CN109025110B - Anti-cracking painting process for exterior wall coating - Google Patents
Anti-cracking painting process for exterior wall coating Download PDFInfo
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- CN109025110B CN109025110B CN201810968680.4A CN201810968680A CN109025110B CN 109025110 B CN109025110 B CN 109025110B CN 201810968680 A CN201810968680 A CN 201810968680A CN 109025110 B CN109025110 B CN 109025110B
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- 238000005336 cracking Methods 0.000 title claims abstract description 47
- 238000000576 coating method Methods 0.000 title claims abstract description 39
- 239000011248 coating agent Substances 0.000 title claims abstract description 35
- 238000007591 painting process Methods 0.000 title claims abstract description 17
- 238000004140 cleaning Methods 0.000 claims abstract description 33
- 238000010422 painting Methods 0.000 claims abstract description 32
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- 239000012744 reinforcing agent Substances 0.000 claims description 20
- 239000004570 mortar (masonry) Substances 0.000 claims description 19
- 238000011049 filling Methods 0.000 claims description 18
- 238000005498 polishing Methods 0.000 claims description 17
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- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- 239000003292 glue Substances 0.000 claims description 13
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 12
- 239000004568 cement Substances 0.000 claims description 10
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- 239000004566 building material Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
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- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 2
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- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- LCFVJGUPQDGYKZ-UHFFFAOYSA-N Bisphenol A diglycidyl ether Chemical compound C=1C=C(OCC2OC2)C=CC=1C(C)(C)C(C=C1)=CC=C1OCC1CO1 LCFVJGUPQDGYKZ-UHFFFAOYSA-N 0.000 description 1
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 description 1
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- ONCZQWJXONKSMM-UHFFFAOYSA-N dialuminum;disodium;oxygen(2-);silicon(4+);hydrate Chemical compound O.[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Na+].[Na+].[Al+3].[Al+3].[Si+4].[Si+4].[Si+4].[Si+4] ONCZQWJXONKSMM-UHFFFAOYSA-N 0.000 description 1
- LIKFHECYJZWXFJ-UHFFFAOYSA-N dimethyldichlorosilane Chemical compound C[Si](C)(Cl)Cl LIKFHECYJZWXFJ-UHFFFAOYSA-N 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F13/00—Coverings or linings, e.g. for walls or ceilings
- E04F13/02—Coverings or linings, e.g. for walls or ceilings of plastic materials hardening after applying, e.g. plaster
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Paints Or Removers (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention provides an anti-cracking painting process for an exterior wall coating, relates to the technical field of exterior wall painting, and aims to solve the problem that an exterior wall decorative layer in the prior art is poor in anti-cracking effect, and the anti-cracking painting process comprises the following steps: s1: repairing a base layer; s2: cleaning a base layer; s3: performing batch putty coating; s4: cleaning putty; s5: coating a primer; s6: painting a middle paint; s7: and (4) painting finish paint. The invention forms the outer wall decoration layer by repairing the base layer, blending the high-quality flexible anti-cracking putty and matching with the optimized coating, thereby improving the anti-cracking effect of the painting process and further improving the construction quality.
Description
Technical Field
The invention relates to the technical field of exterior wall painting, in particular to an anti-cracking painting process for exterior wall paint.
Background
In order to protect the main structure of a building, prolong the service life of the building, perfect the use function of the building and beautify the building, the outer wall of the building is usually decorated by using outer wall coatings, ceramic decorative materials, building decorative stones and powder scraps, wherein the outer wall coatings have better protection effect on the wall body and have outstanding advantages in the aspects of carbonization prevention, attractiveness, environmental protection and the like; however, at present, with the application of exterior wall coatings becoming more and more extensive, cracks on exterior walls of buildings become a long-term quality hotspot problem and are one of common building quality problems, and the appearance of cracks on exterior wall coatings not only affects the beauty of buildings, but also affects the interior of buildings, and even shortens the service life of the buildings.
