CN110885226B - Colored gypsum plastering mortar and preparation method thereof - Google Patents

Abstract

The invention discloses colored gypsum plastering mortar and a preparation method thereof, wherein the colored gypsum plastering mortar comprises the following components in parts by weight: 40-50 parts of desulfurized gypsum, 35-45 parts of white sand, 5-10 parts of heavy calcium carbonate, 1-2 parts of latex powder, 0.1-0.5 part of retarder, 0.1-0.3 part of water-retaining agent, 0.3-0.5 part of colorant and 2-5 parts of inorganic pigment. The product prepared by the invention has high strength and can replace a veneer layer; labor and material are saved, the environment is protected, no pollution is caused, and a good texture three-dimensional decoration effect is achieved. The product is mainly used for leveling the rough and uneven cement mortar wall surface or concrete wall surface of the inner wall and can also be directly used as the decorative surface of the inner wall.

Description

Colored gypsum plastering mortar and preparation method thereof

Technical Field

The invention relates to the technical field of gypsum plastering mortar, in particular to colored gypsum plastering mortar and a preparation method thereof.

Background

At present, the newly increased building area is nearly 20 hundred million square meters every year in China, which approximately needs 5 hundred million tons of inner wall plastering mortar, and approximately consumes 1.5 hundred million tons of cement; if the desulfurized gypsum high-strength cementing material is used for replacing cement, the emission of billions of tons of CO2 can be reduced, nearly ten million tons of standard coal can be saved, and 0.8 million tons of desulfurized gypsum is changed into valuable.

In modern building engineering, plastering gypsum is mainly used for replacing plastering materials such as cement, lime mortar, clay mortar and the like, and is suitable for various walls. Compared with other plastering mortars, the plastering gypsum has good workability, fluidity and water retention property, good heat preservation, heat insulation and sound insulation properties, proper fireproof performance, compact and flat wall surface, can be bonded with any base material, can adjust the indoor humidity, is not limited by thickness, is a wall plastering leveling material with good material performance, construction performance and use function, and is widely applied to industrial and civil buildings.

For example, the prior patent document CN108947371A discloses a polymer thin layer crack-resistant plastering mortar, which comprises 150-200 parts of cement; 30-50 parts of heavy calcium powder; 600 portions and 750 portions of fine sand; 8-15 parts of redispersible latex powder; 1-3 parts of cellulose ether; 1-3 parts of retarder; 1-2 parts of fiber; 10-30 parts of polyacrylate emulsion.

However, the existing gypsum plastering mortar on the market has single color and can only be used as a base leveling layer generally.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide the colored gypsum plastering mortar and the preparation method thereof, which solve the decorative effect of the plaster plastering mortar veneer and replace the use of paint.

The color gypsum plastering mortar has high strength and good bonding property, can greatly shorten the final setting time and the maintenance time by early strengthening, can lead the next procedure to enter the field in advance, and can obviously shorten the interval period of the construction of the leveling layer and the decorative layer. Therefore, considerable time and cost are saved for an owner and a total package, particularly for a project with a shorter construction period, the finished plaster surface has good appearance, the hollowing and cracking phenomenon can be effectively controlled, the resource waste is reduced, the vertical leveling of the finished surface is easy to control, the finished surface can be repaired and created, the maintenance is convenient, the material is green and environment-friendly, the material can be recycled, the material can be used along with stirring, the construction environment is good, and the waste is less.

The product is suitable for leveling and plastering various indoor wall surfaces, such as red brick walls, aerated concrete block walls, gypsum block wall surfaces and the like.

The purpose of the invention is realized by the following technical scheme:

the invention provides color gypsum plastering mortar which is characterized by comprising the following components in parts by weight: 40-50 parts of desulfurized gypsum, 35-45 parts of white sand, 5-10 parts of heavy calcium carbonate, 1-2 parts of latex powder, 0.1-0.5 part of retarder, 0.1-0.3 part of water-retaining agent, 0.3-0.5 part of colorant and 2-5 parts of inorganic pigment.

Preferably, the desulfurized gypsum is semi-hydrated gypsum which is calcined from waste residue generated after the flue gas of the power plant is desulfurized; the average grain diameter of the desulfurized gypsum is 0.025-0.055 mm.

