Passive house outer curtain wall heat preservation structure

Abstract

The utility model discloses a passive house outer curtain wall thermal insulation structure, which belongs to the technical field of building construction, and adopts the technical scheme that the passive house outer curtain wall thermal insulation structure comprises a thermal insulation layer I and a thermal insulation layer II which are formed by a plurality of rock wool strips, vertical seams between the thermal insulation layer I and the thermal insulation layer II are staggered line by line, and the staggered size is not less than 200mm; the first heat preservation layer and the surface of the wall base layer are fixed through bonding, and the first heat preservation layer and the second heat preservation layer are fixed through bonding. Reinforcing alkali-resisting gridding cloth is laid on the outer portion of the second heat preservation layer and fixed through a mortar protection layer. The rock wool board has the advantages that secondary processing is carried out on the rock wool board by analyzing the structural performance of the thermal insulation material and utilizing the characteristic that the transverse wires are high in drawing strength, so that fibers in rock wool strips are perpendicular to the wall face of the outer wall, the tension bonding strength between the thermal insulation material and the outer wall is improved, and the risk that the thermal insulation material falls off is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of building construction, and particularly relates to a construction method for a passive house outer curtain wall thermal insulation structure. Background Art

[0002] The rock wool board thin plastering exterior wall insulation system is a common exterior wall insulation method, which is characterized by using rock wool board as insulation material and performing thin plastering on its surface to form an exterior wall insulation system. The connection and fixation of the rock wool board exterior insulation system to the base wall generally adopts mechanical anchoring as the main method and bonding as the auxiliary method. Due to the heavy weight of the rock wool board, it is easy to fall off after a long period of use. Therefore, the present application provides a passive house exterior curtain wall insulation structure. Utility Model Content

[0003] The utility model aims to provide a passive house exterior curtain wall insulation structure.

[0004] The utility model is realized by the following measures: a passive house exterior curtain wall insulation structure, characterized in that it comprises an insulation layer 1 and an insulation layer 2 composed of a plurality of rock wool strips, the vertical seams between the insulation layer 1 and the insulation layer 2 should be staggered row by row, and the staggered size should not be less than 200mm;

[0005] The insulation layer 1 and the surface of the wall base layer, and the insulation layer 1 and the insulation layer 2 are fixed by bonding;

[0006] A reinforced alkali-resistant mesh cloth is laid on the outside of the second thermal insulation layer, and the reinforced alkali-resistant mesh cloth is fixed by a mortar protective layer.

[0007] It also includes an anchoring piece whose outer end is fixed in the mortar protective layer and whose inner end is anchored in the wall.

[0008] The outer surfaces of the rock wool strips are coated with an interface agent.

[0009] A support plate is fixedly arranged on the wall and between each floor, and the distance between two adjacent support plates on the same floor is no more than 1200 mm.

[0010] The effective bonding area ratio between the thermal insulation layer 1 and the surface of the wall base layer should not be less than 70%.

[0011] The gap between adjacent rock wool strips is within 1.5mm.

[0012] The direction of the fiber layer in the rock wool strip is perpendicular to the wall base.

[0013] The size of the rock wool strip is generally determined according to actual conditions. The width is generally 10 cm to 60 cm, the thickness is generally 2 cm to 10 cm, and the length is generally about 100-200 cm, preferably 100-120 cm.

[0014] A construction method for a passive house exterior curtain wall insulation structure, characterized by comprising:

[0015] Wall base treatment: Check and accept the base to see if its flatness and lines are straight and clear. The base surface should be flat and dry (cement mortar surface should be maintained for more than 14 days), free of floating dust, asphalt and other stains, with a PH value of less than 10 and a moisture content of less than 10%. If the base is uneven, cement mortar should be used as a leveling layer with a thickness of no more than 20mm.

[0016] Apply two coats of interface agent to the rock wool strips; Applying two coats of interface agent to the rock wool strips can increase the strength and rigidity of the rock wool board, making it more solid and stable, and can also play a role in waterproofing and moisture-proofing, extending the service life. The interface agent can be pasted only after it is dry; before painting, it is necessary to check the rock wool strip certificate and performance test report; conduct on-site inspections of specifications, dimensions and bulk density, and archive the on-site acceptance records.

[0017] In addition, the testing of rock wool strips specifically includes:

[0018] The performance and structural form of exterior wall insulation materials are studied. Through experiments and retrieval of the company's previous project data, through comparison and model simulation, the types of exterior wall insulation materials and structural forms that meet the requirements are selected in comparison with the requirements of passive house exterior wall insulation structures. For the exterior wall insulation materials and structures that meet the requirements, their suitable installation and construction processes are selected, and tensile bonding field tests are carried out. According to relevant standards and specifications, insulation materials, structures and construction processes that meet the requirements are selected for evaluation. The insulation materials, structures and construction processes that meet the requirements are optimized, and cost, construction difficulty, installation effect and energy-saving tests are carried out. The types of insulation materials, structures and construction processes with obvious advantages are internally reviewed.

