A method for constructing indoor fully-adhered airtight membrane in a prefabricated passive house

Abstract

The present invention belongs to the technical field of airtight film construction methods, and specifically relates to a method for fully sticking airtight film indoors in an assembled passive house, comprising the following steps: S1, processing of cavities and gaps of corrugated steel plates: injecting foaming fillers into the cavities of corrugated steel plates; S2, base layer processing: processing the base layer of the corrugated steel plates and the base layer of lightweight wall surfaces; S3, processing of the interface between the corrugated steel plates and the wall: the interface between the corrugated steel plates and the wall is tightly filled with fireproof cotton; the inner corners of the interface between the corrugated steel plates and the wall are pasted with inner corner strips; S4, pasting of airtight film: the wall and the bottom of the corrugated steel plates are fully paved with airtight film, and the paving range of the corrugated steel plates extends out of the wall surface by not less than 1000mm; the paving is from bottom to top; S5, closing of the corrugated steel plates with airtight film: the closing of the corrugated steel plates is closed with buckle strips. The junction between the corrugated steel plate and the wall is tightly filled with fireproof cotton; an airtight film is fixed to the wall and the bottom of the corrugated steel plate, so that the airtight film is fully paved, thereby meeting the airtightness requirements.

Description

Technical Field

[0001] The invention belongs to the technical field of airtight membrane construction methods, and in particular relates to a method for constructing an indoor fully-adhered airtight membrane in an assembled passive room. Background Art

[0002] It is very difficult for prefabricated passive house projects to meet ultra-low energy consumption building standards, not to mention meeting near-zero energy consumption building standards.

[0003] Ultra-low energy consumption (near zero energy consumption) buildings have very high requirements for the air tightness of the building's exterior walls. Prefabricated passive houses, especially steel structure building floor plates, are mostly made of corrugated steel plates. In addition to the heat conduction of the steel plates themselves, the unique cavities and gaps in the shape of the steel plates cause problems such as laxity and air leakage when laying airtight membranes at the intersections with the walls. How to paste them tightly and seal them tightly is a difficult problem that needs to be solved urgently today. In addition, there are many gaps in the exterior walls of prefabricated buildings, which also puts higher requirements on meeting the air tightness requirements of passive houses.

[0004] The inner side of the exterior wall of prefabricated buildings is mostly made of lightweight aggregate walls, which require special treatment; the corners and the top and the corrugated steel plate also need to be treated. These are the difficulties of film pasting at this stage. If not handled properly, the airtight film is very easy to fall off, causing the passive house to fail to meet the energy-saving and environmental protection requirements. In addition, during the interior decoration stage, nailing on the wall may occur, destroying the airtight layer, which is also one of the problems that need to be solved. Therefore, the laying of airtight film for prefabricated passive house buildings is both the focus and the difficulty of creating ultra-low energy consumption (near zero energy consumption) buildings.

[0005] At present, airtight film laying mainly involves sticking airtight tape on windows and individual gaps. There is no standard practice for prefabricated buildings, and an efficient airtight film laying method is urgently needed to solve the above problems. Summary of the invention

[0006] In view of the above technical problems, the present invention provides a method for constructing fully-adhered airtight membranes in assembled passive houses, which can achieve full-surface paving of airtight membranes on the inner side of exterior walls and corrugated steel plates of steel structures to meet the requirements of airtightness.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0008] A method for constructing an indoor fully-bonded airtight membrane in an assembled passive house comprises the following steps:

[0009] S1. Treatment of the cavity and gap of the corrugated steel sheet: inject foam filler into the cavity of the corrugated steel sheet, let it expand inside and fill the entire protruding cavity; seal the gap of the corrugated steel sheet with sealant;

[0010] S2. Base treatment: Treat the corrugated steel plate base and lightweight wall base;

[0011] S3. Interface treatment between profiled steel plate and wall: The interface between profiled steel plate and wall is tightly filled with fireproof cotton; the inner corner strip is pasted on the inner corner between profiled steel plate and wall;

[0012] S4. Pasting of airtight film: The wall and the bottom of the corrugated steel plate are fully covered with airtight film, and the paving range of the corrugated steel plate extends not less than 1000mm from the wall surface; the paving is carried out from bottom to top, one by one, and the adhesive is scraped evenly and fully with a scraper, and the longitudinal seams are overlapped; after the adhesive is dry, the seams are pasted and sealed again with airtight tape;

[0013] S5. Closing of airtight membrane corrugated steel plate: Use buckle strips to seal the closing of the corrugated steel plate.

