Leveling method based on gypsum base ground material

Abstract

The invention discloses a leveling method based on a gypsum base ground material. The leveling method comprises the steps that S1, the leveling thickness is determined, specifically, the surface elevation is determined according to the preset floor after paving is completed; s2, brushing an interface agent: fully wetting the base floor, and brushing a water-based interface agent on the base floor; s3, a dry ground material layer is arranged, specifically, dry ground materials are taken and laid on the ground base layer, then prefabricated plates are laid, and knocking and compacting are conducted; s4, pouring partition plates are arranged, specifically, the construction width of one-time pouring is designed according to the construction thickness, two adjacent pouring partition plates are arranged according to the requirement of the construction width, and gaps between the partition plates and the ground are sealed with a stirred ground material; step S5, preparing a leveling material: uniformly mixing the raw materials of the leveling material to obtain a mixed material, adding water into the mixed material, and uniformly mixing to obtain leveling material slurry; and S6, pouring is conducted, specifically, a layer of leveling material slurry is evenly poured on the dry ground material layer, and a leveling material layer is obtained. And the leveling effect is good.

Description

Technical Field

[0001] The invention relates to the technical field of floor materials, and in particular to a leveling method based on gypsum-based floor materials. Background Art

[0002] Self-leveling floor materials are a new type of floor materials based on inorganic or organic cementitious materials, with various modified additives added, and used for self-leveling of the ground. Inorganic self-leveling floor materials are divided into two categories: cement-based and gypsum-based according to the base material. Gypsum-based self-leveling floor materials are usually based on α-semihydrated gypsum, β-semihydrated gypsum, natural anhydrous gypsum, etc., and are added with various related additives such as retarders, water reducers, water retention agents, etc. to prepare a kind of air-hardening self-leveling floor material. Gypsum-based self-leveling floor materials have the characteristics of high fluidity, long initial setting time, appropriate final setting time, high early and late strength, and high adhesion to the substrate. They can be widely used in indoor floor construction.

[0003] Existing gypsum-based self-leveling floor materials have poor water resistance and wear resistance, high cost, and complex leveling process. For example, the Chinese invention patent with authorization announcement number CN100390096C discloses a gypsum-based self-leveling floor leveling material for use in the field of construction engineering and its preparation method. The components and their weight percentages are: natural anhydrous gypsum 80-90%, cement 10-20%, salt activator 0.5-1.5%, water retaining agent 0.03-0.1%, water reducing agent 0.5-1.5%, defoaming agent 0.1-0.5%. Its preparation method: 1) Grind the natural hard gypsum with a ball mill, control the fineness to no more than 5% on a 200 mesh sieve, and the specific gravity to 4000-5000cm 2 / g. 2) Measure the cement, salt activator, water retaining agent, water reducing agent, defoaming agent and a small amount of gypsum powder in the above weight percentages and fully premix them. Fully mix the premixed powder with the remaining gypsum powder in a mixer to obtain a self-leveling floor screed material. For the sand-added formula, fine river sand can be added to the mixture as needed. The production process of the invention saves energy, reduces pollution, has a simple process, and reduces production costs. The product performance is better than that of ordinary gypsum-based self-leveling floor materials in terms of water resistance, high strength, and excellent applicability. However, its comprehensive performance, cost performance, and performance stability still need to be further improved, and the leveling process of the floor material is not disclosed. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a gypsum-based floor material and a leveling process thereof which has significant self-leveling effect, good water resistance and wear resistance, high strength and good performance stability.

[0006] To achieve the above object, the technical solution adopted by the present invention is: a leveling method based on gypsum-based floor material, comprising the following steps: Step S1, determining the leveling thickness: according to the preset surface elevation after the floor is laid, subtract the preset thickness of the floor to obtain the leveling thickness; Step S2, applying an interface agent: fully moisten the base floor, and apply a water-based interface agent on the base floor; Step S3, setting a dry ground material layer: taking dry ground material and laying it on the ground base, and then laying the prefabricated panels, tapping and compacting them so that the prefabricated panels are in a horizontal state, so that a compacted and flat dry ground material layer is formed under the prefabricated panels; Step S4, setting the pouring partition plate: designing the construction width of one pouring according to the construction thickness, setting two adjacent pouring partition plates according to the construction width requirement, and sealing the gap between the partition plate and the ground with the mixed ground material; Step S5, preparing the leveling material: uniformly mixing the raw materials of the leveling material to obtain a mixed material, and then adding water thereto and mixing uniformly to obtain a leveling material slurry; the dry floor material and the mixed material are made of the same material; Step S6, pouring: pour a layer of leveling material slurry evenly on the dry floor material layer to obtain a leveling material layer; lay prefabricated panels on the leveling material layer, tap and compact them to make the prefabricated panels in a horizontal state.

