Building plastering mortar additive

Abstract

The invention relates to an admixture for a plastering mortar in building, which belongs to a technology field of the building material. The building plastering mortar admixture of the invention comprises fly ash, calcium sulfonate, fat alcohol sulfonate and promoter. The weight percentage of each component is that: the fly ash of 50-80; the calcium sulfonate of 10-30; the fat alcohol sulfonate of 5-20 and the promoter of 5-15. The building plastering mortar admixture of the invention is a powder preparation with an ecological function type and has the advantages of simple production process and a poisonless and harmless admixture. Proved by the application, the building plastering mortar admixture of the invention has the characteristics that the performance of the admixture is stable, the performance price ratio is high, the mixing amount is low and the mixing amounts scope is ranging from 0.05 to 0.4 percent, as well as the using optical mixing amount (cement weight) is 0.1-0.2 percent. The stirred mortar has a good work consistency and cohesiveness performance and the water retaining capacity is greatly improved. The mortar on the wall greatly reduces or removes the quality faults of tympanic, cracking, powdering, loose wall surface when the mortar is hardened.

Description

technical field [0001] The invention belongs to the technical field of building materials, and relates to a building mortar for construction engineering, in particular to a mortar admixture used in cement mortar and mixed mortar in interior and exterior wall plastering operations. Background technique [0002] In recent years, construction mortar admixtures such as mortar essence, microfoam, lime net, mortar king, etc. have been used in construction projects, which have played a certain role in improving the workability of construction mortar and saving lime. However, in view of the use of existing mortar admixtures, through long-term observation and investigation, especially on-site inspections, it was found that the effect of building mortar admixtures after use is not ideal, especially in the interior and exterior wall plastering operations. Quality problems, exaggerated propaganda of the mortar admixture used, such as completely eliminating lime, saving cement, improving...

AI Technical Summary

Problems solved by technology

However, in view of the use of existing mortar admixtures, through long-term observation and investigation, especially on-site inspections, it was found that the effect of building mortar admixtures after use is not ideal, especially in the interior and exterior wall plastering operations. Quality problems, exaggerated propaganda of the mortar admixture used, such as completely eliminating lime, saving cement, increasing strength, etc., one-sided pursuit of the workability of mortar, sacrificing the comprehensive performance and durability of mortar, resulting in sanding after hardening of plastering mortar , cracking, hollowing, and loose walls

The reason is that the formula components lack systematic optimization combination, and the overall performance is poor; the second is that the process requirements are ignored during construction, especially in hot and dry environments, the mortar on the wall loses water too quickly, and cement and other cementitious materials cannot be obtained. The third is that the air-entraining is too large, the workability is pursued too much, and the range of the dosage is too narrow. Once the super-mixing causes the mortar to harden, the strength will drop sharply in the later stage.