阅读说明：本技术 一种轻质抹灰石膏界面剂及其应用 (Light plastering gypsum interface agent and application thereof ) 是由 王齐 任伟华 郁晨阳 沈军军 汪思孝 于 2021-11-08 设计创作，主要内容包括：本发明公开了一种轻质抹灰石膏界面剂及其应用。本发明所述轻质抹灰石膏界面剂由以下质量份数组分组成：20-40份丙烯酸乳液,3-6份纳米二氧化硅,45-55份水和5-8份SBS纤维。本发明所述的轻质抹灰石膏界面剂,能够很好的修补基层孔隙,提高基层强度,同时形成柔性防护层,在轻质抹灰石膏形成抹灰层,抹灰层或基层产生应力应变时,柔性防护层能够缓冲应力应变,避免抹灰层开裂。最终制备得到的产品环保无气味、抗裂性能好、具有保温隔热效果,特别适用于墙面平整度偏差较大的基层找平使用。(The invention discloses a light plastering gypsum interface agent and application thereof. The light plastering gypsum interface agent disclosed by the invention comprises the following components in parts by weight: 20-40 parts of acrylic emulsion, 3-6 parts of nano silicon dioxide, 45-55 parts of water and 5-8 parts of SBS fiber. The light plastering gypsum interface agent can well repair the pores of the base layer, improve the strength of the base layer, and simultaneously form the flexible protective layer, when the light plastering gypsum forms the plastering layer, and the plastering layer or the base layer generates stress strain, the flexible protective layer can buffer the stress strain, so that the plastering layer is prevented from cracking. The finally prepared product is environment-friendly, odorless, good in crack resistance, good in heat preservation and insulation effect, and particularly suitable for leveling base layers with large wall surface flatness deviation.)

1. The light plastering gypsum interface agent is characterized by comprising the following raw materials in parts by weight:

2. the application of the light plastering gypsum interfacial agent is characterized by comprising the following steps:

(1) pretreating a wall material, paving glass fiber mesh cloth at an interface joint of a pretreated wall, and dotting the glass fiber mesh cloth by using light plastering gypsum to form gypsum dots;

(2) uniformly stirring light plastering gypsum and water between the gypsum points in the same vertical direction to form ridges, and coating a light plastering gypsum interface agent between the adjacent ridges to form a wall surface to be plastered;

(3) uniformly stirring the light plastering gypsum and water, and spraying the light plastering gypsum on the wall surface to be plastered;

(4) manually supplementing ash, trimming internal and external corners, and maintaining.

3. The use according to claim 2, wherein the lightweight plastering gypsum consists of the following raw materials in parts by weight: 75-85 parts of gypsum, 5-15 parts of vitrified micro bubbles, 5-15 parts of activated calcium powder and superfine calcium carbonate, 5-15 parts of fly ash material, 1-3 parts of hydroxypropyl methyl cellulose, 1-3 parts of citric acid, 45-55 parts of water and 5-15 parts of vinyl acetate-ethylene emulsion.

4. The use of claim 3, wherein the ratio of the activated calcium powder to the superfine calcium carbonate is 1: 2-4.

5. The use according to claim 2, wherein in step (2) or (3), the mass ratio of the lightweight plastering gypsum to the water is 1: 0.24-0.4.

6. The use according to claim 2, wherein in step (2), the width of the ridge is 20-50mm, and the distance between adjacent ridges is 0.8-1.3 m.

7. The use according to claim 2, wherein in step (2), the lightweight plastering gypsum interface agent is coated between adjacent ridges by roller coating with a roller.

8. The use according to claim 2, wherein in step (2), the light-weight plastering gypsum interfacial agent is coated to a thickness of 2-5 mm.

9. The use according to claim 2, characterized in that in step (3), the spraying is carried out in a vertical spraying manner at a distance of 10-20cm from the wall surface to be plastered.

10. The use according to claim 2, wherein in step (3), the thickness of the spray coating is 45-65mm, and the coating is scraped off after 10-20 min.

Technical Field

The invention belongs to the field of building construction materials, and relates to a light plastering gypsum interface agent and application thereof.

