阅读说明：本技术 一种图像水泥制品的制备方法 (Preparation method of image cement product ) 是由 周博儒 王军 赵日煦 高飞 熊龙 李兴 邢菊香 包明 余昆 于 2020-07-28 设计创作，主要内容包括：本发明公开了一种图像水泥制品的制备方法,包括以下步骤：将所需成像的图片用图像软件进行处理得到图案样式；利用打印机将油墨按照图案样式输出到打印介质上；将印有图案的打印介质放在干燥的环境中,表面晾干后,将其固定在图像水泥制品的成型模具里,印有图案的一侧向上；调整环境温湿度,向模具中有印有图案的一侧上浇筑水泥混合物,养护一定时间后拆模撕除打印介质。本发明针对现有技术存在的不足,提供一种成像效果好且成功率高的图像水泥制品的制备方法。(The invention discloses a preparation method of an image cement product, which comprises the following steps: processing the picture to be imaged by using image software to obtain a pattern style; outputting the ink to a printing medium according to a pattern by using a printer; placing the printing medium printed with the pattern in a dry environment, drying the surface of the printing medium, and fixing the printing medium in a forming mould of a cement product with the pattern printed upwards; adjusting the temperature and the humidity of the environment, pouring a cement mixture on one side of the mold with the printed pattern, curing for a certain time, and then removing the mold and the printing medium. Aiming at the defects in the prior art, the invention provides the preparation method of the image cement product with good imaging effect and high success rate.)

1. A method for preparing an image cement product is characterized by comprising the following steps:

1) processing the picture to be imaged by using image software to obtain a pattern style;

2) outputting the ink to a printing medium according to a pattern by using a printer;

3) placing the printing medium with the printed pattern in a dry environment, drying the surface of the printing medium, and fixing the printing medium in a forming mould of an image cement product, wherein the side printed with the pattern is upward;

4) adjusting the temperature and the humidity of the environment, pouring a cement mixture on one side of the mold with the printed pattern, curing for a certain time, and then removing the mold and the printing medium.

2. The method for preparing cement products with images as claimed in claim 1, wherein the ink is composed of 35 wt% of pigment, 10 wt% of shrinkage-reducing and adhesion-increasing type early strength agent and deionized water; the shrinkage-reducing and viscosity-increasing type early strength agent comprises the following components in parts by weight:

5-10 parts of aluminum sulfate, 3-5 parts of diethanolamine, 4-7 parts of citric acid, 0.5-1 part of phosphoric acid, 6-8 parts of a shrinkage and viscosity increasing component and 75-85 parts of deionized water; wherein, the structural formula of the shrinkage-reducing and viscosity-increasing component is as follows:

wherein m is a natural number of 360 to 1360; n is a natural number of 50 to 100; x is a natural number of 15-40; y is a natural number of 30 to 80; z is a natural number of 300 to 1200; r is-CH₃or-C₂H₅。

3. A method of making an imaged cementitious product as claimed in claim 2 wherein said shrinkage-reducing and viscosity-increasing component is made by:

1) acrylic acid and polyethylene glycol ether are used to generate an intermediate polyethylene glycol ether acrylate through esterification reaction under the combined action of p-toluenesulfonic acid and hydroquinone;

2) carrying out free radical polymerization reaction on the intermediate polyethylene glycol ether acrylate, methacrylate, acrylamide and methacrylamide under the action of ammonium persulfate;

3) and (4) dropwise adding a sodium hydroxide aqueous solution for neutralization to obtain the shrinkage-reducing and viscosity-increasing component.

4. A method of producing an imaged cementitious product as claimed in claim 2 wherein the shrinkage-reducing adhesion-promoting early strength agent is produced by:

heating deionized water to 70-85 ℃, adding aluminum sulfate octadecahydrate, stirring and dissolving completely; cooling to below 55 deg.C, adding shrinkage reducing and viscosity increasing components, stirring, and mixing; adding diethanolamine and citric acid, stirring, dissolving and mixing uniformly; adding phosphoric acid to adjust the pH value to 5-6 to obtain the shrinkage-reducing and viscosity-increasing type early strength agent.

