CN117166628A - Construction method of building outer wall sealant - Google Patents
Construction method of building outer wall sealant Download PDFInfo
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- CN117166628A CN117166628A CN202311048112.XA CN202311048112A CN117166628A CN 117166628 A CN117166628 A CN 117166628A CN 202311048112 A CN202311048112 A CN 202311048112A CN 117166628 A CN117166628 A CN 117166628A
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- 239000000565 sealant Substances 0.000 title claims abstract description 105
- 238000010276 construction Methods 0.000 title claims abstract description 82
- 239000000463 material Substances 0.000 claims abstract description 50
- 239000003292 glue Substances 0.000 claims abstract description 39
- 238000007789 sealing Methods 0.000 claims abstract description 33
- 230000000873 masking effect Effects 0.000 claims abstract description 22
- 239000000758 substrate Substances 0.000 claims abstract description 15
- 230000000694 effects Effects 0.000 claims abstract description 13
- 230000001680 brushing effect Effects 0.000 claims abstract description 10
- 239000011248 coating agent Substances 0.000 claims abstract description 6
- 238000000576 coating method Methods 0.000 claims abstract description 6
- 239000006260 foam Substances 0.000 claims description 22
- 238000007790 scraping Methods 0.000 claims description 15
- 239000000428 dust Substances 0.000 claims description 14
- 238000004806 packaging method and process Methods 0.000 claims description 14
- 238000004513 sizing Methods 0.000 claims description 10
- 239000002390 adhesive tape Substances 0.000 claims description 9
- 238000005498 polishing Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 239000000084 colloidal system Substances 0.000 claims description 7
- 239000002699 waste material Substances 0.000 claims description 7
- 239000000853 adhesive Substances 0.000 claims description 6
- 230000001070 adhesive effect Effects 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 6
- 239000011148 porous material Substances 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 5
- 230000001627 detrimental effect Effects 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 238000012360 testing method Methods 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000007598 dipping method Methods 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 230000037452 priming Effects 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 2
- 238000004826 seaming Methods 0.000 claims description 2
- 238000009435 building construction Methods 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 4
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- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 239000003973 paint Substances 0.000 description 4
- 238000004026 adhesive bonding Methods 0.000 description 3
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- 238000004078 waterproofing Methods 0.000 description 2
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- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 1
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Abstract
The application relates to the technical field of building construction, in particular to a construction method of building outer wall sealant, which comprises the following steps: step S1, designing and assembling the joint width of an external wall panel of the integral concrete shear wall structure on the premise of meeting the expansion allowance of a base material; s2, joint treatment; step S3, placing a backing material on the joint of the surface of the base material; s4, sticking the masking tape on the substrate positive angles at two sides of the joint; step S5, brushing a base coat, wherein the base coat is uniformly coated on the bonding surface of the base material; and S6, after the bottom coating is dried, sealing glue is constructed for joint filling. The construction method is suitable for joint sealant construction of the external wall panel of the assembled integral concrete shear wall structure, the building external wall has a long-term effective waterproof sealing effect, the waterproof sealing effect of the building external wall is improved, and the maintenance cost of the building is low.
Description
Technical Field
The application relates to the technical field of building construction, in particular to a construction method of building outer wall sealant.
Background
In recent years, along with rapid development of assembled buildings in China, prefabricated external wall panels (beam lower panels) are increasingly widely applied to public buildings, and sealing glue sealing filling is needed for joints of the external walls of the buildings in order to ensure the waterproof effect of the external walls of the buildings. In the existing prefabricated external wall panel assembly construction, in order to solve the problems that glue-sealing and water-proofing of a plate seam are easy to age for a long time and finally water leakage is caused, the related art discloses a planar splicing seam waterproof sealing construction method, and a splicing seam waterproof sealing structure is formed by mutually matching a sinking part, a coiled material waterproof layer, a first stamping sheet metal part, a second stamping sheet metal part, an elastic rubber strip and the like, so that the splicing seam can be stably and permanently sealed in a waterproof manner; however, the waterproof sealing construction method for the planar splice joint has short waterproof service life and is not suitable for sealant construction of the outer wall of a building.
Disclosure of Invention
The application provides a construction method of building outer wall sealant, which aims to improve the waterproof sealing effect of the building outer wall and facilitate construction and later maintenance.