Background

For the wall with larger breadth, in order to improve the construction efficiency, the construction is accelerated by adopting a machine spraying mode, however, when the machine spraying operation is carried out, the spraying of the light plastering gypsum is completed at one time, because the compressed air participates in the spraying, the gypsum mortar contains a large amount of compressed air, the air can not completely escape in the process that the gypsum mortar leaves a spray gun to reach the wall surface, and after the air is sprayed to the wall surface, because the gypsum mortar has large viscosity and strong caking property, the air is locked in the solid dry mortar, and the air is required to be removed for a certain time, and a large amount of bubbles and pinholes can be generated in the discharging process.

Even if the machine spraying method is not adopted, although the quantity of the bubbles can be synchronously reduced, the interlayer is formed because the plastering layer is not tightly contacted with the base layer, and a large quantity of bubbles can still be generated on the surface of the plastering layer under the long-term thermal expansion of air in the interlayer.

The light plastering gypsum is also called light plastering gypsum, is a novel efficient and energy-saving plastering material for building interior walls and roofs, replaces plastering materials such as cement, lime mortar and the like, is suitable for various walls, has strong bonding force, can be bonded with any base material, is not limited by thickness, has good workability, fluidity, water retention and low-temperature construction, is environment-friendly, odorless, good in crack resistance and good in heat preservation and heat insulation effects, and is particularly suitable for leveling base layers with large wall surface flatness deviation.

The interfacial agent is formed by treating the surface of the object, which may be physically acting adsorption or coating, and often also by physicochemical action. The aim is to improve or completely modify the physico-technical properties and surface chemical properties of the material surface.

Products aimed at modifying the physicochemical properties of the interface of an object are called interface agents. The surface treatment of an object to improve the surface properties of the material is called surface treatment. The interfacial agent is applied in different fields, the technical means and purposes of the surface treatment of the object are different, and the treatment and modification of the object interface by the common interfacial agent can be divided into four technical types: wetting and impregnation, coating treatment, coupling agent treatment and surface modification.

The existing light plastering gypsum and the construction method thereof can cause bubbles to remain between the gypsum layer and the base layer, and can destroy the gypsum layer structure under the influence of the thermal expansion and cold contraction principle and the stress and strain of the base layer and the gypsum layer, thereby influencing the construction quality.

Disclosure of Invention

The invention aims to enable the light plastering gypsum to have good anti-cracking performance through the light plastering gypsum interfacial agent, and also be better combined with a base layer, thereby avoiding the generation of bubbles and solving the current technical problem.

In order to achieve the purpose, the invention aims to provide a light plastering gypsum interface agent which comprises the following raw materials in parts by weight:

the invention provides an application of a light plastering gypsum interface agent, which is characterized by comprising the following steps:

(1) pretreating a wall material, paving glass fiber mesh cloth at an interface joint of a pretreated wall, and dotting the glass fiber mesh cloth by using light plastering gypsum to form gypsum dots;

(2) uniformly stirring light plastering gypsum and water between the gypsum points in the same vertical direction to form ridges, and coating a light plastering gypsum interface agent between the adjacent ridges to form a wall surface to be plastered;

(3) uniformly stirring the light plastering gypsum and water, and spraying the light plastering gypsum on the wall surface to be plastered;

(4) manually supplementing ash, trimming internal and external corners, and maintaining.

Further, the light plastering gypsum comprises the following raw materials in parts by weight: 75-85 parts of gypsum, 5-15 parts of vitrified micro bubbles, 5-15 parts of activated calcium powder and superfine calcium carbonate, 5-15 parts of fly ash material, 1-3 parts of hydroxypropyl methyl cellulose, 1-3 parts of citric acid, 45-55 parts of water and 5-15 parts of vinyl acetate-ethylene emulsion.

Further, the proportion of the active calcium powder to the superfine calcium carbonate is 1: 2-4, preferably 1: 3. the grain size of the superfine calcium carbonate is 0.02-0.1 mu m.

Further, in the step (2) or (3), the mass ratio of the light plastering gypsum to the water is 1: 0.24-0.4.