In order to solve the problems, the chinese patent publication No. CN106590202A discloses an anti-cracking building exterior wall coating, which comprises the following components in parts by weight: 25-34 parts of styrene-acrylic emulsion, 12-15 parts of methyl acrylate, 10-15 parts of acrylic acid modified alkyd resin, 3-5 parts of dimethyldichlorosilane, 3-5 parts of unsaturated polyester resin, 7-9 parts of bisphenol A diglycidyl ether, 1-3 parts of heavy calcium carbonate powder, 2-5 parts of sodium bentonite, 0.5-1.5 parts of sepiolite fiber, 1-1.5 parts of zinc oxide, 3-5 parts of magnesium stearate, 0.3-0.5 part of triglycidyl isocyanurate, 0.3-0.5 part of diethylenetriamine, 5-10 parts of water and 1-3 parts of other auxiliary agents.
On one hand, the outer wall base layer is a cement mortar plastering layer, drying shrinkage and temperature difference shrinkage can be generated in the condensation process, internal cracks can gradually develop outwards after a windshield wiper is exposed for a period of time, and the coating surface layer with a thin paint film is difficult to resist the internal stress and can crack; on the other hand, after the putty is applied to a wall, the paint surface layer is affected due to drying shrinkage and cracking; therefore, even if the constructor uses the anti-cracking paint, the outer wall is still easy to crack, and the anti-cracking effect is poor.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides an anti-cracking painting process for an exterior wall coating, which has the advantage of good anti-cracking effect.
In order to achieve the technical purpose, the invention provides an anti-cracking painting process of an exterior wall coating, which comprises the following steps:
s1: repairing a base layer, namely detecting the whole wall surface to be painted by constructors, marking a crack and an empty drum part, repairing the crack by repair liquid, simultaneously removing solid mortar covered on the empty drum part, filling the empty drum part by using filling mortar, and polishing the repaired part to be flush with the wall surface;
s2: cleaning a base layer, namely cleaning the wall surface once by using clean water, then cleaning by using 3% caustic soda solution, and finally cleaning by using clean water;
s3: batch-coating putty, when the wall surface is dried to the water content of the base layer of 5-10%, painting a first flexible anti-cracking putty to level, wherein the painting thickness is 0.1-0.3mm, and after the first flexible anti-cracking putty is completely dried, painting a second flexible anti-cracking putty, wherein the painting thickness is 0.2-0.7 mm;
s4: cleaning putty, namely selecting 80-100 meshes of sand skin after the second putty is completely dried, polishing the surface of the whole putty layer in the same direction from top to bottom by using the sand skin, and cleaning floating ash and dust on the surface of the putty layer after polishing is finished;
s5: brushing a primer, namely selecting an alkali-resistant seal primer, brushing the primer along the sanding direction of the sand skin, and constructing by using a long-hair roller;
s6: brushing the primer surfacer, namely selecting the elastic primer surfacer, and brushing the primer surfacer after the primer is completely dried;
s7: and (4) brushing finish paint, namely selecting waterproof elastic finish paint, and brushing the finish paint after the intermediate paint is completely dried.
By adopting the technical scheme, the method has the following beneficial effects: firstly, detecting an attachment surface, namely a base layer, repairing cracks and hollows at the surface of the base layer, not only preventing the cracks and hollows from influencing the bonding of putty and the base layer, but also preventing stress from acting on the putty layer due to the continuous development of the cracks and hollows to cause cracks or local deformation of the putty layer and further damage to a coating layer; removing oil stains and sundries by cleaning the base layer, and preventing the oil stains and the sundries from damaging the adhesion of the putty and the base layer, wherein the putty which is not adhered to the base layer applies stress to a coating layer adhered to the putty under the action of self gravity, so that cracks are caused; coating a base layer with flexible anti-cracking putty, brushing the base layer with alkali-resistant seal primer, brushing the primer with elastic intermediate coat paint, and brushing the intermediate coat paint with waterproof elastic finish paint to form an outer wall decoration layer structure, and reducing the probability of cracks on the surface of the outer wall by selecting coating materials with excellent flexibility, elasticity and anti-cracking performance; fourthly, the primer can be better bonded with the putty by unifying the primer rolling brushing direction and the putty surface polishing direction, so that the subsequent brushing quality is improved, and further, the crack caused by poor bonding is avoided, and the anti-cracking effect is improved.
In some embodiments, the open air construction environment has a temperature of 5-40 ℃ and a humidity of 15-80%.
