CN116903322A

CN116903322A - Decorative mortar for forming flocked surface, decorative slurry, preparation and forming method

Info

Publication number: CN116903322A
Application number: CN202310704166.0A
Authority: CN
Inventors: 戴剑; 陈常明; 吴宇弘; 粟峰; 张学兵
Original assignee: Zoomlion New Material Technology Co ltd
Current assignee: Zoomlion New Material Technology Co ltd
Priority date: 2023-06-14
Filing date: 2023-06-14
Publication date: 2023-10-20

Abstract

The application provides decorative mortar for forming a flocked surface, a decorative slurry, a preparation method and a forming method. The decorative mortar comprises the following components in parts by mass: 19 to 23 parts of white cement, 9 to 11 parts of heavy calcium carbonate, 18 to 22 parts of first calcium sand, 23 to 27 parts of second calcium sand, 18 to 22 parts of third calcium sand, 1.5 to 2.5 parts of rubber powder, 0.18 to 0.22 part of water-retaining agent, 0.28 to 0.32 part of lignocellulose and 0.0019 to 0.0021 part of air entraining agent. The particle size of the first calcium sand is 20-40 meshes. The particle size of the second calcium sand is 40-70 meshes. The particle size of the third calcium sand is 70-140 meshes. According to the decorative mortar, the components and the proportions are reasonably arranged, so that on one hand, all performance indexes of a hardened mortar layer formed by the construction of the decorative mortar meet the requirements, and on the other hand, the calcium sand in the decorative mortar is proper in proportion, and the decorative mortar has proper viscosity corresponding to the mortar, so that the facing of the flocked surface is formed conveniently.

Description

Decorative mortar for forming flocked surface, decorative slurry, preparation and forming method

Technical Field

The application relates to the field of decorative mortar, in particular to decorative mortar for forming a flocked surface, a decorative slurry, a preparation method and a forming method.

Background

In recent years, interior decoration mainly uses putty and paint rolling, and the texture of the decorative surface of the interior wall is single. Decorative mortar refers to mortar used as a building finish. The decorative mortar can be processed to obtain a special facing form.

Among the various facing forms, one of the facing forms is called a flocked surface because of the uniform distribution of a plurality of grooves of shorter length and shallower depth on the surface. However, the facing formed by the construction of the common decorative mortar cannot show the effect of the flocked surface.

Disclosure of Invention

The application mainly aims to provide decorative mortar for forming a flocked surface, decorative slurry, a preparation method and a forming method, so as to solve the technical problems that the surface formed by common decorative mortar construction is easy to have uneven distribution and cannot show the effect of the flocked surface.

In order to achieve the above object, the present application provides a decorative mortar for forming a flocked surface, comprising, in parts by mass: 19 to 23 parts of white cement, 9 to 11 parts of heavy calcium carbonate, 18 to 22 parts of first calcium sand, 23 to 27 parts of second calcium sand, 18 to 22 parts of third calcium sand, 1.5 to 2.5 parts of rubber powder, 0.18 to 0.22 part of water-retaining agent, 0.28 to 0.32 part of lignocellulose and 0.0019 to 0.0021 part of air entraining agent.

Wherein the grain size of the first calcium sand is 20-40 meshes. The particle size of the second calcium sand is 40-70 meshes. The particle size of the third calcium sand is 70-140 meshes. The water-retaining agent comprises a first cellulose ether and a second cellulose ether, wherein the first cellulose ether is methyl cellulose ether with viscosity of 14000-16000 mPa.s, and the second cellulose ether is methyl cellulose ether with viscosity of 3000-5000 mPa.s.

According to an embodiment of the present application, the mass ratio of the first calcium sand, the second calcium sand and the third calcium sand is 4:5:4.

according to the embodiment of the application, the mass ratio of the white cement to the rubber powder is 21:2.

according to an embodiment of the application, the water retaining agent comprises a first cellulose ether and a second cellulose ether. The mass ratio of the first cellulose ether to the second cellulose ether is (12-14): (6-8).

The first cellulose ether is a methyl cellulose ether having a viscosity of 14000 to 16000 mPas. The second cellulose ether is a methyl cellulose ether having a viscosity of 3000 to 5000 mPas.

According to an embodiment of the present application, a decorative mortar includes, in parts by mass: 21 parts of white cement, 10 parts of heavy calcium, 20 parts of first calcium sand, 25 parts of second calcium sand, 20 parts of third calcium sand, 2 parts of rubber powder, 0.2 part of water-retaining agent, 0.3 part of lignocellulose and 0.002 part of air entraining agent.

