阅读说明：本技术 一种聚合物彩色饰面砂浆的制备方法 (Preparation method of polymer color facing mortar ) 是由 秦吉 张猛 于真 于 2021-09-16 设计创作，主要内容包括：本发明提供了一种聚合物彩色饰面砂浆的制备方法,该饰面砂浆包含质量份数为：75—90份铝酸盐水泥,15—25份石膏,5—10份纳米二氧化硅,10—15份重钙粉,250—350份砂,5—8份乳胶粉,2—4份颜料,0.2—0.6份纤维素醚,0.1—0.3份消泡剂,10—15份的乳液,60—70份的水。本发明选用铝酸盐水泥作为主要胶凝材料,从根本上避免了可溶性盐Ca(OH)-(2)的产生,并且乳液的加入具有疏水效果,可减少可溶性盐在饰面砂浆中的的迁移,对饰面砂浆泛碱具有较强的抑制效果；本发明可以实现对饰面砂浆泛碱的抑制,其各项性能均符合饰面砂浆标准,并且具有强度高、不开裂、不泛碱,以及透气防水和颜色鲜艳等特点,非常适合建筑物内外墙的装饰,尤其是别墅的装修。(The invention provides a preparation method of polymer color facing mortar, which comprises the following components in parts by weight: 75-90 parts of aluminate cement, 15-25 parts of gypsum, 5-10 parts of nano silicon dioxide, 10-15 parts of heavy calcium powder, 250-350 parts of sand and 5-8 parts of latexPowder, 2-4 parts of pigment, 0.2-0.6 part of cellulose ether, 0.1-0.3 part of defoaming agent, 10-15 parts of emulsion and 60-70 parts of water. The invention selects aluminate cement as the main cementing material, fundamentally avoids soluble salt Ca (OH) 2 The addition of the emulsion has a hydrophobic effect, can reduce the migration of soluble salt in the facing mortar, and has a strong inhibiting effect on the efflorescence of the facing mortar; the invention can realize the inhibition of the efflorescence of the facing mortar, has various performances meeting the standard of the facing mortar, has the characteristics of high strength, no cracking, no efflorescence, air permeability, water resistance, bright color and the like, and is very suitable for the decoration of the inner and outer walls of buildings, in particular the decoration of villas.)

1. The preparation method of the polymer color facing mortar is characterized in that the raw materials are as follows according to the mass portion:

aluminate cement to be released and/or released;

(iii) gypsum and/or other & ageing, and/or (iv) 15-25;

and/or 4 and/or 6 and/or 15;

nanosilica is/and/or is/are less than/equal to 5/10;

(iii) quartz sand to be released and/or earthed (250-350);

and/or 4 and/or 5 and/or 8;

and/or colouring and/or ageing/and/or ageing/of the colour/or/colour/or/colour/or/colour/or/colour;

cellulose ether to be 5.6 and/or 4.2 to 5.6;

and the defoaming agent is to be released and/or earthed and/or to be released and/or to be released and/to and/or to be released and/or to 0.1 and/or to 0.0.3;

(iii) emulsion and/or design/release and/or release/release and/or release/and/or release/and/or/and/or release and/or release/and/or release and/or release and/or release/or release/or/and/or release and/or/and/or/and/or/and/or/and/or;

and water and/or circuitry/and/or circuitry/and/or circuitry/and/or circuitry/and/or circuitry/and/or circuitry/and/or circuitry/and/or/and/or circuitry/or/and/or circuitry/or circuitry/and/or/and/or/and/or circuitry/and/or/and/or/and/or/and/or/and/or/and/or/.

2. The method of preparing a polymeric color finishing mortar of claim 1, wherein: in the aluminate cement, Al₂O₃The content of (A) is 65% or more.

3. The method of preparing a polymeric color finishing mortar of claim 1, wherein: the gypsum is beta-hemihydrate gypsum.

4. The method of preparing a polymeric color finishing mortar of claim 1, wherein: the particle size of the nano silicon dioxide is 50-100 nm.

5. The method of preparing a polymeric color finishing mortar of claim 1, wherein: the fineness of the heavy calcium powder is more than 500 meshes, and the content of calcium carbonate is more than 96%.

6. The method of preparing a polymeric color finishing mortar of claim 1, wherein: the particle size and the proportion of the quartz sand are as follows: 20-50 meshes: 80-120 mesh ═ 3: 1.

7. the method of preparing a polymeric color finishing mortar of claim 1, wherein: the latex powder is redispersible latex powder, and specifically is one or more of ethylene-vinyl acetate copolymer latex powder, vinyl acetate-vinyl versatate copolymer latex powder, and vinyl acetate-ethylene and higher fatty acid vinyl ester terpolymer rubber powder.

8. The method of preparing a polymeric color finishing mortar of claim 1, wherein: the pigment is one or two of inorganic pigment and organic pigment.