Preferably, the fineness of the white sand is 50-100 meshes.

Preferably, the fineness of the coarse whiting is 150-200 meshes.

Preferably, the latex powder is saponification-resistant redispersible vinyl acetate/ethylene copolymer rubber powder selected from Taiwan Dalian chemical, and the model is DA 1220.

Preferably, the retarder is a polymer protein retarder and is selected from QS-H2011 which is produced by Shanghai Shuicho industries, Ltd.

Preferably, the water-retaining agent is low-viscosity hydroxypropyl methyl cellulose with the molecular weight of 2-4 ten thousand, so that the adhesive property can be improved, the water retention property of the material can be enhanced, and the tensile strength of the material can be improved.

Preferably, the colorant is rutile titanium dioxide, and the average particle size is 0.20-0.26 microns.

Preferably, the inorganic pigment is at least one of iron oxide red, iron oxide black or iron oxide yellow, and the iron oxide pigment has the characteristics of no toxicity, no bleeding, low cost and capability of forming various different color tones.

The invention also provides a preparation method of the colored gypsum plastering mortar, which comprises the following steps:

and dry-mixing and stirring the desulfurized gypsum, the white sand, the coarse whiting, the latex powder, the retarder, the water-retaining agent, the colorant and the inorganic pigment, and uniformly mixing to obtain the colored gypsum plastering mortar.

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

(1) the coating surface structural layer of the general gypsum plastering mortar comprises a concrete wall or a masonry wall foundation wall, the gypsum plastering mortar, a putty leveling layer, a bottom coating and a finishing coat; the colored gypsum plastering mortar structure comprises a concrete wall or a masonry wall foundation wall and a colored gypsum plastering mortar layer. Therefore, the color gypsum plastering mortar is used for replacing the traditional gypsum plastering mortar, so that a putty leveling layer, a bottom coating and a finishing coat can be omitted, and the labor and the materials are saved.

(2) The effective amount of each inorganic pigment and colorant increases the individual selection of users and enhances the decorative effect of buildings.

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.

Examples 1 to 5

Embodiments 1 to 5 relate to a colored gypsum plastering mortar and a preparation method thereof, and the components and the amounts thereof of the colored gypsum plastering mortar are shown in table 1.

The desulfurized gypsum is semi-hydrated gypsum which is prepared by calcining waste residues generated after flue gas desulfurization of a power plant; the average grain diameter of the desulfurized gypsum is 0.025-0.055 mm.

The fineness of the white sand is 50-100 meshes.

The fineness of the coarse whiting is 150-200 meshes.

The latex powder is anti-saponification redispersible vinyl acetate/ethylene copolymer rubber powder selected from Taiwan Dalian chemical, and the model is DA 1220.

The retarder is a polymer protein retarder and is produced by Shanghai Shuicho industries Co., Ltd, and the model is QS-H2011.

The water-retaining agent is low-viscosity hydroxypropyl methyl cellulose with the molecular weight of 2-4 ten thousand.

The colorant is rutile titanium dioxide, and the average particle size is 0.20-0.26 micron.

The inorganic pigment is iron oxide red or iron oxide black or iron oxide yellow, and the inorganic pigment is prepared according to color requirements.

The preparation method comprises the following steps: and dry-mixing and stirring the desulfurized gypsum, the white sand, the heavy calcium, the latex powder, the retarder, the water-retaining agent, the colorant and the inorganic pigment in parts by mass, and uniformly mixing to obtain the colored gypsum plastering mortar.

Then according to the construction requirement, the water adding amount is between 30 and 40 percent, and water is added and stirred evenly to be in a slurry state for construction.

TABLE 1

Comparative example 1

The present comparative example relates to a novel high strength gypsum plastering mortar and a method for preparing the same, the components of which are substantially the same as those of example 2 except that: the comparative example uses a sodium citrate retarder instead of a high molecular protein retarder. The procedure of the preparation method was the same as in example 2.

Comparative example 2

The present comparative example relates to a colored gypsum plastering mortar and a preparation method thereof, the composition of which is substantially the same as that of example 2 except that: the comparative example did not have a water retaining agent added. The procedure of the preparation method was the same as in example 2.