By adopting the technical scheme, too low temperature or too high temperature can influence the performance and coating bonding performance of the putty and the coating, and too low humidity or too high humidity can influence the drying and bonding of the putty and the coating after coating, so that proper weather is selected for construction, and the influence on construction quality due to environmental factors is avoided.
In some embodiments, in S1, the constructor uses an ultrasonic detector to detect the wall surface and marks the cracks and hollows with paint.
By adopting the technical scheme, the cracks existing in the base layer not only can influence the bonding of the putty, but also can further expand the cracks due to the fact that the outer wall is exposed in the natural environment for a long time, stress is applied to the putty and the paint painted on the putty to cause the cracks, therefore, the ultrasonic detector is utilized to accurately detect the defects of the surface to be painted and mark the defects, construction personnel can conveniently perform subsequent unified treatment, the construction speed is accelerated, and the construction quality is improved.
In some embodiments, in S1, the repair liquid is a mixture of a reinforcing agent and a binder, and the ratio of the reinforcing agent to the binder is 2:1-4: 1.
By adopting the technical scheme, the reinforcing agent and the binder are selected for mixing, the permeation of the reinforcing agent is fully utilized to enter the crack, the crack can be filled, and the reinforcing agent can permeate into the base layer around the crack from the crack, so that the hidden danger of the crack continuing to expand is eliminated; the mixed binder can be used for filling cracks of the main voucher, and can also improve the bonding strength of the repaired part and the outer wall base layer, namely the integrity of the repaired part and the outer wall base layer.
In some embodiments, the binder is a mixture of 108 glue and water, and the ratio of 108 glue to water is 1:3-1: 5.
by adopting the technical scheme, the 108-adhesive has stable viscosity, strong bonding capability, mildew resistance and strong alkali resistance, and has good compatibility with water, after the 108-adhesive is mixed with water and then mixed with a reinforcing agent to permeate into cracks of the outer wall, the service life of the repaired part can be prolonged, the construction quality is ensured, and the cracks are prevented from continuing to expand after the 108-adhesive is used in a natural environment for a long time.
In some embodiments, in S1, the filling mortar is a mixture of a and B, where a includes the following components in parts by weight: 30-40 parts of cement, 300 parts of river sand 200-containing material, 5-10 parts of SBS short fiber and 240 parts of water 210-containing material, wherein the component B comprises the following components in parts by weight: 40-60 parts of epoxy structural adhesive.
By adopting the technical scheme, the filling mortar mixed with SBS short fiber and epoxy structural adhesive is used for filling the hollowing part on the outer wall base layer, so that the phenomenon that the connection between the putty and the hollowing part is loosened, and the coating part painted on the putty cracks or even peels off is avoided.
In some embodiments, in S3, the wall surface is dried, then the interfacial agent is applied, and then the flexible anti-crack putty is applied.
By adopting the technical scheme, the interfacial agent is coated on the surface of the outer wall base layer, so that the bonding capacity of the putty and the outer wall base layer is improved, the base layer can be prevented from alkali return, and the situation that the base layer excessively absorbs moisture in the putty to influence the bonding strength between the base layer and the putty can be avoided.
In some embodiments, in S3, the flexible crack resistant putty is a mixture of C and D, where C includes the following components in parts by weight: 19-23 parts of styrene-acrylic emulsion, 0.8-1.6 parts of functional auxiliary agent and 5-20 parts of water, wherein the component D comprises the following components in parts by weight: 10-25 parts of white cement, 25-45 parts of nano calcium carbonate and 0.3-0.5 part of cellulose ether.
By adopting the technical scheme, the flexible anti-cracking putty is selected for painting the base layer, and compared with common putty, the flexible anti-cracking putty has better adhesion performance, durability and leveling anti-cracking capability, and avoids the phenomenon that the coating layer cracks due to the fact that stress acts on the coating layer due to the cracks generated by the putty.
In some embodiments, the functional aid includes 0.2 to 0.4 parts of a shrinkage reducing agent, 0.2 to 0.4 parts of a dispersant, 0.2 to 0.4 parts of a thickener, and 0.2 to 0.4 parts of a leveling agent.
