CN111440473A - Light environment-friendly exterior wall leveling putty and preparation method thereof - Google Patents
Light environment-friendly exterior wall leveling putty and preparation method thereof Download PDFInfo
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- CN111440473A CN111440473A CN202010457508.XA CN202010457508A CN111440473A CN 111440473 A CN111440473 A CN 111440473A CN 202010457508 A CN202010457508 A CN 202010457508A CN 111440473 A CN111440473 A CN 111440473A
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- Prior art keywords
- exterior wall
- leveling putty
- environment
- wall leveling
- friendly exterior
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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
Abstract
The invention discloses a light environment-friendly exterior wall leveling putty and a preparation method thereof, and the light environment-friendly exterior wall leveling putty consists of the following components in percentage by weight: 20-40% of cement, 50-70% of construction waste powder, 0.3-0.6% of water-retaining agent, 0.1-0.3% of water repellent, 1.0-3.0% of active carbon, 0.5-1.0% of triethanolamine, 1.0-3.0% of dust-free wood fiber, 4.0-8.0% of inorganic mineral fiber, 0.1-0.3% of slip agent, 1.0-3.0% of latex powder and 2.0-4.0% of pigment. The light environment-friendly leveling putty for the outer wall has the characteristics of smooth construction, good cracking resistance, light weight, environment friendliness and zero influence on ecology.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to light environment-friendly exterior wall leveling putty and a preparation method thereof.
Background
When developed countries are in urbanization and industrialization promotion projects, the resource recycling of construction waste is gradually paid attention to, and a lot of experiences related to the resource recycling of the construction waste are already accumulated through legislation and practice. At present, the recycling rate of the construction waste is 87% in Germany, 99% in Japan and 89% in America, nearly 100% in the Netherlands, but only few cities in China research the resource recycling of the construction waste, and the resource recycling of the construction waste in China just starts.
At present, the construction waste (garbage) is treated by the following two methods in foreign countries:
(1) the generated waste materials are directly disposed, processed and utilized on site in a construction site. This mode of handling should adopt the broken station of removal or semi-movable formula, nevertheless because the job site often is in urban area or resident concentration district, generally has higher to the environmental index (noise and dust pollution when being special), and can't handle the finished product of recovery.
(2) The construction waste is transported to a renewable resource treatment plant to be processed and treated in a centralized way. It is suitable to adopt large-scale complete treatment equipment with higher production efficiency, not only can achieve the purposes of removing impurities and grading processing, but also can well solve the problems of noise and powder bin pollution.
The construction waste is crushed and sieved to form three types of coarse aggregate, fine aggregate and superfine powder (the particle size is between 100 and 300 meshes), wherein the coarse and fine aggregate is generally used in concrete and ready-mixed mortar, and the superfine powder cannot be consumed due to the difficulty in application of the special property of the superfine powder.
Disclosure of Invention
Based on the above, the invention relates to light environment-friendly exterior wall leveling putty, which is characterized in that construction waste powder is used for replacing double-flying powder in the traditional putty, a large amount of ultrafine powder generated in the crushing process of the construction waste can be consumed, the utilization rate of the ultrafine powder reaches 100%, and the product has the characteristics of smooth construction, good cracking resistance, light weight, environment friendliness and zero influence on ecology.
In order to achieve the purpose, the invention adopts the technical scheme that:
the lightweight environment-friendly leveling putty for the outer wall comprises the following components in percentage by weight:
in a further scheme, the cement is general portland cement, and the strength grade is any one or more of 42.5, 42.5R, 52.5 and 52.5R.
In a further scheme, the construction waste powder is powder with the particle size of 100-300 meshes after the construction waste is crushed and sieved.
In a further scheme, the water retaining agent is one or more of hydroxyethyl methyl cellulose ether and hydroxypropyl methyl cellulose ether, the ash content is less than 3%, and the viscosity is 40000 and 100000 centipoises.
In a further scheme, the water repellent is an organic silicon water repellent or a stearic acid water repellent.
