CN112431434A - Fiber cement sheet hole patching process - Google Patents
Fiber cement sheet hole patching process Download PDFInfo
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- CN112431434A CN112431434A CN202011369509.5A CN202011369509A CN112431434A CN 112431434 A CN112431434 A CN 112431434A CN 202011369509 A CN202011369509 A CN 202011369509A CN 112431434 A CN112431434 A CN 112431434A
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- powder
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0203—Arrangements for filling cracks or cavities in building constructions
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/34—Filling pastes
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Sealing Material Composition (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to the technical field of a plate hole patching process, and discloses a fiber cement sheet hole patching process, which comprises the following steps: a. preparing putty powder, wherein the powder consists of the following components in percentage by mass: 36-44% of cement, 54-62% of heavy calcium carbonate powder, 0.8-1.6% of rubber powder, 0.2-1.2% of methyl cellulose and uniformly mixing powder materials to prepare putty powder; b. preparing a putty emulsion: uniformly mixing the VAE emulsion and water according to the volume ratio of 0.5-1.5 to prepare putty emulsion; c. preparing putty slurry: preparing putty slurry I and putty slurry II; d. hole patching: filling the putty slurry I into the hole in the fiber cement sheet, scraping for the first time, aligning the putty slurry II with the hole position after drying, scraping for the second time, and completing hole repairing after drying after scraping for the second time. The process has the advantages of low cost for hole filling of the fiber cement sheet, consistent hardness and expansion and contraction coefficient of the filler in the hole with those of the fiber cement sheet, stable bonding between the filler and the hole wall, difficult falling and better stability.
Description
Technical Field
The invention relates to the technical field of a plate hole patching process, in particular to a fiber cement sheet hole patching process.
Background
Along with the continuous development of the building industry, more and more building surface wall surfaces all adopt decorative boards, the decorative boards are attractive and elegant, and a plurality of heat-insulating decorative boards also have good heat-insulating performance. The main part of decorative board all adopts the fiber cement sheet metal usually, opens counter bore, connection fastener on the fiber cement sheet metal, then mends the hole and levels, makes pattern, line etc. on the front, and the fastener is fixed with the fossil fragments on the building outer wall face. However, after the fiber cement sheet is punched, although the holes can be filled with the slurry (putty) subsequently, the slurry has different cohesiveness, hardness and expansion coefficient from the original fiber cement sheet, so that gaps are easily generated at the edges of the subsequent holes, or the decorative effect is influenced because the expansion coefficient difference causes the peripheries of the holes and the top surfaces of the holes to be protruded. Therefore, in the prior art, the hole is usually repaired by directly adopting the slurry made of the same material as the fiber cement sheet and the same process, namely, the slurry is filled and scraped, and then the extrusion and high-pressure steam curing processes are carried out, so that the strength, density, expansion coefficient and hardness of the filler in the hole can be ensured to be good with the consistency of the fiber cement sheet, but the extrusion and high-pressure steam curing processes are complex and high in cost, and when the filler in the hole is treated by adopting the process, the fiber cement sheet can be subjected to secondary treatment (extrusion and high-pressure steam curing), so that the performance of the fiber cement sheet is influenced.
Disclosure of Invention
The invention aims to solve the problems of the fiber cement thin plate hole patching process in the prior art, and provides the fiber cement thin plate hole patching process which is convenient to operate and low in cost, does not damage the fiber cement thin plate, has good consistency of the hardness and the thermal expansion coefficient of fillers in holes and the fiber cement thin plate, and is stable and reliable in connection of the fillers in the holes and the fiber cement thin plate.
