Gypsum-based self-leveling mortar composition

Abstract

The invention belongs to the field of material preparation, and discloses a gypsum-based self-leveling mortar composition. The mortar composition comprises aggregate, sand, desulfurized gypsum powder, cement and auxiliaries, wherein the aggregate comprises a core material, a porous layer material and a ceramic layer structure material. The aggregate used by the gypsum-based self-leveling mortar composition is of a core-porous layer-ceramic layer structure, and the product performance is stable, so that the mortar composition has good construction performance.

Description

technical field [0001] The invention belongs to the field of material preparation, and more specifically relates to a gypsum-based self-leveling mortar composition. Background technique [0002] Aggregate means that the bulk density is 900-1500Kg / m 3 The general term for coarse and fine aggregates, the main categories include artificial aggregates (such as ceramsite, pottery sand, etc.), natural aggregates (such as pumice, volcanic cinder, etc.) and industrial waste aggregates (such as natural coal gangue, cinder, etc.). [0003] The aggregate preparation method is to physically mix industrial waste, cement, alkaline substances and other materials, then granulate through a disc granulator, and then calcinate at a high temperature above 1000°C to form aggregates. At present, aggregates are mainly sintered ceramsite, carbonized steel slag light aggregate and massive aggregate, and the basic manufacturing process is already very mature. Currently known aggregates include: ...

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Problems solved by technology

[0004] CN 110950558 A records that the ceramic waste is used to prepare high-strength aggregate and the high-strength aggregate prepared. It has good thermal performance, high utilization rate of industrial solid waste, and the cylinder compressive strength increases with the increase of bulk density, and the maximum strength can reach 11.8MPa. It is a rare high-strength aggregate, but its preparation process includes a calcination procedure. Stage virtually increases energy consumption and cost, and cannot be promoted for a long time under the current environment that advocates high environmental protection and low energy consumption

[0005] China Building Materials Research Institute Co., Ltd. also introduced a preparation method for hydrophobic ceramsite aggregates. The aggregates prepared by it have the advantages of high solid waste utilization rate, high strength, good hydrophobicity and sound insulation, etc., but its The production process is complicated, and it needs to be mixed and granulated, calcined and granulated, and the surface is coated with hydrophobic materials for three granulations. In addition to calcination, the ceramsite needs to be additionally coated with hydrophobic materials, which also greatly increases the production cost and is not conducive to mass production.

[0006] Therefore, in view of the high manufacturing cost of the above-mentioned existing aggregates, the prepared aggregates not only need to be calcined at high temperature, but also need to add more polymer additives, it is urgent to redesign the formula of the aggregates and prepare a A highly adaptable, high-strength aggregate that can replace construction sand

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