CN111908863B - Plastic formwork concrete wall surface plastering mortar and preparation method thereof - Google Patents
Plastic formwork concrete wall surface plastering mortar and preparation method thereof Download PDFInfo
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- CN111908863B CN111908863B CN202010682499.4A CN202010682499A CN111908863B CN 111908863 B CN111908863 B CN 111908863B CN 202010682499 A CN202010682499 A CN 202010682499A CN 111908863 B CN111908863 B CN 111908863B
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- plastering
- concrete wall
- mortar
- plastic formwork
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
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Abstract
The invention relates to a plastic template concrete wall plastering mortar and a preparation method thereof, wherein silica fume, anti-crack fiber, titanate, hydroxypropyl methyl cellulose, hydroxypropyl guar ether, rubber powder and cement are added into water and stirred to obtain the plastic template concrete wall plastering mortar; the raw materials are added stage by stage, so that the dispersibility of the inorganic components is improved, the components are uniformly dispersed to influence the plastering performance of the mortar when being used as a mixture, the uniform and fine mortar is easy to paint, and the adhesion is good after drying. By researching the plastering technology, the invention solves the problems of smooth molding surface of the plastic mould, difficult plastering adhesion, shortened construction period, reduced cost, driving the use of the plastic mould in the construction industry and solving the problem of low mortar adhesion strength of the existing plastic mould.
Description
Technical Field
The invention relates to plastering mortar, in particular to plastic formwork concrete wall surface plastering mortar and a preparation method thereof.
Background
The foot step of urban construction in China is accelerated continuously, the wood consumption quantity is increased continuously, and the tree degree demand is increased continuously, so that the plastic template becomes a better choice. The introduction of the plastic formwork is necessary, the plastic formwork serving as a novel building formwork is not only favorable for realizing the effective turnover of building construction, but also has the advantage of easy construction, but the plastering technology for achieving better plastering quality on the wall surface of the plastic formwork has not been deeply researched, so that the large-area use of the plastic formwork can not be completed, and the determination of the mixing ratio parameters of plastering mortar and the definition of the types of additives and the construction process become an important part. The prior art provides a white surface mortar composition, which is fine and compact in surface layer and good in finish degree after being hydrated with cement and other components, can be plastered into walls with different color surfaces, reduces the cost and improves the construction efficiency. The method is particularly suitable for the external wall heat insulation system of the civil buildings and the office buildings, and is economical and practical. Meanwhile, the coating can be used as the plastering mortar and the inner wall coating of other walls. In the prior art, 18-23 parts of water is added on the basis of the plastering mortar powder for external wall external insulation to obtain the plastering mortar slurry for external wall external insulation, and experiments prove that the rubber particles such as waste tires added in the material can improve the flexibility of the plastering mortar, reduce the defect that the surface of the plastering mortar is easy to crack, consume a large amount of waste tires, utilize wastes, save resources and protect the environment, play a great role in the field of buildings and have wide market prospect. But the mortar in the prior art has poor adhesion to the concrete wall surface of the plastic template.
Disclosure of Invention
The invention aims to provide plastering mortar for a plastic formwork concrete wall surface and a preparation method thereof.
In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows:
the plastic formwork concrete wall plastering mortar comprises the following components in parts by weight:
8 to 10 portions of silica fume
55 to 60 portions of cement
0.7 to 1 portion of hydroxypropyl methyl cellulose
2 to 2.5 portions of rubber powder
0.8 to 1 portion of anti-crack fiber
1.1 to 1.5 portions of starch ether
0.2 to 0.3 portion of titanate
Balance of water
Preferably, the following components:
8 to 10 portions of silica fume
55 to 60 portions of cement
0.8 to 0.9 portion of hydroxypropyl methyl cellulose
2.2 to 2.3 portions of rubber powder
0.8 to 1 portion of anti-crack fiber
1.2 to 1.3 portions of starch ether
0.2 to 0.3 portion of titanate
The balance of water.