The following technical scheme is adopted:
a construction method of a building outer wall sealant comprises the following steps:
step S1, designing and assembling the joint width of an external wall panel of the integral concrete shear wall structure on the premise of meeting the expansion allowance of a base material;
s2, joint treatment, namely removing substances which are unfavorable for bonding at joints on the surface of the base material, and cleaning dust impurities;
step S3, placing a backing material on the joint of the surface of the substrate, wherein a round or flat foam rod with soft closed pores is used as the backing material;
s4, sticking a masking tape on the positive corners of the base materials at two sides of the joint, and sticking masking paper vertically and flatly;
step S5, brushing a base coat, wherein the base coat is uniformly coated on the bonding surface of the base material;
and S6, after the bottom coating is dried, sealing glue is constructed for joint filling.
In the conventional design, the width of the horizontal and vertical conventional standard width joints is 10-30 mm, the assembled integral concrete shear wall structure is formed by assembling single prefabricated components, the outer wall plate joints are greatly affected by external factors in the hoisting process, and the common joint width interval is 5-40 mm.
Further, for the narrow seam with the special node smaller than the conventional standard width seam, namely when the seam width is smaller than 10mm, firstly widening the narrow seam to more than 10mm by polishing, bonding the two surfaces of the sealing glue seam with the bonding thickness not smaller than 10mm plus or minus 2mm, and then performing construction according to the steps 2 to 6.
Alternatively, the narrow seam is polished using an angle grinder.
Further, in step S1, for the wide seam with the special node being larger than the seam with the conventional standard width, that is, when the seam width is larger than 30mm, the back lining is twisted into a twist shape by using the foam rod to fill up the actual wide seam, the glue is applied according to the actual seam width, the waterproof quality is preferentially ensured, meanwhile, the compatibility test of the sealant and the finishing material is carried out for different facade finishing materials, the situation that the finishing material does not fall off when covering the sealant is ensured, and then the construction is carried out according to steps 2 to 6.
Optionally, in step S2, the seaming process removes substances that are detrimental to adhesion using a buffing machine or a doctor blade tool, and cleans the substrate surface of dust and impurities using a blower or a soft brush.
Substances that are detrimental to adhesion include dust, paint, cement slurry, and other particulates that are detrimental to adhesion; the part of the paper with the decorative patterns is also polished by a polishing machine so as to avoid uneven scraping; and the surface of the base material subjected to joint treatment ensures that the base material is dry, clean, compact and uniform in texture.
Further, in step S3, the diameter of the foam rod is greater than the joint width by more than 5mm, the width-to-thickness ratio is in the range of 1:1 to 1:2, and the bonding depth of the sealant and the substrate is controlled to be 10mm±2mm.
A round or flat foam rod with soft closed pores is used as a backing material to control the sizing thickness and shape of the sealant; placing the foam rod through a finger or other smooth objects, and avoiding using a sharp device to avoid puncturing the foam rod;
further, when the seam width is too small or is covered with a filler to place the backing material, an adhesive release tape is used to cover the seam bottom. If the sealant is directly adhered to the bottom of the substrate, three-sided adhesion is formed, and the deformability of the sealant is affected.
Further, in step S4, the textured paper is at least 2mm from the edge of the seam.
And the masking paper is stuck, so that the pollution to the edge of the prefabricated part caused by redundant sealant is prevented when the primer and the glue are applied in construction, and the masking paper is stuck vertically and flatly.
Further, in step S5, the priming includes the following steps:
step S51, opening the packaging bottle, pouring out a proper amount of primer into a sub-packaging container such as a plastic cup, sealing the packaging bottle in time, and covering the bottle cap;
step S52, dipping a proper amount of base coat by using a soft brush, uniformly brushing the base coat on the bonding surface of the base material, and not brushing too thick;
step S53, the sealant can be constructed after the primer is dried, and the sealant must be glued within 8 hours after the primer is dried, otherwise, the primer needs to be recoated;
in step S54, the unused base coat is treated as waste material without being reworked into the original packaging bottle.
The assembled building joint sealant must be matched with corresponding base coat of manufacturers.