Further, in the step (2), the width of the ridge is 20-50mm, and the distance between adjacent ridges is 0.8-1.3 m.

Further, in the step (1), the pretreatment method comprises the steps of cleaning impurities on the surface of the wall material base layer, finishing defects of the base layer of the concave-convex part and the non-reserved hole, and protecting the embedded part, the reserved hole and the door and window part by using a shelter.

Further, in the step (2), the light plastering gypsum interface agent is coated between the ridges by adopting a roller coating process, so that the roughness between the ridges is increased, the flowing filling performance of the light plastering gypsum is better, the interface layer and the plastering layer can be tightly combined, and the phenomenon that a certain interlayer is formed due to the fact that the plastering layer is not tightly contacted with the base layer and a large amount of bubbles are generated on the surface of the plastering layer under long-term thermal expansion of air in the interlayer is avoided, so that the structure of the gypsum layer is firmer, and the construction quality is greatly improved.

Further, in the step (2), the coating thickness of the light plastering gypsum interface agent is 2-5 mm.

Further, in the step (3), a vertical spraying mode is adopted, and spraying is carried out at a position 10-20cm away from the wall surface to be plastered.

Further, in the step (3), the spraying sequence is from top to bottom and from left to right, the spraying thickness is 45-65mm, and the coating is scraped off after 10-20 min.

Compared with the prior art, the technical scheme of the invention has the following advantages:

1. the acrylic emulsion, the nano silicon dioxide and the SBS fiber compounded interface agent can well repair base layer pores, improve base layer strength, and simultaneously form a flexible protective layer, so that a plastering layer is formed by light plastering gypsum, and when the plastering layer or the base layer generates stress strain, the flexible protective layer can buffer the stress strain, and the plastering layer is prevented from cracking.

2. When the interface agent added with the nano silicon dioxide and the SBS fiber forms an interface layer through the napping roller, the surface is rough, the connecting nodes are more, after the light plastering gypsum containing the vinyl acetate-ethylene emulsion is sprayed and leveled, the overall flowing filling performance is better, the interface layer and the plastering layer can be tightly combined, the generation of bubbles is avoided, and the construction quality is improved.

3. Through the modified light plastering gypsum and the interface agent, even if gas diffuses towards the flexible gypsum layer side on the base layer side, the good flexibility can prevent the base layer side from damaging the gypsum layer and the decorative structure of the outer layer of the gypsum layer.

Detailed Description

The present invention is further described below in conjunction with specific examples to enable those skilled in the art to better understand the present invention and to practice it, but the examples are not intended to limit the present invention.

Example 1

An interface agent is composed of the following raw materials: 20g of acrylic emulsion, 3g of nano silicon dioxide, 45g of water and 5g of SBS fiber. A light plastering gypsum consists of the following raw materials: 75g of gypsum, 5g of vitrified micro bubbles, 2g of activated calcium powder, 6g of superfine calcium carbonate, 5g of fly ash material, 1g of hydroxypropyl methyl cellulose, 1g of citric acid, 45g of water and 5g of vinyl acetate-ethylene emulsion.

Use of a building interior wall and ceiling plastering application: cleaning up sundries such as dust, dirt and oil stains on the surface of the base layer, finishing the defects of the base layer such as concave-convex parts of the base layer and non-reserved holes, and protecting parts such as embedded parts, reserved holes, doors and windows by using shelters. And then laying glass fiber mesh cloth at the interface joints of different wall materials and the lintel of the door and the window. And then, using a laser positioning instrument to assist in dotting, ensuring the sag and the flatness, and dotting by using gypsum which is the same as the first type of light plastering gypsum to form a square shape. Then, 10g of light plastering gypsum and 2.4g of water are uniformly stirred between the gypsum points in the same vertical direction to manufacture the ridge, the width of the ridge is 20mm, and the distance between every two adjacent ridges is 0.8 m. And (3) checking the verticality and the flatness of the ribs, then using a roughening roller for roll coating construction, and uniformly spraying the interface agent on the wall surface to be plastered, wherein the thickness is 2 mm. Stirring 10g of light plastering gypsum and 2.4g of water uniformly, wherein a spray nozzle is vertical to a base layer surface during spraying and is 10cm away from the base layer surface, the spraying sequence is from top to bottom and from left to right, the spraying thickness is 45mm, and the plaster is scraped off by using a scraper 10min after spraying. And finally, manually supplementing ash, finishing internal and external corners and maintaining.