In the invention, the rubber powder is ethylene/vinyl acetate copolymer and can be dispersed; the anti-crack fiber is polypropylene fiber; the starch ether is guar ether, which is more soluble in water. The pH value has no influence on the performance of the guar ether basically; the titanate is bis (dioctyloxypyrophosphate) ethylene titanate (pinin DN-9311). The invention takes the weight of the plastering mortar of the plastic template concrete wall surface as 100 parts; the cement is portland cement with a strength grade of 42.5.
The starch ether and the silica fume regulate the humidity of the plastering mortar, so that the moisture content difference of a wall plastering layer is reduced, the tensile property and the contractility of the plastering mortar are improved by adding the rubber powder and the anti-cracking fibers, the plastering layer can be effectively prevented from cracking, and the common defects of poor workability, low binding power, large shrinkage and easy cracking of the plastering mortar are overcome by combining with the titanate. The bonding degree of the plastering mortar and the concrete wall surface of the mould is increased by changing the mixing proportion of the plastering mortar and adding additives into the plastering mortar.
The invention also discloses a preparation method of the plastering mortar for the concrete wall surface of the plastic template, which comprises the steps of adding silica fume, anti-crack fibers and titanate into water; and adding hydroxypropyl methyl cellulose and starch ether after stirring, adding rubber powder and cement after stirring, and stirring to obtain the plastic formwork concrete wall surface plastering mortar.
In the technical scheme, the stirring speed is 800 rpm-1200 rpm. Preferably, firstly, adding the silica fume, the anti-crack fiber and the titanate into water; stirring for 20 minutes, adding hydroxypropyl methyl cellulose and starch ether, stirring for 10 minutes, adding rubber powder and cement, and stirring for 30 minutes to obtain the plastic formwork concrete wall surface plastering mortar; the raw materials are added stage by stage, so that the dispersibility of the inorganic components is improved, the components are uniformly dispersed to influence the plastering performance of the mortar when used as a mixture, the uniform and fine mortar is easy to smear, and the dried mortar has good adhesion.
The invention discloses a key technology for plastering a molded concrete wall, which limits the mixing proportion of mortar to influence the caking property of the mortar, improves the caking property of the mortar by using an additive and limits the mutual influence of the mixing proportion and the additive.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
the novel plastering mortar can promote the use of a mould, and achieves the effects of reducing tree cutting, protecting environment and saving energy; the enthusiasm of the industry on the research of plastering technology is promoted, the use of a plastic mould is increased, and the economic development is promoted; the use of the novel plastering mortar improves the overall appearance and quality of the wall surface, improves the evaluation of the owners to the company, and promotes the public praise of the company in the industry.
Economic benefits are as follows:
the use of the novel plastering mortar solves the difficult problem of plastic mould plastering, thereby reducing the labor force, saving the cost and shortening the construction period; the novel plastering mortar reduces the phenomena of hollowing, cracking and falling of a plastering layer, thereby reducing chiseling and repairing, saving materials and reducing the generation of construction waste; the use of the novel plastering mortar also promotes the exertion of the advantages of the plastic template, so that the construction period of each floor is shortened by 1-2 days, the cost is saved by about 10 ten thousand yuan, the plastic template is light and convenient, the labor force requirement is greatly reduced, and one project is accumulated and saved by about 20 ten thousand yuan.
Drawings
FIG. 1 is a molded concrete wall surface prior to plastering;
fig. 2 is a molded concrete wall surface after mortar plastering according to the present invention.
Detailed Description
The raw materials involved in the invention are conventional commercially available raw materials in the field of mortar, and the specific preparation method and the test method involved in the invention are conventional test methods in the field; for example, in the invention, the rubber powder is an ethylene/vinyl acetate copolymer and is redispersible rubber powder; the anti-crack fiber is polypropylene fiber; the starch ether is hydroxypropyl guar gum ether; the titanate is bis (dioctyloxypyrophosphate) ethylene titanate (pinine DN-9311); the cement is portland cement with a strength grade of 42.5.
The present invention will be further described with reference to the following examples.
