CN110698158A - Machine-sprayed polymer anti-crack plastering mortar and preparation method thereof - Google Patents
Machine-sprayed polymer anti-crack plastering mortar and preparation method thereof Download PDFInfo
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- CN110698158A CN110698158A CN201911090690.3A CN201911090690A CN110698158A CN 110698158 A CN110698158 A CN 110698158A CN 201911090690 A CN201911090690 A CN 201911090690A CN 110698158 A CN110698158 A CN 110698158A
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- plastering mortar
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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
- C04B28/14—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 calcium sulfate 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00146—Sprayable or pumpable mixtures
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00482—Coating or impregnation materials
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
Abstract
The invention relates to the field of building materials, and provides machine-sprayed polymer anti-cracking plastering mortar aiming at the problem that the existing repair mortar is easy to crack again, which comprises the following components in parts by weight: 17-20 parts of Portland cement; 8-10 parts of water; 10-12 parts of gypsum; 7-10 parts of fly ash; 80-85 parts of sand; 8-10 parts of nano silicon dioxide; 3-4 parts of 3, 9-perylene dicarboxylic acid; 0.5-1 part of lauryl alcohol polyoxyethylene ether; 1-1.5 parts of ethylene-vinyl acetate copolymer; the preparation method comprises the following steps: s1, adding 1/2 amounts of water, gypsum, fly ash, sand and nano silicon dioxide into a reaction vessel, and uniformly stirring to form a premix; and S2, adding the rest components into the premix while stirring, and uniformly stirring to obtain the machine-sprayed polymer anti-crack plastering mortar. The adhesive strength and the flexibility of the machine-sprayed polymer anti-cracking plastering mortar are improved, so that the machine-sprayed polymer anti-cracking plastering mortar is not easy to crack, does not need frequent repair, and is beneficial to energy conservation and environmental protection.
Description
Technical Field
The invention relates to the field of building materials, in particular to a machine-sprayed polymer anti-cracking plastering mortar and a preparation method thereof.
Background
The plastering mortar is also called as plastering mortar, and is mortar which is smeared on the surfaces of buildings and members and the surface of a base material, protects a base layer and meets the use requirement. The plastering mortar is mainly used for an anti-cracking protection layer of a heat insulation outer layer in a benzene thin plastering heat insulation system, and the plastering mortar is firmly combined with a base surface, so that the mortar is required to have good bonding force and anti-cracking capability.
The plastering mortar is also an extremely important part in repairing structures, and most of the existing repairing projects, especially ancient building repairing projects, have large area, no shrinkage joint and ancient method newly made conditions, so that the plastering mortar has higher requirements on the adhesive force and the crack resistance of the plastering mortar, the existing plastering mortar is difficult to meet the requirements, and the plastering mortar still has room for improvement.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the machine-sprayed polymer anti-cracking plastering mortar which has the advantages of improving the bonding strength and the anti-cracking capability of the machine-sprayed polymer anti-cracking plastering mortar.
The second purpose of the invention is to provide a preparation method of the machine-sprayed polymer anti-cracking plastering mortar, which has the advantage of enhancing the bonding strength and the anti-cracking capability of the prepared machine-sprayed polymer anti-cracking plastering mortar.
In order to achieve the first object, the invention provides the following technical scheme:
the machine-sprayed polymer anti-crack plastering mortar comprises the following components in parts by mass:
17-20 parts of Portland cement;
8-10 parts of water;
10-12 parts of gypsum;
7-10 parts of fly ash;
80-85 parts of sand;
8-10 parts of nano silicon dioxide;
3-4 parts of 3, 9-perylene dicarboxylic acid;
0.5-1 part of lauryl alcohol polyoxyethylene ether;
1-1.5 parts of ethylene-vinyl acetate copolymer.
By adopting the technical scheme, the 3, 9-perylenedicarboxylic acid, the polyoxyethylene lauryl ether and the ethylene-vinyl acetate copolymer are matched with each other in a synergistic manner, so that the bonding strength of the machine-sprayed polymer anti-crack plastering mortar is enhanced, the flexibility of the machine-sprayed polymer anti-crack plastering mortar is enhanced, the bonding force of the machine-sprayed polymer anti-crack plastering mortar is less susceptible to the influence of brittle shrinkage force, the bonding between the machine-sprayed polymer anti-crack plastering mortar and a base surface is firmer, and the machine-sprayed polymer anti-crack plastering mortar is less susceptible to cracking.