[0007] Optimally, in step S5, the mass ratio of the mixed material to water is 100:(25-35).

[0008] Optimally, in step S3, the dry floor material includes the following raw materials in parts by weight: 60-80 parts of desulfurized building gypsum, 5-12 parts of graphene, 5-10 parts of fly ash, 3-6 parts of cement, 1-2 parts of water reducer, 0.1-0.3 parts of defoamer, 1-3 parts of corn sugar residue, 0.2-0.5 parts of carboxymethyl cellulose and 0-20 parts of fine sand.

[0009] Furthermore, the desulfurized building gypsum is obtained by calcining flue gas desulfurized gypsum from a thermal power plant, wherein the content of β-hemihydrate gypsum is not less than 80%.

[0010] Furthermore, the graphene is graphene with product number HGP-50 provided by Qingdao Yanhai Carbon Materials Co., Ltd.

[0011] Furthermore, the particle size of the fly ash is 100-400 mesh.

[0012] Furthermore, the cement is ordinary Portland cement P·O42.5.

[0013] Furthermore, the water reducer is a polycarboxylic acid-based water reducer, such as the PC high-efficiency water reducer produced by Suzhou Xinlong Chemical Building Materials Co., Ltd.

[0014] Furthermore, the defoaming agent is organosilicon defoaming agent XPJ820.

[0015] Furthermore, the particle size of the fine sand is less than 0.1 mm.

[0016] Due to the application of the above technical scheme, the patent of the present invention has the following advantages compared with the prior art: the gypsum-based floor material provided by the present invention has significant self-leveling effect, good water resistance and wear resistance, high strength and good performance stability; at the same time, the present invention also discloses its leveling process, which is simple, easy to operate and has good leveling effect. DETAILED DESCRIPTION

[0017] The preferred embodiments of the present invention will be described in detail below.

[0018] A gypsum-based floor material with remarkable self-leveling effect, good water resistance and wear resistance, high strength and excellent performance stability and a leveling process thereof.

[0019] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a gypsum-based floor material (i.e., dry floor material), characterized in that it comprises the following raw materials in parts by weight: 60-80 parts of desulfurized building gypsum, 5-12 parts of graphene, 5-10 parts of fly ash, 3-6 parts of cement, 1-2 parts of water reducer, 0.1-0.3 parts of defoamer, 1-3 parts of corn sugar residue, 0.2-0.5 parts of carboxymethyl cellulose, and 0-20 parts of fine sand.

[0020] Preferably, the desulfurized building gypsum is obtained by calcining flue gas desulfurized gypsum from a thermal power plant, wherein the content of β-hemihydrate gypsum is not less than 80%.

[0021] Preferably, the graphene is graphene with product number HGP-50 provided by Qingdao Yanhai Carbon Materials Co., Ltd.

[0022] Preferably, the particle size of the fly ash is 100-400 mesh.

[0023] Preferably, the cement is ordinary Portland cement P·O42.5.

[0024] Preferably, the water reducer is a polycarboxylic acid-based water reducer, such as the PC high-efficiency water reducer produced by Suzhou Xinlong Chemical Building Materials Co., Ltd.

[0025] Preferably, the defoamer is organosilicon defoamer XPJ820.

[0026] Preferably, the particle size of the fine sand is less than 0.1 mm.

[0027] Another object of the present invention is to provide a leveling process for the gypsum-based floor material, comprising the following steps: Step S1, determining the leveling thickness: according to the preset surface elevation after the floor is laid, subtract the preset thickness of the floor to obtain the leveling thickness; Step S2, applying an interface agent: fully moisten the base floor, and apply a water-based interface agent on the base floor; Step S3, setting a dry ground material layer: taking dry ground material and laying it on the ground base, and then laying the prefabricated panels, tapping and compacting them so that the prefabricated panels are in a horizontal state, so that a compacted and flat dry ground material layer is formed under the prefabricated panels; Step S4, setting the pouring partition plate: designing the construction width of one pouring according to the construction thickness, setting two adjacent pouring partition plates according to the construction width requirement, and sealing the gap between the partition plate and the ground with the mixed ground material; Step S5, preparing the leveling material: mixing the raw materials of the leveling material evenly to obtain a mixed material, and then adding water thereto, mixing evenly to obtain a leveling material slurry; Step S6, pouring: pour a layer of leveling material slurry evenly on the dry ground material layer to obtain a leveling material layer; lay the prefabricated board on the leveling material layer, tap and compact it to make the prefabricated board in a horizontal state.