[0014] In S1: the cavity of the corrugated steel sheet is cleaned, and then the foaming filler is injected, and the injection is carried out layer by layer from the outside to the inside. After the first stage is expanded and foamed, the next stage of injection is started, and the foaming filler is allowed to expand and fill the inside to be full and dense, and gradually fill the entire protruding cavity, and more than 1000mm along the wall toward the indoor direction.

[0015] In S1: after the cavity is sealed, the foam filler overflowing from the gap of the cavity is cleaned up; then a sealant is applied with a glue gun to seal the cavity, and the surface is flush with the steel plate.

[0016] In S2, the base treatment of the corrugated steel sheet means that the corrugated steel sheet is cleaned and there should not be any protrusions. If there are protrusions, they must be polished and cleaned;

[0017] The treatment of the base layer of the lightweight wall means that the protruding points on it are polished and smoothed. The surface of the lightweight wall must be cured with an interface agent, and the interface agent is rolled on the wall surface with a roller to ensure that the surface is rolled in place and smooth;

[0018] Clean the stains on the ground surface near the wall, make a water overflow slope at the junction of the lightweight wall and the ground to prevent right angles, and polish the surface.

[0019] In S3: a metal arc-shaped internal corner strip is pasted on the internal corner where the corrugated steel plate meets the wall, and is fixed with long nails and glue. The bonding is required to be firm to prevent loosening and hollowing of the airtight membrane.

[0020] In S4: the airtight membrane is fully bonded and spread vertically; the upper part of the horizontal overlap of the airtight membrane is placed outside the range of 500mm from the wall to the corrugated steel plate, and the lower part is outside the range of 500mm above the upper flip beam to prevent hollowing near the corners and ensure firm overall bonding.

[0021] In said S4: when pasting, pre-laying is first performed; the airtight film is cut according to the wall height, the laying range of the corrugated steel plate and the ground pasting range size, preferably a whole piece. If the whole piece cannot be satisfied, it is cut according to the overlapping position, but the overlapping positions of two adjacent membranes should be staggered.

[0022] In S4: During the decoration stage, if nails are driven into the wall, the nails must be equipped with sealing pads to prevent the membrane from opening.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The junction between the corrugated steel sheet and the wall is tightly filled with fireproof cotton; the wall and the bottom of the corrugated steel sheet are fixed with airtight membrane, which realizes the full surface paving of the airtight membrane, thereby meeting the airtightness requirements. At the same time, a closing component is provided at the end of the corrugated steel sheet to realize the closing treatment of the corrugated steel sheet.

[0025] The paving range of the corrugated steel sheet extends out of the wall by no less than 1000mm; the upper part of the horizontal airtight membrane is placed outside the range of the corrugated steel sheet (500mm) on the wall, and the lower part is outside the range of 500mm above the upper beam. It is paved by pressing from top to bottom, and the joints are sealed with special adhesive strips; in steel structure passive house buildings, airtight membrane is fully paved to ensure the airtight effect. At the same time, the corrugated steel sheet is first filled with gaps. Considering the possibility of loose filling and conduction of cold and hot bridges, the upper part is paved 1000mm, which plays a role in overall firm bonding and blocking cold and hot bridges. The purpose of being outside the range of 500mm from the corrugated steel sheet and the lower part being outside the range of 500mm above the upper beam is to facilitate the lap joint method, prevent hollowing near the corners, and ensure overall firm bonding.

[0026] In addition to being airtight, the above structural setting also prevents the airtight membrane from being damaged by nails during later decoration. Since full adhesion is adopted, the possibility of damage to the overall airtight layer is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The present invention is a schematic diagram of the present invention;

[0028] Figure 2 yes Figure 1 A partial enlarged view of the middle A;

[0029] Figure 3 It is a structural schematic diagram of the lower surface of the corrugated steel plate of the present invention;

[0030] Figure 4 It is a structural schematic diagram of a corrugated steel plate of the present invention;

[0031] Among them: 1 is a lightweight wall, 2 is a corrugated steel plate concrete floor, 3 is a corrugated steel plate, 30 is a cavity, 4 is an airtight membrane, 5 is an internal angle strip, 6 is a buckle strip, 7 is a rubber strip, 8 is a screw, 9 is a tape, 10 is a sealant, and 11 is a fireproof cotton. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] like Figures 1 to 4 As shown, a method for constructing an indoor fully bonded airtight membrane in an assembled passive house comprises the following steps:

[0034] S1. Treatment of cavity and gap of corrugated steel sheet

[0035] In order to increase the bearing capacity and reduce its own weight, the corrugated steel sheet has a cavity, which must be filled to prevent the formation of cold and hot bridges in such parts.

[0036] Further, the method specifically includes the following steps:

[0037] (1) Cavity cleaning: Use a blower connected to a plastic pipe to extend into the cavity to blow away the floating dust in the cavity of the corrugated steel plate.