Because the 3, 9-perylene dicarboxylic acid contains a plurality of benzene ring conjugated structures, the 3, 9-perylene dicarboxylic acid, the polyoxyethylene lauryl ether and the ethylene-vinyl acetate copolymer are matched with each other in a synergistic manner, and the compressive strength of the mechanically sprayed polymer anti-cracking plastering mortar is favorably enhanced, so that the mechanically sprayed polymer anti-cracking plastering mortar is less prone to cracking under pressure.
The nano silicon dioxide is added, so that the filling of the pores in the machine-sprayed polymer anti-cracking plastering mortar is facilitated, the compactness of the machine-sprayed polymer anti-cracking plastering mortar is improved, the compressive strength of the machine-sprayed polymer anti-cracking plastering mortar is enhanced, and the machine-sprayed polymer anti-cracking plastering mortar is less prone to cracking under pressure.
The nano silicon dioxide is also beneficial to improving the thixotropic property of the machine-sprayed polymer anti-cracking plastering mortar, so that the machine-sprayed polymer anti-cracking plastering mortar has excellent bonding strength, and meanwhile, the machine-sprayed polymer anti-cracking plastering mortar has a stronger anti-sliding and hanging effect after being put on a wall.
The invention is further configured to: the sand comprises the following components in parts by mass: 2.5: 3:1 of continuous graded sand with the grain diameter of 0.15-0.6mm, continuous graded sand with the grain diameter of 0.6-1.18mm, continuous graded sand with the grain diameter of 1.18-2.36mm and continuous graded sand with the grain diameter of 2.36-4.75 mm.
By adopting the technical scheme, the aggregate in the machine-sprayed polymer anti-cracking plastering mortar is more densely accumulated by adopting the cooperative matching of a certain amount of continuous graded sand with different particle sizes, so that the compactness of the machine-sprayed polymer anti-cracking plastering mortar is improved, the compressive strength of the machine-sprayed polymer anti-cracking plastering mortar is stronger, and the machine-sprayed polymer anti-cracking plastering mortar is less prone to cracking under pressure.
The invention is further configured to: the fly ash is class II fly ash.
By adopting the technical scheme, the II-grade fly ash is adopted as the aggregate, so that the fly ash is favorably and closely accumulated with sands with different continuous gradations, the compactness of the machine-sprayed polymer anti-cracking plastering mortar is favorably improved, the compressive strength of the machine-sprayed polymer anti-cracking plastering mortar is enhanced, and the machine-sprayed polymer anti-cracking plastering mortar is further less prone to cracking under pressure.
The invention is further configured to: the paint also comprises the following components in parts by mass:
2-3 parts of castor beans;
0.5-1 part of dibenzofuran.
By adopting the technical scheme, the castor bean and the dibenzofuran are added to be matched with each other in a synergistic manner, so that the bonding strength and the flexibility of the machine-sprayed polymer anti-cracking plastering mortar are favorably enhanced, the bonding force of the machine-sprayed polymer anti-cracking plastering mortar is less susceptible to the influence of brittle shrinkage force, the machine-sprayed polymer anti-cracking plastering mortar is more firmly bonded with a base surface, and the machine-sprayed polymer anti-cracking plastering mortar is less prone to cracking.
The invention is further configured to: the paint also comprises the following components in parts by mass:
1-1.5 parts of fructus cannabis.
By adopting the technical scheme, the hemp seeds are added, so that the flexibility of the machine-sprayed polymer anti-crack plastering mortar is enhanced, the bonding force of the machine-sprayed polymer anti-crack plastering mortar is not easily influenced by the brittle shrinkage force, the anti-crack strength of the machine-sprayed polymer anti-crack plastering mortar is enhanced, and the machine-sprayed polymer anti-crack plastering mortar is not easily cracked.
The invention is further configured to: the paint also comprises the following components in parts by mass:
2-3 parts of flaxseed.
By adopting the technical scheme, the flax seeds and the hemp seeds are added to be matched with each other in a synergistic manner, so that the flexibility of the machine-sprayed polymer anti-crack plastering mortar is favorably and better enhanced, the bonding force of the machine-sprayed polymer anti-crack plastering mortar is more difficult to be influenced by the brittle shrinkage force, the anti-crack strength of the machine-sprayed polymer anti-crack plastering mortar is favorably enhanced, and the machine-sprayed polymer anti-crack plastering mortar is more difficult to crack; meanwhile, the compressive strength of the machine-sprayed polymer anti-cracking plastering mortar is favorably enhanced, so that the machine-sprayed polymer anti-cracking plastering mortar is less prone to cracking under pressure.
The invention is further configured to: the paint also comprises the following components in parts by mass:
0.01-0.03 part of starch ether;
0.2-0.3 part of cellulose ether.
