bolts per square meter is not less than 4, the anchor bolts are used for positioning the anchor identification pieces, and the anchor identification pieces are pre-embedded in the middle positions of the vertical plate seams of the vacuum insulation plate.
4. The construction method of the passive ultra-low energy consumption building exterior wall thermal insulation system according to claim 3, wherein in the step S9, the finishing material is any one of paint, finishing mortar and flexible face brick.
5. The construction method of the passive ultra-low energy consumption building external wall external thermal insulation system according to claim 4, wherein the allowable deviation of flatness and verticality of the vacuum insulation plate is less than or equal to 4 mm.
6. The construction method of the passive ultra-low energy consumption building exterior wall external thermal insulation system according to claim 5, wherein a high-strength composite gas barrier film is adopted outside the vacuum insulation panel, the outer side of the composite gas barrier film is glass fiber cloth, and the specification of the glass fiber cloth is 80-350g/m2And a composite getter is arranged in the cavity.
7. The construction method of the passive ultra-low energy consumption building external thermal insulation system according to claim 3, wherein in step S2, holes are drilled in the positions of anchor bolt markers according to design requirements, anchor bolts are installed, percussion drills are strictly forbidden to drill holes in the vacuum insulation panels, the anchor bolts have an effective anchoring depth of not less than 25mm in the concrete wall body, and the anchor bolts have an effective anchoring depth of not less than 50mm in the light wall body.
8. The construction method of the passive ultra-low energy consumption building exterior wall thermal insulation system according to claim 1, wherein in the step S3, the high efficiency thermal insulation material is one or a combination of two or more of a foaming strip, aerogel or polyurethane foam.
9. The construction method of the passive ultra-low energy consumption building exterior wall external thermal insulation system according to claim 1, wherein the thermal conductivity of the vacuum insulation panels is lower than 0.005W/(m.K).
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Application publication date: 20210525 |