According to the embodiment of the application, the decorative mortar further comprises 0.3 part of thixotropic lubricant, 0.2 part of water repellent, 0.1 part of sodium gluconate and 0.02 part of starch ether in parts by mass.

The application also provides a preparation method of the decorative mortar for forming the flocked surface, which comprises the following steps:

the raw materials are prepared according to the components and the proportions of the decorative mortar for forming the flocked surface.

And (3) stirring the raw materials except the first calcium sand, the second calcium sand and the third calcium sand according to the proportion under the conditions of stirring by a stirring mechanism and stirring by a fly cutter to obtain intermediate slurry.

And (3) stirring the intermediate slurry, the first calcium sand, the second calcium sand and the third calcium sand by a stirring mechanism to obtain the decorative mortar.

The application also provides a decorative slurry for forming the flocked surface, which comprises water and the decorative slurry, wherein the mass of the water is 23-25% of that of the decorative slurry.

The application also provides a method for forming the flocked surface, which comprises the following steps:

and spraying or coating the decorative slurry on a target base surface in a batch mode to form a mortar intermediate layer. The decorative slurry comprises water and the decorative mortar, wherein the mass of the water is 23-25% of that of the decorative mortar.

And pressing the construction surface and driving the pressed area of the construction surface to move so that the mortar intermediate layer forms a flocked surface, wherein the construction surface is the surface of the mortar intermediate layer far away from the target base surface.

According to an embodiment of the application, further comprising applying a finish to the batting surface.

According to the decorative mortar for forming the flocked surface, on one hand, various performance indexes of a hardened mortar layer formed by construction of the decorative mortar meet the requirements by reasonably setting the components and the proportions, and on the other hand, the calcium sand in the decorative mortar is proper in proportion, the diameter of the calcium sand is proper, and the decorative mortar has proper viscosity corresponding to the slurry, so that the decorative surface of the flocked surface is formed conveniently.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a flow chart of a method of preparing a decorative mortar for forming a flocked surface according to an embodiment of the application;

FIG. 2 is a flow chart of a batting-side formation process for forming a batting side according to one embodiment of the present application;

FIG. 3 is a physical view of a batting surface formed in accordance with one embodiment of the present application.

The achievement of the object, functional features and advantages of the present application will be further described with reference to the drawings in connection with the embodiments.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, are intended to fall within the scope of the present application.

It should be noted that all directional indicators (such as upper and lower … …) in the embodiments of the present application are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.

Moreover, the technical solutions of the embodiments of the present application may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the embodiments, and when the technical solutions are contradictory or cannot be implemented, it should be considered that the combination of the technical solutions does not exist, and is not within the scope of protection claimed by the present application.

The embodiment of the application provides decorative mortar for forming a flocked surface, which comprises the following components in parts by mass: 19 to 23 parts of white cement, 9 to 11 parts of heavy calcium carbonate, 18 to 22 parts of first calcium sand, 23 to 27 parts of second calcium sand, 18 to 22 parts of third calcium sand, 1.5 to 2.5 parts of rubber powder, 0.18 to 0.22 part of water-retaining agent, 0.28 to 0.32 part of lignocellulose and 0.0019 to 0.0021 part of air entraining agent. Wherein the grain size of the first calcium sand is 20-40 meshes. The particle size of the second calcium sand is 40-70 meshes. The particle size of the third calcium sand is 70-140 meshes. The water retaining agent comprises a first cellulose ether and a second cellulose ether, wherein the first cellulose ether is methyl cellulose ether with viscosity of 14000-16000 mPas, and the second cellulose ether is methyl cellulose ether with viscosity of 3000-5000 mPas.

The applicant found that there are three main factors affecting the effect of the fleece: the calcium sand has proper proportion, proper diameter and proper viscosity corresponding to the slurry. The following is a detailed description of specific raw materials.

White cement is also called white Portland cement, and refers to a hydraulic cementing material prepared by grinding white Portland cement clinker with low ferric oxide content, a proper amount of gypsum and mixed materials (limestone and kiln dust).

Heavy calcium carbonate is prepared by grinding natural carbonate mineral such as calcite, marble, and limestone. In some embodiments, the triple superphosphate is 300 mesh triple superphosphate. The heavy calcium carbonate can replace part of white cement, so that the cost of the decorative mortar can be reduced, and the alkali content of the decorative mortar can be reduced.