In order to achieve the purpose, the invention adopts the following technical scheme:
a fiber cement sheet hole patching process comprises the following steps: a. preparing putty powder, wherein the powder consists of the following components in percentage by mass: 36-44% of cement, 54-62% of heavy calcium carbonate powder, 0.8-1.6% of rubber powder and 0.2-1.2% of methyl cellulose, and the above powder materials are uniformly mixed to prepare putty powder; b. Preparing a putty emulsion: uniformly mixing the VAE emulsion and water according to the volume ratio of 0.5-1.5 to prepare putty emulsion; c. preparing putty slurry: uniformly mixing putty powder and quartz sand powder according to the mass ratio of 0.8-0.98 to prepare filling powder I, and uniformly mixing the filling powder I and putty emulsion according to the mass ratio of 3.6-4.2 to prepare putty slurry I; uniformly mixing putty powder and quartz sand powder according to the mass ratio of 1.6-2.2 to prepare filling powder II, and uniformly mixing the filling powder II and putty emulsion according to the mass ratio of 3.8-4.6 to prepare putty slurry II; d. hole patching: filling the putty slurry I into the holes in the fiber cement thin plate, performing primary scraping, after drying, aligning the putty slurry II with the hole positions, performing secondary scraping, and after secondary scraping, finishing hole repairing after natural drying. The core components of the filler in the hole are cement, coarse whiting powder and quartz sand powder, and are relatively close to the core components of the fiber cement sheet, so that the coefficient of expansion with heat and contraction with cold of the filler (a product obtained after drying the putty slurry) in the hole is very close to the coefficient of expansion with heat and contraction with cold of the fiber cement sheet, and cracks are not easy to generate between the filler in the hole and the hole wall; meanwhile, the filler in the hole is high in hardness, wear-resistant and not easy to dent after being dried; the VAE emulsion is vinyl acetate-ethylene copolymer emulsion, the rubber powder is dispersible latex powder, and can be dispersed into vinyl acetate-ethylene copolymer when meeting water, so that when the filling powder (filling powder I and filling powder II) is mixed with the putty emulsion to form putty slurry (putty slurry I and putty slurry II), the filling powder and the putty emulsion are mixed very uniformly under the action of the rubber powder and the VAE emulsion, so that various particles in the putty slurry are uniformly distributed and not layered, and the putty slurry is dried to form solid with uniform components, uniform density and uniform coefficients of thermal expansion and cold contraction at different parts; the VAE emulsion is an adhesive, so that the adhesion of each particle in the putty slurry is stable, and the adhesion of the putty slurry and the hole wall is stable; the methyl cellulose has excellent thickening property, dispersibility and cohesiveness, can increase the thickening property of the putty slurry, prevent the sedimentation of particles and keep the uniformity of the particles, and the methyl cellulose and the VAE emulsion can enhance the toughness of the filler in the hole after being cured, so that the methyl cellulose and the VAE emulsion can be used for compensating the difference of coefficients of expansion with heat and contraction with cold between the filler in the hole and a fiber cement sheet, and can also prevent the putty slurry from cracking in the drying process. After the fiber cement sheet is subjected to hole patching by the process, the density, hardness and coefficient of expansion with heat and contraction with cold of the filler in the hole are consistent with those of the fiber cement sheet without extrusion and high-pressure steam curing processes, the bonding between the filler in the hole and the hole wall is very stable and is not easy to fall off, and the cost of the fiber cement sheet by the process is lower.
Preferably, the putty powder is prepared by mixing the following components in percentage by mass: 38-42% of cement, 56-60% of heavy calcium powder, 1.1-1.3% of tile rubber powder and 0.4-0.8% of methyl cellulose.
Preferably, the putty powder is prepared by mixing the following components in percentage by mass: 40% of cement, 58.2% of heavy calcium powder, 1.2% of tile rubber powder and 0.6% of methyl cellulose.
Preferably, in the step b, the VAE emulsion and water are uniformly mixed according to the volume ratio of 1 to prepare the putty emulsion.
Preferably, in the step c, the putty powder and the quartz sand powder are uniformly mixed according to the mass ratio of 0.9 to prepare filling powder I, and the filling powder I and the putty emulsion are uniformly mixed according to the mass ratio of 3.8 to prepare putty slurry I; and uniformly mixing the putty powder and the quartz sand powder according to the mass ratio of 2 to prepare filling powder II, and uniformly mixing the filling powder II and the putty emulsion according to the mass ratio of 4.2 to prepare putty slurry II.
Preferably, the drying time after the first scraping in the step d is 6-8h, and the drying temperature is 15-25 ℃; the drying time after the second batch scraping is 8-12h, and the drying temperature is 10-15 ℃. The water content of the putty slurry I is higher than that of the putty slurry II; the drying temperature after one-time scraping is increased, the time is shortened, the putty slurry I shrinks after being dried, at the moment, the solid filler formed in the hole is approximately in a truncated cone-shaped structure and has high hardness, a tiny gap can be formed between the solid filler and the wall of the hole, and the height of the top surface of the fixed filler is slightly lower than that of the hole; after the secondary scraping, putty thick liquids II are filled into clearance and top surface department around the fixed filler of round platform shape, then through reducing drying temperature, prolong drying time, make the solid filler that II dry curing of putty thick liquids of secondary scraping formed more compact, difficult fracture, because the content of quartz sand powder in putty thick liquids II is higher than the quartz sand powder in putty thick liquids I, the hardness is higher after I dry curing of putty thick liquids, the cohesiveness after II dry curing of putty thick liquids, toughness is better, putty thick liquids II are located between the fixed filler of round platform shape and the pore wall, compensate the deformation volume difference that coefficient difference brought of thermal contraction expends between the two.
