Plastering gypsum and slurry
By using foam glass particles to replace traditional light aggregates in plaster plaster, the problem of high energy consumption of traditional light aggregates is solved, and the effective utilization of foam glass waste is achieved, achieving energy-saving and environmentally friendly results.
Patent Information
- Application Number
- CN202311724366.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-14
- Publication Date
- 2025-06-17
AI Technical Summary
The use of traditional light aggregate in plaster plaster requires a large amount of energy for calcination, and foam glass waste has not been effectively utilized.
Use foam glass particles to replace traditional light aggregates in plaster plaster, and form appropriate particle size distribution and bulk density by rationally formulating light aggregates and additives.
The reuse of foam glass waste is achieved, the use of traditional lightweight aggregates is saved, and the purpose of energy conservation and environmental protection is achieved.
Smart Images
Figure BDA0004611037600000031
Abstract
Description
Technical Field
[0001] The present invention relates to gypsum building materials, and in particular to a plastering gypsum. Background Art
[0002] Plastering gypsum, also known as plastering mortar, is a plastering material for the surface of interior walls and ceilings of buildings, which is prepared with a gypsum binder as the base material.
[0003] Lightweight plastering gypsum is made by using lightweight aggregates in plastering gypsum. Commonly used lightweight aggregates include granular materials such as expanded perlite, expanded vermiculite, and ceramsite. However, such lightweight aggregates need to be calcined using raw materials, and this process consumes a relatively large amount of energy.
[0004] Foamed glass is a commonly used thermal insulation material, usually prepared into foamed glass plates. Waste materials will be generated in foamed glass, such as broken pieces, especially during the cutting process. Summary of the Invention
[0005] The object of the present invention is to use foamed glass instead of traditional lightweight aggregates in plastering gypsum.
[0006] To this end, according to one aspect of the present invention, a plastering gypsum, by weight, comprises: gypsum, 55 - 95 parts; lightweight aggregate, 6 - 40 parts; filler, 0.5 - 6 parts; and additive, 0.01 - 3 parts. Among them, the lightweight aggregate contains foamed glass particles. The particle size distribution range of the foamed glass particles is 80 - 1000 microns.
[0007] Among them, in the lightweight aggregate, the weight fraction of the foamed glass particles is greater than 0 and less than or equal to 100%. The lightweight aggregate may further include at least one of expanded perlite particles, expanded vermiculite particles, or ceramsite. The bulk density of the lightweight aggregate is less than or equal to 1000 kg per cubic meter.
[0008] Among them, the additive is at least one of a retarder, a water retention agent, an air-entraining agent, a plasticizer, and a thixotropic agent.
[0009] According to another aspect of the present invention, a plastering gypsum slurry comprises the aforementioned plastering gypsum and water, wherein the weight ratio of the plastering gypsum to water is 1:0.3 - 0.6.
[0010] According to the technical solution of the present invention, waste foamed glass can be reused, saving or even eliminating traditional lightweight aggregates, and being energy-saving and environmentally friendly. Detailed Description of the Invention
[0011] The details of the technical solution of the present invention will be described below in conjunction with specific examples.
[0012] The term "parts by weight" used in this application refers to weight units with the same unit and the same quantity. For example, 1 part by weight can be 1 gram, or 1 kilogram, or 10 grams, or other numerical weight units. "Weight fraction" refers to the weight ratio of a specific component to a reference, expressed as a percentage.
[0013] Plastering gypsum is usually a powdery mixture, including gypsum, lightweight aggregate, filler, and additives.
[0014] The gypsum used in plastering gypsum can be calcined gypsum, such as the raw materials that meet the national standard GB / T 28627-2023 "Plastering Gypsum". The dosage of gypsum is usually 55-95 parts by weight.
[0015] The filler mainly plays a role in filling and supporting. Usually, limestone powder can be used as the filler. The parts by weight of the filler are usually 0.5-6 parts.
