Cement mortar with high crack resistance and used for plastering and preparation method of cement mortar

Abstract

The invention relates to cement mortar with high crack resistance and used for plastering and a preparation method of the cement mortar and in particular relates to the field of building mortar. The mortar is prepared by mixing the following components in weight ratio: 20-30 of ordinary Portland cement, 55-65 of heavy aggregates, 8-12 of fine aggregates and 1.2 of compound additive; the compound additive is prepared by mixing the following components in parts by weight: 0.5 part of redispersible latex powder, 0.25 part of cellulose ether, 0.2 part of calcium formate, 0.15 part of wood fibers and 0.1 part of crack-resistant polypropylene fibers; and a finished product can be packaged by separately adding the ordinary Portland cement, the fine aggregates, the compound additive and the heavyaggregates into a stirrer in sequence and carrying out uniform stirring. The cement mortar does not contain any volatile solvents and harmful heavy metals, is environment-friendly inorganic mortar andis simple and practical in production process, good in crack resistance and high in shock resistance.

Description

technical field [0001] The invention relates to the field of building mortar, in particular to a high-crack-resistant cement mortar and a preparation method thereof. Background technique [0002] At present, in the field of construction mortar, commercial concrete is in the process of rapid and stable development, and commercial mortar is only a new trend in the development of urban architectural decoration industry. Ordinary dry powder mortar has already belonged to the category of new products, and the anti- Crack functionality is rarely involved. [0003] As the traditional cement plastering mortar commonly used for building wall leveling, due to its own structure, it needs to be thickened by 1-3cm, which not only increases the load of the building, but also has many consumables, heavy vertical transportation burden, low construction efficiency, and extremely It is easy to cause drying shrinkage and temperature difference cracking. [0004] In view of the above-mentione...

AI Technical Summary

Problems solved by technology

[0003] As the traditional cement plastering mortar commonly used for building wall leveling, due to its own structure, it needs to be thickened by 1-3cm, which not only increases the load of the building, but also has many consumables, heavy vertical transportation burden, low construction efficiency, and extremely Easy to cause drying shrinkage and temperature difference cracking