A kind of preparation technology of sheet-like dry mortar and sheet-like dry mortar

Abstract

The invention is applicable to the field of construction mortar, and provides a preparation process of sheet-shaped dry mortar and sheet-shaped dry mortar, which comprise the following steps: mixing dry mixture with glue to obtain wet mixture; adhering the wet mixture On one or both sides of the plane of the support body, a wet flaky mortar is obtained; the wet flaky mortar is dried and hardened to remove part or all of the solvent in the wet flaky mortar to obtain a flaky dry mortar; wherein, the The dry mixture is obtained by at least mixing inorganic gelling materials and aggregates; the glue solution is obtained by dissolving a water-soluble binder in a solvent. The invention can ensure that the sheet-like dry mortar has sufficient strength, and at the same time, it can also have lower product cost, has a faster melting speed after encountering water, and can choose from many types of water-soluble binders.

Description

technical field [0001] The invention relates to the field of building mortar, in particular, to a preparation process of flaky dry mortar and the flaky dry mortar. Background technique [0002] Dry-mixed mortar is a dry powder mixed with cementitious materials, aggregates, additives and other raw materials, and is one of the most used materials in construction projects. However, there are two main problems in its application: first, serious dust pollution occurs when adding water and mixing at the construction site; Product quality is unstable. [0003] In order to solve the above-mentioned technical problems, there is a solution in the prior art to prepare sheet-like dry mortar by hot-melt method. For example, in patent EP2994283B1, water-soluble hot-melt adhesive powder is added to the dry-mixed mortar raw material and mixed to form a new mixture , by heating the mixture to melt the water-soluble hot-melt adhesive inside, and then pressing the above-mentioned mixture int...

AI Technical Summary

Problems solved by technology

However, there are two main problems in its application: one is that serious dust pollution is generated when adding water and mixing at the construction site, and the other is that the discrete product form and large raw material density difference lead to easy segregation and uneven distribution of components. Product quality is not stable

[0004] However, the main problem of the above-mentioned technical solution is that more water-soluble hot-melt adhesives need to be added. The reason is that in the process of preparing sheet-like dry mortar, the mixture needs to be heated to make the water-soluble hot-melt adhesive inside The melt glue melts, however, the water-soluble hot melt glue in the molten state has high viscosity, poor fluidity, and poor diffusion ability in the particle gap of the mortar mixture. Therefore, in order to obtain sufficient In order to have sufficient strength, the mixture needs to contain a high proportion of water-soluble hot melt adhesive to form a sufficiently dense adhesive network to ensure the strength of the sheet-like dry mortar, otherwise it is easily damaged during transportation and handling

[0006] To sum up, in the existing process of preparing sheet-like dry mortar by using the hot-melt method, it is difficult to ensure that the sheet-like dry mortar has sufficient strength, and at the same time has a lower product cost, and has a faster after contact with water. Melting speed, and there are few types of water-soluble hot melt adhesives to choose from

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