The calcic sand is brittle and will produce particle breakage at lower stress levels than the quartz sand. The grain size of the calcium sand is relatively easy to control. Thus, calcium sand having a relatively narrow particle size distribution range can be obtained as needed. In this embodiment, since the raw materials of the decorative mortar include several kinds of calcium sand having different particle diameters, the calcium sand is named as first, second, and third calcium sand, respectively, according to the difference in particle diameters for convenience of description. Wherein the grain size of the first calcium sand is 20-40 meshes. The particle size of the second calcium sand is 40-70 meshes. The particle size of the third calcium sand is 70-140 meshes.

The calcium sand ratio can be understood as the ratio of various kinds of calcium sand. The grain size of the calcium sand is relatively narrow in distribution range, so that the grain size requirement of the decorative mortar grading is more easily met. The sand grading is regulated to lead the mass ratio of the first calcium sand to the second calcium sand to the third calcium sand to be (18-22): (23-27): (18-22). Under the condition, the sand is in a continuous grading state, the decorative mortar is fully compact, and the initial anti-wind crack performance is ensured to meet the requirement.

The velvet surface comprises a leveling part and a groove part, and in the process of forming the facing, the leveling part which is relatively leveling and smooth can be formed better due to the fact that the decorative mortar is sufficiently compact. The first calcium sand has larger particles, and the groove part is mainly formed by the movement of the first calcium sand in the mortar when the first calcium sand is driven by pressure (such as rubbing by a wood board) in the construction process. The proper particle size and the proper ratio of the first calcium sand make the depth and the proper number of the groove parts. The apparent texture of the decorative surface is related to the doping amount of the first calcium sand, and the first calcium sand is finally determined to be 18-22 parts by weight through repeated construction texture verification.

Therefore, the smooth part and the groove part have obvious distinguishing degree, the difference between the smooth part and the groove part is not too large, the area ratio of the smooth part and the groove part is moderate, and the velvet surface is uniformly distributed in the smooth part and the groove part, so that the velvet surface has uniform texture.

Compared with quartz sand, the calcium sand has fewer impurities, so that the color of the calcium sand is relatively pure and is mainly white. The quartz sand has more impurities and is yellow in color. Therefore, the calcium sand is selected as the aggregate of the decorative mortar, so that the decorative effect is more attractive.

The rubber powder is redispersible emulsion powder, such as methyl acrylate, butyl acrylate, and 2-ethylhexyl acrylate

And (3) an acrylic compound monomer in ester, methacrylic acid, methyl methacrylate and hydroxyethyl methacrylate is subjected to emulsion polymerization to form a binary or ternary copolymer.

The gum powder is capable of complexing a portion of the free calcium ions, such as the calcium sand and the portion of the free calcium ions in the heavy calcium, after dispersion, to form a polymer particle that is externally coated with a polymer film. The part of the pore structure formed by the hardened mortar is filled with polymer particles. Thus, on one hand, the porosity of the hardened mortar can be reduced, and the water absorption of the hardened mortar is further reduced, so that the alkali return of the hardened mortar is favorably inhibited. On the other hand, microcracks in the low-hardening mortar can be reduced, so that the interfacial tensile bonding strength, the fracture resistance, the compression resistance and the like of the hardening mortar are improved.

On the basis, the applicant carries out a great deal of experiments on the contents of the white cement and the rubber powder, and confirms the proportion of the white cement and the rubber powder, so that the interface tensile bonding strength, the fracture resistance and the compression resistance of the decorative mortar are higher, and the alkali return of the hardened mortar is inhibited.

The water-retaining agent ensures that the decorative mortar has good water retention and thickening effects, and can obviously improve the workability of the mortar. In particular, the water-retaining agent can improve the working time of the decorative mortar, such as making it meet the requirement of more than 60 min. The water retaining agent can be one or more of cellulose ether such as methyl cellulose ether, carboxymethyl cellulose ether, hydroxypropyl methyl cellulose ether, starch ether or carboxyethyl cellulose ether.

And the construction is carried out after the mortar is stirred and is put on the wall to obtain the mortar intermediate layer, the construction surface is required to be pressed, and the pressed area of the construction surface is driven to move, so that the flocked surface is formed. Specifically, for example, the board is rubbed clockwise on the middle layer of the mortar, and the calcium sand (including the first calcium sand, the second calcium sand and the third calcium sand) in the middle layer of the mortar needs to rub along with the board, so as to slide out marks in the middle layer of the mortar.

