阅读说明：本技术 机喷聚合物抗裂抹灰砂浆及其制备方法 (Machine-sprayed polymer anti-crack plastering mortar and preparation method thereof ) 是由 吴刚 邓曼宁 廖森林 张懿 李他� 于 2019-11-09 设计创作，主要内容包括：本发明涉及建筑材料领域,针对现有的修补砂浆容易再次开裂的问题,提供一种机喷聚合物抗裂抹灰砂浆,包括以下质量份数的组分：硅酸盐水泥17-20份；水8-10份；石膏10-12份；粉煤灰7-10份；砂80-85份；纳米二氧化硅8-10份；3,9-苝二甲酸3-4份；月桂醇聚氧乙烯醚0.5-1份；乙烯-醋酸乙烯共聚物1-1.5份；制备方法包括以下步骤：S1、在反应容器中加入1/2量的水、石膏、粉煤灰、砂以及纳米二氧化硅,搅拌均匀,形成预混合物；S2、边搅拌边向预混合物中加入剩余组分,搅拌均匀,即得机喷聚合物抗裂抹灰砂浆。有利于提高机喷聚合物抗裂抹灰砂浆的粘结强度以及柔韧性,使得机喷聚合物抗裂抹灰砂浆更加不容易开裂,无需频繁修补,有利于节能环保。(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.)

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.

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.