By adopting the technical scheme, the starch ether and the cellulose ether are added to be matched with each other in a synergistic manner, so that the consistency of the machine-sprayed polymer anti-crack plastering mortar is favorably improved, the machine-sprayed polymer anti-crack plastering mortar has better sagging resistance, the machine-sprayed polymer anti-crack plastering mortar is less prone to slipping after plastering, and the risk of sagging and cracking of the machine-sprayed polymer anti-crack plastering mortar is favorably reduced.
The invention is further configured to: the paint also comprises the following components in parts by mass:
1-2 parts of redispersible latex powder.
By adopting the technical scheme, the addition of the redispersible latex powder is beneficial to improving the tensile bonding strength of the machine-sprayed polymer anti-crack plastering mortar, so that a good, stable and uniform bonding surface is provided for the subsequent process in the construction process; meanwhile, the flexibility of the machine-sprayed polymer anti-cracking plastering mortar is improved, so that the machine-sprayed polymer anti-cracking plastering mortar can effectively resist plastering surface hollowing and cracking caused by slight deformation of a base layer.
The invention is further configured to: the paint also comprises the following components in parts by mass:
1.5-2 parts of polypropylene fiber.
By adopting the technical scheme, the polypropylene fiber is added and is a chopped fiber, so that the cracking risk possibly caused by the micro shrinkage stress of the machine-sprayed polymer anti-cracking plastering mortar is reduced.
In order to achieve the second object, the invention provides the following technical scheme:
a preparation method of machine-sprayed polymer anti-crack plastering mortar comprises the following steps:
s1, adding 1/2 amounts of water, gypsum, fly ash, sand and nano silicon dioxide into a reaction vessel, and uniformly stirring to form a premix;
and S2, adding the rest components into the premix while stirring, and uniformly stirring to obtain the machine-sprayed polymer anti-crack plastering mortar.
By adopting the technical scheme, water, gypsum, fly ash, sand and nano silicon dioxide with 1/2 weight are added and uniformly stirred to form a pre-mixture, and then the rest substances are added and uniformly stirred to form the machine-sprayed polymer anti-cracking plastering mortar, so that the components in the machine-sprayed polymer anti-cracking plastering mortar are better cooperated with one another, the bonding strength of the machine-sprayed polymer anti-cracking plastering mortar is stronger, meanwhile, the flexibility of the machine-sprayed polymer anti-cracking plastering mortar is higher, the bonding force of the machine-sprayed polymer anti-cracking plastering mortar is less susceptible to the influence of brittle shrinkage force, the anti-cracking strength of the machine-sprayed polymer anti-cracking plastering mortar is enhanced, and the machine-sprayed polymer anti-cracking plastering mortar is less susceptible to cracking.
In conclusion, the invention has the following beneficial effects:
1. by adopting the mutual synergistic cooperation of the 3, 9-perylenedicarboxylic acid, the polyoxyethylene lauryl ether and the ethylene-vinyl acetate copolymer, the bonding strength and the flexibility of the mechanically sprayed polymer anti-cracking plastering mortar are favorably enhanced, so that the mechanically sprayed polymer anti-cracking plastering mortar is less prone to cracking;
2. by adopting the mutual synergistic matching of the 3, 9-perylenedicarboxylic acid, the polyoxyethylene lauryl ether and the ethylene-vinyl acetate copolymer, the compressive strength of the mechanically sprayed polymer anti-cracking plastering mortar is favorably enhanced, so that the mechanically sprayed polymer anti-cracking plastering mortar is less prone to cracking under pressure;
3. the nano silicon dioxide is added, so that the pores in the machine-sprayed polymer anti-cracking plastering mortar can be filled, the compactness of the machine-sprayed polymer anti-cracking plastering mortar is improved, and the compressive strength of the machine-sprayed polymer anti-cracking plastering mortar can be enhanced;
4. the nano silicon dioxide is also beneficial to improving the thixotropic property of the machine-sprayed polymer anti-cracking plastering mortar, so that the machine-sprayed polymer anti-cracking plastering mortar has excellent bonding strength, and has stronger anti-sliding and sagging effects after the machine-sprayed polymer anti-cracking plastering mortar is put on a wall;
5. the water, the gypsum, the fly ash, the sand and the nano silicon dioxide are added in 1/2 weight portions and are uniformly stirred to form a pre-mixture, and then the rest substances are added and are uniformly stirred to form the machine-sprayed polymer anti-cracking plastering mortar, so that the components in the machine-sprayed polymer anti-cracking plastering mortar are favorably matched with each other in a better synergistic manner, and the bonding strength and the flexibility of the machine-sprayed polymer anti-cracking plastering mortar are higher.