In order to ensure that the mortar intermediate layer has the construction performance, the water-retaining agent is introduced into the facing mortar to reduce the viscosity of the mortar, and the air entraining agent is introduced to improve the smooth hand feeling of the facing mortar in construction. Specifically, the air entraining agent is also called an air entraining agent, and is a hydrophobic surfactant. During construction, the decorative mortar is mixed with water to form decorative slurry. In the stirring process of mixing, the air entraining agent can generate a large number of tiny bubbles when meeting water, so that the decorative slurry has good fluidity, and the viscosity of the mortar is reduced.

However, when the water-retaining agent is introduced, the mortar has insufficient operation time, and when the air entraining agent is introduced, the flexural strength, the compressive strength, the original tensile bonding strength, the aged tensile bonding strength and other properties of the mortar are reduced. The laboratory analyzes the mixing amount of the air entraining agent to ensure that the performance of the air entraining agent is qualified in advance, the construction property of facing mortar is met, and finally, the mass part of the mixing amount of the air entraining agent is 0.0019-0.0021 part.

The water retaining agent comprises a first cellulose ether and a second cellulose ether. The first cellulose ether is a methyl cellulose ether having a viscosity of 14000 to 16000 mPas, and the second cellulose ether is a methyl cellulose ether having a viscosity of 3000 to 5000 mPas.

The first cellulose ether is a methyl cellulose ether having a viscosity in the range of 14000 to 16000 mPas, such as a methyl cellulose ether having a viscosity of 14000 mPas, a methyl cellulose ether having a viscosity of 15000 mPas, a methyl cellulose ether having a viscosity of 16000 mPas, or the like.

The second cellulose ether is a methyl cellulose ether having a viscosity of 3000 to 5000 mPas. Such as a methyl cellulose ether having a viscosity of 3000 mPas, a methyl cellulose ether having a viscosity of 4000 mPas, a methyl cellulose ether having a viscosity of 5000 mPas, etc.

In the subsequent actual construction process, the decorative mortar provided by the embodiment of the application has good fluidity, meets the pumpability of mortar, and can be constructed by adopting a spraying process. The decorative mortar can be manually coated or sprayed. The decorative mortar is constructed by adopting a spraying process, so that the construction efficiency can be improved.

According to the decorative mortar for forming the flocked surface, on one hand, various performance indexes of a hardened mortar layer formed by construction of the decorative mortar meet the requirements by reasonably setting the components and the proportions, and on the other hand, the calcium sand in the decorative mortar is proper in proportion, the diameter of the calcium sand is proper, and the decorative mortar has proper viscosity corresponding to the slurry, so that the decorative surface of the flocked surface is formed conveniently. In addition, the decorative mortar for forming the flocked surface has better self-performance.

In some embodiments, the first, second, and third calcium sands have a mass ratio of 4:5:4. the decorative slurry for forming the flocked surface has the advantages that the distribution of the smooth part and the groove part of the flocked surface is more uniform, and the texture is more uniform.

In some embodiments, the mass ratio of white cement to rubber powder is 21:2. in the embodiment, the strength of the decorative mortar strength is further improved.

In some embodiments, the water retaining agent comprises a first cellulose ether and a second cellulose ether in a mass ratio of (12 to 14): (6-8), such as 13:7.

under the condition, the two types of viscosity methyl cellulose ether are mutually doped, and under the synergistic effect of the two types of viscosity methyl cellulose ether, the decorative mortar not only meets the requirement of operation time of more than 60 minutes, but also meets the requirement of initial drying crack resistance.

In some embodiments, the decorative mortar comprises, in parts by mass: 21 parts of white cement, 10 parts of heavy calcium, 20 parts of first calcium sand, 25 parts of second calcium sand, 20 parts of third calcium sand, 2 parts of rubber powder, 0.2 part of water-retaining agent, 0.3 part of lignocellulose and 0.002 part of air entraining agent.

The decorative mortar of the embodiment has the advantages that the operation time, the flexural strength, the 28d compressive strength and other performances reach the standard, and the distribution of the smooth part and the groove part of the velvet surface is more uniform, so that the texture is more uniform.

In some embodiments, the decorative mortar further comprises, in parts by mass, 0.3 part of a thixotropic lubricant, 0.2 part of a water repellent, 0.1 part of sodium gluconate, and 0.02 part of a starch ether.

