A kind of high-strength water-resistant desulfurization gypsum building self-leveling material and preparation method thereof

Abstract

A high-strength water-resistant desulfurized building gypsum self-leveling material and its preparation method, including the following raw material components and contents: raw materials include main materials and auxiliary materials; main materials include desulfurized building gypsum with a mass fraction of 50% to 70%, 6% to 10 % cement, 20% to 40% slag and 0% to 20% fly ash, the auxiliary materials are distributed according to the mass fraction of main materials as 0% to 6% steel slag, 0.1% to 0.4% special water reducing agent for gypsum, and 0.1% to 0.4% Retarder, 1% to 4% gypsum whiskers, 0.05% to 0.1% rubber powder and 0% to 40% sand rate; the preparation method includes the following steps: mortar preparation process, mortar slurry preparation process; the described The mortar preparation process is as follows: each raw material involved in the present invention is powdered according to the above-mentioned ratio, and mixed in a ball mill to form a powder; the mortar slurry preparation process is: according to the powder obtained in the water and mortar preparation process The mass ratio is 0.3:1-0.4:1. Add water to the prepared powder, stir evenly, and then add defoamer; the self-leveling material has high strength and high water resistance.

Description

technical field [0001] The invention relates to a self-leveling material, in particular to a desulfurized building gypsum self-leveling material with high strength and strong water resistance and a preparation method thereof. Background technique [0002] Desulfurization gypsum is a by-product of thermal power plants. In 2012, nearly 60 million tons of desulfurization gypsum were produced, and the utilization rate reached 86%. Desulfurization gypsum is a renewable resource of gypsum. Its comprehensive utilization is conducive to environmental protection, energy conservation and natural resources, and meets the requirements of my country's sustainable development strategy. Desulfurization gypsum is mainly used in cement retarder, paper-faced gypsum board, gypsum block, plastering gypsum and high-strength gypsum. Its defects such as large water content, frost return, cracking, poor water resistance and low added value restrict the development of desulfurization gypsum. Appli...

AI Technical Summary

Problems solved by technology

Gypsum-based self-leveling materials are mainly based on building gypsum, а-high-strength gypsum, anhydrite, etc., and are made by adding various admixtures, aggregates, etc., with small shrinkage, thermal insulation, sound insulation, humidity control and The construction speed is simple and the comprehensive cost is low; but the strength and water resistance of this gypsum-based self-leveling material are not good

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