Drawings
FIG. 1 is a process flow diagram of a preparation method of the organic spray polymer anti-crack plastering mortar of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
In the following examples, Portland cement of P.O42.5R type manufactured by Yanxin Yonggang group Co., Ltd was used.
In the following examples, the gypsum used was Beijing Ming Jiapeng Sheng building decoration engineering Co.
In the following examples, class II fly ash from a Baifeng mineral processing plant, Lingshu county, was used as the fly ash.
In the following examples, river sand from Shijiazhuan Xinsheng mineral products Co.
In the following examples, 8000 mesh nanosilica, a new material company, borreliaceae, was used as the nanosilica.
In the following examples, 3, 9-perylenedicarboxylic acid was 3, 9-perylenedicarboxylic acid available from Zheng Akme chemical Co., Ltd.
In the following examples, polyoxyethylene lauryl ether from Yuancheng Samson technologies, Inc. from Hubei is used.
In the following examples, an ethylene-vinyl acetate copolymer having a designation of 53007 manufactured by Nojin plastics Co., Ltd, of Dongguan was used as the ethylene-vinyl acetate copolymer.
In the following examples, the castor bean is a wild castor bean belonging to the cooperative society of the Xianggang Xijian Chinese medicinal plant in Bozhou city.
In the following examples, dibenzofuran sold under the trade name 0429 by Oldham bio-pharmaceuticals of Hubei was used.
In the following examples, the fructus cannabis is prepared from the purchasing and selling station of the medicinal material Lixing Zhengzhen Liangyehong in Taihe county.
In the following examples, heat-loss in the city of Bozhou is used for heat-loss in the city of Mao Qian Cao and the side products of the city of Chun.
In the following examples, hydroxypropyl starch ether from Geneva Macro-Biotech limited was used as the starch ether.
In the following examples, cellulose ethers of the type 10W-HPMC (E) from Hebei Yida cellulose Ltd are used.
In the following examples, the redispersible latex powder is HJ-2013, which is available from Funan Hao polymer chemical Co.
The polypropylene fiber is 6mm polypropylene fiber of Liaoning Wan concrete new material science and technology limited.
Example 1
The machine-sprayed polymer anti-crack plastering mortar comprises the following components:
17kg of Portland cement; 10kg of water; 11kg of gypsum; 7kg of fly ash; 85kg of sand; 9kg of nano silicon dioxide; 4kg of 3, 9-perylene dicarboxylic acid; 0.5kg of polyoxyethylene lauryl ether; 1.25kg of ethylene-vinyl acetate copolymer.
In this example, the sand was uniformly mixed with 34kg of continuous graded sand having a particle size of 0.15 to 0.6mm, 17kg of continuous graded sand having a particle size of 0.6 to 1.18mm, 25.5kg of continuous graded sand having a particle size of 1.18 to 2.36mm, and 8.5kg of continuous graded sand having a particle size of 2.36 to 4.75 mm.
The preparation method of the machine-sprayed polymer anti-crack plastering mortar comprises the following steps:
s1, stirring at the normal temperature and the rotation speed of 250r/min in a 200L stirring kettle, adding 5kg of water, 11kg of gypsum, 7kg of fly ash, 85kg of sand and 9kg of nano silicon dioxide while stirring, and uniformly stirring to form a premix;
s2, adding 17kg of Portland cement, 5kg of water, 4kg of 3, 9-perylene dicarboxylic acid, 0.5kg of polyoxyethylene lauryl ether and 1.25kg of ethylene-vinyl acetate copolymer into the pre-mixture while stirring, and uniformly stirring to obtain the machine-sprayed polymer anti-cracking plastering mortar.
Example 2
The machine-sprayed polymer anti-crack plastering mortar comprises the following components:
19.5kg of Portland cement; 8kg of water; 12kg of gypsum; 9.5kg of fly ash; 80kg of sand; 10kg of nano silicon dioxide; 3kg of 3, 9-perylene dicarboxylic acid; 1kg of polyoxyethylene lauryl ether; 1.5kg of ethylene-vinyl acetate copolymer.
In this example, the sand was prepared by uniformly mixing 32kg of continuous graded sand having a particle size of 0.15 to 0.6mm, 16kg of continuous graded sand having a particle size of 0.6 to 1.18mm, 24kg of continuous graded sand having a particle size of 1.18 to 2.36mm, and 8kg of continuous graded sand having a particle size of 2.36 to 4.75 mm.