And adding thixotropic lubricant, water repellent, sodium gluconate and starch ether with corresponding dosage into the decorative mortar. Illustratively, a decorative mortar comprises, in parts by mass: 21 parts of white cement, 10 parts of heavy calcium, 20 parts of first calcium sand, 25 parts of second calcium sand, 20 parts of third calcium sand, 2 parts of rubber powder, 0.13 part of methyl cellulose ether with viscosity of 15000 mPa.s, 0.07 part of methyl cellulose ether with viscosity of 4000 mPa.s, 0.3 part of lignocellulose, 0.002 part of air entraining agent, 0.3 part of thixotropic lubricant, 0.2 part of water repellent, 0.1 part of sodium gluconate and 0.02 part of starch ether.

The performance of the decorative mortar is further improved, and the decorative mortar meets the standard of the performances such as the operational time, the flexural strength, the 28d compressive strength, the original tensile bond strength, the aged cyclic tensile bond strength, the back alkalinity resistance, the stain resistance, the weather resistance and the like, and meets the JC/T1024-2019 index requirement, and the performance is qualified. And the corresponding smooth surface part and groove part of the hardened mortar are distributed more uniformly and uniformly, so that the rendering effect of the flocked surface is further improved.

The application also provides a preparation method of the decorative mortar for forming the flocked surface, which is shown in fig. 1, and comprises the following steps:

s11: the raw materials are prepared according to the components and the proportions of the decorative mortar for forming the flocked surface.

In the step, all raw materials are prepared according to the components and the proportion of the decorative mortar, and the proportion of any two raw materials is the ratio of corresponding raw materials in parts by mass.

S12: and (3) stirring the raw materials except the first calcium sand, the second calcium sand and the third calcium sand according to the proportion under the conditions of stirring by a stirring mechanism and stirring by a fly cutter to obtain intermediate slurry.

In this step, the decorative mortar may be prepared in a stirring device, such as a stirred tank, which includes both stirring mechanisms and fly blades. The stirring mechanism and fly cutter may operate independently of each other, such as with both operating simultaneously with stirring, and such as with only one operating with the other closed. Illustratively, only the stirring mechanism stirs and the fly cutter is closed. The frequency of the stirring device may be 50 hz during stirring.

Specifically, raw materials except the first calcium sand, the second calcium sand and the third calcium sand are firstly put into a stirring kettle. In some embodiments, white cement, heavy calcium carbonate, rubber powder, methyl cellulose ether with viscosity of 15000 mPa.s, methyl cellulose ether with viscosity of 4000 mPa.s, lignocellulose, air entraining agent, thixotropic lubricant, water repellent, sodium gluconate and starch ether are put into a stirring kettle and stirred under the conditions of double stirring of a stirring mechanism and fly cutter stirring to obtain intermediate slurry. The stirring period may be 160 to 200s, and is exemplified by 160s, 180s, 195s, 200s, etc.

S13: and (3) stirring the intermediate slurry, the first calcium sand, the second calcium sand and the third calcium sand by a stirring mechanism to obtain the decorative mortar.

In this step, the intermediate slurry and the calcium sand need to be mixed. The intermediate slurry is positioned in the stirrer, and for the purpose of convenient operation, the first calcium sand, the second calcium sand and the third calcium sand can be added into the stirring mechanism, and further stirred by the stirring mechanism. The stirring period may be 110 to 130s (fly blade in closed state), illustratively 110s, 113s, 120s, 127s, 130s, etc. Therefore, the components in the decorative mortar are uniformly mixed.

The decorative mortar for forming the flocked surface is understood to be a mortar which does not include water in the composition, i.e. a dry decorative mortar. The decorative slurry for forming the flocked surface is understood to be a mortar comprising water in the composition, i.e. a wet decorative mortar. Wherein the mass of the water is 23-25% (e.g. 24%) of the mass of the decorative mortar.

The decorative sizing agent can be prepared by blending decorative mortar and water, for example, the water with the mass of 23-25% is added into the decorative mortar, and the mixture is stirred until the materials are uniformly mixed, so as to obtain the decorative sizing agent.

The decorative slurry has qualified self performance and good pumpability, is suitable for construction requirements of a spraying process, and can form a flocked surface by spraying.

and S21, spraying or coating the decorative slurry on a target base surface in a batch mode to form a mortar intermediate layer. The decorative slurry comprises water and the decorative mortar, wherein the mass of the water is 23-25% (e.g. 24%) of the mass of the decorative mortar.

