Machine-made sand plastering mortar additive

Abstract

The invention relates to the field of building materials, and discloses a machine-made sand plastering mortar additive. The machine-made sand plastering mortar additive comprises the following components by mass percent: 10-20% of cellulose hydroxypropyl methyl ether hyprolose, 20-50% of starch ether, 10-40% of redispersible latex powder, 2-10% of air entraining agent and 10-30% of polycarboxylate superplasticizer. The machine-made sand is crushed by a special crusher. The machine-made sand plastering mortar additive has the defects of poor grain shape and high mountain flour content. The problem to be solved is as follows: the problem of poor mortar application property caused by the machine-made sand grain form is improved by adding the additive, and the adding quantity of the mountain flour in the mortar is improved. The machine-made sand plastering mortar additive disclosed by the invention is an environment-friendly material, the adding quantity is 0.05-0.15%, and the machine-made sand plastering mortar additive is low in adding quantity and high in cost performance. The machine-made sand mortar doped with the additive disclosed by the invention has excellent application property, high water-retention rate, high bonding strength and high mortar strength, the cement content is saved, hollowing and cracking of the mortar are effectively restrained, and the construction efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of building materials and relates to a plastering mortar admixture whose aggregate component is machine-made sand. Background technique [0002] The aggregate of ready-mixed mortar in my country is mainly natural sand. With the continuous increase of construction area, the demand for natural sand is also increasing. Coupled with the disorderly mining of natural sand, natural sand resources are close to depletion and serious damage the natural environment. In the future, the replacement of natural sand with machine-made sand will surely become the mainstream. However, the existing problems of machine-made sand are poor grain shape and unsatisfactory stone powder content. The mortar produced by machine-made sand has the following two problems: one is the poor construction of the mortar, that is, the shape of the machine-made sand is not round enough, and the bulk density is too large, which makes the machine-m...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved in the present invention is to solve the problems of poor workability of machine-made sand mortar and hollowing and cracking of mortar, and provide a machine-made sand plastering mortar admixture to be added to the mortar

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