The preparation method of the machine-sprayed polymer anti-crack plastering mortar comprises the following steps:
s1, stirring at the normal temperature and the rotation speed of 250r/min in a 200L stirring kettle, adding 4kg of water, 12kg of gypsum, 9.5kg of fly ash, 80kg of sand and 10kg of nano silicon dioxide while stirring, and uniformly stirring to form a premix;
s2, adding 19.5kg of Portland cement, 4kg of water, 3, 9-perylene dicarboxylic acid, 1kg of polyoxyethylene lauryl ether and 1.5kg of ethylene-vinyl acetate copolymer into the pre-mixture while stirring, and uniformly stirring to obtain the machine-sprayed polymer anti-crack plastering mortar.
Example 3
The machine-sprayed polymer anti-crack plastering mortar comprises the following components:
20kg of Portland cement; 9kg of water; 10kg of gypsum; 10kg of fly ash; 82.5kg of sand; 8kg of nano silicon dioxide; 3.5kg of 3, 9-perylene dicarboxylic acid; 0.75kg of polyoxyethylene lauryl ether; 1kg of ethylene-vinyl acetate copolymer.
In this example, the sand was prepared by uniformly mixing 33kg of continuous graded sand having a particle size of 0.15 to 0.6mm, 16.5kg of continuous graded sand having a particle size of 0.6 to 1.18mm, 24.75kg of continuous graded sand having a particle size of 1.18 to 2.36mm, and 8.25kg of continuous graded sand having a particle size of 2.36 to 4.75 mm.
The preparation method of the machine-sprayed polymer anti-crack plastering mortar comprises the following steps:
s1, stirring at the normal temperature and at the rotating speed of 250r/min in a 200L stirring kettle, adding 4.5kg of water, 10kg of gypsum, 10kg of fly ash, 82.5kg of sand and 8kg of nano silicon dioxide while stirring, and uniformly stirring to form a premix;
s2, adding 20kg of Portland cement, 4.5kg of water, 3.5kg of 3, 9-perylene dicarboxylic acid, 0.75kg of polyoxyethylene lauryl ether and 1kg of ethylene-vinyl acetate copolymer into the pre-mixture while stirring, and uniformly stirring to obtain the machine-sprayed polymer anti-cracking plastering mortar.
Example 4
The machine-sprayed polymer anti-crack plastering mortar comprises the following components:
18kg of Portland cement; 8.5kg of water; 11.5kg of gypsum; 9kg of fly ash; 82kg of sand; 9.5kg of nano silicon dioxide; 3.8kg of 3, 9-perylene dicarboxylic acid; 0.9kg of polyoxyethylene lauryl ether; 1.4kg of ethylene-vinyl acetate copolymer.
In this example, the sand was prepared by uniformly mixing 32.8kg of continuous graded sand having a particle size of 0.15 to 0.6mm, 16.4kg of continuous graded sand having a particle size of 0.6 to 1.18mm, 24.6kg of continuous graded sand having a particle size of 1.18 to 2.36mm, and 8.2kg of continuous graded sand having a particle size of 2.36 to 4.75 mm.
The preparation method of the machine-sprayed polymer anti-crack plastering mortar comprises the following steps:
s1, stirring at the normal temperature and at the rotating speed of 250r/min in a 200L stirring kettle, adding 4.25kg of water, 11.5kg of gypsum, 9kg of fly ash, 82kg of sand and 9.5kg of nano silicon dioxide while stirring, and uniformly stirring to form a premix;
s2, adding 18kg of Portland cement, 4.25kg of water, 3.8kg of 3, 9-perylene dicarboxylic acid, 0.9kg of polyoxyethylene lauryl ether and 1.4kg of ethylene-vinyl acetate copolymer into the pre-mixture while stirring, and uniformly stirring to obtain the machine-sprayed polymer anti-cracking plastering mortar.
Example 5
The difference from example 4 is that: the sand is prepared by uniformly mixing 24.6kg of continuous graded sand with the grain diameter of 0.15-0.6mm, 24.6kg of continuous graded sand with the grain diameter of 0.6-1.18mm, 24.6kg of continuous graded sand with the grain diameter of 1.18-2.36mm and 8.2kg of continuous graded sand with the grain diameter of 2.36-4.75 mm.
Example 6
The difference from example 4 is that: the sand is prepared by uniformly mixing 28.7kg of continuous graded sand with the grain diameter of 0.15-0.6mm, 20.5kg of continuous graded sand with the grain diameter of 0.6-1.18mm, 20.5kg of continuous graded sand with the grain diameter of 1.18-2.36mm and 12.3kg of continuous graded sand with the grain diameter of 2.36-4.75 mm.
