Fluorogypsum-based repair mortar

Abstract

The invention discloses a fluorogypsum-based repair mortar, which belongs to the technical field of building materials. The fluorogypsum-based repair mortar includes main ingredients and admixtures, and the main ingredients include the following components in parts by mass: 15-80 parts of fluorogypsum, 1-10 parts of active mineral admixtures, 20-75 parts of aggregates The admixture includes the following components: 0.5 to 3 parts of activator, 0.5 to 3 parts of coagulation regulator, 0.1 to 1 part of water reducer, 0.05 to 0.5 part of water-retaining thickener, and 0.1 to 0.5 part of redispersible emulsion 1 part, 0.05-0.5 parts of waterproofing agent. The fluorogypsum-based repair mortar uses a combination of type II anhydrite, coagulant and active mineral admixture, while quickly and safely stimulating type II anhydrite, some dense aluminosilicate three-dimensional network. While retaining the advantages of good volume stability and high tensile bond strength of gypsum, it also overcomes the disadvantages of low strength and poor water resistance of ordinary building gypsum materials. It uses waste residue from the fluorine chemical industry as the main raw material, which not only protects the environment, but also reduces the production cost of building materials.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a fluorogypsum-based repair mortar. Background technique [0002] Fluorogypsum is a by-product of hydrofluoric acid produced by hydrofluoric acid hydrolysis of fluorite. It belongs to type II anhydrous gypsum and is strongly acidic. At present, most of the fluorogypsum in China is directly stored as solid waste, which not only occupies land resources, but also pollutes the environment. Today, with the increasing consumption of natural resources, using waste fluorogypsum to produce high value-added wall repair mortar can not only make full use of waste resources, but also protect the soil and groundwater environment. [0003] Most of the existing building enclosures are made of lightweight materials such as autoclaved aerated concrete and shale bricks. The deformation between them and the floor, beams and columns due to changes in air humidity and temperature will caus...

AI Technical Summary

Problems solved by technology

Organic caulking agents have poor weather resistance, short service life, and are not fire-resistant; while cement mortar cannot meet the requirements of this application scenario because of its low bond strength and poor flexibility

The semi-water-based gypsum used for caulking and repairing of existing houses has low strength, poor water resistance, and narrow application range; cement-based materials have large shrinkage, low bond strength, and cracks and hollowing are prone to occur; while cement mortar has a large thickness It takes multiple fillings to achieve the effect

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