The decorative slurry can be purchased prepared decorative slurry or prepared by preparing decorative mortar and water on site. The target base surface is a building surface for forming a flocked surface, such as an outer wall surface, an inner wall surface, and the like.

The decorative sizing agent can be subjected to initial construction in a spraying or batch coating mode to obtain the mortar intermediate layer. The decorative sizing agent is placed in spraying equipment in a spraying mode, so that construction is performed, and the construction efficiency is improved.

And S22, pressing the construction surface and driving the pressed area of the construction surface to move so that the mortar intermediate layer forms a flocked surface, wherein the construction surface is the surface of the mortar intermediate layer far away from the target base surface.

A certain pressure is applied to the surface of the mortar intermediate layer, which is far away from the target base surface, such as a plate (e.g. a wood plate, a plastic plate, a metal plate) is pressed on the construction surface, and then the plate is moved, such as rotated (clockwise rotation or anticlockwise rotation), so that the construction surface moves along with the contact part of the plate and the pressed area, and a trace is formed in the mortar intermediate layer, thereby forming a flocked surface.

In some embodiments, referring to fig. 2, further comprising applying a finish to the batting surface. The finishing agent can protect the fluff surface and reduce the alkali return probability of the fluff surface.

In some embodiments, the method further comprises pre-treating the target base surface. Referring to fig. 2, if preparation for construction is performed, a leveling process may be specifically performed for the target base surface. If the construction preparation is finished, the alkali-resistant primer is roll-coated.

The technical scheme of the present application will be described in detail with reference to specific examples and comparative examples.

Example 1

The decorative mortar for forming the flocked surface comprises the following components in parts by mass:

22 parts of white cement, 10 parts of heavy calcium, 20 parts of first calcium sand, 25 parts of second calcium sand, 20 parts of third calcium sand, 2 parts of rubber powder, 0.17 part of first cellulose ether, 0.03 part of second cellulose ether, 0.3 part of lignocellulose, 0.002 part of air entraining agent, 0.3 part of thixotropic lubricant, 0.2 part of water repellent, 0.1 part of sodium gluconate and 0.02 part of starch ether.

The preparation method of the decorative mortar for forming the flocked surface comprises the following steps:

s101: raw materials are prepared according to the components and the proportions of the decorative mortar for forming the flocked surface.

S102: and (3) stirring the raw materials except the first calcium sand, the second calcium sand and the third calcium sand for 180 seconds according to the proportion under the conditions of stirring by a stirring mechanism and stirring by a fly cutter to obtain intermediate slurry.

S103: and (3) stirring the intermediate slurry, the first calcium sand, the second calcium sand and the third calcium sand for 120 seconds by a stirring mechanism to obtain the decorative mortar for forming the flocked surface.

The construction method for forming the decorative mortar with the flocked surface comprises the following steps:

s110: and spraying or coating the decorative slurry on a target base surface in a batch mode to form a mortar intermediate layer. The decorative slurry comprises water and the decorative mortar, wherein the mass of the water is 24% of that of the decorative mortar.

S120: the sand in the mortar intermediate layer is rubbed with the wood board by clockwise circle rubbing on the construction surface, and the sand slides out of the trace in the mortar, so that the mortar intermediate layer forms a flocked surface, and the construction surface is the surface of the mortar intermediate layer far away from the target base surface.

Example 2

The decorative mortar for forming the flocked surface comprises the following components in parts by mass: 19 parts of white cement, 11 parts of heavy calcium, 18 parts of first calcium sand, 27 parts of second calcium sand, 18 parts of third calcium sand, 2.5 parts of rubber powder, 0.32 part of lignocellulose, 0.0021 part of air entraining agent, 0.16 part of first cellulose ether, 0.04 part of second cellulose ether, 0.3 part of thixotropic lubricant, 0.2 part of water repellent, 0.1 part of sodium gluconate and 0.02 part of starch ether.

S102: and (3) stirring the raw materials except the first calcium sand, the second calcium sand and the third calcium sand for 190 seconds according to the proportion under the conditions of stirring by a stirring mechanism and stirring by a fly cutter to obtain intermediate slurry.

S103: and (3) stirring the intermediate slurry, the first calcium sand, the second calcium sand and the third calcium sand for 110 seconds by a stirring mechanism to obtain the decorative mortar for forming the flocked surface.

s110: and spraying or coating the decorative slurry on a target base surface in a batch mode to form a mortar intermediate layer. The decorative slurry comprises water and the decorative mortar, wherein the mass of the water is 23% of that of the decorative mortar.

