Production method of cement-based self-leveling coating

Abstract

The invention discloses a production method of a cement-based self-leveling coating and belongs to the technical field of self-leveling paints.The cement-based self-leveling coating is prepared from epoxy resin emulsion and self-leveling cement and overcomes the defects that a self-leveling cement floor is poor in decoration performance and an epoxy self-leveling floor is prone to blistering and high in manufacturing cost. Meanwhile, various excellent performances of cement self-flowing and epoxy resin are reserved, and the anticorrosive waterproof coating has excellent anticorrosive waterproof performance. In chemical plants, petroleum factories, wharfs and other highly corrosive environments, common repairing mortar is often difficult to effectively protect concrete, but the epoxy resin emulsion and the self-leveling cement are blended to resist the erosion of chemical substances, provide lasting protection for the concrete, and can be tightly combined with the concrete to form a firm whole, so that the repairing mortar has a good repairing effect on the concrete. And the bearing capacity and durability of the repaired part are effectively improved.

Description

Technical Field

[0001] The invention belongs to the technical field of self-leveling coatings, in particular to a production method of cement-based self-leveling coatings. Background Art

[0002] The widely used cement-based self-leveling materials and sand-containing gypsum-based self-leveling materials have the disadvantages of low fluidity, large volume, and difficulty in pumping construction, and are no longer suitable for the rapidly developing construction industry. Therefore, silicate cement-based self-leveling mortar has the disadvantages of low early strength. However, the current cement-based self-leveling mortar materials have the disadvantages of low strength, poor performance coordination, high cost, high energy consumption and carbon emissions, which to a certain extent limit its use. Those skilled in the art are in urgent need of developing a production method for cement-based self-leveling coatings to meet existing usage needs and performance requirements. Summary of the invention

[0003] In view of the above problems, the present invention aims to provide a method for producing a cement-based self-leveling coating.

[0004] The present invention is achieved through the following technical solutions: A production method of cement-based self-leveling paint comprises the following steps: 1. Mixing cement, slag powder, coal gangue powder, desulfurized gypsum powder and quartz sand uniformly in advance; 2. Wetting a cement mortar mixer, adding powder and starting slow stirring, while adding a test water amount uniformly into the mixer and maintaining slow stirring, adding a retarder, a resin emulsion, a water reducing agent, a defoaming agent and water during the process, and continuing stirring for 1.5 to 2 minutes at a water-cement ratio of 0.23 to 0.25 to obtain a uniform cement-based self-leveling mortar.

[0005] Furthermore, the slag powder in step 1 is S95 granulated blast furnace slag powder.

[0006] Furthermore, the cement in step 1 is P·O42.5 grade self-leveling cement.

[0007] Furthermore, the quartz sand in step 1 is quartz sand with a particle size of 0.125~0.210mm.

[0008] Furthermore, the water reducing agent in step 2 is a polycarboxylic acid water reducing agent.

[0009] Furthermore, the retarder in step 2 is tartaric acid.

[0010] Furthermore, the resin emulsion in step 2 is epoxy resin emulsion.

[0011] Furthermore, the defoaming agent in step 2 is an organosilicon defoaming agent.

[0012] Furthermore, in parts by weight, the ingredients include 330-340 parts of cement, 25-30 parts of gypsum, 25-30 parts of slag powder, 25-30 parts of coal gangue powder, 500-570 parts of quartz sand, 0.3-0.35 parts of water reducer, 0.03-0.05 parts of defoamer, 0.6-0.8 parts of retarder, and 40-45 parts of resin emulsion.

[0013] Compared with the prior art, the present invention has the following advantages: The production method of cement-based self-leveling coating disclosed in the present invention is prepared by epoxy resin emulsion and self-leveling cement, which overcomes the shortcomings of poor decorativeness of self-leveling cement floor, easy bubbling and high cost of epoxy self-leveling floor, and retains many excellent properties of cement self-leveling and epoxy resin, and has excellent anti-corrosion and waterproof properties. In highly corrosive environments such as chemical plants, oil plants, and docks, ordinary repair mortar is often difficult to effectively protect concrete, while epoxy resin emulsion and self-leveling cement blending can resist the erosion of chemical substances, provide lasting protection for concrete, and can be tightly combined with concrete to form a solid whole, effectively improving the bearing capacity and durability of the repaired part. DETAILED DESCRIPTION

[0014] The present invention is described below with specific examples, but is not intended to be limiting of the present invention. Example 1

[0015] Raw materials: Jurong Guanghua Building Materials P·O42.5 self-leveling white cement; Shandong Linyi self-leveling cement; slag powder is S95 granulated blast furnace slag powder; quartz sand with a particle size of 0.125~0.210mm; Huaxuan KH-2 polycarboxylic acid water reducer; Lanxi Shengda tartaric acid; Yunmeng Borui BH-WEP-1050 E44 epoxy resin emulsion with a solid content of 50%; Wobei 325 mesh coal gangue powder; silicone defoamer EVANO680.