Preferably, after the secondary scraping and drying, the front surface of the fiber cement sheet is polished to be flat.
Preferably, the molecular weight of the methylcellulose in the putty powder is 35000-45000.
Therefore, the hole patching process is convenient to operate and low in cost, the fiber cement thin plate cannot be damaged, the consistency of the hardness and the thermal expansion coefficient of the filler in the hole and the fiber cement thin plate is good, and the filler in the hole and the fiber cement thin plate are stably and reliably connected.
Detailed Description
The invention is further described below with reference to specific embodiments:
example 1: a fiber cement sheet hole patching process comprises the following steps: a. preparing putty powder, wherein the powder consists of the following components in percentage by mass: 36% of cement, 62% of heavy calcium powder, 1.6% of wacker rubber powder and 0.4% of methyl cellulose, wherein the powder materials are uniformly mixed to prepare putty powder, and the molecular weight of the methyl cellulose in the putty powder is 35000; b. Preparing a putty emulsion: uniformly mixing the VAE emulsion and water according to the volume ratio of 0.5 to prepare putty emulsion; c. preparing putty slurry: uniformly mixing putty powder and quartz sand powder according to a mass ratio of 0.8 to prepare filling powder I, and uniformly mixing the filling powder I and the putty emulsion according to a mass ratio of 3.6 to prepare putty slurry I; uniformly mixing putty powder and quartz sand powder according to the mass ratio of 1.6 to prepare filling powder II, and uniformly mixing the filling powder II and the putty emulsion according to the mass ratio of 3.8 to prepare putty slurry II; d. hole patching: filling the putty slurry I into holes in the fiber cement sheet, performing primary scraping, wherein the drying time after the primary scraping is 8 hours, the drying temperature is 25 ℃, aligning the putty slurry II to the hole site after drying, performing secondary scraping, the drying time after the secondary scraping is 12 hours, the drying temperature is 15 ℃, completing hole filling after drying after the secondary scraping, and finally polishing the front surface of the fiber cement sheet to be flat.
Example 2: a fiber cement sheet hole patching process comprises the following steps: a. preparing putty powder, wherein the powder consists of the following components in percentage by mass: 44% of cement, 54% of heavy calcium powder, 0.8% of tile glue powder and 1.2% of methyl cellulose, wherein the molecular weight of the methyl cellulose in the putty powder is 45000; b. Preparing a putty emulsion: uniformly mixing the VAE emulsion and water according to the volume ratio of 1.5 to prepare putty emulsion; c. preparing putty slurry: uniformly mixing putty powder and quartz sand powder according to the mass ratio of 0.98 to prepare filling powder I, and uniformly mixing the filling powder I and the putty emulsion according to the mass ratio of 4.2 to prepare putty slurry I; uniformly mixing putty powder and quartz sand powder according to the mass ratio of 2.2 to prepare filling powder II, and uniformly mixing the filling powder II and the putty emulsion according to the mass ratio of 4.6 to prepare putty slurry II; d. hole patching: filling the putty slurry I into holes in the fiber cement sheet, performing primary scraping, wherein the drying time after the primary scraping is 6 hours, the drying temperature is 15 ℃, aligning the putty slurry II to the hole site after drying, performing secondary scraping, wherein the drying time after the secondary scraping is 8 hours, the drying temperature is 10 ℃, completing hole filling after drying after the secondary scraping, and finally polishing the front surface of the fiber cement sheet to be flat.
Example 3: a fiber cement sheet hole patching process comprises the following steps: a. preparing putty powder, wherein the powder consists of the following components in percentage by mass: 42% of cement, 57% of heavy calcium powder, 0.8% of rubber powder and 0.2% of methyl cellulose, wherein the molecular weight of the methyl cellulose in the putty powder is 40000; b. Preparing a putty emulsion: uniformly mixing the VAE emulsion and water according to the volume ratio of 1 to prepare putty emulsion; c. preparing putty slurry: uniformly mixing putty powder and quartz sand powder according to the mass ratio of 0.85 to prepare filling powder I, and uniformly mixing the filling powder I and the putty emulsion according to the mass ratio of 4 to prepare putty slurry I; uniformly mixing putty powder and quartz sand powder according to the mass ratio of 1.8 to prepare filling powder II, and uniformly mixing the filling powder II and the putty emulsion according to the mass ratio of 4.4 to prepare putty slurry II; d. hole patching: filling the putty slurry I into holes in the fiber cement sheet, performing primary scraping, wherein the drying time after the primary scraping is 7 hours, the drying temperature is 12 ℃, aligning the putty slurry II to the hole site after drying, performing secondary scraping, the drying time after the secondary scraping is 10 hours, the drying temperature is 13 ℃, completing hole filling after drying after the secondary scraping, and finally polishing the front surface of the fiber cement sheet to be flat.