Example 7
The difference from example 4 is that: the sand is prepared by uniformly mixing 28.7kg of continuous graded sand with the grain diameter of 0.15-0.6mm, 20.5kg of continuous graded sand with the grain diameter of 0.6-1.18mm, 28.7kg of continuous graded sand with the grain diameter of 1.18-2.36mm and 4.1kg of continuous graded sand with the grain diameter of 2.36-4.75 mm.
Example 8
The difference from example 4 is that: the sand is prepared by uniformly mixing 28.7kg of continuous graded sand with the grain diameter of 0.15-0.6mm, 20.5kg of continuous graded sand with the grain diameter of 0.6-1.18mm, 24.6kg of continuous graded sand with the grain diameter of 1.18-2.36mm and 8.2kg of continuous graded sand with the grain diameter of 2.36-4.75 mm.
Example 9
The difference from example 8 is that:
the machine-sprayed polymer anti-crack plastering mortar also comprises the following components:
2kg of castor beans; 1kg of dibenzofuran.
Wherein, the castor bean and the dibenzofuran are added into a stirring kettle together with the silicate cement, the rest water, the 3, 9-perylene dicarboxylic acid, the polyoxyethylene lauryl ether and the ethylene-vinyl acetate copolymer for stirring.
Example 10
The difference from example 8 is that:
the machine-sprayed polymer anti-crack plastering mortar also comprises the following components:
3kg of castor beans; 0.5kg of dibenzofuran.
Wherein, the castor bean and the dibenzofuran are added into a stirring kettle together with the silicate cement, the rest water, the 3, 9-perylene dicarboxylic acid, the polyoxyethylene lauryl ether and the ethylene-vinyl acetate copolymer for stirring.
Example 11
The difference from example 10 is that: castor bean is not added into the machine-sprayed polymer anti-cracking plastering mortar.
Example 12
The difference from example 10 is that: the component dibenzofuran is not added into the machine-sprayed polymer anti-cracking plastering mortar.
Example 13
The difference from example 8 is that:
the machine-sprayed polymer anti-crack plastering mortar also comprises the following components:
2kg of castor beans; 1kg of dibenzofuran; 1.25kg of fructus cannabis; 2kg of flaxseeds; 0.02kg of starch ether; 0.25kg of cellulose ether; 2kg of redispersible latex powder; 2kg of polypropylene fibers.
Wherein, the castor bean, the dibenzofuran, the fructus cannabis, the flaxseed, the starch ether, the cellulose ether, the redispersible latex powder and the polypropylene fiber are added into a stirring kettle together with the silicate cement, the rest water, the 3, 9-perylene dicarboxylic acid, the polyoxyethylene lauryl ether and the ethylene-vinyl acetate copolymer for stirring.
Example 14
The difference from example 8 is that:
the machine-sprayed polymer anti-crack plastering mortar also comprises the following components:
2.5kg of castor bean; 0.5kg of dibenzofuran; 1.5kg of fructus cannabis; 2.5kg of flaxseed; 0.01kg of starch ether; 0.3kg of cellulose ether; 1.5kg of redispersible latex powder; 1.75kg of polypropylene fibers.
Wherein, the castor bean, the dibenzofuran, the fructus cannabis, the flaxseed, the starch ether, the cellulose ether, the redispersible latex powder and the polypropylene fiber are added into a stirring kettle together with the silicate cement, the rest water, the 3, 9-perylene dicarboxylic acid, the polyoxyethylene lauryl ether and the ethylene-vinyl acetate copolymer for stirring.
Example 15
The difference from example 8 is that:
the machine-sprayed polymer anti-crack plastering mortar also comprises the following components:
3kg of castor beans; 0.75kg of dibenzofuran; 1kg of fructus cannabis; 3kg of flaxseed; 0.03kg of starch ether; 0.2kg of cellulose ether; 1kg of redispersible latex powder; 1.5kg of polypropylene fibers.
Wherein, the castor bean, the dibenzofuran, the fructus cannabis, the flaxseed, the starch ether, the cellulose ether, the redispersible latex powder and the polypropylene fiber are added into a stirring kettle together with the silicate cement, the rest water, the 3, 9-perylene dicarboxylic acid, the polyoxyethylene lauryl ether and the ethylene-vinyl acetate copolymer for stirring.
