Water-based mortar modifier, its preparation method and application

Abstract

The invention discloses a water-based mortar modifier, its preparation method and application. The modifier comprises the following preparation raw materials by mass: 10-20% of polyether polycarboxylic acid water reducing agent, 0.1-10% of air entraining components, 1-20% of coagulation retarding components, 0.1-2% of water retention components and 60-85% of water. The polyether polycarboxylic acid water reducing agent is prepared by the method of: dissolving an enol polyether macromonomer, acrylic acid, and maleic anhydride in water, conducting heating to raise the temperature to 60-70DEG C, then adding a persulfate water solution dropwisely, carrying out heat preservation under 60-65DEG C for 2-4h, then performing cooling to a temperature of 45DEG C, and adjusting the pH value of the system to 7-8, thus obtaining the polyether polycarboxylic acid water reducing agent. The modifier provided in the invention can form a protective film on a cement particle surface, and at the same time can produce uniform and tiny bubbles, as well as reduce the friction between the particles in the system, thus effectively improving the workability and plasticity of the mortar system. Furthermore, the mortar modifier provided in the invention is a water-based multifunctional building mortar modifier, and is convenient to use. Doping of the modifier can significantly improve the workability and vicidity of mortar, and can maintain the properties effectively for 8-16 hours.

Description

technical field [0001] The invention relates to a water-based mortar modifier and its preparation method and application. The water-based mortar modifier can be used to improve the construction performance of mortar (referring to workability and viscosity), especially to effectively maintain and prolong the mortar. A water-based modifier for construction properties. Background technique [0002] The mixture of cement, sand and water is called cement mortar. In construction projects, mortar is often used for wall masonry and for interior and exterior plastering. Therefore, mortar needs to have better construction performance (referring to workability and viscosity), and people often add rubber powder, modified cellulose, etc. to improve its performance. The workability and viscosity of traditional mortar lose quickly, and generally need to be stirred on site and used up within 3-4 hours. [0003] For a long time, an additive called "mortar king" has been commonly used on c...

AI Technical Summary

Problems solved by technology

[0005] In view of the fact that the existing mortar modifiers cannot maintain the construction performance of the mortar for a long time, and the existing solid mortar modifiers have defects such as inconvenient use and inaccurate measurement, the primary purpose of the present invention is to provide a water-based mortar Modifier, the mortar modifier is a stable water agent, which can significantly improve the workability and viscosity of mortar, and effectively maintain the above properties for 8-16 hours

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