Building plaster thickening time control agent and preparation method thereof

A technology of building gypsum and coagulation regulator, which is applied in the field of building materials, and can solve the problems of being rarely used, unable to adjust the interval between initial setting and final setting, and expensive

Active Publication Date: 2014-07-30
CHENGDU SHANGZHU BUILDING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the building gypsum coagulation regulators used in industrial production are divided into two categories: retarders and coagulation accelerators. Common retarders include citric acid, polyphosphate, borax, tartaric acid, bone glue, protein organic matter, etc. These Retarders will either reduce the strength of the product or be expensive, and are rarely used in the production of ...

Method used

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  • Building plaster thickening time control agent and preparation method thereof
  • Building plaster thickening time control agent and preparation method thereof

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with specific examples.

[0028] A kind of preparation of building gypsum coagulant, comprises the following steps:

[0029] ①. The weighed specific surface area is 1000-4000cm 2 / g of commercially available building gypsum A is ground for 1 to 15 minutes to obtain ground building gypsum with a specific surface area of ​​5,000 to 10,000 cm 2 / g; 2. Take building gypsum and polycarboxylate water reducer after grinding, and the amount of polycarboxylate water reducer is 0.4-1.3% (percentage by weight) of the amount of building gypsum after grinding; 3. Take the weighed After good grinding, 1 / 10 of the building gypsum and the water reducer are stirred evenly at a speed of 10-50 rpm to obtain the mixture I for later use; ④, the mixture I and the remaining 9 / 10 have been weighed After the ground building gypsum is stirred evenly at a speed of 50-200 rpm, the gypsum coagulation modifier referred to in the ...

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Abstract

The invention discloses a building plaster thickening time control agent and a preparation method thereof, relating to a building material. The building plaster thickening time control agent comprises the following two components: building plaster with the specific surface area of 5000-10000cm<2>/g, and a polycarboxylic acid water-reducing agent, wherein the weight of the polycarboxylic water-reducing agent is 0.4-1.3% of that of the building plaster with the specific surface area of 5000-10000cm<2>/g. Compared with the prior art, the protected building plaster thickening time control agent is capable of shortening the die sinking time in production of products, and improving the production efficiency.

Description

technical field [0001] The invention relates to a building material, in particular to a building gypsum coagulation regulator and a preparation method thereof. Background technique [0002] Building gypsum refers to a powdery gelatinous material made of calcium sulfate dihydrate (CaSO4·2H2O) after dehydration treatment, with β-calcium sulfate hemihydrate (β-CaSO4·1 / 2H2O) as the main component. Natural gypsum, phosphogypsum, and desulfurized gypsum are three types of gypsum that are currently widely used in construction. Since the main component of the coagulation regulator involved in the present invention is ground building gypsum, in order to distinguish it from the unground building gypsum, the building gypsum of 1000-4000 cm2 / g is called ordinary building gypsum. [0003] Ordinary building gypsum, as one of the three major cementitious materials, can be used to produce building materials such as plastering gypsum, gypsum blocks, gypsum wallboards, and paper-faced gypsum...

Claims

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Application Information

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IPC IPC(8): C04B24/26
Inventor 黄彬黄涛庄端文徐晓东
Owner CHENGDU SHANGZHU BUILDING MATERIALS
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