Example 16
The difference from example 8 is that:
the machine-sprayed polymer anti-crack plastering mortar also comprises the following components:
2.7kg of castor bean; 0.6kg of dibenzofuran; 1.4kg of fructus cannabis; 2.1kg of flaxseed; 0.02kg of starch ether; 0.28kg of cellulose ether; 1.8kg of redispersible latex powder; 1.6kg of polypropylene fibers.
Wherein, the castor bean, the dibenzofuran, the fructus cannabis, the flaxseed, the starch ether, the cellulose ether, the redispersible latex powder and the polypropylene fiber are added into a stirring kettle together with the silicate cement, the rest water, the 3, 9-perylene dicarboxylic acid, the polyoxyethylene lauryl ether and the ethylene-vinyl acetate copolymer for stirring.
Comparative example 1
The difference from example 8 is that: the components of 3, 9-perylene dicarboxylic acid, polyoxyethylene lauryl ether and ethylene-vinyl acetate copolymer are not added into the machine-sprayed polymer anti-cracking plastering mortar.
Comparative example 2
The difference from example 8 is that: the component 3, 9-perylene dicarboxylic acid is not added into the machine-sprayed polymer anti-cracking plastering mortar.
Comparative example 3
The difference from example 8 is that: the lauryl alcohol polyoxyethylene ether is not added into the machine-sprayed polymer anti-cracking plastering mortar.
Comparative example 4
The difference from example 8 is that: the component ethylene-vinyl acetate copolymer is not added into the machine-sprayed polymer anti-cracking plastering mortar.
Experiment 1
After the machine-sprayed polymer anti-crack plastering mortar prepared in the above examples and comparative examples is pumped through a pipe with the length of 100 meters and the inner diameter of 6 centimeters, the machine-sprayed polymer anti-crack plastering mortar is vertically sprayed on a wall through a spraying machine, the spraying thickness is controlled to be 8 centimeters, and the bleeding and segregation phenomena of the machine-sprayed polymer anti-crack plastering mortar in the pumping process and the coating sagging phenomenon of the machine-sprayed polymer anti-crack plastering mortar after spraying are observed and recorded.
Experiment 2
The cracking resistance ratio (%) of the machine-sprayed polymer anti-cracking plastering mortar prepared in the above examples and comparative examples was tested according to JC/T951-2005 "Cement mortar anti-cracking Performance test method".
Experiment 3
The 28d compressive strength (MPa) of the machine-sprayed polymer anti-cracking plastering mortar prepared in the above examples and comparative examples is tested according to the relevant regulations of GB/T17671-1999 cement mortar Strength test method.
Experiment 4
The transverse deformation capability (mm) of the machine-sprayed polymer anti-cracking plastering mortar prepared in the above examples and comparative examples is tested according to appendix A in JC/T1004-2006 ceramic wall and floor tile joint mixture.
Experiment 5
The folding ratio of the machine-sprayed polymer anti-crack plastering mortar prepared in the above examples and comparative examples is detected according to the performance index of the surface mortar in Table 6 in GB/T29906-2013 molded polyphenyl board thin-plastered exterior wall external thermal insulation system material.
Experiment 6
The tensile bond strength (MPa) of the machine-sprayed polymer anti-cracking plastering mortar prepared in the above examples and comparative examples was measured according to the relevant specifications of JGJ/T70-2009 "standard for testing basic performance of building mortar", and curing was performed with reference to the relevant specifications of JC/T907-2002 "concrete interface treating agent".
The data from the above experiments are shown in Table 1.
TABLE 1
According to the comparison of the data of the embodiments 4 to 8 in table 1, the aggregate in the machine-sprayed polymer anti-crack plastering mortar is favorably and more densely accumulated by controlling the particle size and the dosage of the sand in the machine-sprayed polymer anti-crack plastering mortar, so that the compactness of the machine-sprayed polymer anti-crack plastering mortar is favorably improved, the compressive strength of the machine-sprayed polymer anti-crack plastering mortar is higher, and the machine-sprayed polymer anti-crack plastering mortar is less prone to cracking under pressure; meanwhile, the adhesive strength and the flexibility of the machine-sprayed polymer anti-cracking plastering mortar are improved.
According to the data comparison of the examples 8 to 10 in the table 1, the castor bean and the dibenzofuran are added to be matched with each other in a synergistic manner, so that the bonding strength and the flexibility of the machine-sprayed polymer anti-crack plastering mortar are enhanced, the bonding force of the machine-sprayed polymer anti-crack plastering mortar is less susceptible to the influence of brittle shrinkage force, the anti-crack ratio of the machine-sprayed polymer anti-crack plastering mortar is enhanced, and the machine-sprayed polymer anti-crack plastering mortar is less prone to cracking; meanwhile, the compressive strength of the machine-sprayed polymer anti-cracking plastering mortar is favorably enhanced.