Further, in step S6, the construction sealant caulking includes the steps of:
step S61, confirming that the foam rod is placed completely before the sealant is constructed, and ensuring that the width-to-thickness ratio meets the requirement; masking tape is stuck on the edges of two sides of the joint; the substrate surface is dried, and no dust exists;
step S62, cutting the glue nozzle to a proper caliber along an angle of 45 degrees according to the width of the joint, putting the sealant into a glue gun, detecting the glue nozzle to the bottom of the joint, continuously pumping the sealant at a constant speed and slightly overflowing, and avoiding the generation of a cavity under the glue and the adhesive tape;
step S63, ensuring that the sealant is well combined with the bonding surface, and ensuring the designed width-to-thickness ratio;
step S64, when the cross interface or the T-shaped interface is glued, enough sealant is extruded at the interface, and the glue is respectively pulled and glued in other directions;
step S65, after the sealant is constructed, the sealant is scraped and compacted by a tongue pressing rod or a scraping sheet, and the edges of the sealant and the gap are smeared and filled, so that the sealing effect is enhanced;
step S66, filling small holes at the edge of the sealant by using the sealant, and simultaneously avoiding repeated scraping and keeping a scraping tool clean;
step S67, if the adhesive tape is required to be connected subsequently during construction, the tail part of the adhesive tape is trimmed to form an oblique angle of 45 degrees, so that subsequent joints are facilitated;
step S68, constructing at high temperature in summer and autumn, finishing the surface of the colloid into a flat and attractive plane shape by a scraper, constructing at low temperature in winter and spring, and finishing the surface of the colloid into a concave shape by a scraping sheet;
and step S69, removing the masking tape before the surface of the sealant is dried.
When the sealant is used for construction, the construction is carried out under the condition that the temperature of the base material is 5-45 ℃, the construction is not easy to be carried out when the concrete base surface is not dried, the construction is not easy to be carried out when the concrete base surface is in overcast and rainy weather or after heavy rain, and the stress is not easy to be applied before the adhesive force is generated by the colloid.
After the construction is completed, the rubber surface is inspected: the width and thickness of the glue injection of the waterproof sealing glue meet the design requirements, the glue injection is uniform, straight and compact, the surface is smooth, and no crack exists.
And after the glue surface is inspected to be qualified, cleaning the construction site to leave garbage.
In summary, the present application includes at least one of the following beneficial technical effects:
the application provides a construction method of building outer wall sealant, which is suitable for the construction of the joint sealant of the outer wall board of the assembled integral concrete shear wall structure, the building outer wall has a long-term effective waterproof sealing effect, the waterproof sealing effect of the building outer wall is improved, and the maintenance cost of the building is low.
Drawings
FIG. 1 is a construction flow chart of the present application;
Detailed Description
The present application will be described in further detail with reference to fig. 1.
As shown in fig. 1, the construction method of the building outer wall sealant comprises the following steps:
step S1, designing and assembling the joint width of an external wall panel of the integral concrete shear wall structure on the premise of meeting the expansion allowance of a base material;
s2, joint treatment;
step S3, placing a backing material on the joint of the surface of the base material;
s4, sticking the masking tape on the substrate positive angles at two sides of the joint;
step S5, brushing a base coat, wherein the base coat is uniformly coated on the bonding surface of the base material;
and S6, after the bottom coating is dried, sealing glue is constructed for joint filling.
Before construction, the construction tools and construction materials are prepared and the safety equipment is checked.
The construction tool mainly comprises a base material cleaning tool and a sizing tool.
The tool for cleaning the base material is mainly as follows: hand-held polishing machine, grinder, hand-held electric blower, shovel blade, brush and wire brush.
The sizing tool is mainly as follows: steel ruler, shovel blade, hand-held glue gun, tongue pressing rod and scraping piece.
The main materials of the construction materials are as follows: round or flat foam bars with soft closed pores, masking tapes, adhesive isolating belts, sealant and matched base coat.
The construction technology mainly relies on the sealant to carry out the water-proof treatment of the edge joints of the external wall panels, so that the performance requirement of the sealant plays a crucial role in the water-proof quality, and the main performances are as follows:
bonding with concrete
The assembled building wallboard material is concrete, and as the concrete slab is a porous material, the concrete is alkaline, and the surface is adhered with the influence of factors such as release agent, and the like, the adhesion between the sealant and the surface of the concrete is not easy to realize. Once the bonding failure occurs, the water leakage problem occurs, the wall gaps of the assembled building are through, water leaks at one place, and water can enter the joints of the multi-layer building.