Further, the slip agent is SA-F produced by Zhejiang co-creation building materials science and technology Limited, and/or the dust-free wood fiber is produced by Germany JRS.
In a further scheme, the latex powder is redispersible latex powder.
In a further scheme, the inorganic mineral fiber is brucite fiber.
In a further scheme, the pigment is an iron oxide series pigment.
The technical scheme adopted by the invention is as follows: a preparation method of light environment-friendly exterior wall leveling putty comprises the steps of accurately weighing cement, construction waste powder, a water-retaining agent, a water repellent, active carbon, triethanolamine, dust-free wood fiber, inorganic mineral fiber, a slip agent, latex powder and pigment according to weight percentage, adding the weighed materials into a stirrer, stirring uniformly and packaging to obtain the light environment-friendly exterior wall leveling putty.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
1. the invention relates to a light environment-friendly exterior wall leveling putty, which replaces double flying powder in the traditional putty with construction waste powder, can greatly consume ultrafine powder generated in the crushing process of construction waste, and has the utilization rate of 100 percent.
2. According to the light environment-friendly exterior wall leveling putty, the activated carbon and the dust-free wood fiber are further added on the basis of adding the construction waste powder in the formula, the construction waste powder is firmly adsorbed together by combining the porous adsorption function of the activated carbon and the electrostatic adsorption function of the dust-free wood fiber, the cohesion of slurry is greatly improved, the construction is smooth, the flying dust of the putty powder in the stirring process is reduced, and the health of operators is protected.
3. The light environment-friendly exterior wall leveling putty is characterized in that inorganic mineral fibers are further added on the basis of the dust-free wood fibers, and the risk of slurry cracking is reduced by combining the inorganic mineral fibers with JRS dust-free wood fibers and adopting a three-dimensional fiber crack resistance technology.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Examples 1 to 4: the lightweight environment-friendly leveling putty for the outer wall comprises the following components in percentage by weight, as shown in Table 1:
TABLE 1
| Components | Example 1 | Example 2 | Example 3 | Example 4 |
| Cement | 30％ | 20％ | 20％ | 35％ |
| Construction waste powder | 55％ | 65％ | 60％ | 50％ |
| Water-retaining agent | 0.3％ | 0.5％ | 0.4％ | 0.6％ |
| Water repellent | 0.2％ | 0.1％ | 0.2％ | 0.3％ |
| Activated carbon | 3％ | 1％ | 2％ | 3％ |
| Triethanolamine | 0.5％ | 0.5％ | 1％ | 0.5％ |
| Dust-free wood fiber | 2％ | 3％ | 2％ | 1％ |
| Inorganic mineral fiber | 4％ | 5％ | 8％ | 6％ |
| Latex powder | 1％ | 2％ | 3％ | 1％ |
| Pigment (I) | 4％ | 2.9％ | 3.4％ | 2.6％ |
In example 1, the cement was a general purpose portland cement, having a strength grade of 52.5R; the water retention agent is hydroxyethyl methyl cellulose ether, the ash content is less than 3 percent, and the viscosity is 40000 and 100000 centipoises; the water repellent is an organic silicon water repellent;
in example 2, the cement was a general purpose portland cement, having a strength rating of 42.5R; the water-retaining agent is hydroxypropyl methyl cellulose ether; the water repellent is a stearic acid water repellent;
in example 3, the cement was a general purpose portland cement, having a strength rating of 42.5; the water-retaining agent is the mixture of hydroxyethyl methyl cellulose ether and hydroxypropyl methyl cellulose ether, the mixing ratio is 1:1, the ash content is less than 3 percent, and the viscosity is 40000-100000 centipoises; the water repellent is stearic acid water repellent;
in example 4, the cement is a general purpose portland cement, the strength grades are two of 52.5 and 52.5R, and the proportion of the cement of the two strength grades is: 1: 1; the water-retaining agent is hydroxypropyl methyl cellulose ether; the water repellent is an organic silicon water repellent.