[0028] Preferably, the mass ratio of the mixed material to water in step S5 is 100:(25-35).

[0029] The present invention will be further described below in conjunction with specific embodiments, but the protection scope of the present invention is not limited thereto: Example 1 This example provides a gypsum-based floor material and a leveling process thereof with significant self-leveling effect, good water resistance and wear resistance, high strength, and good performance stability.

[0030] A gypsum-based floor material comprises the following raw materials in parts by weight: 60 parts of desulfurized building gypsum, 5 parts of graphene, 5 parts of fly ash, 3 parts of cement, 1 part of water reducing agent, 0.1 part of defoaming agent, 1 part of corn sugar residue, 0.2 part of carboxymethyl cellulose, and 5 parts of fine sand (1 part in this example is 500 g).

[0031] The desulfurized building gypsum is obtained by calcining flue gas desulfurization gypsum from a thermal power plant, wherein the content of β-hemihydrate gypsum is not less than 80%; the graphene is graphene with a product number of HGP-50 provided by Qingdao Yanhai Carbon Materials Co., Ltd.; the particle size of the fly ash is 100 mesh; the cement is ordinary silicate cement P·O42.5; the water reducer is a polycarboxylic acid-based water reducer, such as the PC high-efficiency water reducer of Suzhou Xinlong Chemical Building Materials Co., Ltd.; the defoamer is an organosilicon defoamer XPJ820; and the particle size of the fine sand is less than 0.1 mm.

[0032] The above-mentioned leveling method based on gypsum-based floor material comprises the following steps: Step S1, determining the leveling thickness: according to the preset surface elevation after the floor is laid, subtract the preset thickness of the floor to obtain the leveling thickness; Step S2, applying an interface agent: fully moisten the base floor, and apply a water-based interface agent on the base floor; Step S3, setting a dry ground material layer: taking dry ground material and laying it on the ground base, and then laying the prefabricated panels, tapping and compacting them so that the prefabricated panels are in a horizontal state, so that a compacted and flat dry ground material layer is formed under the prefabricated panels; Step S4, setting the pouring partition plate: designing the construction width of one pouring according to the construction thickness, setting two adjacent pouring partition plates according to the construction width requirement, and sealing the gap between the partition plate and the ground with the mixed ground material; Step S5, preparing the leveling material: mixing the raw materials of the leveling material evenly to obtain a mixed material, and then adding water thereto, mixing evenly to obtain a leveling material slurry; Step S6, pouring: pour a layer of leveling material slurry evenly on the dry ground material layer to obtain a leveling material layer; lay the prefabricated board on the leveling material layer, tap and compact it to make the prefabricated board in a horizontal state.

[0033] The mass ratio of the mixed material to water in step S5 is 100:25.

[0034] Example 2 This example provides a gypsum-based floor material and a leveling method based on the gypsum-based floor material, which is basically the same as Example 1, except that it includes the following raw materials in parts by weight: 65 parts of desulfurized building gypsum, 7 parts of graphene, 6 parts of fly ash, 4 parts of cement, 1.2 parts of water reducer, 0.15 parts of defoaming agent, 1.5 parts of corn sugar residue, 0.3 parts of carboxymethyl cellulose, and 10 parts of fine sand.

[0035] Example 3 This example provides a gypsum-based floor material and a leveling method based on the gypsum-based floor material, which is basically the same as Example 1, except that it includes the following raw materials in parts by weight: 70 parts of desulfurized building gypsum, 8 parts of graphene, 7 parts of fly ash, 4.5 parts of cement, 1.5 parts of water reducer, 0.2 parts of defoaming agent, 2 parts of corn sugar residue, 0.35 parts of carboxymethyl cellulose, and 13 parts of fine sand.

[0036] Example 4 This example provides a gypsum-based floor material and a leveling method based on the gypsum-based floor material, which is basically the same as Example 1, except that it includes the following raw materials in parts by weight: 75 parts of desulfurized building gypsum, 11 parts of graphene, 9 parts of fly ash, 5.5 parts of cement, 1.9 parts of water reducer, 0.25 parts of defoaming agent, 2.5 parts of corn sugar residue, 0.45 parts of carboxymethyl cellulose, and 18 parts of fine sand.