5. The method of claim 1, wherein the printing medium is one of waterproof PP paper, weak solvent PP paper, PVC paper, waterproof nonwoven fabric, and photo paper.

6. The method for preparing an image cement product as claimed in claim 1, wherein the surface drying time in step 3 is 6-8 h.

7. The method for producing a cement product having an image according to claim 1, wherein in the step 4, the ambient temperature is adjusted to 25 ℃ to 27 ℃; the relative humidity is 70-90%.

8. A method for preparing a graphic cement product as claimed in claim 1, wherein said cement mixture of step 4 is cement paste, cement mortar or concrete.

9. The method for preparing cement products with images as claimed in claim 8, wherein the cement mortar comprises cement, river sand, additives and water, and the mass ratio of the cement mortar is as follows: river sand: water: the additive is 2000:1000, (590-610) and 40;

the cement is ordinary portland cement P.O 425; the fineness modulus of the river sand is 0.8; the additive is obtained by compounding water-reducing additive mother liquor, slump-retaining additive mother liquor and deionized water, wherein the water-reducing additive mother liquor is as follows: slump-retaining additive mother liquor: deionized water 7:3: 40.

10. The method for preparing cement products with images according to claim 1, wherein in the step 4, the time for removing the mold and the printing medium is 10-16 h after pouring.

Technical Field

The invention belongs to the technical field of building materials, and particularly relates to a preparation method of an image cement product.

Background

Concrete is a general term for engineering composite materials in which aggregate is cemented into a whole by a cementing material. The term concrete generally refers to cement concrete which is obtained by mixing cement as a cementing material, sand and stone as aggregates, water and an additive according to a certain proportion and stirring, and is also called ordinary concrete, and is generally used in the field of building engineering. However, with the progress of modern society and the improvement of people's living standard, people have not only satisfied their practicability but also have artistic quality, which is reflected in the field of building industry, that is, higher requirements are put forward for the decoration of building facades and the beautification of environment, and image cement products are also appeared on the market, and the image cement products form images on the surface of cement mixtures by using the plasticity and the solidification characteristics of the cement mixtures through media such as molds, imaging films and the like.

However, the thickness of the image cement product on the market is generally much smaller than the length and the width of the image cement product, so that the surface of the image cement product is easy to crack, and particularly, the strength of the image cement product is developed at a higher speed and is easy to crack at the position where the image cement product has the function of an early strength agent, so that the final imaging effect of the image cement product is influenced. Meanwhile, in order to ensure the convenience of preparing the image cement product and the integrity of an imaging picture, a cement mixture with a large fluidity is often prepared to prepare the image cement product, so that the functional agent on the surface of the printing medium is washed to other positions, and the final imaging effect of the image cement product is also influenced.

Disclosure of Invention

The invention aims to provide a preparation method of an image cement product with good imaging effect and high success rate aiming at the defects in the prior art.

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

a method of making an imaged cementitious article comprising the steps of:

1) processing the picture to be imaged by using image software to obtain a pattern style;

2) outputting the ink to a printing medium according to a pattern by using a printer;

3) placing the printing medium with the printed pattern in a dry environment, drying the surface of the printing medium, and fixing the printing medium in a forming mould of an image cement product, wherein the side printed with the pattern is upward;

4) adjusting the temperature and the humidity of the environment, pouring a cement mixture on one side of the mold with the printed pattern, curing for a certain time, and then removing the mold and the printing medium.

According to the scheme, the ink consists of 35 wt% of pigment, 10 wt% of shrinkage-reducing and viscosity-increasing type early strength agent and deionized water; the shrinkage-reducing and viscosity-increasing type early strength agent comprises the following components in parts by weight:

5-10 parts of aluminum sulfate, 3-5 parts of diethanolamine, 4-7 parts of citric acid, 0.5-1 part of phosphoric acid, 6-8 parts of a shrinkage and viscosity increasing component and 75-85 parts of deionized water; wherein, the structural formula of the shrinkage-reducing and viscosity-increasing component is as follows:

wherein m is a natural number of 360 to 1360; n is a natural number of 50 to 100; x is a natural number of 15-40; y is a natural number of 30 to 80; z is a natural number of 300 to 1200; r is-CH 3 or-C2H 5.