In examples 1 to 4, the construction waste powder was obtained by crushing and sieving construction waste, and the particle size was 300 mesh, the slip agent was SA-F produced by zhejiang co-creation building materials science and technology ltd, the dust-free wood fiber was produced by germany JRS, the latex powder was redispersible latex powder, the inorganic mineral fiber was brucite fiber, and the pigment was iron oxide series pigment.
The preparation method of the light and environment-friendly exterior wall leveling putty of the embodiment 1 to 4 comprises the steps of accurately weighing cement, construction waste powder, a water retaining agent, a water repellent, activated carbon, triethanolamine, dust-free wood fiber, inorganic mineral fiber, a slip agent, latex powder and pigment according to weight percentage, adding the weighed materials into a stirrer, stirring uniformly, and packaging to obtain the light and environment-friendly exterior wall leveling putty.
Comparative examples 1 to 2: the lightweight environment-friendly leveling putty for the outer wall comprises the following components in percentage by weight, as shown in Table 2:
TABLE 2
| Components | Comparative example 1 | Comparative example 2 |
| Cement | 30％ | 30％ |
| Construction waste powder | 58％ | 59％ |
| Water-retaining agent | 0.3％ | 0.3％ |
| Water repellent | 0.2％ | 0.2％ |
| Activated carbon | - | 3％ |
| Triethanolamine | 0.5％ | 0.5％ |
| Dust-free wood fiber | 2％ | 2％ |
| Inorganic mineral fiber | 4％ | - |
| Latex powder | 1％ | 1％ |
| Pigment (I) | 4％ | 4％ |
In comparative examples 1-2, the cement was general purpose portland cement, with a strength rating of 52.5R; the water retention agent is hydroxyethyl methyl cellulose ether, the ash content is less than 3 percent, and the viscosity is 40000 and 100000 centipoises; the water repellent is an organic silicon water repellent, the construction waste powder is powder with the particle size of 300 meshes after the construction waste is crushed and sieved, the slip agent is SA-F produced by Zhejiang co-creation building materials science and technology Limited, the dust-free wood fiber is produced by Germany JRS, the latex powder is redispersible latex powder, the inorganic mineral fiber is brucite fiber, and the pigment is iron oxide series pigment.
The preparation method of the light environment-friendly exterior wall leveling putty in the comparative examples 1-2 is the same as that of the light environment-friendly exterior wall leveling putty in the examples 1-4, and the preparation method is not described here.
The leveling putty obtained in the embodiments 1-4 and the comparative examples 1-2 is subjected to performance detection according to JG/T157-2009 putty for building exterior walls, T/CECS 538-2018 leveling putty application technical specification for buildings and HJ2537-2014 waterborne coating for environmental marking product technical requirements, and the results are shown in Table 3:
TABLE 3
| Test items | Example 1 | Example 2 | Example 3 | Example 4 | Comparative example 1 | Comparative example 2 |
| Compressive strength (MPa) | 10.8 | 11.5 | 11.2 | 11.8 | 10.6 | 9.5 |
| Tensile bond Strength (MPa) | 0.5 | 0.6 | 0.55 | 0.65 | 0.5 | 0.4 |
| Shrinkage (%) | 0.20 | 0.20 | 0.20 | 0.20 | 0.20 | 0.18 |
| Water retention (%) | 70 | 71 | 72 | 71 | 70 | 70 |
| Workability | Good taste | Good taste | Good taste | Good taste | Good wine | Good taste |
| Early stage drying cracking resistance of 6h | Does not crack | Does not crack | Does not crack | Does not crack | Does not crack | Cracking of |
As can be seen from the performance in Table 3, compared with the examples 1-4, the construction performance of the comparative example 1 is poor, and the construction is not smooth enough; comparative example 2 the tensile bond strength, shrinkage, water retention and initial dry crack resistance of comparative example 2 were relatively poor compared to examples 1-4.