[0038] (2) Injecting expanding rigid foaming agent into the cavity of the corrugated steel sheet

[0039] Inject expanding rigid foaming agent fillers (such as polyurethane rigid foam) into the inside of the protruding point (hollow part) along the gap of the protruding point at the bottom of the corrugated steel plate, and inject them layer by layer from the outside to the inside. After 1-3 seconds of injection, wait for the first section to expand and foam, and then start the next section of injection. Each time interval is more than 2 minutes (expansion foaming), allowing it to expand and fill the inside fully and densely, and gradually fill the entire protruding cavity, more than 1000mm along the wall toward the room, and ensure that the air flow inside and outside the partition is cut off by blocking a distance of more than 1000mm.

[0040] (3) Gap sealing

[0041] After the cavity is sealed, clean up the polyurethane foam glue overflowing from the cavity gap. Use a cloth to wipe it before hardening. If it has hardened, use a scraper or blade to scrape it clean. Then use a glue gun to apply sealant to seal it. Make sure the surface is level with the steel plate and it is flat. Wait one day before proceeding to the next step of construction.

[0042] S2. Base treatment

[0043] (1) Corrugated steel plate base treatment

[0044] The top corrugated steel plate must be cleaned and free of any protrusions. If there are protrusions, they must be polished and cleaned before the next step of construction can begin. The part where the corrugated steel plate is injected with foam fillers must be cleaned of any spills to ensure that it is clean and pollution-free.

[0045] (2) Lightweight wall (ALC board) base treatment

[0046] The light wall (ALC board) must be cleaned, the protruding points must be polished and smoothed, the surface of the light wall (ALC board) must be cured with an interface agent, and the interface agent must be rolled on the wall surface with a roller to ensure that the surface is rolled in place and smooth. Be careful not to contaminate the top corrugated steel plate (the corrugated steel plate is protected by a temporary film, which is then torn off).

[0047] (3) Floor treatment

[0048] Clean the stains on the ground surface near the wall, use C30 fine stone concrete to make the flashing slope at the junction of the ALC board and the ground to prevent right angles, and the surface should be polished.

[0049] S3. Interface treatment between corrugated steel sheet and wall

[0050] (1) Gap sealing

[0051] The junction between the corrugated steel plate and the wall is tightly filled with fireproof cotton; specifically: use a putty knife to stuff the fireproof cotton into the gap, making sure it is tightly blocked.

[0052] (2) Treatment of internal corners

[0053] The internal corner strips are pasted on the internal corners where the corrugated steel sheet and the wall meet. Metal arc internal corner strips (50mm×50mm) are preferred. They are fixed by long nails + glue. The bonding is required to be firm to prevent loosening and cause hollowing of the airtight membrane. (Expansion screws and expansion plugs can be used for the wall, and nails can be used for the corrugated steel sheet).

[0054] S4, airtight film pasting

[0055] (1) Requirements for airtight film pasting

[0056] To ensure the airtightness of the building, an airtight film is pasted on the inside of the exterior wall. The airtight film is fully pasted and laid vertically. The wall and the bottom of the corrugated steel plate are fully covered with airtight film, and the corrugated steel plate paving range extends out of the wall surface by no less than 1000mm, covering the entire part within the grouting range.

[0057] The upper part of the horizontal lap joint of the airtight membrane is placed 500mm away from the corrugated steel plate on the wall, and the lower part is 500mm above the upper beam to prevent hollowing near the corners and ensure firm overall bonding.

[0058] In steel structure passive house buildings, airtight membrane is fully paved to ensure airtightness. At the same time, the corrugated steel sheet is first used to fill the gap. Considering the possibility of loose filling and hot and cold bridge conduction, the upper part is paved 1000mm to ensure overall firm bonding and block the hot and cold bridge. The purpose of the lower part being 500mm away from the corrugated steel sheet and 500mm above the upper beam is to facilitate the overlap and prevent hollowing near the corners, so that the overall bonding is firm.

[0059] (2) Cutting and pre-laying of airtight film

[0060] When pasting, pre-laying is done first. Cut the airtight film according to the wall height, the laying range of the corrugated steel plate and the ground pasting range. It is best to cut it in a whole piece. If it cannot meet the whole piece, cut it according to the overlapping position, but the overlapping positions of two adjacent films should be staggered (one adjacent piece is a whole piece, and one piece can be overlapped). When pre-laying, each piece of airtight film only needs to ensure the accurate size and position, especially the length must meet the requirements, otherwise it will affect the sealing and fixation.

[0061] (3) Airtight film pasting

[0062] When pasting each piece of airtight film, first use a scraper to scrape the adhesive evenly and fully from top to bottom, then paste the airtight film from bottom to top, and use the scraper to scrape the surface of the airtight film to evenly apply the adhesive under the film, while expelling the gas under the film, and then flatten and firmly stick the airtight film, and also stick the top firmly.