[0019] According to the axis and elevation dimensions, draw the window edge position control line and the bonding finish surface control line; according to the wall size, evenly distribute the rock wool and perform pre-layout to avoid small pieces of rock wool on the wall.

[0020] According to the elevation control line, pallets are set between each floor; the distance between adjacent pallets on the same floor is not more than 1200mm, and the pallets can be reinforced with 2 expansion bolts. The diameter of the expansion bolts should be ≥8mm, and the length should meet the anchoring requirements, generally ≥80mm; the installation of pallets can bear the deadweight of a certain area of ​​the external wall insulation system, effectively preventing the creep of the system due to its deadweight, and improving the safety factor of the system.

[0021] The first layer of rock wool strips is installed; the rock wool strip positioning line is determined, the rock wool strips are laid, and the external insulation system of the rock wool strips is bonded to the base wall. The effective bonding area rate should not be less than 70%; the rock wool strips must be butted and squeezed against each other, and the gap is controlled within 1.5mm. The gap is sealed with rock wool strips of appropriate width; they should be pasted in a horizontal masonry manner, and the vertical joints should be staggered row by row, and the staggered size should not be less than 200mm; the four corners of openings such as doors and windows should be cut and formed with a whole piece of rock wool strips, and no splicing is allowed. The joints of the rock wool strips should be more than 200mm away from the four corners of the opening. The width of other rock wool strips on the four sides of the opening should also be no less than 200mm.

[0022] Installation of the second layer of rock wool strips: The installation method of the second layer of rock wool strips is the same as that of the first layer. It must be installed with staggered joints and adhesively bonded to the first layer, and it is strictly forbidden to have through joints with the base wall.

[0023] The first coat of mesh plastering: After the installation of the rock wool strips, the first coat of mesh plastering is carried out. The construction of the facing mortar should be carried out from top to bottom and from left to right in each section of the construction area node; after the bottom layer of facing mortar is applied, when the glue has not yet dried, immediately lay the reinforced alkali-resistant mesh cloth, and the curved surface of the alkali-resistant mesh should face the wall when laying; the length of a single mesh cloth should not be greater than 6m; when laying the alkali-resistant mesh cloth, smooth it with a trowel from the center to the surroundings until the alkali-resistant mesh cloth is completely embedded in the facing mortar, and no leakage is allowed; when the standard mesh cloth needs to be overlapped, the overlap length requirement of 100mm must be met, and the reinforced mesh only needs to be butt-jointed, and the butt edges should be tight; at the corners, the mesh cloth should be continuous, and the width of the wall after wrapping around the corners in both directions on each side should not be less than 200mm; there must be facing mortar in the middle of the overlapping part of the standard mesh cloth, and dry overlap is strictly prohibited.

[0024] Install anchors; mechanical anchoring is performed after the first layer of mesh plastering is dry, which will increase the overall safety of the insulation system. The number of anchors should not be less than 12 / m2, and there should be at least 2 anchors on each rock wool strip; according to the construction drawings, drill holes at the anchor installation location, knock in nylon sleeves with discs, and compact the rock wool; when the first layer of mesh is a cavity block and aerated concrete, anchors with expansion and retraction functions should be used. The effective anchoring depth of the anchor entering the base wall should not be less than 50mm; when the base wall is aerated concrete blocks, the effective anchoring depth should not be less than 50mm.

[0025] The second coat of mesh plastering: After the anchors are installed and accepted (on-site testing of tensile strength), the second coat of mesh plastering is carried out. The process is the same as the first coat, and the anchors must be completely covered.

[0026] Finally, putty or paint the surface according to construction requirements.

[0027] The beneficial effects brought about by the technical solution provided by the embodiment of the utility model are as follows: by analyzing the structural performance of the thermal insulation material and utilizing the high pull-out strength of the transverse wire, the rock wool board is subjected to secondary processing, so that the fibers in the rock wool strips are perpendicular to the exterior wall surface, thereby increasing the tensile bonding strength between the thermal insulation material and the exterior wall and reducing the risk of the thermal insulation material falling off; the rock wool strips are bonded to the base layer and between the two layers of rock wool strips with mortar, and are fixed with staggered joints, and a support plate is added to each layer to prevent the rock wool from sagging locally due to its own weight, resulting in appearance defects. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solution of the present utility model, a brief introduction will be given to the drawings used in the embodiments below. Obviously, the drawings listed below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0030] Figure 2 The utility model is a flowchart of a construction method of a passive house exterior curtain wall insulation structure in an embodiment of the utility model.