By adopting the technical scheme, the addition of the shrinkage reducing agent can reduce the dry shrinkage at the later stage of the putty, the phenomenon that the coating layer is damaged due to the deformation of the putty is further avoided, the smoothness of the putty after the completion of batch scraping can be ensured by the addition of the leveling agent, the bonding performance of the follow-up coating and the putty is improved, the quality of the putty can be improved by the doping of the thickening agent and the dispersing agent, and the use performance of the putty is improved.
In some embodiments, said D further incorporates 0.2 to 0.4 parts of a water repellent.
Through adopting above-mentioned technical scheme, the doping of waterproofing agent can avoid the rainwater to permeate in the outer wall basic unit, improves construction quality.
In summary, compared with the prior art, the invention has the following advantages:
1. the outer wall decoration layer is formed by repairing the base layer, blending high-quality flexible anti-cracking putty and matching with the optimal coating, so that the anti-cracking effect of the painting process is improved, and the construction quality is improved;
2. by unifying the putty polishing direction and the primer painting direction, the bonding strength of the primer and the putty is improved, the probability of crack generation is reduced, and the construction quality is improved.
Detailed Description
Example 1:
an external wall coating anti-cracking painting process comprises the following steps:
s1: repairing a base layer, namely detecting the whole wall surface to be painted by a constructor by using an ultrasonic detector, uniformly repairing cracks through a repairing liquid after the cracks and the hollows are marked by using pigments, simultaneously, removing solid mortar covered on the hollows, filling the hollows by using filling mortar, and polishing the repaired part to be flush with the wall surface;
the repairing liquid is a mixture of a reinforcing agent and a binder, the ratio of the reinforcing agent to the binder is 2:1, the reinforcing agent is a concrete mortar surface reinforcing agent jointly manufactured by Beijing sea rock Xingye concrete admixture company Limited and Yunnan Kunming Baiyi building material manufacturing company Limited, and the binder is 108 glue produced by Huabei chemical industry Limited company in Ningchun city;
wherein the binder is a mixture of 108 glue and water, and the ratio of 108 glue to water is 1: 3;
the filling mortar is a mixture of A and B, wherein A comprises the following components in parts by weight: 30 parts of cement, 200 parts of river sand, 5 parts of SBS short fiber and 210 parts of water, wherein the component B comprises the following components in parts by weight: and 40 parts of epoxy structural adhesive.
S2: cleaning the base layer, namely cleaning the wall surface once with clear water, then cleaning with 3% caustic soda solution, and finally cleaning with clear water.
S3: scraping putty, coating an interface agent when the water content of a base layer is 5% after the wall surface is dried, painting a first flexible anti-crack putty and leveling after the interface agent is completely dried, wherein the painting thickness is 0.1mm, and painting a second flexible anti-crack putty after the first flexible anti-crack putty is completely dried, wherein the painting thickness is 0.2 mm;
wherein the interfacial agent is an interfacial agent of Shandong Jingfeng novel building materials Co., Ltd;
the flexible anti-cracking putty is a mixture of C and D, wherein the C comprises the following components in parts by weight: 19 parts of styrene-acrylic emulsion, 0.8 part of functional auxiliary agent and 5 parts of water, wherein the component D comprises the following components in parts by weight: 10 parts of white cement, 25 parts of nano calcium carbonate and 0.3 part of cellulose ether; the cellulose ether is HPMC, the functional assistant comprises 0.2 part of shrinkage reducing agent, 0.2 part of dispersing agent, 0.24 part of thickening agent and 0.2 part of leveling agent, and meanwhile, 0.2 part of waterproof agent is also mixed in the D.
S4: and (3) cleaning putty, selecting 80-mesh sand skin after the second putty is completely dried, polishing the surface of the whole putty layer in the same direction by using the sand skin from top to bottom, and cleaning floating ash and dust on the surface of the putty layer after polishing.
S5: and (3) brushing a primer, namely selecting an alkali-resistant seal primer of Wuhanao decorative coating Co., Ltd, brushing the primer along the sanding direction, and constructing by using a long-hair roller.
S6: brushing the primer surfacer, namely selecting the Zondon M-02 elastic primer surfacer of Guangxi Zhangbao investment Limited company, and brushing the primer surfacer after the primer is completely dried.