The invention relates to light environment-friendly exterior wall leveling putty, which is characterized in that construction waste powder is used for replacing double-flying powder in the traditional putty, a large amount of ultrafine powder generated in the crushing process of construction waste can be consumed, the utilization rate of the ultrafine powder reaches 100 percent, and the product has the characteristics of light weight, environment friendliness and zero influence on ecology. The putty formula is characterized in that on the basis of adding the building waste powder, activated carbon and dust-free wood fiber are further added, the porous adsorption function of the activated carbon is combined with the electrostatic adsorption function of the dust-free wood fiber, the building waste powder is firmly adsorbed together, the cohesion of slurry is greatly improved, the construction is smooth, dust flying of the putty powder in the stirring process is reduced, the health of operators is protected, inorganic mineral fiber is further added, the inorganic mineral fiber is combined with JRS dust-free wood fiber, and the risk of slurry cracking is reduced by adopting a three-dimensional fiber crack resistance technology.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The lightweight environment-friendly leveling putty for the outer wall is characterized by comprising the following components in percentage by weight:
2. the lightweight environment-friendly exterior wall leveling putty as claimed in claim 1, wherein the cement is general purpose portland cement with a strength grade of any one or more of 42.5, 42.5R, 52.5 and 52.5R.
3. The light environment-friendly exterior wall leveling putty as claimed in claim 1, wherein the construction waste powder is powder with a particle size of 100-300 meshes after the construction waste is crushed and sieved.
4. The lightweight environment-friendly exterior wall leveling putty as claimed in claim 1, wherein the water retention agent is one or more of hydroxyethyl methyl cellulose ether and hydroxypropyl methyl cellulose ether, the ash content is less than 3%, and the viscosity is 40000-100000 centipoises.
5. The lightweight environment-friendly exterior wall leveling putty as claimed in claim 1, wherein the water repellent is an organosilicon water repellent or a stearic acid water repellent.
6. The lightweight environment-friendly exterior wall leveling putty as claimed in claim 1, wherein the slip agent is SA-F produced by Zhejiang co-creation building materials science and technology Limited, and/or the dust-free wood fiber is produced by Germany JRS.
7. The lightweight environment-friendly exterior wall leveling putty as claimed in claim 1, wherein the latex powder is re-dispersible latex powder.
8. The lightweight environment-friendly exterior wall leveling putty as claimed in claim 1, wherein the inorganic mineral fiber is brucite fiber.
9. The lightweight environment-friendly exterior wall leveling putty as claimed in claim 1, wherein the pigment is an iron oxide series pigment.
10. A preparation method of the light-weight environment-friendly exterior wall leveling putty as defined in any one of claims 1 to 9, which is characterized in that: the lightweight environment-friendly exterior wall leveling putty is prepared by accurately weighing cement, construction waste powder, a water retaining agent, a water repellent, activated carbon, triethanolamine, dust-free wood fiber, inorganic mineral fiber, a slip agent, latex powder and pigment according to weight percentage, adding the weighed materials into a stirrer, uniformly stirring and packaging.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113999582A (en) * | 2021-11-26 | 2022-02-01 | 甘肃中研同创材料科技有限责任公司 | Water-based building garbage waterproof coating and preparation method thereof |