Example 3

The decorative mortar for forming the flocked surface comprises the following components in parts by mass: 23 parts of white cement, 9 parts of heavy calcium, 22 parts of first calcium sand, 23 parts of second calcium sand, 22 parts of third calcium sand, 1.5 parts of rubber powder, 0.32 part of lignocellulose, 0.0019 part of air entraining agent, 0.18 part of first cellulose ether, 0.02 part of second cellulose ether, 0.3 part of thixotropic lubricant, 0.2 part of water repellent, 0.1 part of sodium gluconate and 0.02 part of starch ether.

S102: and (3) stirring the raw materials except the first calcium sand, the second calcium sand and the third calcium sand according to the proportion under the conditions of stirring by a stirring mechanism and stirring by a fly cutter for 170s to obtain intermediate slurry.

S103: and (3) stirring the intermediate slurry, the first calcium sand, the second calcium sand and the third calcium sand for 130s by a stirring mechanism to obtain the decorative mortar for forming the flocked surface.

s110: and spraying or coating the decorative slurry on a target base surface in a batch mode to form a mortar intermediate layer. The decorative slurry comprises water and the decorative mortar, wherein the mass of the water is 22% of that of the decorative mortar.

Example 4

The decorative mortar for forming the flocked surface comprises the following components in parts by mass: 22 parts of white cement, 9.5 parts of heavy calcium carbonate, 19 parts of first calcium sand, 25 parts of second calcium sand, 21 parts of third calcium sand, 1.8 parts of rubber powder, 0.31 part of lignocellulose, 0.002 part of air entraining agent, 0.18 part of first cellulose ether, 0.04 part of second cellulose ether, 0.3 part of thixotropic lubricant, 0.2 part of water repellent, 0.1 part of sodium gluconate and 0.02 part of starch ether.

s110: and spraying or coating the decorative slurry on a target base surface in a batch mode to form a mortar intermediate layer. The decorative slurry comprises water and the decorative mortar, wherein the mass of the water is 25% of that of the decorative mortar.

Comparative example 1

The difference from example 1 is only that in the decorative mortar for forming the flocked surface, the white cement is 17 parts and the rubber powder is 3 parts. The remaining components and steps are identical.

Comparative example 2

The difference from example 1 was only that in the decorative mortar for forming a flocked surface, the first calcium sand was 15 parts, the second calcium sand was 16 parts, and the third calcium sand was 14 parts. The remaining components and steps are identical.

Comparative example 3

The difference from example 1 was only that in the decorative mortar for forming a flocked surface, the first calcium sand was 24 parts, the second calcium sand was 12 parts, and the third calcium sand was 10 parts. The remaining components and steps are identical.

Comparative example 4

The only difference from example 1 is that in the decorative mortar for forming the flocked surface, only 0.017 parts of the first cellulose ether is included. The remaining components and steps are identical.

Performance testing

The respective decorative mortars of examples 1 to 4 and the respective decorative mortars of comparative examples 1 to 4 were tested for their respective properties. The working time, the initial drying crack resistance, the water absorption for 30min, the water absorption for 240min, the breaking strength for 28d, the compressive strength for 28d, the tensile bond strength, the aging cycle tensile bond strength, the back alkalinity resistance, the stain resistance and the weather resistance (750 h) are all tested according to the JC/T1024-2019 standard.

Wherein, the index requirements are as follows:

operational time: no obstacle is generated in the process of coating and scraping for 60 min; initial dry crack resistance: no crack; the water absorption capacity is less than or equal to 2g after 30 min; the water absorption capacity is less than or equal to 5g after 240 min; 28d, the flexural strength is more than or equal to 2.5MPa; the compressive strength of 28d is more than or equal to 4.5MPa; the tensile bond strength is more than or equal to 0.5MPa; the ageing cyclic tensile bonding strength is more than or equal to 0.4MPa; resistance to back alkalinity: no visible whiskering and no powder falling; the stain resistance is less than or equal to grade 2; weather resistance (750 h) is less than or equal to 1 grade.

The test results are shown in Table 1.

Table 1 table of results of performance test of each decorative mortar

As can be seen from table 1, in comparative example 1, the ratio of white cement to rubber powder is not suitable, so that the aging cycle tensile bond strength of the corresponding decorative mortar does not meet the JC/T1024-2019 requirement.

In comparative example 2, the initial drying crack resistance of the corresponding decorative mortar does not meet the JC/T1024-2019 requirement due to unsuitable proportion of the calcium sand.

