Mold-proof desulfurization gypsum mortar and preparation method thereof

Abstract

The invention discloses mold-proof desulfurization gypsum mortar and a preparation method thereof. The mortar is prepared from, by mass, 65%-75% of desulfurization gypsum, 15%-25% of pulverized fuel ash, 4%-5% of quick lime, 3%-5% of inorganic gel, 0.8%-1.2% of mold-proof agent and 1%-3% of anti-cracking agent. The preparation method of the mold-proof desulfurization gypsum mortar comprises the steps that weighing is performed according to raw material composition and mass percentage content, the desulfurization gypsum, the quick lime, the pulverized fuel ash, the inorganic gel, the mold-proof agent and the anti-cracking agent are sequentially added into a mixing machine for full and even mixing to prepare the mold-proof desulfurization gypsum mortar. The mortar prepared by adopting the method uses the desulfurization gypsum to replace natural gypsum. Due to high calcium sulphate dihydrate content in the desulfurization gypsum and adding of the quick lime and the pulverized fuel ash, and the alkalinity of the mortar is improved. In addition, the mold-proof agent and the anti-cracking agent are mixed in the mortar, molding with the passing of time is prevented, meanwhile a new way is opened for resourceful utilization of the desulfurization gypsum in industrial solid waste, resources are saved, and the natural environment is protected.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of building materials and solid waste, and in particular relates to a mildew-resistant desulfurized gypsum mortar and a preparation method thereof. Background technique [0002] The existing cement mortar has strong alkalinity, so it has anti-mildew and antibacterial properties within a certain period of time. However, as time goes by, the surface of the mortar is affected by CO in the air. 2 It is gradually acidified by the action of mold, etc., and its gaps are prone to mildew, erosion and damage to the finish, which affects the appearance and use of the building. [0003] At present, desulfurization gypsum is a by-product of flue gas desulfurization by wet lime / limestone-gypsum method in coal-fired power plants, and its main component is calcium sulfate dihydrate (CaSO 4 2H 2 O), the color is light yellow, neutral or slightly alkaline, and its content of calcium sulfate dihy...

AI Technical Summary

Problems solved by technology

[0002] The existing cement mortar has strong alkalinity, so it has anti-mildew and antibacterial properties within a certain period of time. However, as time goes by, the surface of the mortar is affected by CO in the air. 2 It is gradually acidified by the action of mold, etc., and its gaps are prone to mildew, erosion and damage to the finish, which affects the appearance and use of the building.