Comparative example 3

The present comparative example relates to a novel high strength gypsum plastering mortar and a method for preparing the same, the components of which are substantially the same as those of example 2 except that: this comparative example uses yellow sand instead of white sand. The procedure of the preparation method was the same as in example 2.

Comparative example 4

The present comparative example relates to a novel high strength gypsum plastering mortar and a method for preparing the same, the components of the novel high strength gypsum plastering mortar are substantially the same as those of example 4, except that: this comparative example used 35 parts of desulfurized gypsum and 50 parts of white sand. The procedure of the preparation process was the same as in example 4.

Comparative example 5

The present comparative example relates to a novel high strength gypsum plastering mortar and a method for preparing the same, the components of which are substantially the same as those of example 5 except that: this comparative example used 55 parts of desulfurized gypsum and 30 parts of white sand. The procedure of the preparation process was the same as in example 5.

Comparative example 6

The present comparative example relates to a novel high strength gypsum plastering mortar and a method for preparing the same, the components of which are substantially the same as those of example 2 except that: this comparative example uses 0.7 parts of a colorant and 3.7 parts of an inorganic pigment. The procedure of the preparation method was the same as in example 2.

Comparative example 7

The present comparative example relates to a novel high strength gypsum plastering mortar and a method for preparing the same, the components of which are substantially the same as those of example 2 except that: the colorant of the present comparative example used anatase type titanium dioxide instead of rutile type titanium dioxide. The procedure of the preparation method was the same as in example 2.

Performance detection

The flexural strength, compressive strength, adhesive strength, water retention rate and the like of the colored gypsum plastering mortar prepared in each example and comparative example were measured by using relevant industrial standards and national standards, and the results are shown in table 2.

TABLE 2

As is clear from a comparison of example 2 with comparative example 6 in Table 2, the coloring power of the product cannot be significantly changed when the coloring agent of the present invention is added to a certain amount; from the comparison of example 2 with comparative example 7 in Table 2, it is understood that the rutile type titanium dioxide powder is stronger in coloring power than the anatase type titanium dioxide powder.

The invention has many applications, and the above description is only a preferred embodiment of the invention. It should be noted that the above examples are only for illustrating the present invention, and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications can be made without departing from the principles of the invention and these modifications are to be considered within the scope of the invention.

Claims (6)

1. The color gypsum plastering mortar is characterized by comprising the following components in parts by weight: 40-50 parts of desulfurized gypsum, 35-45 parts of white sand, 5-10 parts of heavy calcium carbonate, 1-2 parts of latex powder, 0.1-0.5 part of retarder, 0.1-0.3 part of water-retaining agent, 0.3-0.5 part of colorant and 2-5 parts of inorganic pigment;

the desulfurized gypsum is semi-hydrated gypsum which is prepared by calcining waste residues generated after flue gas desulfurization of a power plant; the average grain diameter of the desulfurized gypsum is 0.025-0.055 mm;

the fineness of the white sand is 50-100 meshes;

the colorant is rutile titanium dioxide, and the average particle size is 0.20-0.26 micron;

the inorganic pigment is at least one of iron oxide red, iron oxide black or iron oxide yellow.

2. The colored gypsum plastering mortar of claim 1, wherein the coarse whiting has a fineness of 150 to 200 meshes.

3. The colored gypsum plastering mortar of claim 1, wherein the latex powder is an anti-saponification redispersible vinyl acetate/ethylene copolymer rubber powder.

4. The colored gypsum plastering mortar of claim 1, wherein the retarder is a high molecular protein retarder.

5. The colored gypsum plastering mortar of claim 1, wherein the water retaining agent is low viscosity hydroxypropyl methylcellulose with a molecular weight of 2 to 4 ten thousand.

6. A method for preparing a coloured gypsum plastering mortar according to claim 1, which comprises the steps of:

and dry-mixing and stirring the desulfurized gypsum, the white sand, the coarse whiting, the latex powder, the retarder, the water-retaining agent, the colorant and the inorganic pigment, and uniformly mixing to obtain the colored gypsum plastering mortar.