Example 2

An interface agent is composed of the following raw materials: 30g of acrylic emulsion, 4g of nano silicon dioxide, 50g of water and 7g of SBS fiber. A light plastering gypsum consists of the following raw materials: 80g of gypsum, 10g of vitrified micro bubbles, 3g of activated calcium powder, 9g of superfine calcium carbonate, 10g of fly ash material, 2g of hydroxypropyl methyl cellulose, 2g of citric acid, 50g of water and 10g of vinyl acetate-ethylene emulsion.

Use of a building interior wall and ceiling plastering application: cleaning up sundries such as dust, dirt and oil stains on the surface of the base layer, finishing the defects of the base layer such as concave-convex parts of the base layer and non-reserved holes, and protecting parts such as embedded parts, reserved holes, doors and windows by using shelters. And then laying glass fiber mesh cloth at the interface joints of different wall materials and the lintel of the door and the window. And then, using a laser positioning instrument to assist in dotting, ensuring the sag and the flatness, and dotting by using gypsum which is the same as the first type of light plastering gypsum to form a square shape. Then, 10g of light plastering gypsum and 3.6g of water are uniformly stirred between the gypsum points in the same vertical direction to manufacture a ridge, the width of the ridge is 30mm, and the distance between every two adjacent ridges is 1 m. And (3) checking the verticality and the flatness of the ribs, then using a roughening roller for roll coating construction, and uniformly spraying the interface agent on the wall surface to be plastered, wherein the thickness is 5 mm. Stirring 10g of light plastering gypsum and 3.6g of water uniformly, wherein a spray nozzle is vertical to a base layer surface during spraying and is 20cm away from the base layer surface, the spraying sequence is from top to bottom and from left to right, the spraying thickness is 65mm, and the plaster is scraped off 20min after spraying by using a scraping ruler. And finally, manually supplementing ash, finishing internal and external corners and maintaining.

Example 3

An interface agent is composed of the following raw materials: 40g of acrylic emulsion, 6g of nano silicon dioxide, 55g of water and 8g of SBS fiber. A light plastering gypsum consists of the following raw materials: 85g of gypsum, 15g of vitrified micro bubbles, 3.5g of activated calcium powder, 10.5g of superfine calcium carbonate, 15g of fly ash material, 3g of hydroxypropyl methyl cellulose, 3g of citric acid, 55g of water and 15g of vinyl acetate-ethylene emulsion.

Use of a building interior wall and ceiling plastering application: cleaning up sundries such as dust, dirt and oil stains on the surface of the base layer, finishing the defects of the base layer such as concave-convex parts of the base layer and non-reserved holes, and protecting parts such as embedded parts, reserved holes, doors and windows by using shelters. And then laying glass fiber mesh cloth at the interface joints of different wall materials and the lintel of the door and the window. And then, using a laser positioning instrument to assist in dotting, ensuring the sag and the flatness, and dotting by using gypsum which is the same as the first type of light plastering gypsum to form a square shape. Then, 10g of light plastering gypsum and 4.4g of water are uniformly stirred between the gypsum points in the same vertical direction to manufacture the ridge, the width of the ridge is 50mm, and the distance between every two adjacent ridges is 1.3 m. And (3) checking the verticality and the flatness of the ribs, then using a roughening roller for roll coating construction, and uniformly spraying the interface agent on the wall surface to be plastered, wherein the thickness is 4 mm. Stirring 10g of light plastering gypsum and 4.4g of water uniformly, wherein a spray nozzle is vertical to a base layer surface during spraying and is 15cm away from the base layer surface, the spraying sequence is from top to bottom and from left to right, the spraying thickness is 55mm, and the plaster is scraped off by using a scraper 10min after spraying. And finally, manually supplementing ash, finishing internal and external corners and maintaining.