Example 4: a fiber cement sheet hole patching process comprises the following steps: a. preparing putty powder, wherein the powder consists of the following components in percentage by mass: 40% of cement, 58.2% of heavy calcium powder, 1.2% of rubber powder, and 0.6% of methyl cellulose, wherein the molecular weight of the methyl cellulose in the putty powder is 40000; b. Preparing a putty emulsion: uniformly mixing the VAE emulsion and water according to the volume ratio of 1 to prepare putty emulsion; c. preparing putty slurry: uniformly mixing putty powder and quartz sand powder according to a mass ratio of 0.9 to prepare filling powder I, and uniformly mixing the filling powder I and the putty emulsion according to a mass ratio of 3.8 to prepare putty slurry I; uniformly mixing putty powder and quartz sand powder according to the mass ratio of 2 to prepare filling powder II, and uniformly mixing the filling powder II and the putty emulsion according to the mass ratio of 4.2 to prepare putty slurry II; d. hole patching: filling the putty slurry I into holes in the fiber cement sheet, performing primary scraping, wherein the drying time after the primary scraping is 7 hours, the drying temperature is 12 ℃, aligning the putty slurry II to the hole site after drying, performing secondary scraping, the drying time after the secondary scraping is 10 hours, the drying temperature is 13 ℃, completing hole filling after drying after the secondary scraping, and finally polishing the front surface of the fiber cement sheet to be flat.
Example 5: a fiber cement sheet hole patching process comprises the following steps: a. preparing putty powder, wherein the powder consists of the following components in percentage by mass: 38% of cement, 60% of heavy calcium powder, 1.3% of tile rubber powder and 0.7% of methyl cellulose, and the above powder materials are uniformly mixed to prepare putty powder; the remaining steps were the same as in example 4.
Example 6: a fiber cement sheet hole patching process comprises the following steps: a. preparing putty powder, wherein the powder consists of the following components in percentage by mass: 42% of cement, 56% of coarse whiting powder, 1.2% of tile glue powder and 0.8% of methyl cellulose, and the above powder materials are uniformly mixed to prepare putty powder; the remaining steps were the same as in example 4.
Example 7: a fiber cement sheet hole patching process comprises the following steps: a. preparing putty powder, wherein the powder consists of the following components in percentage by mass: 39% of cement, 59.5% of heavy calcium powder, 1.1% of tile glue powder and 0.4% of methyl cellulose, and the above powder materials are uniformly mixed to prepare putty powder; the remaining steps were the same as in example 4.
The cement types in the above examples all adopt 425 cement, the rubber powder in watt gram all adopts rubber powder in watt gram in Germany of VINNAPASS 5044N, and the VAE emulsion all adopts VAE-BJ-707 emulsion.
The process in the embodiment is used for repairing the holes of the fiber cement sheet, the density, hardness and coefficient of expansion with heat and contraction with cold of the filler in the holes can be consistent with those of the fiber cement sheet without extrusion and high-pressure steam curing processes, the bonding between the filler in the holes and the hole walls is very stable, the filler is not easy to fall off and crack, and the cost for repairing the holes of the fiber cement sheet is lower.
The above is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions or modifications made based on the present invention to solve the same technical problems and achieve the same technical effects are within the scope of the present invention.
Claims (8)
1. A fiber cement sheet hole patching process is characterized by comprising the following steps:
a. preparing putty powder, wherein the powder consists of the following components in percentage by mass: 36-44% of cement, 54-62% of heavy calcium carbonate powder, 0.8-1.6% of rubber powder and 0.2-1.2% of methyl cellulose, and the above powder materials are uniformly mixed to prepare putty powder;
b. preparing a putty emulsion: uniformly mixing the VAE emulsion and water according to the volume ratio of 0.5-1.5 to prepare putty emulsion;
c. preparing putty slurry: uniformly mixing putty powder and quartz sand powder according to the mass ratio of 0.8-0.98 to prepare filling powder I, and uniformly mixing the filling powder I and putty emulsion according to the mass ratio of 3.6-4.2 to prepare putty slurry I; uniformly mixing putty powder and quartz sand powder according to the mass ratio of 1.6-2.2 to prepare filling powder II, and uniformly mixing the filling powder II and putty emulsion according to the mass ratio of 3.8-4.6 to prepare putty slurry II;
d. hole patching: filling the putty slurry I into the hole in the fiber cement sheet, scraping for the first time, aligning the putty slurry II with the hole position after drying, scraping for the second time, and completing hole repairing after drying after scraping for the second time.