According to the scheme, the shrinkage-reducing and viscosity-increasing component is prepared in the following way:

1) acrylic acid and polyethylene glycol ether are used to generate an intermediate polyethylene glycol ether acrylate through esterification reaction under the combined action of p-toluenesulfonic acid and hydroquinone;

2) carrying out free radical polymerization reaction on the intermediate polyethylene glycol ether acrylate, methacrylate, acrylamide and methacrylamide under the action of ammonium persulfate;

3) and (4) dropwise adding a sodium hydroxide aqueous solution for neutralization to obtain the shrinkage-reducing and viscosity-increasing component.

According to the scheme, the shrinkage-reducing and viscosity-increasing type early strength agent is prepared in the following mode:

heating deionized water to 70-85 ℃, adding aluminum sulfate octadecahydrate, stirring and dissolving completely; cooling to below 55 deg.C, adding shrinkage reducing and viscosity increasing components, stirring, and mixing; adding diethanolamine and citric acid, stirring, dissolving and mixing uniformly; adding phosphoric acid to adjust the pH value to 5-6 to obtain the shrinkage-reducing and viscosity-increasing type early strength agent.

According to the scheme, the forming mold is a plastic mold, a glass mold, a wood mold, a steel mold, an aluminum mold or a foam mold, and preferably a foam mold.

According to the scheme, the printing medium is one of waterproof PP paper, weak solvent PP paper, PVC paper, waterproof non-woven fabric and photographic paper; waterproof PP paper is preferred.

According to the scheme, the surface drying time in the step 3 is 6-8 hours.

According to the scheme, the environmental temperature is adjusted to be 25-27 ℃ in the step 4; the relative humidity is 70-90%.

According to the scheme, the cement mixture in the step 4 is cement paste, cement mortar or concrete; cement mortar is preferred.

According to the scheme, the cement mortar comprises cement, river sand, an additive and water, and the mass ratio of the cement mortar is as follows: river sand: water: the additive is 2000:1000, (590-610) and 40;

the cement is ordinary portland cement P.O425; the fineness modulus of the river sand is 0.8; the additive is obtained by compounding water-reducing additive mother liquor, slump-retaining additive mother liquor and deionized water, wherein the water-reducing additive mother liquor is as follows: slump-retaining additive mother liquor: deionized water 7:3: 40.

According to the scheme, the time for removing the mold and the printing medium in the step 4 is 10-16 hours after pouring.

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

(1) the ink used in the invention is added with the shrinkage-reducing and viscosity-increasing type early strength agent, wherein the polyoxyethylene group of the shrinkage-reducing and viscosity-increasing component forms a strong hydrogen bond with water molecules through an ether bond, and the water molecules are firmly adsorbed on the molecules of the ink, so that on one hand, the reaction of the early strength agent and cement clinker can be ensured to be more thorough, the final imaging chromatic aberration of an image cement product is larger, and the imaging effect is more obvious; on the other hand, the method can prevent the volatilization of water, reduce the shrinkage of the cement product with the image, and avoid the occurrence of cracks to influence the final imaging effect.

(2) The ink used in the invention is added with the shrinkage-reducing and viscosity-increasing type early strength agent, wherein the polyacrylamide group of the shrinkage-reducing and viscosity-increasing component has the bridging effect and the charge effect of an anionic group, and the particle effect and the surface activity effect of the shrinkage-reducing and viscosity-increasing type early strength agent can increase the viscosity of the shrinkage-reducing and viscosity-increasing type early strength agent solution, thereby improving the adhesive force of the shrinkage-reducing and viscosity-increasing type early strength agent on the surface of a pigment molecule, and avoiding the shrinkage-reducing and viscosity-increasing type early strength agent from being randomly distributed on the surface of a printing medium to influence the final imaging effect of an.

Detailed Description

In order to better understand the present invention, the following examples are further described, but the present invention is not limited to the scope of the examples.