A kind of preparation technology of sheet dry mortar

Abstract

The invention is applicable to the field of construction mortar, and provides a preparation process of sheet-like dry mortar. The water-soluble hot-melt adhesive is melted separately and then mixed with a dry mixture to obtain a wet mixture, and the wet mixture is adhered to the surface of the support body. On both sides of the plane, after cooling and hardening, a flaky dry mortar is obtained. This method can significantly reduce the heating temperature of the water-soluble hot-melt adhesive and reduce the energy consumption of preparation; at the same time, the efficiency of mortar preparation can be improved due to the shortened heating time; moreover, the dissolution temperature of the water-soluble hot-melt adhesive selected in the present invention is less than 100°C , when mixed with inorganic cementitious materials, etc., the mixing temperature is also within 100°C, which will not affect the performance of inorganic cementitious materials such as cement and other organic additives, thus ensuring the overall performance of the mortar.

Description

technical field [0001] The invention relates to the field of construction mortar, in particular to a preparation process of sheet-like dry mortar. Background technique [0002] Dry-mixed mortar is a dry powder mixed with cementitious materials, aggregates, additives and other raw materials. It is one of the most used materials in construction projects. 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 unstable. [0003] An existing solution to the above-mentioned problems is to prepare sheet-like mortar by hot-melt method, such as patent EP2994283B1, that is, adding water-soluble hot-melt adhesive powder to the raw material of dry-mixed mortar and mixing to form a new mixture, and heating the mix...

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

A higher heating temperature will have two negative effects: one is high energy consumption for preparation, and the other is a decrease in product performance

For example, when the heating temperature of cement exceeds 100°C, the setting time will be shortened sharply, and false setting will appear, and other organic additives in the mortar will often change color, embrittlement, etc. when the temperature exceeds 100°C, which will affect the performance of the mortar. influences

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