[0016] A method for producing a cement-based self-leveling coating comprises the following steps: (1) pre-mixing cement, slag powder, coal gangue powder, desulfurized gypsum powder and quartz sand; (2) wetting a cement mortar mixer, adding the powder and stirring slowly, while evenly adding the test water into the mixer and stirring slowly, adding a retarder, a resin emulsion, a water reducer, a defoamer and water, stirring for 1.5 minutes at a water-cement ratio of 0.23 to obtain a uniform cement-based self-leveling mortar. Prepare the materials by weight, including: 330 parts of cement, 25 parts of gypsum, 25 parts of slag powder, 25 parts of coal gangue powder, 500 parts of quartz sand, 0.3 parts of water reducer, 0.03 parts of defoamer, 0.6 parts of tartaric acid retarder and 40 parts of epoxy resin emulsion.

[0017] Product coating performance: uniform appearance, no agglomeration, initial fluidity 150mm, 20min fluidity 145mm, tensile bonding strength 1.6MPa, dimensional change rate -0.06%, impact resistance without cracking or detachment from the base plate, 24h compressive strength 12.5MPa, 24h flexural strength 3.56MPa, wear resistance 400mm 3 . Example 2

[0018] Raw materials: Linyi Luozhuang Linyi New Materials P·O42.5 self-leveling white cement; Xuzhou Kejian Environmental Protection S95 granulated blast furnace slag powder; quartz sand with a particle size of 0.125~0.210mm; Sika polycarboxylic acid water reducer 540P; Hangzhou Hongshan Chemical Plant tartaric acid; Lianyungang Liangdu Plant 45% solid content E51 epoxy resin emulsion; Wobei 325 mesh coal gangue powder; silicone defoamer XP22077.

[0019] A method for producing a cement-based self-leveling coating comprises the following steps: (1) pre-mixing cement, slag powder, coal gangue powder, desulfurized gypsum powder and quartz sand; (2) wetting a cement mortar mixer, adding the powder and stirring slowly, and at the same time, adding the test water evenly into the mixer and stirring slowly, adding a retarder, a resin emulsion, a water reducer, a defoamer and water during the process, and stirring for 2 minutes at a water-cement ratio of 0.25 to obtain a uniform cement-based self-leveling mortar. Prepare the materials by weight, including: 340 parts of cement, 30 parts of gypsum, 30 parts of slag powder, 30 parts of coal gangue powder, 570 parts of quartz sand, 0.35 parts of water reducer, 0.05 parts of defoamer, 0.8 parts of tartaric acid retarder and 45 parts of epoxy resin emulsion.

[0020] Product coating performance: uniform appearance, no agglomeration, initial fluidity 150mm, 20min fluidity 145mm, tensile bonding strength 1.6MPa, dimensional change rate -0.06%, impact resistance without cracking or detachment from the base plate, 24h compressive strength 12.5MPa, 24h flexural strength 3.56MPa, wear resistance 400mm 3 .

[0021] Note: Refer to JC / T 985-2017 Cement-based self-leveling mortar for floors.

Claims

1. A method for producing a cement-based self-leveling coating, characterized in that: The following steps are involved:

1. Mix cement, slag powder, coal gangue powder, desulfurized gypsum powder and quartz sand evenly in advance; 2. Moisten the cement mortar mixer, add the powder and start slow stirring. At the same time, add the test water evenly into the mixer and keep stirring slowly. During this period, add retarder, resin emulsion, water reducer, defoamer and water. Continue stirring for 1.5~2 minutes at a water-cement ratio of 0.23~0.25 to obtain a uniform cement-based self-leveling mortar.

2. The method for producing a cement-based self-leveling coating according to claim 1, characterized in that: The slag powder in step 1 is S95 granulated blast furnace slag powder.

3. The method for producing a cement-based self-leveling coating according to claim 1, characterized in that: The cement in step 1 is P·O42.5 grade self-leveling cement.

4. The method for producing a cement-based self-leveling coating according to claim 1, characterized in that: The quartz sand in step 1 is quartz sand with a particle size of 0.125-0.210 mm.

5. The method for producing a cement-based self-leveling coating according to claim 1, characterized in that: The water reducing agent in step 2 is a polycarboxylate water reducing agent.

6. The method for producing a cement-based self-leveling coating according to claim 1, characterized in that: The retarder in step 2 is tartaric acid.

7. The method for producing a cement-based self-leveling coating according to claim 1, characterized in that: The resin emulsion in step 2 is epoxy resin emulsion.

8. The method for producing a cement-based self-leveling coating according to claim 1, characterized in that: The defoaming agent in step 2 is an organosilicon defoaming agent.

9. The method for using the cement-based self-leveling coating obtained by the production method according to claim 1, characterized in that: The components, by weight, include 330-340 parts of cement, 25-30 parts of gypsum, 25-30 parts of slag powder, 25-30 parts of coal gangue powder, 500-570 parts of quartz sand, 0.3-0.35 parts of water reducing agent, 0.03-0.05 parts of defoaming agent, 0.6-0.8 parts of retarder, and 40-45 parts of resin emulsion.