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Gypsum powder with high cracking resistance

A technology of gypsum powder and high crack resistance, which is applied in the field of high crack resistance gypsum powder, which can solve problems such as drumming and easy cracking of gypsum powder, and achieve the effect of improving adsorption performance, internal strength and coupling force, and improving internal coupling

Inactive Publication Date: 2018-12-07
FOSHAN CHANCHENG DISTRICT NUOGAO ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a highly crack-resistant gypsum powder for the problems of easy cracking and swelling of commonly used gypsum powder at present.

Method used

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  • Gypsum powder with high cracking resistance

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preparation example Construction

[0027] The preparation method of composite anti-cracking component A, comprises the following steps:

[0028] (1) Mix steel slag, fly ash, and HCl solution with a concentration of 0.1mol / L in a water bath at 30~45℃ in a mass ratio of 3:1~2:15~25, and stir at 300~500r / min for 30~50min. Filtration, take the filter residue and add reagent A with a mass of 20~35% of the filter residue to mix, and wet ball mill at 250~350r / min for 20~40min to obtain ball mill. Dry in an oven at 60~80°C to obtain a dried product, take the dried product at a mass ratio of 1:10~15, add anhydrous ethanol and mix, transfer to an ultrasonic disperser, and ultrasonically disperse it for 15~25min at a frequency of 45~55kHz to obtain Dispersion liquid, at 45~55℃, take the dispersion liquid and add polyvinylpyrrolidone with 0.2~0.3 times the mass of the dispersion liquid to mix, stir and mix at 300~500r / min for 4~6h, pretreatment liquid;

[0029] (2) In parts by weight, take 5-10 parts of ethyl orthosilicat...

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Abstract

The invention relates to gypsum powder with high cracking resistance and belongs to the field of gypsum preparation. The gypsum powder has the beneficial effects that acid-liquid mixing is carried outon coal ash and steel slags, and glycerinum and anhydrous ethanol are adopted for ball milling and refining treatment to improve the surface activity of the mixture and enhance the agglomeration property with other components, so that the refinement of the surface and internal structures can be made up and the internal strength and the bonding force of the hydrated gypsum powder are effectively improved; aggregates and gypsum and the like are ball-milled and mixed with moss, in the process of constant-temperature constant-humidity lighting treatment, metabolic products of the moss can corrodethe surface of the mixture, so that the porosity and the roughness of the surfaces of the components can be improved; not only the wetting property and the adhesion of the surface can be improved, but also the adhesive components can further penetrate into pores in the system, then all the components can be firmly bonded together, so that the anti-cracking and anti-bulging properties of the system can be further improved; the problems of easy cracking and bulging of the current common gypsum powder are solved.

Description

technical field [0001] The invention belongs to the field of gypsum preparation, in particular to a high crack-resistant gypsum powder. Background technique [0002] Gypsum products include dihydrate, hemihydrate and anhydrite. Landplaster dihydrate is calcium sulfate crystals with two waters of crystallization. In the heat treatment under different conditions, the gypsum dihydrate dehydrates 1.5 crystal waters to become the gypsum hemihydrate. Dihydrate gypsum powder becomes anhydrous gypsum powder when two crystal waters are removed. The calcined raw materials of dihydrate gypsum powder, hemihydrate gypsum powder and anhydrite powder are mainly natural gypsum and industrial by-product gypsum. Natural gypsum or industrial by-product gypsum products contain external water (absorbed water), therefore, these raw materials need to be removed from external water before calcination to remove crystal water. In summary, the calcination of gypsum powder mainly includes two proce...

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B111/20
CPCC04B28/141C04B2111/20C04B24/20C04B24/383C04B24/06C04B22/16C04B24/18C04B2103/302C04B18/08C04B18/142C04B24/2652C04B24/42C04B22/0013C04B22/126C04B24/02C04B22/106C04B22/124C04B22/00C04B14/00C04B24/38C04B22/143C04B18/24C04B22/149C04B22/08C04B24/226
Inventor 胡次兵陈建春卢星
Owner FOSHAN CHANCHENG DISTRICT NUOGAO ENVIRONMENTAL PROTECTION TECH CO LTD