Example one
The plastic formwork concrete wall surface plastering mortar is composed of the following raw materials in parts by weight (total weight 100 parts):
10 portions of silica fume
55 portions of cement
Hydroxypropyl methylcellulose 0.8 part
2.2 parts of rubber powder
1 part of crack-resistant fiber
Hydroxypropyl guar gum ether 1.2 parts
Titanate 0.2 part
The balance of water.
Firstly, adding silica fume, anti-crack fiber and titanate into water; stirring at 800rpm for 20 minutes, adding hydroxypropyl methyl cellulose and hydroxypropyl guar ether, stirring at 800rpm for 10 minutes, adding rubber powder and cement, and stirring at 1200rpm for 30 minutes to obtain the plastic formwork concrete wall plastering mortar; the raw materials are added stage by stage, so that the dispersibility of the inorganic components is improved, the components are uniformly dispersed to influence the plastering performance of the mortar when being used as a mixture, the uniform and fine mortar is easy to paint, and the adhesion is good after drying.
According to the building mortar basic performance test method standard JGJT70-2009, the tensile bonding strength is 0.78MPa in 14 days, and the shrinkage rate is 0.12% in 28 days.
Comparative example
The silica fume in the first embodiment is replaced by the second-level fly ash, and the rest is unchanged, so that the obtained mortar is subjected to the same test, the tensile bonding strength in 14 days is 0.53MPa, and the shrinkage in 28 days is 0.15%.
The titanate in the first example is removed, the rest is unchanged, and the obtained mortar is subjected to the same test, wherein the 14-day tensile bonding strength is 0.67MPa, and the 28-day shrinkage is 0.14%.
The mortar prepared by mixing the silica fume, the cement and the water in the first embodiment has tensile bonding strength of 0.31MPa in 14 days and shrinkage of 0.23% in 28 days after the same tests without adding other additives.
Example two
Mixing cement and water according to the weight ratio of 1: 1 to obtain beating slurry; then, conventionally beating the slurry on the surface of the concrete wall surface of the plastic template; and then, the plastic formwork concrete wall plastering mortar of the embodiment is plastered on the surface of the plastic formwork concrete wall conventionally to finish plastering of the surface of the plastic formwork wall. FIG. 1 is a molded concrete wall surface prior to plastering; fig. 2 shows that the concrete wall surface of the mold after mortar plastering of the embodiment has good bonding performance and no phenomena of hollowing, cracking and falling.
The existing plastic formwork concrete wall surface is used as a test piece to replace a test block of 10.0.4.3 in JGJT70-2009, the test method is not changed, the actual performance of the mortar is tested, the tensile bonding strength of the mortar in the first embodiment within 14 days is 0.72MPa, and the mortar is suitable for the plastic formwork concrete wall surface in actual buildings. The mortar of the first embodiment of the prior CN104556866A is tested by the same method, and the tensile bonding strength is 0.45MPa in 14 days; the mortar applied to the wood template concrete wall surface in the current project is tested according to JGJT70-2009, the 14-day tensile bonding strength is 0.69MPa, but under the test of the plastic template concrete wall surface, the 14-day tensile bonding strength is 0.51MPa; the different requirements of the matrix on mortar show that the performance of the existing mortar suitable for the wood template concrete wall surface can be reduced.
The construction method comprises the following steps of developing a new construction template for use in a building, continuously testing and practicing, replacing a traditional wood formwork with a novel plastic formwork, wherein the concrete wall surface after the construction of the plastic formwork is relatively smooth and is bonded with a plastering layer with certain difficulty; the invention changes the matching ratio of the plastering mortar and the mode of adding the additive, and changes the cohesiveness of the plastering mortar, thereby reducing the phenomena of hollowing, cracking and falling of a plastering layer, improving the quality and impression, simultaneously promoting the exertion of the advantages of a mould, achieving the purposes of quick construction, low cost and environmental protection, and obtaining better economic benefit and social benefit; through the research on the plastering technology, the problems of smooth molding surface of the plastic mold and difficult adhesion of plastering are solved, the construction period is shortened, the cost is reduced, the plastic mold is driven to be used in the construction industry, and the problem of low mortar bonding strength of the existing plastic mold is solved.