2. The fiber cement sheet pore-filling process as claimed in claim 1, wherein the putty powder is prepared by mixing the following components in percentage by mass: 38-42% of cement, 56-60% of heavy calcium powder, 1.1-1.3% of tile rubber powder and 0.4-0.8% of methyl cellulose.
3. The fiber cement sheet pore-filling process as claimed in claim 2, wherein the putty powder is prepared by mixing the following components in percentage by mass: 40% of cement, 58.2% of heavy calcium powder, 1.2% of tile rubber powder and 0.6% of methyl cellulose.
4. The process of claim 1, wherein in step b, the VAE emulsion and water are mixed uniformly in a volume ratio of 1 to form a putty emulsion.
5. The fiber cement sheet pore-filling process as claimed in claim 1, wherein in step c, the putty powder and the quartz sand powder are uniformly mixed according to the mass ratio of 0.9 to prepare filling powder I, and the filling powder I and the putty emulsion are uniformly mixed according to the mass ratio of 3.8 to prepare putty slurry I; and uniformly mixing the putty powder and the quartz sand powder according to the mass ratio of 2 to prepare filling powder II, and uniformly mixing the filling powder II and the putty emulsion according to the mass ratio of 4.2 to prepare putty slurry II.
6. The process of claim 1, wherein the drying time after the first scraping in step d is 6-8 hours, and the drying temperature is 15-25 ℃; the drying time after the second batch scraping is 8-12h, and the drying temperature is 10-15 ℃.
7. The process of claim 1, wherein the fiber cement sheet is sanded flat on its front side after the secondary doctoring and drying.
8. The process of claim 1, wherein the molecular weight of the methylcellulose in the putty powder is 35000-45000.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011369509.5A CN112431434B (en) | 2020-11-30 | 2020-11-30 | Fiber cement sheet hole patching process |
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| CN202011369509.5A CN112431434B (en) | 2020-11-30 | 2020-11-30 | Fiber cement sheet hole patching process |
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| CN112431434A true CN112431434A (en) | 2021-03-02 |
| CN112431434B CN112431434B (en) | 2022-02-18 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103132707A (en) * | 2011-12-02 | 2013-06-05 | 贵州中建建筑科研设计院有限公司 | Repairing method and structure for building wall crack |
| CN104860615A (en) * | 2015-03-27 | 2015-08-26 | 万华节能科技集团股份有限公司 | Mortar for concrete base surface repair, and preparation method thereof |
| CN106381937A (en) * | 2016-08-30 | 2017-02-08 | 中交第二航务工程局有限公司 | Concrete structured pre-buried hole repairing method |
| CN106830820A (en) * | 2017-01-05 | 2017-06-13 | 岑其挺 | A kind of cement base wall face bottom layer alignment material and preparation method |
| CN107324737A (en) * | 2017-08-01 | 2017-11-07 | 合肥广民建材有限公司 | A kind of concrete slab mending mortar and preparation method |
| CN108947419A (en) * | 2018-07-17 | 2018-12-07 | 广东复特新型材料科技有限公司 | A kind of dedicated mending mortar of structure and preparation method |
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2020
- 2020-11-30 CN CN202011369509.5A patent/CN112431434B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103132707A (en) * | 2011-12-02 | 2013-06-05 | 贵州中建建筑科研设计院有限公司 | Repairing method and structure for building wall crack |
| CN104860615A (en) * | 2015-03-27 | 2015-08-26 | 万华节能科技集团股份有限公司 | Mortar for concrete base surface repair, and preparation method thereof |
| CN106381937A (en) * | 2016-08-30 | 2017-02-08 | 中交第二航务工程局有限公司 | Concrete structured pre-buried hole repairing method |
| CN106830820A (en) * | 2017-01-05 | 2017-06-13 | 岑其挺 | A kind of cement base wall face bottom layer alignment material and preparation method |
| CN107324737A (en) * | 2017-08-01 | 2017-11-07 | 合肥广民建材有限公司 | A kind of concrete slab mending mortar and preparation method |
| CN108947419A (en) * | 2018-07-17 | 2018-12-07 | 广东复特新型材料科技有限公司 | A kind of dedicated mending mortar of structure and preparation method |
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| CN112431434B (en) | 2022-02-18 |
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