Therefore, the selected sealant has better cohesiveness with concrete.
Weather resistance and durability
The normal service life of the building in China is 50 years, the prefabricated external wall panel is used as a building outer protective structure, the sealant for the joints of the external wall panel is also completely exposed, and the sealant can be aged gradually under the influence of factors such as wind, rain, ultraviolet irradiation and the like.
Therefore, the selected sealant needs to have certain weather resistance and durability to ensure the long-term effective waterproof sealing effect. The better the weather resistance and durability of the sealant, the lower the maintenance cost of the building.
Paintability of brush
Most of the assembled building external wall panels need further coating, on one hand, the overall waterproof performance of the outer wall is enhanced, on the other hand, the attractive effect of the building is improved, and on the other hand, the sealant can be protected, and the service life of the sealant is prolonged.
Therefore, the surface of the selected sealant has certain paintability, otherwise, the exterior wall paint can crack and fall off, and the waterproof performance and the attractive effect of the building are reduced.
Resistance to displacement
The joints of the concrete external wall panels of the assembled building can generate telescopic deformation and displacement movement due to temperature and humidity changes, shrinkage of concrete slabs, slight vibration or sedimentation of the building and the like.
Therefore, the selected sealant has certain displacement capacity, can freely stretch and retract along with the opening and closing deformation of the joint so as to keep the joint sealed, and simultaneously, in order to prevent the sealant from cracking, the joint is ensured to have safe and reliable bonding sealing, and the displacement capacity of the sealant is required to be larger than the relative displacement of the plate joint.
Safety measures are needed to be made before construction:
1. the construction of the assembled integral concrete structure engineering meets the regulations of the existing related standards such as 'building construction safety inspection standard' JGJ59, 'building construction site environment and sanitation standard' JGJ146, and 'construction engineering site fire-fighting safety technical Specification' GB 50720;
2. the construction unit shall carry out safety training on sizing personnel, and carry out safety technical mating on the operators before construction operation;
3. the green construction, dust emission control, environmental protection and the like of the assembled integral concrete structure engineering meet the national and local related standard regulations;
4. the external wall seam gluing is completed by means of a hanging basket, high-altitude operators are specially trained, and the workers can work on duty after the gluing workers acquire operation qualification books. The operators should be provided with safety protection articles according to the regulations and correctly used;
5. the high-altitude operation should have corresponding safety protection measures, and the used tools, spare parts and the like should take anti-falling measures to strictly forbid up and down throwing;
6. the high-altitude operation hanging basket should be provided with a notice and a detection acceptance according to the regulations, and the hanging basket is not qualified by the detection acceptance and cannot be put into use.
In addition, environmental protection measures are needed:
1. the construction waste (such as a masking tape and a sealant packaging bag) is strictly forbidden in the gluing process, and the construction waste is arranged in a closed type waste station or a container for centralized outward transportation, so that the construction waste recycling technology is greatly promoted;
2. part of the narrow slits are cut by a polishing machine to generate part of dust, a special scheme for controlling dust pollution should be formulated, and the site construction should meet the relevant regulation requirements of dust control;
3. a propaganda slogan and a dangerous source identifier are arranged on the scene;
4. and (5) sorting and stacking the field materials.
The joint width of the external wall panel of the assembled integral concrete shear wall structure is larger than that of other building joints, and the service lives of the building and the sealant can be guaranteed by the correct joint design. On the premise of meeting the expansion allowance of the base material, the width of the joint is not less than 10mm;
when the joint width is more than 10mm and less than 30mm, the glue width-thickness ratio is 1:1 to 2:1, and the bonding thickness of the two surfaces of the sealant gap is controlled to be 10mm plus or minus 2mm.
In the conventional design, the width of the horizontal and vertical conventional standard width joints is 10-30 mm, the assembled integral concrete shear wall structure is formed by assembling single prefabricated components, the outer wall plate joints are greatly affected by external factors in the hoisting process, and the common joint width interval is 5-40 mm.
Furthermore, for the narrow seam with the special node smaller than the conventional standard width seam, namely when the seam width is smaller than 10mm, the narrow seam is firstly widened to be more than 10mm by polishing, the bonding thickness of two sides of the sealing glue seam is not smaller than 10mm plus or minus 2mm, the glue outlet of the glue nozzle is cut small for different seams, the seams can be scraped after being filled at one time, and the rest of construction flows refer to the steps 2 to 6.