| CN114621625A (en) * | 2021-12-31 | 2022-06-14 | 河北三棵树涂料有限公司 | Exterior wall putty using construction waste recycled aggregate and preparation method thereof |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101693794A (en) * | 2009-10-14 | 2010-04-14 | 深圳广田装饰集团股份有限公司 | Light and environment-friendly leveling putty for indoor decoration and construction method thereof |
| CN101693795A (en) * | 2009-10-21 | 2010-04-14 | 北京瑞祥涂料有限公司 | Pasty heat-insulating elastic putty |
| CN101935476A (en) * | 2010-09-09 | 2011-01-05 | 深圳广田装饰集团股份有限公司 | Leveling putty for interior decoration and construction method thereof |
| CN102250502A (en) * | 2011-06-08 | 2011-11-23 | 深圳广田装饰集团股份有限公司 | Light and environment-friendly leveling putty and construction method thereof |
| CN105036658A (en) * | 2015-07-29 | 2015-11-11 | 广州世正环保科技发展有限公司 | Multifunctional ceramic tile adhesive utilizing construction waste and preparation method thereof |
| US20150376399A1 (en) * | 2009-11-25 | 2015-12-31 | Petroliam Nasional Berhad (Petronas) | Water Curable Resin Formulations |
| CN106833089A (en) * | 2017-03-21 | 2017-06-13 | 深圳广田集团股份有限公司 | One kind building regeneration putty and construction method |
| CN107418283A (en) * | 2017-09-11 | 2017-12-01 | 浙江理工大学 | Environmental-friendputty putty powder that a kind of high-strength antibacterial is water-fast and preparation method thereof |
| CN108467619A (en) * | 2018-05-24 | 2018-08-31 | 合肥语林装饰工程有限公司 | A kind of water-fast putty powder for exterior wall and preparation method thereof |
| CN109294312A (en) * | 2018-05-15 | 2019-02-01 | 优高雅健康科技(深圳)有限公司 | The gypsum base powder of lacquer putty for use on for increasing anion can be lured |
| CN110128869A (en) * | 2019-06-14 | 2019-08-16 | 曹爱贞 | A kind of environment-friendly type can breathe inner wall putty and preparation method thereof |
-
2020
- 2020-05-26 CN CN202010457508.XA patent/CN111440473A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101693794A (en) * | 2009-10-14 | 2010-04-14 | 深圳广田装饰集团股份有限公司 | Light and environment-friendly leveling putty for indoor decoration and construction method thereof |
| CN101693795A (en) * | 2009-10-21 | 2010-04-14 | 北京瑞祥涂料有限公司 | Pasty heat-insulating elastic putty |
| US20150376399A1 (en) * | 2009-11-25 | 2015-12-31 | Petroliam Nasional Berhad (Petronas) | Water Curable Resin Formulations |
| CN101935476A (en) * | 2010-09-09 | 2011-01-05 | 深圳广田装饰集团股份有限公司 | Leveling putty for interior decoration and construction method thereof |
| CN102250502A (en) * | 2011-06-08 | 2011-11-23 | 深圳广田装饰集团股份有限公司 | Light and environment-friendly leveling putty and construction method thereof |
| CN105036658A (en) * | 2015-07-29 | 2015-11-11 | 广州世正环保科技发展有限公司 | Multifunctional ceramic tile adhesive utilizing construction waste and preparation method thereof |
| CN106833089A (en) * | 2017-03-21 | 2017-06-13 | 深圳广田集团股份有限公司 | One kind building regeneration putty and construction method |
| CN107418283A (en) * | 2017-09-11 | 2017-12-01 | 浙江理工大学 | Environmental-friendputty putty powder that a kind of high-strength antibacterial is water-fast and preparation method thereof |
| CN109294312A (en) * | 2018-05-15 | 2019-02-01 | 优高雅健康科技(深圳)有限公司 | The gypsum base powder of lacquer putty for use on for increasing anion can be lured |
| CN108467619A (en) * | 2018-05-24 | 2018-08-31 | 合肥语林装饰工程有限公司 | A kind of water-fast putty powder for exterior wall and preparation method thereof |
| CN110128869A (en) * | 2019-06-14 | 2019-08-16 | 曹爱贞 | A kind of environment-friendly type can breathe inner wall putty and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113999582A (en) * | 2021-11-26 | 2022-02-01 | 甘肃中研同创材料科技有限责任公司 | Water-based building garbage waterproof coating and preparation method thereof |
| CN114621625A (en) * | 2021-12-31 | 2022-06-14 | 河北三棵树涂料有限公司 | Exterior wall putty using construction waste recycled aggregate and preparation method thereof |
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Application publication date: 20200724 |