A kind of thickening powder specially used for mechanical spraying mortar

Abstract

The invention provides special thickening powder for mechanical mortar spray coating. The special thickening powder is prepared from the following ingredients in parts by weight: 5 to 7.5 parts of modified cellulose ether, 300 to 400 parts of kaolin, 0.5 to 2 parts of air entraining agents, 1 to 5 parts of foaming stabilizers, 5 to 10 parts of naphthalene water reducers, 6 to 10 parts of modified polyvinyl alcohol, 5 to 10 parts of wood fiber, 5 to 20 parts of polyoxyethylene and 20 to 50 parts of modified emulsion powder. The total amount is 100 parts, and the insufficient parts are supplemented by fly ash. The thickening powder has the advantages that the mortar mixture has high retention rate, low viscosity, better bonding force and good anti-sagging performance; the influence on the intensity is not great; the storage period is long; the use method is simple; the effect is good; no pollution is caused on environment; the special thickening powder meets the performance requirements of the mechanical mortar spray coating.

Description

technical field [0001] The invention relates to the field of building materials, in particular to an admixture specially used for mechanical spraying mortar, specifically a thickened powder specially used for mechanical spraying mortar. Background technique [0002] Mechanical spraying mortar construction technology originated from Europe and has been successfully used in Europe for nearly 40 years. Mechanical spray plastering technology can be applied to civil buildings and public buildings, and can greatly improve the work efficiency of wall plastering and shorten the completion period. However, the traditional manual plastering method leads to low construction efficiency, astonishing material consumption, dust pollution on the construction site, and rising labor costs have always been the most troublesome problems for developers and contractors. It is pumped to the spray gun through the pipeline, and then with the help of the pressure of the air compressor, the mortar is...

AI Technical Summary

Problems solved by technology

However, the traditional manual plastering method leads to low construction efficiency, astonishing material consumption, dust pollution on the construction site, and rising labor costs have always been the most troublesome problems for developers and contractors. It is pumped to the spray gun through the pipeline, and then with the help of the pressure of the air compressor, the mortar is continuously and evenly sprayed on the wall and ceiling, and then leveled and rubbed to complete the plastering finish

[0003] Therefore, mechanical spraying mortar is a trend in the development of commercial mortar. At present, the performance of machine spraying mortar on the market needs to be improved. The requirements of machine spraying process for mortar mixture are high water retention rate, low viscosity, good cohesive force and flow resistance. Hanging performance, however, currently commercially available mortar additives or thickening powders cannot be well applied in mechanical spraying mortar

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