9. The method of preparing a polymeric color finishing mortar of claim 1, wherein: the cellulose ether is hydroxypropyl methyl cellulose ether or hydroxyethyl methyl cellulose ether, and the viscosity of the cellulose ether is 10000-50000 mPa & s.

10. The method of preparing a polymeric color finishing mortar of claim 1, wherein: the defoaming agent is an organic silicon defoaming agent; the emulsion is formed by compounding styrene-butadiene emulsion and silane coupling agent, and the proportion of the emulsion is 5: 2-6: 1; the water is ordinary tap water.

Technical Field

The invention relates to the field of building decoration materials, in particular to a preparation method of polymer color facing mortar.

Background

The facing mortar is a general name of wall plastering with decorative effect, and is composed of inorganic cementing material, organic cementing material, aggregate and various additives, and is a novel wall decoration material. On one hand, the facing mortar is used as an inorganic decorative material, compared with the organic coating on the market, the facing mortar has better matching property and compatibility with a wall heat-insulating system, has good durability, and has more sustainable development than the organic coating from the aspects of cost and environmental protection. On the other hand, the thickness of the facing mortar painting is thinner and only 1-3 mm, and compared with the ceramic tile, the facing mortar painting has the advantages of light weight, reduction of the load of a wall heat insulation system and the like, and particularly can reduce the risk coefficient of falling of the ceramic tile caused by overload when the facing mortar painting is applied to surface decoration of high-rise buildings. However, the traditional facing mortar mainly uses portland cement as a cementing material, and the appearance of facing mortar decoration is seriously affected by the efflorescence phenomenon on the surface of the traditional facing mortar, so that the traditional facing mortar cannot be comprehensively popularized. Efflorescence is one of the more common and difficult to avoid problems with cement-based materials, particularly with portland cement-based materials. The reason is that the Portland cement forms a large amount of Ca (OH) in the hydration process₂And Ca (OH)₂Can be dissolved in water to form free Ca²⁺Under the action of external environment and temperature, a large amount of Ca can be carried by the water in the mortar²⁺Ca flowing to the surface of mortar to reach the surface of mortar²⁺With evaporation of water and CO in the air₂React to form CaCO₃And depositing on the surface to form white substance. In addition, the small amount of alkali oxide in the silicate cement can be dissolved in the mixing water in the system to form more free Na⁺、K⁺Etc. these alkali ions react with CaSO in the cement₄The reaction generates soluble sulfate which migrates to the surface of the mortar along with the evaporation of water to form white precipitate. Thus, it can be seen that the problem of efflorescence in finishing mortars is a challenging and urgent problem to solve.

The patent of publication No. CN 104045307A discloses a facing mortar and a preparation method thereof, wherein the facing mortar is prepared from the following raw materials in parts by weight: 40-80 parts of aluminate cement, 1-30 parts of silicate cement, 20-30 parts of semi-hydrated gypsum, 350-400 parts of quartz sand, 4-12 parts of emulsion powder, 0.1-0.5 part of cellulose 0.1, 0.01-0.5 part of retarder, 1-9 parts of pigment and 75-90 parts of water; wherein the sum of the aluminate cement, the silicate cement and the semi-hydrated gypsum is 100 parts. Although the facing mortar of the invention is not easy to be efflorescent, has good stain resistance, high bonding strength, durable color and luster and good waterproof and air permeability, new efflorescence phenomenon can occur at the later stage due to the system structure, the system strength can be reversely shrunk by carbonizing more ettringite and crystal transformation at the later stage, and white calcium carbonate can be formed by carbonizing.

The invention takes aluminate cement to replace the traditional portland cement as the main cementing material of the facing mortar, thus fundamentally avoiding soluble salt Ca (OH)₂The emulsion can form a three-dimensional latticed film layer to be attached to the surface of a hydration product in the hardening process of the facing mortar, so that the effects of water resistance and air permeability are achieved, and the practicability of the facing mortar is improved while the efflorescence is inhibited.

Disclosure of Invention

The invention aims to provide a preparation method of polymer color facing mortar, which solves the problem that the facing mortar is easy to cause saltpetering. Its all performance all accord with the facing mortar standard, and have high, do not crack, do not saltpeter, and ventilative waterproof and bright-colored characteristics such as the color, be particularly suitable for the decoration of building interior and exterior wall, especially the decoration of villa.

In order to achieve the purpose, the technical scheme of the invention is as follows:

the preparation method of the polymer color facing mortar is characterized in that the raw materials are as follows according to the mass portion:

the content of Al2O3 in the aluminate cement is more than 65 percent.

The gypsum is beta-hemihydrate gypsum.

The particle size of the nano silicon dioxide is 50-100 nm.

The fineness of the heavy calcium powder is more than 500 meshes, and the content of calcium carbonate is more than 96%.

The particle size and the proportion of the quartz sand are as follows: 20-50 meshes: 80-120 mesh ═ 3: 1.

the latex powder is redispersible latex powder, and specifically is one or more of ethylene-vinyl acetate copolymer latex powder, vinyl acetate-vinyl versatate copolymer latex powder, and vinyl acetate-ethylene and higher fatty acid vinyl ester terpolymer rubber powder.