[0031] In the accompanying drawings, the components represented by the various reference numerals are listed as follows: 1. Insulation layer 1; 2. Insulation layer 2; 3. Support plate. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail in combination with the embodiments below. Of course, the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0033] Embodiment 1:

[0034] See also Figure 1 A passive house exterior curtain wall insulation structure, characterized in that it comprises an insulation layer 1 and an insulation layer 2 composed of a plurality of rock wool strips, the vertical seams between the insulation layer 1 and the insulation layer 2 should be staggered row by row, and the staggered size should not be less than 200 mm;

[0035] The insulation layer 1 and the surface of the wall base layer, the insulation layer 1 and the insulation layer 2 are fixed by bonding;

[0036] A reinforced alkali-resistant mesh cloth is laid on the outside of the second insulation layer 2, and the reinforced alkali-resistant mesh cloth is fixed by a mortar protective layer.

[0037] It also includes an anchoring piece whose outer end is fixed in the mortar protective layer and whose inner end is anchored in the wall.

[0038] The outer surface of the rock wool strips is coated with an interface agent.

[0039] A support plate 3 is fixedly arranged on the wall and between each floor, and the distance between two adjacent support plates 3 on the same floor is not greater than 1200 mm.

[0040] The effective bonding area ratio between the insulation layer 1 and the wall base surface should not be less than 70%.

[0041] The gap between adjacent rock wool strips is within 1.5mm.

[0042] The direction of the fiber layer in the rock wool strip is perpendicular to the wall base.

[0043] The size of rock wool strips is generally determined according to actual conditions. The width is generally 10 cm to 60 cm, the thickness is generally 2 cm to 10 cm, and the length is generally about 100-200 cm, preferably 100-120 cm.

[0044] Embodiment 2:

[0045] See also Figure 1-Figure 2 A construction method for a passive house exterior curtain wall insulation structure, characterized by comprising:

[0046] S1. Wall base treatment: Check and accept the base, whether the flatness and lines are straight and clear. The base surface is required to be flat and dry (cement mortar surface should be maintained for more than 14 days), free of floating dust, asphalt and other stains, and PH <10, moisture content <10%; if the base is uneven, cement mortar is required to make a leveling layer with a thickness of no more than 20mm.

[0047] S2. Apply two coats of interface agent to the rock wool strips. Applying two coats of interface agent to the rock wool strips can increase the strength and rigidity of the rock wool board, making it more solid and stable. It can also play a role in waterproofing and moisture-proofing, extending the service life. The interface agent can be pasted only after it is dry. Before applying, it is necessary to check the rock wool strip certificate and performance test report; conduct on-site inspections of specifications, dimensions and bulk density, and archive the on-site acceptance records.

[0048] In addition, the testing of rock wool strips specifically includes:

[0049] The performance and structural form of external wall insulation materials are studied. Through experiments and retrieval of the company's previous project data, through comparison and model simulation, the types of external wall insulation materials and structural forms that meet the requirements are selected in comparison with the requirements of passive house external wall insulation structures. For the external wall insulation materials and structures that meet the requirements, their suitable installation and construction processes are selected, and tensile bonding field tests are carried out. According to relevant standards and specifications, the insulation materials, structures and construction processes that meet the requirements are selected for evaluation. The selected insulation materials, structures and construction processes that meet the requirements are optimized, and the cost, construction difficulty, installation effect and energy-saving tests are carried out. The types, structures and construction processes of insulation materials with obvious advantages are internally reviewed. In the process of studying the external wall insulation system, the insulation performance of the insulation system is calculated through the existing theory, and the existing models are used to simulate the actual performance of various insulation systems in this building. By improving the construction process, the innovation and breakthrough of the passive house external wall insulation system is completed, and a complete passive house external wall insulation system is formed, which promotes the decoration project to meet the dual carbon principle, green construction, and ecological environmental protection.

[0050] S3. According to the axis and elevation dimensions, draw the window edge position control line and the bonding completion surface control line; according to the wall size, evenly distribute the rock wool and perform pre-layout to avoid small pieces of rock wool on the wall.

[0051] S4. According to the elevation control line, a pallet 3 is set between each floor; the distance between adjacent pallets 3 on the same floor shall not exceed 1200mm, and the pallet 3 can be reinforced with 2 expansion bolts. The diameter of the expansion bolts shall be ≥8mm, and the length shall meet the anchoring requirements, generally ≥80mm; the installation of pallet 3 can bear the deadweight of a certain area of ​​the external wall insulation system, effectively preventing the creep of the system due to its heavy deadweight, and improving the safety factor of the system.