For the wide seam with the special node being larger than the seam with the conventional standard width, namely the seam width is larger than 30mm, and the bonding thickness of the two surfaces of the sealing glue seam should be controlled to be 10mm plus or minus 2mm. The foam rod for backing is twisted into a twist shape to fill up the actual wide seam, sizing is carried out according to the actual seam width, the waterproof quality is preferentially ensured, meanwhile, compatibility tests of sealant and finishing materials are carried out aiming at different outer elevation finishing materials, the sealant is prevented from falling off when the finishing materials cover the sealant, meanwhile, two sizing steps are suggested, secondary sizing is carried out after primary curing, and sagging caused by gravity is avoided, so that the sealant collapses. The rest of the construction flow is executed by referring to the construction technology. And (5) constructing the rest construction flows according to the steps 2 to 6.
The joint treatment comprises the following steps:
step S21, removing substances which are unfavorable for bonding, such as dust, paint, cement slurry and other particles which are unfavorable for bonding by using tools such as a polishing machine or a shovel blade;
step S22, the part of the paper with the decorative patterns is polished by a polishing machine so as to avoid uneven scraping;
step S23, cleaning dust, impurities and the like remained on the surface of the substrate due to polishing by using compressed air (a hand-held electric blower) or a soft brush;
in step S24, the treated substrate surface should be dried, cleaned, densified and uniform in texture.
The placement of the backing material includes the steps of:
step S31, using a round or flat foam rod with soft closed pores as a backing material to control the sizing thickness and shape of the sealant;
step S32, placing the foam rod by a finger or other smooth objects, and avoiding using a sharp tool to avoid puncturing the foam rod;
step S33, controlling the sizing thickness of the sealant by using a foam rod (the diameter of the foam rod is usually more than 5mm larger than the joint width) to realize the width-to-thickness ratio of 1:1 to 2:1 (the bonding depth of the sealant and the substrate is controlled to be 10mm (+ -2);
step S34, if the foam rod is to be connected subsequently, the tail part of the foam rod is reserved to form a 45-degree oblique angle, so that subsequent joints are facilitated;
in step S35, if the seam is too small or covered with filler to place the backing material, an adhesive release tape is used to cover the bottom of the seam. If the sealant is directly adhered to the bottom of the substrate, three-sided adhesion is formed, and the deformability of the sealant is affected.
The method for sticking the masking tape comprises the following steps:
step S41, after the foam rod is placed, preferably pasting masking tapes on two sides of the joint, wherein the masking tapes are about 2mm away from the edge;
and S42, pasting the masking paper, wherein the masking paper is required to be vertically flattened, and the pollution of redundant sealant to the edge of the prefabricated part is prevented when the masking paper is subjected to prime coating and glue application.
The assembled building joint sealant must be matched with corresponding base coat of manufacturers for use
The priming paint comprises the following steps:
step S51, opening the packaging bottle, pouring out a proper amount of primer into a sub-packaging container such as a plastic cup, sealing the packaging bottle in time, and covering the bottle cap;
step S52, dipping a proper amount of base coat by using a soft brush, uniformly brushing the base coat on the bonding surface of the base material, and not brushing too thick;
step S53, the sealant can be constructed after the primer is dried, and the sealant must be glued within 8 hours after the primer is dried, otherwise, the primer needs to be recoated;
in step S54, the unused base coat is treated as waste material without being reworked into the original packaging bottle.
