High-strength cement-based self-leveling mortar prepared by desulfurization calcium plaster and preparation method thereof

Abstract

The invention discloses a high-strength cement-based self-leveling mortar prepared by desulfurization calcium plaster, and belongs to the technical field of self-leveling mortar. The high-strength cement-based self-leveling mortar prepared by desulfurization calcium plasteris prepared from the following raw materials in parts by weight: 18 to 28 parts of desulfurized calcium plaster, 30 to 37 parts of aluminate cement, 5 to 6 parts of Portland cement, 35 to 39 parts of natural siliceous sand, 0.7 to 0.8 part of water reducing agent, and 0.01 part of thickener. The invention further discloses apreparation method of thehigh-strength cement-based self-leveling mortar prepared by the desulfurization calcium plaster. According to the high-strength cement-based self-leveling mortar prepared bythe desulfurization calcium plaster and the preparation method thereof, the performance characteristics of the desulfurized calcium plaster, high-alumina cement, and the ordinary Portland cement are fully utilized respectively, the prepared cement-based self-leveling mortar has the characteristics that the setting and hardening speeds are fast, fracture resistance and crush resistanceof early andlater periods are high, wear resistance is good,the surface is not prone to being pulverized, and impact performance is good; the plasterin the desulfurized calcium plaster is not subjected to treating processes such as pressure filtration and drying, so that the dispersion effect of the desulfurized plasterin cement slurry is better, the production cost is lowered, new approaches are provided forpreparation of cement-based self-leveling mortar and resource utilization of desulfurizedcalcium plaster,and economic and environmental benefits are good.

Description

technical field [0001] The invention belongs to the technical field of self-leveling mortar, in particular to high-strength cement-based self-leveling mortar prepared from desulfurized gypsum slurry and a preparation method thereof. Background technique [0002] Cement-based self-leveling mortar is composed of cement-based cementitious materials, fine aggregates, fillers and additives. It is a ground material that can flow and level after being mixed with water (or emulsion) or can be flowed and leveled with a little auxiliary paving. [0003] Cement-based self-leveling mortar is widely used in industrial plants because of its good leveling performance, high early strength, good wear resistance, easy laying, fast construction speed, short construction period, dual functions of bearing and decoration, and promising development prospects. , workshops, warehousing, commercial stores, exhibition halls, gymnasiums, hospitals, various open spaces and ground projects for offices. ...

AI Technical Summary

Problems solved by technology

[0008] Patent CN 103332920 A discloses a desulfurized gypsum mortar, patent CN 103351148 B discloses a desulfurized gypsum block, and patent CN 103113077 B discloses a desulfurized gypsum concrete. These patents can recycle desulfurized gypsum slurry, but desulfurized gypsum The pulp needs to undergo pretreatment processes such as pressing, drying and drying, so that the desulfurization gypsum changes from the state of dihydrate gypsum to the state of hemihydrate gypsum, so the production cost and energy consumption are relatively high; patent CN 101549982 A discloses a non-calcining desulfurization Gypsum brick, patent CN 103172339 A discloses a desulfurized gypsum board, these patents also require the desulfurized gypsum slurry to be filtered and dried, and the product is only suitable for dry occasions, thus limiting its use

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