Claims (8)
1. The plastic formwork concrete wall surface plastering mortar is characterized by comprising the following components in parts by weight:
10 portions of silica fume
55 portions of cement
Hydroxypropyl methylcellulose 0.8 part
2.2 parts of rubber powder
1 part of anti-crack fiber
Hydroxypropyl guar gum ether 1.2 parts
Titanate 0.2 part
Balance of water
The rubber powder is an ethylene/vinyl acetate copolymer; the anti-crack fiber is polypropylene fiber; the starch ether is guar gum ether; the titanate is bis (dioctyloxypyrophosphate) ethylene titanate.
2. The method for preparing the plastering mortar for the plastic formwork concrete wall surface of claim 1, comprising the steps of adding silica fume, anti-crack fiber and titanate into water; and adding hydroxypropyl methyl cellulose and starch ether after stirring, adding rubber powder and cement after stirring, and stirring to obtain the plastic formwork concrete wall surface plastering mortar.
3. The preparation method of the plastering mortar for the concrete wall surface of the plastic template as claimed in claim 2, wherein the preparation method comprises the following steps: firstly, adding silica fume, anti-crack fiber and titanate into water; and stirring for 20 minutes, adding hydroxypropyl methyl cellulose and starch ether, stirring for 10 minutes, adding rubber powder and cement, and stirring for 30 minutes to obtain the plastic formwork concrete wall surface plastering mortar.
4. The preparation method of the plastering mortar for the concrete wall surface of the plastic template as claimed in claim 3, wherein the preparation method comprises the following steps: the stirring speed is 800 rpm-1200 rpm.
5. Use of the plastic formwork concrete wall plastering mortar of claim 1 in wall plastering.
6. Use of the plastic formwork concrete wall plastering mortar of claim 1 in plastic formwork concrete wall plastering.
7. A method for plastering a plastic formwork concrete wall, which is characterized in that the plastering mortar for the plastic formwork concrete wall, which is described in claim 1, is plastered on the surface of the plastic formwork concrete wall to finish plastering the surface of the plastic formwork.
8. A method of plastering a concrete wall with a plastic form as defined in claim 7, wherein the concrete wall surface is plastered first; and then plastering the plastic formwork concrete wall surface plastering mortar on the plastic formwork concrete wall surface to finish plastering the plastic formwork wall surface.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010682499.4A CN111908863B (en) | 2020-07-15 | 2020-07-15 | Plastic formwork concrete wall surface plastering mortar and preparation method thereof |
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| CN202010682499.4A CN111908863B (en) | 2020-07-15 | 2020-07-15 | Plastic formwork concrete wall surface plastering mortar and preparation method thereof |
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| CN111908863A CN111908863A (en) | 2020-11-10 |
| CN111908863B true CN111908863B (en) | 2022-11-04 |
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| CN115403320B (en) * | 2022-09-29 | 2023-09-12 | 中交二航局建筑工程有限公司 | Masonry wall surface beating slurry and preparation method thereof |
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| CN101913813A (en) * | 2010-08-17 | 2010-12-15 | 张云区 | Wall plastering and building solidifying material |
| CN103086638B (en) * | 2013-01-08 | 2015-07-08 | 张立功 | Mortar additive and production process thereof |
| CN106186915A (en) * | 2016-07-04 | 2016-12-07 | 成都市易建建筑材料有限公司 | Thin layer motar and construction method are directly scraped in modification |
| CN107445561A (en) * | 2017-09-21 | 2017-12-08 | 北京京城久筑建筑材料有限公司 | Polymer anticorrosion mortar and its application method |
| CN111302723A (en) * | 2018-12-11 | 2020-06-19 | 北京海普斯建材有限公司 | Aerated concrete dry-mixed plastering mortar and preparation method thereof |
| CN109626887B (en) * | 2019-01-03 | 2021-07-23 | 长安大学 | High-strength anti-freezing concrete repair mortar and preparation method thereof |
| CN111003980B (en) * | 2019-11-25 | 2022-02-25 | 西安五和土木工程新材料有限公司 | High-ductility waterproof anti-cracking composite mortar and mixing method and construction process thereof |
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