High-temperature anhydrite sand-free self-leveling mortar and preparation method thereof

Abstract

The invention discloses high-temperature anhydrite sand-free self-leveling mortar and a preparation method thereof, the high-temperature anhydrite sand-free self-leveling mortar comprises the following components in parts by mass: 50 parts of high-temperature anhydrite, 0.05 part of fiber, 8.5-14 parts of an admixture, 19-20 parts of water and 0.75-1 part of a gypsum plastic stabilizer, and the high-temperature anhydrous gypsum is mixed-phase anhydrous gypsum prepared by heating dihydrate phosphogypsum at a high temperature, calcining and dehydrating, and the admixture is set as a cementing material for concrete meeting national standard requirements. The admixture is one or a mixture of more of Portland cement, fly ash, silicon powder, ground steel slag powder and mineral powder, the Portland cement is P.O42.5 ordinary Portland cement, the fly ash is II-grade fly ash, the silicon content of the silicon powder is greater than or equal to 90%, the ground steel slag powder is steelmaking slag ground steel slag powder, and the mineral powder is 95-grade mineral powder. According to the high-temperature anhydrite sand-free self-leveling mortar and the preparation method thereof, the high-temperature anhydrite sand-free self-leveling mortar has relatively high water resistance and high strength.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a high-temperature anhydrous gypsum sand-free self-leveling mortar and a preparation method thereof. Background technique [0002] my country is rich in gypsum mineral resources, as well as a large amount of industrial by-product gypsum (phosphogypsum, desulfurization gypsum), which provides abundant resources for the preparation and production of gypsum. Because gypsum has the advantages of fast setting time, good plasticity, light weight, good mold filling, renewable utilization, micro-expansion, and low carbon emissions in raw material production (compared with cement cementitious materials), gypsum is used as a traditional green Building material with extremely high utilization value. The gypsum self-leveling mortar currently used in the market is mainly a mixed material made of α-type and β-type hemihydrate gypsum as the main gypsum base material and ...

AI Technical Summary

Problems solved by technology

[0003] Because the current gypsum self-leveling mortar uses a large amount of river sand and hemihydrate gypsum base material, the current gypsum self-leveling mortar has the disadvantages of poor water resistance, low strength, easy delamination of gypsum self-leveling slurry, and poor construction reliability.

This limits the application and development of gypsum self-leveling mortar

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