[0037] Example 5 This example provides a gypsum-based floor material and a leveling method based on the gypsum-based floor material, which is basically the same as Example 1, except that it includes the following raw materials in parts by weight: 80 parts of desulfurized building gypsum, 12 parts of graphene, 10 parts of fly ash, 6 parts of water, 2 parts of water reducer, 0.3 parts of defoaming agent, 3 parts of corn sugar residue, 0.5 parts of carboxymethyl cellulose, and 20 parts of fine sand.

[0038] Comparative Example 1 This example provides a gypsum-based floor material and a leveling method based on the gypsum-based floor material, which is basically the same as Example 1, except that: no graphene is added.

[0039] The heat transfer coefficient (W / (m 2 ▪K) test, which is calculated by the following formula: K = 1 / R, R is the total thermal resistance of the gypsum-based leveling layer: The heat transfer coefficients of Examples 1-5 and Comparative Example 1 are 4.85 W / (m 2 ▪K)、3.70 W / (m 2 ▪K)、3.75 W / (m 2 ▪K)、3.95 W / (m 2 ▪K)、3.98 W / (m 2 ▪K) and 2.65 W / (m 2 ▪K).

[0040] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the contents of the present invention and implement them accordingly. They cannot be used to limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A leveling method based on gypsum-based floor materials, characterized in that: The steps include: Step S1, determining the leveling thickness: according to the preset surface elevation after the floor is laid, subtract the preset thickness of the floor to obtain the leveling thickness; Step S2, applying an interface agent: fully moisten the base floor, and apply a water-based interface agent on the base floor; Step S3, setting a dry ground material layer: taking dry ground material and laying it on the ground base, and then laying the prefabricated panels, tapping and compacting them so that the prefabricated panels are in a horizontal state, so that a compacted and flat dry ground material layer is formed under the prefabricated panels; Step S4, setting the pouring partition plate: designing the construction width of one pouring according to the construction thickness, setting two adjacent pouring partition plates according to the construction width requirement, and sealing the gap between the partition plate and the ground with the mixed ground material; Step S5, preparing the leveling material: uniformly mixing the raw materials of the leveling material to obtain a mixed material, and then adding water thereto and mixing uniformly to obtain a leveling material slurry; the dry floor material and the mixed material are made of the same material; Step S6, pouring: pour a layer of leveling material slurry evenly on the dry floor material layer to obtain a leveling material layer; lay prefabricated panels on the leveling material layer, tap and compact them to make the prefabricated panels in a horizontal state.

2. The leveling method based on gypsum-based floor material according to claim 1, characterized in that: In step S5, the mass ratio of the mixed material to water is 100:(25-35).

3. The leveling method based on gypsum-based floor material according to claim 1, characterized in that: In step S3, the dry floor material includes the following raw materials in parts by weight: 60-80 parts of desulfurized building gypsum, 5-12 parts of graphene, 5-10 parts of fly ash, 3-6 parts of cement, 1-2 parts of water reducer, 0.1-0.3 parts of defoamer, 1-3 parts of corn sugar residue, 0.2-0.5 parts of carboxymethyl cellulose and 0-20 parts of fine sand.

4. The leveling method based on gypsum-based floor material according to claim 3, characterized in that: The desulfurized building gypsum is obtained by calcining flue gas desulfurized gypsum from a thermal power plant, wherein the content of beta hemihydrate gypsum is not less than 80%.

5. The leveling method based on gypsum-based floor material according to claim 3, characterized in that: The graphene is graphene with product number HGP-50 provided by Qingdao Yanhai Carbon Materials Co., Ltd.

6. The leveling method based on gypsum-based floor material according to claim 3, characterized in that: The particle size of the fly ash is 100-400 meshes.

7. The leveling method based on gypsum-based floor material according to claim 3, characterized in that: The cement is ordinary Portland cement P·O42.

5.

8. The leveling method based on gypsum-based floor material according to claim 3, characterized in that: The water reducer is a polycarboxylic acid-based water reducer, such as the PC high-efficiency water reducer produced by Suzhou Xinlong Chemical Building Materials Co., Ltd.

9. The leveling method based on gypsum-based floor material according to claim 3, characterized in that: The defoamer is organosilicon defoamer XPJ820.

10. The leveling method based on gypsum-based floor material according to claim 3, characterized in that: The particle size of the fine sand is less than 0.1 mm.