The construction sealant comprises the following steps:
step S61, confirming that the foam rod is placed completely before the sealant is constructed, and ensuring that the width-to-thickness ratio meets the requirement; masking tape is stuck on the edges of two sides of the joint; the substrate surface is dried, and no dust exists;
step S62, cutting the glue nozzle to a proper caliber along an angle of 45 degrees according to the width of the joint, putting the sealant into a glue gun, detecting the glue nozzle to the bottom of the joint as much as possible, keeping proper speed, continuously beating enough sealant and slightly overflowing, and avoiding generating a cavity under the glue and the adhesive tape;
step S63, ensuring that the sealant is well combined with the bonding surface, and ensuring the designed width-to-thickness ratio;
step S64, when the cross-shaped interface or the T-shaped interface is glued, enough sealant is extruded at the interface, and the glue is respectively pulled and glued in other directions;
step S65, after the sealant is constructed, the sealant is scraped and compacted by a tongue pressing rod, a scraping sheet or other tools, and the edges of the sealant and the gap are smeared and filled, so that the sealing effect is enhanced;
step S66, filling small holes at the edge with sealant, and simultaneously avoiding repeated scraping and keeping a scraping tool clean;
step S67, if the adhesive tape is required to be connected subsequently during construction, the tail part of the adhesive tape is trimmed to form an oblique angle of 45 degrees, so that subsequent joints are facilitated;
step S68, constructing at high temperature (higher than 10 ℃) in summer and autumn, finishing the surface of the glue into a flat and attractive plane shape by using a scraper, constructing at low temperature (lower than or equal to 10 ℃) in winter and spring, and finishing the surface of the glue into a concave shape by using a scraping sheet;
in step S69, the masking tape must be removed before the sealer is dried.
And (3) quality control after construction process and construction completion: 1. the sealant should be fine, uniform paste or viscous liquid, and should not have bubbles, crust or gel;
2. the minimum unit package of the sealant product should have a firm non-discoloring mark;
3. the sealant product is packaged in a supporting way or a barrel way, and the packaging container is sealed;
4. the width of the transverse and vertical joint seams of the prefabricated external wall panel meets the design requirement, and measures for controlling the precision of the joint seam should be taken during construction;
5. the wall surface is treated firstly to prevent sagging, dislocation, corner falling edge exceeding 3cm, plate seam blockage and the like, and after the steel pipe on the wall surface is removed to the edge of the seam, the outer wall sealant can be used for the next construction.
6. After the former procedure is qualified through inspection, joint sealing waterproof construction can be carried out, and pipelines, embedded parts and the like extending out of the outer wall are required to be installed before the waterproof construction;
7. the joint waterproof treatment of the prefabricated external wall panel meets the design requirement, and waterproof and drainage measures combining structural waterproof and material waterproof are preferably selected;
8. before sealing and waterproofing construction, the joint should be cleaned up and kept dry;
9. the width and thickness of the glue injection of the waterproof sealing glue meet the design requirements, the glue injection is uniform, straight and compact, the surface is smooth, and no crack exists;
10. after the sealing waterproof construction is finished, the outer wall is subjected to a water spraying test, and whether leakage exists in the inner wall of the outer wall is observed;
11. the construction should be carried out at the temperature of 5-45 ℃ of the base material, the construction is not suitable for the concrete base surface without drying, the construction is not suitable for the concrete base surface after overcast and rainy weather and heavy rain, and the stress is not suitable for the concrete body before the adhesive force is generated.
The embodiments of the present application are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in this way, therefore: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.
Claims (10)
1. The construction method of the building outer wall sealant is characterized by comprising the following steps of:
step S1, designing and assembling the joint width of an external wall panel of the integral concrete shear wall structure on the premise of meeting the expansion allowance of a base material;
s2, joint treatment, namely removing substances which are unfavorable for bonding at joints on the surface of the base material, and cleaning dust impurities;
step S3, placing a backing material on the joint of the surface of the substrate, wherein a round or flat foam rod with soft closed pores is used as the backing material;
s4, sticking a masking tape on the positive corners of the base materials at two sides of the joint, and sticking masking paper vertically and flatly;
step S5, brushing a base coat, wherein the base coat is uniformly coated on the bonding surface of the base material;
and S6, after the bottom coating is dried, sealing glue is constructed for joint filling.
2. The construction method of the building outer wall sealant according to claim 1, wherein the construction method comprises the following steps: in the step S1, when the joint width is smaller than 10mm, firstly widening the narrow joint to more than 10mm by polishing, and bonding the two surfaces of the sealant joint gap to be not smaller than 10mm, and then performing construction according to the steps 2 to 6.
3. The construction method of the building outer wall sealant according to claim 2, wherein the construction method comprises the following steps: the narrow seam is polished using an angle grinder.
4. The construction method of the building outer wall sealant according to claim 1, wherein the construction method comprises the following steps: in the step S1, when the joint width is larger than 30mm, the back lining is twisted into a twist shape by using a foam rod to fill up an actual wide joint, sizing is carried out according to the actual joint width, the waterproof quality is preferentially ensured, meanwhile, compatibility tests of sealant and finishing materials are carried out aiming at different outer elevation finishing materials, the situation that the sealing colloid is not fallen off when the finishing materials are covered by the sealing colloid is ensured, and then construction is carried out according to the steps 2 to 6.