S7: and (4) painting finish, namely selecting waterproof elastic finish of Nippon QB655, and painting the finish after the intermediate coat is completely dried.
Example 2:
an external wall coating anti-cracking painting process comprises the following steps:
s1: repairing a base layer, namely detecting the whole wall surface to be painted by a constructor by using an ultrasonic detector, uniformly repairing cracks through a repairing liquid after the cracks and the hollows are marked by using pigments, simultaneously, removing solid mortar covered on the hollows, filling the hollows by using filling mortar, and polishing the repaired part to be flush with the wall surface;
the repairing liquid is a mixture of a reinforcing agent and a binder, the ratio of the reinforcing agent to the binder is 3:1, the reinforcing agent is a concrete mortar surface reinforcing agent jointly manufactured by Beijing sea rock Xingye concrete admixture company Limited and Yunnan Kunming Baiyi building material manufacturing company Limited, and the binder is 108 glue produced by Huabei chemical industry Limited company in Ningchun city;
wherein the binder is a mixture of 108 glue and water, and the ratio of 108 glue to water is 1: 4;
the filling mortar is a mixture of A and B, wherein A comprises the following components in parts by weight: 35 parts of cement, 250 parts of river sand, 8 parts of SBS short fiber and 230 parts of water, wherein the component B comprises the following components in parts by weight: 50 parts of epoxy structural adhesive.
S2: cleaning the base layer, namely cleaning the wall surface once with clear water, then cleaning with 3% caustic soda solution, and finally cleaning with clear water.
S3: scraping putty, coating an interface agent when the water content of the base layer is 7% after the wall surface is dried, painting a first flexible anti-crack putty and leveling after the interface agent is completely dried, wherein the painting thickness is 0.2mm, and painting a second flexible anti-crack putty after the first flexible anti-crack putty is completely dried, wherein the painting thickness is 0.4 mm;
wherein the interfacial agent is an interfacial agent of Shandong Jingfeng novel building materials Co., Ltd;
the flexible anti-cracking putty is a mixture of C and D, wherein the C comprises the following components in parts by weight: 21 parts of styrene-acrylic emulsion, 1.2 parts of functional auxiliary agent and 10 parts of water, wherein the component D comprises the following components in parts by weight: 18 parts of white cement, 35 parts of nano calcium carbonate and 0.4 part of cellulose ether; the cellulose ether is HPMC, the functional assistant comprises 0.3 part of shrinkage reducing agent, 0.3 part of dispersing agent, 0.3 part of thickening agent and 0.3 part of leveling agent, and meanwhile, 0.3 part of waterproof agent is also mixed in the D.
S4: and (3) cleaning putty, selecting 90-mesh sand skin after the second putty is completely dried, polishing the surface of the whole putty layer in the same direction by using the sand skin from top to bottom, and cleaning floating ash and dust on the surface of the putty layer after polishing.
S5: and (3) brushing a primer, namely selecting an alkali-resistant seal primer of Wuhanao decorative coating Co., Ltd, brushing the primer along the sanding direction, and constructing by using a long-hair roller.
S6: brushing the primer surfacer, namely selecting the Zondon M-02 elastic primer surfacer of Guangxi Zhangbao investment Limited company, and brushing the primer surfacer after the primer is completely dried.
S7: and (4) painting finish, namely selecting waterproof elastic finish of Nippon QB655, and painting the finish after the intermediate coat is completely dried.
Example 3:
an external wall coating anti-cracking painting process comprises the following steps:
s1: repairing a base layer, namely detecting the whole wall surface to be painted by a constructor by using an ultrasonic detector, uniformly repairing cracks through a repairing liquid after the cracks and the hollows are marked by using pigments, simultaneously, removing solid mortar covered on the hollows, filling the hollows by using filling mortar, and polishing the repaired part to be flush with the wall surface;
the repairing liquid is a mixture of a reinforcing agent and a binder, the ratio of the reinforcing agent to the binder is 4:1, the reinforcing agent is a concrete mortar surface reinforcing agent jointly manufactured by Beijing sea rock Xingye concrete admixture company Limited and Yunnan Kunming Baiyi building material manufacturing company Limited, and the binder is 108 glue produced by Huabei chemical industry Limited company in Ningchun city;
wherein the binder is a mixture of 108 glue and water, and the ratio of 108 glue to water is 1: 5;
the filling mortar is a mixture of A and B, wherein A comprises the following components in parts by weight: 40 parts of cement, 300 parts of river sand, 10 parts of SBS short fiber and 240 parts of water, wherein the component B comprises the following components in parts by weight: 60 parts of epoxy structural adhesive.
