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Macromolecular gypsum retarder and preparation method and application thereof

A gypsum retarder and polymer technology, which is applied in the field of polymer gypsum retarder and its preparation, can solve the problems of gypsum strength reduction and achieve the effects of reducing growth rate, reducing strength loss and improving strength

Active Publication Date: 2021-03-30
BEIJING BUILDING MATERIALS ACADEMY OF SCI RES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] An embodiment of the present invention provides a high-molecular gypsum retarder, which can achieve high-efficiency retardation during the hardening process of gypsum slurry, and at the same time reduce water consumption and improve strength, effectively solving the problems caused by retardation. Problems that cause a decrease in the strength of the plaster

Method used

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  • Macromolecular gypsum retarder and preparation method and application thereof
  • Macromolecular gypsum retarder and preparation method and application thereof
  • Macromolecular gypsum retarder and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Present embodiment provides a kind of polymer gypsum retarder, its preparation method comprises:

[0057] Put 60 parts of polyepoxysuccinic acid, 20 parts of polyaspartic acid, and 20 parts of polycarboxylate water-reducer, all according to the weight of dry matter, into a mixer, mix well, and spray dry to make powder. A polymer gypsum retarder is obtained.

[0058] Add the retarder prepared in this embodiment to the building gypsum, the amount of the retarder added is 0.01% of the total weight of the gypsum, and the setting time and strength performance tests are carried out under the water consumption of standard consistency.

Embodiment 2

[0064] Present embodiment provides a kind of polymer gypsum retarder, its preparation method comprises:

[0065] Put 20 parts of polyepoxysuccinic acid, 40 parts of polyaspartic acid, and 40 parts of polycarboxylate water reducer, all according to the weight of dry matter, into a mixer, mix well, and spray dry to make powder. A polymer gypsum retarder is obtained.

[0066] Add the retarder prepared in this embodiment to the building gypsum, the amount of the retarder added is 0.05% of the total weight of the gypsum, and the setting time and strength performance test are carried out under the water consumption of the standard consistency. plaster of construction for comparison.

[0067] Table 2 Embodiment 2 Performance Test Results Comparison

[0068]

Embodiment 3

[0070] Present embodiment provides a kind of polymer gypsum retarder, its preparation method comprises:

[0071] Put 40 parts of polyepoxysuccinic acid, 30 parts of polyaspartic acid, and 30 parts of polycarboxylate superplasticizer into a mixer according to the weight of dry matter, mix well, and spray dry to make powder. A polymer gypsum retarder is obtained.

[0072] Add the setting retarder prepared in this embodiment to building gypsum, the adding amount of retarder is 0.5% of the total weight of gypsum, and carry out setting time and strength performance test under the standard consistency water consumption, simultaneously with no adding retarder plaster of construction for comparison.

[0073] Table 3 Embodiment 3 Performance Test Results Comparison

[0074]

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Abstract

The invention provides a macromolecular gypsum retarder and a preparation method and application thereof, and the macromolecular gypsum retarder comprises the following raw materials: polyepoxysuccinic acid, polyaspartic acid and a polycarboxylate superplasticizer. The invention also provides a preparation method of the polymer gypsum retarder and application of the polymer gypsum retarder. The polymer gypsum retarder provided by the invention can realize efficient retarding in the gypsum slurry hardening process, reduces the water consumption, improves the strength, and effectively solves theproblem of gypsum strength reduction caused by retarding.

Description

technical field [0001] The invention relates to the technical field of gypsum cementitious materials, in particular to a polymer gypsum retarder and its preparation method and application. Background technique [0002] Hemihydrate gypsum and anhydrous gypsum formed by calcining or cooking gypsum at a certain temperature are important cementing materials. Gypsum cementing materials have low production energy consumption, light weight, good fire resistance, fast condensation, heat insulation, Moisture, good decoration and many other advantages. It has been widely used in the preparation of gypsum composite cementitious materials, architectural gypsum products, industrial molds, art models, etc. [0003] In practical application, the setting time of gypsum cementitious material is short after mixing with water, and it can lose its fluidity in a few minutes. Therefore, in order to meet the requirements of production process or construction operation, it is often necessary to ad...

Claims

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Application Information

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IPC IPC(8): C04B24/32C04B103/22
CPCC04B40/0042C04B2103/22C04B24/32C04B24/28C04B24/2647C04B28/147
Inventor 王肇嘉战佳宇杨飞华李沙李万民温晓庆
Owner BEIJING BUILDING MATERIALS ACADEMY OF SCI RES
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