High-strength waterproof gypsum plaster prepared from waste slag in the fluorine chemical industry and preparation method of the gypsum plaster

Abstract

The invention discloses a high-strength waterproof gypsum plaster prepared from waste slag in the fluorine chemical industry. The gypsum plaster is characterized by being prepared form following raw materials by weight: 50-99% of fluorine gypsum powder, 0-40% of an active admixture, 0-20% of silicon-containing pressure slag, 0.5-20% of an alkaline activator, 0.2-5% of a sulfate activator, 0.1%-1% of a tackifier and 0.05%-0.5% of a water-retaining agent. According to the gypsum plaster, the raw materials are easily available, production technology and equipment are simple, the cost is low, and the gypsum plaster has breathing functions. During construction, the gypsum plaster can be blended by using cold water, and is suitable for mechanical spraying, roller coating and brush coating. The gypsum plaster has strong covering power and can be thinly coated. Connection is firm and no powder falls. The gypsum plaster has good economic benefit, social benefit and environmental benefit.

Description

[0001] technical field [0002] The invention relates to the technical field of building material production, in particular to a high-strength water-resistant plaster plaster prepared from fluorine chemical waste residue and a preparation method thereof. Background technique [0003] At present, the total amount of fluorine gypsum waste slag discharged by my country's fluorine chemical enterprises is about 2.5 million tons every year. In addition, a large amount of silicon-containing pressure slag and iron-containing pressure slag are also discharged. Among them, except for a small amount of fluorine gypsum waste residue used as cement additives, most of the fluorine gypsum waste residue and other silicon-containing pressure slag are disposed of by stacking, paving or landfilling, which not only wastes resources and sites, but also pollutes the environment. [0004] Gypsum is a non-toxic, harmless and healthy material, which has the ecological function of breathing and can a...

AI Technical Summary

Problems solved by technology

This process, due to the increase of the calcination link, has high energy consumption, and its mechanism is to generate dihydrate gypsum by hydration of hemihydrate gypsum or anhydrite gypsum to generate strength, but dihydrate gypsum has high solubility, low strength, and poor water resistance (softening coefficient Low, usually around 0.2 ~ 0.3), resulting in the performance of gypsum products can not meet the requirements