Dry powder mortar aid and application thereof in mortar

Abstract

The invention discloses a dry powder mortar aid, which is prepared from fatty alcohol, polycarboxylate, polyacrylonitrile, acrylic block copolymer and nano silicon oxide powder. Simultaneously, the invention also provides application of the dry powder mortar aid in mortar, which comprises the following steps: mixing and stirring complete dry powder mortar aid, cement and sand uniformly, adding water into the mixture in a ratio of the water to ash of 1: 3-4, and stirring the mixture uniformly to form the material for construction. The dry powder mortar aid improves the defect of inherent hardness and brittleness of the mortar, improves the cracking resistance and leakage resistance of the mortar, reduces hollowness, increases adhesive force, simultaneously improves the workability, water-retaining property and sagging resistance of the mortar, has the advantages of less adding amount and high cost performance, and is particularly suitable for special dry powder mortar such as adhesive mortar and protective mortar in an outer heat insulation system of a thin-plastered outer wall of an expanded polyphenyl board, polyphenyl granular heat insulation mortar, inorganic heat insulation mortar, cement self-levelling mortar and the like.

Description

technical field [0001] The invention relates to an auxiliary agent, in particular to an auxiliary agent for dry powder mortar. [0002] The invention also relates to the application of the dry powder mortar additive in mortar. Background technique [0003] The reinforced concrete era of modern buildings is composed of cement, sand, and steel bars. Compared with wooden buildings, reinforced concrete buildings have the advantages of durability, firmness, high-rise construction, wind pressure resistance, rain resistance, and insect resistance. In order to further beautify the appearance of the building, people plaster the wall and stick tiles, etc.; in order to reduce the energy consumption of the building, various thermal insulation measures have been invented, such as the external thermal insulation of the external wall with thin plastering of expanded polystyrene board. system, polystyrene particle thermal insulation mortar, inorganic thermal insulation mortar, etc.; in ord...

AI Technical Summary

Problems solved by technology

[0005] (1) The tensile strength is low, far lower than its compressive strength;

[0006] (2) Poor impact resistance, which is a typical brittle material, that is, cast iron material;

[0007] (3) The crack resistance is poor. There are a large number of dry shrinkage cracks and temperature cracks in the components. These cracks will continue to change and develop over time, and tiny cracks will eventually develop into large cracks.

[0008] As a result, the quality of the mortar prepared on the construction site is unstable, the strength does not meet the requirements, and even the quality is poor, resulting in a series of problems such as cracking, leakage, hollowing, and falling off.