S2: cleaning the base layer, namely cleaning the wall surface once with clear water, then cleaning with 3% caustic soda solution, and finally cleaning with clear water.
S3: scraping putty, coating an interface agent when the water content of a base layer is 10% after the wall surface is dried, painting a first flexible anti-crack putty and leveling after the interface agent is completely dried, wherein the painting thickness is 0.3mm, and painting a second flexible anti-crack putty after the first flexible anti-crack putty is completely dried, wherein the painting thickness is 0.7 mm;
wherein the interfacial agent is an interfacial agent of Shandong Jingfeng novel building materials Co., Ltd;
the flexible anti-cracking putty is a mixture of C and D, wherein the C comprises the following components in parts by weight: 23 parts of styrene-acrylic emulsion, 1.6 parts of functional auxiliary agent and 50 parts of water, wherein the component D comprises the following components in parts by weight: 58 parts of white cement, 75 parts of nano calcium carbonate and 0.5 part of cellulose ether; the cellulose ether is HPMC, the functional assistant comprises 0.4 part of shrinkage reducing agent, 0.4 part of dispersing agent, 0.4 part of thickening agent and 0.4 part of leveling agent, and meanwhile, 0.4 part of waterproof agent is also mixed in the D.
S4: and (3) cleaning putty, namely selecting 100-mesh sand skin after the second putty is completely dried, polishing the surface of the whole putty layer in the same direction by using the sand skin from top to bottom, and cleaning floating ash and dust on the surface of the putty layer after polishing.
S5: and (3) brushing a primer, namely selecting an alkali-resistant seal primer of Wuhanao decorative coating Co., Ltd, brushing the primer along the sanding direction, and constructing by using a long-hair roller.
S6: brushing the primer surfacer, namely selecting the Zondon M-02 elastic primer surfacer of Guangxi Zhangbao investment Limited company, and brushing the primer surfacer after the primer is completely dried.
S7: and (4) painting finish, namely selecting waterproof elastic finish of Nippon QB655, and painting the finish after the intermediate coat is completely dried.
When the plastering process disclosed in the embodiment is used for construction, the obtained outer wall decorative layer has good decoration and high flatness, and is inspected by taking a half year as a period, so that the cracks are few, wherein the plastering process disclosed in the embodiment 2 has the best anti-cracking effect.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (9)
1. An outer wall coating anti-cracking painting process is characterized by comprising the following steps:
s1: repairing a base layer, namely detecting the whole wall surface to be painted by constructors, marking a crack and an empty drum part, repairing the crack by repair liquid, simultaneously removing solid mortar covered on the empty drum part, filling the empty drum part by using filling mortar, and polishing the repaired part to be flush with the wall surface;
s2: cleaning a base layer, namely cleaning the wall surface once by using clean water, then cleaning by using 3% caustic soda solution, and finally cleaning by using clean water;
s3: and (2) batch putty scraping, when the wall surface is dried to the water content of the base layer of 5-10%, painting a first flexible anti-cracking putty to level, wherein the painting thickness is 0.1-0.3mm, and after the first flexible anti-cracking putty is completely dried, painting a second flexible anti-cracking putty, wherein the painting thickness is 0.2-0.7mm, the flexible anti-cracking putty is a mixture of C and D, and the C comprises the following components in parts by weight: 19-23 parts of styrene-acrylic emulsion, 0.8-1.6 parts of functional auxiliary agent and 5-20 parts of water, wherein the component D comprises the following components in parts by weight: white cement 10-25 parts, nano calcium carbonate 25-45 parts, cellulose ether 0.3-0.5 part;
s4: cleaning putty, namely selecting 80-100 meshes of sand skin after the second putty is completely dried, polishing the surface of the whole putty layer in the same direction from top to bottom by using the sand skin, and cleaning floating ash and dust on the surface of the putty layer after polishing is finished;
s5: brushing a primer, namely selecting an alkali-resistant seal primer, brushing the primer along the sanding direction of the sand skin, and constructing by using a long-hair roller;
s6: brushing the primer surfacer, namely selecting the elastic primer surfacer, and brushing the primer surfacer after the primer is completely dried;
s7: and (4) brushing finish paint, namely selecting waterproof elastic finish paint, and brushing the finish paint after the intermediate paint is completely dried.