The pigment is one or two of inorganic pigment and organic pigment.

The cellulose ether is hydroxypropyl methyl cellulose ether or hydroxyethyl methyl cellulose ether, and the viscosity of the cellulose ether is 10000-50000 mPa & s.

The defoaming agent is an organic silicon defoaming agent; the emulsion is formed by compounding styrene-butadiene emulsion and silane coupling agent, and the proportion of the emulsion is 5: 2-6: 1; the water is ordinary tap water.

Compared with the prior art, the invention has the following advantages and beneficial effects:

the invention adopts the mutual matching of the aluminate cement, the triple superphosphate powder, the nano silicon dioxide and the gypsum, is beneficial to reducing the generation of soluble salt, improving the contractibility of the aluminate cement and avoiding the problems of later strength shrinkage, cracks and the like of the facing mortar. In the quartz sand matching, sands with different grain diameters are adopted for grading, so that the phenomenon of sand pits on the surface of facing mortar is avoided, and the construction effect and the decoration effect can be improved. And the emulsion can form a three-dimensional latticed film layer to be attached to the surface of a hydration product in the hardening process of the facing mortar, so that the effects of water resistance and air permeability are achieved, and the aim of finally inhibiting the facing mortar from efflorescence is fulfilled.

The prepared facing mortar has various performances meeting the facing mortar standard, has the characteristics of high strength, no cracking, no saltpetering, air permeability, water resistance, bright color and the like, and is very suitable for decoration of inner and outer walls of buildings, especially villa decoration.

Drawings

FIG. 1 is a schematic representation of primary saltpetering (A) and secondary saltpetering (B) of a finishing mortar of example 1.

FIG. 2 is a schematic representation of the primary (A1) and secondary (B1) efflorescence of the finishing mortar of example 2.

FIG. 3 is a schematic representation of primary saltpetering (C) and secondary saltpetering (D) of the finishing mortar of comparative example 1.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work based on the embodiments of the present invention belong to the scope of the present invention.

Example 1

The preparation method of the polymer color facing mortar is characterized in that the raw materials are as follows according to the mass portion:

the implementation steps are as follows:

(1) weighing the material components in parts by weight, uniformly mixing dry powders, adding the emulsion into water, and uniformly mixing;

(2) and (3) sequentially adding the mixed materials and water into a stirrer for stirring, wherein the stirring time is 3-5 min, the stirring is stopped for 60s, mortar attached to the wall of the stirrer is scraped during the stirring stopping period, and a finished product is obtained after the stirring is finished.

Example 2

The preparation method of the polymer color facing mortar is characterized in that the raw materials are as follows according to the mass portion:

the implementation steps are as follows:

(1) weighing the material components in parts by weight, uniformly mixing dry powders, adding the emulsion into water, and uniformly mixing;

(2) and (3) sequentially adding the mixed materials and water into a stirrer for stirring, wherein the stirring time is 3-5 min, the stirring is stopped for 60s, mortar attached to the wall of the stirrer is scraped during the stirring stopping period, and a finished product is obtained after the stirring is finished.

Comparative example 1

The raw materials used for the polymer color facing mortar of the comparative example are consistent with those of example 1 except for the emulsion, and the raw materials are as follows according to the mass ratio:

the preparation method of the polymer color facing mortar is characterized in that the raw materials are as follows according to the mass portion:

the implementation steps are as follows:

(1) weighing the material components in parts by weight, and uniformly mixing dry powders;

(2) and (3) sequentially adding the mixed materials and water into a stirrer for stirring, wherein the stirring time is 3-5 min, the stirring is stopped for 60s, mortar attached to the wall of the stirrer is scraped during the stirring stopping period, and a finished product is obtained after the stirring is finished.

The properties of the polymer modified aluminate cement-based facing mortar prepared in example 1 were characterized and tested according to the JCT 1024-2019 standard for wall facing mortar, and the results are shown in table 1 in comparison with the wall facing mortar standard, from which it can be seen that the properties of the polymer modified aluminate cement-based facing mortar meet the standards, even are higher than the standards, especially the mechanical properties.

And fig. 1, 2 and 3 are photographs of surface whiskering of the facing mortar of example 1, example 2 and comparative example 1, respectively, and comparison in the figures shows that the facing mortar prepared by the invention can meet national standards in practical application, and neither primary whiskering nor secondary whiskering occurs, so that the facing mortar prepared by the invention can effectively solve the whiskering problem in the using process, and has important significance and guidance for the application of the facing mortar in life in the future.

Table 1 example 1 properties of the finishing mortar

Note: the performance test methods in table 1 refer to JCT 1024-2019 wall facing mortar standard.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the preferred embodiments of the invention and described in the specification are only preferred embodiments of the invention and are not intended to limit the invention, and that various changes and modifications may be made without departing from the novel spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.