In comparative example 3, the initial drying crack resistance of the corresponding decorative mortar does not meet the JC/T1024-2019 requirement due to unsuitable proportion of the calcium sand.

Comparative example 4 does not meet the JC/T1024-2019 requirements for the operational time and initial drying crack resistance of the corresponding decorative mortar due to improper proportion of the fiber ether.

The decorative mortars for forming the flocked surface provided in examples 1 to 4 were satisfactory in terms of working time, initial drying crack resistance, 30min water absorption, 240min water absorption, 28d flexural strength, 28d compressive strength, tensile bond strength, aged cyclic tensile bond strength, alkali return resistance, stain resistance, and weather resistance (750 h), and satisfied JC/T1024-2019. The flocked surface obtained by the construction method of the decorative mortar of example 1 is shown in fig. 3. Fig. 3 shows that the smooth portion and the grooved portion of the facing are uniformly distributed, the texture is uniform, and the rendering effect of the flocked surface is good.

In the above technical solution of the present application, the above is only a preferred embodiment of the present application, and therefore, the patent scope of the present application is not limited thereto, and all the equivalent structural changes made by the description of the present application and the content of the accompanying drawings or the direct/indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A decorative mortar for forming a flocked surface, characterized by comprising, in parts by mass: 19-23 parts of white cement, 9-11 parts of heavy calcium carbonate, 18-22 parts of first calcium sand, 23-27 parts of second calcium sand, 18-22 parts of third calcium sand, 1.5-2.5 parts of rubber powder, 0.18-0.22 part of water-retaining agent, 0.28-0.32 part of lignocellulose and 0.0019-0.0021 part of air entraining agent;

wherein the grain size of the first calcium sand is 20-40 meshes, the grain size of the second calcium sand is 40-70 meshes, and the grain size of the third calcium sand is 70-140 meshes; the water-retaining agent comprises a first cellulose ether and a second cellulose ether, wherein the first cellulose ether is methyl cellulose ether with viscosity of 14000-16000 mPa.s, and the second cellulose ether is methyl cellulose ether with viscosity of 3000-5000 mPa.s.

2. The decorative mortar of claim 1, wherein the mass ratio of the first, second, third, and calcium sands is 4:5:4.

3. the decorative mortar of claim 1, wherein the mass ratio of the white cement to the rubber powder is 21:2.

4. the decorative mortar of claim 1, wherein the mass ratio of the first cellulose ether to the second cellulose ether is (12-14): (6-8).

5. The decorative mortar according to claim 1, wherein the decorative mortar comprises, in parts by mass: 21 parts of white cement, 10 parts of heavy calcium, 20 parts of first calcium sand, 25 parts of second calcium sand, 20 parts of third calcium sand, 2 parts of rubber powder, 0.2 part of water-retaining agent, 0.3 part of lignocellulose and 0.002 part of air entraining agent.

6. The decorative mortar according to any one of claims 1 to 5, further comprising, in parts by mass, 0.3 part of a thixotropic lubricant, 0.2 part of a water repellent, 0.1 part of sodium gluconate and 0.02 part of starch ether.

7. A method for preparing decorative mortar for forming a flocked surface, comprising the steps of:

preparing raw materials for components and proportions of the decorative mortar for forming a flocked surface according to any one of claims 1 to 6;

mixing the raw materials except the first calcium sand, the second calcium sand and the third calcium sand according to the proportion under the conditions of stirring by a stirring mechanism and stirring by a fly cutter to obtain intermediate slurry;

and stirring the intermediate slurry, the first calcium sand, the second calcium sand and the third calcium sand by a stirring mechanism to obtain the decorative mortar.

8. A decorative slurry for forming a flocked surface, comprising water and the decorative mortar of any one of claims 1 to 6, the mass of the water being 23 to 25% of the mass of the decorative mortar.

9. A method of forming a fleece surface comprising the steps of:

spraying or coating the decorative slurry on a target base surface in a batch mode to form a mortar intermediate layer; the decorative slurry comprises water and the decorative mortar of any one of claims 1 to 6, wherein the mass of the water is 23 to 25% of the mass of the decorative mortar;

and pressing the construction surface and driving the pressed area of the construction surface to move so that the mortar intermediate layer forms the flocked surface, wherein the construction surface is the surface of the mortar intermediate layer, which is far away from the target base surface.

10. The method of claim 9 further including applying a finish to the batt surface.