2. The exterior wall coating anti-cracking painting process of claim 1, wherein the open construction environment temperature is 5-40 ℃ and the humidity is 15-80%.
3. The exterior wall coating anti-cracking plastering process of claim 1, wherein in S1, a constructor uses an ultrasonic detector to detect the wall surface and marks the crack and the empty drum part with pigment.
4. The exterior wall coating anti-cracking plastering process of claim 1, wherein in S1, the repair liquid is a mixture of a reinforcing agent and a binder, and the ratio of the reinforcing agent to the binder is 2:1-4: 1.
5. The exterior wall coating anti-cracking painting process according to claim 4, wherein the binder is a mixture of 108 glue and water, and the ratio of the 108 glue to the water is 1:3-1: 5.
6. The exterior wall coating cracking-resistant painting process of claim 1, wherein in S1, the filling mortar is a mixture of A and B, wherein A comprises the following components in parts by weight: 30-40 parts of cement, 300 parts of river sand 200-containing material, 5-10 parts of SBS short fiber and 240 parts of water 210-containing material, wherein the component B comprises the following components in parts by weight: 40-60 parts of epoxy structural adhesive.
7. The exterior wall coating anti-cracking plastering process of claim 1, wherein in S3, after the wall surface is dried, the interfacial agent is coated, and then the flexible anti-cracking putty is plastered.
8. The exterior wall coating anti-cracking painting process of claim 1, wherein the functional auxiliary comprises 0.2-0.4 part of shrinkage reducing agent, 0.2-0.4 part of dispersing agent, 0.2-0.4 part of thickening agent and 0.2-0.4 part of leveling agent.
9. The exterior wall coating anti-cracking plastering process as claimed in claim 1, wherein 0.2-0.4 part of a waterproof agent is further added into the D.
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| CN109868954B (en) * | 2019-03-18 | 2020-08-11 | 广州市第四装修有限公司 | Indoor decoration method for house roof |
| CN110424651B (en) * | 2019-07-31 | 2020-11-24 | 深圳市惠深博越智慧建造科技有限公司 | Environment-friendly exterior wall coating construction process |
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| CN110670824A (en) * | 2019-08-22 | 2020-01-10 | 安徽润安景汇建筑工程有限公司 | Coating painting construction process |
| CN111021556B (en) * | 2019-12-25 | 2021-06-15 | 成都金谷景观工程有限公司 | Construction method for preventing alkali reversion of wall |
| CN111548665A (en) * | 2020-05-25 | 2020-08-18 | 苏州红泥新材料科技有限公司 | Impregnation curing strengthening coating, paint and preparation method |
| CN111877593A (en) * | 2020-07-02 | 2020-11-03 | 四川标鼎建筑材料有限公司 | Anti-cracking construction method for firewall |
| CN111677330A (en) * | 2020-07-08 | 2020-09-18 | 海南红杉科创实业有限公司 | Building outer wall cracking maintenance method |
| CN112065087A (en) * | 2020-08-01 | 2020-12-11 | 秋尊(上海)设计装饰工程有限公司 | Indoor wall surface renovation decoration process |
| CN114370147A (en) * | 2022-02-10 | 2022-04-19 | 江苏威亚达建设有限公司 | External wall spraying construction process with high smoothness |
| CN114934644A (en) * | 2022-06-10 | 2022-08-23 | 徐州腾美建筑装饰工程有限公司 | 5M construction process for building exterior wall decorative coating |
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Denomination of invention: A Cracking Prevention Painting Process for Exterior Wall Coatings Effective date of registration: 20231012 Granted publication date: 20200710 Pledgee: Agricultural Bank of China Limited Taishun County sub branch Pledgor: ZHEJIANG LUYU DECORATION Co.,Ltd. Registration number: Y2023330002301 |