Comparative example 1

Use of a building interior wall and ceiling plastering application: cleaning up sundries such as dust, dirt and oil stains on the surface of the base layer, finishing the defects of the base layer such as concave-convex parts of the base layer and non-reserved holes, and protecting parts such as embedded parts, reserved holes, doors and windows by using shelters. And then laying glass fiber mesh cloth at the interface joints of different wall materials and the lintel of the door and the window. And then, using a laser positioning instrument to assist in dotting, ensuring the sag and the flatness, and dotting by using gypsum which is the same as the first type of light plastering gypsum to form a square shape. Then, 10g of light plastering gypsum and 2.4g of water are uniformly stirred between the gypsum points in the same vertical direction to manufacture the ridge, the width of the ridge is 20mm, and the distance between every two adjacent ridges is 0.8 m. And (5) checking the verticality and the flatness of the ribs, and then performing roller coating construction by using a napping roller. Stirring 10g of light plastering gypsum and 2.4g of water uniformly, wherein a spray nozzle is vertical to a base layer surface during spraying and is 15cm away from the base layer surface, the spraying sequence is from top to bottom and from left to right, the spraying thickness is 55mm, and the plaster is scraped off by using a scraper 10min after spraying. And finally, manually supplementing ash, finishing internal and external corners and maintaining.

Effect evaluation 1

The construction method of the lightweight plastering gypsum provided by the examples 1, 2 and 3 and the comparative example 1 is used for detecting the strength of the constructed base layer, and the strength improvement percentage is as follows:

example 1	Example 2	Example 3	Comparative example 1
				98.2％	98.4％	98.6％	70％

The construction method of the lightweight plastering gypsum provided in examples 1, 2 and 3 and comparative example 1 detects the flow filling performance, and the percentage improvement of the flow filling performance is as follows:

example 1	Example 2	Example 3	Comparative example 1
				95.4％	95.5％	95.7％	76.8％

The post-construction test report is as follows:

in the prior art, after rubber powder is soaked by a bisamino silane coupling agent, polyethylene ester type epoxy resin and EVA emulsion are added and mixed with the rubber powder to improve the binding force of the rubber powder and a gypsum material, so that the strength of the obtained gypsum-based building external wall insulation material is improved; and the treated rubber powder is mixed with aluminum powder, hydrated calcium sulphoaluminate and nano-silica, so that the compatibility with a gypsum substrate is good. However, the invention does not solve the problems that when the light plastering gypsum machine is used for spraying, compressed air participates in spraying, the gypsum mortar contains a large amount of compressed air, and after the compressed air is sprayed onto the wall surface, the air is locked in the solid dry mortar due to the large viscosity and strong caking property of the gypsum mortar, so that a certain time is required for removing, a large amount of air bubbles are generated in the discharging process, and the phenomena of pinholes and plastering layer cracking under the action of stress strain for a long time are generated.

The interface agent prepared by mixing acrylic emulsion, nano silicon dioxide, water and SBS fiber is uniformly sprayed on the wall surface to be plastered in advance, so that the interface agent forms a flexible protective layer on the wall surface to be plastered, when a plastering layer or a base layer generates stress strain, the flexible protective layer can buffer the stress strain, the phenomenon that the plastering layer cracks is avoided, and meanwhile, when the light plastering gypsum is sprayed and scraped by a rough-surface roughening roller in the plastering process, the flowing filling performance of the light plastering gypsum is better due to the combination of vinyl acetate-ethylene emulsion in the light plastering gypsum, the interface layer and the plastering layer can be tightly combined, the generation of bubbles is avoided, and the construction quality is improved.

Although nano silicon dioxide and EVA are also added in the prior art, the bonding force and strength of the material are improved, the light plastering gypsum has better flow filling performance due to the compounding of the vinyl acetate-ethylene emulsion, and the interface layer and the plastering layer can be tightly combined, so that bubbles are avoided, the construction quality is improved, and a better effect is achieved.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the spirit or scope of the invention.