Water-resistant gypsum mortar and preparation method thereof

Abstract

The invention relates to the technical field of building materials, in particular to water-resistant gypsum mortar and a preparation method thereof. The mortar comprises the following components: 15 to 80 parts of semi-hydrated fiber gypsum powder; 10 to 30 parts of anhydrous gypsum powder; 5 to 10 parts of cement, 1 to 10 parts of finely ground quartz sand; 20 to 75 parts of silica powder, 0.5 to3 parts of bauxite, 0.1 to 0.3 part of copper sulfate, 0.5 to 3 parts of sodium lignin sulfonate, 0.1 to 1 part of naphthalene sulfonate formaldehyde condensate, 0.05 to 0.5 part of ethoxylated sodium alkyl sulfide, 0.1 to 1 part of fiber, 0.05 to 0.5 part of methyl sodium silicate and 50 to 170 parts of water. The slurry is excellent in overall configuration, the water resistance of the slurry is improved through good structural density and excellent strength, energy for attenuating sound transmission is effectively consumed, and the heat preservation performance of a slurry material is improved.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a water-resistant gypsum mortar and a preparation method thereof. Background technique [0002] At present, the gypsum-based thermal insulation mortar is poor in water resistance, which will greatly affect its promotion and application, and also cause a large amount of industrial by-product gypsum to accumulate, which cannot be effectively used. Occasionally, water-resistant thermal insulation mortar is also seen. Such materials can only form a thin film on the surface of the material to block capillary pores and cracks, which is a physical method, but it will still decay over time, poor durability, poor water resistance, and severely limited practicability. For example, the patent number is CN201710373904.2 for a fluorogypsum-based repair mortar, which includes 15-80 parts of fluorogypsum, 1-10 parts of active mineral admixture, 20-75 parts of aggregate, and 0.5 parts...

AI Technical Summary

Problems solved by technology

[0002] At present, the gypsum-based thermal insulation mortar is poor in water resistance, which will greatly affect its promotion and application, and also cause a large amount of industrial by-product gypsum to accumulate, which cannot be effectively used. Occasionally, water-resistant thermal insulation mortar is also seen. Such materials can only form a thin film on the surface of the material to block capillary pores and cracks, a physical method, but it will still decay over time, poor durability, poor water resistance, and severely limited practicability

For example, the patent number is CN201710373904.2 for a fluorogypsum-based repair mortar, which includes 15-80 parts of fluorogypsum, 1-10 parts of active mineral admixture, 20-75 parts of aggregate, and 0.5 parts of activator ~3 parts, 0.5~3 parts of coagulation agent, 0.1~1 part of water reducer, 0.05~0.5 part of water-retaining thickener, 0.1~1 part of redispersible emulsion agent, 0.05~0.5 part of water repellent, by forming a dense Aluminosilicate three-dimensional mesh achieves the purpose of increasing strength and enhancing water resistance; however, its slurry solidifies quickly, and the construction must be completed in a short period of time to achieve the effect, which limits the application site and has poor thermal insulation and sound insulation effects. User experience struggles to keep up

Another example is a water-resistant gypsum-based thermal insulation mortar whose patent number is CN201610321532.4, which uses desulfurized gypsum, mineral powder, cement, alkaline materials, cellulose ether, retarder, water reducing agent, thixotropic agent, polyphenylene particles, Water, through excitation with alkaline excitation materials, achieves the effect of high strength and good water resistance, but its slurry lacks sufficient settings in the longitudinal network layout, and the water resistance will decrease in high-frequency use shocks

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