[0016] In this application, the additives can be the commonly used additives in plastering gypsum products. These additives can be obtained through commercial channels. For example, the additives can be at least one of a retarder, a water retention agent, an air-entraining agent, a plasticizer, and a thixotropic agent, and the total parts by weight are usually 0.01-3 parts. Specifically, the retarder can be a commonly used chemical preparation in the art, such as citric acid, tartaric acid, etc., and the parts by weight are usually 0.01-0.5 parts. The water retention agent can be cellulose ether, and the parts by weight are usually 0.15-0.35 parts. The thixotropic agent can be bentonite, and the parts by weight are usually 0.3-1.5 parts. The dosage of the air-entraining agent is usually 0.01-0.5 parts by weight.
[0017] The lightweight aggregate can be foam glass, or a combination of foam glass and at least one of expanded perlite, expanded vermiculite, and ceramsite. The bulk density of the lightweight aggregate is less than or equal to 1000 kilograms per cubic meter. Among them, the particle size distribution range of the foam glass particles is 80-1000 microns.
[0018] Mixing plastering gypsum and water and stirring can obtain plastering gypsum slurry. Usually, the weight ratio of plastering gypsum to water is 1:0.3-0.6.
[0019] In the examples given in Table 1, Examples 1-10 use a mixture of expanded perlite and foam glass particles in different proportions as the lightweight aggregate, and the control example uses expanded perlite as the lightweight aggregate. Among them, the particle diameter of the foam glass particles is 475 microns. The bulk density of the foam glass particles is 450 kilograms per cubic meter.
[0020] The examples of plastering gypsum in Table 1 are prepared according to the following parts by weight:
[0021] The total of gypsum and additives is 65 parts, among which, there is 1 part of filler, 0.1 part of retarder, 0.2 part of cellulose ether, 0.5 part of bentonite and 0.05 part of air-entraining agent;
[0022] There are 40 parts of lightweight aggregate, and the lightweight aggregate is prepared according to the proportions given in each example in Table 1.
[0023] Mix the components to form plastering gypsum, and then add 50 parts of water and stir evenly to make a slurry.
[0024] Refer to the method of GB / T 28627-2023 "Plastering Gypsum" of the national standard to test the strength of each example. The test results are shown in Table 1.
[0025] Table 1
[0026]
[0027] It can be seen from the results in Table 1 that, compared with the control example, the strengths of the samples using lightweight aggregates configured in different proportions are close and meet the requirements of the standard. Therefore, foam glass can be used to replace the traditional lightweight aggregate.
[0028] In the above description, the details of the technical solution of the present invention are elaborated. However, those skilled in the art can understand that the present invention is not limited to the specific details listed in the above embodiments, but can vary within the scope defined by the claims.
Claims
1. A plastering gypsum, by weight, comprises the following components: Gypsum, 55 - 95 parts; Light aggregate, 6 - 40 parts; Filler, 0.5 - 6 parts; and Additive, 0.01 - 3 parts; wherein, The lightweight aggregate includes foam glass particles.
2. The plastering gypsum according to claim 1, wherein, The particle size distribution range of the foam glass particles is 80 - 1000 microns.
3. The plastering gypsum according to claim 1, wherein, In the lightweight aggregate, the weight fraction of the foam glass particles is greater than 0 and less than or equal to 100%.
4. The plastering gypsum according to claim 1, wherein, The lightweight aggregate further includes at least one of expanded perlite particles, expanded vermiculite particles, or ceramsite.
5. The plastering gypsum according to claim 1, wherein, The bulk density of the lightweight aggregate is less than or equal to 1000 kilograms per cubic meter.
6. The plastering gypsum according to claim 1, wherein, The additive is at least one of a retarder, a water retention agent, an air-entraining agent, a plasticizer, and a thixotropic agent.
7. A plastering gypsum slurry, comprising the plastering gypsum according to any one of claims 1 - 6 and water, wherein the weight ratio of the plastering gypsum to water is 1:0.3 - 0.6.