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Process for preparing mixed plaster for plastering

A plastering gypsum, mixed-type technology, applied in the field of building materials, can solve the problems of the application and promotion of plastering gypsum, the price is very expensive, etc., and achieve the effects of less addition, lower product cost, and improved quality

Inactive Publication Date: 2006-01-25
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, the natural gypsum ore is first calcined into hemihydrate gypsum or anhydrous gypsum, and then mixed with admixtures to adjust the setting time and water retention. Although the amount of admixtures in plaster plaster is small, generally 4-8% , but the price is very expensive, accounting for about 40-50% of the product cost, which affects the application and promotion of plaster plaster

Method used

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Examples

Experimental program
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Embodiment Construction

[0015] The present invention is further described below by way of examples.

[0016] Put 350g of citrate gypsum dehydrated by centrifugation or pressing in a stirring pot. Dissolve 2g of CMC in 30ml of water, pour the solution into a stirring pot and stir evenly with the citric acid gypsum. Then put the gypsum slurry in a container and dehydrate it in an oven with a temperature of 150°C. The gypsum treated above becomes material A.

[0017] Put 150g of citrate gypsum that has been dehydrated by centrifugation or pressing in a high-temperature container, and put it in a high-temperature furnace with a temperature of 600°C for dehydration. The fired gypsum is B material.

[0018] Mix material A and material B together and then grind to obtain a finished mixed plaster plaster.

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Abstract

A process for preparing the mixed gypsum used for plastering purpose includes such steps as adding the aqueous solution of additive to raw gypsum, stirring, calcining to obtain semi-hydrated gypsum, calcining raw gypsum to obtain anhydrous gypsum, proportional mixing, and grinding. Its advantages are simple process and low cost.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a method for manufacturing stucco plaster. Background technique [0002] Plastering gypsum has fast setting and hardening, strong cohesive force, good waterproof performance, certain heat preservation, heat insulation and sound absorption performance, good volume stability, fine and smooth texture, convenient construction, and is a kind of superior performance for interior walls and ceilings. Advanced plastering material. It can be divided into three types: surface plaster plaster, bottom plaster plaster and insulation plaster plaster. Each type of plaster plaster can also be divided into hemihydrate gypsum type, anhydrous gypsum type and hemihydrate gypsum-anhydrous plaster due to its different phase composition. Gypsum mixed type. Generally, the natural gypsum ore is first calcined into hemihydrate gypsum or anhydrous gypsum, and then mixed with admixtu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B11/00C04B11/26C04B11/02C04B11/024C04B11/05
CPCC04B11/002C04B11/024C04B11/05
Inventor 陈志山
Owner TONGJI UNIV