5. The construction method of the building outer wall sealant according to claim 1, wherein the construction method comprises the following steps: in step S2, the seaming process removes substances that are detrimental to adhesion using a grinder or a scraper tool, and cleans the substrate surface of dust and impurities using a blower or a brush.
6. The construction method of the building outer wall sealant according to claim 1, wherein the construction method comprises the following steps: in the step S3, the diameter of the foam rod is more than 5mm larger than the joint width, and the width-to-thickness ratio is 1:1-1:2.
7. The construction method of the building exterior wall sealant according to claim 6, wherein the construction method comprises the following steps: when the seam width is too small or covered by a filler to place the backing material, an adhesive release tape is used to cover the seam bottom.
8. The construction method of the building outer wall sealant according to claim 1, wherein the construction method comprises the following steps: in the step S4, the distance between the textured paper and the edge of the seam is more than 2mm.
9. The construction method of the building outer wall sealant according to claim 1, wherein the construction method comprises the following steps: in step S5, the priming coat comprises the following steps:
step S51, opening the packaging bottle, pouring out a proper amount of primer into a sub-packaging container such as a plastic cup, sealing the packaging bottle in time, and covering the bottle cap;
step S52, dipping a proper amount of base coat by using a soft brush, uniformly brushing the base coat on the bonding surface of the base material, and not brushing too thick;
step S53, the sealant can be constructed after the primer is dried, and the sealant must be glued within 8 hours after the primer is dried, otherwise, the primer needs to be recoated;
in step S54, the unused base coat is treated as waste material without being reworked into the original packaging bottle.
10. The construction method of the building outer wall sealant according to claim 1, wherein the construction method comprises the following steps: in step S6, the construction sealant joint filling comprises the following steps:
step S61, confirming that the foam rod is placed completely before the sealant is constructed, and ensuring that the width-to-thickness ratio meets the requirement; masking tape is stuck on the edges of two sides of the joint; the substrate surface is dried, and no dust exists;
step S62, cutting the glue nozzle to a proper caliber along an angle of 45 degrees according to the width of the joint, putting the sealant into a glue gun, detecting the glue nozzle to the bottom of the joint, continuously pumping the sealant at a constant speed and slightly overflowing, and avoiding the generation of a cavity under the glue and the adhesive tape;
step S63, ensuring that the sealant is well combined with the bonding surface, and ensuring the designed width-to-thickness ratio;
step S64, when the cross interface or the T-shaped interface is glued, enough sealant is extruded at the interface, and the glue is respectively pulled and glued in other directions;
step S65, after the sealant is constructed, the sealant is scraped and compacted by a tongue pressing rod or a scraping sheet, and the edges of the sealant and the gap are smeared and filled, so that the sealing effect is enhanced;
step S66, filling small holes at the edge of the sealant by using the sealant, and simultaneously avoiding repeated scraping and keeping a scraping tool clean;
step S67, if the adhesive tape is required to be connected subsequently during construction, the tail part of the adhesive tape is trimmed to form an oblique angle of 45 degrees, so that subsequent joints are facilitated;
step S68, constructing at high temperature in summer and autumn, finishing the surface of the colloid into a flat and attractive plane shape by a scraper, constructing at low temperature in winter and spring, and finishing the surface of the colloid into a concave shape by a scraping sheet;
and step S69, removing the masking tape before the surface of the sealant is dried.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311048112.XA CN117166628A (en) | 2023-08-18 | 2023-08-18 | Construction method of building outer wall sealant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311048112.XA CN117166628A (en) | 2023-08-18 | 2023-08-18 | Construction method of building outer wall sealant |
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| Publication Number | Publication Date |
|---|---|
| CN117166628A true CN117166628A (en) | 2023-12-05 |
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|---|---|---|---|
| CN202311048112.XA Pending CN117166628A (en) | 2023-08-18 | 2023-08-18 | Construction method of building outer wall sealant |
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| Country | Link |
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| CN (1) | CN117166628A (en) |
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- 2023-08-18 CN CN202311048112.XA patent/CN117166628A/en active Pending
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