[0063] When laying the next layer, overlap the longitudinal seam of the previous layer of airtight membrane by 5cm and compact it to make it level.

[0064] After the adhesive dries, use airtight tape to seal the seams again.

[0065] The horizontal overlap is pasted by pressing down from above, and the joint is sealed again with special adhesive strips.

[0066] Note: The paste must be fully adhered to prevent nails from piercing the airtight film during later decoration and causing leakage around the nail openings.

[0067] During the decoration stage, if nails are driven into the wall, sealing pads must be added to the nails to prevent the membrane from opening.

[0068] S5, airtight membrane corrugated steel plate closing

[0069] In order to prevent the airtight membrane from opening or spreading at the end of the corrugated steel plate, the end is sealed with an aluminum buckle strip and a rubber strip, and tightened with screws (at intervals of 500mm, with a sealing pad on the inside).

[0070] Only the preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention, and various changes should be included in the protection scope of the present invention.

Claims

1. A method for constructing a fully bonded airtight membrane in an assembled passive house, characterized in that: The following steps are involved: S1. Treatment of the cavity and gap of the corrugated steel sheet: inject foam filler into the cavity of the corrugated steel sheet, let it expand inside and fill the entire protruding cavity; seal the gap of the corrugated steel sheet with sealant; S2, base treatment: the base of the corrugated steel plate and the base of the lightweight wall are treated; in S2, the base treatment of the corrugated steel plate means that the corrugated steel plate is cleaned and there should be no protrusions. If there are protrusions, they must be polished and cleaned; The treatment of the base layer of the lightweight wall means that the protruding points on it are polished and smoothed. The surface of the lightweight wall must be cured with an interface agent, and the interface agent is rolled on the wall surface with a roller to ensure that the surface is rolled in place and smooth; Clean the stains on the ground surface near the wall, make a flashing slope at the junction of the lightweight wall and the ground to prevent right angles, and the surface should be pressed S3. Interface treatment between profiled steel plate and wall: The interface between profiled steel plate and wall is tightly filled with fireproof cotton; the inner corner strip is pasted on the inner corner between profiled steel plate and wall; In S3: a metal arc-shaped internal corner strip is pasted on the internal corner where the corrugated steel plate and the wall meet, and is fixed with long nails and glue, and is required to be firmly bonded to prevent loosening and hollowing of the airtight membrane; S4, airtight film pasting: the wall and the bottom of the corrugated steel plate are fully covered with airtight film, and the corrugated steel plate paving range extends out of the wall surface by no less than 1000mm; in S4: the airtight film is fully pasted and pasted vertically; the upper part of the horizontal overlap of the airtight film is placed outside the range of 500mm from the corrugated steel plate on the wall, and the lower part is outside the range of 500mm above the upper beam to prevent hollowing near the corner, and the overall bonding is firm; the paving is carried out from bottom to top, one by one, and the adhesive is scraped evenly and fully with a scraper, and the longitudinal seams are overlapped; after the adhesive is dry, the joints are pasted and sealed again with airtight tape; S5. Closing of airtight membrane corrugated steel plate: Use buckle strips to seal the closing of the corrugated steel plate.

2. A method for constructing an indoor fully bonded airtight membrane in an assembled passive house according to claim 1, characterized in that: In S1: the cavity of the corrugated steel sheet is cleaned, and then the foaming filler is injected, and the injection is carried out layer by layer from the outside to the inside. After the first stage is expanded and foamed, the next stage of injection is started, and the foaming filler is allowed to expand and fill the inside to be full and dense, and gradually fill the entire protruding cavity, and more than 1000mm along the wall toward the indoor direction.

3. A method for constructing an indoor fully bonded airtight membrane in an assembled passive house according to claim 1, characterized in that: In S1: after the cavity is sealed, the foam filler overflowing from the gap of the cavity is cleaned up; then a sealant is applied with a glue gun to seal the cavity, and the surface is flush with the steel plate.

4. The method for constructing a fully bonded airtight membrane in an assembled passive house according to claim 1, characterized in that: In said S4: when pasting, pre-laying is first performed; the airtight film is cut according to the wall height, the laying range of the corrugated steel plate and the ground pasting range. If the whole film cannot be satisfied, it is cut according to the overlapping position, but the overlapping positions of two adjacent films should be staggered.

5. The method for constructing a fully bonded airtight membrane in an assembled passive house according to claim 1, characterized in that: In S4: During the decoration stage, if nails are driven into the wall, the nails must be equipped with sealing pads to prevent the membrane from opening.

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