According to the data comparison of examples 9-12 in table 1, the castor bean and the dibenzofuran can be synergistically combined with each other to improve the bonding strength, the compressive strength and the flexibility of the machine-sprayed polymer anti-cracking plastering mortar, and the lack of any component can easily influence the bonding strength, the compressive strength and the flexibility of the machine-sprayed polymer anti-cracking plastering mortar.
According to the comparison of the data of the embodiment 8 and the embodiments 13 to 15 in table 1, the castor bean, the dibenzofuran, the fructus cannabis, the linseed, the starch ether, the cellulose ether, the redispersible latex powder and the polypropylene fiber are added, so that the bonding strength, the compressive strength and the flexibility of the machine-sprayed polymer anti-crack plastering mortar are improved to a certain extent, the bonding force of the machine-sprayed polymer is less susceptible to the brittle shrinkage of the machine-sprayed polymer anti-crack plastering mortar, and the machine-sprayed polymer anti-crack plastering mortar is less prone to cracking.
According to the comparison of the data of the example 8 and the comparative examples 1 to 4 in the table 1, only when the 3, 9-perylenedicarboxylic acid, the polyoxyethylene lauryl ether and the ethylene-vinyl acetate copolymer are synergistically matched with each other, the compressive strength, the bonding strength and the flexibility of the machine-sprayed polymer anti-cracking plastering mortar can be better improved, so that the machine-sprayed polymer anti-cracking plastering mortar is less prone to cracking, and any component is absent, so that the compressive strength, the bonding strength and the flexibility of the machine-sprayed polymer anti-cracking plastering mortar are easily influenced.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (10)
1. The machine-sprayed polymer anti-crack plastering mortar is characterized by comprising the following components in parts by weight: the paint comprises the following components in parts by mass:
17-20 parts of Portland cement;
8-10 parts of water;
10-12 parts of gypsum;
7-10 parts of fly ash;
80-85 parts of sand;
8-10 parts of nano silicon dioxide;
3-4 parts of 3, 9-perylene dicarboxylic acid;
0.5-1 part of lauryl alcohol polyoxyethylene ether;
1-1.5 parts of ethylene-vinyl acetate copolymer.
2. The machine-sprayed polymer anti-crack plastering mortar of claim 1, wherein: the sand comprises the following components in parts by mass: 2.5: 3:1 of continuous graded sand with the grain diameter of 0.15-0.6mm, continuous graded sand with the grain diameter of 0.6-1.18mm, continuous graded sand with the grain diameter of 1.18-2.36mm and continuous graded sand with the grain diameter of 2.36-4.75 mm.
3. The machine-sprayed polymer anti-crack plastering mortar of claim 1, wherein: the fly ash is class II fly ash.
4. The machine-sprayed polymer anti-crack plastering mortar of any one of claims 1 to 3, wherein: the paint also comprises the following components in parts by mass:
2-3 parts of castor beans;
0.5-1 part of dibenzofuran.
5. The machine-sprayed polymer anti-crack plastering mortar of any one of claims 1 to 3, wherein: the paint also comprises the following components in parts by mass:
1-1.5 parts of fructus cannabis.
6. The machine-sprayed polymer anti-crack plastering mortar of claim 5, wherein: the paint also comprises the following components in parts by mass:
2-3 parts of flaxseed.
7. The machine-sprayed polymer anti-crack plastering mortar of any one of claims 1 to 3, wherein: the paint also comprises the following components in parts by mass:
0.01-0.03 part of starch ether;
0.2-0.3 part of cellulose ether.
8. The machine-sprayed polymer anti-crack plastering mortar of any one of claims 1 to 3, wherein: the paint also comprises the following components in parts by mass:
1-2 parts of redispersible latex powder.
9. The machine-sprayed polymer anti-crack plastering mortar of any one of claims 1 to 3, wherein: the paint also comprises the following components in parts by mass:
1.5-2 parts of polypropylene fiber.
10. A method for preparing the machine-sprayed polymer anti-crack plastering mortar of any one of claims 1 to 9, which is characterized by comprising the following steps: the method comprises the following steps:
s1, adding 1/2 amounts of water, gypsum, fly ash, sand and nano silicon dioxide into a reaction vessel, and uniformly stirring to form a premix;
and S2, adding the rest components into the premix while stirring, and uniformly stirring to obtain the machine-sprayed polymer anti-crack plastering mortar.
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