[0052] S5. Installation of the first layer of rock wool strips; determine the rock wool strip positioning line, lay the rock wool strips, and use bonding between the rock wool strip external insulation system and the base wall. The effective bonding area rate should not be less than 70%; the rock wool strips must be butt-jointed and squeezed together, and the gap should be controlled within 1.5mm. The gap should be sealed with rock wool strips of appropriate width; they should be pasted in a horizontal masonry manner, and the vertical joints should be staggered row by row, and the staggered size should not be less than 200mm; the four corners of openings such as doors and windows should be cut and formed with a whole piece of rock wool strips, and no splicing is allowed. The joints of the rock wool strips should be more than 200mm away from the four corners of the opening. The width of other rock wool strips on the four sides of the opening should also be no less than 200mm.

[0053] S6. Installation of the second layer of rock wool strips: The installation method of the second layer of rock wool strips is the same as that of the first layer. It must be installed with staggered joints and glued to the first layer. It is strictly forbidden to have through joints with the base wall.

[0054] S7. The first coat of mesh plastering: After the installation of the rock wool strips, the first coat of mesh plastering shall be carried out. The construction of the facing mortar shall be carried out from top to bottom and from left to right in each section of the construction area. After the bottom layer of facing mortar is applied, when the glue has not yet dried, the reinforced alkali-resistant mesh cloth shall be laid immediately, and the curved surface of the alkali-resistant mesh shall face the wall when laying. The length of a single mesh cloth should not be greater than 6m. When laying the alkali-resistant mesh cloth, smooth it with a trowel from the center to the surroundings until the alkali-resistant mesh cloth is completely embedded in the facing mortar, and no leakage is allowed. When the standard mesh cloth needs to be overlapped, the overlap length requirement of 100mm must be met, and the reinforced mesh only needs to be butt-jointed, and the butt edges should be tight. At the corners, the mesh cloth should be continuous, and the width of the wall after wrapping around the corners in both directions on each side should not be less than 200mm. There must be facing mortar in the middle of the overlapping part of the standard mesh cloth, and dry overlap is strictly prohibited.

[0055] S8. Install anchors; mechanical anchoring is performed after the first layer of mesh plastering is dry, which will increase the overall safety of the insulation system. The number of anchors should not be less than 12 / m2, and there should be at least 2 anchors on each rock wool strip; according to the construction drawings, holes should be drilled at the anchor installation location, and nylon sleeves with discs should be knocked in to compact the rock wool; when the first layer of mesh is a cavity block and aerated concrete, anchors with expansion and retraction functions should be used. The effective anchoring depth of the anchor entering the base wall should not be less than 50mm; when the base wall is aerated concrete blocks, the effective anchoring depth should not be less than 50mm.

[0056] S9, second coat of mesh plastering: After the anchors are installed and accepted (on-site testing of tensile strength), the second coat of mesh plastering is carried out, the process is the same as the first coat, and the anchors must be completely covered.

[0057] Finally, putty or paint the surface according to construction requirements.

[0058] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A passive house exterior curtain wall insulation structure, characterized in that: It includes a first insulation layer and a second insulation layer composed of a plurality of rock wool strips. The vertical seams between the first insulation layer and the second insulation layer should be staggered row by row, and the staggered size should not be less than 200mm. The insulation layer 1 and the surface of the wall base layer, and the insulation layer 1 and the insulation layer 2 are fixed by bonding; A reinforced alkali-resistant mesh cloth is laid on the outside of the second thermal insulation layer, and the reinforced alkali-resistant mesh cloth is fixed by a mortar protective layer.

2. The passive house exterior curtain wall insulation structure according to claim 1, characterized in that: It also includes an anchoring piece whose outer end is fixed in the mortar protective layer and whose inner end is anchored in the wall.

3. The passive house exterior curtain wall insulation structure according to claim 1, characterized in that: The outer surfaces of the rock wool strips are coated with an interface agent.

4. The passive house exterior curtain wall insulation structure according to claim 1, characterized in that: The effective bonding area ratio between the thermal insulation layer 1 and the surface of the wall base layer should not be less than 70%.

5. The passive house exterior curtain wall insulation structure according to claim 1, characterized in that: The gap between adjacent rock wool strips is within 1.5mm.

6. The passive house exterior curtain wall insulation structure according to claim 1, characterized in that: The direction of the fiber layer in the rock wool strip is perpendicular to the wall base.

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